Selenium

Question: How does Selenium enter the water supply and how can we eliminate it from the water supply? i need to know for my science project...i need to know exactly from what materials gets it into the water supply and what purifying techniques will get excess selenium out of the water.

Answer: Selenium is a trace metal naturally occurring in soils derived from some sedimentary rocks. Upon oxidation to the selenate ion, it can percolate to ground water and be assimilated by plants. from http://www3.interscience.wiley.com/journal/119570245/abstract?CRETRY=1&SRETRY=0 Also, Selenium is a metal that is used mainly in electronics & photocopiers. However, it is also in widespread use in glass, rubber, textile & petroleum industries. Selenium is an essential nutrient at low levels with many people even ingesting selenium supplements. However, at toxic levels selenium can cause kidney & liver damage & problems to the nervous & circulatory systems. The following states in the U.S. saw major selenium releases to their water & land: Utah, Arizona, Wisconsin, Indiana & Texas. from http://www.healthy-water-best-filters.com/heavy-metals-within-water.html Most of the metals in our water can be dealt with by buying a good water filter.

Question: What happens to test animals deprived of selenium? Does selenium affect the heart? According to doctors prescribing it liver deterioration occurs in animals deprived of selenium. The same doctors say selenium is needed for healthy heart.

Answer: It has beneficial effect on liver diseases, It should not reach serum level of 400 microgram, or it can cause myocardial infarction as shown in several studies, mechanism not known.

Question: How many Brazil Nuts would it take to selenium overdose? I've heard the brazil nuts contain a lot of mineral selenium which is good in moderation but if you eat too much it may cause nausea, vomiting, hair loss, nail loss e.t.c. How many would you have to eat, in order to overdose?

Answer: Eating the desired food is vital for your wellbeing. You can try supplementing your diet with acai berry, it's not only a widely tested and acknowledged weight loss compound, it's a superfood too. There's a risk free trial available at http://bopult.wholenesspro.info I have been using it for two weeks now and it is definitely working!!

Question: What is the kinemetic energy max for cesium and selenium? Im doing a problem that ask for the photon frequency required to eject electrons of cesium and selenium, and the equation is f=(KE + hft)/h. I am given hft and h, but not KE. I looked up the problem online, and the answer book said KE was 0J for both. Why do I need to assume its 0?

Answer: You want to find out the energy (and so frequency, since E=h f, f = E/h) to just eject an electron and no more. If you want to just eject the electron and no more, the electron is going to leave the atoms with the smallest amount of Kinetic energy possible. In reality that's going to be an infinitesimally small number, which we can approximate to zero. So take the Kinetic energy of the emitted electron as 0.

Question: How to get selenium into a horses diet? OK so I was reading how some horses don't get enough selenium in their diet. So I was just wondering how much selenium is in hay, and alfalfa pellets with corn oil? Oh and vitamin E?

Answer: As Ladyren said, Selenium is a natural substance that all animals, including horses, need to survive. Horses, however, will react to an overdose of Selenium by dying, and it isn't pretty. It also isn't curable. So basically, unless you are in a selenium deficient part of the U.S., or you work your horse very very hard, you won't need to worry about it. If you ever choose to add it to your horse's diet, you should consult a vet. Too much selenium will kill a horse-- it's one reason they warn owners to never ever buy a cattle lick for horses-- the levels in a cattle lick are toxic for horses. 21 polo ponies, worth about $200,000 each, died after being given an incorrectly prepared supplement containing too much selenium. No one could save them, and they died within hours of getting the supplement. Selenium isn't something to mess around with.

Question: How to test a url for searching a word in it by using selenium IDE? Friends, i just started with testing with selenium IDE. Can any one of you help me, as i want to test some Urls to check that they contain some particular word.

Answer: Hi, storeLocation ( variableName ) gets the absolute URL of the current page. On getting the URL, you may use an assertion command e.g. assertText or verifyText to verify the presence of the word in the URL. Thanks, Inder P Singh Blog: Software Testing Space http://inderpsingh.blogspot.com

Question: What are some common ionic form of selenium? Need to know soon please. Also add anything else you know about selenium. And if possible the electron configuration.

