N. 23 - APRESENTAÇÃO
نویسندگان
چکیده
Completa-se, com este número, um ciclo de publicação textos, fundamentalmente, no campo das Ciências Exatas, consolidando, assim, duas edições, neste ano 2000. Oito matérias – sete artigos e uma resenha que se referem à realidade circunscrita a regiões do Estado da Bahia ou questões mais amplas conhecimento humano. Idéias desenvolvidas exteriorizadas, teor singularidade universalidade, garantidas por seus autores, não somente professores desta universidade como os colaboradores instituições afins. Ações voltadas para distintas realidades, menor maior abrangência, mas vinculam num UNIVERSO tudo engloba. Vinculações desse naipe vêm enriquecendo linha editorial deste periódico, ora em nova fase, conforme Proposta Sitientibus 2000, elaborada editor.
منابع مشابه
Nevus sebáceo cerebriforme: uma rara apresentação*
A 13-year-old boy presented congenital, raised, yellowish colored plaques with fi broelastic consistency, which were velvety in appearance, alopecic, with clearly defi ned limits and sulci or well-marked meandering invaginations, a cerebriform appearance on the upper part of the right ear, accompanied by alopecia in the temporomandibular region-parietal. The lesion was asymptomatic. Histopathol...
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: Sitientibus
سال: 2022
ISSN: ['2675-3286', '1984-5812']
DOI: https://doi.org/10.13102/sitientibus.vi23.8777