Tripterygium Wilfordii Hooks. f (TW) also called yellow vine, yellow vine wood, yellow wax vine, breakgut herb etc., belongs to Galactia genus, its medicinal parts mostly belong to the wooden part of the double-layer ...Tripterygium Wilfordii Hooks. f (TW) also called yellow vine, yellow vine wood, yellow wax vine, breakgut herb etc., belongs to Galactia genus, its medicinal parts mostly belong to the wooden part of the double-layer decortical root. Traditional Chinese medicine (TCM) holds that it has the function of clearing Heat and removing toxin, dispelling Wind to fr- ee collateral, relaxing tendon to activate blood circulation, subsiding swelling and analgesia, insecticide and hemostasis. The studies on botanical resources, chemical ingredients and pharmacology of TW are briefly introduced as follows.展开更多
Objective Patients and doctors often have questions about the equivalence of traditional and machinery decoctions. In this article, using Da-cheng-qi Decoction（DCQD） as a model of formula, traditional decoction（TD...Objective Patients and doctors often have questions about the equivalence of traditional and machinery decoctions. In this article, using Da-cheng-qi Decoction（DCQD） as a model of formula, traditional decoction（TD）, machinery decoction under high pressure（MDHP）, and machinery decoction under normal pressure（MDNP） were compared. Methods For chemical components, HPLC fingerprints were established and evaluated using AHP combined with CRITIC weighing method; For animals＇ effects, the experiments of small intestinal propulsion were conducted; For clinical effects, a randomized clinical trial（RCT） was designed and performed. Results Although there were some differences between TD and MDNP in chemical ingredients, there was no significant difference in animal experiments and clinical trials（P 〉 0.05）. Conclusion The traditional and machinery decoctions of DCQD could be used bioequivalently.展开更多
Traditional Chinese Medicine prescription Suanzaoren decoction (SZRD) is composed of Ziziphi Spinosae Semen, Chuanxiong Rhizoma, Anemarrhenae rhizoma, Poria and Licorice. It was used to treat central nervous system di...Traditional Chinese Medicine prescription Suanzaoren decoction (SZRD) is composed of Ziziphi Spinosae Semen, Chuanxiong Rhizoma, Anemarrhenae rhizoma, Poria and Licorice. It was used to treat central nervous system diseases such as insomnia and anxiety for thousands of years. This paper aims to systematically understand varieties and quantities of compounds and clarify chemical components of SZRD, subsequently to further provide the reference for phytochemistry and pharmacology researches of SZRD. Our results showed that SZRD contained 145 components, including flavonoids, triterpenoids, steroids, coumarins, phthalides, and volatile oils, etc., while five-single herbs contain 1104 components. Only in terms of compound number, there were 80 common components in SZRD and its five herbs, which accounted for 6.8% of total compounds in all 5 herbs and 55.2% of compounds in SZRD. The components of SZRD were not simply the sum of one in every single herb. It is necessary to perform parallel studies among SZRD and its herbs. This review discussed the problems that existed in the chemical research of SZRD and pointed out the direction for its further research.展开更多
There is fine and uniform clay with aluminous and ferrous cementation in the red clay found in Guigang, Guangxi. It has the characteristics of shrinkage outwardly, rigid upper but soft lower and well grown fissure. I...There is fine and uniform clay with aluminous and ferrous cementation in the red clay found in Guigang, Guangxi. It has the characteristics of shrinkage outwardly, rigid upper but soft lower and well grown fissure. In addition there are engineering characteristics such as high water content, low compactness and low compressibility, high strength and high contractility but slight expansibility. This paper discusses the red clay's engineering characteristics and its change regulation with depth by analyzing changes in the red clay's grain size composition, mineralogical constitution, and chemical composition.展开更多
