quinkert - essays in contemporary chemistry - from molecular structure towards biology (wiley, 2001)

... catalysis by L -proline in aldolizations, Pedersen’s crown ethers, syntheses of corrins, hydroporphyrins, and vitamin B 12 . Essays in Contemporary Chemistry From Molecular Structure towards Biology V H A C Essays ... in them a little. Essays in Contemporary Chemistry: From Molecular Structure towards Biology. Edited by Gerhard Quinkert and M. Volkan...

Ngày tải lên: 03/04/2014, 12:14

... additivity is again a man- ifestation of the saturation of nuclear forces mentioned above. It is surprising from the quantum mechanical point of view. In fact, since the binding energy arises from the ... nucleon is worth remembering! The additivity of binding energies is quite different from what happens in atomic physics where the binding energy of an atom with Z electrons in- cr...

Ngày tải lên: 17/03/2014, 14:37

... pyridine (5.2). In this case, the NH 2 induces charges ortho and para to the in- ring N. These charges interact indirectly with the dipole of the nitrogen in the ring and result in a net increase ... respectively. 3.1.4.4. Intramolecular H-Bonding Effects Model Intramolecular hydrogen bonding is a direct site coupling of a proton donating (α) site with a proton accepting (β) site...

Ngày tải lên: 22/03/2014, 14:20

... 0.03 0.02 0.01 ing the relationship universal for all p0lymers.3~ Equation (29) can now be rewritten in terms of ten- sile stress as follows: - - - - - - - - - (37) The other ... combine to define the con- tribution to the internal energy U from the inter- molecular potential: u= uo[2(;)&apos ;-( ;)l] (19) Taking the partial of U w...

Ngày tải lên: 01/04/2014, 00:20

... they were combined into a single law, involving concentrations or “active masses”. Guldberg and Waage also initially experienced difficulties in finding the proper expo- nents involved in the description ... and work on Marcelin Berthelot [16]. In this work, indications are given of Berthelot’s under- standing of the role of mathematics in chemistry: “the mathematicians make an incoh...

Ngày tải lên: 01/04/2014, 10:29

... employ Winograd's terminology for functional gran~nar (Winograd, 1983). In general, case schemata will be mapped into CLAUSE-RS and concept schemata are mapped into NP-R~. A CLAUSE-RS has ... forcing nominalized constructions. FROM CONCEPTS TO LANGUAGE In the target language oriented stage 2, the following decisions have to be made: REFERENCING AND FOCUSSING For referencin...

Ngày tải lên: 08/03/2014, 18:20

... in mammalian globins. Keywords: hemoglobin; trematode; H-bonding; dipolar shift; NMR. Globins (hemoglobin, Hb, and myoglobin, Mb) are ferrous heme-containing, O 2 -binding proteins found widespread in nature ... remaining helical segment VI,Z i -Thr i+1 -Gly i+2 - Z i+3 -Gly i+4 -Ala i+5 -AMX i+6 -AMX i+7 -Ala i+8 -Z i+9 - AMX i+10 -Thr i+11 -Ala i+12 (Fig. 3), is unique to residu...

Ngày tải lên: 23/03/2014, 17:22

... trimeric GTP-binding proteins (G-proteins). The enzyme-linked receptors include the receptor guanylyl cyclases, receptor tyrosine kinases, tyrosine-kinase-associated receptors, receptor tyrosine phosphatases ... Labels into Proteins 270 10.2.1 Protein Production and 13 C and 15 N-labeling in E. coli Expression Systems 271 10.2.2 13 C- and 15 N-labeling of Proteins in P. pastoris 274 10.2....

Ngày tải lên: 08/04/2014, 12:51

... Further reproduction prohibited without permission. Three essays on economic reform and household behavior in contemporary China Lee, Ming-Hsuan ProQuest Dissertations and Theses; 2008; ProQuest

Ngày tải lên: 03/06/2014, 02:20