Based on preliminary studies to optimize the ultrasonic extraction of polysaccharides Coix chinensis Tod. conditions using orthogonal test method, the test results showed that: In order to obtain a higher extraction rate, optimization of process parameters for each factor A3B3C2D1, namely ultrasonic...

On the analysis of the electrochemical abrasive belt polishing technology, the main process parameters and equipments for the compressor crankshaft are selected; a set of finishing experiment plan is designed. The results show that the polishing process can reduce the surface roughness obviously, and...

Progress of studies in the mechanism of the membrane fouling of Membrane Bioreactor was introduced from aspects of membrane characteristics, the operating conditions and the properties of microorganisms the feedwater. The usual control strategies of the membrane fouling were summarized such as optimizing...

Paddy soil microbial community composition and functional diversity changes after a long-term fertilization were studied by BIOLOG. The results showed that the AWCD value eventually reached after a long-term fertilization was increased at some extent compared with the no fertilization. The diversity...

The supported heteropoly acid catalysts were prepared by loading Phosphotungstic acid on the MCM-41 molecular sieve via the impregnation method, which were characterized by FT-IR, N2 adsorption-desorption and applied in the synthesis of butyl lactate. The results show that heteropoly acids supported...

Groundwater is an important source of drinking water in the coastal areas of Hainan Island. In order to fully understand the condition of groundwater and impact of seawater intrusion, chemical data of logging groundwater in the northeast coast of Hainan Island, which was acquired by continuous sampling...

Mesoporous indium oxide has been successfully obtained by a simple nanocasting method. The characterization indicated that the powders havea good crystalline structure, and the synthesis was successfully controlled in nanoscale (meso-structure). The elcctrochemicalsensor based on mesoporousindium oxide...

On the premise of fixed slurry consistency and concentration of sodium silicate, adjust proportion design of fly ash content 8 groups, cement-sodium silicate double liquid grouting material experimental study and mixture ratio design, through the collation and analysis of experimental data, concluded...

On the premise of fixed cement slurry consistency and sodium silicate concentration, adjust the content of slag powder design 8 groups of ratio, cement and sodium silicate double liquid grouting material mix design and test research, through the collation and analysis of experimental data, obtained the...

Cuprous oxide (Cu2O)nanomaterial has been successfully obtained by a simple sol-gel technique. The characterization indicated that the powders have a good crystalline structure, and the synthesis was successfully controlled in nanoscale.Cyclic voltammetry (CV) revealed that Cu2O cubebox exhibited a direct...

According to the cement sulfate corrosion resistance properties of Portland cement mixed burning shale to determine the erosion test method, and analyzes the influence of different system of calcined shale sulphate corrosion resistance properties of Portland cement. The results show that: calcined shale...

In order to obtain the higher activity DS enzyme through genetic engineering technology. The point mutation method is used to get a higher activity recombinant DS enzyme from Corynebacterium glutamicum. At last the point 183 was mutated from L to Q in LG-322.The mutation type is a fundermental of construct...

The the tin and zinc enrichment in the Manjiazhai ore segment ore-bearing strata were studied in this paper, Exploration samples database for 3D model was designed. Variogram analysis show that the strata ore-controlling characteristic is significant. Tin is mainly enriched in the lower layers and zinc...

Total Alkaloids are important active materials of Actinidia arguta. However, no study has been conducted to explore the content determination method of the Actinidia arguta total alkaloid. An effective method was established in order to determine the total alkaloids from different parts of Actinidia...

To study on optimal conditions for extracting the higher content of total alkaloid from Actinidia arguta fruits, the effects of ethanol concentration, temperature, time and solid-liquid ratio on extraction efficiency total alkaloid were explored. The results showed that the optimum extraction conditions...

Manganese (Mn) is known to be essential for maintaining the proper function and regulation of many biochemical. To investigate the toxicity of Mn on bird brains, 50-day-old cocks were fed either a commercial diet or a Mn-supplemented diet. the following were determined: Mn concentration, Ca2+ concentration,...

To investigate the Manganese(Mn)-induced toxicity on crucial oxidative damage parameters on brain of birds, 50-day-old male Hyline cocks were fed either a commercial diet or a Mn-supplemented diet. The following were determined: restraining ability to OH•, the activities of Na+-K+-ATPase, Mg2+-ATPase...

