User talk:Shaddack

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Hello, and welcome to Wikipedia. Thank you for your contributions. I hope you like the place and decide to stay. Here are a few good links for newcomers:

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P-T Extinctions[edit]

In relation to your recent additions to Permian-Triassic extinction event, it may be useful to review Wikipedia:Neutral point of view which explains how Wikipedia articles should be written on subjects which may be disputed. Overall you did a very good job with the hydrogen sulfide material, but it would be useful to identify which parts of the chain of events are likely to be disputed by other scientists. Also, the tone of your writing skews a little bit towards saying "this is the truth" rather than "this is new plausible idea that has not yet been adopted by the scientific community as a whole".

Of course, these issues can occur even in the writing of experienced editors, so don't feel bad, but it is important to think about the best way to frame the scientific debate without trying to unfairly take sides in issues that the scientific community has yet to resolve.

Dragons flight 09:54, Jun 12, 2005 (UTC)

Thanks :) I am new here, and not a native English speaker (hence some rather rough formulations). Also, my historical expertise is not too high, I just found this when doing research for another article and found this theory missing here. If you are more familiar with the criticism of this theory, please do the edits. --Shaddack 11:04, 12 Jun 2005 (UTC)


Hi Shaddack, thanks a lot for your work in the chemistry articles, excellent work! Would you mind having a look at the first paragraph of hydride? The definition there is confusing and seem self-contradictory. Cheers, AxelBoldt 23:13, 13 Jun 2005 (UTC)


Thanks for your contribs to the SEU stub. I haven't worked in the field for over a decade, so I appreciate others coming in and touching things up and/or fleshing out details. John Elder 3 July 2005 18:29 (UTC)

Depletion region and depletion zone[edit]

It might be more appropriate to put the merged version of these articles under depletion region, as that's by far the version I've seen most commonly (ref: Sedra and Smith, "Microelectronic Circuits", or check random papers at IEEE Xplore). It's also the term used most at p-n junction (though both are used there). --Christopher Thomas 19:38, 12 July 2005 (UTC)

Done as requested. Good idea. --Shaddack 20:39, 13 July 2005 (UTC)

Edit summaries[edit]

Hi Shaddack, I have noticed that you put a lot of work in enhancing chemistry-related pages. It would be a great help for other users watching those pages if you could provide a short summary of your edits, e.g. something like "+ [[Category:Solvents]]". Keep on, Cacycle 21:55, 23 July 2005 (UTC)

Red links[edit]

Thank you for your message about red links. I won't delete any more. Pintele Yid 09:50, 26 July 2005 (UTC)

Combat Information Center[edit]

Thanks for adding the article on Combat Information Center. It's been on my to do list for a while. You might try digging for a photo to add to the article at in the photos section. I'll add some to the article later, when I have more time. I was once an OS and worked in CIC. --Durin 14:44, 27 July 2005 (UTC)


Apologies... the one I got at RadioShack, the one which was mailed to me as a subscriber to Wired, and the one which was mailed to my wife for reasons that neither of us were able to determine all USB so I jumped to an inaccurate conclusion.

Pursuant to something or other in the licensing agreement, I forget what, I mailed one back to Digital Convergence with a polite demand that they pay for the cost of shipping it to them, and rather to my surprise they actually mailed me a check for the about-$2 shipping cost... Dpbsmith (talk) 19:34, 16 October 2005 (UTC)

CIC/NTDS images[edit]

Images a great. You tagged and sourced them properly. Nice work! For CIC, you might want to find a more current image of a CIC, not to replace the image that is on the article but to include a photo from 30 years on. There are many differences, and many similarities, as I suspect you know :) --Durin 15:14, 17 October 2005 (UTC)

Admin Nomination[edit]

You have been nominated for a admin position.

Please visit Wikipedia:Requests_for_adminship/Shaddack to indicate whether you choose to accept.  Ian13  19:35, 30 October 2005 (UTC)

Kraft vs. kraft[edit]

Shaddack, Thanks for adding a bit to the Kraft process article. I learnt a bit about this when I was working on sodium sulfate, but I wanted your opinion- should it be kraft or Kraft? I have seen both in the literature, do you have any idea which is the "correct" name? Thanks, Walkerma 04:29, 1 November 2005 (UTC)

I saw both versions as well. I do not have a solid opinion about this, nor I think it really matters at the end. I added a mention of this issue to the name paragraph of the article. Is it good enough to resolve or at least postpone the issue?

--Shaddack 05:20, 1 November 2005 (UTC)

That looks good now, thanks. Walkerma 20:39, 3 November 2005 (UTC)


That's a good picture you made for the retene article. -- Kjkolb 05:32, 6 November 2005 (UTC)

Thanks! If you want any other structure, let me know and I'll make it. --Shaddack 01:59, 10 November 2005 (UTC)

ethylene dichloride[edit]

Hi Shaddack, just to inform you: ethylene dichloride is always '1,2-dichloroethane. The 1,1-dichloroethane would be called ethylidene dichloride. As you were editing ethylene and not ethene, the use of the (in itself correct) systematic name could be considered inconsistent. Your choice. Wim van Dorst 11:10, 9 November 2005 (UTC).

Objection addressed, change deployed. Trivial name used as a link, systematic name mentioned in a bracket. Ethylene dichloride article amended with a link to ethylidene dichloride, with a mention it is a 1,1-dichloroethane. This should help non-native English speakers to cope better with English chem terminology. --Shaddack 02:01, 10 November 2005 (UTC)

Your RFA[edit]

Hi! As you know, your RFA bid did not receive the required level of support and as a result I had to fail it. This does not mean that you cannot be an admin, you can try again later and see what went wrong in this RFA. Regards, =Nichalp «Talk»= 18:53, 9 November 2005 (UTC)

Relative Time[edit]


I just thought I'd let you know that timezones are customizable on WIKIPEDIA, so when you quote a time, it doesn't necessarily mean anything... It might be better to refer to username or IP address instead of time... For example, this is how your revision line looked in my browser...

22:45, 15 November 2005 Shaddack (Rvv to version as of 00:09, 16 November 2005)

Which is to say "On November 15th at 10:45pm, I reverted the version to the one created on November 16th at 12:09am)

Because I have my timezone set to something other than yours, it just doesn't jive.

Thought you might like to know :O)


P.S. I'm not an expert at time so if I'm wrong and just misunderstood your comment, please forgive me. I can't balance my chequebook either.

