Thiopeptides, including micrococcins, are a growing family of bioactive natural products that are ribosomally synthesized and heavily modified. Here we use a refactored, modular in vivo system containing the micrococcin P1 (MP1) biosynthetic genes (TclIJKLMNPS) from Macrococcus caseolyticus str 115 in a genetically tractable Bacillus subtilis strain to parse the processing steps of this pathway...

Abstract In this study, the production of indoor humidity-buffering coatings (IHC-s) from recycling waste silica sludges by using a room-temperature sol-gel method which is simple and energy-efficient route reported. The properties these IHC-s are identified scanning electron microscope, X-ray diffraction, fluorescence spectrometer, laser particle size analyzer, N 2 adsorption-desorption isothe...

Stabilization was applied as a remediation option for immobilizing lead (Pb) in contaminated mine soil. Four types of waste materials were used stabilizing agents, namely oyster shells (WOS), calcined (COS), natural starfish (NSF), and spent-coffee-grounds-derived biochar (SCGB). The Pb-contaminated soil treated with the agents ranging from 0 to 10 wt% curing period 28 days. toxicity characteri...

In this paper, a series of equilibrium and kinetic experiments Hg(II) removal in single-stage batch reactor on natural (NZ) sulfur-impregnated zeolite (SZ) were performed. Batch sorption zeolites was studied using different isothermal models. It found to be best described by the Brouers-Sotolongo isotherm Vermeulen’s approximation, which applied optimizing mass contact time two-stage cross-curr...

Two polymeric resins, Polymal and Hetron, were evaluated to solidify/stabilize (S/S) for ultimate disposal brake lining dust containing asbestos. This dust was generated as part of a sequence of processing steps in the manufacture of automobile brake linings. The mean grain size of the lining dust for disposal was 298.2 m m, the range being from 24.9 to 567.3 m m. Based on the Toxicity Characte...

A method in combination of acid leaching, chemical exchange and ferrite process was applied to recycle copper and confer higher chemical stability to the sludge generated from etching process in printed circuit board industry. Ninety-five percent copper could be recycled in the form of powder from the sludge. Moreover, not only the wastewater after chemical exchange can be treated to fulfill th...

Purpose. Attapulgite was modified by sodium dihydrogen phosphate, oxalic acid-activated phosphate rock powder, potassium calcium superphosphate, ammonium and fused calcium-magnesium used in the remediation of Cd, Zn, Ni. Materials Methods. six kinds (ratio: 1 : 2), improvement effect passivation material on soil polluted cadmium, zinc, nickel determined. CaCl2-extractable toxicity characteristi...

The present paper discusses sintered glass–ceramics with attractive appearance, which are obtained by vitrification of hazardous industrial wastes. The chemical durability of parent wastes and resulting glasses was characterised by toxic characteristics leaching procedure (TCLP). The crystallisation behaviour was evaluated by DTA and XRD, while the structure of materials was observed by optical...