What happens in the reaction of acetyl salicylic acid with H2SO4 and methanol?
Q. Does the ester in acetyl salicylic acid survive the reaction? Or is it changed somehow? And more generally, what happens in the reaction?
Asked by Per E - Mon Apr 2 19:50:38 2007 - - 1 Answers - 0 Comments
A. What happens to the carboxylic acid is the Fischer esterification. Basically, the -OH group is replaced by -OCH3. I think the ester will remain unchanged.
Answered by ahelaumakani - Tue Apr 3 01:53:15 2007
Q. Does the ester in acetyl salicylic acid survive the reaction? Or is it changed somehow? And more generally, what happens in the reaction?
Asked by Per E - Mon Apr 2 19:50:38 2007 - - 1 Answers - 0 Comments
A. What happens to the carboxylic acid is the Fischer esterification. Basically, the -OH group is replaced by -OCH3. I think the ester will remain unchanged.
Answered by ahelaumakani - Tue Apr 3 01:53:15 2007
What will happen to the rate of reaction of pyruvate dehydrogenase when acetyl-CoA concentrations are high?
Q. I'm thinking the rate of reaction would slow down since the excess would have to be inhibited by the acetyl-CoA/CoA ratio. Can someone tell me if I'm on the right track?
Asked by dearxclementine - Mon Mar 23 21:44:51 2009 - - 1 Answers - 0 Comments
A. YES. pyruvate dehydrogenase complex is inhibited by products of the reaction, Acetyl CoA and NADH.
Answered by Peter S - Tue Mar 24 10:49:39 2009
Q. I'm thinking the rate of reaction would slow down since the excess would have to be inhibited by the acetyl-CoA/CoA ratio. Can someone tell me if I'm on the right track?
Asked by dearxclementine - Mon Mar 23 21:44:51 2009 - - 1 Answers - 0 Comments
A. YES. pyruvate dehydrogenase complex is inhibited by products of the reaction, Acetyl CoA and NADH.
Answered by Peter S - Tue Mar 24 10:49:39 2009
What major organic products would you expect to be formed when acetyl chloride reacts with the following reage?
Q. What major organic products would you expect to be formed when acetyl chloride reacts with the following reagents? (a) H2O (b) NH3 (excess) (c) 1-Butanol and pyridine (d) CH3COO minus , Na plus
Asked by FlaChick - Sat Mar 14 18:14:26 2009 - - 3 Answers - 0 Comments
A. (a) CH3COOH acetic acid (b) CH3CONH2 acetamide (c) CH3COOCH2CH2CH2CH3 1-butyl acetate (d) (CH3CO)2O acetic anhydride
Answered by steve_geo1 - Sat Mar 14 18:30:17 2009
Q. What major organic products would you expect to be formed when acetyl chloride reacts with the following reagents? (a) H2O (b) NH3 (excess) (c) 1-Butanol and pyridine (d) CH3COO minus , Na plus
Asked by FlaChick - Sat Mar 14 18:14:26 2009 - - 3 Answers - 0 Comments
A. (a) CH3COOH acetic acid (b) CH3CONH2 acetamide (c) CH3COOCH2CH2CH2CH3 1-butyl acetate (d) (CH3CO)2O acetic anhydride
Answered by steve_geo1 - Sat Mar 14 18:30:17 2009
What are the side effects of an oral administration of n- acetyl l-cysteine supplements?
Q. i have 600 mg supplements, will they cause nausea and vomiting. should i lower the dose to prevent this.
Asked by loni_831 - Fri Aug 22 01:34:29 2008 - - 1 Answers - 0 Comments
A. It all depends on your weight and your age and how ofter you have to take it. If it is a trial drug you might want to discuss this with your doctor.
Answered by Dante - Fri Aug 22 04:40:14 2008
Q. i have 600 mg supplements, will they cause nausea and vomiting. should i lower the dose to prevent this.
Asked by loni_831 - Fri Aug 22 01:34:29 2008 - - 1 Answers - 0 Comments
A. It all depends on your weight and your age and how ofter you have to take it. If it is a trial drug you might want to discuss this with your doctor.
Answered by Dante - Fri Aug 22 04:40:14 2008
Why exactly is Acetyl CoA needed in cellular respiration?
