introduction: the growth of agricultural production and natural resources are from primary objectives of any political system, because this section has a vital role in providing food security. according to the production theories, production growth will come from two sources; more use of production factors within the framework of existing technologies and second, with using more advanced and mo...

1.1 The last 20 years have seen wide-ranging research, both theoretical and empirical, on the determinants of long term growth. “Old growth models” of closed economies have given way to “new growth models” of open economies in concert with “new trade” theories. Facilitated by the availability of data that compare income levels across countries in real terms, econometricians have been able to st...

Growth rate and concentrations of sulfates, sulfides, proteins and glucosamine were analyzed during long-term (over 60 days) incubation of Desulfotomaculum acetoxidans DSM 771. To imitate natural conditions, incubation was done in obligate anaerobic conditions in three series, without stirring or shaking. In the first 2–3 days of incubation (lag phase), only a decrease of the sulfate level occu...

Some critics of invasion biology have argued the ecosystems by nonindigenous species can create more valuable ecosystems. They consider invaded communities as because they potentially produce ecosystem services. To establish that introduction creates ecosystems, defend value is provisioned These services are derived from productivity, production and cycling resources. Ecosystem productivity a r...

background: it has been documented that cytokines play important roles in the induction of normal functions of the placenta. it has been hypothesized that abnormal expression of the cytokines may be associated with unsuccessful pregnancy. objective: the aim of this study was to compare the serum levels of interleukin-17a (il-17a) and tumor growth factor (tgf-ß) in pre-term, term neonates, and t...