bluuebunny/crossref_metadata_2025 huggingface dataset:
Simulation of MSW Pyrolysis/Gasification Processes for Power Production
Authors: Chaisanguan Chayanee , Patumsawad Suthum , Narataruksa Phavanee
Published: September 2013

With the rapid expansion of industry, urbanization and increasing population in Thailand, many cities face the problem of municipal solid waste (MSW) disposal. The great majority of a plant for MSW, which are in operation around the world, are based on mass burn incineration systems. There are, however, a number of novel, thermal processing technologies for MSW, based on pyrolysis and/or gasification of the waste, which may provide significant technical and environmental advantages over conventional incineration. The objective of this article is to investigate the effect of operational parameters to electricity produced efficiency. The processes consist of drying unit, thermal waste treatment unit which is comprised of pyrolysis, gasification and combustion units, heat recovery steam generation unit, power generation unit and gas cleaning unit. The article are applied to the performance analysis of a MSW power plant in case of after passing through drying unit pyrolysis unit was operated at constant MSW feed rate of 28 tonnes/hr with varied moisture content. At lower moisture content which led higher energy content and more excess air required, the efficiencies of system were increased.
Degradation of Low Concentration PAEs in the Tail Water of Municipal Sewage Plant by H2O2/O3
Authors: Zeng Yan Yan , Fan Hong Bo , Lv Si Hao , Liang Zhi Hui , Luo Qun
Published: September 2013

The degradation of PAEs (DMP, DEP and DBP) at low concentration (μg·L-1 range) by the O3 oxidation and H2O2/O3 oxidation process were investigated in this study. The experiment results showed that the H2O2/O3 ratio was 2.0, the pH value was 10, the PAEs removal rates were 90%~95% in model wastewater, and were over 70% in the tail water from municipal sewage plant with the H2O2/O3 oxidation process.
Research on Pollution Status and Risk Assessment of Environmental Hormone in Aquaculture Seawater of Shenzhen, China
Authors: Lv Dai Zhu , Tang Yong Jiao , Yuan Hong Qiu , Li Jian Guo
Published: September 2013

The concentrations of five different kinds of environmental hormone which including nonyl phenol, bis-phenol A, methyltestosterone, megestrol and diethylstilbestrol in aquaculture seawater of Shenzhen have been studied. Their risk quotients (RQ) are calculated to evaluate the risk to seawater pollution. The results showed that the RQs for the five environment hormones are nonyl phenol (0 - 0.07), bis-phenol (0-2.15), methyltestosterone (0.17), diethylstilbestrol and megestrol (not found). Bis-phenol belongs to chronic potential ecological risk in the water and sediment. The purpose is to provide clues for improving Chinese Eco-risk assessment techniques and thus to enhance security of mariculture in China.
Electrochemical Reduction of Carbon Dioxide on Stainless Steel Electrode in Acetonitrile
Authors: Lv Wei Xin , Zhang Rui , Gao Peng Ran , Gong Chun Xia , Lei Li Xu
Published: September 2013

Electrochemical reduction of carbon dioxide (CO2) to useful organic compounds is of great significance to decrease CO2 emission. The electrochemical reduction of CO2 is carried out in acetonitrile with tetrabutylammonium perchlorate as the electrolyte on a stainless steel cathode in a single cell; by using a sacrificial zinc anode, the product is zinc oxalate when the cathode potential is between 2.5 V and 3.5 V vs. Ag rod electrode. When the potential is less than 3.5 V, acetonitrile is decomposed, and the product is mainly zinc cyanide; when it is higher than 2.5 V, the main product is a basic zinc carbonate. Therefore, only when the cathode potential is in a proper range can CO2 molecule obtain an electron and dimerize to form C2O42, which combines Zn2+ from the anode to form zinc oxalate.
Study on the Countermeasures of SO2 Emission Reduction in Chengdu Economic Circle
Authors: Wang Wen Yong , Ke Bo Jun , Fu Gao Ping
Published: September 2013

Based on a detailed survey on the source and volume of SO2 emission over Chengdu economic circle, the third-generation air quality model CMAQ is adopted for simulating the concentration of SO2 in the air over Chengdu Economic Circle. The results show that the hourly average concentration, daily average concentration and annual average concentration of SO2 in air exceed the limit of national standard, and the affected areas respectively account for 0.12%, 0.18% and 0.03% of the total area of the economic circle. Meanwhile, according to the result of calculation, the SO2 emissions of thermal power plants, chemical industry, building materials plants and industrial area sources make the largest contribution to the SO2 concentration in the air, with ratios of 36.15%, 18.67%, 11.81% and 8.34% respectively. thus,main measures to reduce emissions of SO2 in Chengdu economic circle are proposed as follows: focusing on the control of the emissions of SO2 from industrial enterprises, especially in the thermal power plants, chemical industry, building materials plants as well as industrial boilers; joint prevention and control measures should be implemented between the cities, so as to reduce the interaction caused dy emissions of SO2. With the application of the above measures, the total SO2 emissions can be reduced by 50% and the concentration of SO2 in the air can meet with the Class II of national ambient air quality Standard.
Analysis of the Relationship between Electrostatic Dust Removal Efficiency and its Factors in Coal-Fired Power Plant
Authors: Li Zhen , Cao Chen Yu , Ren Jian Xing
Published: September 2013

