Talk:Calcium
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Article changed over to Wikipedia:WikiProject Elements format by User:maveric149. Elementbox converted 12:11, 1 July 2005 by Femto (previous revision was that of 22:31, 25 June 2005).
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[edit] Information Sources
Some of the text in this entry was rewritten from Los Alamos National Laboratory. Additional text was taken directly from USGS Periodic Table. Other information was obtained from the sources listed on the main page but was reformatted and converted into SI units.
[edit] Talk
Does anyone know if calcium could be a possible alternative fuel source? I understand that in water, calcium produces hydrogen??. If anyone cares to respond feel free to leave a message on my talk page if the topic isn't appropriate for here. Wjbentley 10:17, 8 November 2005 (UTC)
Not really. Calcium isn't found in a native state and the energy needed to extract calcium from a calcium compound is much more than the energy available in the hydrogen released when calcium reacts with water. The only reason coal and petroleum are practical fuel sources is that plants can efficiently produce their precursors using photosynthesis. --PeterJeremy 22:57, 23 April 2006 (UTC)
maybe but i would like to know how it is used in the cell
this article should be expanded with the physiological and biological roles of calcium.
[edit] Precautions
I think someone ought to do a bit oln avoiding touching it with damp hands, not nice!
The history of calcium should be added. I am not familiar enough with the Wikipedia to do it myself without possibly screwing something up :(.
- Be BOLD man! Feel free to add it here if you're still too scared to add it yourself, someone will transfer it to the main article. Don't worry about screwing it up though, someone can always revert your edit if you make a mess of it! -81.99.181.231 18:54, 8 October 2005 (UTC)
[edit] Silvery White
I'm no chemist, but if I was, would those brown pellets appear to be "silvery white"? Why does this page describe brown pellets as silvery white? Is this a mistake? -asx- 01:34, 21 July 2005 (UTC)
- It refers to a clean, freshly cut surface of the pure metal, which quickly tarnishes and is hard to keep like that, however. http://www.theodoregray.com/PeriodicTable/Elements/020/index.s7.html shows a picture from the Everest sample set which is very similar to that in the article. Femto 18:01, 6 August 2005 (UTC)
[edit] calcium
who ever said 11 year olds couldn't do 9th grade research?! im looking for the history behind calcium. the symbol is CA. the atomic number is 20 the atomic mass is 40.08 the melting point is 1112c the boiling point is 1757c the cost is $11 per 100g it is a metal in the alkali family it was discovered in 1808 by Humphry Davy it is a solid when it is burned it flames in brihgt colours but i dont know the origin of the name or the # of protons nuetrons and electrons or the normal phase . where can i find them????
- This sounds more like your homework! Here's a couple of hints:
- 'Normal phase' means state at room temperature, as in 'solid', 'liquid' or 'gas'.
- Number of protons = the number of electrons = the atomic number.
- The number of neutrons = atomic mass - atomic number.
- Feel free to post back if you want me to check your answers for the above! -81.99.181.231 18:53, 8 October 2005 (UTC)
I have a project i am doing for school and i need 2 know alot of things... i havn't finished searching for everything i need but soo far i have found all my answers. I was just wondering if you could relate calciums properties of other elements in its group/family and what are some of the similarities and differences? thanks!
[edit] upcoming edit
Just to tell everyone here, this edit IS going to be a stab at the milk industry and the United States Department of Agriculture, who designed the food pyramid.
I'm not going to mention these two things, but I am going to emphasize the large number of alternative calcium sources, as a passive agressive attack on our acceptance of thinking what the dairy industry and the government tells us.
The edit is not going to be biased, but my intent is.
ok. ^_^ Blueaster 03:50, 5 December 2005 (UTC)
hi i just wanted to thank u guys here for adding my stuff to the calcium article...still think u should add chemical properties, though. but! u guys rock!
[edit] DYING!!!
Ok, well, I've been dying to pelt my own two-cents at this website. It doesn't have enough info!!! (But it's still the best) Anyway, below the "MAN" person says if I find, it will be added (maybe)... so... it better be!!!!
1)Place discovered: This element was discovered in England, or first seperated anyway. The Romans apparently prepared it as lime. (which they called calyx) lime => calyx (whatevr language the romans spoke. was it latin?) => calx (latin => calcium.. tada!!!
2)Location of most abundance: I don't know. I'm hoping someone will find out. Intrestingly, it's the 5th most abundant sunstance in the Earth's Crust, and 4th most abundant in the lunar whatevr. I think outerspace.
3)CHEMICAL PROPERTIES: I don't feel like listing them, so go to <http://environmentalchemistry.com/yogi/periodic/Ca.html#Chemical> and that site will have all the gory details like what it's ionization potential and electromagnetic equivalent is. fascinating stuff. PLEASE ADD THESE. i'm trying to help ur site and users, so ADD THEM!!!
