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Boletin De La Sociedad Chilena De Quimica最新文献

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A PETHIDINE SELECTIVE POLYMERIC MEMBRANE ELECTRODE 一种聚吡啶选择性膜电极
Boletin De La Sociedad Chilena De Quimica Pub Date : 2002-06-01 DOI: 10.4067/S0366-16442002000200013
Z. H. Liu, M. Wen, Yun Yao, J. Xiong
{"title":"A PETHIDINE SELECTIVE POLYMERIC MEMBRANE ELECTRODE","authors":"Z. H. Liu, M. Wen, Yun Yao, J. Xiong","doi":"10.4067/S0366-16442002000200013","DOIUrl":"https://doi.org/10.4067/S0366-16442002000200013","url":null,"abstract":"Se describe un nuevo electrodo de membrana basado en poli (vinilcloruro) con el complejo de asociacion ionica demerol-Reinikato como sitio de intercambio para la determinacion de demerol clorhidrato, tanto en inyecciones como en tabletas, en el cual se usa ftalato de dibutilo como plastificante. La respuesta lineal cubre el rango de concentracion 1%10-5i1%10-3 M con una pendiente de 53.50 mV/decada. El rango practico de pH fue 2 i 8. El limite mas bajo de deteccion fue de 4.36%10-6 M. Hubo una interferencia insignificante de un numero de cationes inorganicos y organicos y de algunos excipientes comunes de drogas. El electrodo propuesto ha sido aplicado exitosamente para determinar el clorhidrato de petidina en tabletas e inyecciones. Los resultados estan bien correlacionados con aquellos obtenidos por el procedimiento estandar de la Farmacopea de estados Unidos","PeriodicalId":309054,"journal":{"name":"Boletin De La Sociedad Chilena De Quimica","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127996576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
EFFECT OF CHLORINE PRECURSOR IN SURFACE AND CATALYTIC PROPERTIES OF Fe/TiO2 CATALYSTS 氯前驱体对Fe/TiO2催化剂表面及催化性能的影响
Boletin De La Sociedad Chilena De Quimica Pub Date : 2002-06-01 DOI: 10.4067/S0366-16442002000200017
G. Pecchi, P. Reyes, T. López, R. Gómez, A. Moreno, J. Fierro
{"title":"EFFECT OF CHLORINE PRECURSOR IN SURFACE AND CATALYTIC PROPERTIES OF Fe/TiO2 CATALYSTS","authors":"G. Pecchi, P. Reyes, T. López, R. Gómez, A. Moreno, J. Fierro","doi":"10.4067/S0366-16442002000200017","DOIUrl":"https://doi.org/10.4067/S0366-16442002000200017","url":null,"abstract":"Titania-supported iron (1wt%) catalysts were prepared by the sol-gel method using different gelation pH (3 and 9), metal precursors (FeCl2 and FeCl3) and calcination temperatures (873 and 1073K). Characterization data of calcined catalysts revealed that in all samples the dominant iron species is Fe 3+ and the crystalline phase of the TiO2 substrate depends on the gelation pH and the metal precursor used. It was found that in the Fe/TiO2 ex-FeCl3 samples an important part of the iron ions became inserted in titania lattice, which makes the anatase phase stable even at high calcination temperatures. The solids were tested in the combustion of methane under stoichiometric conditions at atmospheric pressure. It was observed that the Fe/TiO2 ex-FeCl2 sample displays the highest activity. This behaviour is explained on the basis of the highest fraction of iron oxide deposited on the external surface of the catalyst particles.","PeriodicalId":309054,"journal":{"name":"Boletin De La Sociedad Chilena De Quimica","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123145518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