With the national environmental standards becoming more and more strict, electrostatic precipitators is facing the new challenges, promoting the efficiency further and reducing emissions are essential to achieve the environmental standards. This paper analyzed the influential factors of the dust removal efficiency of electrostatic precipitators in coal-fired units, and discussed the relationship between dust removal efficiency and its factors, which lay the foundation for improving the dust removal efficiency.
Experimental Study on Photocatalytic Pretreatment of Restaurant Wastewater with Nano TiO2
Authors: Huang Jin Yong , Peng Li Bin , Peng Lin
Published: September 2013

The study aims at investigating the performance of nanoTiO2photocatalytic oxidation technology for the pretreatment of restaurant wastewater. The rate of lipids removal depends on conditions, such as irradiation time, TiO2dosage, aeration and addition of Fe3+or H2O2.The optimal conditions are determined: proper time of irradiation 10 min, TiO2dosage 25mg/L,pH6.0, adding 5mL Fe3+. Under this optimum, the removal efficiency of lipids reaches 74.7 ~ 88.6%, and that of CODcr was around 45.2~76.2%.While using illumination for 10 min, companied with TiO2and Fe3+/H2O2, the removal efficiency of Grease could increase by 3%~15%.Thus, satisfactory results were achieved for pretreatment of Grease Wastewater from restaurant, and this technique could be used as a pretreatment step for next biological treatment of restaurant wastewater.
Impact of Mine Waters of Abandoned Coal Mine «Avangard» on the Environment
Authors: Nazarkina A.V. , Arefieva O.D. , Kadyrova T. M. , Buyanova L. G. , Savenkova E. M.
Published: September 2013

Abandonment of «Avangard» Coal Mine and its Flooding Caused the Decrease of Natural Waters Quality and Caused a Threat of that Area’s Pollution. Statistical Analysis Showed that due to Transfusion of Various Horizons Waters, close Dependencies between the Quality of Mine Waters, River/well Waters and Soil Solutions are Observed. Mine Waters are Transforming Not only the Composition of Natural Waters and Wells but have Great Impact on the Composition of Soil Solution. Growing Mineralization of Mine Waters Causes Active Flowing out of Chrome, Copper, Iron, Nitrates, Suspended Matters, Silicon Compounds, Sulfates, Phosphates and Sulfides. as Ph Grows, the Mobility of Chrome, Copper, Nitrates, Silicon Compounds, Sulfates and Phosphates is Decreasing. they are Consolidated in Soil.
Characteristic of Thermal Structure in Reservoir in Different Climate Zones
Authors: Jiang Ding Guo , Bie Yu Jing , Liu Wei
Published: September 2013

A three dimensional mathematical model was used to simulates water temperature structure of a model reservoir under the southwest plateau climate and the subtropics monsoon climate separately. The calculated result shows that: 1. in the Southwest plateau climatic region, obvious double convection was noticed of the surface water, while single convection appears in subtropics monsoon climatic region. 2. Thermal stratification in tropics monsoon climatic region is steadier than the southwest plateau climatic region. 2. In the subtropics monsoon climatic region the water temperature difference between discharge and natural water is more remarkable than the Southwest plateau climatic region, namely that in the subtropics monsoon climatic region the impact of discharge water on downstream water temperature is more appreciable. The research conclusion may provide reference and the basis for the contrastive analysis of related achievement in reservoir water temperature and the water environment.
Calculation Method of Natural Leymus chinensis Evapotranspiration under Shallow Groundwater Level Condition
Authors: Liu Yan Wei , Han Xiao Ping , Jing Yu Long
Published: September 2013

Natural Leymus Chinensis evapotranspiration in the Otindag sandy area under shallow ground-water level condition is calculated based on Soil-Water-Atmosphere-Plant (SWAP) Model developed by Wageningen Agricultural College. The observed values in open test and interior experiment, the meteorological observation and crop index, and the data of soil volumetric moisture content in 2005, are used to calibrate parameters of SWAP model, determine and check out the water transfer parameters of SWAP model with soil volumetric moisture content in 2006. The result shows that SWAP model has high precision and can be use to simulate evapotranspiration under shallow groundwater level condition.
Effect of Bromus inermis Leyss Planting on Dynamic Changes of Soil Moisture Contents on the Bare Slope
Authors: Sun Tie Jun , Tajilake Baderihu
Published: September 2013

Experiment was executed to plant eco-grass of Bromus inermis Leyss on 15°bare slopes, and study effect of biological characters on dynamics of soil moisture contents. The results indicated that vegetation restored quickly on the bare slope after the eco-grass planted. There were 2473.4 kg/hm2 of overground biomass and 1744.1kg/hm2 of underground biomass, and 70% of underground biomass was in 0-10cm layer of soil. Meanwhile, there was a regulatory mechanism of soil moisture content for Bromus inermis Leyss. When rainfall was enough, soil moisture content in 0-80 cm layer could reach to the most of 26.83% quickly this year. Next it could decline near to the first value of 19.81% after rainfall stopped, and keep a dynamic balance between 19.48% and 19.96%. Moreover, the regulatory mechanism realized though underground biomass, and was clearer with underground biomass increasing, especially in the 0-40cm layer of soil.
Study on the Models of Water Shortage and its Simulation Analysis
Authors: Tang Wen , Gao Ying , Ding Yi
Published: September 2013