Q. The CoA bonds to pyruvate after it enters the mitochondrion, but right when it's about to enter the citric acid cycle, it detaches. What happens in between that's important to the system? Is the CoA needed for the pyruvate to bond to oxaloacetate?
Asked by caboke12 - Wed Oct 22 22:30:45 2008 - - 2 Answers - 0 Comments
A. On entry to the mitochondria the pyruvate decarboxylation occurs, producing acetyl CoA. This irreversible reaction traps the acetyl CoA within the mitochondria (the acetyl-CoA can only be transported out of the mitochondrial matrix under conditions of high oxaloacetate via the citrate shuttle, a TCA intermediate that is normally sparse). The reaction with acetyl-CoA and oxaloacetate (OAA) by citrate synthase to form citrate is a highly exergonic reaction (-32.2 kJ/mol) because the high energy thioester undergoes hydrolysis to free the CoA and citrate. The large, negative standard free energy change of the reaction is essential to the operation of the citric acid cycle because the concentration of OAA is normally very low.
Answered by Mark C - Wed Oct 22 23:17:36 2008
Q. The CoA bonds to pyruvate after it enters the mitochondrion, but right when it's about to enter the citric acid cycle, it detaches. What happens in between that's important to the system? Is the CoA needed for the pyruvate to bond to oxaloacetate?
Asked by caboke12 - Wed Oct 22 22:30:45 2008 - - 2 Answers - 0 Comments
A. On entry to the mitochondria the pyruvate decarboxylation occurs, producing acetyl CoA. This irreversible reaction traps the acetyl CoA within the mitochondria (the acetyl-CoA can only be transported out of the mitochondrial matrix under conditions of high oxaloacetate via the citrate shuttle, a TCA intermediate that is normally sparse). The reaction with acetyl-CoA and oxaloacetate (OAA) by citrate synthase to form citrate is a highly exergonic reaction (-32.2 kJ/mol) because the high energy thioester undergoes hydrolysis to free the CoA and citrate. The large, negative standard free energy change of the reaction is essential to the operation of the citric acid cycle because the concentration of OAA is normally very low.
Answered by Mark C - Wed Oct 22 23:17:36 2008
What is the effect of acetyl choline in the nerve conduction velocity and muscle?
Q. How is nerve conduction measured? What are the effect of some other selected chemicals(e.g. nicotine, epinephine and diazepam ) on nerve conduction velocity and musle?
Asked by roger - Sun Oct 8 20:35:40 2006 - - 2 Answers - 0 Comments
A. acetylcholine will cause a stimulatory reaction on the parasympathetic neuron or organ. It will cause a muscle to move. Epinephine will cause a general sympathetic reaction.
Answered by Lea - Sun Oct 8 23:21:18 2006
Q. How is nerve conduction measured? What are the effect of some other selected chemicals(e.g. nicotine, epinephine and diazepam ) on nerve conduction velocity and musle?
Asked by roger - Sun Oct 8 20:35:40 2006 - - 2 Answers - 0 Comments
A. acetylcholine will cause a stimulatory reaction on the parasympathetic neuron or organ. It will cause a muscle to move. Epinephine will cause a general sympathetic reaction.
Answered by Lea - Sun Oct 8 23:21:18 2006
What happens if isobutanal is mixed with acetyl-chloride?
Q. That makes sense. Anyone concur?
Asked by water_skipper - Mon May 17 12:24:53 2010 - - 1 Answers - 0 Comments
Q. That makes sense. Anyone concur?
Asked by water_skipper - Mon May 17 12:24:53 2010 - - 1 Answers - 0 Comments
Should i start taking N-Acetyl-Cysteine? I am 20 years old, in good health but would like to be safe with h1n1?
Q. Should i start taking N-Acetyl-Cysteine? I am 20 years old, in good health but would like to be safe with h1n1?
Asked by scott d - Sun May 3 14:56:07 2009 - - 1 Answers - 0 Comments
A. you won't get it. If for some reason you should defy the odds and contract it, you'll be fine. It is a much weaker H1N1 than was in the spanish flu. don't worry about it, this was simply the media making a mountain out of a molehile to up the ratings.
