Organic Chemistry Message Board http://organicchemistrymessageboard.yuku.com/directory en-us Copyright 2006, Yuku feeds@yuku.com (FeedMaster) webmaster@yuku.com (WebMaster) Sat, 07 Nov 2009 00:00:00 GMT Fri, 06 Nov 2009 07:52:21 GMT Yuku Feeds 1.0 http://blogs.law.harvard.edu/tech/rss 60 Yuku http://static.yuku.com//feed/bypass/images/button-yuku.png http://organicchemistrymessageboard.yuku.com/directory Yuku - free hosted forums and profiles 88 31 {pics-1.1 "http://www.icra.org/ratingsv02.html" l gen true for "http://yuku.com" r (nz 1 vz 1 lz 1 oz 1 cz 1 ) "http://www.rsac.org/ratingsv01.html" l gen true for "http://yuku.com" r (n 0 s 0 v 0 l 0 )) Search Search Domain q http://yuku.com/search/direct/ <![CDATA[ Cyromazine-insecticide and an acaricide ]]> http://organicchemistrymessageboard.yuku.com/topic/1687/t/Cyromazine-insecticide-and-an-acaricide.html Cyromazine is is a cyclopropyl derivative of melamine.It is a triazine insect growth regulator used as an insecticide and an acaricide.
Cyromazine works by affecting the nervous system of the immature larval stages of certain insects.In veterinary medicine, cyromazine is used as a ectoparasiticide. ]]> feeds@yuku.com (sunnye) http://organicchemistrymessageboard.yuku.com/topic/1687 Fri, 06 Nov 2009 07:52:21 GMT <![CDATA[ a Antihypertensive Drug-Cilnidipine ]]> http://organicchemistrymessageboard.yuku.com/topic/1686/t/a-Antihypertensive-Drug-Cilnidipine.html Cilnidipine is a dual blocker of L-type voltage-gated Ca2+ channels in vascular smooth muscle and N-type Ca2+ channels in sympathetic nerve terminals that supply blood vessels.
Cilnidipine has been developed as a slow-onset and long-lasting antihypertensive drug in Japan.
Recent electrophysiological data indicate that cilnidipine might be a dual-channel antagonist for peripheral neuronal N-type and vascular L-type... ]]> feeds@yuku.com (sunnye) http://organicchemistrymessageboard.yuku.com/topic/1686 Fri, 06 Nov 2009 07:51:06 GMT <![CDATA[ Dimethoate ]]> http://organicchemistrymessageboard.yuku.com/topic/1685/t/Dimethoate.html Dimethoate is a widely used organophosphate insecticide used to kill insects on contact. It was patented and introduced in the 1950s by American Cyanamid. Like other organophosphates, dimethoate is an anticholinesterase which disables cholinesterase, an enzyme essential for central nervous system function.

]]> feeds@yuku.com (sunnye) http://organicchemistrymessageboard.yuku.com/topic/1685 Fri, 06 Nov 2009 07:49:37 GMT <![CDATA[ Sodium bicarbonate ]]> http://organicchemistrymessageboard.yuku.com/topic/1684/t/Sodium-bicarbonate.html Sodium bicarbonate(144-55- is a white crystalline solid material and odorless. It is widely used in the food industry, in making rubber; in pharmaceuticals; as an antacid; in fire extinguishers, soap and detergents, rug cleaners, animal feeds, and textiles; in leather preparation; in soap, detergent, and paper manufacturing; for flue-gas scrubbing; and... ]]> feeds@yuku.com (sunnye) http://organicchemistrymessageboard.yuku.com/topic/1684 Fri, 06 Nov 2009 07:24:59 GMT <![CDATA[ What effect might sulfuric acid have on the environment? ]]> http://organicchemistrymessageboard.yuku.com/topic/1683/t/What-effect-might-sulfuric-acid-have-on-the-environment-.html Sulfuric acid will exist as particles or droplets in the air if released to the atmosphere. It dissolves when mixed with water. It

has moderate acute (short-term) toxicity on aquatic life. Sulfuric acid is very corrosive and would badly burn any plants, birds or

land animals exposed to it. It has moderate chronic (long-term) toxicity to aquatic life. Chronic effects on plants, birds or land