This paper introduces several mathematical models in order to analysis and solves the problem of the water shortage in China. Some economic strategies have been concluded for government. The strategies include adjusting water fee, constructing reservoirs and water transfer.
Complexity of Groundwater Dynamic in Jiansanjiang Based on Fractal Theory
Authors: Wei Run Chu , Xiao Chang Lai , Liang Xiu Juan
Published: September 2013

The complexity of Groundwater dynamic was determined based on the fractal dimensions of groundwater depth sequence of all farms in Jiansanjiang calculated in Grassberger-Procaccia algorithm. It is showed that groundwater dynamic in Jiansanjiang is of certain complexity for fractal dimensions of all wells greater than 1. The complexity of groundwater in Jiansanjiang has a significant spatial variance structure characterized with the complexity of groundwater dynamic in the northwest lower than that in southeast, which indicates that the groundwater system in the southeast fluctuates more strongly and affected by natural and human disturbances more seriously.
Application of γ Spectra Measurement in the Research of Lake Sediment and Palaeoenvironment
Authors: Xu Zheng Qi , Song Hao , Zhang Cheng Jiang
Published: September 2013

Xigeda Formation layer, which is widely distributed in Panzhihua area, is researched by the method of γ spectrum measurement. Qinglongshan Xigeda Formation profile is measured by the low-background multi-channelγenergy spectrometer in Panzhihua, the change rules of radioactive elements, including URa, Th, K, Ir and Ira on the profile are analyzed in detail. The characteristics and palaeoenvironmental significance of the sediment layer on the profile is researched by combining the geological features. The results show that the contents of radioactive elements in Xigeda Formation profile reduce obviously from the old to the new layer and change regularly and the radioactive characteristics are consistent to the sediment geological features. All these show that the γ spectrum method is a good one for the study of lake sediment and palaeoenvironment.
Comparative Study of the Blooms in Spring in Xiangxi Bay at Three Gorges Reservoir
Authors: Yang Liu , Song Lin Xu , Lv Yao
Published: September 2013

Frequent spring blooms have been observed in Xiangxi Bay (XXB) at Three Gorges Reservoir (TGR) since its initial filling. To identify the primary factor controlling spring blooms, in the spring of 2010 and 2011, a field monitoring plan was carried out in the area (XX) where serious blooms outbroke in XXB The environmental factors which includes Chlorophyll a (Chl-a), nutrients, water temperature, secchi depth, etc. were involved. According the comparative analysis on the environmental factors of spring 2010 and 2011 in XXB, We study the relationship between water temperature and Chl-a. The results show that the spring blooms in 2010 is earlier than that in 2011. Comparative analysis on water temperature in the two years showed that surface temperature in spring 2010 continued to rise earlier than in 2011, and also the time that surface temperature continued to rise is the same to the time Chl-a concentrations increased. When the total nitrogen (TN) concentrations decreased, relative water column stability increased, and the time that mixing depth (Zmix) decreased were the same to the time when the surface temperature continued to rise. While the Water temperature increased, utilization of algal on nutrient , promoted development of thermal stratification, Increase of relative water column stability, and the sudden decrease of mixing depth resulted in the blooms. Rising surface temperature continued to rise was one of the primary induction factors to the spring blooms in XXB.
Impact of Chinese Expressway on the Ecological Environment
Authors: Wang Zuo Gong , Li Hui Yang
Published: September 2013

Expressway has a deep, irreversible influence on the ecological environment. Through assessment and evaluation on several expressways in the territory of China, this paper shows that the main source of air pollution caused by expressway is motor vehicle exhaust and dominated by lead pollution; noise pollution caused by expressway is mainly traffic pollution along the road during operation. However, the noise pollution is seriously overweight; the construction and operation of expressway has an impact on water environment, water and soil conservation and living environment for animals and plants. At the same time, the closure of expressway operation has impeditive functions to residents living along the road.
Research on Resources Carrying Capacity of Shanghai
Authors: Lv Kang Juan , Peng Yu Cong
Published: September 2013

With the accelerated pace of urbanization, the conflicts of natural resources and urban environment have intensified. This paper summarize the resource carrying capacity method, taking the municipal city Shanghai as sample, calculated Shanghai carrying capacity of water, land and integrated resources. It is found that Shanghais resources carrying capacity has reached its saturation. Therefore, saving water resources, using land rationally and controlling population suggestions have been put forward to Shanghai.
The Economic Interpretation of Property Structure about Rural
Authors: Ji Liu He , Song Yang , Wang Shu
Published: September 2013

At present, the most important thing is how to solve the contrary between rural land institution and economical environment. According the logic of property which has the different structure have no the difference of which is good or which is bad, Then we test the land property structure according the facts of the peasant's income and land policies in 30 years of reform, the conclusion is that the land property structure need not changed, we should optimize it. The emphasis is optimizing the land use right the optimum, the optimum way is the circulation of contractual operation.
Study on Old Community Renovations' Management Patterns of Shenyang City
Authors: Meng Xing , Li Meng Ling
Published: September 2013

With the development of economy and society, the pace of urbanization process is fast. And old community renovation has become the focus of government and residents. This paper summarizes several typical renovation management patterns. They have some guidance and reference value for other old community’s renovation.
Study on BP Artificial Neural Network of Old Community Renovation's Livable
Authors: Li Meng Ling , Meng Xing
Published: September 2013