Answered by Troy - Sun May 3 16:44:41 2009
Q. Should i start taking N-Acetyl-Cysteine? I am 20 years old, in good health but would like to be safe with h1n1?
Asked by scott d - Sun May 3 14:56:07 2009 - - 1 Answers - 0 Comments
A. you won't get it. If for some reason you should defy the odds and contract it, you'll be fine. It is a much weaker H1N1 than was in the spanish flu. don't worry about it, this was simply the media making a mountain out of a molehile to up the ratings.
Answered by Troy - Sun May 3 16:44:41 2009
What is the difference between Guaifenesin vs N-Acetyl Cysteine?
Q. Is there another that is good for breakign down sinus mucas?
Asked by nhkitten03 - Mon Mar 20 21:13:15 2006 - - 1 Answers - 0 Comments
A. Link:
Answered by dcomputerman - Mon Mar 20 21:32:33 2006
Q. Is there another that is good for breakign down sinus mucas?
Asked by nhkitten03 - Mon Mar 20 21:13:15 2006 - - 1 Answers - 0 Comments
A. Link:
Answered by dcomputerman - Mon Mar 20 21:32:33 2006
How conversationn of Pyruvate from Acetyl CoA is not possible at animal during even carbon betafatty oxidation?
Q. How conversationn of Pyruvate from Acetyl CoA is not possible at animal during even carbon betafatty oxidation?
Asked by Sarmishtha C - Tue Jun 9 04:18:13 2009 - - 1 Answers - 0 Comments
A. Beta oxidation of fatty acids occurs in the matrix of the mitochondria and the Acetyl CoA produced enters the Krebs Cycle.
Answered by Peter S - Tue Jun 9 06:48:24 2009
Q. How conversationn of Pyruvate from Acetyl CoA is not possible at animal during even carbon betafatty oxidation?
Asked by Sarmishtha C - Tue Jun 9 04:18:13 2009 - - 1 Answers - 0 Comments
A. Beta oxidation of fatty acids occurs in the matrix of the mitochondria and the Acetyl CoA produced enters the Krebs Cycle.
Answered by Peter S - Tue Jun 9 06:48:24 2009
At the start of the Krebs cycle, acetyl CoA reacts with which molecule to form citrate, a six-carbon molecule?
Q. At the start of the Krebs cycle, acetyl CoA reacts with which molecule to form citrate, a six-carbon molecule?
Asked by yep - Fri Apr 9 16:45:59 2010 - - 3 Answers - 0 Comments
A. oxaloacetate oxaloacetate is a 4-carbon molecule and the acetyl portion of acetyl CoA is a 2-carbon molecule. The two molecules react (and coenzyme A is released in the process) to produce the 6-carbon molecule citrate as the first step of the Krebs cycle. It's just oxaloacetate, not also pyruvate as another answerer said. The pyruvate from glycolysis is converted into acetyl CoA: that's where the acteyl CoA that enters the Krebs cycle comes from.
Answered by DNAunion - Fri Apr 9 18:19:22 2010
Q. At the start of the Krebs cycle, acetyl CoA reacts with which molecule to form citrate, a six-carbon molecule?
Asked by yep - Fri Apr 9 16:45:59 2010 - - 3 Answers - 0 Comments
A. oxaloacetate oxaloacetate is a 4-carbon molecule and the acetyl portion of acetyl CoA is a 2-carbon molecule. The two molecules react (and coenzyme A is released in the process) to produce the 6-carbon molecule citrate as the first step of the Krebs cycle. It's just oxaloacetate, not also pyruvate as another answerer said. The pyruvate from glycolysis is converted into acetyl CoA: that's where the acteyl CoA that enters the Krebs cycle comes from.
Answered by DNAunion - Fri Apr 9 18:19:22 2010
.How many net ATP are produced in the cellular respiration stages of glycolysis through synthesis of acetyl ?
