نتایج جستجو برای: uv detection
تعداد نتایج: 631153 فیلتر نتایج به سال:
This letter described ultraviolet UV radiation sensing with ZnO based film bulk acoustic-wave resonator FBAR . The resonant frequency upshifted when there was UV illumination on the FBAR. For 365 nm UV light, the frequency upshift was 9.8 kHz with an intensity of 600 W /cm2, and the detection limit of the sensor was 6.5 nW. The frequency increase in the FBAR UV sensor was proposed to be due to ...
This Application Note describes the development of reliable quality control methods for analysis of individual traditional Chinese medicines (TCMs) and TCM formulations using rapid resolution liquid chromatography with UV-visible and quadrupole mass spectrometry detection. The chromatograms obtained with UV and MS detection for different individual TCMs are compared and the combination of UV an...
determination of uranium in natural water and complex solutions using ion exchange chromatography: a combined procedure using ion exchange chromatography and uv-vis spectrophotometry techniques has been developed to measure uranum in natural water and complex solutions. after conditicing , one hundred milli liters of sample solutions have been passed through an ion exchange column,pachked with ...
A HPLC method with UV detection for quantification of 2,6-diaminopimelic acid (DAPA) in rumen bacteria, duodenal and ileal digesta and faeces is described. Biological samples were hydrolyzed with 6 M HC1 for 20 h at 104±2°C. DAPA was separated after pre-column derivatization with o-phthaldialdehyde (OPA) in the presence of ethanethiol (ESH). DAPA derivative was analyzed using a reversed-phase C...
Ultraviolet (UV) studies in astronomy, cosmology, planetary studies, biological and medical applications often require precision detection of faint objects and in many cases require photon-counting detection. We present an overview of two approaches for achieving photon counting in the UV. The first approach involves UV enhancement of photon-counting silicon detectors, including electron multip...
The branched-chain amino acids (BCAAs) including leucine (Leu), isoleucine (Ile) and valine (Val) play a pivotal role in the human body. Herein, we developed capillary electrophoresis (CE) coupled with conventional UV detector to quantify underivatized BCAAs in two kinds of sport nutritional supplements. For direct UV detection at 195 nm, the BCAAs (Leu, two enantiomers of Ile and Val) were sep...
Electrophoretic separation techniques using microchips have been dramatically improved and several commercial MCE systems have been developed. For example, the Agilent Technologies 2100 Bioanalyzer system is commercially available with a protein separation chip and reagent kit that enables rapid and highly efficient protein separation based on their molecular size [1]. Separation of protein mix...
The major radiation of the sun can be roughly divided into three regions: ultraviolet, visible, and infrared light. Detection in these three regions is important to human beings. The metal-insulator-semiconductor photodetector, with a simpler process than the pn-junction photodetector and a lower dark current than the MSM photodetector, has been developed for light detection in these three regi...
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