Argh. Good comment. However this may be a slight problem, as I date the reverts via a greasemonkey script that takes the date/time from the page, and there is no info about the editor name on the old-version-edit page. I think there is a solution, but let me think of it for a while... --Shaddack 05:11, 16 November 2005 (UTC)
Do you know the monkey who wrote the script? It would be enough to just have it append the editor's timezone to give a recourse for someone really wanting to figure out the stamp... just as in your paragraph above... :O)
Good idea. (Yes, I know that monkey pretty intimately, it's me.) Done so. Passing the version author name from history page to edit page still remains on my pending tasks list. --Shaddack 17:56, 22 November 2005 (UTC)


Shaddack, I would be very grateful if you could please give an intelligent, rational and mature justification for reverting this page back to its old version. Please address the points I have mentioned in the Talk page. As you know, Wikipedia is freely editable so you do have to accept having improvements made to pages you may have written. Please put your rely on the Talk:Acrylamide Talk page. Thanks very much. Droid.

As per page history, I did not do any revert you seem to be complaining about. Please check the differences between the versions and see what I mean, as per talk page. --Shaddack 13:48, 20 November 2005 (UTC)

Ion implantation[edit]

I don't believe this falls under the category of thin film deposition, so I'm removing the category marker. If you disagree, feel free to leave a note on my talk page.--Joel 17:21, 20 November 2005 (UTC)


Hi Shaddack. I've noticed that you've added a couple of terpenes. I've been doing the same, in preparation for writing a much more complete article for terpene. I'll hopefully get to it soon. Perhaps this weekend. If you have any suggestions, please let me know. Edgar181 00:34, 24 November 2005 (UTC)

SiC, MoSi2[edit]

Do these really have a highly nonlinear PTC response? I thought that SiC, as a traditional semiconductor, was NTC. Only the titanates were mentioned in the class I took, but please correct me if I'm wrong. I'm also surprised to see SiC listed as a commercial heating element, and especially MoSi2: aren't these reserved for scientific/industrial furnaces?--Joel 05:38, 3 December 2005 (UTC)

Good question. Greenwood-Earnshaw: Chemistry of Elements specifies SiC as PTC, at least in my translation, however I won't bet my neck on it. --Shaddack 06:01, 3 December 2005 (UTC)

Corrosion in arc welding[edit]

Hi Shaddack, thanks for your contribution to arc welding. I have a few welding books but I couldn't find the information you added in any of them, so I thought I'd ask to see where you got it. References are really important, because at some point I'd like to make this article featured, and when that happens, all the parts of the article will need to be referenced. So if you could tell me the publication information of the book (as well as the page numbers) from which you got the information, that would be great, or you could add it yourself to the references section of the article. Thanks! --Spangineeres (háblame) 16:23, 3 December 2005 (UTC)

Sensitivization of stainless steels: William Callister, Material science and engineering, page 569-571. Hydrogen embrittlement, I loaned out that book; I remember that electrodes for welding of stainless steels have to be moisture-proof packed, and have to be kept dry at all cases because of they otherwise tend to release hydrogen. I added some URLs referencing these. --Shaddack 16:59, 3 December 2005 (UTC)

pitting corrosion[edit]

I saw your additions to the article and it seems very good! Thanks, Sammo 21:07, 10 December 2005 (UTC)

Isotope geochemistry[edit]

Now that was weird. I made a couple of links to Isotope geochemistry and was looking at the article thinking about shifting the superscripts where they belonged. Wham - my browser crashed! And when I get back to the article they've shifted - magic! Thanks for reading my mind :-) Seems there's quite a bit more to do there ... always more to do. Vsmith 05:18, 18 December 2005 (UTC)

Yikes! I18N failures[edit]

You are correct! I have been using a Java tool called WikiLink [1] (that web site is down at the moment) to do some category renames where I need to do bulk updates. It works on almost everything else, but I will investigate. -- Fplay 17:19, 20 December 2005 (UTC)

Orphaned category[edit]

Hi there. I've been going through Special:Uncategorizedcategories, and I noticed you recently removed the category Palm oil from all of its parent categories, leaving it an orphan. In the future, can you please nominate unneded categories for deletion at Wikipedia:Categories for deletion or request that they be speedy deleted using the {{db}} template, whichever is appropriate? Thanks, SCZenz 03:53, 23 December 2005 (UTC)

Thanks, should do that next time. --Shaddack 03:55, 23 December 2005 (UTC)
Cool, thanks. This time, I went ahead and deleted it. ;-) -- SCZenz 03:57, 23 December 2005 (UTC)


Thank you for providing images to the commons. Please keep in mind that images and other files on the commons must be under a free license... (rest of image tagging request commented out for brevity) ... Thank you. -- gildemax 16:53, 24 December 2005 (UTC) --

Corrected. Please check. Any more outstanding problems? --Shaddack 18:03, 24 December 2005 (UTC)
Every thing is fine. Thanks a lot. ---- gildemax 20:59, 28 December 2005 (UTC)

dirty dozen[edit]

Hi Shaddack,

recently you drew structures of Aldrin, Dieldrin and other chemicals that belong to the "dirty dozen" of the Stockholm Convention. They are fine and I use them in de:Aldrin, de:Dieldrin, and de:Heptachlor. May I ask you to draw also the structures of Chlordan (1,2,4,5,6,7,8,8-Octachlor-3a,4,7,7a-tetrahydro-4,7-methano-indan), which has just one chlorine more than Heptachlor (1,4,5,6,7,8,8-Heptachlor-3a,4,7,7a-tetrahydro-4,7-methanoinden)?

Dieldrin (1,2,3,4,10,10-Hexachlor-6,7-epoxy-1,4,4a,5,6,7,8,8a-octahydro-1,4-endo-5,8-exo-dimethanonaphthalin) has got a stereoisomer called Endrin (1,2,3,4,10,10-Hexachlor-6,7-epoxy-1,4,4a,5,6,7,8,8a-octahydro-1,4-endo-5,8-endo-dimethanonaphthalin). Could you also draw that?