In this study, seawater was pumped up from 150, 200, 300, 500 and 1000 m in the South China Sea and analyzed to make certain what depth should deep-sea water (DSW) be pumped up for medicinal usage. The pumping depth o...In this study, seawater was pumped up from 150, 200, 300, 500 and 1000 m in the South China Sea and analyzed to make certain what depth should deep-sea water (DSW) be pumped up for medicinal usage. The pumping depth of DSW was determined on the basis of chemical ingredients. The analyses of inorganic elements and dissolved organic matter (DOM) were performed by inductively coupled plasma mass spectrometry (ICP-MS) and ultra performance liquid chromatography-mass spectrometry (UPLC-MS) respectively. The raw data were used for hierarchical cluster analysis (HCA) and principal component analysis (PCA). The results showed that seawater pumped up from 500 m and 1000 m was similar in their chemical ingredients, and was different from the seawater pumped up from other depths. These results indicated that seawater from more than 500 m depth had relatively stable chemical ingredients and could be used as DSW in the South China Sea.展开更多
The chemical ingredients, morphological structure and properties of mulberry fiber have been researched. The results show that the mulberry fiber is cellulose fiber. The crystal structure of mulberry fiber is cellulos...The chemical ingredients, morphological structure and properties of mulberry fiber have been researched. The results show that the mulberry fiber is cellulose fiber. The crystal structure of mulberry fiber is cellulose I and the crystal cell belongs to the monoelinic system. The mulberry fiber crystal degree is 62.9% and orientation degree is 43.7%, the fineness of mulberry fiber is 2.3- 3.9 dtex, the length of the single fiber is 28 - 47 mm, the breaking strength of mulberry fiber is about 2.93 cN/dtex, and the initial modulus is about 76.82 cN/dtex.展开更多
The electrochemical behaviour and passive film properties of Fe-Cr-Mo-W-C-B-Y amorphous alloys in acetic acid solution were investigated. The potentiodynamic polarisation and Nyquist curves demonstrated that W additio...The electrochemical behaviour and passive film properties of Fe-Cr-Mo-W-C-B-Y amorphous alloys in acetic acid solution were investigated. The potentiodynamic polarisation and Nyquist curves demonstrated that W addition signifi- cantly enhanced the corrosion resistance. Mott-Schottky plots and angle-resolved X-ray photoelectron spectra indicated that passive films with different W contents exhibited dipolar （p-n） semiconducting characteristics separated by fiat-band potentials. The outer and inner oxide layers of the passive films were modified by reducing the acceptor and donor densities. Moreover, W addition favoured the formation of a thicker and more stable passive film to inhibit the dissolution of alloy elements.展开更多
Sixteen compounds, including two new natural products(1 and 2), were obtained from the twigs of Illicium angustisepalum. The structures were elucidated based on NMR, MS, IR data and optical rotation values. Compounds ...Sixteen compounds, including two new natural products(1 and 2), were obtained from the twigs of Illicium angustisepalum. The structures were elucidated based on NMR, MS, IR data and optical rotation values. Compounds 4,5,6 and 8 displayed moderate antibacterial activities against clinical isolates; compounds 4,5,8,9 and 15 protected neural cells against oxidative stress; and compounds 10 and 14 exhibited anti-acetylcholinesterase activity.展开更多
文摘Tripterygium Wilfordii Hooks. f (TW) also called yellow vine, yellow vine wood, yellow wax vine, breakgut herb etc., belongs to Galactia genus, its medicinal parts mostly belong to the wooden part of the double-layer decortical root. Traditional Chinese medicine (TCM) holds that it has the function of clearing Heat and removing toxin, dispelling Wind to fr- ee collateral, relaxing tendon to activate blood circulation, subsiding swelling and analgesia, insecticide and hemostasis. The studies on botanical resources, chemical ingredients and pharmacology of TW are briefly introduced as follows.
基金Longhua Medical Project(LYTD-14)National special research foundation of TCM(No.201007010)
文摘Objective Patients and doctors often have questions about the equivalence of traditional and machinery decoctions. In this article, using Da-cheng-qi Decoction（DCQD） as a model of formula, traditional decoction（TD）, machinery decoction under high pressure（MDHP）, and machinery decoction under normal pressure（MDNP） were compared. Methods For chemical components, HPLC fingerprints were established and evaluated using AHP combined with CRITIC weighing method; For animals＇ effects, the experiments of small intestinal propulsion were conducted; For clinical effects, a randomized clinical trial（RCT） was designed and performed. Results Although there were some differences between TD and MDNP in chemical ingredients, there was no significant difference in animal experiments and clinical trials（P 〉 0.05）. Conclusion The traditional and machinery decoctions of DCQD could be used bioequivalently.
