نتایج جستجو برای: zone of concealment
تعداد نتایج: 21173899 فیلتر نتایج به سال:
introduction: the aim of the present study was to determine direct effects of no modulation on protective electrophysiological properties of atrioventricular node (av node) in the experimental model of af in rabbit. methods: isolated perfused rabbit av nodal preparations were used in two groups. in the first group (n=7), lname (50μm) was applied. in the second group (n=12), different concentrat...
Introduction: Despite extensive studies about effects of Crataegus monogyna on cardiovascular diseases yet, a few study has been undertaken antiarrhythmic property of this plant. Aims of the present study were: 1) To determine the protective role of methanolic extract of C.monogyna on the rate-dependent model and the concealed conduction . 2) To explore the role of Na+-K+ A TPase in the protect...
abstract the balvard metamorphic assemblage (bma) crops out at the northeastern margin of the southeastern part of the sanandaj-sirjan zone (ssz) in contacting to the dehshir-baft ophiolitic mélange. this location prepared a special situation to resolve some of the complicated tectonic problems of this part of iran. petrology, micro-tectonics and satellite image investigation were carried out ...
abstract this study is an attempt to determine the effect of nano- technology education on science lesson for fifth grade in primary school in the city of kermanshah. this research is experimental and is conducted in the from of pre-test and post- test for the control group. an achievement test was administered to determine the rate of learning in the students. the research is an applied one. ...
in the second half of the 2nd/8th century, the ismā‘īlī sect, who believed in the imamate of ismā‘īl, the second son of imam ja‘far al-ṣādiq (a.s.), was formed. the ismā‘īlīs brought up specific views concerning imamate. from their point of view, the world of being can not survive a moment without the existence of an imam and that mankind is always in need of a teacher, leader, and infallible i...
Introduction: Addiction is a complex disease characterized by compulsive behaviors, irresistible temptations, drug behaviors, and persistent consumption, even when there are many negative consequences for the individual. Objective: The purpose of this study was to determine the role of self-concealment and alexithymia in predicting resistance to change of drug users. Material and Methods: This ...
this study attempts to investigate the effect of peers’ revision in comparison to that of the teacher, and whether peers’ comments and teachers’ comments facilitate students’ revision? if yes, which one is more effective? also attempts have been made to see which aspects of language are more highlighted by peers versus teachers when commenting. besides, it is investigating the student’s attitud...
Calcium channel blockers depress atrioventricular (AV) nodal properties in vivo in a frequency-dependent manner, suggesting that selective drug action during supraventricular arrhythmias may result from use-dependent properties. The present study was designed to examine whether or not the rate-dependent actions of diltiazem account for its therapeutic effects during atrial fibrillation. The det...
OBJECTIVES To compare how allocation concealment is described in publications of randomised clinical trials and corresponding protocols, and to estimate how often trial publications with unclear allocation concealment have adequate concealment according to the protocol. DESIGN Cohort study of 102 sets of trial protocols and corresponding publications. SETTING Protocols of randomised trials ...
Abstract Camouflage is a widespread strategy to increase survival. The cryptic plumage colouration of precocial chicks improves camouflage often through disruptive colouration. Here, we examine whether and how fringed neoptile feathers conceal the outline chicks. We first conducted digital experiment test two potential mechanisms for concealment appendages: (1) reduction edge intensity (2) lumi...
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