4) COST PER GRAMS: it's around $ .10 according to some bodybuilding site. i'm hoping you'll find a more reliable source. and wondering who really takes pure calcium for their body... ew...
Well, I'm sure had more to add, but I can't think of it. In the meantime, put this in the article!!! —The preceding unsigned comment was added by 68.101.39.118 (talk • contribs) .
i think that this needs to have more info on the ELEMENT itself! thanxs!
signed the frustrated freshmn
[edit] Hey
drink your milk!
[edit] Calcium absorbtion
I think this article needs a section on absorbtion of calcium supplements. For example: that sodium intake decreases calcium absorbtion. I get some sources and hopefully add my edits but if anyone else wants to step in please do.
[edit] Fat reduced dairy a bad idea
Please. Butter fat is essential for optimal mineral absorbtion from milk, because of it's vitamin A and D content. Don't forget the fact, that rickets is prevented not primarily by calcium supplementation, but by supplementation with cod liver oil or plain butter, which are both abundant sources of A and D.
There are tons of books documenting various people living on traditional diets high in saturated fats (like butter fat) and displaying extraordinarily robust health, with perfect teeth and bone structure. Do some research, for God's sake.
If saturated fats, cholesterol and such (contrary to popular(ized) belief) vital substances, do somehow clog arteries, then a high percentage of mammals are at serious health risk when growing up exclusively on their mother's milk, that's obviously not fat reduced. We have some conflicting ideas here, because milk is considered, on the other hand, as the perfect food for babies, without which normal physical development and health of the baby is at risk.
Correlation of increased cholesterol (mainly found in saturated fat, such as butter) with increased incidence of vascular diseases can not possibly be interpreted as a cause-consequence relationship. There are numerous other nutritional, life-style and environmental factors, beside saturated fat intake, that influence cholesterol levels. And there are numerous studies that fail to show a clear connection between dietary cholesterol and blood cholesterol. And there are studies, connecting higher cholesterol to prolonged life span, and low cholesterol to shortened life span. And there is the pharmaceutical industry making billions, because they have studies showing how the pills they're selling lower cholesterol. Unfortunately, there are also studies showing that those medications indeed lower cholesterol, but also increase the risk of dying. And ... there are studies, showing that saturated fats have the most pronounced triglyceride lowering effect among all the fats. What I personally care about are documented traditional diets, that were able to keep the people perfectly disease free - and almost without exception, all such diets were based on foods high in saturated fats (milk, butter, cheese, lard, eggs, meat with fat, ... coconuts).
And. Lastly, saturated fat intake in USA was nearly constant in the last 100 years, while the intake of vegetable oils and margarine, together with refined sugars and grains, has exploded. Correlating along that line, the country suffered obesity epidemic, with cancer and heart disease being number one killers. Talking about countries, England eradicated rickets by essentially ordering its people to eat high staurated-fat foods like eggs and butter and I personally know about some old lady (that lived in times where rickets was common) still putting lard in a stew "for strong bones". Lard is abundant with vitamin D, so she's basically right.
Speaking about vitamin D, it just came to my mind, that vitamin D deficient people are more likely to be affected by cardio-vascular diseases and cancer than people whose diets or sun exposure provides ample amounts.
Bottom line is, if we are talking about milk as a calcium source, you definitely need all the butter fat there is in milk for your body to actually be able to utilize the calcium.
- But if you're consuming lots of dairy products, you will probably get an adequate amount of dairy fat from low-fat choices. If you're consuming lots of dairy products and they are high-fat choices, you will probably acquire a fat arse.
- Is it necessary to consume any dairy products at all? Many Asians traditionally do not, and yet they are fine. My boyfriend has recently got the results back from a comprehensive blood test. He is a vegetarian, and has an allergy to dairy products. He takes no supplements and yet he was normal for all nutrients. For example, he had 2.36 mmol/l of calcium, with the reference range for healthy people given as 2.15–2.65. Silversmith Hewwo 05:59, 21 July 2006 (UTC)
[edit] Sources?
I think it might be helpful to list sources for claims about dietary sources of calcium because the two sections about it seem to claim two different things with regard to dairy products. Outside of this page, I haven't ever heard anyone claim that dairy isn't a good source of calcium, I don't think, but it's a long time since I took either a biology class or a health class. On a more general note, the section "dietary sources of calcium" could probably be combined with "nutrition".AwesomeTruffle 20:33, 25 September 2006 (UTC)
[edit] Stellar absorption lines
It would be helpful if this article discussed the topic of Calcium absorption lines from a stellar astronomy perspective. In particular, with regard to the H and K lines that are commonly used to measure chromospheric activity.[1] Thank you! — RJH (talk) 17:16, 15 November 2006 (UTC)