The new kind of bio-based polyamide56 fiber has been synthesized by adipic acid and 1,5-pentanediamine, which was prepared by fermenting a variety of starch. The spin ability, physical and thermal properties of bio-based PA56, PA 6 and PA 66 were evaluated through systematic investigation and measurement....

A novel photoelectrochemical biosensor incorporating nanosized ZnO semiconductor crystals with enzyme to enhance photochemical reaction has been investigated. In this work, the ZnO nanoparticles and acetylcholinesterase (AChE) were immobilized on Pt electrode by chitosan (CHI) via layer-by-layer technique...

A novel tyrosinase (Tyr) biosensor based on liposome bioreactor and chitosan (CS) nano-composite has been developed for the detection of phenolic compounds. The encapsulation efficiency and drug loading content of the Tyr-loaded Liposome-based bioreactors were about 46.35± 0.85% and 41.15±0.95%, respectively....

The interaction among Lanthanum, Arsenic and Iron at high temperature in a pressure-tight reactor machined by H08 steel were studied by means of electron probe microanalysis, optical microscopy and X-ray diffraction to understand what compounds could be developed on the condition that the atomic ratio...

Properties of the products derived from the reaction of 6-aminopenicillanic acid (6-APA) with varying number of H+ have been researched by B3LYP method of the Density Function Theory (DFT) on the basis of 6-31G* sets. It is found that the products are all unstable, and easily open their beta lactam rings....

This investigation was undertaken to evaluate a new kind of polycarboxylate superplasticizer .Used polyoxyethylene ether (TPEG), acrylic acid (AA) functional monomer (A)and as the monomer, hydrogen peroxide (H2O2) as initiator, Vitamin C (Vc)as reducing agent, TGA as chain transfer agent, synthesised...

In order to study the effect of the temperature of reaction system on the properties of polycarboxylate-based superplasticizers (PC) and on the cement workability, the PC are synthesized in different initiatory temperature from 10 to 40 . Fourier transform infrared spectroscopy (FTIR), and gel permeation...

In this work, we synthesized a new viscosity modifying agents with AA, AM as monomer and ammonium persulfate as initiator. Through the discussion on the AA dosage, the polymerization conditions, we determined the optimum technological conditions of the new VMA: the optimum molar ratio of AA to AM is...

Under the condition of unchangeable reaction time, the dosage of initiator and chain transfer agent, the molar volume of unsaturated double bond, we synthesized a series of polycarboxylate superplasticizer via free radical polymerization. These polycarboxylate superplasticizer had a similar structure...

The effect of three typical commercial clays (Na-MMT, Illite and Kaolin) upon the dispersion of polycarboxylate (PCE) was investigated by mini slump test and viscosity analysis. PCE adsorption on clays or cement was determined by method of total organic carbon. Mini slump test results showed adding more...

Air-entraining agents have been regarded as essential for the workability of concrete since the 1930s, the uniform, stable tiny bubbles in concrete can improve the workability of concrete, reduce segregation and bleeding in fresh concrete, improve freeze-thaw durability and increase pump-ability of fresh...

The shortcoming of polycarboxylate superplasticizer could delay the early strength of concrete, this limit its use in winter. In order to satisfy the application of polycarboxylate superplasticizer in the early strength constructional buildings. TEA was introduced into molecular chain of polycarboxylate...

Amide-modified polycarboxylate superplasticizer (PCE) has shown many advantages compared with conventional polycarboxylate superplasticizer due to its unique molecular structure. In this study, we introduced three types of clay, montmorillonite, kaolinite and muscovite into cement and their influence...

The effect of ferrous ions on the molecular weight and molecular weight distribution of PCE is investigated by Gel permeation chromatography (GPC). The effect of ferrous ions on the dispersion properties of PCE is measured by the fluidity of cement pastes. The results indicate that ferrous sulfate adopted...

Through analyzing and testing the microstructure and chemical component of the samples after laser remelting, the influence of laser remelting on K423A nickel-base superalloy were studied. The results showed that, laser remelting had a significant influence on surface topography of K423A nickel-base...

Possible solutions of this problem and environmental security are considered in this article, solutions are based on a scientific study on recovery and recycling of oily waste. The method of oil extraction in the purification of oil-containing wastes using solar energy is worked out, given method based...

