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A strain, which demonstrated the capacity of cellulase production from corn bran, was isolated from rotten apple and has been identified as Botryosphaeria dothidea by 18S rDNA sequence. The effects of corn bran concentration, pH, and temperature on cellulase production were studied and the most optimal parameters were 40 g/L corn bran (dry basis), 42 °C, and pH 3.8, respectively. Elimination of MgSO...
Electrical dc conductivity and laser damage threshold of pure and urea doped KH2PO4 crystals are investigated. It is found that the crystals with a low electrical conductivity have a high laser damage threshold. It is shown that increase of the resistivity and the laser damage threshold of the crystals realizes by the crystal growth from urea-containing aqueous solutions. The optimum molar value of...
The nutritional parameters of protease, which is isolated from mao-tofu and identified as Mucor spp, were studied by response surface methodology (RSM). Glucose, soybean protein and KH2PO4 were analyzed by Box-Behnken design for optimizing their concentrations in the medium and the effect of their mutual interaction on protease activity. Glucose and soybean protein were found in influencing the protease...
Pot experiments were conducted to study the effects of 8 fertilizers (NH4Cl, NH4NO3, Ca(NO3)2, CO(NH2)2, Ca(H2PO4)2, KH2PO4, K2SO4 and KCl) on Ni uptake and distribution by rice. The results indicated that nitrogen and potassium fertilizers had little effect on the biomass and yield of rice, while the phosphate fertilizers significantly increased the biomass and yield of rice. The total amounts of...
A nitrogen conservation model in the thermophilic composting process of simulated food waste, in which phosphate and MgSO4 mixtures (K3PO4 + MgSO4, K2HPO4 + MgSO4 and KH2PO4 + MgSO4 mixtures) were introduced for nitrogen (NH4+-N) conservation, was developed for the management of composting combined with Contois function. The established model showed good agreement with experimental observation for...
Time shaping of ultrashort UV pulses has been performed using a specially designed acoustooptic programmable dispersive filter in KDP material. A time window shaping up to 4 ps has been obtained on the 260-410 nm range.
The characteristics of sunflower (Helianthusannuus) root exudates and their effects on solubility of PCP in different environmental conditions were investigated by the indoor simulation cultivating methods. The results indicated that contents of high-molecular-weight and polarity fractions were very high; the biodegradating percentage increased with time elapsed, and the biodegradating percentage...
This review discusses recent advances in understanding origins of large piezoelectric properties in some ferroelectric materials. In particular, it addresses the role of polarization rotation and monoclinic phases. It is suggested that the polarization rotation is an old concept that was proposed more than 30 years ago to explain enhanced properties of Pb(Zr, Ti) O3 in the morphotropic phase boundary...
The relative dielectric permittivity and the dielectric loss tangent of KH2PO4, KD2PO4, PbWO4, PbMoO4, Al2O3, LiF and KCl single crystals used in laser technique are investigated with the help of the waveguide-dielectric resonances at frequencies of 7 - 12 GHz. The effect of gamma-irradiation with doses up to 2middot105 Gy on the characteristics of crystals is determined . It is observed that pure...
With the increasing concern about the toxicity of hexavalent Chromium (Cr6+) in electrical and electronic equipment under the restriction range of EU 2002/95/EC Directive, which is known as RoHS coming into force from 1st in July 2006, a combined technique to determination of the special hexavalent chromium was studied in this paper. Firstly, by EDXRF screening, the presence of the Cr element or not...
The effect of gamma-irradiation on electrical dc conductivity of potassium dihydrogen phosphate KH2PO4 (KDP) single crystals widely used in quantum electronics devices is investigated. The measurements of bulk conductivity were realized within 20-100 degC temperature interval. The conductivity in the samples of KDP was found to essentially decrease with an increase of gamma-irradiation dose. The temperature...
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