Yi Zhou

Chongqing Municipal Academy of Chinese Materia Medica, Ch’ung-ch’ing-shih, Chongqing Shi, China

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Publications (6)1.73 Total impact

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    ABSTRACT: Lamiophlomis rotata is a common wild herb in Tibetan traditional medicine with important medicinal and economic value. The paper examines the wild distributions, exploitation regime, and situations. A variety of research methods, such as literature survey, specimens inspection, market information collection in major Chinese herbal markets, questionnaire of herbalists and employers of local governments and institutions, and field quadrat survey and AcrGIS as well, have been used for this work. Total stock of wild resources of L. rotata is ranging from 3 713.49 tons to 6 896.56 tons (2 519-3 314 t in Qinghai, 490-1 414 t in Gansu, 641-1 167 t in Sichuan, and 422-999 t in Tibet, respectively), acceptable harvest quantity of the herb is ranging from 908-1 675 t per year, and actual harvest quantity is 2 520 t annually far beyond the acceptable harvest quantity. Harvesting quantity of L. rotata is far more than that of acceptable, suggesting that utilization pattern of this wild resource plant is unsustainable. L. rotata seems to act as an indicating plant of degraded ecosystem of high-altitude grassland, shrub grassland, and wetland, and distributes in those degraded and degrading plateau ecosystems, and the plant is facing with pressure of ecological protection and wild resource population degradation. Wild population monitoring and standard cultivation are of importance for although they are far from implementation due to shortage of related basic studies.
    Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica 11/2012; 37(22):3500-5.
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    ABSTRACT: To investigate the appropriate culture medium, process of seeds germination and seedlings growth, and optical measures for seedling management of Notopterygium incisum. Germination time and duration, germination potential and germination ratio were determined through controlled temperature, photoperiod, culture medium and seedling depth in illumination incubators. The appropriate temperature was 15 degrees C, and the most suitable culture medium was A6 (mixture of sawdust, vermiculite, charcoal, and perliet), and the most suitable semination depth is 1-1.5 cm. High-qualified seedlings can be germinated through the dormancy-broken seeds, and soil and other culture mediums with high organic matter content and loosing texture are suitable for germination and seedlings raising of N. incisum.
    Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica 10/2007; 32(18):1841-4.
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    ABSTRACT: To establish scientific and efficient quality control standard of Rhizoma et Radix Notopterygii through two quantitative parameters. The contents of isoimperatorin and volatile oils in 29 commercial samples from 22 localities of Rhizoma et Radix Notopterygii were determined by HPLC and the method in the pharmacopoeia respectively. The data were statistically analyzed. Only 3 of 29 samples met the required standard in the Chinese Pharmacopoeia (2005 edition), 87% of samples newly produced in 2005 not met the standard. Statistics showed that the contents of volatile oils and isoimperatorin should reach 1.63% and 0.17% respectively when the samples meet requirement of criterion with more than 80% probability. The contents of volatile oil and isoimperatorin were not significantly different (P < 0.05) in the samples of 2005 and 2003, while the contents of isoimperatorin were significantly different between Notopterygium incisum and N. forbesii samples. Since the criterion of volatile oils in the Chinese Pharmacopoeia (2005 version) for Rhizoma et Radix Notopterygii is too high to satisfy for most Rhizoma et Radix Notopterygii samples, it is suggested to reduce it to 1.6% (mL x g(-1)). The content of isoimperatorin is proposed to add to the quality standard of Rhizoma et Radix Notopterygii as above 0.2% (mg x g(-1)).
    Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica 05/2007; 32(7):566-9.
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    ABSTRACT: The rhizomes of Notopterygium incisum Ting. ex H. T. Chang and N. forbesii Boiss. are recorded in the pharmacopoeia of the People’s Republic of China under the same name “Qiang-huo”. Valid quality control of Qiang-huo is desirable due to the fact that the wild natural sources of Qiang-huo have almost been exhausted and large regulated cultivation is developing. In the present paper, HPLC fingerprinting was developed to identify and distinguish both species in detail. The unique properties of the HPLC fingerprint were validated by analyzing 15 batches of N. incisum and 11 batches of N. forbesii. A standardized procedure involving liquid chromatography–electrospray ionization–multiple stage mass spectrometry (HPLC-ESI-MSn) was developed to identify the fingerprint components, and a total of eight characteristic peaks were unequivocally identified. An average chromatogram from 15 batches of N. incisum from different geographic sources, considered to be the original and genuine herbal medicine, was first established as the standard fingerprint. The chemical profiles of 11 batches of N. forbesii samples were found to be variable. The HPLC method can differentiate N. incisum from N. forbesii by either the marker compounds notoptol (4) and p-hydroxypenethylanisate (8) or the amounts of nodakenin (1), notopterol (5), and 6′-O-trans-feruloylnodakenin (7). The HPLC fingerprint analysis is specific and may serve for quality identification and comprehensive evaluation of Qiang-huo.
    Chromatographia 09/2006; 64(7):405-411. · 1.44 Impact Factor
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    ABSTRACT: Application of controlled-release nitrogenous fertilizers can improve the efficiency of fertilizers and reduce the environmental pollution. Controlled-release urea (coated urea) is one of the controlled-release nitrogenous fertilizers developed quickly in the recent years. The rate of controlled-release urea pervasion through membrane is the most important index of the capacity of controlled release. There is a maximum absorption at lambda=426 nm with complex in acidic solution, using p-dimethylaminozenzaldehyde as color reagent, and the absorbance exhibits a linear reponses to the urea concentration over the range of 7.5-210 microg x mL(-1). The method for determining the rate of controlled-release urea pervasion through membrane was realized through determining the content of urea in the liquor, the recovery efficiency of the method is 96.1%-103.9%.
    Guang pu xue yu guang pu fen xi = Guang pu 07/2006; 26(6):1151-4. · 0.29 Impact Factor
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    ABSTRACT: Five heavy metals (Hg, Cu, Cd, Pb, Cr) and arsenic (As) contents in 57 samples of from 19 localities in Sichuan, Qinghai and Gansu of Rhizoma et Radix Notopterygii sourcing from two plants Notoperygium incusum and N. forbesii has been analyzed to evaluate the content standard of heavy metal and arsenic for drafting the herbal medicine quality. ICP-AES method was applied to determine As, Cu, Cd, Pb, Cr and CAAS method was applied to determine Hg. Hg can not be determined through CAAS, and little Pb was determined except in limited N. forbesii samples from certain sites, while the contents of Cu in most samples are higher than 20 mg x kg(-1). As in N. forbesii samples, and Cd in N. incisum samples are higher or approximate the limitation of related standard of medicinal plants and production. Cr varies from different localities, ranging from 0.48 to 8.36 mg x kg(-1) for N. incisum and 1.44-8.03 mg x kg(-1) for N. forbesii. Referring to the related standards of medicine and vegetable, the heavy metals and arsenic contents of Rhizoma et Radix Notopterygii samples from traditional producing areas are confirmed the propositional standard, i. e., Pb < or = 5.0 mg x kg(-1), Cd < or = 0.3 mg x kg(-1), Hg < or = 0.2 mg x kg(-1), Cu < or = 28.0 mg x kg(-1), As < or = 2.0 mg x kg(-1), and Cr < or = 1.0 mg x kg(-1). Of these five heavy metals, Cu is much over the limitation standard, which suggested that GAP base of Rhizoma et Radix Notopterygii must be selected in lower Cu environmental condition in main producing area.
    Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica 06/2006; 31(12):978-80, 994.