Cu and Sr ions doped hydroxyapatite (Ca10(PO4)6(OH)2, HA) whiskers were synthesized by hydrothermal homogeneous precipitation method. The morphology, structure and the phase composites of the products were characterized by XRD, FTIR and SEM. The results showed that Cu2+ or Sr2+ partially substituted...

Effects of phosphate bioglass on sintering of hydroxyapatite (Ca10(PO4)6(OH)2,HA) scaffolds prepared by freeze-drying casting was studied. The phosphate bioglass, acted as a binder, was added in a mixture of HA powders and forming additives. The result shows that the phosphate bioglass binder could improve...

Analysis of turbulence on the naphthenic acid corrosion specimens under scouring of 90m/s high flow rate fluid by Fluent indicated that maximum turbulence existed at the center of specimen, the turbulence in other zones decreased nonlinearly with the distance from the center. The average corrosion rate...

The turbulence and flow rate around the specimens were analyzed by Fluent and results indicated that specimens installed in the pipeline varied the fluid flow direction, highly increased the flow rate nearby and formed strong turbulence around the specimens, the max turbulence in work areas could reach...

Fluent6.2 was used to analog the turbulence and flow rate around the specimens installed in the pipeline and results indicated that the specimens varied the fluid flow direction and increased flow rate of fluid from 20m s-1 to 50m s-1, strong turbulence was formed around the specimens and the max turbulence...

In the chemical industry, chemical machinery is essential production equipment, the corrosion problems of the chemical equipment will bring negative economic problems to the enterprises. In order to improve the anticorrosion ability of chemical machiery, the types of corrosion were introduced, the principle...

Theoretical studies on the broadband operating mode of anisotropic acousto-optic deflector (AOD) using tellurium dioxide crystal are carried out, the operating properties of the bandwidth and the central frequency of the AOD are systematically studied by solving the Dixon equation that characterizes...

Bacterial infection is one of the most common problems after orthopedic implant surgery. If not prevented, bacterial infection can result in serious and life threatening conditions such as osteomyelitis. Thus, in order to reduce chances of such serious complication, patients are often subjected to antibiotic...

The interfacial and electrical properties of the multilayer TiON/TaON/InGaAs and TaON/TiON/InGaAs metal-oxide-semiconductor (MOS) capacitors fabricated by alternately RF-sputtering method are investigated and compared. Experimental results show that the former exhibits lower interface-state density,...

Through the study on technological mineralogy of anshan type lean hematite ore, proved the stope in the southern district of ore minerals in the ore is mainly hematite, limonite, magnetite, hematite, siderite images, accounts for some 40% of the content of rock,the gangue minerals are mainly quartz,...

The application of molybdenum was limited as a candidate material for working at a high temperature because molybdenum has a poor oxidation resistance. MoSi2 is typically selected to solve the problem since it can form a dense SiO2 coating to protect the substrate molybdenum. MoSi2 coating on the surface...

The verification certified reference material about thermal conductivity detector (TCD) of gas chromatograph was studied and the preparation was introduced. This article in detail introduced uniformity, stability assessment of certified reference material and analyzed the uncertainty evaluation. The...

The interactions of chlorotetracycline (CTC) and enoxacin (ENX) with human serum albumin (HSA) had been studied by molecular modeling method. Molecular docking revealed that both CTC and ENX bound to site I (subdomain IIA) of HSA through multiple interactions, such as hydrogen bonds, hydrophobic effect...

For the aim that implement the visualization of plant villus vividly and effectively, do much work on the research of villus outward appearance, then put forward a method to simulate villus on computer, the method adopt segment to construct a single villus, and then, with the addition of parameters such...

The hydrolysis reaction of methyl ethyl ketone azine and the simulation of process are studied. The influence factors such as the plate number, the feed location, water and methyl ethyl ketone azine molar ratio and reflux ratio are studied respectively. The feeding method is single strand, reaction section...

In this paper, the separation process of ethylenediamine-water azeotropic mixture is investigated with Aspen Plus software. The sim- ulation results show that the extractive disti- llation column includes 26 theoretical plates, the D/F of azeotropic distillation column is 0.18, the feed location of azeotropic...