URIC ACID REACTION WITH DPPH RADICALS AT THE MICELLAR INTERFACE 尿酸在胶束界面与DPPH自由基反应
Boletin De La Sociedad Chilena De Quimica Pub Date : 2002-06-01 DOI: 10.4067/S0366-16442002000200010
E. Abuin, E. Lissi, P. Ortiz, C. Henríquez
{"title":"URIC ACID REACTION WITH DPPH RADICALS AT THE MICELLAR INTERFACE","authors":"E. Abuin, E. Lissi, P. Ortiz, C. Henríquez","doi":"10.4067/S0366-16442002000200010","DOIUrl":"https://doi.org/10.4067/S0366-16442002000200010","url":null,"abstract":"El acido urico es un importante antioxidante hidrosoluble. En este trabajo se muestra que es capaz de reaccionar con radicales liposolubles (difenilpicrilhidracil, DPPH) en la interface de soluciones micelares. La velocidad del proceso sigue el orden micelas cationicas > mezcla etanol:buffer > micelas neutras micelas anionicas Estos resultados pueden racionalizarse en terminos de la compartimentalizacion de ambos reactantes en diferentes microfases y del efecto que ejercen las interacciones electrostaticas sobre el acceso del anion urato a la interface micelar. Experimentos disenados para evaluar una posible regeneracion del radical derivado del a-tocoferol por el anion urate entregaron resultados negativos, indicando que este anion no es capaz de regenerar la vitamina E en este tipo de sistemas.","PeriodicalId":309054,"journal":{"name":"Boletin De La Sociedad Chilena De Quimica","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126702716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 19
INVESTIGACION BASICA y APLICADA EN AZAMACROCICLOS SINTETICOS 合成氮杂环的基础与应用研究
Boletin De La Sociedad Chilena De Quimica Pub Date : 2002-06-01 DOI: 10.4067/S0366-16442002000200001
J. Costamagna
{"title":"INVESTIGACION BASICA y APLICADA EN AZAMACROCICLOS SINTETICOS","authors":"J. Costamagna","doi":"10.4067/S0366-16442002000200001","DOIUrl":"https://doi.org/10.4067/S0366-16442002000200001","url":null,"abstract":"","PeriodicalId":309054,"journal":{"name":"Boletin De La Sociedad Chilena De Quimica","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124936703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
ANTIFUNGAL AND ANTIBACTERIAL ACTIVITY OF DITERPENES ISOLATED FROM WOOD EXTRACTABLES OF CHILEAN PODOCARPACEAE 智利足樟科木材提取物中二萜的抑菌活性研究
Boletin De La Sociedad Chilena De Quimica Pub Date : 2002-06-01 DOI: 10.4067/S0366-16442002000200011
J. Becerra, C. Flores, J. Mena, P. Aqueveque, J. Alarcón, M. Bittner, V. Hernández, M. Hoeneisen, E. Ruiz, Mario Silva
{"title":"ANTIFUNGAL AND ANTIBACTERIAL ACTIVITY OF DITERPENES ISOLATED FROM WOOD EXTRACTABLES OF CHILEAN PODOCARPACEAE","authors":"J. Becerra, C. Flores, J. Mena, P. Aqueveque, J. Alarcón, M. Bittner, V. Hernández, M. Hoeneisen, E. Ruiz, Mario Silva","doi":"10.4067/S0366-16442002000200011","DOIUrl":"https://doi.org/10.4067/S0366-16442002000200011","url":null,"abstract":"Diez diterpenos, ferruginol (1a), hinokiol (1b), hinokione (1c), totarol (2a), totarodiol (2b), totarolone (2c), abietatriene (3), 6,7-dehydroferruginol (4), isopimarol (5) and acetylferruginol (6), fueron aislados desde la madera y corteza de cuatro especies de la familia Podocarpaceae. La estructura de estos compuestos fue determinada mediante metodos espectroscopicos. Se determino la actividad antimicrobiana de siete de estos compuestos frente a las bacterias: Bacillus brevis, B. subtilis, Escherichia