Thanks anyhow, de:User:Blech

Chlordane and endrin are drawn and uploaded to Commons. Article for endrin was written as it was missing. Please check if everything is correct? --Shaddack 21:48, 2 January 2006 (UTC)
Chlordane is correct, I am sure. Endrin and Dieldrin do have a slightly different spatial orientation than here [2]. I would say they are o.k., but stereo chemistry is not a strong side of mine. Thanks a lot, de:User:Blech 21:57, 3 January 2006 (UTC)
Redid the formulas of aldrin, endrin, and dieldrin, to have better conformation. --Shaddack 09:05, 4 January 2006 (UTC)


Hi, I started a few pages on insecticides recently. Do you want to draw the strucutres or would you like me to. Also do you think we should make a large single article on OP insectcides or do you think we should make lots of smaller articles on each OP ? Cadmium 21:06, 7 January 2006 (UTC)

Please let me know the list of the pages in need of a formula? Regarding OPs, I am in favor of a hybrid approach: a comparison page about the entire family and a quick comparison table, and detailed articles about each member. That way we can be detailed enough when needed, and at the same moment have a brief walkthrough of all of them in a single place. --Shaddack 23:01, 7 January 2006 (UTC)

I have made a start on the main page, I have included an example of a class of substances which were worked on by a german chemical company (either BASF or Bayer).Cadmium 16:06, 8 January 2006 (UTC)

VEIL - pointer to more detailed specifications?[edit]

Message to Shaddack, Response requested:

I have been communicating with Danny O'Brien at EFF about a hoped-for talk with the staff of Senator Gordon Smith, who will be sheparding HR4569 aka "The Digital Transition Content Security Act of 2005" xxxx2006 through committee. I am also hoping to talk to technical managers at local companies Tektronix and Grass Valley Group to see if I can get them to communicate their concerns to the Senator.

I have designed video analog to digital converter chips, and have 3 patents on the subject (Mea culpa!). Ultra high speed data converters are difficult enough to design and manufacture as it is - this bill will be the equivalent of requiring aircraft carrier decks for speedboats. Right now, I am attempting to do a paper design to estimate just how big the addition might be to a general purpose high speed digitizer.

You did a nice writeup on VEIL for Wikipedia, but your article, and the references it points to, do not mention signalling levels (in IRE luminance, or in volts, or ...) for the VEIL signal, nor is the Rights Assertion Mark format discussed. While I imagine you would have included that information if you had it, perhaps you can point me at a source of detailed specifications for this technology, and I can interpret it at the implementation level.

Keith Lofstrom keithl at keithl dot com Beaverton, Oregon

Response issued via email. My hat off re the patents. --Shaddack 23:02, 7 January 2006 (UTC)

Science articles[edit]

Excellent work on the science articles, Shaddack. :-) Kjkolb 10:38, 9 January 2006 (UTC)

Stub templates on virus articles[edit]

Hi, you created some good stubs on various viruses. Please be aware in future that there is a more specific template, {{Virus-stub}} which is more relevant for those articles than {{med-stub}}. There is a list of all the approved stub templates at Stub types. Thanks! Mushintalk 16:45, 12 January 2006 (UTC)

Re Category:Anonymity networks[edit]

Excellent work. A lot of the anonymity-related articles were really badly categorized before, but your new articles seem well thought out, thanks. Haakon 22:31, 13 January 2006 (UTC)

Track (CD)[edit]

Hi Shaddack, looks like you were mid-sentence editing Track (CD) and forgot about it... interested in finishing it? Also, I have done a lot in the related articles, including a lot of merging. Quarl (talk) 2006-01-15 12:18Z

Structure of Pentazole[edit]

Hi Shaddack,

Just to draw your attention to the chemical structure of Pentazole which you've added to the article on that topic - it looks like you've inadvertently uploaded the structure of pyrrole instead. Pentazole is a five-membered ring containing only nitrogen atoms (HN5 as the neutral species, if such a thing exists), while pyrrole contains four carbons and a nitrogen (C4H5N). -- Gustavus 17:29, 19 January 2006 (UTC)

OUCH! Corrected. --Shaddack 18:04, 19 January 2006 (UTC)


I'm new here, but I think you made an alteration to make this statement about carotenoids:

"The double carbon-carbon bonds interact with each other in a process called conjugation. As the number of double bonds increases, the wavelength of the absorbed light increases, giving the compound an increasingly red appearance."

I think, however, that it is inaccurate. As wavelength absorbed increases, a redshift in absorbtion, how can the compound have an increasingly red appearance? It seems like it should say increasingly blue appearance. Brianf711 19:10, 20 February 2006 (UTC)

I don't think I was the one who made the changes, on carotenoids the revision history related is this. Regarding the formulation itself, I am not really certain, it is too late here now. --Shaddack 05:54, 21 February 2006 (UTC)

Drawing organic compounds[edit]

Hi there. I notice that you have uploaded several organic structures, and wondered what software you use - as I would like to do the same. Cheers. Jeff Knaggs 16:02, 18 March 2006 (UTC)

(Sorry for late answer.) I essentially copied the setting of Cacycle, with some minor tweaks (copy/paste to IrfanView, then automated scaling down to 50% and conversion to PNG using netpbm utilities). --Shaddack 05:10, 23 April 2006 (UTC)

Wikics template[edit]

Hi Shaddack! Recently, I created a new template to indicate English Wikipedia users who also contribute to the Czech Wikipedia.

Template:User wikics

Feel free to add it to your userboxes if you like it (and if you actually contribute). Happy Easter. Daniel Šebesta (talkcontribs) 22:35, 14 April 2006 (UTC)

Thanks for letting me know! I contribute to the CZ one less than rarely, though. My ambitions are somewhat more global. Will keep this in mind in case my conditions change. --Shaddack 05:10, 23 April 2006 (UTC)


Holy crap! Where did you find the information for all those compounds in article phosphor?!! really great, thanks! Perhaps you can verify/correct my guesses at the spectrum of the origin of the peaks in light from fluorescent tubes?[3]--Deglr6328 18:41, 22 April 2006 (UTC)

I took them from various manufacturers' webpages, and from an electrical engineer reference book. No clue if the spectrum is correct, but it looks plausible. We should write down how phosphors work on the atomic/lattice level... --Shaddack 05:10, 23 April 2006 (UTC)

Thanks for adding the links to the Sago mine story.[edit]

For a while, it seemed like I was working on it alone!--Beth Wellington 05:04, 28 April 2006 (UTC)


Hi there. I have nominated Category:Cellulose derivates for renaming as Category:Cellulose. Feel free to comment here if you are interested. I'm contacting you because you created the original category. Mike Dillon 02:20, 2 May 2006 (UTC)