A new method for modeling shrinkage of a biomass particle is presented with the unreacted-core-shrinking model and shrinking core model for coal combustion. 2D model of biomass pyrolysis in a moving bed was established. The simulation was carried out with open source code MFIX by using Eulerian-Eulerian...

According to the first-principle based on density functional theory, the stability of the solid solutions of Au-Pd-M (M=Mo,Y,Zr) alloy systems were calculated. The results show that, adding the same percentage content, 1% Mo doped in Au-Pd solid solution is the most stable phase structure. When doped...

Rift valley fever(RVF) and peste des petits ruminants(PPR) are both highly contagious diseases of ruminants caused by RVF virus (RVFV) and PPR virus (PPRV), which are both the notifiable multiple species diseases in the OIE list. In order to establish a rapid method for detecting of RVF and PPR, two...

Concentrations of black carbon (BC) were determined in the sediments from the main stream and the tributary of the Changjiang River with CTO-375 method. Meanwhile, the total organic carbon (TOC) contents, grain size of sediments were also measured. BC contents ranged from 0.22 to 1.89 mg/g, which was...

Concentrations of polycyclic aromatic hydrocarbons (PAHs) were determined in the sediments from the main stream and the tributary of the Changjiang River. PAHs contents in the sediments from the Changjiang River ranged from 10.31 ng/g to 1239 ng/g, which were most likely related to human activities....

Graphene is a kind of two dimensional material. Great attentions have been paid on graphene based components due to its perfect and mysterious electronic characteristics. Flexible supported graphene field effective transistor (GFET) were prepared, solution gated by an Ag/AgCl reference electrode in the...

In the process of we studied chromosome modifications, we found the previous studies only focused on linear relationship between chemical modifications. So we interfered the data sets of the Yeast histone Methylation modification and Acetylation which are measured by Pothook et al. We got 16 kinds of...

Extraction salidroside with the aqueous two-phase system. Through several single-factor tests: Polyethylene glycol (PEG) molecular weight, the mass fraction of PEG, the kinds of salt, the salt mass fraction and ionic strength. Get changes Salidroside extraction rate. And, obtain the optimum conditions...

Using aqueous two-phase to extract alkaloids in coptis chinensis. By changing the aqueous two-phase systems (molecular weight and concentration of polyethylene glycol (PEG), kinds and concentration of salt), and researched the distribution behavior of four major alkaloids in rhizoma coptidis: berberine,...

A low frequency living beings electrotherapy instrument is designed which is based on the transcutaneous electrical nerve stimulation. This system uses ATmega32 (MCU) to control its output and display. The hardware part includes the keyboard, the LCD, the alarm circuit and output circuit .The other part...

Jiangling depression found in oil exploration in its deep Tertiary volcanic rocks containing potassium-rich brine, unusually high grade potassium, potash is an important resource. Potassium-rich volcanic important reservoir brine, and depression has a wide distribution in the volcanic area of great thickness,...

For the problems of the collophane backwater in the production process, experimental study on the phosphate backwater in Yunnan has been carried. It examined the effect of main ions on the flotation backwater. It found that it will deteriorate collophane flotation index when the content of Ca2+, Mg2+,...

The Northern Yinchuan Plain is a productive agricultural area of northwest China, which is under threat due to soil salinization. According to the formation and restoring history of soil salinization, the analytic hierarchy process (AHP) was adopted for analyzing the causes of soil salinization and efficiency...

This study mainly focused on the dehydration of xylose to furfural with green catalysis. The reaction was under atmospheric pressure, with the as the catalyst plus an inorganic salt (NaCl) as promoter. DMSO was used as a renewable extraction solvent in a biphasic system. The optimal catalytic reaction...

This paper utilizes the conductivity method, critical pH method and turbidity measurement to select RO scale inhibitors. Six kinds of RO scale inhibitors both at home and abroad are used to explore feasibility of the three methods. The results show that, all of them can be the rapid screening methods...

The degradation and flocculation of tetracycline (TC) with nanoscale zerovalent iron (NZVI) modified by starch were investigated using batch experiments as a function of reactant concentration, pH, and ion strength. The 500 mg/L TC was processed with 0.20 mg/L NZVI, the adsorption and degradation effect...