coli, Micrococcus luteus, Providencia sp., Pseudomonas sp., Shigella sp., Staphylococcus aureus, Enterococcus faecalis, Streptococcus pyogenes y sobre los hongos Aspergillus sp., Fusarium fujikuroi, F. ciliatum, Mucor miehei, Nematospora coryli, Paecilomyces variotii and Penicillium notatum. Seis de estos diterpenos exhibieron actividad antibacteriana y cinco antifungica","PeriodicalId":309054,"journal":{"name":"Boletin De La Sociedad Chilena De Quimica","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132606104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 43
CRYSTAL AND MOLECULAR STRUCTURE OF 5-NITROPIRIDINE PIPERIDINE-SULFENAMIDE 5-硝基吡啶-哌啶-亚砜酰胺的晶体和分子结构
Boletin De La Sociedad Chilena De Quimica Pub Date : 2002-06-01 DOI: 10.4067/S0366-16442002000200012
I. Brito, Yasna León, M. Arias, D. Vargas, F. Carmona, Eduardo Ramirez, A. Restovic, A. Cárdenas, O. Wittke, M. López-Rodríguez
{"title":"CRYSTAL AND MOLECULAR STRUCTURE OF 5-NITROPIRIDINE PIPERIDINE-SULFENAMIDE","authors":"I. Brito, Yasna León, M. Arias, D. Vargas, F. Carmona, Eduardo Ramirez, A. Restovic, A. Cárdenas, O. Wittke, M. López-Rodríguez","doi":"10.4067/S0366-16442002000200012","DOIUrl":"https://doi.org/10.4067/S0366-16442002000200012","url":null,"abstract":"Se describe la estructura cristalina y molecular de 5-nitropiridina piperidina-sulfenamida C10H13N3O2 S y se compara con otras sulfenamidas y con otros compuestos similares. Esta estructura pertenece a un tipo de compuestos de azufre divalente y cristaliza en el sistema ortorrombico, grupo espacial Pnma con a= 27.810(4), b=6.797(1), c=6.110(1)A, y Dx =1.376 g cm-3 con Z=4. La distancia de enlace S-N de 1.699(4) A es mas corta que un enlace simple S-N [1.74 A]. La molecula NO2-(C6H3N)-S-N(C 5H10) queda en un plano de espejo cristalografico","PeriodicalId":309054,"journal":{"name":"Boletin De La Sociedad Chilena De Quimica","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126663248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
MONOTERPENES AND SESQUITERPENES IN THE HEADSPACE VOLATILES FROM INTACT PLANTS OF PSEUDOGNAPHALIUM VIRA VIRA, P. HETEROTRICHIUM, P. CHEIRANTHIFOLIUM AND P. ROBUSTUM: THEIR INSECT REPELLENT FUNCTION 假葡萄树、异毛蓟、白杨和鲁棒藤完整植株顶空挥发物中单萜类和倍半萜类的驱虫作用
Boletin De La Sociedad Chilena De Quimica Pub Date : 2002-06-01 DOI: 10.4067/S0366-16442002000200005
A. Urzúa
{"title":"MONOTERPENES AND SESQUITERPENES IN THE HEADSPACE VOLATILES FROM INTACT PLANTS OF PSEUDOGNAPHALIUM VIRA VIRA, P. HETEROTRICHIUM, P. CHEIRANTHIFOLIUM AND P. ROBUSTUM: THEIR INSECT REPELLENT FUNCTION","authors":"A. Urzúa","doi":"10.4067/S0366-16442002000200005","DOIUrl":"https://doi.org/10.4067/S0366-16442002000200005","url":null,"abstract":"Treinta y siete monoterpenos y sesquiterpenos han sido identificados en la mezcla de volatiles del \"headspace\" de cuatro especies de Pseudognaphalium. Uno de los compuestos mayoritarios que se identifico fue a-(z)-ocimeno [1], 87.0% en P. vira vira, 45.0% en P. heterotrichium, 41.0% en P. cheiranthifolium y 76.0% en P. robustum. Otros compuestos mayoritarios fueron germacreno D [2] (6.4%) en P. vira vira, b-felandreno [3] (45.4 y 27.4%) en P. heterotrichium y P. cheiranthifolium, germacreno B [4] (17.9%) en P. cheiranthifolium y (E)-3,7,11-trimetil-1, 6, 10-dodecatrieno-3-ol [5] (9.5%) en P. robustum. Se discute el papel de la mezcla de volatiles como repelente de insectos","PeriodicalId":309054,"journal":{"name":"Boletin De La Sociedad Chilena De Quimica","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126145896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
