Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 7 de 7
Filtrar
Mais filtros










Base de dados
Intervalo de ano de publicação
1.
Chem Commun (Camb) ; 57(79): 10250-10253, 2021 Oct 05.
Artigo em Inglês | MEDLINE | ID: mdl-34528652

RESUMO

The first example of Rh-substituted organic-inorganic hybrid arsenotungstate [H2N(CH3)2]8{[Na(H2O)4]NaAs2W22(CH3COO)2O76 Rh2(N(CH3)2)2}·H2O (1) synthesised in an aqueous solution by the conventional method is reported. Two [Rh(N(CH3)2)]3+ fragments are imbedded into the vacancy of the [NaAs2W22(CH3COO)2O76]15- unit by Rh-As bonds [2.439(1) Å], which are observed in POM chemistry for the first time.

2.
Chem Commun (Camb) ; 52(95): 13787-13790, 2016 Dec 11.
Artigo em Inglês | MEDLINE | ID: mdl-27826608

RESUMO

Two unprecedented polytantalotungstates (POTTs), Cs16K16Na4[Ta18P12W90(OH)6(H2O)2O360]·24H2O (1) and Cs26K2H2[Yb2Ta18P12W90(OH)6(H2O)16O360]·52H2O (2) based on the largest {Ta18} and {Ta18Yb2} clusters, respectively, were hydrothermally synthesized. A photocatalytic study revealed that 1 and 2 exhibit significant ultraviolet photocatalytic water splitting activity.

3.
Zhongguo Zhong Yao Za Zhi ; 34(5): 564-6, 2009 Mar.
Artigo em Chinês | MEDLINE | ID: mdl-19526783

RESUMO

OBJECTIVE: To establish the quality standards of roasted ginger and charry ginger prepared from dried ginger. METHOD: The basic quality information of roasted ginger and charry ginger investigated by analysis of marketed samples. Ten batches of two roasted ginger and charry ginger were prepared in medium-scale from four main growth places by the processed criterion. The quality information includes contents of ash, acid-insoluble ash, water-soluble extract and 6-gingerol. The content of 6-gingerol were determined by HPLC method. RESULT: The contents of total ash, acid-insoluble ash and water-soluble extract in processed ginger from medium-scale production were 6.3% - 7.0%, 0.3% - 0.7% and 22.11% - 41.61%, and that in charry ginger were 5.0% - 6.0%, 0.4 - 0.6 % and 20.94% - 44.92%, respectively. The contents of 6-gingerol in roasted ginger from medium-scale production and market samples were 1.05 -5.34 mg x g(-1) and 1.01-4.81 mg x g(-1), and those indexes in charry ginger were 0.43-3.81 mg x g(-1) and 0.44-3.07 mg x g(-1), respectively. Total ash, acid-insoluble ash and water-soluble extract of the two ginger processed products had no obvious difference in batch-to-batch,but the contents of 6-gingerol were closely related to their growth places. CONCLUSION: The above data provide evidences for production and quality control of ginger processed products.


Assuntos
Cromatografia Líquida de Alta Pressão/métodos , Medicamentos de Ervas Chinesas/química , Gengibre/química , Catecóis/química , Medicamentos de Ervas Chinesas/normas , Álcoois Graxos/química , Controle de Qualidade
4.
Zhongguo Zhong Yao Za Zhi ; 33(8): 884-8, 2008 Apr.
Artigo em Chinês | MEDLINE | ID: mdl-18619343

RESUMO

OBJECTIVE: To establish the processing method of fructus evodiae and its standard for quality control, toxicity aspects and pharmacodynamics were carried out at the same time. METHOD: In the studies of processing techniques, the optimized technical parameters were determined by the contents of evodiamine and evodine. And the acute toxicity and pharmacodynamics were studied by rats. RESULT: The process was that the liquorice-processed fructus evodiae was wetted by liquorice decoction by sixth of raw fructus evodiae (V/W) and fried below 230 degrees C. The method of detecting the contents of evodiamine and evodine was that Alltima ODS C18 (4.6 mm x 250 mm, 5 microm); mobile phase acetonitrile-water-tetrahydrofuran-phosphoric acid (51:48: 1: 0.05); column temperature 25 degrees C; mobile rate 0.8 mL x min(-1); wave length 225 nm. The toxicity experimentation show that rats didnt show any notable changes after affused the raw material and the processed fructus evodiae's decotion 40 g x kg(-1) b. w. at one time seven days constantly. The analgesic effect was observed after 0.6 g (material) x kg(-1) (weight) b. w. CONCLUSION: The toxicity of the raw material and the processed one were low and the liquorice-processed fructus evodia analgesic effect was good.