“Living and working in peace and contentment” is the ideal goals of people since the ancient times, while old community’s renovation is an important aspect of it. This paper firstly analyzes the definition of livable community and the necessity of old community’s renovation，establishing the livable evaluation index system about old community’s renovation, and try to use the BP artificial network to analysis the livability.
Application of Garden Art in Modern Sightseeing Agriculture Planning
Authors: Cheng Hao , Dong Suo Cheng , Li Yu , Li Ze Hong
Published: September 2013

Modern sightseeing agriculture is a new type of agriculture, which is developed on the basis of traditional agriculture, gets agricultural production and tourism and leisure together. In the planning of modern sightseeing agriculture, integrate the garden art theory, create a unique landscape with agricultural characteristics, which can enrich the spiritual life of the people, achieve organic unity of economic, social and ecological benefits. This article combines garden art with modern sightseeing agriculture, gradually elaborates the application of garden art in modern sightseeing agriculture from four levels such as philosophical thought, layout concept, spatial and temporal concept, and emotion view, researches on several projects of sightseeing agriculture in minority concentrated region of China, completes the overall artistic interpretation to modern sightseeing agriculture garden, provides a new way for development of modern sightseeing agriculture, has great significance of guiding the modern sightseeing agriculture to realize diversified development.
Analysis on the Effect of the Farmer Diversification Level on the Land Sustainable Use
Authors: Luo Fang , Tian Miao , Wang Qing
Published: September 2013

As the Chinese urbanization and industrialization procedure fasted, the farmer’s diversification level eventually arises. In the meanwhile, serious water loss, soil erosion and soil fertility decline sharpen the man-land contradiction. Therefore, the land sustainable use refers to agricultural health development and Chinese food safety. The econometric tool is used to analyze the effects factors of land use patterns, such as land abandon and extensive use, tree crop and perennial crop planting, seasonal crop planting, keeping irrigation and drainage canal unobstructed, the rate of applying farmyard manure, and building methane tank, etc. It is concluded that the level of farmer’s diversification has dual effects, which are helpful to overcome capital constrain as well as decreasing the motive for investing on conservation of water and soil since diversification results in peasant household reducing dependence on agriculture.
The Application of Lianas to Uban Vertical Planting - A Case Study of Haizhu District of Guangzhou City, China
Authors: Liu Hui
Published: September 2013

The application of lianas to uban vertical planting has become increasingly important as a focus of urban environmental and landscape management. The objective of this study was to analyze the lianas application in Haizhu district, Guangzhou city. The study showed its disadvantages of lack of more spieces, simplicity of application form, poor study of physiological and ecological characteristics and lack of management in lianas of urban greening which was attributed to low important focus on lianas appliaction in the last decades in this district. A few pieces of advice were put foward to improve the situation. It is expected that more lianas green spaces will provide environmental services and landscape beauty.
Assessing the Eutrophication Status of Qixing Wetland and the Effect of Plants
Authors: Xu Yi Xin , Zhang Hua Yong , Li Zong Han , Li Fei , Xu Xiang
Published: September 2013

The comprehensive trophic level index has been applied to assess eutrophication status of QiXing Wetland. The five subzones of QiXing Wetland with different vegetation pattern have different eutrophication status. The comprehensive trophic level index is mainly affected by TN and TP at high concentration of nitrogen and phosphorus. Therefore, the plant communities can significantly influence on eutrophication status of the wetland through removing nitrogen and phosphorus in water. Three mainly dominant plants in wetland are Phragmites australis, Nelumbo nucifera and Typha orientalis Presl. The ability to remove nitrogen and phosphorus of these three plant communities were investigated. Typha orientalis Presl community has the maximum efficiency in removing nitrogen and phosphorus in water. Therefore, Typha orientalis Presl is more suitable for the purification of the water.
The Water Conservation Capacity of the Ecotone of the Forest and Grassland in HulunBuir
Authors: Li Lin , Chen Yan Mei , Wang Yan Ping
Published: September 2013

Based on the remote sensing data and meteorological data of MODIS, this paper studied the water conservation capacity of different land use type of the ecotone of the forest and grassland in Hulun Buir with the help of the ArcGIS software. The results shows that the average of the water conservation capacity of 11 years of the whole ecotone of the forest and grassland in Hulun Buir is 62.78×108m3/yr. Among of these, the forest land accounts for 69.37% of the total water conservation capacity, and the grassland, the cultivated land and the unused land account for 23.36%, 3.67% and 3.60%. And the water conservation capacity of the four land use types presented a fluctuated improving trend. The average water conservation capacity in each year of the unit area of the ecotone achieved its maximum value, 498.43m3/hm2 ,in 2003, and achieved its minimum value,193.03m3/ hm2,in the year of 2007.
GIS-Information Method Based Risk Evaluation for Debris Flow in Chencang District
Authors: Xue Xi Cheng , Zheng Liang Liang
Published: September 2013

This study chooses chencang district in Baoji city as the study area.To use ArcGIS combination information method, slected engineering geological lithologic, ground motion peak acceleration, geological structure, elevation, geomorphological types, slope, annual rainfall, human engineering activities and land use type as the main evaluation factors,for debris flow risk assessment. Debris flow risk is divided into an extreme high risk,high risk,moderate risk,low risk and extreme low risk levels,The evaluation result show that 11.01% of area is extreme high risk,include 12 debris flows; 24.94% of area is high risk,include 9 debris flows; 20.78% of area is moderate risk,include 4debris flows; 26.35% of area is low risk,include 3 debris flows;16.92% of the area is extreme low risk areas,there is no debris flows.
Quantitative Analysis of Forsythiae fructus by Near Infrared Spectroscopy
Authors: Bai Yan , Duan Xiao Yan , Gong Hai Yan , Xie Cai Xia , Chen Zhi Hong , Lei Jing Wei
Published: September 2013

