Comparison of crystalline structures of polymorphous modifications of certain organic compounds

1972 ◽  
Vol 13 (3) ◽  
pp. 452-456 ◽  
Author(s):  
N. N. Chesnokova ◽  
P. M. Zorkii ◽  
T. V. Timofeeva
Keyword(s):  
Organic Compounds ◽  
Crystalline Structures ◽  
Polymorphous Modifications

Stacking-dependent tetracolour luminescence and mechanofluorochromic properties of an isoquinoline derivative with aggregation-induced emission

2022 ◽  
Author(s):  
Yating Chen ◽  
Bo Wang ◽  
yunxiang Lei ◽  
Yun-Bing Zhou ◽  
Yang Guo ◽  
...  
Keyword(s):  
Organic Compounds ◽  
Organic Molecule ◽  
Aggregation Induced Emission ◽  
Crystalline Structures ◽  
Isoquinoline Derivative

Although nearly one-third of organic compounds have polymorphism, more than three polymorphs with definite crystalline structures in an organic molecule are very rare. Herein, an aggregation-induced-emission-active isoquinoline derivative containing ethyl...

The Tempo and mode(S) of Prebiotic Evolution

1997 ◽  
Vol 161 ◽  
pp. 419-429 ◽  
Author(s):  
Antonio Lazcano
Keyword(s):  
Origin Of Life ◽  
Organic Compounds ◽  
Biological Evolution ◽  
Current Evidence ◽  
Early Diversification ◽  
Time Period ◽  
The Galaxy ◽  
History Of ◽  
Widespread Phenomenon ◽  
The Origin Of Life

AbstractDifferent current ideas on the origin of life are critically examined. Comparison of the now fashionable FeS/H2S pyrite-based autotrophic theory of the origin of life with the heterotrophic viewpoint suggest that the later is still the most fertile explanation for the emergence of life. However, the theory of chemical evolution and heterotrophic origins of life requires major updating, which should include the abandonment of the idea that the appearance of life was a slow process involving billions of years. Stability of organic compounds and the genetics of bacteria suggest that the origin and early diversification of life took place in a time period of the order of 10 million years. Current evidence suggest that the abiotic synthesis of organic compounds may be a widespread phenomenon in the Galaxy and may have a deterministic nature. However, the history of the biosphere does not exhibits any obvious trend towards greater complexity or «higher» forms of life. Therefore, the role of contingency in biological evolution should not be understimated in the discussions of the possibilities of life in the Universe.

Intranuclear Crystals in Regenerating Canine Kidneys

1973 ◽  
Vol 31 ◽  
pp. 412-413
Author(s):  
D.G. Osborne ◽  
L.J. McCormack ◽  
M.O. Magnusson ◽  
W.S. Kiser
Keyword(s):  
Epithelial Cell ◽  
Epithelial Cells ◽  
Tubular Epithelial Cell ◽  
Tubular Epithelial Cells ◽  
Cell Nuclei ◽  
Crystalline Structures ◽  
Small Crystals ◽  
Membrane Bound

During a project in which regenerative changes were studied in autotransplanted canine kidneys, intranuclear crystals were seen in a small number of tubular epithelial cells. These crystalline structures were seen in the control specimens and also in regenerating specimens; the main differences being in size and number of them. The control specimens showed a few tubular epithelial cell nuclei almost completely occupied by large crystals that were not membrane bound. Subsequent follow-up biopsies of the same kidneys contained similar intranuclear crystals but of a much smaller size. Some of these nuclei contained several small crystals. The small crystals occurred at one week following transplantation and were seen even four weeks following transplantation. As time passed, the small crystals appeared to fuse to form larger crystals.

Organic Compounds C8 to C28

1995 ◽  
Keyword(s):  
Organic Compounds

Environmental Effects on Molecular Propcrtics of Organic Compounds. Part II. β-Cyclodextrin Inclusion Complexes with Cieinamic Acids

1988 ◽  
Vol 156 (1) ◽  
pp. 405-411
Author(s):  
E. Hadljoudis ◽  
I. Mouatakali-maridis ◽  
G. Tsoucaris ◽  
F. Villain ◽  
G. Le Bas
Keyword(s):  
Organic Compounds ◽  
Inclusion Complexes ◽  
Environmental Effects ◽  
Cyclodextrin Inclusion Complexes ◽  
Cyclodextrin Inclusion

Microbe; Removal of Hazardous Organic Compounds

1982 ◽  
Vol 16 (3) ◽  
pp. 170-183 ◽  
Keyword(s):  
Organic Compounds ◽  
Hazardous Organic Compounds
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