Deuterium-depleted water

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Deuterium-depleted water (DDW), also known more ambiguously as light water,[1] is water which has a lower concentration of deuterium than occurs naturally. Deuterium a heavier isotope of hydrogen which has, in addition to its one proton, a neutron, that roughly doubles the mass of the hydrogen atom.

In Vienna Standard Mean Ocean Water, deuterium occurs at a rate of 155.76 ppm. The production of heavy water involves isolating and removing deuterium within water. The by-product of this process is light water. Production of light water can result during electrolysis, distillation, and desalination. It can also be produced directly using the Girdler sulfide process.[1]

Experiments have shown that consumption of light water may be beneficial as an adjunct to chemotherapy. A 1999 Romanian study found that water with only 30 ppm deuterium produced marked improvement in survival rates of mice bombarded with ionizing radiation.[2] A study of four patients with brain metastases from lung cancer found a three-month regimen of light water "noticeably prolonged" their survival time.[3] A 2010 Hungarian study found significant improvement in the survival times of prostate cancer patients treated with light water.[4] Despite Gilbert Lewis' call in 1934 for such experiments.,[5] research on the effects of deuterium-depletion on living cells has been very limited with less than a dozen peer-reviewed research papers available via PubMed in mid-2011[6]

Depleted water (125 ppm deuterium corresponds to the deuterium:protium ratio D:H=1:7695) at a consumption as high as 2 litres per day can influence the deuterium concentration in human body (average 40 litres with deuterium:protium ratio about D:H = 1:6418) for less than 1% (decreasing the normal ratio to D:H = 1:6472). A 1963 American paper is reported to infer that no biological effect should be expected at this level, [7] though new researches are currently carried on in eastern Europe.

See also[edit]

References[edit]

  1. ^ a b Boyle, Rebecca (6 Jan 2011). "With New Method, China Can Mass-Produce Light Water For Its Citizens' Thirst". Popular Science. Retrieved 7 Jan 2011. 
  2. ^ Bild, W; Stefanescu, I; Haulica, I; Lupuşoru, C; Titescu, G; Iliescu, R; Nastasa, V (1999). "Research concerning the radioprotective and immunostimulating effects of deuterium-depleted water". Romanian journal of physiology 36 (3-4): 205–18. PMID 11797936. 
  3. ^ Krempels, Krisztina; Somlyai, Ildikó; Somlyai, Gábor (2008). "A Retrospective Evaluation of the Effects of Deuterium Depleted Water Consumption on 4 Patients with Brain Metastases from Lung Cancer". Integrative Cancer Therapies 7 (3): 172–81. doi:10.1177/1534735408322851. PMID 18815148. 
  4. ^ Somlyai, Gábor; Molnár, Miklós; Laskay, Gábor; Szabó, M; Berkényi, Tamás; Guller, Imre; Kovács, András (2010). "A természetben megtalálható deutérium biológiai jelentősége: a deutériumdepletio daganatellenes hatása" [Biological Significance of Naturally Occurring Deuterium: the Antitumor Effect of Deuterium Depletion]. Orvosi Hetilap (in Hungarian) 151 (36): 1455–60. doi:10.1556/OH.2010.28865. PMID 20739263. 
  5. ^ Lewis, G. N. (1934). "THE BIOLOGY OF HEAVY WATER". Science 79 (2042): 151–153. Bibcode:1934Sci....79..151L. doi:10.1126/science.79.2042.151. PMID 17788137.  edit
  6. ^ Koch, Steven J. (4 March 2011). "I am maximally-skeptical that there currently exists any evidence that drinking deuterium-depleted water has health benefits or will cure disease". Blogspot.com. Retrieved 22 July 2011. 
  7. ^ Thompson, J.F.: Biological effects of deuterium, Pergamon Press, New York 1963.