نتایج جستجو برای: light conditions
تعداد نتایج: 1207442 فیلتر نتایج به سال:
Background and Objective: Photodynamic therapy is a treatment that uses photosensitizer and intense visible light. When photosensitizers get exposed to a specific light wavelength (preferentially in the red region), they produce reactive oxygen species that are toxic to cells. Recently, attention has been focused on porphyrins and their analogs as photosensitizers. Zn (II) tetrapyridinoporphyra...
Chlormequat chloride (CCC) as one of the most important growth retardants has been used for manipulation of growth and yield of cereal crops; however, the effect of CCC has not yet been well understood under drought stress conditions. Therefore, one greenhouse and a field experiment were conducted to examine the effects of CCC on yield and yield components of wheat in drought conditions at Coll...
the photocatalytic degradation of nonionic surfactant triton x-100 was studied by a batch process using znocommercial powders as the catalyst on irradiation with uv light and its behaviour comparatively with respect tozno nanoparticles with diameter size 20 nm. the effects of different conditions such as catalyst type, amount ofthe photocatalyst, ph of the system, initial concentration and elec...
Background and aims: Human beings are exposed to various light effects. Light can be effective in Cognition, human behavior, visual comfort, health and well-being. The purpose of this study was to Comparative Survey on the effect of fluorescent lamps and LED color temperature on staffs Cognitive Performance Indicators at the office. Methods: In this interventional study, 8 subjects including 2...
Z. Naturforsch. 46c, 542-548 (1991); received February 13, 1991 Blue-Light Photoreceptor, Chlorophyll Synthesis, Desmarestia aculeata, Green-Light Photo receptor, Nitrate The chlorophyll synthesis in the brown algae Desmarestia aculeata is affected by light quali ty and by the nutrient state in the medium before the illumination. Pulses of 5 min of red, green and blue light together with 200 ...
in order to examine the ecological conditions and characteristics of fraxinus excelsior l. in the northern forests of iran 6 main areas as well as some miscellaneous ones , have been selected in the region respectively in : lomir2, shafaroud , park - e-noor , ahlam , alandan and noor.
چکیده توان بالقوه تجاری سلولازها و کاربردهای گوناگون آن ها در بسیاری از صنایع انگیزه ای قوی برای تحقیق در این زمینه طی چند دهه گذشته بوده است. با توجه به کاربردهای فراوان این آنزیم در صنایع غذایی? در این پژوهش تصمیم به جداسازی ریزسازواره های تولید کننده سلولاز از خاک درختان انار، انگور، خرمالو و گردو حیاط دانشکده کشاورزی تربیت مدرس، گرفته شد. در این بین خاک درخت خرمالو به دلیل دارا بودن تعداد ...
In view of evident changes in the reaction of European beech (Fagus sylvatica L.) to environmental changes, five plots with young trees of the same age were established and studied on natural beech sites. Beech trees were equally distributed along the light gradient and were divided according to light conditions. The parameter used for evaluation of light conditions was the indirect site factor...
Manganese toxicity occurs in many agricultural and natural ecosystems under the various soil conditions such as the nature of substrate, acidity, flooding or vicinity to the mining areas. The objective of this work was to study the effects of excess Mn in the growth medium on three important crop species, namely rice (Oryza sativa L. cv. T. Hashemi), maize (Zea mays L. cv. SC.704) and sunflower...
The rail track is one of the most important elements of a railway system. During the passage of trains, the rails are subjected to contact load that comes from the wheels of the train. The railway track often fails in service due to wear caused by contact fatigue and other wear damage mechanisms that could also limit the life span of the railway infrastructure and railway vehicle. The aim of t...
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