نتایج جستجو برای: animal migration

تعداد نتایج: 344391  

Journal: :iranian journal of pathology 2015
ameneh ghaffarinia cyrus jalili ali mostafaie shahram parvaneh nafiseh pakravan

background and objectives: multiple sclerosis is an inflammatory disease of the central nervous system. this is due to migration of peripherally activated lymphocytes to central nervous system leading to inflammatory lesions. however, liver has an anti-inflammatory microenvironment. myelin expression in the liver of transgenic mice suppresses inflammatory lesions within central nervous system. ...

Biogeography-Based Optimization (BBO) algorithm has recently been of great interest to researchers for simplicity of implementation, efficiency, and the low number of parameters. The BBO Algorithm in optimization problems is one of the new algorithms which have been developed based on the biogeography concept. This algorithm uses the idea of animal migration to find suitable habitats for solvin...

Journal: :avicenna journal of dental research 0
sara soheilifar department of periodontology, hamadan university of medical sciences, hamadan, ir iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی همدان (hamadan university of medical sciences) sepideh soheilifar department of orthodontics, shahid beheshti university of medical sciences, tehran, ir iran; sepideh soheilifar, department of orthodontics, shahid beheshti university of medical sciences, evin st., tehran, ir iran. tel: +98-9121944033سازمان اصلی تایید شده: دانشگاه علوم پزشکی شهید بهشتی (shahid beheshti university of medical sciences) mohsen bidgoli department of periodontology, hamadan university of medical sciences, hamadan, ir iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی همدان (hamadan university of medical sciences) parviz torkzaban department of periodontology, hamadan university of medical sciences, hamadan, ir iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی همدان (hamadan university of medical sciences)

context this article reviews the available evidence about the barrier membranes utilized in guided tissue regeneration process to prevent the migration of unfavorable cells to the wound area. evidence acquisition available evidence about membranes properties and their different uses were reviewed, and the results of clinical and animal studies and systematic reviews were gathered. results a lar...

Journal: :Science 2006
Thomas Alerstam

Because of conflicting evidence about several fundamental issues, long-distance animal navigation has yet to be satisfactorily explained. Among the unsolved problems are the nature of genetic spatial control of migration and the relationships between celestial and magnetic compass mechanisms and between different map-related cues in orientation and homing, respectively. In addition, navigation ...

2011
Danilo Russo

1. What is ecological zoogeography 2. Ecogeographical “rules” 2.1. Bergmann’s rule 2.2. Allen’s rule 2.3. Rapoport’s rule 3. Distribution of animals: patterns and causal factors 3.1. Species conceptualization and delimitation: their importance for zoogeography 3.2. Patterns of distribution 3.3. Endemisms and relicts 3.4. Abiotic ecological factors influencing species distribution 3.5. Biotic ec...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم 1386

چکیده ندارد.

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علوم کشاورزی و منابع طبیعی گرگان 1387

چکیده ندارد.

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