... ]]> feeds@yuku.com (sunnye) http://organicchemistrymessageboard.yuku.com/topic/1683 Fri, 06 Nov 2009 07:23:50 GMT <![CDATA[ sodium chlorate ]]> http://organicchemistrymessageboard.yuku.com/topic/1682/t/sodium-chlorate.html When pure, sodium chlorate(7775-09-9) is a white crystalline powder that is readily soluble in water. It is hygroscopic. It decomposes above 250 °C to release oxygen and leave sodium chloride.
Sodium chlorate is used as a non-selective herbicide. It is considered phytotoxic to all green plant parts. It can also kill through root absorption.
Sodium chlorate is manufactured by the electrolysis of saturated,... ]]> feeds@yuku.com (sunnye) http://organicchemistrymessageboard.yuku.com/topic/1682 Fri, 06 Nov 2009 07:20:38 GMT <![CDATA[ What effect might 2-Ethoxyethanol have on my health? ]]> http://organicchemistrymessageboard.yuku.com/topic/1681/t/What-effect-might-2-Ethoxyethanol-have-on-my-health-.html 2-Ethoxyethanol can effect you when breathed in or by passing through your skin. Short-term exposures may irritate the eyes, nose, and throat. Very high levels may cause you to feel dizzy, lightheaded and to pass out. Long-term effects from exposure to 2-Ethoxyethanol are possible kidney damage, damaged blood cells, damaged testes in males, and decreased fertility in males. 2-Ethoxyethanol has been shown to be a teratogen... ]]> feeds@yuku.com (sunnye) http://organicchemistrymessageboard.yuku.com/topic/1681 Fri, 06 Nov 2009 07:11:04 GMT <![CDATA[ about Conjugated linoleic acid ]]> http://organicchemistrymessageboard.yuku.com/topic/1680/t/about-Conjugated-linoleic-acid.html Conjugated linoleic acids (CLA) are a family of at least 28 isomers of linoleic acid found especially in the meat and dairy products derived from ruminants. As the name implies, the double bonds of CLAs are conjugated.
CLAs were discovered accidentally by researchers looking for mutagens in beef. The dairy and beef industries have taken note of CLA's healthy benefits and are researching the natural... ]]> feeds@yuku.com (sunnye) http://organicchemistrymessageboard.yuku.com/topic/1680 Wed, 04 Nov 2009 21:21:33 GMT <![CDATA[ 1H NMR & IR : unknown structure determination ]]> http://organicchemistrymessageboard.yuku.com/topic/1679/t/1H-NMR-IR-unknown-structure-determination.html
I was struggling in solving this question which is a part of a practice exam, and I need you to be patient with me and teach me step by step how to figure out the structure and how to read and analyze the spectra.

I attached the two 1H NMR & IR spectra so you will be able to know what structure I'm talking about.

I started with finding the saturation number which is 5 so I know that at least I have aromatic ring and double bond(s)
I predicted... ]]> feeds@yuku.com (dead actor) http://organicchemistrymessageboard.yuku.com/topic/1679 Sun, 01 Nov 2009 17:59:51 GMT <![CDATA[ 1-acetyl-2-phenyl hydrazine ]]> http://organicchemistrymessageboard.yuku.com/topic/1678/t/1-acetyl-2-phenyl-hydrazine.html 1-acetyl-2-phenyl hydrazine
1-acetyl-2-phenyl hydrazine is white to light yellow crystal powder with its formula C8H10N2O. It is chemical raw material and slightly soluble in water.
Its synonyms are... ]]> feeds@yuku.com (sunnye) http://organicchemistrymessageboard.yuku.com/topic/1678 Sat, 31 Oct 2009 21:45:30 GMT <![CDATA[ 3,4-diaminobenzoic acid ]]> http://organicchemistrymessageboard.yuku.com/topic/1677/t/3-4-diaminobenzoic-acid.html 3,4-diaminobenzoic acid is chemical raw material, and often used as intermediate. I have read about some process about it. Take follows for example.
3,4-diaminobenzoic acid is an intermediate for the preparation of poly[2,5(6)-benzimidazole], a polymer having excellent high temperature properties and resistance to acid hydrolysis. Known methods of preparing... ]]> feeds@yuku.com (sunnye) http://organicchemistrymessageboard.yuku.com/topic/1677 Sat, 31 Oct 2009 21:29:20 GMT <![CDATA[ 2,4-DIAMINO MESITYLENE ]]> http://organicchemistrymessageboard.yuku.com/topic/1676/t/2-4-DIAMINO-MESITYLENE.html 2,4-DIAMINO MESITYLENE is a light yellow to brown crystal powder, it is used as intermediate for dyestuff and pharmaceuticals.
It has some synonyms such as 2,4,6-trimethyl-1,3-benzenediamine;2,4,6-trimethyl-3-benzenediamine;1,3-DIAMINO-2,4,6-TRIMETHYLBENZENE;2,4-DIAMINOMESITYLENE;2,4-DIAMINO-1,3,5-TRIMETHYLBENZENE. ]]> feeds@yuku.com (sunnye) http://organicchemistrymessageboard.yuku.com/topic/1676 Sat, 31 Oct 2009 20:52:39 GMT <![CDATA[ Benzene ]]> http://organicchemistrymessageboard.yuku.com/topic/1675/t/Benzene.html Does 1,4 dimethylbenzene have to be orginized like this or can it be written on top right and bottom left
]]> feeds@yuku.com (Jason123) http://organicchemistrymessageboard.yuku.com/topic/1675 Sat, 31 Oct 2009 19:36:47 GMT <![CDATA[ Tetraphenyltin ]]> http://organicchemistrymessageboard.yuku.com/topic/1674/t/Tetraphenyltin.html Tetraphenyltin is an off-white crystal powder, and often used as chemical catalyst.
It is insoluble in water and has melting point 223-229 °C, Boiling point 420 °C, Flash point 111 °C.
It has some synonyms, such as Tetraphenyltin, Tetraphenylstannane, Stannane, tetraphenyl-, Tin tetraphenyl, TETRAPHENYL TIN.

