نتایج جستجو برای: skeletal system
تعداد نتایج: 2315863 فیلتر نتایج به سال:
abstract purpose: skeletal staining is a way to study the effect of many chemical or herbal substances on development of bones and cartilages in order to record the level of probable deformity.this article aimed to present a modified protocol to make all skeletal studies on laboratory animals possible. materials and methods: the important notes about skeletal staining were fixing by ethanol and...
in this study, effects of buthus eupeus venom on chick biventer cervices nerve-muscle preparation were investigated by twitch tension method. the venom, at 1.3 ?g/ml, increased contractile responses in indirect stimulations. these effects were milder in direct muscle stimulations. it also caused significant enhancement in postjunctional sensitivity as assessed by responses to exogenous acetylch...
extra-skeletal ewing’s sarcoma is a rare soft tissue malignant neoplasm, morphologically indistinguishable from skeletal ewing’s sarcoma. the usual sites of involvement are the soft tissues of para-vertebral region, chest wall, and lower extremity. extra-skeletal ewing’s sarcoma is rare in the head and neck region and very few cases are reported in the parotid gland. the cytological features of...
The branchiomeric skeletal muscles co-evolved with new chambers of the heart to enable predatory feeding in chordates. These co-evolved tissues develop from a common population in anterior splanchnic mesoderm, referred to as cardiopharyngeal mesoderm (CPM). The regulation and development of CPM are poorly understood. We describe an embryonic stem cell-based system in which MESP1 drives a PDGFRA...
The nature, biological characteristics, and contribution to organ physiology of skeletal stem cells are not completely determined. Chan et al. and Worthley et al. demonstrate that a stem cell for skeletal tissues, and a system of more restricted, downstream progenitors, can be identified in mice and demonstrate its role in skeletal tissue maintenance and regeneration.
A model of the cell bioenergetic system was used to compare the effect of oxidative phosphorylation (OXPHOS) deficiencies in a broad range of moderate ATP demand in skeletal muscle and heart. Computer simulations revealed that kinetic properties of the system are similar in both cases despite the much higher mitochondria content and "basic" OXPHOS activity in heart than in skeletal muscle, beca...
a significant problem in multicarrier communication systems is the necessity to reduce the value of papr (peak-to-average power ratio) of transmitting signal. in this thesis we study the effect of the system parameters such as coding and modulation types on papr and ultimate ber in a mc-cdma system. in this study we consider fading channel as well as the nonlinearity of transmitter’s amplifier ...
The skeleton is of fundamental importance in research in comparative vertebrate morphology, paleontology, biomechanics, developmental biology, and systematics. Motivated by research questions that require computational access to and comparative reasoning across the diverse skeletal phenotypes of vertebrates, we developed a module of anatomical concepts for the skeletal system, the Vertebrate Sk...
Jarcho-Levin syndrome is a rare central skeletal system defect with the involvement of ribs and vertebrae and association of short trunk stature and some other organ anomalies. One of the common problems is different rate of respiratory abnormalities. Chest X-Ray is the primary base for the diagnosis, but spiral 3D CT scan give us more accurate evaluation of the ribs situation. There are also c...
The natriuretic peptide family consists of three endogenous ligands: atrial natriuretic peptide (ANP), brain natriuretic peptide (BNP), and C-type natriuretic peptide (CNP). They exert their biological actions through two subtypes of particulate guanylyl cyclase (GC): GC-A for ANP and BNP, and GC-B for CNP. Among the natriuretic peptide family members, ANP and BNP are cardiac hormones that are ...
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