منابع مشابه
Optics of sunbeams
Crepuscular and solar rays are visible by means of the contrast between sunlit and (usually) cloud-shaded portions of the atmosphere. Their visibility depends on (1) the volume angular-scattering coefficient (), (2) the brightness of the sunlit sky, and (3) the integrated optical path through the shadowed regions of the atmosphere. We show that the geometry of path length through the umbra (3) ...
متن کاملGynodioecism in Cucumbers.
HE standard cultivars of cucumbers, Cucumis sativus L., are monoecious. These monoecious plants are male early in development and female later. The standard races exhibit marked differences in the expression of monoecism, ranging from weak to strong male tendency. Available information suggests that these racial differences reflect genetic variations governing rate of sex conversion during plan...
متن کاملTasmanian Sea ~ Cucumbers ( Holothuroidea )
Over five hundred and forty of seacucumbers eollected on the southern coasts of Tasmania have in the course of the present study. Seven families, 12 and 14 species are represented in the One is regarded are as new, adhaerens, TaVUtll. and Paraca.udina. Three other species have not been recorded previously from Tasmania but are known from the coast of Victoria. They are Cllcurnella Jnutans incon...
متن کاملBiologically Active Triterpene Glycosides from Sea Cucumbers (holothuroidea, Echinodermata)
Sea cucumbers are characterized by their content in holothurins, triterpenoid glycosides that are responsible for the toxicity of these echinoderms. Nearly 100 holothurins isolated in the last twenty years are grouped into three main aglycone structural types: 3p-hydrox>iiolost-9(ll)-ene, 3p-hydrox5*iolost-7-ene and nonholostane based aglycones. This communication offers a general view of the s...
متن کاملGlycosides from edible sea cucumbers stimulate macrophages via purinergic receptors
Since ancient times, edible sea cucumbers have been considered a jewel of the seabed and used in Asian folk medicine for stimulation of resistance against different diseases. However, the power of this sea food has not been established on a molecular level. A particular group of triterpene glycosides was found to be characteristic metabolites of the animals, responsible for this biological acti...
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ژورنال
عنوان ژورنال: Journal of Computational and Graphical Statistics
سال: 2011
ISSN: 1061-8600,1537-2715
DOI: 10.1198/jcgs.2011.204a