Navigation Links
Water quality in orbit

ck to Earth. Porter says required biocide levels in drinking water are 0.1 to 1 part per million silver and 0.1 to 5 parts per million iodine.

How It Works

To test whether drinking water is adequately disinfected, space station astronauts will collect galley water in sealed plastic bags, and then use syringes to remove some water from the bags and push it through a cartridge that contains a half-inch-diameter, polymer, porous-membrane disk impregnated with a chemical to detect either iodine or silver. The disks, known as "solid phase extraction membranes," capture either iodine or silver, depending on the chemical in the disk.

Next, the bottom half of the cartridge, which contains the disk, is placed against a German company's handheld "diffuse reflectance spectrometer," which shines light on the disk so it can read the disk's color in about two seconds. Porter says the device was developed to measure the reflectivity or gloss, and thus the quality, of finishes such as automotive paint, industrial surfaces, stainless steel and decorative metals.

Each handheld device two are in the kit taken to the space station weighs 1.1 pounds, runs on four AA batteries, has a readout screen and measures 7 inches by 3.7 inches by 3.2 inches.

To test for iodine, the disk is impregnated with PVP (polyvinylpyrrolidone), a nontoxic chemical in contact lens cleaning solutions. The PVP reacts with iodine, and the intensity of the resulting yellow color reveals the concentration of iodine in the water.

To test for silver in water, the disk is imbued with DMABR, which is short for 5-(dimethylaminobenzylidene)rhodanine. A yellowish color indicates silver is absent, while flesh to brighter pink reveals how much silver is present.

"We can do this whole analysis in about two minutes on the ground or in space," Porter says.


Contact: Lee Siegel
University of Utah

Page: 1 2 3 4

Related biology news :

