Topochemical approach to the structure-activity relation. Retroenantio-Gly5,10-gramicidin S

, . , -Gly^5,10- , Gly^5,10- .     

Antihypertensive effect of Co-factors of the synthesis and precursors of nucleic acids in experimental hypertension

, ₁₂, .     

Study of neurosecretory cells ofHelix pomatia by intracellular dye injection

#x043E; , . , .     

Changes in the lumen of coronary vessels under oligemic hypotension

Conclusions The decrease of circulating blood volume, resulting in oligemic hypotension, may evoke in anaesthetized cat the active constrictory coronary vessel responses of 2 types, one occuring immediately after start of the hypotension and the other having a significantly prolonged latency.

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, , , , ( 4 ), ( 45 ).

     

Proteins of venezuelan equine encephalomyelitis virions

. : (. . 59,000–61,000 ), (34,000–38,000) (15,000–18,000).     

X-ray research of polycrystals. X-ray diffraction methods for precision determinations of polycrystal lattice parameters over unsolved double lines

. - .     

Artificial lung ventilation during diaphragmatic paralysis

ÿe , CO₂ . CO₂ ÿe . , ÿe , .     

DNA synthesis and mitoses in atrial myocytes of rats with aortal stenosis

, . 2- , 1,60 ±0,59% , 0,96 ± 0,44% — . ë . , ³- .     

The peculiarities of capacitance vessel reflex responses

Conclusion Changes of the vessel capacity resulted from the pressor synocarotid reflexes, intestinal chemoreflexes and reflexes from the right atrium or ventricle and electric stimulation of the somatic nerve afferents can be either similarly or differently directed as compared with the responses of the resistance vessels.

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, , , .

     

Extrapyramidal pathways with monosynaptic effects upon primate α-motoneurons

, , , , , -.     

The benzilic acid rearrangement of 3α,17β-Diacetoxy-11-hydroxy-12-oxo-5β-androst-9(11)-ene

Zusammenfassung Die Bildung von 11-Carboxy-3, 11, 17-trihydroxy-13-C-nor-5-androstan 11a,17-Lakton aus 3, 17-Diacetoxy-11-hydroxy-12-oxo-5-⁹(11)-androsten wird beschrieben. Der Mechanismus und die Stereochemie dieser Umwandlung (Retro-Aldolkondensation und Benzilsäureumlagerung) wird diskutiert.     

Orally administered melatonin stimulates the 3α/β-hydroxysteroid oxidoreductase but not the 5α-reductase in the ventral prostate and seminal vesicles of pinealectomized rats

Summary Pinealectomized rats were treated orally with melatonin (MEL) for 14 days. Prostates and seminal vesicles were investigated for the activity of the 4-3-ketosteroid-5-oxidoreductase (5-R) and of the 3/-hydroxysteroid-oxidoreductase (3-HSO). The activity of the 3a-HSO was significantly stimulated (p<0.01, Friedman test) when compared to controls. The activity of the 5-R did not change significantly.This work was supported by the Deutsche Forschungsgemeinschaft, Sonderforschungsbereich 34 (Endokrinologie).     

Mutual replaceability of amide and ester groups in biologically active peptides and depsipeptides

, .     

Monoamine oxidase activity in membrane structures of rat liver cell

, .     

Purothionins inAegilops-Triticum spp.

Resumen EnTriticum durum Desf. (genomiosAB), el genomioA controla la sintesis de purotionina y el genomioB la de purotionina . Las especies diploides del grupoAegilops-Triticum sintetizan ó, pero no las dos. En numerosos aloploides de este grupo se observa la pérdida de la actividad sintética para la purotionina correspondiente a uno de los genomios.     

A study of the mechanism of polymyxin M inactivation

.I.NH₄OH , N N - - ,-. , .     

Reactive synthesis of DNA and mitotic division in atrial heart muscle cells following ventricle infarction

/- 5 - / . , .     

Chromosomes and giemsa-bands of the Idaho spotted ground squirrel,Spermophilus brunneus (Howell)

-Spermophilus brunneus . , 13 18 ,S. brunneus S. townsendii mollis (2n=38) , , ; ;S. brunneus . S. brunneus , Spermophilus.

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Supported by National Science Foundation Grants No. GB32114X and No. GB 29131X, and the Sprague Foundation. We thankD. Pozin for technical assistance.     

The syntheses of axillarin and its related compounds

Zusammenfassung Axillarin (5, 7, 3, 4-Tetrahydroxy-3,6-dimethoxyflavon). 5,3,4-Trihydroxy-3,6,7-trimethoxyflavon und 5,7,3,4-Tetrahydroxy-3,8-dimethoxyflavon wurden synthetisiert.     

Association of viral ribonucleoprotein with polysomes

() 6 . , (=1,41, 1,45, 1,49 1,55 g/cm³). .