The addition of a small amount of NH4+ to a complex medium increased nanaomycin production by Streptomyces rosa subsp. notoensis OS-3966. The best NH4+ donor for nanaomycin production was NH4+-saturated natural zeolite, with which the maximum titer of nanaomycin E was 760 micrograms/ml, about four fold higher than the control titer. In contrast, lowering NH4+ levels by adding NH4+-trapping agen...

the effects of different concentrations of cdcl2 and alcl3 on nh4+ and no2? oxidation in an aqueous system were investigated. alcl3 had no effect on nh4+ removal and its oxidation to no2?, whereas no2? disappearance was greatly enhanced by alcl3. in contrast, cdcl2 delayed removal of nh4+ and its subsequent oxidation to no2? and also decreased the rate of no2? disappearance. when compared to th...

A particular river-whiting phenomenon occurred in the early 2000s in the Xiaoche River and since then it has been reoccurring from June to November each year. Residents were surprised by this phenomenon and worried about it. This study was designed to reveal the forming mechanism of the river-whiting phenomenon. A comparison of T, EC, ORP, DO, TDS and δ34S in the culvert water and discharge pip...

BACKGROUND The importance of the isatinic quinolyl hydrazones arises from incorporating the quinoline ring with the indole ring. Quinoline ring has therapeutic and biological activities whereas, the indole ring occurs in Jasmine flowers and Orange blossoms. As a ligand, the isatin moiety is potentially ambidentate and can coordinate the metal ions either through its lactam or lactim forms. In a...

Soils and vegetation were analyzed in 20 lodgepole pine (Pinus contorta) forest stands, varying in age from 50 to 350 years, that had initiated following stand-replacing fire. Our goal was to determine how nitrogen availability (NH4 –N) and microbial community composition varied with stand age-class and to determine whether differences could be explained by canopy, soil, or understory character...

Worldwide water shortage increase and water quality depletion from microbial and chemical compounds, pose significant challenges for today's water treatment industry. Both the development of new advanced oxidation technologies, but also the enhancement of existing conventional technologies is of high interest. This study tested improvements to conventional ozonation that reduce the formation of...

Herein, we consider Müller's spherical, porous, anionic, molybdenum oxide based capsule, (NH4)42[{(Mo(VI))Mo(VI)5O21(H2O)6}12{Mo(V)2O4(CH3COO)}30]⋅10 CH3COONH4⋅300 H2O≡(NH4)42⋅1 a⋅crystal ingredients≡1, {Mo132}, as an effective sugar-decorated nanoplatform for multivalent lectin recognition. The ion-exchange of NH4(+) ions of 1 with cationic-sugars, D-mannose-ammonium chloride (2) or D-glucose-...

Fluorescence and electrophysiological methods were used to determine the effects of intracellular pH (pHi) on cellular NH4+/K+ transport pathways in the renal medullary thick ascending limb of Henle (MTAL) from CD1 mice. Studies were performed in suspensions of MTAL tubules (S-MTAL) and in isolated, perfused MTAL segments (IP-MTAL). Steady-state pHi measured using 2,7-biscarboxyethyl-5(6)-carbo...

This study analyzed the anthropogenic influences on hydrochemical composition characteristics of groundwater in Xiamen City, Fujian province, China, and their evolution. Based data 1993 2019‒2021, this identified indices using mathematical statistical analysis methods, such as contrast coefficient, standard deviation, Mahalanobis distance. The analytical results are summarized follows: (1) numb...