نتایج جستجو برای: calcification skeleton
تعداد نتایج: 39944 فیلتر نتایج به سال:
hepatic calcification is usually associated with infectious, vascular, or neoplastic processes in the liver. we report the first case of beta-thalassemia major with isolated diffuse hepatic calcification in a 23 year old woman, who had been transfusion-dependent since the age of 6 months. she was referred to our center with a chief complaint of abdominal pain. computed tomography scan of the ab...
Evaluation of Vitamin D Level and its Correlation to Vascular Calcification in Hemodialysis Patients
Introduction: Compared with the general population, hemodialysis patients are at increased risk of vascular calcification, which in turn is associated with an increased risk of mortality. Regarding the role of vitamin D in bone formation, regulation of calcium, phosphate and iPTH level and correlation of these variables in survival, this study was performed to evaluate the vitamin D serum level...
Fossils are essential to the reconstruction of the evolution of life and episodes in Earth history. Fossil skeletal material serves as the repository of chemical data widely used in the reconstruction of the Earth’s climate–ocean system at various time scales. Knowledge of biomineralization – the processes associated with the formation of mineralized biological structures – is essential to prop...
Hepatic calcification is usually associated with infectious, vascular, or neoplastic processes in the liver. We report the first case of beta-thalassemia major with isolated diffuse hepatic calcification in a 23 year old woman, who had been transfusion-dependent since the age of 6 months. She was referred to our center with a chief complaint of abdominal pain. Computed tomography scan of the ab...
Shell microstructures in some of the oldest known mollusk fossils (from the early to middle Cambrian Period; 542 to 510 million years ago) are diverse, strong, and in some cases unusual. We herein review our recent work focused on different aspects of shell microstructures in Cambrian mollusks, briefly summarizing some of the major conclusions from a few of our recent publications and adding so...
Nacre, the iridescent material found in pearls and shells of molluscs, is formed through an extraordinary process of matrix-assisted biomineralization. Despite recent advances, many aspects of the biomineralization process and its evolutionary origin remain unknown. The pearl oyster Pinctada fucata martensii is a well-known master of biomineralization, but the molecular mechanisms that underlie...
Abstract Ocean acidification alters the dissolved inorganic carbon chemistry of seawater and can reduce calcification rates tropical corals. Here we explore effect altering pCO 2 on skeletal morphology 4 genotypes massive Porites spp. which display widely different rates. Increasing causes significant changes in all studied regardless whether or not was significantly affected by . Both median c...
abstract- the adverse effects of periodontal disease on dental pulp has been debated for many years. this case- control study was performed to assess the possible effects of advanced periodontal disease on the structure of dental pulp. fifty-two permanent teeth extracted because of advanced periodontitis with 5mm attachment loss and grade iii mobility were compared to fifty-two control teeth,...
Ongoing ocean acidification is widely reported to reduce the ability of calcifying marine organisms to produce their shells and skeletons. Whereas increased dissolution due to acidification is a largely inorganic process, strong organismal control over biomineralization influences calcification and hence complicates predicting the response of marine calcifyers. Here we show that calcification i...
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