(Studies on AI-77s, microbial products with pharmacological activity) structures and the chemical nature of AI-77s

1982 ◽  
Vol 23 (51) ◽  
pp. 5435-5438 ◽  
Author(s):  
Yukiji Shimojima ◽  
Hiroshi Hayashi ◽  
Tadaaki Ooka ◽  
Mitsuru Shibukawa ◽  
Yoichi Iitaka
Keyword(s):  
Pharmacological Activity ◽  
Chemical Nature ◽  
Microbial Products

scholarly journals Cucurbitacins and its Anticancer property: A Review

2019 ◽  
pp. 17-23
Author(s):  
Ashmi Samuel
Keyword(s):  
Cancer Research ◽  
Pharmacological Activity ◽  
Mode Of Action ◽  
Chemical Nature ◽  
Molecular Targets ◽  
Diverse Group ◽  
Property A ◽  
Medicinal Compound ◽  
Plant Families

Cucurbitacins which are structurally unlike triterpenes found in the members of Cucurbitaceae and several other plant families possess immense pharmacological activity. This diverse group of compounds may substantiate to be important lead molecules for the treatment of cancer. Research focused on this unattended medicinal compound can prove the significance and explore the hidden potential to cure various diseases. These compounds show their proposed mode of action, probable molecular targets and have future aspects of their use as a medicinal agent. This review is aimed to provide the chemical nature and medicinal property of cucurbitacins.

Studies on AI-77s, microbial products with gastroprotective activity. Structures and the chemical nature of AI-77s

Tetrahedron ◽  
1984 ◽  
Vol 40 (13) ◽  
pp. 2519-2527 ◽  
Author(s):  
Yukiji Shimojima ◽  
Hiroshi Hayashi ◽  
Tadaaki Ooka ◽  
Mitsuru Shibukawa ◽  
Yoichi Iitaka
Keyword(s):  
Chemical Nature ◽  
Gastroprotective Activity ◽  
Microbial Products

Release of Neurosecretion in the Crayfish Sinus Gland

1968 ◽  
Vol 26 ◽  
pp. 150-151
Author(s):  
Richard R. Shivers
Keyword(s):  
Chemical Nature ◽  
Storage Site ◽  
Neurosecretory Granules ◽  
Sinus Gland ◽  
Diameter Class ◽  
Dense Membrane ◽  
Neurohemal Organ ◽  
Dense Vesicles

The sinus gland is a neurohemal organ located in the crayfish eyestalk and represents a storage site for neurohormones prior to their release into the circulation. The sinus gland contains 3 classes of dense, membrane-limited granules: 1) granules measuring less than 1000 Å in diameter, 2) granules measuring 1100-1400 Å in diameter, and 3) granules measuring 1500-2000 Å in diameter. Class 3 granules are the most electron-dense of the granules found in the sinus gland, while class 2 granules are the most abundant. Generally, all granules appear to undergo similar changes during release.Release of neurosecretory granules may be initiated by a preliminary fragmentation of the “parent granule” into smaller, less dense vesicles which measure about 350 Å in diameter (V, Figs. 1-3). A decrease in density of the granules prior to their fragmentation has been observed and may reflect a change in the chemical nature of the granule contents.

Freeze-fracture cytochemistry: A goal set by Russell Steere in 1957

1993 ◽  
Vol 51 ◽  
pp. 60-61
Author(s):  
Nicholas J Severs
Keyword(s):  
Chemical Nature ◽  
Biological Systems ◽  
Freeze Fracture ◽  
Structural Components ◽  
Major Goal ◽  
Membrane Biology ◽  
Routine Application ◽  
The Future ◽  
Freeze Etching

In his pioneering demonstration of the potential of freeze-etching in biological systems, Russell Steere assessed the future promise and limitations of the technique with remarkable foresight. Item 2 in his list of inherent difficulties as they then stood stated “The chemical nature of the objects seen in the replica cannot be determined”. This defined a major goal for practitioners of freeze-fracture which, for more than a decade, seemed unattainable. It was not until the introduction of the label-fracture-etch technique in the early 1970s that the mould was broken, and not until the following decade that the full scope of modern freeze-fracture cytochemistry took shape. The culmination of these developments in the 1990s now equips the researcher with a set of effective techniques for routine application in cell and membrane biology.Freeze-fracture cytochemical techniques are all designed to provide information on the chemical nature of structural components revealed by freeze-fracture, but differ in how this is achieved, in precisely what type of information is obtained, and in which types of specimen can be studied.

Cell parameters refinements showing an influence of the chemical nature of the grain surface on the crystalline characteristics of fine grained powders

1998 ◽  
Vol 08 (PR5) ◽  
pp. Pr5-85-Pr5-89
Author(s):  
P. Sarrazin ◽  
F. Bernard ◽  
G. Calvarin ◽  
J. C. Niepce ◽  
B. Thierry
Keyword(s):  
Chemical Nature ◽  
Cell Parameters ◽  
Fine Grained ◽  
Grain Surface
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