Now showing items 21-30 of 827
Boron-modified polysilylcarbodi-imides as precursors for Si–B–C–N ceramics: Synthesis, plastic-forming and high-temperature behavior
(John Wiley & Sons, Ltd., 1998-10)
The synthesis, by two different reaction pathways, of boron-modified polysilylcarbodi-imides of general type {B[C 2 H 4 Si(R)NCN] 3 } n (R 14=singly bonded organic ligand) and the plastic-forming and the thermal behavior ...
Topological studies of spinach 22 kDa protein of Photosystem II
(Elsevier, 1994-12-30)
An intrinsic 22 kDa polypeptide is associated with the O2-evolving Photosystem II core complex in a variety of green plants, although it does not appear to be required for O2 evolution. Digestion of thylakoid membranes and ...
cDNA and derived amino acid sequence of rabbit nasal cytochrome P450NMb (P450IIG1), a unique isozyme possibly involved in olfaction
(Elsevier, 1991-02-15)
Olfactory-specific cytochrome P450NMb was previously purified to electrophoretic homogeneity from microsomes of rabbit nasal mucosa in this laboratory. In the present study, a cDNA library made from poly(A)+ RNA from rabbit ...
The sampling properties of some distance geometry algorithms applied to unconstrained polypeptide chains: A study of 1830 independently computed conformations
(Wiley Subscription Services, Inc., A Wiley Company, 1990-10)
In this paper we study the statistical geometry of ensembles of poly(L-alanine) conformations computed by several different distance geometry algorithms. Since basic theory only permits us to predict the statistical ...
Actin polymerization in cellular oxidant injury
(Elsevier, 1991-08-01)
Microfilaments undergo an ATP-dependent disruption into shortened bundles following cellular exposure to oxidants. This phenomenon does not require a net change in the amount of polymerized actin. However, increased amounts ...
Selective inhibition by alcohol and cortisol of natural killer cell activity of lymphocytes from cord blood
(Elsevier, 1994-12)
1. 1. The immunosuppressive effects of drugs such as alcohol or hormones such as cortisol may be age-related. To test this hypothesis, the authors investigated the in vitro effects of ethanol (EtOH) and cortisol on Natural ...
Progress in Practice: Exploring the Cooperative and Collaborative Dimensions of Group Learning
(Springer-Verlag; Springer-Verlag New York, Inc., 1996-03)
We all participate in a variety of groups as part of our daily lives, from families to social and work communities. As chemists, we are part of our college departments, our professional societies, our research groups, and ...
Reactions of Azides with Electrophiles: New Methods for the Generation of Cationic 2‐Azabutadienes. Synthesis of 1,2, 3,4‐Tetrahydroquinolines and 1,2‐Dihydroquinolines via a Hetero Diels–Alder Reaction
(WILEY‐VCH Verlag, 1997)
Two methods for the generation of iminium ions of the type ArN + (X)=CHR (X = H or alkyl, R = H or alkyl) are reported: (1) the Bronsted‐acid‐promoted rearrangement of benzylic azides and (2) the intermolecular Schmidt ...
Thermodynamics of iron sulfides I. Heat capacity and thermodynamic properties of Fe9S10 at temperatures from 5 K to 740 K
(Elsevier, 1991-03)
Measurements of the heat capacity of Fe9S10 over the temperature range 5 K to 740 K reveal a first-order structural transition at 495 K and two higher-order transitions with maxima at 534 K and 591 K. The last two are of ...