Results 21 to 30 of about 129,048 (168)

Solitons in Ideal Optical Fibers - A Numerical Development

open access: yes, 2010
This work developed a numerical procedure for a system of partial differential equations (PDEs) describing the propagation of solitons in ideal optical fibers.
Cirilo, Eliandro Rodrigues   +4 more
core   +1 more source

Systematic study of the employment of enzymatic catalysts on the formation of carbon-heteroatoms

open access: yesOrbital: The Electronic Journal of Chemistry, 2012
The classic thio-Michael reaction is the one that involves the addition of a sulfur atom like the nucleophile of the reaction to an electrophile α,β -insaturated.
Paula Vanessa S. Rizzo   +6 more
doaj   +1 more source

An unusual titanosaur axis from the Upper Cretaceous of Brazil and its significance for sauropod anatomy and systematics

open access: yesThe Anatomical Record, EarlyView.
Abstract The Upper Cretaceous São José do Rio Preto Formation (Bauru Group, southeastern Brazil) has yielded a fragmentary but taxonomically diverse record of titanosaur sauropods, although elements from cervical series remain scarce. Here, we describe a nearly complete sauropod axis from the Vila Ventura Paleontological Area, representing an uncommon ...
Bruno A. Navarro   +7 more
wiley   +1 more source

The musculature and skeleton of the pelvic fin of the crocodile shark, Pseudocarcharias kamoharai (Matsubara, 1936) (Elasmobranchii: Lamniformes): Morphology and sexual dimorphism

open access: yesThe Anatomical Record, EarlyView.
This work brings new information on the sexual characteristics of the crocodile shark (Pseudocarcharias kamoharai) exploring the pelvic fin musculature, as well as the siphon sac and the musculature and skeleton of the clasper. Our paper is the first to point out clearly the sexual dimorphism related exclusively to the pelvic fin musculature in males ...
Laura F. Mianutti   +2 more
wiley   +1 more source

Indicadores preliminares para avaliação da restauração em reflorestamentos de ambientes ciliares

open access: yesPesquisa Florestal Brasileira, 2014
O sucesso da restauração em ecossistemas florestais pode ser avaliado pela seleção correta de indicadores que sejam representativos da consecução dos objetivos estabelecidos.
Daniele Nogueira dos Reis   +2 more
doaj   +1 more source

Stereochemical Modulation of Palladacyclopentadienyl Complexes Bearing Diphosphine Ligands: A Key to Enhanced DNA Interaction and Anticancer Activity

open access: yesEuropean Journal of Inorganic Chemistry, EarlyView.
A modular library of structurally robust palladacyclopentadienyl Pd(II) complexes bearing achiral and chiral diphosphines was developed, revealing a strong influence of diphosphine design and ligand chirality on cytotoxicity and selectivity against ovarian cancer cells, including platinum‐resistant models.
Stefania Mautone   +7 more
wiley   +1 more source

Synthesis of Novel C‐Acyl‐Glycosyl Sulfonamides via Pd‐Catalyzed Carbonylative Coupling

open access: yesEuropean Journal of Organic Chemistry, EarlyView.
A Pd‐catalyzed carbonylative coupling of 1‐iodo‐glycals with diverse sulfonamides using Mo(CO)6 enables efficient access to C‐acyl‐glycosyl sulfonamides.This robust and versatile strategy delivers novel glycoside derivatives in good to excellent yields, highlighting their potential for drug discovery.
João A. F. Silva   +5 more
wiley   +1 more source

Novelty for the flora of Espírito Santo, Brazil: a new species of Ouratea Aubl. (Ochnaceae)

open access: yesNordic Journal of Botany, EarlyView.
Here, we describe and illustrate the new species Ouratea oberdanii Fraga & Deccache, which is named after Dr Oberdan José Pereira. This new species is found in the mountainous regions of the evergreen Atlantic Forest in the Brazilian state of Espírito Santo. Ouratea oberdanii is similar to O. linearis (A.Gray) Sastre & Offroy and O.
Lara Serpa Jaegge Deccache   +4 more
wiley   +1 more source

Certeza e Incerteza

open access: yesMises, 2017
O presente texto expõe a concepção misesiana sobre as diferenças entre os métodos das ciências naturais e as ciências da ação humana, ou praxiologia.
Ludwig von Mises
doaj   +1 more source

PERFIL DOS ALUNOS RETIDOS DOS CURSOS DE GRADUAÇÃO PRESENCIAL DA UNIVERSIDADE FEDERAL DO ESPÍRITO SANTO [PDF]

open access: yes, 2014
RESUMO O objetivo desta pesquisa foi descrever o perfil dos estudantes retidos dos cursos de graduação presenciais da Universidade Federal do Espírito Santo.
Brasil, Gutemberg Hespanha   +3 more
core  

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