Answer: Electron Configuration: 1s^2 2s^2p^6 3s^2p^6d^10 4s^2p^4 Sources of Selenium: Obtained as a by-product of lead, copper and nickel refining. World wide annual production is around 600 tons. Primary mining areas are Canada, USA, Bolivia and Russia. Uses of Selenium: Used in photoelectric cells, TV cameras, as a semiconductor in solar batteries, light meters, copy machines, anti-dandruff shampoo and rectifiers. Also colors glass red. Read more: http://environmentalchemistry.com/yogi/periodic/Se.html

Question: How man unpaired electrons in a gaseous selenium atom? My choices are 2, 3, 4, 5 I think it's just asking for the element selenium, [Ar]3d^104s^2p^4. This has 2 unpaired electrons. Am I thinking of this correct?

Answer: Yes, you are correct. The second and third electrons in the 4p orbital remained unpaired.

Question: will selenium sulfide get rid of stretch marks? Will Selenium Sulfide get rid of stretch marks, and is it safe to use while pregnant?

Answer: try cocca butter (creme) not lotion

Question: Does anyone have any experiences with a horse that has a Selenium deficiency? How do you know if a horse needs Selenium? If the horse needs it, is there any other way to give it than a grain supplement? My mare gets alfalfa hay, but no grain.

Answer: Well when a horse has a selenium deficiency they tend to stumble a lot. That's the only thing I know. Do a bit of research and find out what the earth is like around where you live cos in some places the soil is naturally lacking in selenium. You can either buy powder that you put in a hard feed or you can get liquid. To feed the liquid you either put it in a hard feed or put it on a piece of bread and feed it to your horse. But be careful! Too much selenium is poisonous to a horse!! Good luck!! Hope I helped.

Question: How would you do the math for the number of atoms in a sample of 135 mg of selenium? I am working on my Chemistry homework and I am suppose to calculate the number of atoms in a sample of 135 mg of selenium...how do I do that math for that?

Answer: 135/the mass of the atom(in mg)=The amount. I'm not quite sure how heavy selenium is though... But that should help you a bit :) And btw, that other guy is kinda a douche.... he made me facepalm :P

Question: How do you find 1 mol of Selenium? I need to know the molar of one atom of Se. Is it anywhere on the periodic table? From this info I need to be able to find out how many moles there are in 2.80x10^24 atoms of Selenium.

Answer: 1 mol of an atom is its atomic mass and divide that really long number by Avagadro's number (6.02x10^23)

Question: Can I get selenium poisoning from a topical cream? I was recently prescribed 2.5 % selenium lotion for a fungus on my skin. I was told the fungus is pretty harmless and easy to get rid of. The directions say leave on for only 10 minutes then wash off. If I leave it on longer, is it possible to absorb enough through my skin to be toxic.

Answer: Selenium is a trace element that people already have in their bodies. It's a healthy thing to have but only in a small amount. It doesn't seem like it would be toxic unless you swallow it. I think the main reason they tell you wash it off is because it might discolor your skin. If you're not sure, why don't you call the pharmacy where you bought it and ask them. The pharmacist should know.

Question: Which of the following statements is FALSE regarding the mineral selenium? A. Selenium is a component of the antioxidant glutathione peroxidase enzyme system. B. Selenium is involved in the maintenance of basal metabolism and body temperature. C. Selenium is present only in foods of animal origin. D. Selenium is needed in minute amounts by the human body.

Answer: I know C is false as selenium is found in Brazil nuts.

Question: What are some foods with selenium in them? I have heard and read quite a lot about selenium could prevent cancer, and there is quite a lot of cancer in my family, so I thought I'd give it a try. Can't hurt at least. Anyone else heard about this? So, can you guys list some foods with selenium in them?^^, Thanks:)

Answer: Hi there, Yes Ive also heard about selenium health benefits including preventing cancer. From my research it seems legitamit. Selenium is an antioxidant (scavengers of free-radicals) and a component of several essential enzymes. Health benefits of selenium are partly explained by its antioxidant effect. Selenium may delay or prevent the onset of cancer and also have anti-aging effect. Selenium is also an important mineral needed for proper thyroid function. It also promotes immunity system. Surprizingly quite alot of everyday foods contain selenium so its not too hard to incorporate into your daily diet. Natural food sources high in selenium include cereals (eg. corn, wheat, and rice), nuts (brazil nuts and walnuts), legumes (soybeans), animal products (beef, chicken, egg, cheese), seafood (tuna). Other selenium rich foods are oats, cods and turkey. Brazil nuts are among the very rich sources of selenium. Hope my answer helps!

Question: How many protons neutrons and electrons does Selenium have? How many protons neutrons and electrons does Selenium have? please help i need this information for a project

Answer: Number of Protons/Electrons: 34 Number of Neutrons: 45