نتایج جستجو برای: lc qtof msms
تعداد نتایج: 30214 فیلتر نتایج به سال:
Abstract The accumulation of organophosphorus type herbicides has been observed worldwide in the environment (i.e. soil, water), together with their appearance foods plant origin. This paper reports a new liquid chromatography–isotope dilution–tandem mass spectrometric method (LC-IDMS) for analysis glufosinate (GLUF), glyphosate (GLY) and its main metabolite, aminomethylphosphonic acid (AMPA), ...
Antioxidant activities of the different extracts (n-heptane, chloroform, methanol) from roots and aerial parts Scorzonera veratrifolia by maceration method, as well total phenolic flavonoid content were examined first time in this study. The findings revealed that methanol extract S. exhibited greater DPPH radical scavenging (IC50: 0.62±0.60 mg/mL) iron (III) reduction capacity (1.56±0.03 mM Fe...
The cultivated almond displays a gametophytic self-incompatibility system, which avoids self-fertilization, and it is controlled by multi-allelic locus (S-locus) containing two genes specifically expressed in pistil (S-RNase) pollen (SFB). Studies on almonds with the same S-haplotype but different phenotype pointed to existence of unknown components this system explain its functioning. increase...
Surge in consumption of healthy and safe foods has challenged researchers to develop sensitive, precise, robust detection quantification food contaminants like acrylamide even if they are present trace. Keeping this view, a sensitive analytical method was developed validated for potato-based product (potato cutlet), using LC-MSMS with positive electrospray ionization (+ESI). The consists adding...
Multi-sided markets (MSMs) have proven to be a successful business model in the dynamic electronic commerce environment. There exists variety of MSMs differing their provided features and services for participants. Existing taxonomies often focus on value creation business-to-business transactions. We apply Nickerson et al.’s taxonomy development approach. especially incorporated aspects orches...
The development of a technique combining solid-phase microextraction (SPME) with microbore high-performance liquid chromatography (micro-HPLC)-tandem quadrupole time-of-flight (QTOF) mass spectrometry (MS) for determination of dissolved microcystins in water is reported. Several important parameters affecting the efficiency of SPME extraction of microcystins are investigated. A microbore C18 co...
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