نتایج جستجو برای: ultraviolet lamp
تعداد نتایج: 50004 فیلتر نتایج به سال:
The traditional parameters used to evaluate dental composites in the laboratory have been working time, polymerization contraction, compressive, tensile, shear, and bond strength, resistance to indentation, water sorption and solubility, leakage, color stability by the 24-hour ultraviolet lamp test, and thermal coefficient of expansion. Other less well documented properties of composites are th...
Ultraviolet B (UVB) is a highly effective, relatively safe, affordable and widely used therapeutic option for moderate psoriasis. Several types of UVB lamp are available to treat psoriasis, both broadband and narrowband, allowing a choice of spectral emission. However despite years of clinical use, the mechanism of action of UVB in clearing psoriasis remained incompletely understood. Moreover, ...
The objective of this research was to establish loop-mediated isothermal amplifications (LAMP) that could be used detect parasitic ciliate Ichthyophthirius multifiliis (I. multifiliis) in freshwater cyprinid fish. Primers were developed from the distinguishing fragments 18S ribosomal RNA I. and LAMP test then evaluate optimize various concentrations chemicals, time temperature. results indicate...
This case study examines the effect that Reynolds number of air flow has on population oflive pathogenic microorganisms during process sterilization using ultraviolet germicidalirradiation (UVGI) lamp in a closed air-duct. With this aim, first discussion is mathematicalmodel which regulates changes to terms percentage populationfor following live microorganisms: Escherichia coli, Mycobacterium ...
background: organophosphorus pesticides are one of the most consumable poisons. such poisons can enter water sources by different routes. since consuming some drinking water containing an amount of poison higher than the standard level, causes undesirable effects on human health. this research aimed to study the effectiveness of eliminating malathion from water by ultraviolet irradiation (uv) ...
The photocatalytic performance of metal-free graphitic carbon nitride (g-C3N4) was examined using visible light-emitting diodes (LEDs). A comparative and parametric study conducted the degradation phenol as a model reaction. g-C3N4 photocatalyst synthesized from melamine thermal condensation, followed by exfoliation that increases catalyst surface area 11 to 170 m2/g. Different characterization...
اسهال ویروسی گاو (bvd) یک عامل بیماری زا است که در گاوها ایجاد عفونت می کند و اهمیت اقتصادی در جهان دارد. این ویروس موجب خسارات های اقتصادی قابل توجه بر صنعت دام پروری می شود. روش rt-lamp تک مرحله ای برای تشخیص ویروس اسهال ویروسی گاو بهینه شد. 4 پرایمر ویژه با استفاده از نرم افراز primerexplorer v4 برای تشخیص 6 جایگاه متمایز بر روی rna هدف قرار گرفته بر روی توالی حفاظت شده از ناحیه5?utr ژنوم وی...
The purpose of ultraviolet (UV) disinfection is to bring end the growth and procreation microorganism. UV reactors are used for drinking water. Our goal current research work was properly locating positions lamps in a three-lamp close conduit water reactor. Three based on vertices four basic types triangles (Equilateral, Right angle, Scalene Isosceles). objective function optimized lamp positio...
The fourth North American Intercomparison of Ultraviolet Monitoring Spectroradiometers was held September 15 to 25, 1997 at Table Mountain outside of Boulder, Colorado, USA. Concern over stratospheric ozone depletion has prompted several government agencies in North America to establish networks of spectroradiometers for monitoring solar ultraviolet irradiance at the surface of the Earth. The m...
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