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Start Over Coverage 243-248

1. Predstavlenije geopotenciala systemoj točečnych mass s kompleksnymi parametrami

Creator:
Cholševnikov, K. V. and Poleščikov, S. M.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
geopotential, point masses system, and complex parameters
Language:
Czech
Description:
(Summary) Representation is considered of the Earth´s gravity field by means of a system of attracting point masses. Models with complex parameters appear to be perspective in spite of their more complicated character. A criterion is established for the potential model to be a single-valued function. *** and Druhá část souhrnu obsahující výpočty (ručně psané) zde nezachycena
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

2. The assembly of chlorophyli into pigment-protein complexes

Creator:
Marder, J. B and Raskin, V. I.
Format:
print
Type:
model:internalpart and TEXT
Language:
Multiple languages
Description:
Chlorophyll (Chl) fluorescence from greening and fiilly green barley leaves was analyzed using a phase-modulated fluorimeter. Inunediately following the irradiation of fiilly-etiolated leaves, a pool of (newly-synthesised) Chl/chlorophyllide was detected with a fluorescence lífetime similar to that of these pigments in solution. After some hours, the major fluorescence component was a short-lifetime species which we believe to represent photosystem 2. Selective inhibition of polypeptide synthesis in either the chloroplast or cytosol greatly reduced the extent of Chl assimilation and gave rise to novel fluorescence-lifetime profiles which are believed to arise flom complexes in various stages of assembly. Hence angiosperms háve evolved control systems to lim't the appearance of free Chl; this involves close co- ordination between pigment and polypeptide synthesis.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public