In this paper, the content of forsythoside A and ethanol-extract were rapidly determinated by near-infrared reflectance spectroscopy (NIRS). 85 samples of Forsythiae Fructus harvested in Luoyang from July to September in 2012 were divided into a calibration set (75 samples) and a validation set (10 samples). In combination with the partical least square (PLS), the quantitative calibration models of forsythoside A and ethanol-extract were established. The correlation coefficient of cross-validation (R2) was 0.98247 and 0.97214 for forsythoside A and ethanol-extract, the root-mean-square error of calibration (RMSEC) was 0.184 and 0.570, the root-mean-square error of cross-validation (RMSECV) was 0.81736 and 0.36656. The validation set were used to evaluate the performance of the models, the root-mean-square error of prediction (RMSEP) was 0.221 and 0.518. The results indicated that it was feasible to determine the content of forsythoside A and ethanol-extract in Forsythiae Fructus by near-infrared spectroscopy.
The Application of Carbon Footprint in Agri-Food Supply Chain Management: Case Study on Milk Products
Authors: Xu Chang Chun , Huang Jing , Chen Fu
Published: September 2013

In the process of supply chain management, the environmental impact is one important concern. Carbon footprint is a popular metric to quantify a products greenhouse gas (GHG) emissions, and assist supply chain management. In this paper, carbon footprints were calculated for three common milk products, 180 g Yogurt, 250 mL Fluid milk and 400g Skim milk powder (SMP) at the product brand level (YiYi®). The results demonstrated the well comprehensiveness and practicality of carbon footprint as streamlined indicator in supply chain management for agri-food products. The carbon footprints were compared among different life cycle stages as well as different products, and possible mitigation strategies were put forward for GHGs reductions. The relative contributions that different phases over the supply chain make were highlighted. On-farm emissions from cropping and livestock subsystems made up the majority of the carbon footprint, which deserved special attention in agri-food sector.
A Study on the Impact of Atmospheric Cd Exerts on the Soils Accumulation of Qingdao Urban Area
Authors: Zhang Chun Rong , Zhang Chun Jin , Wu Zheng Long , Gao Zong Jun
Published: September 2013

To study the impact of atmospheric Cd exerts on the soil accumulated of Qingdao urban area, atmospheric dust and soil samples are collected and analyzed. Based on these tested samples, this paper firstly analyzed the geochemistry characters of Cd in atmospheric dusts and soils using the statistic analysis method. Then according to the time accumulation model about the influence of Cd exerts on soil, this paper predicates the influence that atmospheric Cd in dust exerts on soil 20 years later. Analysis results show that atmospheric Cd has great influence on the accumulated soil. For example, it can cause the deterioration of soils quality. Therefore, to prevent soil from Cd pollution, the detection and control of atmospheric Cd should be strengthen.
Effect of Yeast Extract on L-Tryptophan Production in Batch Culture of Escherichia coli
Authors: Chen Xiong , Jin Zi Wei , Li Xiao , Wang Zhi
Published: September 2013

The effects of different yeast extracts (YEs) and the growth-limiting factors (L-leucine) on the growth ofEscherichia coliand the yield of L-tryptophan (Trp) were investigated in this study. YE A was most beneficial for the Trp production and DCW among five YEs. The maximum DCW was 0.646 g/L (36.6% higher than the control) when 0.4845 g/L Leu was supplemented in 100 ml media in a 500 ml flask, and the maximum yield of Trp was 0.0259 g/L, which was about 52.4% higher than the control (0.0170 g/L). Furthermore, the maximum DCW was up to 23.9 g/L (34.3% higher than the control) when 0.4845 g/L Leu was supplemented in a 10 L fermenter, and the maximum yield of Trp was 0.983 g/L, which was about 34.8% higher than the control (0.729 g/L). These results indicated that Leu was beneficial for the growth ofEscherichia coliand the yield of Trp.
Characterization of Putative a (1,3)-β-D-glucan (curdlan) Synthase for a Low Molecular Weight Curdlan Biosynthesis from Agrobacterium sp. M503
Authors: Li Yu Mei , Li Qiang , Han Sheng , Song Dong Xue , Qu Yan Hong , Liu Ting Ting , Zheng Yu Xia , Liu Ying Zi , Zhao Zhi Wen
Published: September 2013

A β-(1,3)-D-glucan (curdlan) synthase gene for a low molecular weight curdlan biosynthesis, crdSAg, from Agrobacterium sp. M503 was cloned and its encoding protein was characterized by several online protein analysis softwares. The crdSAg consists of 1965-base-pairs Open Reading Frame (ORF) encoding a protein with molecular weight approximate 73.5 kDa, which contains the conserved domain of CESA-CelA_like belonging to glycosyltransferase family 2 (GT2). Moreover, CrdSAg was a membrane protein with seven hydrophobic transmembrance domains. The second structure analysis indicated it was composed of 43.12% α-helix, 17.89% β-sheet, and 38.99% random coil structure. These data will lay a foundation to clarify the biosynthesis mechanism of the low molecular weight curdlan.
The Underground Grain Storage Environment Regionalization
Authors: Pei Yu Bin , Feng Yong
Published: September 2013

