A chemically defined medium was devised in order to study the requirements for fortimicin A production by Micromonospora olivoasterospora KY 11515. Soluble starch was the best carbon source; NH4Cl and NH4NO3 were suitable nitrogen sources both for the growth and fortimicin production. Amino acids such as L-asparagine, L-aspartic acid and L-glutamic acid showed some stimulatory effects on both g...

Selenium is an essential nutrient with diverse physiological functions, and soluble organic selenium (SOS) sources have a higher bioavailability than inorganic selenium sources. Based on the response surface methodology and central composite design, this study presents the optimal medium components for SOS accumulation in batch cultures of Flammulina velutipes, i.e. 30 g/L glucose, 11.2 mg/L so...

Abstract Ammonium nitrate (NH4NO3) represents a cheap, chlorine-free alternative to ammonium perchlorate for use as an oxidant solid propellants. But its poor ignitability and low burning rate are all disadvantages achieve such purposes. For this reason, it is necessary carry out studies improve combustion characteristics, seeking combine with catalysts or fuels. The present work explores the p...

‘Qingcui’ plum fruit becomes soft at harvesting. In this study, we assessed the effect of following different treatments on various texture parameters: three concentrations nitrogen (NH4NO3 0%, 0.5% and 1%) forms selenium (selenomethylcysteine [C5H9NO2SSe/SeMeCys], sodium selenate [Na2SeO4] sele-nomethionine [SeMet]). The parameters evaluated were fracture, hardness, cohesiveness, springiness, ...

A three-dimensional, size-resolved and chemically resolved aerosol model is developed. Gas-to-particle conversion is represented by dynamic mass transfer between the gas and aerosol phases. Particle-phase thermodynamics is computed by a new thermodynamic model, Simulating Composition of Atmospheric Particles at Equilibrium 2. The aerosol model is applied to simulate gas and aerosol behavior in ...

Comment 1: 8220;8230;Entrained air presumably has low hydrocarbon concentrations which should drive semivolatiles from the aerosol to gas phase. Thus the authors conclusion appears reasonable. However, I’m not sure that it is justified by the data; I don’t think that the fact that there is a very good correlation between WSOC and NH4NO3 automatically rules in favor of a 1/3 2/3 split for both s...