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Environmental pollution is closely linked to the occurrence and development of cancer. Chemical carcinogens are the most important environmental factors causing cancer in humans. Among them, persistent organic pollutants (POPs) are characterized by their widespread distribution, persistence, and bioaccumulation. Research on the carcinogenic effects of POPs has received considerable attention in recent years. This article reviewed the internal exposure, association with cancer risk, and potential carcinogenic mechanisms of five typical classes of POPs in the environment, including polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), per- and poly-fluoroalkyl substances (PFAS), brominated flame retardants (BFRs), and short-chain chlorinated paraffins (SCCPs). These five types of POPs have distinct carcinogenic mechanisms, including interfering with cell proliferation cycle, altering epigenetic inheritance, promoting oxidative stress, altering energy metabolism, and affecting immune function. The development of cancer is the result of interaction between intrinsic genetic factors and external environmental factors. In addition to focusing on how environmental POPs affect the genetic material of organisms, it is also important to consider their effects on the tumor microenvironment, including tumor immunity and angiogenesis. Understanding these effects is crucial for guiding future efforts in pollution control and precision medicine in cancer treatment.

Background and objective The relationship between quality of life at three months after lung cancer surgery and different surgical approaches is remains unclear. This study aimed to compare the quality of life of patients three months after uniportal and multiportal thoracoscopic lobectomy. Methods Data from patients who underwent lung surgery at the Department of Thoracic Surgery, Sichuan Cancer Hospital between April 2021 and October 2021 were collected. The European Organization for Research and Treatment of Quality of Life Questionnaire-Core 30 (EORTC QLQ-C30) and Quality of Life Questionnaire-Lung Cancer 29 (EORTC QLQ-LC29) were used to collect quality of life data of the patients. Potential confounding factors in the baseline data were included in a multivariate regression model for adjustment, and the quality of life of the two groups three months postoperatively was compared with traditional clinical outcomes. Results A total of 130 lung cancer patients were included, with 57 males (43.8%) and 73 females (56.2%), and an average age of (57.1±9.5) yr. In the baseline data of the two groups, there was a statistical difference in the number of chest drainage tubes placed (P0.05). The multiportal group had longer surgery time (120.0 min vs 85.0 min, P=0.001), postoperative hospital stay (6.0 d vs 4.0 d, P=0.020), and a higher incidence of early ≥ grade 2 complications (39.0% vs 10.1%, P=0.011) compared to the uniportal group. Conclusion Patients undergoing uniportal and multiportal thoracoscopic lobectomy have similar quality of life at three months postoperatively. The uniportal group may have certain advantages in terms of traditional clinical outcome indicators such as operation time, postoperative hospital stay, and early postoperative complications.

There are numerous issues in the mainstream process of alkali decomposition of tungsten ores, such as large water consumption, large amounts of wastewater, and high processing costs, which add the dual pressure of economic and environmental protection on smelting enterprises and prevent them from meeting the industry’s development needs. As a result of a series of studies on scheelite roasting and decomposition processes, our team innovatively proposed the use of acid roasting to develop the process of sulfate decomposition of scheelite so that CaWO4 in the scheelite could be transformed directly into WO3. In addition to WO3, the roasting products contained soluble Na2SO4 and insoluble CaSO4. Because CaSO4 can be dissolved in hydrochloric acid, it can be separated from WO3 via hydrochloric acid leaching to further enrich WO3, resulting in a higher-grade material for subsequent procedures. In the presence of Na2SO4, its effect on the dissolution of WO3 or CaSO4 in hydrochloric acid will directly determine the separation effect of calcium and tungsten in the roasting products. Thus, using pure substances such as WO3, CaSO4, and Na2SO4 as raw materials, the dissolution behaviors of WO3, CaSO4, and WO3–CaSO4 in HCl–Na2SO4 solution were investigated separately via isothermal equilibrium dissolution to investigate the effects of hydrochloric acid concentration, sodium sulfate concentration, dissolution time, and dissolution temperature on the solubility of WO3, CaSO4, and WO3–CasO4 in HCl–Na2SO4 solution. The analysis shows that WO3 and CaSO4 have very different solubilities in hydrochloric acid. The solubility of CaSO4 in hydrochloric acid increases with temperature and hydrochloric acid concentration when the dissolution time is 0.5–2.5 h, the hydrochloric acid concentration is 1–5 mol·L−1, the molar ratio of HCl and Na2SO4 is 1∶2–2∶1, and the dissolution temperature is 40–80 ℃. The solubility of calcium sulfate in hydrochloric acid increases with the increase in temperature and hydrochloric acid concentration. When the temperature is 80 ℃ and the concentration of hydrochloric acid is 3 mol·L−1, the solubility of calcium sulfate in hydrochloric acid reaches a peak of 55 g·L−1. Due to the same ion effect, Na2SO4 can significantly reduce the solubility of CaSO4 and narrow the solubility difference between CaSO4 and WO3 in hydrochloric acid. CaSO4 has the highest solubility in HCl–Na2SO4 solution at 17.04 g·L−1. The dissolved WO3, whose solubility is maintained at 0.3–3 g·L−1, can be effectively recovered by using the current mature low-tungsten recovery process. Therefore, when CaSO4 and WO3 coexist in hydrochloric acid, increasing the concentration of hydrochloric acid and the dissolution temperature while decreasing the concentration of Na2SO4 can increase the solubility difference between them and achieve separation.