Our current storage work whether in grain storage concepts or grain storage technology with the green grain storage requirements have a large gap, due to national land resources increasingly tense at the same time, to save land and improve the quality of the food, the granary built underground is the trend, This paper by studying the different regions of our country's ground temperature, underground water, soil and other factors, and in accordance with the general principles of the partition,in accordance with the higher the score, the more favorable for the construction of underground building principle, using AHP to determine the weight of each indicator to study different regional underground grain storage buildings environmental suitability level, the establishment of underground grain storage environment regionalization research results to guide the construction of underground storehouse in our country has a certain application value.
Fast Determination of Active Components in Fructus Corni by Near Infrared Spectroscopy
Authors: Gong Hai Yan , Hu Ya Nan , Xie Cai Xia , Cui Yong Xia , Bai Yan
Published: September 2013

Today, near-infrared (NIR) has been proved to be a powerful analytical tool. It has been applied widely in agricultural, petrochemical, textile and pharmaceutical industries. In this paper, near-infrared spectroscopy (NIRS) combined with partical least square (PLS) was used as a qualitative tool to rapidly determinate two active components in Fructus Corni. The PLS calibration model of NIR Spectroscopy, the correlation coefficients (R2) of Loganin and Morroniside were 0.95895 and 0.98450, the root-mean-square error of cross-validation (RMSECV), the Correction of deviation, the prediction mean square error was 0.0344,0.109;0.0625, 0.2641 and 0.0948, 0.233. The result shows that, the near-infrared Reflectance Spectroscopy could be used to determinate the content of Loganin and Morroniside, and meanwhile as a simple and rapid new method for the quality assessment of Fructus Corni. In addition, the NIRS has a unique advantage in the quality control of traditional Chinese Medicine (TCM), such as rapid, accurate, nondestructive and no pollution. It is expected to be further uses in the quality control of TCM. It is can achieve the requirement of rapid detection of large quantities of Fructus Corni.
Methyl Bromide Alternatives for Root-Knot Nematodes Control in Tobacco Transplant Production
Authors: Zhang Cheng Sheng , Kong Fan Yu , Zhang Yu Qin , Wang Jing
Published: September 2013

Field studies were conducted to evaluate potential methyl bromide alternatives against nematods in tobacco (Nicotiana tabacum L.). Metham-sodium and dazomet were evaluated respectively under a polyethylene cover as alternatives for methyl bromide in tobacco transplant production over a two-year period (2009-2010). One genera or species of nematodes, tobacco root-knot nematod (Meloidogyne spp.), was evaluated in Qingzhou, Shandong province of China. All of the fumigant candidates were successful in controlling the pest. Another Parameter, plant vigor, was measured too. Metham-sodium 60g/m2, dazomet 80g/m2 and methyl bromide were not significantly different (P=0.05) from each other in the parameters evaluated. Results of this study indicate that Metham-sodium and dazomet are potential methyl bromide alternatives available to growers for use in tobacco parasite nematods control.
Tanshinone IIA Rapid Analysis of Jingutongxiao Pills by Near-Infrared Spectroscopy
Authors: Lei Jing Wei , Gong Hai Yan , Li Lei , Xie Cai Xia , Duan Xiao Yan , Chen Zhi Hong , Bai Yan
Published: September 2013

Traditional Chinese medicine(TCM) preparation has a long history in China，and now it is an important direction at the development of hospital preparations, because lacking of quality control technology, quality of the different production batch is not quite stable in the process of production. Therefore, to establish perfect, accurate, rapid quality evaluation method is the key to realize modernization of the traditional Chinese medicine preparation[1,2]. The paper establishes the quantitative analysis model for Tanshinone IIA in Jingutongxiao Pills by near-infrared spectral technology. Through the discussion of spectral wavelength, spectral pretreatment and principal component count, it was found that the second derivative combined with partial least squares (PLS) establishes a best quantitative calibration model. The correlation coefficient of calibration (R2)was 0.975 37, the Root Mean Square Error of Cross Validation (RMSECV) is 0.001 17 and the external prediction deviation (RMSEP) is 0.00174. It indicated that the near-infrared spectral technology could be used for rapid, accurate, nondestructive determination of Tanshinone IIA in Jingutongxiao Pills[3,4].
Attenuation Rule of Underwater Irradiation of Artificial Light Source
Authors: Gao Ze Jin , Zhang Xian Qiu , Wang Guo Xiang , Zhang Liang , Wang Min Qing , Ni Zai Yong , Yan Chao , Lu Rong Jun
Published: September 2013

Using artificial light source to supplement light for submerged plants in water where the illumination is insufficient can promote the growth and improve the purification ability of submerged plants. The attenuation rule of underwater irradiation is the key to design and place the lamps. High-precision underwater spectrograph was adopted to study the underwater light spectrum and attenuation rule of underwater irradiation. The results showed that the attenuation rate of total irradiation (E) with depth (h) and turbidity (t) in algae water is the most remarkable; the relationships of E with h and t in different water were E1(t,h)=E0e-K(t)h=E0e-(0.1345t+0.1206)h(muddy water), E2(t,h)=E0e-K(t)h=E0e-(0.203t+0.4684)h(algae water) and E3(t,h)=E0e-K(t)h=E0e-(0.1708t+0.2279)h(mixed water). By these relationships, the position of artificial light could be calculated.
The Space Quantitative Anomaly Seeking of Geochemical Elements Combination and Source Tracing Analysis
Authors: Chen Guo Qiang , Lu Lai Jun , Cao Meng Xue
Published: September 2013

