sulfonic acid functionalized sba-15 as a nanoporous acid catalyst was used in the synthesis of 2-aryl benzoxazoles 4 by the condensation of 2-aminophenol 1 and benzoyl chlorides 2 under microwave irradiation in solvent free reaction conditions. the advantages of this methodology are good product yields (60-98%), being environmentally benign, short reaction times and easy work up.

osteonecrosis (on) is characterized through the impairment of osseous blood flow that leads to the collapse of femur head. corticoid-induced on in rats and lipopolysaccharide (lps)-induced in rabbits are useful models to assess the efficacy of potential treatments on this disease. d-003 inhibits the mevalonate pathway, lipid peroxidation and prevents osteoporosis in rats through increasing the ...

background :cytotoxic t lymphocyte-associated antigen-4 (ctla-4) is an important negative regulator of t-cell responses. the -1722tc polymorphism of the ctla-4 gene may be associated with systemic lupus erythematosus (sle) risk, but related results from previous studies have been inconsistent. we carried out a meta-analysis to assess this association more precisely.   methods : a systematic sea...

glucose-6-phosphate dehydrogenase is an essential enzyme to cell growth. its deficiency of enzyme plays an important role in senescence and death signaling. also, it is actually the most common clinically important enzyme defect, not only in hematology, but also among all human known diseases. clinical consequences of enzyme deficiency are: neonatal hyperbilirubinemia, acute hemolytic anemia, a...

in this paper, the adsorption of cerium on modified mesoporous aluminosilicate (with si/al mole ratio of 10) was studied. the effects of ph, contact time, initial concentration of cerium on adsorption of cerium were investigated. the adsorption capacity was high in the ph range of 4-8 and decreases with decreasing of the ph value. the langmuir and freundlich isotherms were applied to represent ...

objective(s):parkinson's disease (pd) is known for motor impairments. but often, there are non-motor symptoms such as cognitive deficiency and pain misperception, owing to possible role of nigrostriatal pathway. antioxidants have protective effect on free radical-induced neuronal damage in pd. to further address, we examined the effects of ellagic acid (ea) in a rat model of pd induced by ...