Owing to the safety consideration and improvement of lipase productivity, the genes of lipase and its cognate foldase from Pseudomonas aeruginosa CS-2 was co expressed in E.coli BL2 (DE3) and the optimization of expression condition was investigated in the paper. The recombinant strain entered the stationary...

Based on sample survey of 68 corporations in City D, this study analyzes corporate awareness, behavior, performance and policy needs of energy saving and pollution reduction in the "12th five-year" period, with the help of questionnaires and face to face interview. The empirical analysis of 68 corporations...

According to the basic idea of autonomous decentralized system, this paper divides the various units of off-grid DC micro-grid into different roles , and each roles are given specific control objectives and control strategy. In order to verify the effectiveness of the proposed off-grid DC micro-grid...

Ocean energy is a kind of clean and renewable energy source. In recent years, the development of ocean energy has become more and more important. With the development of ocean energy, our country has formulated some ocean energy policies. Similar to other areas of development, the ocean energy policy...

Dibenzothiophene and its derivatives are components of high-sulfur crude oil, and these sulfides would reduce the oil quality and increase sulfur dioxide emissions when burned, which will decline environmental quality. Compared with the traditional desulfurization method, biodesulfurization has many...

In order to study the effect of geological factors on the surface subsidence coefficient. Based on the analysis of all influential geological factors of subsidence coefficient and the typical mobile surface observation station data of China, the influence of each factor and the influence difference were...

In practical use, closed loop operation on distribution lines may generate large steady current and impact current. For multiple distribution lines, closed loop operations in turn with low load transfer efficiency are easy to lead black-out in large area. In order to increase efficiency without reducing...

Rhizoctonia is a soil-borne fungal pathogen which widely exists in the soil. This study, by comparing the two isolates of the AG-V which are new an stemsons group (AG)(Bs-J-06-7-1 and DL-YT-06-4-9), we find P absorption differences as well as their hyphae in the system P absorption rate interacting with...

A series of V2O5-CeO2/TiO2-SnO2 catalysts were prepared with different CeO2 content to investigate the effect of Ce modification for selective catalytic reduction of NO by NH3. The obtained samples were characterized by BET, XRD, HRTEM,H2-TPR and FT-IR. The catalytic test was also investigated on a fixed...

We use Monte-Carlo simulation method to investigate several factors influencing detection efficiency of neutron detector. We have simulated the effect of crystal materials (ZnS [1], LiI [2] and CaF2 [3]) on incident neutron flux and deposition energy. The result reveals that more energy deposited in...

Preparation of pearly green black pigment (micron glass/nano-Fe3O4) can be carried out by a green process: eroding the micron dimension glass first, then second co-precipitating ferrous and ferric ions on the eroded substrate, which should minimize long and short-term impacts on the environment. The...

The excessive consumption of fossil fuels brings air pollution problem in Beijing, and integration of Beijing-Tianjin-Hebei will join a new coordinating development for future development, it will form a symbiosis pattern. How to choose the symbiosis pattern is a key issue of the development. This paper...

For problems that there is common-mode voltage in non-isolation three-phase three-level V2G integration system, the common-mode equivalent model was established. Meanwhile, it revealed that DC link neutral-point potential imbalance would limit the effect of common-mode voltage suppression. The analysis...

Simplified reasonably and modeled large scale desulfurization tower, using the software to build a physical model, using ICEM software to divide the grid, using software fluent15 to simulate. Selected k-? model as calculating model, SIMPLE algorithm is used to calculate. Calculation results show that...

The experiment was carried out on the stability of heavy metals with the high concentration of heavy metal solution, which was prepared by absorbing bentonite and bentonite. The results show that after adding a certain amount of adsorption material in heavy metal solution, bentonite, concavo convex rod...

Based on the effect of variation of dissolved oxygen on the oxygen uptake rate (our), To study the effect of Cr6+ on the performance of activated sludge under different factors (concentration, MLSS, HRT, temperature, pH) by using activated sludge own activity. It has certain reference significance for...

The research object of electricity marketing is electricity consumption market. It is of great significance for judging the trend of its development and guiding the decision maker to analyze the prosperity of electricity consumption market. This paper put forward an entire system from disposal to filter...

Currently, the Periodic Test Surveillance has too much test items with different importance, and there is no different management requirement for the test items with different safety affect. The method described in this article can divided these test items in importance(mark A) and non-importance (mark...

Based on the special phase transition property of copolymer hydrogel of N-is opropylacrylamide, the immobilization of glucoamylase on five macro porous semi-interpenetrating stimuli-sensitive hydrogel carriers was studied. Four good preparations were screened, i.e. GelNIPAm/PAEMA-2.5, Gel NAEP/PAEMA-2.5,...

Influence of sand and dust weather on air pollution in Lanzhou is discussed by using the particulate matter monitoring data and the ground conventional meteorological observation data during 2001 to 2010. The results are shown as: ?Sand and dust weather in Lanzhou mainly happens in spring. It presents...

Energy service industry is an emerging industry which involved multi-subject, multi-product, multi-technology and multi-value, and is a complicated network system. This paper studies the energy services industry from the perspective of value network, analyzes the value network characteristics of each...

In order to study the influence of wind - hydro hybrid power plant on power grid, the paper represents the method of wind - hydro hybrid power plant, a simulation model combined wind turbine system, hybrid power system with electrical network, SVC, PSS and large hydro power plant was built by Matlab/Simulink....

As the rapid development of renewable energy, energy sectors have to increase the load transfer capacity of transmission line. In order to calculate the line ampacity accurately, it is necessary to establish a valid mathematical model for line AC resistance. However, the simplified AC resistance model,...

Energy and environmental problems have become the key factors restricting social development during the recent years. Therefore, in order to promote the process of social industrialization and build a saving-oriented society, it is imperative to increase the effort to develop energy-saving materials....