Do whatever you think is the best. The name of the category is not critical - the grouping of related things together is more interesting than nomenclature details of the group. Alternately, describing the category as "Cellulose, its forms and its derivates" could make things cleaner. --Shaddack 19:47, 2 May 2006 (UTC)

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Moo ---- 02:03, 4 August 2006 (UTC)

Please help[edit]

Hello im 13 and i have a science project on glycerol. On this website i cant understand most of the words used in the artical. i have to do a three minute speech on something i dont understand. could you please send me some information i can undertand. my email address is If you did this for me i would be really greatfull thankyou


Hello Again. I created another baby stub for the article Decyl glucoside.[edit]

Feel free to jump into the action with the stubby decyl glucoside article. Good Luck. If you like I can create about another 100 or so articles! Decyl Glucoside 19:55, 2 October 2006 (UTC)


What is a good website for eBooks? 00:43, 2 October 2006 (UTC)

Image:Neutral red.png[edit]

The structure you drew for this compound seems to have a missing chloride ion. See here. Jeekc 05:29, 4 October 2006 (UTC)

I am aware of it. The chloride was considered unimportant, as it contributes only minimally to the chemical behavior and not at all to the color. The chemical can be quite as well a sulfate or acetate or any other suitable salt with just minimal difference of its properties, therefore I chose to omit the anion. --Shaddack 09:40, 4 October 2006 (UTC)

New Photo Matching Service[edit]

Hi there,

I'm contacting you because you listed yourself at Wikipedia:Wikipedians/Photographers. You might be interested in a new wikiproject page that lists photographers and articles that need photos by location. The page is located at Wikipedia:Photo Matching Service or WP:PMS GabrielF 00:40, 1 December 2006 (UTC)

Barnstar award[edit]

Original Barnstar.png The Original Barnstar
In recognition of contributions to concrete and similar fine work. Walter Siegmund (talk) 19:24, 8 January 2007 (UTC)

thanX for gliotoxin[edit]

I came to thank you for editing GLIOTOXIN, but now I admire your contribution to chemistry AbuAmir 19:16, 11 January 2007 (UTC)

Image:Myreth sulfate.gif listed for deletion[edit]

An image or media file that you uploaded or altered, Image:Myreth sulfate.gif, has been listed at Wikipedia:Images and media for deletion. Please look there to see why this is (you may have to search for the title of the image to find its entry), if you are interested in it not being deleted. Thank you. —Bkell (talk) 00:49, 21 March 2007 (UTC)

Image:1(5-tetrazolyl)-4-guanyl tetrazene hydrate.png[edit]

Hi Shaddack. Could you please check if this structure is correct? It is used in the article tetrazene (CAS: 31330-63-9), where this PubChem link is given. Possibly it's used in this article in error. Thanks in advance. --Leyo 17:18, 3 April 2007 (UTC)

Maybe, I was not clear enough. Your structure is not the same as in PubChem or in ChemFinder for the CAS 31330-63-9, but it is used in the same box as this CAS. Could you check that please? Thanks. --Leyo 23:07, 17 April 2007 (UTC)
I see the issue now, thanks for pointing me at it. It appears I made a serious screwup. The new corrected structure is uploaded and the SMILES string is corrected. You're welcome, and thanks for catching my mistake! --Shaddack 06:40, 18 April 2007 (UTC)
I don't see any difference in the newly uploaded structure compared to the old one. I don't know if this is a problem of the server. --Leyo 12:02, 18 April 2007 (UTC)
The structures differ in position of a nitrogen in the chain and a hydrogen atom in the pentacycle. Check if the old image is not cached somewhere along the way. It works for me. --Shaddack 18:27, 18 April 2007 (UTC)
Indeed, the cache was the problem. Yes, the structure is correct now. Thanks a lot. --Leyo 19:16, 18 April 2007 (UTC)

do you know if the ion exchange resin can act as a catalyst to isomerize c-16 or c-18 olefins?

Solvent over-enthusiasm?[edit]

Hi there. My guess is that others chem editors are wondering the same thing: I am a little surprised by your categorizing a lot of compounds as solvents. Now in principle, virtually anything is a a solvent (I have used molten NaCl, for example). So I am kind of wondering where you might be going with your new-found enthusiasm for solvents. There is probably a tacit understanding that this category would be reserved for common solvents in the lab or industry. Triethylenetetramine???? A proposed set of changes that affect many compounds would be usefully disclosed and discussed at Wikipedia talk:WikiProject Chemicals. Thanks.--Smokefoot 02:57, 11 November 2007 (UTC)

Well, the mentioned TETA was originally in an article together with DETA which I made. DETA is AFAIK used for extractions in oil industry. However during the splitting the categories were kept. Now I was splitting the solvents by chemical structure, and the cat sorta stuck there. Sorry, correcting. --Shaddack 08:07, 11 November 2007 (UTC)


.. da man :) chini (talk) 23:30, 17 February 2008 (UTC)

AfD nomination of Cocamide TEA[edit]

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An article that you have been involved in editing, Cocamide TEA, has been listed for deletion. If you are interested in the deletion discussion, please participate by adding your comments at Wikipedia:Articles for deletion/Cocamide TEA. Thank you. Do you want to opt out of receiving this notice? Iain99Balderdash and piffle 11:51, 22 May 2008 (UTC)

Not contested, based on the AfD reviews. Too late to contest anyway. --Shaddack (talk) 18:23, 25 May 2008 (UTC)

Category:Food antioxidants[edit]

Hi there -- I just removed Category:Food antioxidants from Category:Nutrients. You didn't really mean to put it there, did you? It caught my eye because of Category:Dietary antioxidants -- which you also, properly, placed there, on the same day. I'm guessing that this was merely an inadvertent mistake. Anyhow, I don't think preservatives should ever come under the heading of "nutrients". Hopefully, we are in agreement on that! Regards, Cgingold (talk) 13:52, 26 May 2008 (UTC)

Well done. Including keeping the link to the other category in the top of the page. This is how wiki should work. Thanks for correction. --Shaddack (talk) 10:47, 1 June 2008 (UTC)

Typo redirect Pelagir[edit]

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Permission to reproduce[edit]

