CRITERIA OF INTACTNESS AND THE PHOTOSYNTHETIC ACTIVITY OF SPINACH CHLOROPLAST PREPARATIONS

Uncouplers of Spinach Chloroplast Photosynthetic

tion at pH 5.5 resulted in preferential destruction of IC photoreduction ability. 4. Addition of zinc ion preferentially inhibited the photooxidation of ascorbic acid. 5. Treatment of chloroplasts with digitonin resulted in a drastic loss of ability to catalyze the Hill reaction and IC photoreduction, yet yielded a preparation which was over 6 times as active in terms of ascorbic acid photooxid...

Uncouplers of Spinach Chloroplast Photosynthetic Phosphorylation.

Photoreduction and Photooxidation of Cytochrome c by Spinach Chloroplast Preparations.

The photoreduction of cytochrome c by spinach chloroplasts has been noted by several investigators (12, 20, 25). In a preliminary report, we have presented evidence that aqueous digitonin extracts of spinach chloroplasts contain a cytochrome c photooxidase (22) which appears to be similar to the photooxidase present in extracts of photosynthetic bacteria studied by Kamen and Vernon (13, 14, 32)...

comparison of catalytic activity of heteropoly compounds in the synthesis of bis(indolyl)alkanes.

heteropoly acids (hpa) and their salts have advantages as catalysts which make them both economically and environmentally attractive, strong br?nsted acidity, exhibiting fast reversible multi-electron redox transformations under rather mild conditions, very high solubility in polar solvents, fairly high thermal stability in the solid states, and efficient oxidizing ability, so that they are imp...

construction and validation of the translation teacher competency test and the scale of students’ perceptions of translation teachers

the major purpose of this study was to develop the translation teacher competency test (ttct) and examine its construct and predictive validity. the present study was conducted in two phases: a qualitative phase as well as a quantitative phase. in the first phase of the study, the author attempted to find out the major areas of competency required for an academic translation teacher. the second...