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MIT chemists have devised a new chemical reaction that allows them to synthesize a phosphorus-containing ring, using a catalyst to add phosphorus to simple organic compounds called alkenes.
Optimal fold symmetry of LH2 rings on a photosynthetic membrane
LH2 rings a photosynthetic membrane
2014/9/24
An intriguing observation of photosynthetic light-harvesting systems is theN-fold symmetry of light-harvesting complex 2 (LH2) of purple bacteria. We calculate the optimal rotational configuration of ...
On Polynomial Functions Over Finite Commutative Rings
Polynomial function Finite commutative local ring Generalized Witt polynomial
2007/12/12
Let $R$ be an arbitrary finite commutative local ring. In this paper, we obtain a necessary and sufficient condition for a function over $R$ to be a polynomial function. Before this paper, necessary a...
Synthesis and Characterization of New Triheterocyclic Compounds Consisting of 1,2,4-Triazol-3-one, 1,3,4-Thiadiazole and 1,3,4-Oxadiazole Rings
1,2,4-triazol-3-one 1,3,4-thiadiazole 1,3,4-oxadiazole thiosemicarbazide diazotation deamination
2010/4/20
A series of acetic acid derivatives (2a-c) was synthesized by the condensation of compounds 1a-c with chloroacetic acid. The treatment of carboxylic acid derivatives with thiosemicarbazide in phospho...
An Investigation of the Interaction of 4-Membered Rings with Adjacent Carbanion Centers
Carbanions cyclobutylcarbinyl cyclopropylcarbinyl strained molecules
2010/4/22
A series of cyclobutylcarbinyl phenyl ketones was prepared and the rates of base catalyzed hydrogen-deuterium exchange of a -hydrogen atoms were compared with those of appropriate model compounds, to ...
A Two-Dimensional Monte Carlo Polymerization of 5-Membered Rings
Two-Dimensional Monte Carlo Polymerization 5-Membered Rings
2010/8/15
A modification of the kinetic growth model in two dimensions for the polymerization of 5-membered rings is presented. The preliminary results reveal the validity of the modified model.