Dear Shaddack,

in our new schoolbook we would like to reproduce a photo from you. It is "Microphoto-butterflywing2". We need your permission for the use of the image. Please contact me for the details. Thank you and

kind regards Christin Sperling —Preceding unsigned comment added by (talk) 11:46, 20 June 2008 (UTC)

WikiProject Explosives[edit]

Hello, WikiProject Explosives has been launched. Feel free to sign up as a member and provide input in reference to priorities for improvement of Wikipedia's explosives-related articles. Thanks, EVCM (talk) 18:53, 28 August 2008 (UTC)


I thought you would enjoy seeing the PFOS page now considering your discussions on the talk page. I have put in most of my time at the PFOA page, however. Thanks. -Shootbamboo (talk) 05:05, 2 November 2008 (UTC)

Fluorescent Dyes[edit]

Hi Shaddack,

I came across a few of your articles on Fluorescernt dyes. I have a product I'm working on that will require that I can apply a fluorescent dye to Cyanoacrylate (super glue), so that when combined, the two materials will be able to polymerize at the same time when heated into a fume. This combined material will be impregnated into steel wool pellets and then heated in a special torch until it fumes. The fumes will then be used to "lift" latent prints, that can then be examined under polarized light. We have not been able to find an existing dye that would be compatible with cynoacrylate. Can you help?

Arnold Schwartz68.199.9.104 (talk) 19:54, 11 December 2008 (UTC)

50 Cent Party[edit]

Hi Shaddack! I made some comments at the article talk page and edited Web brigades also. You are very welcome to contribute. But one has to be very careful with such materials, as one can see here. You might also look at this recent debate. Thanks. Biophys (talk) 22:15, 11 January 2009 (UTC)

Note that my last edit in Web brigades was reverted exactly in three minutes [4] and note who made this revert.Biophys (talk) 22:20, 11 January 2009 (UTC)

Question regarding your wiki edit on graphite[edit]

On the Graphite entry you made an edit stating that the use of graphite is limited by its tendancy to cause pitting corrosion in stainless steel. I am working on a project to use a graphite lubricant on ferritic stainless steel so naturally this comment concerns me. I've done some brief internet research and cannot find any other evidence to support this statement. Can you please some background on why you think this is the case?

Thanks —Preceding unsigned comment added by (talk) 20:20, 22 January 2009 (UTC)

Brief search done. Sources added. Good enough or want better? --Shaddack (talk) 21:23, 22 January 2009 (UTC)

Media:Headline textBold text[edit]

Crystal oscillator[edit]

I noticed you added the table in the Crystal oscillator page. I was wondering if you could add 33.33 MHz and 40 MHz since they are mentioned as common in the article but they are not on the list. what are they even for? 06:51, 3 March 2009 (UTC)

Are you going to put in all 400 frequencies in the Digi Key catalog? I don't think we need every frequency ever made listed in the article, especially while it lacks discussion of temperature coefficients, the history of the various crystal cutss, uses in radio, and many other facts more suitable to an encyclopedia than a parts catalog. Please don't add more frequencies, the user gets the idea after the first 30 or 40. --Wtshymanski (talk) 15:10, 23 December 2009 (UTC)
Some of the 400 are fairly unimportant, and some are custom-made for specific and minor application. I would however suggest to split off the table into a separate article. --Shaddack (talk) 18:44, 23 December 2009 (UTC)

Metastable intermolecular composite[edit]

Hi Shaddack — I'd suggest to move Metastable intermolecular composite to Nano-thermite. The article, as of this moment, is about metallic nano-scale energetic materials, which are not necessarily intermolecular (in fact, the Al is not a molecule). They differ from most high explosives by being a mixture of two (or more) substances, but this is not sufficient to define them. We could of course have another article about the larger class of metastable intermolecular composites. What do you think about a possible move? — Regards.  Cs32en  21:47, 4 May 2009 (UTC)

I don't really care under which title the substances are. Let's go for nanothermites, MIC as a redirect to them for now, and if you please could, write (or get somebody else to write) more about both nanothermites and MICs. --Shaddack (talk) 21:48, 8 May 2009 (UTC)


Hi Shaddack, you left me a message on phosphors in my talk page. I left a reply there, but I don't know how to notify you of the answer, so once you read this, just delete the message :) REGARDS! Alchaemist (talk) 05:32, 18 June 2009 (UTC)

CfD nomination of Category:Soldering[edit]

I have nominated Category:Soldering (edit | talk | history | links | watch | logs) for renaming to Category:Brazing and soldering (edit | talk | history | links | watch | logs). Your opinions on the matter are welcome; please participate in the discussion by adding your comments at the discussion page. Thank you. Wizard191 (talk) 17:57, 24 July 2009 (UTC)

goretext photo[edit]

Hi, I've tagged image commons:File:Goretex photo.gif that you originally uploaded in 2005 as missing source information, because the commons version now links to local version and local version no longer exists, so it's hard to find out whether it actually is GFDL. Can you please specify the source on the Commons page, if possible? Thanks --che (cs:talk) 21:01, 4 August 2009 (UTC)

I honestly have no idea. I think I took it from another wikipedia (German? Or so?) but I may be wrong. --Shaddack (talk) 00:19, 9 August 2009 (UTC)

NowCommons: File:CIC-USS-CarlVinson-2001.jpg[edit]

File:CIC-USS-CarlVinson-2001.jpg is now available on Wikimedia Commons as Commons:File:CIC-USS-CarlVinson-2001.jpg. This is a repository of free media that can be used on all Wikimedia wikis. The image will be deleted from Wikipedia, but this doesn't mean it can't be used anymore. You can embed an image uploaded to Commons like you would an image uploaded to Wikipedia, in this case: [[File:CIC-USS-CarlVinson-2001.jpg]]. Note that this is an automated message to inform you about the move. This bot did not copy the image itself. --Erwin85Bot (talk) 04:42, 4 September 2009 (UTC)

Crystal oscillator and crystal cuts[edit]

Thanks so much for the material on crystal cuts. I think this makes the article much broader and more useful, since that whole area had been neglected up to your addition. I think Wikipedia articles are more encyclopediac when they give a broad view of a topic, rather than extensively listing minor variations. --Wtshymanski (talk) 03:47, 28 December 2009 (UTC)

Service awards proposal[edit]

Master Editor Hello, Shaddack! I noticed you display a service award, and would like to invite you to join the discussion over a proposed revamping of the awards.