The reservoir of Late Cretaceous Yaojia-Nengjiang Formation in Songliao Basin was a large-scale delta complex formed in the transgression and regression period, which had the characteristics of sand body in distributary channel, mouth bar and sheet sand. The sand bodies extended to the lacustrine center...

In order to optimize the application of biodiesel for diesel engines, the low-temperature fluidity, pulverization and evaporation, erosion capability and invariability of diesel and fatty acid methyl ester (FAME) were compared and analyzed. The cold filter plugging point, solidifying point, distillation...

Composite emulsion coating with polyaniline and core-shell fluorine-containing polyacrylate emulsion (PANI/ FPAc) was prepared for protecting Q235 steel in this paper. The structure of PANI emulsion particles and core-shell FPAc emulsion particles was observed by transmission electron microscope (TEM)....

Potassium channels are one of the most complex and wide-distributed channels in neurons, which have concentrated more and more attention, because it is an important signal pathway in the neuronal apoptosis and pathogenesis of Alzheimer's disease and neuron apoptosis. In this study whole-cell electrophysiological...

Intercalated and exfoliated montmorillonite/amidoximated polyacrylonitrile (IAPAN/Mont and EAPAN/Mont) were prepared by using in situ polymerization technique. Intercalated Mont/APAN was obtained through polymerization with organ-montmorillonite and acrylonitrile. However, it became exfoliated when using...

This paper describes an approach to identify the influence of different stress type on hydrogen diffusion of the specimen which contains both tensile stress and pressure stress. The numerical method of simulating hydrogen diffusion by using software Abaqus is used to determine the influence. The simulated...

Serious blisters were found on the shell surface of the gas tank which operated in wet H2S environment during a regular inspection. Gas sampling device was used to determine that the gas in the blister is hydrogen. The causes of blisters were analyzed and investigated by means of chemical analysis, metallographic...

Poly (2-aminothiazole) was synthesized by chemical oxidative polymerization of 2-aminothiazole, through selecting the appropriate reaction medium and simply modulating reaction parameters such as reaction time, temperature and oxidant concentrations, the chemical structure, product yield and the thermal...

In this paper, we present a hybrid bacterial foraging optimization (HBFO) by combining the time-varying chemotaxis step strategies with dynamic topology structure. Specifically, we adopt four kinds of time-varying chemotaxis step methods which use the dynamic topology structure to improve convergence...

Traditional SCR control methods can't fit the high efficiency SCR and keep the coherence of production. Model-based SCR control methods is developed to compensate the defect. A simulation model for a Cu-zeolite SCR catalyst has been developed. The model is capable of predicting the conversion of NOX,...

Silicon carbide (SiC) is a kind of material with high specific stiffness, thermal conductivity and low thermal deformation coefficient, which is currently in active demand in aeronautic and astronautic industries. However, the beneficial properties of high hardness and high strength cause problems in...

N-nitrosamines (NAs) are harmful substances which have been detected in meat products. In this study, four NAs namely nnitrosodimethylamine (NDMA), n-nituosomethylethylamine (NMEA), n-nitrosodiethylamine (NDEA) and n-nitrosopoperdine (NPIP) was determined in the process of Chinese preserved meat. GC-MS...

Atomistic modelling and simulations are becoming increasingly important in the field of corrosion inhibition. In this work, Monte Carlo simulations technique incorporating molecular mechanics and molecular dynamics was used to simulate the adsorption of two Schiff base derivatives, namely 4-(4-aminostyryl)-N,N-dimethyl...

By means of magneto hydrodynamic modelling based on magnetic vector potential and UDF programming, a numerical simulation is conducted for the heat transfer and flow process in the free-burning arc, which enables the coupling calculation of flow field and electromagnetic field. In consideration of the...

The influence of spray casting technique on martensitic transformation temperature, magnetic properties and compressive properties of Ni50Mn25+xGa25–x (x = 0, 1.25, 2.5, 3.75 and 5) alloys was investigated. With the increase in Mn content, martensitic transformation temperature of the spray casting samples...

Several SO3H-functionalized acidic ionic liquids (ILs) were synthesized by two-step method, using 1, 3-propane sulfone and 1, 4-Butanesultone as raw materials, respectively. It is noteworthy that the ionic liquid using 2-ethyl-4-methylimidazole as source has not been reported. Esterification of 1-butanol...

