Advanced Materials Research Vols. 1073-1076

Abstract: Composites H₃PW₁₂O₄₀/TiO₂-M (M=Fe, Co, Ni, Zn) were synthesized by combining sol-gel technology with impregnation method. The structures and properties were characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy and UV-Vis diffuser reflectance spectrum (UV-Vis DRS). The XRD and FT-IR results showed that the TiO₂ particles had the anatase phase, and the Keggin structure of H₃PW₁₂O₄₀ remained intact. The UV-Vis DRS results indicated that compared with pure TiO₂, an obvious red shift occurred after introducing H₃PW₁₂O₄₀. The composites were used as heterogeneous photocatalyst to the degradation of methyl orange, and the influences of catalyst dosage, H₃PW₁₂O₄₀ loading and metal ion species were studied. Results show that, under the optimum parameters pH value 2.00, 0.4 g·L^-1 catalyst dosage and 30% H₃PW₁₂O₄₀ loading, 96.6% methyl orange was degraded after 30 min irradiation (365 nm) using composite H₃PW₁₂O₄₀/TiO₂-Zn. The photodegradation process fitted Langmuir-Hinshelwood first order kinetics.

Abstract: Department of Pterocarya stenoptera dicotyledonous juglandales juglandaceae Pterocarya plants, the whole body can be used as a medicine. This article use the continuous reflux method to studying the extraction process of Pterocarya stenoptera leaves of tannins in the area of Jiangsu Rugao. Through single factor experiment and orthogonal experiment to obtain continuous reflux method was used to extract Pterocarya stenoptera leaves of tannins the optimum technological conditions. Through to the extract of ultraviolet and GC-MS analysis results show that, different extraction agents, tannin content of the extractive and chemical composition are different. Deionized water and ethanol aqueous extract of difference for Pterocarya stenoptera leaves decoction and alcohol mechanism of two kinds of different uses for the treatment of disease research to provide the reference.

Abstract: Red mud is the waste generated in alumina industry, which occupies much land and brings great harm to the ecological environment and its disposal and comprehensive utilization has become a major environmental concern of the whole society. This thesis discusses the rehabilitating effect of several amendments on red mud and their influences on the growth of the sorgo seedlings, eventually providing theoretical and technical support for in-situ remediation of the ecological environment red mud stacking area. The results show that the amendments could reduce pH value of the soil; the addition of phosphorus, gypsum and sludge can effectively reduce the pH value. All of these are beneficial to soil’s physical structure and seedling root. At the same time, sludge can provide necessary nutrients to seedlings while promote the metabolism. The research results have both theoretical significance and application prospect.

Abstract: Sequential soil coring and in situ exposure of largely undisturbed soil columns technique was used to study the nitrogen mineralization of five forest types soils in the east side of Gaoligongshan mountains, which were Dry-Hot Vally (D), Montane Rain Forest (MR), Monsoon Evergreen Broad-leaved Forest (M), the Mid-Montane Humid Evergreen Broad-leaved Forest (H), Tsuga Forest (Ts). The results indicated that NH₄⁺-N content decreased for all the forest types soil after four months training, the order of decrease proportion is monsoon evergreen broad-leaved forest (84.1%)> montane rain forest (69.3%)> the mid-montane humid evergreen broad-leaved forest (34.7%)> dry-hot vally (8.7%)> tsuga forest (7.3%). And NO₃^--N content increased for the soils, the increasing multiples is tsuga forest (39.0 times)> dry-hot vally (18.8 times)> the mid-montane humid evergreen broad-leaved forest (4.7 times)> monsoon evergreen broadleaf forest (4.0 times) > montane rainforest (2.8 times). We conclude that NH₄⁺-N is the main form of inorganic nitrogen in forest soil, which is the main reason of changing the soil nitrogen mineralization and mineralization rate.

