The paper presents results for the speciation analysis of lead in dusts derived from dedusting of technological gasses from metallurgical processes of non-ferrous metals with different elementary content, made in accordance with two equal sequential extractions. Analytical procedure A provided possibilities for determination of fraction of Pb(2+), metallic lead and fraction containing mainly le...

Long-term irrigation with untreated wastewater can lead to an accumulation of antibiotic substances and antibiotic resistance genes in soil. However, little is known so far about effects of wastewater, applied for decades, on the abundance of IncP-1 plasmids and class 1 integrons which may contribute to the accumulation and spread of resistance genes in the environment, and their correlation wi...

background: antifungal drug resistance and few numbers of available drugs limit therapeutic options against fungal infections. the present study was designed to discover new antifungal drugs.   m aterials and methods: this study was carried out in two separate steps, that is, in silico lead identification and in vitro assaying of antifungal potential. a structural data file of a ternary complex...

After identification and validation of targets in a drug development process, some independent lead compounds should be selected and optimized for their activities. Then, safety assessments and clinical trials decide whether the drug is proper to enter the market. Different stages of this process (and especially the identification of lead compounds) are extremely expensive and time-consuming. R...

A novel, convenient and efficient multi-component reaction for synthesis of phosphonate derivatives from activated acetylenic compounds with 2-hydroxyacetophenone in the presence of phosphites in water lead to the formation of phosphonates in good yields.

A convenient and efficient three-component reaction to a one-pot synthesis of thiophene derivatives from activated acetylenic compounds and ethyl 2chloroacetoacetate in the presence of tetramethyl thiourea in water lead to the formation of thiophenes in good yields.

The toxicity of tetra and trimethyl and propyl lead compounds has been studied after their administration to rats and rabbits. The toxicity to rats of tetramethyl lead has been compared with tetraethyl lead when given by inhalation. Both tetramethyl and tetrapropyl lead were found to be considerably less toxic than trimethyl and tripropyl lead. There was evidence of a slow rate of conversion of...