Q. Synthesis of Acetyl CoA a. 2b. 4c. 16 d. 38
Asked by WSS - Tue Oct 14 19:55:38 2008 - - 4 Answers - 0 Comments
A. a
Answered by spikegirl9999 - Tue Oct 14 20:03:07 2008
Q. Synthesis of Acetyl CoA a. 2b. 4c. 16 d. 38
Asked by WSS - Tue Oct 14 19:55:38 2008 - - 4 Answers - 0 Comments
A. a
Answered by spikegirl9999 - Tue Oct 14 20:03:07 2008
How many cycles of the fatty acid spiral are needed for stearic acid to be completely converted to acetyl CoA?
Q. a. 8 b. 9 c. 16 d. 18 I think its 8 or 9, but im leaning towards 8. Im not sure though
Asked by Lisa S - Wed Jul 21 12:45:11 2010 - - 1 Answers - 0 Comments
A. a. 8 Jot down a line of 18 C's and divide them into two's with slash marks. Count the number of slash marks.
Answered by steve_geo1 - Wed Jul 21 13:51:40 2010
Q. a. 8 b. 9 c. 16 d. 18 I think its 8 or 9, but im leaning towards 8. Im not sure though
Asked by Lisa S - Wed Jul 21 12:45:11 2010 - - 1 Answers - 0 Comments
A. a. 8 Jot down a line of 18 C's and divide them into two's with slash marks. Count the number of slash marks.
Answered by steve_geo1 - Wed Jul 21 13:51:40 2010
Does any1 know reaction of n-butyl alcohol with acetyl chloride?
Q. Write an equation for the reaction of n-butyl alcohol with acetyl chloride. What gas evolved?
Asked by David N - Fri Mar 28 10:35:48 2008 - - 3 Answers - 0 Comments
A. It forms an ester: CH3COCl + C4H9OH = CH3COOC4H9 + HCl HCl is the gas Ester is n-butanoyl acetate (ethanoate)
Answered by gladys - Fri Mar 28 10:54:49 2008
Q. Write an equation for the reaction of n-butyl alcohol with acetyl chloride. What gas evolved?
Asked by David N - Fri Mar 28 10:35:48 2008 - - 3 Answers - 0 Comments
A. It forms an ester: CH3COCl + C4H9OH = CH3COOC4H9 + HCl HCl is the gas Ester is n-butanoyl acetate (ethanoate)
Answered by gladys - Fri Mar 28 10:54:49 2008
In the Krebs cycle, what event happens to the carbon atoms in the acetyl portion of an acetyl CoA molecule?
Q. A. They're released as CO2 B. They're incorporated into pyruvate molecules C. They're converted to nadh d. Nothing E. I'm not sure.
Asked by lil_dougie - Wed Jan 21 08:44:32 2009 - - 1 Answers - 0 Comments
A. a
Answered by Ferrari Boy - Wed Jan 21 22:23:34 2009
Q. A. They're released as CO2 B. They're incorporated into pyruvate molecules C. They're converted to nadh d. Nothing E. I'm not sure.
Asked by lil_dougie - Wed Jan 21 08:44:32 2009 - - 1 Answers - 0 Comments
A. a
Answered by Ferrari Boy - Wed Jan 21 22:23:34 2009
How does N acetyl glucosamine effect blood sugar?
Q. Is it used to lower it?
Asked by Baz - Thu Aug 14 10:25:39 2008 - - 3 Answers - 0 Comments
A. it affects adversely ,
Answered by drankurbhardwaj - Thu Aug 21 00:49:31 2008
Q. Is it used to lower it?
Asked by Baz - Thu Aug 14 10:25:39 2008 - - 3 Answers - 0 Comments
A. it affects adversely ,
Answered by drankurbhardwaj - Thu Aug 21 00:49:31 2008
What is released as a by-product of cellular respiration during the conversion of pyruvate into acetyl CoA?
Q. What is released as a by-product of cellular respiration during the conversion of pyruvate into acetyl CoA? oxygen glucose carbon dioxide water pyruvic acid
Asked by im2spoiled4me - Wed Jun 2 22:45:26 2010 - - 1 Answers - 0 Comments
A. carbon dioxide
Answered by Derek - Wed Jun 2 23:02:35 2010
Q. What is released as a by-product of cellular respiration during the conversion of pyruvate into acetyl CoA? oxygen glucose carbon dioxide water pyruvic acid
Asked by im2spoiled4me - Wed Jun 2 22:45:26 2010 - - 1 Answers - 0 Comments
A. carbon dioxide
Answered by Derek - Wed Jun 2 23:02:35 2010
What is the molar mass of Acetyl Salicylic Acid?
