منابع مشابه
Sistema de Suscripción basado en XML para noticias digitales
Resumen. En este trabajo se plantea la problemática del seguimiento de un gran flujo de información entrante en una base documental, y la notificación de las novedades significativas a los usuarios de acuerdo a los perfiles definidos en sus suscripciones. Se propone un sistema de suscripción que utiliza un nuevo lenguaje basado en XML, que permite especificar consultas considerando la estructur...
متن کاملN-Substituted derivatives of 23-amino-4',23-dideoxymycaminosyl tylonolide. Synthesis and antibacterial activity.
23-Amino-4',23-dideoxymycaminosyl tylonolide diethyl acetal (5) has been prepared from 4',23-dideoxy-23-iodomycaminosyl tylonolide diethyl acetal (3) by treatment with sodium azide followed by selective reduction of the resulting azide (4). 23-Acylamino-23-deoxy (6 approximately 8) and 23-deoxy-23-urethane-type compounds (12 approximately 15) were further prepared. Treatment of the 23-alkylamin...
متن کامل[μ-10,21-Dimethyl-3,6,14,17-tetraazatricyclo[17.3.1.18,12]tetracosa-1(23),8(24),9,11,19,21-hexaene-23,24-diolato-κ8 N 3,N 6,O 23,O 24:N 14,N 17,O 23,O 24]bis[(nitrato-κ2 O,O′)nickel(II)]
In the title centrosymmetric dinuclear nickel complex, [Ni(2)(C(22)H(30)N(4)O(2))(NO(3))(2)], each of the two Ni(II) atoms has a distorted octa-hedral geometry, defined by two N atoms and two O atoms from the macrocyclic ligand and two O atoms from a chelating nitrate anion. The two Ni atoms are bridged by two phenolate O atoms, forming a four-membered Ni(2)O(2) ring.
متن کاملSyntheses of 23-C-alkylidene, and 23-N-containing derivatives of 5-O-mycaminosyltylonolide.
Several derivatives of 5-O-mycaminosyltylonolide substituted at C-23 have been prepared; these are 23-deoxy-23-C-methylene (3), 23-deoxy-23-C-(methoxycarbonylmethylene) (5), 23-deoxy-23-C-(ethoxycarbonylmethylene) (7), and 23-deoxy-23-C-(butoxycarbonylmethylene) (9), 23-deoxy-23-C-[(2E)-3-(ethoxycarbonyl)-2-propenylene] (11), and 23-deoxy-23-(dimethylaminoimino) (13), and 14-de(hydroxymethyl)-1...
متن کامل[μ-10,21-Dimethyl-3,6,14,17-tetrazatricyclo[17.3.1.18,12]tetracosa-1(23),2,6,8,10,12 (24),13,17,19,21-decaene-23,24-diolato-κ4 N 3,N 6,O 23,O 24:κ4 N 14,N 17,O 23,O 24]bis(perchlorato-κO)dimanganese(II)
In the centrosymmetric and dinuclear title complex, [Mn(2)(C(22)H(22)N(4)O(2))(ClO(4))(2)], the two Mn atoms are bridged by two phenolate O atoms of the N(4)O(2) macrocycle with an Mn⋯Mn distance of 2.9228 (11) Å. The distorted square-pyramidal N(2)O(3) coordination geometry is completed by an O atom derived from a perchlorate anion.
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ژورنال
عنوان ژورنال: De Computis - Revista Española de Historia de la Contabilidad
سال: 2015
ISSN: 1886-1881
DOI: 10.26784/issn.1886-1881.v12i22.33