Abstract: Rice root proteomics research identified to a new remorin1 protein,named OsREM1,which significantly increased (approximately 1.7-fold) compared with control under salt stress by Two-dimensional electrophoresis. It is found that the protein molecular weight is 29 kD, isoelectric point is 4.54. The bioinformatics analysis showed that: (1) The protein contains 195 amino acids, whose theoretical molecular weight is 21.3 kD, whose theoretical isoelectric point is 5.06. There are some differences with the experimental results, which may be the result of post-translational modification, such as glycosylation, phosphorylation; (2) The different crop remorin protein sequence alignment analysis found that the same rate of the amino acids is more than 50%, indicated that remorins are highly conserved protein; (3) Phylogenetic analysis showed OsREM1 had a low sequence identity with potao and tomato REM1, which is the agreement with traditional classification.

Abstract: In order to learn the reaction and adaptability to water stress of Sedum yvesii, the changes in physiology of leaf water saturation deficit (RWD), plasma membrane relative permeability, chlorophyll content and fluorescence parameters were studied in different moisture gradient of water stress. The results showed that: after 20 days for submergence stress, it had an effect on the normal growth of Sedum yvesii; after 30 days for severe drought stress and 10 days for extreme drought stress, it can severely inhibit the growth of Sedum yvesii, even lead to death, which embodied in the dramatic decline of chlorophyll content, Fv /Fm, Fv'/Fm', ETR and the increase of RWD, relative electrical conductivity. The indicators of slight drought stress and moderate drought stress group have little differences with the control group. They did not cause a significant effect on the growth of Sedum yvesii, indicating that Sedum yvesii has a strong ability to these two kinds of water stress gradient.

Abstract: In this paper, soy protein papermaking process conditions as dry strength agents were studied. The results show that a part of the three parts of soy protein and a mixed system with a cationic starch alone, or cationic starch, soy protein, as compared to dry strength additives will significantly increase the strength. The optimum conditions were: pulp types E, defatted soy protein, dry vacuum drying method is 105°C, adding ways to add the pulp, the best reaction time was 10min, the optimum dosage of 2%. Soy protein sources are widely readily available, and environmentally friendly and easily biodegradable, paper dry strength agents as a good material.

Abstract: Cipangopaludina chinensis which is a species of benthic macroinvertebrates was exposed to roxithromycin, and tested the erythromycin N-demethylase (ERND) of kidney, then explored the effect of roxithromycin on the biochemical indicator of C.chinensis. The results showed that roxithromycin had effect on the activity of ERND in the kidney of C.chinensis and the overall trend was promoting at the beginning then suppressing at the end, but the differences of the influence caused by different concentrations of roxithromycin was not obvious. In addition, it appeared from the survival condition of control group and experimental group, roxithromycin which is a kind of antibiotic, had no lethal effect on C.chinensis. But the concentration of roxithromycin which is more than 250 times, 500 times and 750 times of the environment used in this experiment had significant influence on the enzyme activity of the ERND in the kidney of C.chinensis.

Abstract: Water management affects the bioavailability of cadmium (Cd) in the soil and hence their accumulation in rice and grain yields. A pot experiment was carried out to investigate the effects of different water managements (flooding, intermittent irrigation and aerobic) on rice yield and cadmium accumulation in rice plants growing on cadmium contaminated soil. The results showed that compared to the flooding and aerobic treatment, the intermittent irrigation increased grain yield by 7.55-29.58%, which contributed to the increase of seed setting rate and panicle number. Compared with the intermittent irrigation, aerobic treatment significantly increased Cd contents in roots, straw and grains, while flooding reduced the Cd contents in rice. Compared with flooding, both aerobic and intermittent irrigation enhanced Cd distribution in the root and reduced it in the straw and grain. With increasing irrigation from aerobic to flooded conditions, the soil available Cd concentrations decreased significantly. The patterns of soil pH change were just opposite to those of soil available Cd. Thus, intermittent irrigation could increase rice yield and also reduce Cd in the grain.

Abstract: Cipangopaludina chinensis were exposed to different concentrations of Nonylphenol (NP) in experimental groups. The effects of NP on the enzyme activity of erythromycin N-demethylase (ERND) in stomach were studies. The result showed that different concentrations of NP in settlings had different influence on the enzyme activity of ERND. The overall trend was that the activity of enzyme ERND showed decrease tendency at the beginning, then increased. Later, the enzyme activity of ERND in the stomach in the median concentration and high concentration was higher than Group Ⅲ (Environment group). Consolidating half-lethal concentration measurement results NP was shown that it has toxicity, so its impact on the environment can not be ignored.