This paper reports a plenary thermodynamic model of a novel solar system for water heating in buildings. Energy and exergy analyses are used to characterize the exergy destruction rate in any component and calculate system overall efficiency. The system consists of a solar evaporator, a heat exchanger to produce hot water, and an auxiliary pump. A computer simulation program using EES software ...

the synthesis of 3-amino-1-nitroguanidine (3-anq) and 5-hydrazino tetrazole (5-ht) derivatives as new energetic materials are described. reaction of 3-anq with triethyl orthoformate leads to the formation of 3-nitramino triazole while no reaction was observed whit 5-ht. addition of nan3 to a mixture of 3-anq and triethyl orthoformate, afforded 1-nitroguanidyl tetrazole in excellent yield. on th...

in order to reach the electronic health record's (ehr's) goals and also for the users to employ it with confidence, integrated standards in the field of structure, content, data exchange, information production, architecture and system security must be formulated. before establishment of ehr, we should accept current standards or change them due to meet the needs of society and/or patterns from...

objective(s):this study was designed to evaluate the cardioprotective effect of crocus sativus l. (saffron)aqueous extract and safranal, the major constituent of the essential oil of saffron, on lipid peroxidation, biochemical parameters and histopathological findings in isoproterenol (iso)-induced myocardial infarction in wistar rats. materials and methods:the saffron extract (20, 40, 80 and 1...

three groups of 11 new zealand white (nzw) rabbit does, each were reared from 12 weeks of age on iso-energetic diets containing 16, 14 or 12% crude protein (cp) were used to study influences on productive performance, digestibility, some carcass traits, haematological, biochemical and hormonal parameters of rabbit does. the results showed rabbits fed on 16% protein diet had heavier body weights...