The 520 nm light-induced absorbance change in wild-type and 4 mutant strains of Chlamydomonas reinhardi was investigated. In the wild-type strain the absorbance change is composed of at least 2 components, P520 I and P520 II, sensitized by Systems I and II respectively. Some of the properties of these components can be studied by using the appropriate photosynthetic mutant strain. A group of mu...

Surfactin, one of the most powerful biosurfactants, can be widely applied in agriculture, food, and pharmaceutics. The purpose present study was to establish suitable indicators for a rapid detection method that confirm surfactin productivity cheonggukjang. In study, changes total number bacteria were quantified according fermentation time chenggukjang. Furthermore, physicochemical factors, suc...

Mix**, wait for the end of the reaction (approx. 10 min) and read the absorbances of the solutions (A2). If the reaction has not stopped after 10 min, continue to read the absorbances at 2 min intervals until the absorbance increases constantly over 2 min. Determine the absorbance differences (A2-A1) for both, blank and sample. Subtract the absorbance difference of the blank from the absorbance...

Up to date, no worldwide standard in vitro method has been established for the determination of the sun protection factor (SPF), since there are many problems in terms of its repeatability and reliability. Here, we have studied the problems on the in vitro SPF measurements brought about by the phenomenon called viscous fingering. A spatially periodic stripe pattern is usually formed spontaneous...

Semiconductor silver sulphide (Ag2S) thin films were grown on the glass substrate by chemical bath deposition (CBD). Five deposited at room temperature in a containing an aqueous solution of sulphide. The chemically synthesized Ag2S are annealed 573K for one hour second sample, and two hours third sample. fourth sample exposed to microwave irradiation hour, fifth Surface morphology, photocataly...

The optimum conditions for the antioxidant extraction from maqui berry were determined using a response surface methodology. A three level D-optimal design was used to investigate the effects of three independent variables namely, solvent type (methanol, acetone and ethanol), solvent concentration and extraction time over total antioxidant capacity by using the oxygen radical absorbance capacit...

Biomolecular assays are continually being developed that use progressively smaller amounts of material, often precluding the use of conventional cuvette-based instruments for nucleic acid quantitation for those that can perform microvolume quantitation. The NanoDrop microvolume sample retention system (Thermo Scientific NanoDrop Products) functions by combining fiber optic technology and natura...

UNLABELLED BACKGROUND Noble metallic nanoparticles have prominent optical local-field enhancement and light trapping properties in the visible light region resulting from surface plasmon resonances. RESULTS We investigate the optical spectral properties and the surface-enhanced Raman spectroscopy of two-dimensional distinctive continuous ultrathin gold nanofilms. Experimental results show ...