Abnormal analysis of geochemical elements is a significant link in the mineral resources prediction. Element anomaly often directly or indirectly reflects the existence of mineralization anomaly. Due to the polyphyleticism of the metallogenic material and ore-forming process is characterized by multiple stages. there are two type of the metallogenic elements ,i.e., main ore-forming elements and associated elements. Therefore, it presents different assemblage characteristics in the spatial distribution, which also exist in the abnormal distribution. The spatial distribution mechanism of the combination elements are relate to geological conditions and the property of the elements. Based on the geochemical and transport theory, we explore the space quantitative anomaly seeking model. Then we proposed a new method - source tracing analysis for the inference of ore-caused anomaly from the combination anomaly, and the criteria of the proposed method is given. It can realize the intelligent search of the middle-large scale mineral resources prediction target effectively.
Applications of Spectroscopic Methods for Structural Analysis of Synthesis and Natural Crystals
Authors: He Tao
Published: September 2013

Crystal is of people's favorite now. Many people had done lots of work to explore the coloration mechanism of crystals, and until now there is no complete conclusion. So, we studied the coloration mechanism of synthetic crystal and nature crystal by the Violet-Visible Spectroscopy and radio-luminescence. The results showed that coloration mechanism of color rock crystals (amethyst, citrine, smoky quartz and rose quartz) were color center coloration.
Analysis of Ore-Controlling Factors and Prospecting Potential of the Luziyuan Lead-Zinc Deposit in West of Yunnan
Authors: Xiao Zhi Cai , Deng Ming Guo
Published: September 2013

Luziyuan lead-zinc deposit located in Fengwei, Zhenkang,Yunnan Province, at the direction of 140°, horizontal distance is about 10km. The deposit closely related to acidic magmatism and geological structure. According to the latest exploration results of Yunnan Geological Survey, the amount of lead-zinc resources is 280 million tons, it is super-mega deposit. Mineralization factors as tectonics, deep fault, concealed rock, ore formation and surface north-east trending fault zone control the formation of the deposit. Gravity abnormal, magnetic abnormal, geochemical abnormal and associated mineralization of the mine relate to prospecting potential.
Analysis of Tectonic Evolution History in Chaochang Area, Daqing Oil Field
Authors: Chen Yang , Liu Da Meng , Li Zi Nan
Published: September 2013

Results of advanced tectonic interpretation show that the growth structures in the Chaochang area mainly include the basin basement growth faults, the cap formation growth faults and the reversal anticline. In order to exactly explain the evolution history of the tectonics, a numerical modeling study was done for a selected tectonic profile by using the TSM software. The modeling researches include recovering denudation thickness, decompaction correction and faults elimination correction. Results show that the study area principally experienced faulted period, fault-depressed diversionary period, depression period and reverse period. Comprehensive study of the tectonic interpretation, the recovery of tectonic evolution sections and the quantitative analysis of extension parameters, indicates that Chaochang area developed the upper and lower fault systems that were bounded by Denglouku Formation by the extension stress.
Structural and Coal-Controlled Characteristics of Boli Coal Basin
Authors: Guo Ai Jun , Xu Hao , Chen Li Min , Li You Fei
Published: September 2013

Boli coal basin has abundant coal resources and its structure shows southward protruding arcuate structure. There is difference about basement in western and eastern, so it can be further divided into continental craton basement in west and continental craton edge active zone basement in east. For this reason, the coal-bearing strata at the west is stable and its structure is relatively simple. On the contrary the eastern coal-bearing strata is less, poor-quality and thickness is unstable. There are two groups of faults and four folds that mainly control coal-bearing strata distribution. It can be divided into six coal-controlled structural styles in Boli coal basin based on system analysis and summarized about geological exploration data.
Study on Reasonable Filling Width of Gob-Side Entry Retaining and its Engineering Application
Authors: Wang Xiang Qian , Meng Xiang Rui , Gao Zhao Ning
Published: September 2013

Based upon the engineering background of IV315 coal mining face of Mengzhuang Coal Mine, the numerical simulation software UDEC is used to analyze rational packing width under the conditions of different filling widths on the driving roadway. The rational coal pillar size is initially decided as 2.0 meters through simulating and analyzing. On this basis, the influence of second mining on the retaining roadway was analyzed by numerical simulation. Combined with the field measurement, the support parameters and the 2.0 meters packing width are proven to be rational, which provides a reference for the coal mining faces with similar conditions.
A New Method to Quantitatively Partition "Three Zones" of Coal Spontaneous Combustion Based on Key Parameters
Authors: Ma Xiao Feng , Deng Jun , Zhang Xin Hua
Published: September 2013

the paper determines and calculates the parameter of coal temperature distribution rule and oxidation thermal intensity in the stage of low temperature oxidation of radiating heating, builds the mathematic model with 5 key parameters which affect the coal spontaneous combustion, newly defines a probability function to descript the coal spontaneous combustion dangerous degree, then puts forward a quantitative evaluating parameters: the different value of the indicator represents different dangerous area, a fully extinguished zone, a base extinguished zone, a heat dissipation zone and a oxidation of radiating heating zone. The results have a good accordance with the actual observations value.
The Numerical Simulation Study of the Cone Hindered Settling Hydro-Sizer Based on CFD
Authors: Wang Fei Yue , Zhang Yi Shun , Shi Chang Liang , Liu Yuan Yang , Zhang Ling
Published: September 2013