Chloride and freeze-thaw cycles are two main factors which cause deterioration of reinforced concrete (RC) structure in the cold regions. In this paper, the process of chloride ingress into concrete exposed to freeze-thaw cycles is experimentally researched. From the experimental results, it appears...

The paper introduces the basic structure, physical and chemical property as well as the own defects of epoxy(EP), making a summary of main ways of improving EP. By analyzing the advantages and disadvantages of the mechanism and technological approaches which organic silicone, nano particles and polyurethane...

Interface debonding is one of the most commonly observed failure in the Solid Rocket Motor(SRM). In order to investigate the debonding properties, the experiment was conducted by using double cantilever beam(DCB) specimen, and the strain energy release rate was obtained based on the load-displacement...

In this paper, based on the chemo-thermo-poroelasticity model of saturated porous medium undergoing the local thermal non-equilibrium (LTNE) conditions, the pore pressure and chemo-thermal stresses around a spherical cavity in an infinite fluid saturated porous medium subjected to sudden variations for...

SWCNTs are widely used in the fields of biomedicine, electronics and energy storage. With the increasing of SWCNTs production, SWCNTs are likely to present in the environment. In this work, a series of concentrations of SWCNTs were used to test the toxicity to human epithelial cells (A549). Results showed...

CTA-based membranes for forward osmosis (FO) were prepared by immersion precipitation. Casting composition and coagulation conditions—solvent/acetone ratio, temperature, evaporation time of coagulation bath—were optimized to obtain membranes with best performance. Membranes were characterized by various...

In this paper, the static and dynamic performance of balance model foam concentrate mix equipment and establish mathematic model of this machine, and analyze by using AMESIM simulation software. According to the national standard foam extinguishing system and parts general technical conditions to relevant...

In this paper, a CFD-based release model is presented to study the release process of alkali metal and predict the deposition in the furnace. In the release model, potassium chloride (KCl) is chosen as a representative alkali. The results showed that: the concentration of KCl, mainly releases in devolatilization...

China depends heavily on coal to meet its electricity and economic development needs for a long time and it has surpassed America and became the biggest greenhouse gases emission country in the world.The appearance of biomass energy power generation has been easing the tension of domestic energy and...

This paper used parallel test of single factor to investigate preparation method, the excipient, the water-soluble filler, the wetting agent and the drug loading for Pulsatilla Chinensis (Bunge) Regel total saponins-hydroxypropyl- -cyclodextrin inclusion compound pellets. The results showed that the...

This paper used parallel test of single factor to investigate feed ratio of inclusion compound, drying method, the volatilization temperature of ethanol for Pulsatilla Chinensis (Bunge) Regel total saponins-HP- -CD inclusion compound. The results showed that the best preparation process of inclusion...

Ozone pre-oxidation removal of MC-LR better, under the condition of pH4,ozone for MC-LR removal of 76.22%,than the original water removal increased by about 11%.With the increasing value of pH, ozone for MC-LR removal decreased, but higher pH beneficial ozone removal of turbidity, UV254, TOC and CODMn....

With the rapid development of our country's economy, modern society has entered the information age. Computer technology, communication technology and the development of computer network technology, automated information processing ability and level enhances unceasingly, information technology in all...

Coal quality detection is used to measure moisture in coal, ash content, volatile and quality percentage content of solid carbon, is an important way to understand the characteristics of coal, is also a fundamental basis of evaluation of coal quality. Coal quality analyzer is an important instrument...

In this paper, the blocked waterborne polyurethane crosslinker were prepared by polyaddition reaction with isophorone diisocyanate (IPDI), polypropylene glycol-2000 (PPG MW2000) and dimethylolpropionic acid (DMPA) as internal emulsifier, sodium bisulfite (NaHSO3) as blocked agent in presence of dibutyltin...

The process for the synthesis of flyash-based superfine zeolites-Y (FAZ) were presented, which basically included the alkaline fusion treatment of fly ash (FA), the gels formation by dissolved and aged, following hydrothermal crystallization. A detailed investigation was carried out to determine the...

The optimization of activator used in SnBi lead-free solder paste were carried out by welding experiments with the spreadability and the spot morphology as the main comment indexes.And the properties of the composite activator which was mixed by two activator possessing good performances were studied....

