Studies to evaluate more than 100 compounds as inhibitors of urease activity in soils showed that dihydric phenols and quinones were the most effective organic compounds tested and that silver and mercury salts were the most effective inorganic compounds. When the most potent inhibitors were compared using 50 1'8 of inhibitor per g of soil, their effectiveness decreased in the order: catechol >...

phenolic and flavonoid compounds are secondary metabolites of plants which possess various activities such as anti-inflammatory, analgesic, anti-diabetes and anticancer effects. it has been established that these compounds can scavenge free radicals produced in the body. because of this ability, not only the plants containing phenolic and flavonoid compounds but also, the pure compounds are use...

in recent years there has been considerable interest in the synthesis and separation of enantiomers of organic compounds especially because of their importance in the biochemistry and pharmaceutical industry. high-performance liquid chromatography is a very useful method for the direct separation of enantiomers. however, about 30−40 years ago, commercially available chiral stationary phases wer...

repellet effect of extracts and essential oils of citrus limon (l.) burm.f., (lemon) and melissa officinalis, (balm) were evaluated against anopheles stephensi in laboratory on animal and human and compared with synthetic repellent, n,ndiethyl- 3-methylbenzamide (deet) as a standard. results of statistical analysis revealed significant differences between oils and extracts (p< 0.05) against the...

Cancer stem cells (CSCs) are known as the major reason for therapy resistance. Recently, natural herbal compounds are suggested to have a significant role in inhibiting the breast cancer stem cells (BCSCs). The aim of this study was to explore the effective natural herbal compounds against BCSCs.This review article was designed based on the BCSCs, mechanisms of therapy resistance and natural he...

the six elements commonly known as metalloids are boron, silicon, germanium, arsenic, antimony, and tellurium. metalloid containing compounds have been used as antiprotozoal drugs. boron-based drugs, the benzoxaboroles have been exploited as potential treatments for neglected tropical diseases. arsenic has been used as a medicinal agent and arsphenamine was the main drug used to treat syphilis....

introduction: active packaging is one of the innovations in food packaging industry that would be a respons to the changing needs of consumers and markets. in this technique, materials such as adsorbents oxygen, moisture, carbon dioxide, ethylene and carbon dioxide-releasing flavor compounds, antimicrobials, antioxidants and various aromatic compounds are used. in the last decade, great attenti...