文摘Traditional Chinese Medicine prescription Suanzaoren decoction (SZRD) is composed of Ziziphi Spinosae Semen, Chuanxiong Rhizoma, Anemarrhenae rhizoma, Poria and Licorice. It was used to treat central nervous system diseases such as insomnia and anxiety for thousands of years. This paper aims to systematically understand varieties and quantities of compounds and clarify chemical components of SZRD, subsequently to further provide the reference for phytochemistry and pharmacology researches of SZRD. Our results showed that SZRD contained 145 components, including flavonoids, triterpenoids, steroids, coumarins, phthalides, and volatile oils, etc., while five-single herbs contain 1104 components. Only in terms of compound number, there were 80 common components in SZRD and its five herbs, which accounted for 6.8% of total compounds in all 5 herbs and 55.2% of compounds in SZRD. The components of SZRD were not simply the sum of one in every single herb. It is necessary to perform parallel studies among SZRD and its herbs. This review discussed the problems that existed in the chemical research of SZRD and pointed out the direction for its further research.
文摘There is fine and uniform clay with aluminous and ferrous cementation in the red clay found in Guigang, Guangxi. It has the characteristics of shrinkage outwardly, rigid upper but soft lower and well grown fissure. In addition there are engineering characteristics such as high water content, low compactness and low compressibility, high strength and high contractility but slight expansibility. This paper discusses the red clay's engineering characteristics and its change regulation with depth by analyzing changes in the red clay's grain size composition, mineralogical constitution, and chemical composition.
基金supported by Special Fund for Marine Scientific Research in the Public Interest (2010-05024)
文摘In this study, seawater was pumped up from 150, 200, 300, 500 and 1000 m in the South China Sea and analyzed to make certain what depth should deep-sea water (DSW) be pumped up for medicinal usage. The pumping depth of DSW was determined on the basis of chemical ingredients. The analyses of inorganic elements and dissolved organic matter (DOM) were performed by inductively coupled plasma mass spectrometry (ICP-MS) and ultra performance liquid chromatography-mass spectrometry (UPLC-MS) respectively. The raw data were used for hierarchical cluster analysis (HCA) and principal component analysis (PCA). The results showed that seawater pumped up from 500 m and 1000 m was similar in their chemical ingredients, and was different from the seawater pumped up from other depths. These results indicated that seawater from more than 500 m depth had relatively stable chemical ingredients and could be used as DSW in the South China Sea.
基金Doctorate Foundation of Xi'an Polytechnic University and the 2006 Year Research Project of Shaanxi Educational Bureau , China (No.06JK284)
文摘The chemical ingredients, morphological structure and properties of mulberry fiber have been researched. The results show that the mulberry fiber is cellulose fiber. The crystal structure of mulberry fiber is cellulose I and the crystal cell belongs to the monoelinic system. The mulberry fiber crystal degree is 62.9% and orientation degree is 43.7%, the fineness of mulberry fiber is 2.3- 3.9 dtex, the length of the single fiber is 28 - 47 mm, the breaking strength of mulberry fiber is about 2.93 cN/dtex, and the initial modulus is about 76.82 cN/dtex.
基金supported by the National Natural Science Foundation of China(Nos.51601129 and 51401051)the Shanghai Pujiang Program(16PJ1410000)
文摘The electrochemical behaviour and passive film properties of Fe-Cr-Mo-W-C-B-Y amorphous alloys in acetic acid solution were investigated. The potentiodynamic polarisation and Nyquist curves demonstrated that W addition signifi- cantly enhanced the corrosion resistance. Mott-Schottky plots and angle-resolved X-ray photoelectron spectra indicated that passive films with different W contents exhibited dipolar （p-n） semiconducting characteristics separated by fiat-band potentials. The outer and inner oxide layers of the passive films were modified by reducing the acceptor and donor densities. Moreover, W addition favoured the formation of a thicker and more stable passive film to inhibit the dissolution of alloy elements.
文摘Sixteen compounds, including two new natural products(1 and 2), were obtained from the twigs of Illicium angustisepalum. The structures were elucidated based on NMR, MS, IR data and optical rotation values. Compounds 4,5,6 and 8 displayed moderate antibacterial activities against clinical isolates; compounds 4,5,8,9 and 15 protected neural cells against oxidative stress; and compounds 10 and 14 exhibited anti-acetylcholinesterase activity.