ObjectivesIn order to provide the basis for accurate control of diesel engine fuel injection quantity, a method was proposed to establish the main injection quantity prediction model with input parameters as dwell time, common rail pressure and main injection pulse width for the pre-main injection mode.MethodsAMESim simulation model was used to conduct simulation experiments and then collect data. Based on the data, the relationship between the dwell time and the main injection volume under single working condition was obtained. On this basis, the influence of common rail pressure and main injection pulse width on the model coefficient was introduced to build a complete multi-working condition main injection quantity prediction model. Multiple input parameter combinations were used to verify the accuracy and reliability of the prediction model of main injection quantity fluctuation.ResultsThe results show that the root-mean-square error (RMSE) of the scheme of multi-working condition main injection quantity prediction model is 1.443 mm3. It can reduce the experiment amount required for modeling from n3 orders of magnitude to n2 orders of magnitude.ConclusionsThe proposed prediction model has sufficient accuracy, which is of great significance for engineering application of model-based fuel injection control.

Primary pulmonary non-Hodgkin’s lymphoma (PPNHL) is a kind of malignant lymphoma originated from lymphoid tissue of the lung. PPNHL is a rare type in extra nodal lymphoma. In this article, we reported one case of 57-year-old woman with PPNHL, whose clinical characteristics, radiological features, diagnosis and treatment was described and related literatures were reviewed.

The experiment was used fermentation bed technology to study the effect of fermentation bed on diarrhea rate, growth performance and blood physicochemical indexes of lambs in winter. Three batches of experiments were carried out in a row, and 30 hybrid ewes who had just given birth and gave birth to two lambs in each batch were randomly assigned to two closed houses with windows and the same building structure, one floor was transformed into a fermentation bed (experimental group), and the other was used as a control group. The lambs were fed in a single pen for 7 d and then transferred out. Each group was randomly divided into three pens, transferred to semi-open houses, and continued to be fed until weaning at 60 d. The results showed that on 1~7 d, the diarrhea rate of lambs in experimental group was significantly lower than that in control group (P<0.05). From birth to weaning, the diarrhea rate and mortality of lambs in experimental group were decreased by 2.49% and 2.95% compared with control group (P<0.05). On 7 d of experiment, the body height, body length and chest circumference of lambs in experimental group were increased by 1.71, 0.56, 0.66 cm compared with control group, respectively (P<0.05). On 8~30 d, the average daily gain of lambs in experimental group was increased by 22.59% compared with control group ( P<0.05). The average daily gain of experimental group was significantly higher than that of control group during the whole experiment period (1~60 d) (P<0.05). At 60 d of age, the body weight of lambs in experimental group was increased by 13.42% compared with control group ( P<0.05). The percentage of lymphocyte in whole blood of lambs in experimental group was significantly higher than that in control group (P<0.05), and the content of GLU, TP and GLB in serum were increased by 8.45%, 3.34% and 10.49% compared with control group, respectively (P<0.05). The study indicates that using a fermentation bed feeding mode within 7 d of birth can reduce the rate of diarrhea and mortality before weaning, and improve the apparent digestibility and blood physicochemical indicators of lambs. [ABSTRACT FROM AUTHOR]