This paper use CFD software for geometric modeling and structural mesh for the Cone Hindered Settling Hydro-sizer and then apply the Fluent software for three-dimensional CFD simulation. Using RNG K-ε two-equation turbulence model and Swirl Dominated Flow model respectively, and the top speed of different feeding liquid two-phase flow of water under medium CFD numerical simulation results grader internal flow field characteristics.
Experimental Research on the Stability of Airflow in Diagonal Network during Fire
Authors: Wang Wen Cai , Zhang Bo , Wei Wen Bin , Jiang Yu Hong , Li Ya Chen , Gong Wei Gang
Published: September 2013

In order to study the influence of tunnel fire on the airflow stability in diagonal network of single diagonal network ventilation, according to the principle of similitude air supply system of 4101 working face of Huhewusu was taken for research object. In a proportion of 1:20, simulation device for angle connection roadway was established. By means of this simulation device and the method of experimental simulation, change law of the air volume and wind direction of diagonal branch in single diagonal network was studied. The results showed that in a particular period of mine fire, air volume decreased in fire roadway and windage increased; air volume in diagonal branch decreased and with the process of fire the wind direction would change. After the change of wind direction, with the changing of fire scale the reverse air volume would show the same changing process.
Study on Flotation of Leaching Residue from Zinc Oxide Ore
Authors: Wang Shan , Wei Zhi Cong , Fang Jian Jun , Zhang Xiao Lin , Zhang Tie Min
Published: September 2013

Flotation behavior on ammonia leaching residue of alkaline zinc oxide ore from Lanping has been studied in traditional flotation, and the performance of bulk flotation showed that residue has a better floatability than raw ore when they are in the same process and same conditions, an operation recovery of lead and zinc can reach to 49.34% and 57.03% respectively in 3minutes. The followed verification test showed that phase recovery of zinc sulfide reach up to 76.5 in rough concentrates that from bulk flotation, the dissolution and activation affect of ammonia leaching residue is evidently.
The Absorption Energy and Equilibrium Structure Analysis of CH4 on Coal Molecules
Authors: Yang Hua Ping , Li Ming , Yan Zheng Xin , Yan Dong Zhi
Published: September 2013

The coal molecule model and the absorption model of coal and methane were established according to Van der Walls force. The coal molecule model and the absorption model of coal and methane were optimized and obtained absorption energy and equilibrium structure with the DFT method with 6-311G++ basic sets. The effects of coal molecule on the absorption position, absorption energy and absorption distance of CH4 were presented by analyzing the Mulliken atomic charges of coal molecules.
The Failure Mode Analysis of Open Pit Coal Mine Dump Slope Base on Fast Lagrangian Method
Authors: Wen He Xing , Xu Yan , Meng Xiang Tian
Published: September 2013

This paper research on the failure mode of a coal mine dump slope in Inner Mongolia. Firstly, there are some brief introductions of the surface mine dump slope failure mode and the basic principles of Lagrangian; Secondly, the collected geological data is shown. We established the dump slope model by FLAC3D program and than draw conclusions. This method can provide an useful safety information for the opencast coal mine.
Development of Ecological Landscape Campus: Planning and Construction of Nanshan Campus of Chongqing University of Education
Authors: Li Gui Jie , Feng Xia , Chen Qing Song , Zhao Xin
Published: September 2013

According to the fundamental theory and rational mode of ecological campus development, Nanshan campus of Chongqing University of Education (CQUE) was planned and constructed. The landscape structure mainly bases on the framework of one center, one axis, one circle and three veins; weaved in is the network of greenery, which is consisted of the core, gallery, band, gardens and spots of planting; meanwhile, the unique history and culture of CQUE are integrated into the landscape design. Consequently it is achieved of good ecological, economic and social benefits.
Experimental Study on Extraction of Scandium from Hydrochloride Acid Leaching Liquid in TBP
Authors: Zhang Gui Fang , Yan Peng , Yang Qing Rong
Published: September 2013

The scandium concentrate used in the leaching experiment was obtained from the rare earth ore containing scandium in Yunnan Province, the sample used in experiment is leaching liquid containing scandium which the content of scandium is 3.6g/t, with complex impurity composition. The main influencing factors of extraction in hydrochloric acid solution were acidity, mixing time, phase ratio etc. and the condition experiments about these factors were conducted. The results show that extraction of scandium from the hydrochloric acid solution in TBP is feasible. The optimal conditions are that pH of the solution is 1.26, dosage of TBP is 5% of the solution, dosage of kerosene is 10% of TBP, mixing time is 3 min, phase ratio is 1:10, washing time is 2, the oscillating time of stripping is 1~2 min and the stripping rate reach 99.89%.
Experimental Study of Gas Seepage Flow and Diffusion in Gobs
Authors: Ma Xiao Feng , Xiao Yang
Published: September 2013

Coal-rock mass in gobs is the porous medium mixed by the organic and inorganic. The motor process of the air flow obeys the rule of the unsteady-state flow, which is the substantial cause of the coal spontaneous combustion. The change law of the porous medium equation and the seepage coefficient was build. In addition, the discipline of the diffusion equation was obtained. It provides a reliable theoretical basis for coal spontaneous combustion prevention technology in gobs.