BACKGROUND & OBJECTIVES Antibiotic resistance in pathogens has become a serious problem worldwide. Therefore, the search for new antibiotics for drug resistanct pathogens is an important endeavor. The present study deals with the production of anti-methicillin resistant Staphylococcus aureus (MRSA) potential of Streptomyces rubrolavendulae ICN3 and evaluation of anti-MRSA compound in zebrafish ...

Objective: Moringa oleifera Lam. is the most widely cultivated species of the monogeneric family Moringaceae and has an impressive range of medicinal uses with high nutritional value. In this study saponin was isolated from Moringa oleifera pods. Methods: Thin layer chromatography (TLC) was performed using a mobile phase of Chloroform: methanol: H2O (7:3:1) on silica gel glass plates. High perf...

in this research, nanoporous silica (sba-15) was physically functionalized using2-(2-nitrobenzylideneamino) guanidine compound. this functionalized sba-15 was utilized as a new sorbentfor separation and preconcentration of some lanthanide ions. inductively coupled plasma optical emissionspectrometry (icp-oes) was used as a detection technique. the preconcentration factor of the method is 100and...

  Background: Satureja mutica (Lamiaceae) is an herbaceous plant which grows in North-West of Iran. Oleanolic acid has been previously isolated from some Lamiaceae genus and showed a broad range of biological activities. Besides Silphium spp., Panax quinquefolium root and Calendula officinalis flower as the interesting source of oleanolic acid used in the herbal industry, here we report the iso...

The desilication effects of aluminium sulphate and sodium aluminate on kraft bamboo pulp during the cooking process were investigated in this study. Furthermore, the residual aluminium ion concentration in the resulting black liquor was measured by inductively coupled plasma atomic emission spectrometry (ICP-AES) to evaluate the scaling properties of black liquor during the evaporation process....

During the course of the isolation of gregatin A (1) from submerged cultures of Aspergillus panamensis a new tetronic acid derivative was obtained. According to its cyclic structure this compound was named cyclogregatin (2). In the following the structural elucidation and the biological activities of 2 in comparison with gregatin A will be described. A. panamensis, CBS120.45, was cultivated as ...

Synthetic mesoporous alumina and silica minerals with uniform pore geometries, and their nonporous analogues, were used to test the role of mineral mesopores (2-50 nm diameter) in protecting organic matter from enzymatic degradation in soils and sediments. Dihydroxyphenylalanine (L-DOPA), a model humic compound, was irreversibly sorbed to both mineral types. The surface area-normalized adsorpti...

ABSTRAKKabupaten Padang Pariaman memiliki sumber daya pozzolan yang belum termanfaatkan secara optimal. Pozzolan adalah bahan mengandung senyawa silika dan alumina. Untuk pemanfaatan optimal dilakukan analisis karakterisasi potensi sebagai silika. Silika bisa dimanfaatkan untuk baku utama diberbagai industri, seperti industri gelas, keramik, katalis, pertanian pengolahan limbah. mengetahui kual...

Biogenic silica production occurs at mild conditions with greater control of pore size, shape, and micropatterning than is possible with typical industrial sol-gel methods, providing inspiration for potential alternative routes to silica synthesis. Researchers have implicated the amine moieties, histidine and polylysine, on proteins isolated from sponges and diatoms as catalysts for biogenic si...

We have come to divide bacteria and viruses into filterable and nonfilterable, and we have come to think that those organisms, visible or invisible, which are smaller than the pores of our filter are filterable. That size, however, cannot be the sole criterion we have known from the behavior of certain aniline dyes.* Thus Victoria blue, a basic dye, will not pass a Berkefeld filter while Congo ...