]]> feeds@yuku.com (sunnye) http://organicchemistrymessageboard.yuku.com/topic/1674 Sat, 31 Oct 2009 07:55:42 GMT <![CDATA[ Effects of Benidipine on Daytime Blood Pressure Changes in Patients with Essential Hypertension ]]> http://organicchemistrymessageboard.yuku.com/topic/1673/t/Effects--Benidipine--Daytime-Blood-Pressure-Changes--Patient.html feeds@yuku.com (sunnye) http://organicchemistrymessageboard.yuku.com/topic/1673 Sat, 31 Oct 2009 06:49:36 GMT <![CDATA[ asymmetric hydrogenation of olefin prochiral substrate ]]> http://organicchemistrymessageboard.yuku.com/topic/1672/t/asymmetric-hydrogenation-of-olefin-prochiral-substrate.html Dear all,

Now I am doing a research about producing chiral compound from olefin base prochiral substrate. I have tried to utilize short chain of olefin substrate such as dimethyl itaconate until dibutyl itaconate, but the results were not satisfying enough. Actually I want to try other olefin substrate with more bulky group which usually contain phenyl group. But I face a problem that usually the more bulky olefinic compounds exist in carboxylic acid form. Then I have to convert to... ]]> feeds@yuku.com (kiky) http://organicchemistrymessageboard.yuku.com/topic/1672 Thu, 29 Oct 2009 00:30:12 GMT <![CDATA[ Cancer Chemotherapy Diet ]]> http://organicchemistrymessageboard.yuku.com/topic/1671/t/Cancer-Chemotherapy-Diet.html imageA nutritious diet during chemotherapy tends to decrease the severeness of the side effects of chemotherapy. It also increases the effectiveness of chemotherapy, and thus decreases its duration, because a well nourished body responds well to cancer treatment.
Cancer chemotherapy diet should include foods high in proteins, such as eggs, nuts, dairy and beans. Vegetables,... ]]> feeds@yuku.com (sunnye) http://organicchemistrymessageboard.yuku.com/topic/1671 Wed, 28 Oct 2009 02:44:44 GMT <![CDATA[ 2,4-Dichlorophenoxyacetic acid ]]> http://organicchemistrymessageboard.yuku.com/topic/1670/t/2-4-Dichlorophenoxyacetic-acid.html 2,4-Dichlorophenoxyacetic acid was developed during World War II by a... ]]> feeds@yuku.com (vivianbao) http://organicchemistrymessageboard.yuku.com/topic/1670 Sun, 25 Oct 2009 07:09:30 GMT <![CDATA[ CLINICAL PHARMACOLOGY of Pemirolast potassium ]]> http://organicchemistrymessageboard.yuku.com/topic/1669/t/CLINICAL-PHARMACOLOGY-of-Pemirolast-potassium.html Pemirolast potassium is a slightly yellow, water-soluble powder with a molecular formula of C10H7KN6O, molecular weight of 266.3,its Chemical name is 9-methyl-3-(1H-tetrazol-5-yl)-4H-pyrido[1,2-α] pyrimidin-4-one potassium.Pemirolast potassium is used for long-term treatment of bronchial asthma.
Pemirolast potassium had no effect on mating and fertility in rats at oral... ]]> feeds@yuku.com (vivianbao) http://organicchemistrymessageboard.yuku.com/topic/1669 Sun, 25 Oct 2009 07:08:00 GMT <![CDATA[ NYC Sting Uncovers ＇Gun Show Loophole＇ ]]> http://organicchemistrymessageboard.yuku.com/topic/1668/t/NYC-Sting-Uncovers-Gun-Show-Loophole-.html Investigators hired by New York City conducted stings at gun shows in states that have not closed the "gun show loophole" and found some vendors openly selling weapons to buyers who admitted they couldn't pass background checks.

The stings, described in a city report released Wednesday, were conducted at seven gun shows in Tennessee, Ohio and Nevada. Those states are among the many that permit private unlicensed... ]]> feeds@yuku.com (sunnye) http://organicchemistrymessageboard.yuku.com/topic/1668 Fri, 23 Oct 2009 16:02:29 GMT