This paper prepared MoS2 water-based and oil-based nanofluids with different mass fractions by two step method, and investigated their stability, thermal conductivity, and surface tension. The thermal conductivity of MoS2 oil-based nanofluids was calculated using the classic model, and compared with...

A procedure for solid-phase microextraction fiber preparation was introduced, which combined a quartz fiber substrate with a blend of SiO2 sol–gel and PVA, as a way of increasing both the adhesive ability and the extracting capability of fibers. Double cross-linked network of organic and inorganic layer...

A set of onshore ballast water treatment equipment utilizing micro-pore ceramic filtration (MPCF) and UV radiation (MPCF&UV) system was designed and set up with a maximum flow rate of 80 m3•h 1. Technical feasibilities of MPCF&UV system were evaluated in three areas: removal efficiencies of indicator...

Conducted a series of experiments of upsetting of steel samples. Theoretically developed and experimentally verified a fundamentally new way to control the properties of the processed metal by changing the rigidity factor of the system processed material - deforming tool.

First principles calculations were performed to explain the deformation feature and band gap variation behavior of PbTe under isotropic and uniaxial strain along [100], [110] and [111] directions. Calculations showed that the band gap variation regularity is quite different between the first and the...

On the basis of the study of the synthetic technology of sulfonated acetone formaldehyde polycondensate, the paper analyzes the polycondensate’s synthetic mechanism and advances the three-stage formaldehyde additive technology.

To confirm the role and mechanism of gefitinib used as a new stent coating material on inhibition of smooth muscle cell proliferation, MTT assay was used to measure the cell proliferation and Western Blot was used to determine the expression of Caspase-3 and Bcl-2. Experiments showed that, compared with...

We report on the visible-light responsive Bi-doped In2O3 nanospheres, which were synthesized via a simple solvothermal reaction between Bi(NO3)3•5H2O and In(NO3)3•4.5H2O in the presence of absolute ethanol and ethylene glycol by adding urea and annealing it at 400 0C. The effects of experimental parameters...

The bioactivity of titanium treated with boiling diluted alkali process was evaluated by immersing the specimens into a supersaturated calcification solution (SCS). Biomimetic bone-like apatite with typical characteristics of low crystallinity and lower Ca/P atomic ratio ranging from 1.33 to 1.45 was...

The conversion of progesterone (1) by Aspergillus sp. was studied. The major metabolites formed from progesterone were identi ed as 11 -hydroxyl progesterone (2), 15 -hydroxyl progesterone (3), 15 -hydroxypreg-1,4-dien-3,20-dione (4), 6 ,11 -dihydroxypregesterone (5).Conversion products were characterized...

According to the new standard of China, the effect of water binder ratio and the strength grade and mineral mixture on the resistance of concrete to sulphate attack was studied. The results of the study show that, reducing water binder ratio to enhance the strength of concrete can improve the resistance...

The thermo-oxidative degradation behavior of the B-PF was studied using thermal gravimetry analysis (TGA-DTG) method. Compared with the unmodified resin (PF), the temperature at the maximum decomposing rate of the B-PF resin increases by 54 and its oxidative residues yield at 1000 enhances by 17.99 percent....

Fe3O4 nanoparticles with tunable size and shape were synthesized by high-temperature organic solution method. The size and shape of nanoparticles can be tuned by varying the ratio of surfactant to precursor and refluxing temperature. Large surfactant : precursor ratio resulted in cubic shape, while small...

Chemically mixed Mn1-xCoxFe2O4 nanoparticles with the size about 8 nm were synthesized by thermal decomposition method. The content of Co element x varied from 0.02 to 0.08. Magnetic measurement indicated that 8 nm Mn1-xCoxFe2O4 nanoparticles were superparamagnetic at room temperature and ferromagnetic...

Biological immobilized technology is considered a potential instrument for the removal of heavy metals from waste solutions and for precious heavy metals recovery, an alternative to the conventional processes, such as those based on ion exchange, or adsorption on activated carbon. In this work the state...

This paper analyzed the vertical distribution and sedimentation of volatile phenols in bottom waters in Jiaozhou Bay in 1982. Results showed that the pollution level of volatile phenols in bottom waters in Jiaozhou Bay was very low in 1982, which were increasing from spring, and then reaching the peak...