Dictionary » D » Dimethyl



(Science: chemistry) Ethane; sometimes so called because regarded as consisting of two methyl radicals. See ethane.

Origin: Pref. Di- _ methyl.

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Re: how to memorize the amino acid

... is an imino acid. Alanine is the "basic" amino acid. Now, serine and cysteine are hydroxy- and thiol derivatives. Valine and leucine are dimethyl and isopropyl derivatives. Isoleucine is not iso- for no reason, so you move the methyl by one carbon. Threonine and methionine are little ...

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by JackBean
Thu Feb 09, 2012 9:52 am
Forum: General Discussion
Topic: how to memorize the amino acid
Replies: 4
Views: 7126

Membrane transport

... and l-pentose have such varied permeabilities although nearly the same structure. b. Explain what relationship is shown with urea, thiourea and dimethyl urea. c. Explain why glycerol has a low permeability but can be the backbone of the membrane triglycerides. I think a) Due to same molecular ...

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by grant01
Thu Dec 02, 2010 10:04 pm
Forum: Cell Biology
Topic: Membrane transport
Replies: 2
Views: 4030

Re: 1 MOLAR histidine?

... μl of 1 M sodium bicarbonate then derived with 300 μl of 4-fluoro-3-nitrobenzo-trifluoride (FNBT) reagent (a mixture of 10 μl of FNBT and 1 ml of dimethyl sulfoxide) at 60 °C for 20 min. At the end of derivation, 40 μl of 1 M histidine in 1 M sodium bicarbonate was added to the reaction mixture ...

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by mediocritus
Mon Apr 21, 2008 3:48 pm
Forum: Molecular Biology
Topic: 1 MOLAR histidine?
Replies: 6
Views: 4656

The Iron Hypothesis

... iron on a large scale should actually cool the planet directly, in addition to increasing C drawdown, because all those liddle phytos release DMS (dimethyl suphide) which is a water nucleator i.e. a rainmaker. Unproductive areas are far from land (see above) and the most productive ones are where ...

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by kotoreru
Tue Nov 13, 2007 2:04 am
Forum: Ecology
Topic: The Iron Hypothesis
Replies: 8
Views: 6592

Anthropogenic global warming?

... Southern Ocean...now that is interesting stuff. 02 doesnt cool the atmosphere to my knowledge, and in fact is actually not our main concern. DMS (dimethyl sulphide) does cool the atmosphere as it oxidises to sulphate and nucleates water to form cloud...and this stuff is released from phytoplankton ...

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by kotoreru
Thu May 24, 2007 11:36 am
Forum: Ecology
Topic: Anthropogenic global warming?
Replies: 188
Views: 162625
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