in this study, the effect of some toxic organic chemicals on mogan lake has been investigatedusing the aquatox model. the unique property of the model includes the sub ecotoxicological modelwhen compared to the other water quality models. the ecosystem model aquatox, which is one of the fewgeneral ecological risk models that represents the combined environmental repercussions and effects of tox...

during the past few years, there has been an increasing recognition that internet is playing a significant role in the synthesis, the distribution and the consumption of novel psychoactive substances (nps).the aim of this study was to assess the online availability of nps in persian language websites.the google search engine was used to carry out an accurate qualitative assessment of informatio...

The irradiation of milk is a complex problem from the physical, optical, and photochemical standpoint. The knowledge concerning the antirachitic activation of pure sterols with ultra-violet radiation cannot be applied directly to milk for several reasons. The provitamin or activatable substance as it exists in milk is associated with other materials in solution and suspension. Such substances m...

In this work, we extend the pure fluid crossover statistical associating fluid theory (HRX-SAFT) equation of state (EOS) (Kiselev et al., Fluid Phase Equilib. 2001, 183-184, 53) to fluid mixtures of polar and associating components. HRX-SAFT incorporates non-analytic scaling laws in the critical region and is transformed into the analytical, classical HR-SAFT EOS far away from the critical poin...

The industrial interest in petroleum compounds has generated large amounts of data for both pure components and mixtures of hydrocarbons. These data and the general similarity in molecular structure of the components have made it possible to develop reasonably precise methods for predicting thermodynamic properties of hydrocarbons over a wide range of conditions. When chemically dissimilar mixt...

The secretory response of gastric acid to pure ethanol and alcoholic beverages may be different because the action of the non-ethanolic contents of the beverage may overwhelm that of ethanol. Pure ethanol in low concentrations (< 5% vol/vol) is a mild stimulant of acid secretion whereas at higher concentrations it has either no effect or a mildly inhibitory one. Pure ethanol given by any route ...

We examined how 1 year students (10th grade) of Greek Senior High School could conceptualize the influence of the molecular weight of saturated fatty acids on the melting and the freezing point, during the ‘change of phase’ phenomenon using the Microcomputer-Based Laboratory (MBL) system. Students had to freeze a melted substance, observing at the same time the change of its temperature and try...

According to a conventional evolutionary perspective, the human propensity for substance use is the product of a 'mismatch' between emotional mechanisms that evolved in a past without pure drugs or direct routes of drug administration, and the occurrence of these phenomena in the contemporary environment. The primary purpose of this review is to assert that, contrary to the conventional view, h...