1. Freshwater supplies threatened in central Pacific
2. University of Oregon researcher finds that on waters surface, nitric acid is not so tough
3. Innovative civil engineering application promises cleaner waters
4. Safe water: simpler method for analyzing radium in water samples cuts testing time
5. Researchers find new taste in fruit flies: carbonated water
6. Low oxygen in coastal waters impairs fish reproduction
7. Extra gene copies were enough to make early humans mouths water
8. Acid rain has a disproportionate impact on coastal waters
9. HARDY rice: less water, more food
10. New microsensor measures volatile organic compounds in water and air on-site
11. Alternative methods proposed to detect pesticides and antibiotics in water and natural food
Post Your Comments:
Related Image:
Water quality in orbit
(Date:9/18/2014)... ever starts a "frequent flyers" program, fruit flies surely ... laboratory has hosted increasing numbers of fruit fly research ... station in April, and another is scheduled launch to ... to launch in December. , Fruit flies are biomedical ... in space. Model organisms can reveal the basis for ...
(Date:9/18/2014)... built the first smartphone app that automatically reveals ... In other words, your smartphone knows your state ... and how that affects you. , The StudentLife ... loneliness to their academic performance, also may be ... to monitor mental health, trigger intervention and improve ...
(Date:9/18/2014)... rabbitfish which have devastated algal forests in the eastern ... Mediterranean basin if their distribution continues to expand as ... by an international team of researchers led by Dr ... of the Mediterranean Institute for Advanced Studies in Spain, ... Members of the team surveyed more than 1000 kilometres ...
Breaking Biology News(10 mins):Buzzing with activity: Fruit flies orbit Earth for science 2Buzzing with activity: Fruit flies orbit Earth for science 3Buzzing with activity: Fruit flies orbit Earth for science 4New Dartmouth smartphone app reveals users' mental health, performance, behavior 2New Dartmouth smartphone app reveals users' mental health, performance, behavior 3New Dartmouth smartphone app reveals users' mental health, performance, behavior 4Tropical fish a threat to Mediterranean Sea ecosystems 2
... suggested that Alzheimer's disease patients with genetically modified tissue ... the rate of cognitive decline and increased metabolic activity ... the April 24, 2005 online issue of the journal ... San Diego (UCSD) School of Medicine. , PET scans ...
... alarmed Americans when it made its first U.S. appearance ... spread from coast to coast, sickened more than 16,000 ... spread, medical investigators hastened research to develop an effective ... published paper by researchers at Washington University in St. ...
... led by Dr. Kuniya Abe from the RIKEN BioResource ... comprehensive genome-wide experimental analyses of sense-antisense transcripts to date. ... the journal Genome Research. , Sense-antisense transcripts, or SATs, ... strands at the same locus. The number of SATs ...
Cached Biology News:Alzheimer's cognitive decline slowed 2Alzheimer's cognitive decline slowed 3Promising new West Nile therapy cures disease in mice 2Researchers rein in regulatory RNAs 2
(Date:9/18/2014)... Bryan-College Station, Texas (PRWEB) September 18, 2014 ... University System Chancellor John Sharp, Texas A&M Health ... from the U.S. Department of Health and Human ... GSK today dedicated a national pandemic influenza vaccine ... will serve as an anchor for the Texas ...
(Date:9/18/2014)... -- Research and Markets has announced the ... Industry Report, 2014-2017" report to their offering. ... can differentiate into specialized cells and can divide (through ... can be applied to treatment of cardiovascular diseases, leukemia ... damage or lesion of liver, kidney and other parenchymal ...
(Date:9/18/2014)... 18, 2014 Research and Markets ... Albumin Industry Report 2014" report to their offering. ... 2014 is a professional and in-depth study on the ... The report provides a basic overview of the ... The human albumin market analysis is provided for the ...
(Date:9/18/2014)... Leatherwood Plastics has selected Vycom’s Flametec ... competitive in the semiconductor, clean room and medical ... product quality and productivity, according to Dwight Leatherwood, ... 1980 in Lewisville, TX, Leatherwood Plastics ... the business. Much of Leatherwood’s equipment building relies ...
Breaking Biology Technology:Texas A&M Dedicates National Pandemic Influenza Vaccine Manufacturing Facility, on Track for 2016 Start-Up Phase 2Texas A&M Dedicates National Pandemic Influenza Vaccine Manufacturing Facility, on Track for 2016 Start-Up Phase 3Texas A&M Dedicates National Pandemic Influenza Vaccine Manufacturing Facility, on Track for 2016 Start-Up Phase 4Global and Chinese Stem Cell Industry Report, 2014-2017 2Global and Chinese Stem Cell Industry Report, 2014-2017 3Global Human Albumin Industry Report 2014 2Global Human Albumin Industry Report 2014 3Leatherwood Plastics Selects Vycom’s Flametec PVC-C Material to Stay Competitive in Semiconductor and Lab Equipment Industries 2
... WITTEN, Germany, September 8 On Wednesday, August 27,2008, ... on Form 10KSB for the 2007 financial year (ended June ... for the quarters ended,September 30, 2007, December 31, 2007 as ... its SEC filings., The Board of Directors has set ...
... Pa., Sept. 8 Environmental,Tectonics Corporation,s (Amex: ... (SSG) announced today the award of two new ... System (M-138) and a,new cGMP Pharmaceutical Sterilization System ... field steam sterilizer (NSN 6530 00 926 2151), ...
... Pharmacokinetic Data to be Presented at the 7th International ... Symposium on ... AG, a leading,developer of antibody fragment therapeutics, today announced that ... the,company,s lead product candidate, ESBA105, in ophthalmic indications. In,April 2008, ...
Cached Biology Technology:Sangui BioTech International, Inc. Files Remaining Reports 2Environmental Tectonics Corporation's Sterilization Systems Group Announces New Contracts 2Environmental Tectonics Corporation's Sterilization Systems Group Announces New Contracts 3ESBATech Announces Successful Completion of Phase I Clinical Study for Lead Antibody Fragment in Ophthalmic Indications 2
... orbital shakers combine high durability and capacity ... triple-counterbalanced heavy-duty mechanism prevents vibration, allowing the ... loads. Every other part, from the large ... thick machined aluminum platform is designed to ...
Small bottle for hybridization 150 x 35mm...
Extra Large bottle for hybridization 300 x 70mm...
Biology Products: