نتایج جستجو برای: animal morphology
تعداد نتایج: 349180 فیلتر نتایج به سال:
BACKGROUND: Stem cell therapy in small animal medicineis still in its infancy and few in vitro and in vivo research projectsregarding animal Mesenchymal Stem Cells (MSCs) have beencarried out. On the other hand, Cell tracking is the first step of thecell-based therapies and is essential to recognize cell fate posttransplantation. OBJECTIVES: The aim of this study was toisolate, characterize, an...
Regulatory DNAs serve as templates to bring weakly interacting transcription factors into close proximity so they can work synergistically to switch genes on and off in time and space. Most of these regulatory DNAs are enhancers that can work over long distances--a million base pairs or more in mammals--to control gene expression. Critical enhancers are sometimes even found within the introns o...
background: the persian squirrel (sciurus anomalus) is a member of the family sciuridae in the middle east and very little information is available about the anatomy of the different organs of this animal. objectives: in this study, histological and macro anatomical structures of penis were examined on 6 adult male persian squirrels. methods: each animal was sacrificed after anesthesia with ket...
The Hedgehog signaling pathway is part of the ancient developmental-evolutionary animal toolkit. Frequently co-opted to pattern new structures, the pathway is conserved among eumetazoans yet flexible and pleiotropic in its effects. The Hedgehog receptor, Patched, is transcriptionally activated by Hedgehog, providing essential negative feedback in all tissues. Our locus-wide dissections of the c...
Skin lesions were found in two 3–4-year-old Holstein cows in a dairy farm in Shiraz. Lesions were distributed mostly around the neck, forelimbs, hindlimbs, and bilateral of midline portion and varied from nodule-like structure to patch with extensive accumulation of crust. Skin scraping samples were taken from each animal and direct smears were prepared, stained with Giemsa and observed under a...
The divergent genital morphology observed among closely related animal species has long been posited as a mechanism of reproductive isolation. Despite the intuitive appeal that rapidly evolving genitalia might cause speciation, evidence for its importance-or even its potential-in reproductive isolation is mixed. Most tests of genital structural isolation between species often fail to find convi...
Biomimetic tessellation is the combination of biomimetic and principles. This paper conducted an in-depth study on those theory. First, author introduced pangolin scales aggregates fruit, a target their animal plant morphology by using principle. Second, according to advantages obtained, chooses suitable building case makes innovate application two principle test its rationality. The conclusion...
Motion-induced sound is an intrinsic byproduct of essentially all animal behavior. Locomotion-induced sounds that have evolved specialization for communication are termed sonations. The null hypothesis is that locomotion-induced sounds are noncommunicative (adventitious), produced by nonspecialized morphology, and are involuntary. A sound is a sonation if it is produced by specialized morpholog...
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