Q. What is the molar mass of Acetyl Salicylic Acid (asprin) Thanks...
Asked by moosetracks - Thu Feb 11 21:06:15 2010 - - 2 Answers - 0 Comments
A. 180 g/mol
Answered by ASV78 - Thu Feb 11 21:11:37 2010
Q. What is the molar mass of Acetyl Salicylic Acid (asprin) Thanks...
Asked by moosetracks - Thu Feb 11 21:06:15 2010 - - 2 Answers - 0 Comments
A. 180 g/mol
Answered by ASV78 - Thu Feb 11 21:11:37 2010
Why does the second acetyl group enter the unoccupied ring to form diacetylferrocene?
Q. Why does the second acetyl group enter the unoccupied ring to form diacetylferrocene?
Asked by tuwtle12 - Sun Jul 13 11:54:18 2008 - - 3 Answers - 0 Comments
A. Complexes of aromatic compounds with transition metals display aromatic characteristics. This is shown, among other things, by the fact that many such compounds undergo aromatic substiution reactions. A survey of substitutions and secondary reactions in such systems is given. That's why :)
Answered by S L - Sun Jul 13 11:58:01 2008
Q. Why does the second acetyl group enter the unoccupied ring to form diacetylferrocene?
Asked by tuwtle12 - Sun Jul 13 11:54:18 2008 - - 3 Answers - 0 Comments
A. Complexes of aromatic compounds with transition metals display aromatic characteristics. This is shown, among other things, by the fact that many such compounds undergo aromatic substiution reactions. A survey of substitutions and secondary reactions in such systems is given. That's why :)
Answered by S L - Sun Jul 13 11:58:01 2008
What would the product be when acetyl chloride reacts with these reagents?
Q. a) CH3NH2 (excess) b) C6H5NH2 (excess c) (CH3)2NH (excess) d)CH3CH2OH and pyridine e)CH3CO2-Na+ f)CH3CO2H and pyridine g) phenol and pyridine
Asked by swingoutk - Sun Nov 9 09:05:16 2008 - - 1 Answers - 0 Comments
A. a) CH3NH2 (excess) N-methyl acetamide, CH3CONHCH3 b) C6H5NH2 (excess) N-phenyl acetamide, CH3CONHC6H5 c) (CH3)2NH (excess)2 N,N-dimethyl acetamide, CH3CON(CH3)2 d)CH3CH2OH and pyridine ethyl acetate, CH3CO2CH2CH3 e)CH3CO2-Na+ acetic anhydride, (CH3CO)2O f)CH3CO2H and pyridine acetic anhydride, (CH3CO)2O (not sure on this one) g) phenol and pyridine phenyl acetate, CH3CO2C6H5
Answered by Glenguin - Mon Nov 10 08:41:05 2008
Q. a) CH3NH2 (excess) b) C6H5NH2 (excess c) (CH3)2NH (excess) d)CH3CH2OH and pyridine e)CH3CO2-Na+ f)CH3CO2H and pyridine g) phenol and pyridine
Asked by swingoutk - Sun Nov 9 09:05:16 2008 - - 1 Answers - 0 Comments
A. a) CH3NH2 (excess) N-methyl acetamide, CH3CONHCH3 b) C6H5NH2 (excess) N-phenyl acetamide, CH3CONHC6H5 c) (CH3)2NH (excess)2 N,N-dimethyl acetamide, CH3CON(CH3)2 d)CH3CH2OH and pyridine ethyl acetate, CH3CO2CH2CH3 e)CH3CO2-Na+ acetic anhydride, (CH3CO)2O f)CH3CO2H and pyridine acetic anhydride, (CH3CO)2O (not sure on this one) g) phenol and pyridine phenyl acetate, CH3CO2C6H5
Answered by Glenguin - Mon Nov 10 08:41:05 2008
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However, an acetyl derivative, acetylshikonin had less toxicity and prevented the growth of sarcomas. However, knowledge of the effect of acetylshikonin on gastric cancer in vitro and especially in vivo is unknown. A research article to be published on ...
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