摘要:

Abstract—Illumination of gametes of the American sea urchin with visible light from a phototherapy unit causes abnormal development. Filters prevent these embryotoxic effects and permit their separation from the therapeutic effect of these lights, i.e. conversion of bilirubin to water‐soluble produ

ISSN:0031-8655    

DOI:10.1111/j.1751-1097.1981.tb04308.x

出版商:Blackwell Publishing Ltd    

年代:1981

数据来源: WILEY

摘要:

Abstract—It has been reported that caffeine decreases UV‐enhanced reactivation of UV‐irradiatedHerpes simplexvirus in CV‐1 monkey kidney cells. That occurred when there was no delay between cell irradiation and virus infection. In the present study, virus infection was delayed following cell irradiation to allow an ‘induction’period separate from the ‘expression’period which occurs during the virus infection. Thus, the effects of caffeine on ‘induction’and ‘expression’could be determined separately. Caffeine increased the expression of UV‐enhanced reactivation, while causing a small decrease in the ‘inducti

ISSN:0031-8655    

DOI:10.1111/j.1751-1097.1981.tb04309.x

出版商:Blackwell Publishing Ltd    

年代:1981

数据来源: WILEY

摘要:

Abstract—The quantum yield of the photodynamic inactivation of lysozyme increases in the sequence acridine orange, methylene blue, proflavine and acriflavine (1:5:6:12). At least up to protein concentrations of 0.1 mM, singlet oxygen is exclusively responsible for the inactivation of the enzyme. For methylene blue, acriflavine and proflavine the quantum yields decrease considerably with increasing dye concentrations. From measurements in H2O and D2O buffer solutions it was concluded that in the case of methylene blue the effect is mainly caused by the quenching of singlet oxygen [rate constant (3–4) × 108M−1s−1]. For the acridine sensitizers both singlet oxygen and dye triplet quenching processes have to be taken into consideration. It has been found that all sensitizers act as competitive inhibitors of the enzymatic reaction of lysozyme. However, the dye‐protein interaction near the active center cannot be responsible for the observed dye self‐quen

ISSN:0031-8655    

DOI:10.1111/j.1751-1097.1981.tb04310.x

出版商:Blackwell Publishing Ltd    

年代:1981

数据来源: WILEY

摘要:

Abstract—A method of analysis for etioplast pigments by high‐performance liquid chromatography is reported. The method is suitable for separation of protochlorophyllides, chlorophyllides, carotenoids and several forms of Ch

ISSN:0031-8655    

DOI:10.1111/j.1751-1097.1981.tb04311.x

出版商:Blackwell Publishing Ltd    

年代:1981

数据来源: WILEY

摘要:

Book reviewed in this article:The Effects of Constant Light on Visual Processes.Edited by T. P. Williamsand B. N. Baker. Plenum Press, New York, 1980. 455 pp. $45.00.Radiation Biology and Chemistry: Research Developments.Edited by H. E. Edwards, S. Navaratnam, B. J. Parsonsand G. O. Phillips. Elsevier Scientific, Amsterdam, 1979. 505 pp. $78.00

ISSN:0031-8655    

DOI:10.1111/j.1751-1097.1981.tb04312.x

出版商:Blackwell Publishing Ltd    

年代:1981

数据来源: WILEY