Assuntos
Glycyrrhiza/química , Rutaceae/química , Analgésicos/isolamento & purificação , Analgésicos/farmacologia , Analgésicos/uso terapêutico , Analgésicos/toxicidade , Animais , Cromatografia , Medicamentos de Ervas Chinesas/isolamento & purificação , Medicamentos de Ervas Chinesas/farmacologia , Medicamentos de Ervas Chinesas/uso terapêutico , Medicamentos de Ervas Chinesas/toxicidade , Feminino , Modelos Lineares , Masculino , Camundongos , Camundongos Endogâmicos ICR , Dor/tratamento farmacológico , Reprodutibilidade dos Testes , Temperatura
5.
Zhongguo Zhong Yao Za Zhi ; 32(12): 1149-54, 2007 Jun.
Artigo em Chinês | MEDLINE | ID: mdl-17802873

RESUMO

OBJECTIVE: To investigate the equivalent relationship between granule for clinical prescription and clincal decoction by use of fructus evodiae as a demonstrated object. METHOD: Compared the equivalent ratio relationship of granule for clincal prescription and clincal decoction by determination of evodiamine, rutaecarpine, evodine, total alkaloids and dried extract ratio as markers, ten batches reference decoctions were prepared according to clinical usage as evaluation standards, common-use processed fructus evodiae products, such as salt-processed fructus evodiae, liquorice-proccesed fructus evodiae, as researching objects, and finally validated by pharmacological trials. RESULT: Equivalent ratios of granule for clical prescription to clincal decoction are about two in all processed products, and the pharmacological evaluation showed no siginificant difference in this ratio. CONCLUSION: This equivalent ratio model could be referenced in the production. But, it must be noticed that different herbal medicines perhaps have different equivalent ratio, which should be studied further according to its techniques and production conditions, and finally need to be revalidated by clinical trial.


Assuntos
Medicamentos de Ervas Chinesas/química , Medicamentos de Ervas Chinesas/farmacologia , Evodia/química , Limiar da Dor/efeitos dos fármacos , Alcaloides/análise , Animais , Medicamentos de Ervas Chinesas/isolamento & purificação , Feminino , Frutas/química , Temperatura Alta , Alcaloides Indólicos/análise , Masculino , Camundongos , Camundongos Endogâmicos ICR , Extratos Vegetais/análise , Plantas Medicinais/química , Quinazolinas/análise , Tecnologia Farmacêutica/métodos
6.
Artigo em Chinês | MEDLINE | ID: mdl-15281455

RESUMO

OBJECTIVE: To observe the ultrastructure of pharyngeal armature of 7 species of sandflies in China. METHODS: The pharyngeal armature of various sandflies were studied by scanning electron microscopy. RESULTS: The pharyngeal armature of sandfly consisted of pointed-teeth with various shape, number and arrangement among different species. CONCLUSION: Such differences may provide the morphological proof for identification of species.


Assuntos
Faringe/ultraestrutura , Psychodidae/classificação , Psychodidae/ultraestrutura , Animais , Feminino , Microscopia Eletrônica de Varredura
7.
Artigo em Chinês | MEDLINE | ID: mdl-15830857

RESUMO

OBJECTIVE: To observe the effect of Phlebotomus chinensis control including insecticide residual spraying in the habitats and bathing for dogs on the transmission of visceral leishmaniasis in Nanping of Sichuan Province. METHODS: Alpha-methrin with a dosage of 50 mg/m2 was sprayed in the wild caves and 2.5% deltamethrin wettable power at a concentration of 250 mg/L was applied for dog bathing in the villages. The density of sandflies in the natural caves was examined and data on the incidence of visceral leishmaniasis were collected from epidemiological survey following the sandfly control measures. RESULTS: The density of sandflies has been considerably reduced after the chemical spraying in caves, the important habitats of the sandflies. By both the cave spraying and bathing for dogs since 1993, the reported human cases of leishmaniasis also decreased. CONCLUSION: Measures for sandfly control including insecticide spraying in the habitats and bathing for dogs with insecticide solution can significantly reduce the sandfly density, and can contain the transmission of visceral leishmaniasis in the endemic area.


Assuntos
Doenças do Cão/prevenção & controle , Controle de Insetos , Leishmaniose Visceral/transmissão , Leishmaniose Visceral/veterinária , Psychodidae/fisiologia , Adolescente , Adulto , Animais , Criança , Pré-Escolar , Reservatórios de Doenças , Doenças do Cão/parasitologia , Doenças do Cão/transmissão , Cães , Humanos , Lactente , Insetos Vetores/parasitologia , Inseticidas , Leishmaniose Visceral/prevenção & controle , Pessoa de Meia-Idade , Nitrilas , Piretrinas
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...