If you have any opinions on the proposal, please participate in the discussion. Thanks! — the Man in Question (in question) 04:06, 8 January 2010 (UTC)

Barnstar for hot melt adhesive[edit]

Barnstar-lightbulb3.png The Technology Barnstar
Thanks for your great work at expanding hot melt adhesive! Wizard191 (talk) 20:11, 19 January 2010 (UTC)


is a featured article meaning any indiscriminate dumping there of unreferenced information (or referenced to unreliable sources) may be reverted on the spot. Materialscientist (talk) 23:39, 24 January 2010 (UTC)

I have commented out the Pu-U-xxx alloys in the text because I couldn't quickly find the references for that part and thought you can do that much quicker. Materialscientist (talk) 05:30, 27 January 2010 (UTC)

Pit (nuclear weapon)[edit]

I saw the Pit (nuclear weapon) article you started. Very interesting and nicely done! I have read a lot about the Manhattan Project, but this has technical stuff I had never run across before. CosineKitty (talk) 16:01, 11 February 2010 (UTC)

DYK for Uranium hydride[edit]

Updated DYK query On February 16, 2010, Did you know? was updated with a fact from the article Uranium hydride, which you created or substantially expanded. You are welcome to check how many hits your article got while on the front page (here's how, quick check ) and add it to DYKSTATS if it got over 5,000. If you know of another interesting fact from a recently created article, then please suggest it on the Did you know? talk page.

Ucucha 18:16, 16 February 2010 (UTC)

Chernobyl disaster edits[edit]

Wow, impressive work on the Chernobyl disaster. I read and re-read the page every year or so. Would you mind clarifying this part for me?

"The role of the graphite section, known as "displacer", is to augment the difference between the neutron flux attenuation with inserted and retracted rods, as the graphite displaces water that would otherwise act as neutron absorber, although way weaker than boron carbide. When the control rod is fully retracted, the graphite displacer is located in the middle of the core height, with 1.25 meters of water at its each end."

I know that this graphite displacer is one of the primary causes of the meltdown and why but I do not understand that part of the paragraph, which attempts to explain why it was there in the first place. So can you re-explain why the designers put it in? Isn't graphite a neutron moderator? Why was a piece of graphite which increases reaction rate used on a control rod, the purpose of which is to decrease reaction rates? Thanks!

-- Lev

I saw your question in passing,and thought I would answer it. First, any neutron modifier is also a neutron poison, and vice versa. Graphite absorbs neutrons as well as moderating them; it simply absorbs fewer than does water. So a graphite "extension" to a control rod essentially amplifies the reactivity of the rod, meaning you need fewer (or smaller) rods to control the pile -- as you extract the rod, you replace a very strong neutron poison (B4C), with a good moderator (carbon). Without the shim, you're replacing the rod with the cooling water around it. Of course, if the shim is too short (as it was in pre-Chernobyl RBMK designs), your initial insert of a rod winds up briefly increasing reactivity, rather than decreasing it.

Regards. Fell Gleaming(talk) 05:29, 19 April 2010 (UTC)

Butterfly wing photos[edit]

Hi, I am very interested in learning about how you made the microphotos of butterfly wings. In particular, what kind of microscope and camera were you using? If you are able to assist, I'd love some pointers as to how to create a similar set up for myself.

Thanks, —Preceding unsigned comment added by (talk) 01:22, 9 March 2010 (UTC)

lock decoder picture..[edit]

Hi, I am a locksmith and safe engineer based in the UK. I saw your lock decoder picture, interesting, is this your tool?

best regards, St.john —Preceding unsigned comment added by Stjohngoldfinger4 (talkcontribs) 23:52, 31 March 2010 (UTC)


Where can I get a specimen of Trinitite like the one in the picture you posted to Wiki? - Thanks...Brent Van ALlen —Preceding unsigned comment added by (talk) 15:54, 3 April 2010 (UTC)

I got mine from eBay. Was a lucky find. is selling some too. --Shaddack (talk) 05:31, 19 April 2010 (UTC)

Deaths due to the Chernobyl disaster[edit]

Hi, it is improper to move a page against consensus. If you wish to move this entry, please start a movereq process and obtain consensus. I can explain the process to you if you wish. Fell Gleaming(talk) 05:01, 19 April 2010 (UTC)

Well, you split off the section, renamed it according to your own idea, and now are insisting on changing the scope of what was essentially my work. Why involving bureaucracy when the problem is clear? The table has a wider scope than just the dead, see its talk page and the header of the section in the article it was in originally. I agree with moving it to a separate page, but I want the original scope preserved. --Shaddack (talk) 05:28, 19 April 2010 (UTC)

Heat-shrink tubing[edit]

You have been mentioned in a discussion at Talk:Heat-shrink tubing#Commercial links. SpinningSpark 08:52, 16 May 2010 (UTC)

Thanks :) Looks like no good work can go unpunished. :P --Shaddack (talk) 13:51, 16 May 2010 (UTC)

Wikipedia:Featured picture candidates/ButterflyScaleMicroscopy: Promotion of Set[edit]

An image created by you has been promoted to featured picture status
Your image, File:Microphoto-butterflywing.jpg, was nominated on Wikipedia:Featured picture candidates, gained a consensus of support, and has been promoted. If you would like to nominate an image, please do so at Wikipedia:Featured picture candidates. Thank you for your contribution! NauticaShades 19:20, 1 June 2010 (UTC)


Nice work. I'm learning to braze right now, and hopefully I'll become good enough to need all that info. Keep it up. - Peregrine Fisher (talk) 03:03, 18 June 2010 (UTC)

You're welcome :) Some additions written. --Shaddack (talk) 15:43, 22 June 2010 (UTC)

Hello! One of your edits to Brazing introduced a ref name of "lmsilv" (on the table item "Premabraze 631") but did not add a ref with that name. Could you please add in the source you had intended? Thanks. - Salamurai (talk) 02:45, 22 June 2010 (UTC)

Oops. Corrected! --Shaddack (talk) 15:43, 22 June 2010 (UTC)

You are now a Reviewer[edit]

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Hello. Your account has been granted the "reviewer" userright, allowing you to review other users' edits on certain flagged pages. Pending changes, also known as flagged protection, is currently undergoing a two-month trial scheduled to end 15 August 2010.

Reviewers can review edits made by users who are not autoconfirmed to articles placed under pending changes. Pending changes is applied to only a small number of articles, similarly to how semi-protection is applied but in a more controlled way for the trial. The list of articles with pending changes awaiting review is located at Special:OldReviewedPages.

