نتایج جستجو برای: protective structures

تعداد نتایج: 567344  

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2006
Virgil Percec Andrés E Dulcey Mihai Peterca Monica Ilies Sami Nummelin Monika J Sienkowska Paul A Heiney

The self-assembly of the dendritic dipeptides (4-3,4-3,5)nG2-CH2-Boc-L-Tyr-L-Ala-OMe and their achiral dendritic alcohol (4-3,4-3,5)nG2-CH2OH precursors, both with n = 1-16, where n represents the number of methylenic units in the alkyl groups of the dendron, are reported. All chiral dendritic dipeptides and achiral dendritic alcohols self-assemble into helical porous columns that are stable in...

F. Azarsina, P. . Atabak S. Allahyaribeik

This study aims to examine the performance of the rock materials in the protective layer of rubble-mound breakwaters in southern Iran, from Rostami Port in Bushehr Province to Beris Port in Sistan and Baluchestan Province. Field inspections were carried out on a great number of rubble-mound breakwaters built in the Persian Gulf and Oman Sea coastal regions to study the protective layer of these...

Background: Long-term use of levofloxacin can cause alterations in the liver function. This study aimed to determine the protective effect of black seed oil (BSO) against liver injury due to levofloxacin administration in rats. Methods: The chemical composition of BSO was analyzed with gas chromatography and mass spectrophotometry (GC-MS). Rats (n=30) were treated daily with levofloxacin and ...

Journal: :Journal of physics 2022

Abstract This work presents the results of simulation and optimization multiconductor modal filters (MFs) with circular cross section in range real geometric parameters. Five MF structures 2–4 conductors are considered a protective shield without it. Parametric was performed by amplitude time criteria order to obtain complete ultrashort pulse (USP) decomposition. As result, it achieved all maxi...

2014
Evelina Leivada Cedric Boeckx

The repeatedly noted absence of case-reports of individuals with schizophrenia and congenital/early developed blindness has led several authors to argue that the latter can confer protective effects against the former. In this work, we present a number of relevant case-reports from different syndromes that show comorbidity of congenital and early blindness with schizophrenia. On the basis of th...

2013
Michele Heath

Problems of adherence of thermal protective coatings to aerospace structures have become important with their use on vehicles such as the space shuttle and for jet engine turbine blades. In these structures a dielectric coating which acts as a thermal barrier. is bonded to a conductive substrate. Failure of these coatings to adhere to the substrate can result in catastrophic failure of the vehi...

Journal: :iranian journal of science and technology (sciences) 2008
a. shafiei deh abad

in this paper we introduce the concept of dirac structures on (hermitian) modules and vectorbundles and deduce some of their properties. among other things we prove that there is a one to onecorrespondence between the set of all dirac structures on a (hermitian) module and the group of allautomorphisms of the module. this correspondence enables us to represent dirac structures on (hermitian)mod...

Journal: :The British journal of ophthalmology 1991
R Smith

Abstract Background: Skin cancer is one of the most common cancers in the world and in the past decades its incidence has increased a lot. However, this type of cancer is largely preventable through protective behaviors. This study aimed to determine the most important predictors that effect on protective behaviors based on BAZNEF model in midwifery students in Urmia. Methods: This Descri...

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