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  1. No Access

    Article

    Culturable actinomycetes from desert ecosystem in northeast of Qinghai-Tibet Plateau

    In this study, 53 actinomycetes strains were isolated from desert ecosystems located in northeast of Qinghai-Tibet Plateau and grouped into four RFLP patterns. Twenty-six actinomycetes with obvious morphology ...

    Dong Ding, Guichen Chen, Bochan Wang, Qilan Wang, Demei Liu… in Annals of Microbiology (2013)

  2. No Access

    Article

    LC–ESI–MS Determination of 20 Free Amino Acids in Tibetan Medicine Gentiana dahurica with Pre-Column Fluorescence Derivatization

    Concentrations of 20 free amino aicds (FAAs) in a famous Tibetan medicine Gentiana dahurica was first investigated using 1,2-benzo-3,4-dihydrocarbazole-9-ethyl chloroformate (BCEOC) as the pre-column fluorescence...

    **g Sun, Faqiang Li, Wenhua Xu, Guoying Zhou, **mao You, Guichen Chen in Chromatographia (2009)

  3. No Access

    Article

    10-Ethyl-acridine-2-sulfonyl Chloride: A New Derivatization Agent for Enhancement of Atmospheric Pressure Chemical Ionization of Estrogens in Urine

    The extensive metabolism and treatment of low doses of estrone (E1), estradiol (E2) and estriol (E3) in preclinical animal species necessitates a sensitive analytical method to identify or quantify the estroge...

    **mao You, Huaixin Zhao, Zhiwei Sun, Yourui Suo, Guichen Chen in Chromatographia (2009)

  4. No Access

    Article

    Emodin-induced apoptosis in human breast cancer BCap-37 cells through the mitochondrial signaling pathway

    Emodin, a natural anthraquinone compound isolated from the rhizome of rhubarb, is reported to suppress the growth of tumor in many clinical situations. In this study, we focused on the effect of emodin in huma...

    Zhiwei Huang, Guichen Chen, ** Shi in Archives of Pharmacal Research (2008)

  5. No Access

    Article

    Determination of 30 Free Fatty Acids in Two Famous Tibetan Medicines by HPLC with Fluorescence Detection and Mass Spectrometric Identification

    A simple and sensitive high-performance liquid chromatographic (HPLC) method with fluorescence detection and mass spectrometric identification has been developed for analysis of 30 long-chain and short-chain f...

    **g Sun, Guichen Chen, **anen Zhao, Wenhua Xu, Guoying Zhou, Youji Han… in Chromatographia (2007)

  6. No Access

    Article

    Effects of azadirachtin on six inorganic cation distributions in Ostrinia furnacalis (G.)

    Azadirachtin (Az), as a botanical insecticide, is relatively safe and biodegradable. It affects a wide vaariety of biological processes, including the reduction of feeding, suspension of molting, death of larv...

    ** Shi, Zhiwei Huang, Guichen Chen, Li Zhou… in Biological Trace Element Research (2006)

  7. No Access

    Article

    Influence of lanthanum on the accumulation of trace elements in chloroplasts of cucumber seedling leaves

    Influence of La3+ on the accumulation of trace elements (75Se, 56Co, 83Rb, 48V, 95mTc, and 67Ga) in chloroplasts of cucumber seedling leaves was studied by a radioactive multitracer technique. At the same time, c...

    ** Shi, Zhiwei Huang, Guichen Chen in Biological Trace Element Research (2006)

  8. No Access

    Article

    Influence of lanthanum on the uptake of trace elements in cucumber plant

    The effects of La3+ on the uptake of trace elements (Se, Co, V, and Tc) in cucumber plants were studied by a radioactive multitracer technique. It was observed that the uptake and distribution of these trace elem...

    Zhiwei Huang, Guichen Chen, Jiawei Du in Biological Trace Element Research (2003)

  9. No Access

    Article

    Relationship between Qinghai lake level descending and artificial water-consumption

    Qinghai Lake is the largest inland lake in China. It is a closed-drainage saline lake located at 3194m above sea level in the northeastern Qinghai-**zang (Tibet) Plateau. Qinghai Lake region, about 36 ° 15′ – ...

    Min Peng, Guichen Chen, Lihua Zhou in Chinese Geographical Science (1995)