in this study the effect of nano meter size zro2 particles on the microstructure, densification and hydration resistance of magnesite –dolomite refractories was investigated. 0, 2, 4, 6 and 8 wt. % zro2 particles that were added to magnesite –dolomite refractories containing 35 wt. % cao. the hydration resistance was measured by change in the weight of specimens after 72 h at 25℃ and 95% relati...

the major hydraulic phase in all the calcium aluminate cements including ciment fondue is ca (caal2o4). once hydrated, it starts to form the hexagonal crystals of cah10 and c2ah8 that depending on the time and temperature of hydration convert to the cubic crystals of c3ah6 and ah3. the nature, sequence, crystallinity and microstructure of hydrated phases of commercial refractory calcium alumina...

infection is the primary source of mortality in burn patients. one of the main treatment methods of burn wound infections is topical antimicrobial therapy, in which drugs have to permeate a dead tissue called eschar. unfortunately, most antimicrobial agents can not permeate eschar in therapeutic levels. surprisingly, permeation properties of this barrier and effects of chemical or environmental...

Several skin conditions have been reported to occur on epidermal nevi, but it seems that co-occurrence of a vascular lesion and an epidermal nevus is a very rare phenomenon. Herein, a 17- year- old female patient who had presented with skin lesions on her thigh since 4 years ago has been reported. The lesions were two oval plaques consisted of multiple brown- tinted, hyperkereratotic papu...

epidermal nevus syndrome is a rare congenital disorder, characterized by epidermal nevi and multiple organ involvement. multicystic kidney disease has been very rarely reported in this syndrome. here is the report of a boy presented with multiple epidermal nevi, cardiac anomaly, seizure attack, hemi hypertrophy, and multicystic dysplastic kidney complicated with wilms' tumor. according to this ...

Two experiments were conducted to evaluate the relationships between nutrients degradability, kinetics of hydration, functional specific gravity (FSG) of the three types of beet pulp (BP) including fine (FBP), normal (NBP) and pelleted (PBP) BP. In experiment 1, about 3 g of samples was weighed in sealed nylon bags (6 cm×7.5 cm, 40±5 µm pore size), incubated in rumen of two cannulated Holstein ...

physiologists have shown that increased fluids improve skeletal muscle performance in prolonged exercise.typical orders provide for 125 ml of intravenous fluids per hour in patients taking limited oral fluids during labor. our purpose in this study was to determine whether increased intravenous fluids affect the progress of labor. in a prospective randomized institutional clinical trial, one-hu...

The epidermis protects human subjects from exogenous stressors and helps to maintain internal fluid and electrolyte homeostasis. Filaggrin is a crucial epidermal protein that is important for the formation of the corneocyte, as well as the generation of its intracellular metabolites, which contribute to stratum corneum hydration and pH. The levels of filaggrin and its degradation products are i...

Controlled-rate freezing (CRF) of biopolymer scaffolds may increase reproducibility of microstructure compared with analog processes. Freezing of collagen-glycosaminoglycan (CG) scaffolds by CRF with liquid nitrogen at chamber cooling rates of -80, -40, -20, or -10°C/min, was compared with submersion in 95% ethanol at -55°C. Cooling rates of -80 or -40°C/min generated scaffolds with pore areas ...

Cutaneous irritation presents a major health problem with serious social and occupational impact. The interaction between an irritant and the human skin depends on multiple factors: the intrinsic properties and the nature of the irritant itself, and specific individual- and environment-related variables. The main pathological mechanisms of irritancy include skin barrier disruption, induction of...