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Production of heavy-elements in inhomogeneous cosmologies
(1994-07-10)
Baryon density inhomogeneities during big bang nucleosynthesis can result from a variety of possible causes (e.g., quantum chromodynamic and electroweak phase transitions; cosmic strings). We present here the consequences ...
Variation in myoplasmic Ca2+ concentration during contraction and relaxation studied by the indicator fluo-3 in frog muscle fibres
(1994-07-01)
1. The fluorescent dye fluo-3, in its permeant acetoxymethyl form, was used to monitor calcium transients during twitch and tetanus of single fibres isolated from the anterior tibialis muscle of Rana temporaria (2-5 degrees ...
Structure and expression of an inhibitor of fungal polygalacturonases from tomato
(1994-07-01)
A polygalacturonase inhibitor protein (PGIP) was characterized from tomato fruit. Differential glycosylation of a single polypeptide accounted for heterogeneity in concanavalin A binding and in molecular mass. Tomato PGIP ...
Deconstructing car assembler productivity
(1994-06-01)
Two generations later in history, social science and management the question is not whether to measure but how to measure and how to evaluate the results of measurement. This paper aims to make a contribution to this debate: ...
Glycopeptide antibiotic activity and the possible role of dimerization : A model for biological signaling
(1994-06-01)
It is demonstrated that the presence of bacterial cell wall analogues may either enhance or, in the case of ristocetin A, oppose dimerization of glycopeptide antibiotics. These observations may imply that dimerization plays ...
Reduction/carburisation of columbite concentrate
(1994-06-01)
The carbothermic reduction of columbite has been investigated at 1400°C utilising coal and graphite as alternative sources of carbon. Reduction to an iron-carbon matrix and NbC and TaC carbides occurs readily with complete ...
Dissection of the contributions toward dimerization of glycopeptide antibiotics
(1994-06-01)
A procedure for the determination of association constants in aqueous solution using hydrogen-deuterium exchange has been developed and used to measure the dimerization constant, K(dim), for a number of strongly dimerizing ...
Factors affecting growth and yield of winter oilseed rape (Brassica napus), 1985--89
(1994-06)
Effects of agronomic factors on yield of winter oilseed rape were examined in multifactorial experiments, with a single-low (low erucic acid, high glucosinolate) cultivar (Bienvenu) in 1984/85 to 1987/88 and a double-low ...
Kinetic dissociation of nickel titanate and nickel tungstate in oxygen potential gradients
(1994-06-01)
Nickel titanate (NiTiO) and nickel tungstate (NiWO) were exposed to oxygen potential gradients at 1400 and 1100° C, and they were found to dissociate into their constituent oxides, namely, NiO and TiO, and WO and NiO, ...