BASIC AND APPLIED SCIENCE OF SYNTHETIC AZAMACROCYCLES 合成氮杂环的基础与应用科学
Boletin De La Sociedad Chilena De Quimica Pub Date : 2002-06-01 DOI: 10.4067/S0366-16442002000200002
J. Costamagna
{"title":"BASIC AND APPLIED SCIENCE OF SYNTHETIC AZAMACROCYCLES","authors":"J. Costamagna","doi":"10.4067/S0366-16442002000200002","DOIUrl":"https://doi.org/10.4067/S0366-16442002000200002","url":null,"abstract":"","PeriodicalId":309054,"journal":{"name":"Boletin De La Sociedad Chilena De Quimica","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133151323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
ANÁLISIS DE LA FRACCCIÓN LIPÍDICA DE LA YEMA DE HUEVOS POR AMD-HPTLC 用AMD-HPTLC分析蛋黄脂质分数
Boletin De La Sociedad Chilena De Quimica Pub Date : 2002-03-01 DOI: 10.4067/S0366-16442002000100011
Carolina E. Figueroa, Mario Vega, Roberto Saelzer, G. Rios, H. Rodríguez
{"title":"ANÁLISIS DE LA FRACCCIÓN LIPÍDICA DE LA YEMA DE HUEVOS POR AMD-HPTLC","authors":"Carolina E. Figueroa, Mario Vega, Roberto Saelzer, G. Rios, H. Rodríguez","doi":"10.4067/S0366-16442002000100011","DOIUrl":"https://doi.org/10.4067/S0366-16442002000100011","url":null,"abstract":"Se desarrollo y valido un metodo por cromatografia planar instrumental (HPTLC) empleando una camara de desarrollo multiple automatico (AMD), para la determinacion de colesterol libre en yema de huevos con bajo contenido de colesterol. Se establecio el gradiente que permitio la separacion, identificacion y cuantificacion simultanea de colesterol, fosfatidilcolina y trioleina. Se evaluo el porcentaje de recuperacion a traves de un procedimiento de adicion estandar de colesterol con un rendimiento de 99,4%. La Repetibilidad y Repetibilidad intermedia resultaron adecuadas sobre la base del analisis de diferencia de medias a un nivel del 95% de confianza.","PeriodicalId":309054,"journal":{"name":"Boletin De La Sociedad Chilena De Quimica","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134435123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
SINTESIS ESTEREOSELECTIVA DE DODECAMINO-my - HEXOLTETRACOBALTO(III) EN PRESENCIA DE HIDRATOS DE CARBONO
Boletin De La Sociedad Chilena De Quimica Pub Date : 2002-03-01 DOI: 10.4067/S0366-16442002000100013
Guillermo Larrazábal, Sergio Bunel, C. Ibarra, J. Parada
{"title":"SINTESIS ESTEREOSELECTIVA DE DODECAMINO-my - HEXOLTETRACOBALTO(III) EN PRESENCIA DE HIDRATOS DE CARBONO","authors":"Guillermo Larrazábal, Sergio Bunel, C. Ibarra, J. Parada","doi":"10.4067/S0366-16442002000100013","DOIUrl":"https://doi.org/10.4067/S0366-16442002000100013","url":null,"abstract":"La reaccion entre el ion cis-[Co(NH3)4(H2O)2]3+ y amoniaco en presencia de un hidrato de carbono, conduce a la formacion del complejo tetranuclear de Cobalto (III): [Co4(NH3)12(OH)6]6+ (hexol), parcialmente resuelto en una proporcion que depende de la naturaleza del hidrato de carbono empleado","PeriodicalId":309054,"journal":{"name":"Boletin De La Sociedad Chilena De Quimica","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121516089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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