Luminescence research and its relation to ultraweak cell radiation

Summary The fundamental laws of photochemistry and the essential results of experimental research on ultraweak cell radiation are presented. By comparing all the facts it can be concluded that the phenomena discussed may arise from a variety of possible reactions and sources. Recombination reactions of certain radicals actually do release sufficient energy to generate UV-photons of the intensity under consideration. On the other hand, stimulated emission cannot be excluded in view of the distinct deviation of the radiation field from thermal equilibrium. There exist, however, various other candidates, such as direct emitters like flavins, indoles, porphyrins, carbonyl derivatives and aromatic compounds, and molecular oxygen and its various species, as well as collective molecular interactions, e.g. dimole or exciplex transitions, triplet-triplet annihilation, collective hydrolysis, electric field effects in membranes, etc.Careful biochemical and biophysical experiments are still necessary to find answers to all the questions that remain; not only individual problems have to be solved, but it is important to keep in mind the interrelationships between certain reactions.     

Physical aspects of delayed luminescence inAcetabularia acetabulum

Delayed photo-induced luminescence has been studied inAcetabularia acetabulum individuals. The number of photons re-emitted when the wavelength, the intensity, or the duration of the incident radiation were varied are reported for 10 individuals. Reproducibility of the measurements in the same and in different individuals was good. The association between the incident radiation and photon re-emission was found to be non-linear. The relaitonship between the quantities involved in the phenomenon is discussed and a phenomenological equation describing the relationship is presented.     

荧光素酶的分类、结构与应用

荧光素酶是生物体内催化荧光素或者脂肪醛氧化发光的一类酶的总称.荧光素酶可以从细菌、萤火虫、海星等提取出来.随着研究的不断深入,荧光素酶应用到了分子生物学、医学、微生物检测等领域.文章就荧光素酶的种类、结构及应用进行了研究.