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If you do not want this userright, you may ask any administrator to remove it for you at any time. Courcelles (talk) 18:31, 19 June 2010 (UTC)

Green diesel[edit]

Hi, Shaddack. There is a discussion to merge Green diesel article with Vegetable oil refining and/or Biomass to liquid articles. As one of the main editors of the biomass to liquid article, your input is highly appreciated. Beagel (talk) 09:24, 28 August 2010 (UTC)

Mercury arc valves[edit]

You may want to comment here: Talk:Mercury arc valve#Explosion hazard. -- Petri Krohn (talk) 07:20, 4 September 2010 (UTC)

Thanks! What's a good enough reference when Alfven's own words quoted by NASA aren't sufficient? --Shaddack (talk) 20:01, 4 September 2010 (UTC)

Chemical Applications[edit]

Hi Shaddack - thanks for all of your contributions. I'm a chemist myself and you inspire me. I'm just wondering how you know the applications for thiodiglycol (and other chemicals). How did you learn about, for example, that it is used in pesticides in the first place?

Thanks for your help Clearchemistry (talk) 21:57, 11 September 2010 (UTC)Clearchemistry

Categories for discussion nomination of Category:Metal plating[edit]

Info talk.png

Category:Metal plating, which you created, has been nominated for deletion, merging, or renaming. If you would like to participate in the discussion, you are invited to add your comments at the category's entry on the Categories for discussion page. Thank you. Wizard191 (talk) 12:26, 5 October 2010 (UTC)


Hey there Shaddack

I deleted this image you uploaded, because it was interfering with the chembox on choline. I know I'm being a little bold, but the image was unused, and it was made to 2005 standards. Since then, other contributors have uploaded equivalent images which meet current standards.

Nevertheless, I wanted to ask if you wanted me to re-upload your image anywhere. Thanks. --Rifleman 82 (talk) 06:05, 30 October 2010 (UTC)

Snad bys mohl pomoci[edit]


na den výročí americké dospělosti naší "Velvet revolution" jsem o tobě (snad nevadí, že tykám) viděl dokument. A velmi mě zaujalo to co děláš a co dokážeš. Potřeboval bych s něčím pomoci. Nechci o tom psát, neboť "Big brother is watching you". Nevím jak by to šlo udělat jinak. V případě, že bys mi chtěl poradit, aniž bys tušil o co jde, tak se prosím tě ozvi na můj mail. Určitě znáš bezpečnější způsob jak mě kontaktovat. Předem díky a kdyby nic tak hodně štěstí, síly a entuziasmu.

S pozdravem lama —Preceding unsigned comment added by (talk) 21:15, 18 November 2010 (UTC)


Wikipedia Autopatrolled.svg

Hello, this is just to let you know that I have granted you the "autopatrolled" permission. This won't affect your editing, it just automatically marks any page you create as patrolled, benefiting new page patrollers. Please remember:

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If you have any questions about the permission, don't hesitate to ask. Otherwise, happy editing! Acalamari 21:45, 24 January 2011 (UTC)

Nomination of Hot particle for deletion[edit]

A discussion is taking place as to whether the article Hot particle is suitable for inclusion in Wikipedia according to Wikipedia's policies and guidelines or whether it should be deleted.

The article will be discussed at Wikipedia:Articles for deletion/Hot particle until a consensus is reached, and anyone is welcome to contribute to the discussion. The nomination will explain the policies and guidelines which are of concern. The discussion focuses on good quality evidence, and our policies and guidelines.

Users may edit the article during the discussion, including to improve the article to address concerns raised in the discussion. However, do not remove the article-for-deletion template from the top of the article. meco (talk) 09:53, 15 March 2011 (UTC)

Custodial Detention Index[edit]

nice work Decora (talk) 20:03, 23 April 2011 (UTC)


Hi Shaddack, good job for the chemistry articles! Would you mind taking a look at the very first article I just have created on Cerimetry? It is still a temporary subpage (not published yet); I've just created the page today. Your contribution would be appreciated. Thanks a lot in advance, Burgundy111 —Preceding undated comment added 23:27, 6 May 2011 (UTC).

Proposed Image Deletion[edit]

A deletion discussion has just been created at Category talk:Unclassified Chemical Structures, which may involve one or more orphaned chemical structures, that has you user name in the upload history. Please feel free to add your comments.  Ronhjones  (Talk) 23:06, 10 June 2011 (UTC)

Proposed deletion of Materials for use in vacuum[edit]

Ambox warning yellow.svg

The article Materials for use in vacuum has been proposed for deletion because of the following concern:

how-to guide

While all contributions to Wikipedia are appreciated, content or articles may be deleted for any of several reasons.

You may prevent the proposed deletion by removing the {{proposed deletion/dated}} notice, but please explain why in your edit summary or on the article's talk page.

Please consider improving the article to address the issues raised. Removing {{proposed deletion/dated}} will stop the proposed deletion process, but other deletion processes exist. In particular, the speedy deletion process can result in deletion without discussion, and articles for deletion allows discussion to reach consensus for deletion. — RHaworth (talk · contribs) 21:44, 8 August 2011 (UTC)

One of the more ignorant PRODs I've seen.
Thanks for this article - vacuum engineering is very sparsely covered as yet. Andy Dingley (talk) 18:35, 9 August 2011 (UTC)

Speedy deletion nomination of flame retardants[edit]

A tag has been placed on flame retardants, requesting that it be speedily deleted from Wikipedia. This has been done for the following reason:

: Tricky use of Typographic ligature (fl-sign)

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If you think that this notice was placed here in error, contest the deletion by clicking on the button labelled "Click here to contest this speedy deletion". Doing so will take you to the talk page where you will find a pre-formatted place for you to explain why you believe the page should not be deleted. You can also visit the page's talk page directly to give your reasons, but be aware that once tagged for speedy deletion, if the page meets the criterion, it may be deleted without delay. Please do not remove the speedy deletion tag yourself, but don't hesitate to add information to the page that would render it more in conformance with Wikipedia's policies and guidelines. If the page is deleted, you can contact one of these administrators to request that the administrator userfy the page or email a copy to you. Grashoofd (talk) 19:10, 11 January 2012 (UTC)

Invitation to events: bot, template, and Gadget makers wanted[edit]

I thought you might want to know about some upcoming events where you can learn more about MediaWiki customization and development, extending functionality with JavaScript, the future of ResourceLoader and Gadgets, the new Lua templating system, how to best use the web API for bots, and various upcoming features and changes. We'd love to have power users, bot maintainers and writers, and template makers at these events so we can all learn from each other and chat about what needs doing.

