Publications by authors named "Wenxuan Pei"

(1) Background: The insect mitogenome encodes essential genetic components and serves as an effective marker for molecular identification and phylogenetic analysis in insects due to its small size, maternal inheritance, and rapid evolution. The morphological identification of is challenging, particularly for non-experts. Thus, there is an increasing need for molecular data to improve classification accuracy and phylogenetic analysis.

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The genus Cryptochironomus has a cosmopolitan distribution including over 140 valid described species worldwide. The morphological characteristics and DNA barcode data of Cryptochironomus inflatus Liu, sp. nov.

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(1) Background: Mitochondrial genomes have been extensively employed as a crucial marker in numerous dipteran families for understanding phylogenetics and systematics relations, thereby playing a pivotal role in molecular biology studies. The phylogenetic relationship of the generic complex remains contentious due to the paucity of taxonomic and molecular data. Specifically, the evolutionary relationships among , , and Harnischia are still unclear.

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Six new species of Kieffer, 1918, Liu, , Liu, , Liu, , Liu, , Liu, and Liu, , are described and illustrated based on adult males. The specimens were collected from various water systems in the United States and preserved by Dr. Leonard Charles Ferrington Jr.

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Background: Tibetan Plateau is one of the most typical areas of biodiversity in the world because of its unique environmental and regional units, which breed unique biological communities and concentrate on many unique and rare wild animals and plants. Research on Chironomidae in the Tibetan Plateau is relatively weak. At present, the identification of Chironomidae species mainly depends on male adults, while identification of larvae and pupae is relatively difficult and there is less research on them.

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Atherosclerosis (AS) is associated with increasing lipid peroxidation. Oxidative modification of low-density lipoproteins (ox-LDL) is one most important factors contributing to the pathogenesis and clinical features of AS. The lipid composition influenced by ox-LDL is not known clearly.

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Rhubarb has been used as herbal purgative with a worldwide long history. In traditional Chinese medicine, rhubarb can be stir-baked to scorch to eliminate the purgative function when it is a side effect. Under-scorched rhubarb still has the side effect of purgative, while over-scorched rhubarb can lose all bioactivities.

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This research aimed to develop an FTIR-based method for rapid and low-cost integrated quality assessment of organic-inorganic composite herbs, which are kinds of herbs composed of both organic and inorganic active ingredients or matrix components. A two-step quality assessment route was designed and verified using the example of Indigo Naturalis (). First, the FTIR spectra were used as global chemical fingerprints to identify the true and fake samples.

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Traditional Chinese medicine (TCM) decoction pieces refer to prescription drugs that can be used in clinical or preparation production after processing medicinal herbs. TCM decoction pieces industries are inherited from the culture of TCM and are important because of their independent intellectual property rights. The Chinese Pharmacopoeia (Ch.

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The quality standard of Chinese herbal medicine is the key in quality control, and the establishment of rice processing technology standard of rice fried Codonopsis Radix has important significance for the overall quality control. In this study, the color brightness (L*), red-green chromaticity coordinate (a*), yellow-blue chromaticity coordinate (b*) and total color value(E*ab)were determined by colorimeter and used as the shape indexes. Ethanol extractives, polysaccharide, lobetyolin and 5-hydroxymethyl furfural contents were determined by using high performance liquid chromatography (HPLC) and ultraviolet (UV), and used as chemical indexes in the analysis by normalization distance method.

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To establish an HPLC (high performance liquid chromatography) method for the simultaneous content determination of gallic acid, (+)-catechin, (-)-epicatechin-3-O-gallate, isolindleyin, 4-(4'-hydroxyphenyl)-2-butanone, emodin, chrysophanol, physcion, aloe-emodin, rhein, lindleyin, 4-(4'-hydroxyphenyl)-2-butanone-4'-O-β-D-(2″-O-galloyl-6″-O-cinnamoyl)-glucopyranoside, sennoside A and sennoside B in Rhei Radix et Rhizoma. The analysis was performed on Agilent Zorbax SB-C₁₈ (4.6 mm×150 mm, 5 μm) with 0.

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The whole process quality control and management of traditional Chinese medicine (TCM) decoction pieces is a system engineering, involving the base environment, seeds and seedlings, harvesting, processing and other multiple steps, so the accurate identification of factors in TCM production process that may induce the quality risk, as well as reasonable quality control measures are very important. At present, the concept of quality risk is mainly concentrated in the aspects of management and regulations, etc. There is no comprehensive analysis on possible risks in the quality control process of TCM decoction pieces, or analysis summary of effective quality control schemes.

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The concept of "Quality by design" indicates that good design for the whole life cycle of pharmaceutical production enables the drug to meet the expected quality requirements. Aiming at the existing problems of the traditional Chinese medicine (TCM) industry, the TCM standardization system was put forward in this paper from the national strategic level, under the guidance by the idea of quality control in international manufacturing industry and with considerations of TCM industry's own characteristics and development status. The connotation of this strategy was to establish five interrelated systems: multi-indicators system based on tri-indicators system, quality standard and specification system of TCM herbal materials and decoction pieces, quality traceability system, data monitoring system based on whole-process quality control, and whole-process quality management system of TCM, and achieve the whole process systematic and scientific study in TCM industry through "top-level design-implement in steps-system integration" workflow.

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