Check out the Chennai event in March, the Berlin hackathon in June, the developers' days preceding Wikimania in July in Washington, DC, or any other of our events.

Best wishes! - Sumana Harihareswara, Wikimedia Foundation's Volunteer Development Coordinator Sumanah (talk) 14:36, 16 February 2012 (UTC)


Shaddack, why are you no longer on PhantasyWorld?! :'( Miss you — Preceding unsigned comment added by (talk) 01:21, 27 May 2012 (UTC)

How long did it take you to write the crystal oscillator frequency article?[edit]

Sagittarian Milky Way (talk) 20:13, 16 December 2012 (UTC)

Difficult to say. It was a piece here, a piece there, the best guess could be "few nights". The list of crystals at my local electronics vendors was bugging me for long enough to take them one by one, and looking up where their frequencies were mentioned in schematics and various documents. Same for other crystals I found in various gadgets I took apart. --Shaddack (talk)

Category:Persistent organic pollutants[edit]

Category:Persistent organic pollutants, which you created, has been nominated for possible deletion, merging, or renaming. If you would like to participate in the discussion, you are invited to add your comments at the category's entry on the Categories for discussion page. Thank you. Leyo 16:39, 8 January 2013 (UTC)

Czech help needed[edit]

Hello Shaddack, I'm contacting you because we need some Czech translators to help with the deployment of the new VisualEditor on cs.wikipedia. There are help pages, user guides, and description pages that need translating, as well as the interface itself. The translating work is going on over on MediaWiki: Translation Central. I also need help with a personal message for the Czech Wikipedians. If you are able to help in any way, either reply here, or head over to TranslationCentral. Thanks for your time, PEarley (WMF) (talk) 23:51, 13 September 2013 (UTC)

Proposed deletion of Content rating[edit]

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The article Content rating has been proposed for deletion because of the following concern:

Biased, unreferenced, written like an essay.

While all constructive contributions to Wikipedia are appreciated, content or articles may be deleted for any of several reasons.

You may prevent the proposed deletion by removing the {{proposed deletion/dated}} notice, but please explain why in your edit summary or on the article's talk page.

Please consider improving the article to address the issues raised. Removing {{proposed deletion/dated}} will stop the proposed deletion process, but other deletion processes exist. In particular, the speedy deletion process can result in deletion without discussion, and articles for deletion allows discussion to reach consensus for deletion. 2602:3F:9866:CC00:BA97:5AFF:FE04:D3D9 (talk) 18:17, 29 September 2013 (UTC)

Information or reference to article: Pyrotechnic fastener[edit]

Dear Shaddack,

I saw you edited the article Pyrotechnic fastener#Compositions_used. I'm especially interested in the following point:

   * RDX/nitrocellulose: gas generator, unsuitable for deep space missions, burn rate dependent on pressure.

Though searching in several books and in the internet, I couldn't find another statement that would support this. I am very happy, if you could give some explanations or references to this topic.

Thank you very much in advance for your help!

Best Regards


S.G.HvW (talk) 14:17, 21 October 2013 (UTC)

Speedy deletion nomination of Naomi Internet Filter[edit]

If this is the first article that you have created, you may want to read the guide to writing your first article.

You may want to consider using the Article Wizard to help you create articles.

A tag has been placed on Naomi Internet Filter, requesting that it be speedily deleted from Wikipedia. This has been done under section G11 of the criteria for speedy deletion, because the page seems to be unambiguous advertising which only promotes a company, product, group, service or person and would need to be fundamentally rewritten in order to become encyclopedic. Please read the guidelines on spam and Wikipedia:FAQ/Organizations for more information.

If you think this page should not be deleted for this reason, you may contest the nomination by visiting the page and clicking the button labelled "Click here to contest this speedy deletion". This will give you the opportunity to explain why you believe the page should not be deleted. However, be aware that once a page is tagged for speedy deletion, it may be removed without delay. Please do not remove the speedy deletion tag from the page yourself, but do not hesitate to add information in line with Wikipedia's policies and guidelines. If the page is deleted, and you wish to retrieve the deleted material for future reference or improvement, you can place a request here. —Unforgettableid (talk) 23:57, 31 October 2013 (UTC)

Nomination of Naomi Internet Filter for deletion[edit]

A discussion is taking place as to whether the article Naomi Internet Filter is suitable for inclusion in Wikipedia according to Wikipedia's policies and guidelines or whether it should be deleted.

The article will be discussed at Wikipedia:Articles for deletion/Naomi Internet Filter (2nd nomination) until a consensus is reached, and anyone is welcome to contribute to the discussion. The nomination will explain the policies and guidelines which are of concern. The discussion focuses on high-quality evidence and our policies and guidelines.

Users may edit the article during the discussion, including to improve the article to address concerns raised in the discussion. However, do not remove the article-for-deletion notice from the top of the article. —Unforgettableid (talk) 03:19, 4 November 2013 (UTC)

Category:Nuclear research centers[edit]

Category:Nuclear research centers, which you created, has been nominated for possible deletion, merging, or renaming. If you would like to participate in the discussion, you are invited to add your comments at the category's entry on the Categories for discussion page. Thank you. DexDor (talk) 18:50, 12 October 2014 (UTC)

Incandescent light bulb[edit]

Especially in a mature, longstanding article, additions such as your recent ones need inline references to reliable sources to satisfy verifiability. You recently added some information to that article regarding gas and vacuum in incandescent bulbs. Would you kindly add inline references to the statements you added, to verify the material? It sounds right, in general, but where did you find the information? Regards, Edison (talk) 16:15, 4 February 2015 (UTC)

All the information is from the "R.C. Ropp - The Chemistry of Artificial Lighting Devices - Lamps, Phosphors and Cathode Ray Tubes", linked to google books from the beginning of the itemized list. I have to run now, so cannot give it the necessary attention myself at this very moment, and I also went out of practice, so please do whatever you consider the best and I'll watch your hands and learn/refresh. Shaddack (talk) 16:54, 4 February 2015 (UTC)