The German cockroach, Blattella germanica (L.), transmits a variety of pathogens and synthesizes nearly ten protein substances that trigger human allergies and asthma. With its strong fecundity and super resistance to various kinds of chemical pesticides, B. germanica is currently regarded as the most difficult to control global, household, insect pest. B. germanica uses sex pheromones for communication between the sexes. These pheromones are synthesized by sexually mature adult females. Their main function is to attract and stimulate male courtship and induce mating. Sex pheromone biosynthesis is therefore one of the core steps of sexual communication in this species. Articles on the regulation of sex pheromone synthesis in B. germanica have gradually increased in recent years, however, there has so far been no critical review summarizing progress and prospects for future research. This paper reviews important progress in research on contact sex pheromone biosynthesis and molecular regulation in B. germanica over the past three decades. It introduces researches on chemical composition and biosynthetic sites, focuses on the identification and characterization of key enzymatic genes involved in the sex pheromone biosynthesis pathway and the regulation of sex pheromone synthesis by the coordination between sex differentiation and juvenile hormone signaling. Prospects for future research are outlined with the aim of providing new theoretical support to develop new strategies for regulating cockroach behavior and new cockroach baits. [ABSTRACT FROM AUTHOR]

In order to study the flow field distribution of the hollow fiber column membrane module, a three -dimensional porous media model based on a single membrane filament was established, and the control equation was solved by the Fluent finite volume method, and the distribution of gas and liquid phases under the mixed model in the module was obtained. Studies have shown that due to the filtration resistance on the surface of the porous medium membrane filaments, the fluid flow rate in the membrane module was continuously reduced along the radial gradient, and the flow rate was relatively large at the outlet due to the influence of the flow direction of the module wall. There was no big difference between 0.30 m/s and 0.15 m/s gas phase velocity, and the membrane filament surface gas velocity at 0.30 m/s was larger than that at 0.10 m/s. The shear stress generated by the bubble group was strong, which was conducive to the cleaning of the membrane surface contamination in the later stage; Compared with the liquid phase velocity of 0.30 m/s, 0.10 m/s and 0.20 m/s, the membrane filament at the entrance end were stressed and the fluid flow rate was large. The velocity drops relatively slowly after the membrane filtration resistance, and the membrane flux was relatively ideal [ABSTRACT FROM AUTHOR]

A bacterial strain was isolated from the lungs of weaned pigs in the infected intensive pig farm in Fujian Province. According to the morphological observation, biochemical test, cultural characteristics, PCR identification and animal challenge test of the isolated bacteria, and combined with the clinical symptoms and pathological changes of the infected pigs, it was indicated that the isolated bacteria was partial to anaerobic Streptococcus, which had the characteristics of good culture on blood plate and could cause the disease and death of mice. The drug sensitivity test showed that the isolated Streptococcus was highly sensitive to vancomycin, imipenem, linezolid and rocephin, and was moderately sensitive to amoxicillin, florfenicol, cefotaxime, macrodantin and tigecycline, while was not sensitive to the drugs such as cardoxycycline, polymyxin, penicillin, streptomycin, and enrofloxacin. According to the results of drug sensitivity, the pig farm should take emergency prevention and control measures, and the epidemic could be effectively controlled 5 days later. [ABSTRACT FROM AUTHOR]

Countryside is an important field to preserve Wushu tradition and to continue Wushu culture bases. The inheritance strategy of rural Wushu inheritors shows the prominent characteristics of "emotion standard": (1) based on the local ethics, winning the support of the rural people with the care of the rural people; (2) adjusting the social relations with human feelings to obtain the external support for the development of rural Wushu; (3) forming a strong moral force of Wushu culture inheritance with Wushu bearings. In contrast to the hypothesis of "economic man" in economy, the social action of rural Wushu inheritors follows the hypothesis of "cultural man", creating a "meaning structure" which is maintained by feelings and continues rural Wushu, which has become a powerful supplement to the development of Wushu under the state's formal system. In the inheritance of rural Wushu may be full of contradictions between city and countryside, tradition and modernity, benefit and righteousness, and the social action of inheritors should not only conform to the tradition, but also adapt to the changing situation. [ABSTRACT FROM AUTHOR]

To explore the stability of hydrogen peroxide, using sodium chlorate as the matrix and hydrogen peroxide as the reducing agent, several kinds of stabilizer was studied to reduce the decomposition of hydrogen peroxide by stabilizing agent HEDP compared with several kinds of composite stabilizer, determine the optimal stabilizer for A composite stabilizer (magnesium sulfate: sodium silicate: HEDP = 7: 5: 1), the best dosage of 2. 5 % of hydrogen peroxide mass fraction of reaction materials, can effectively have the stable effect of hydrogen peroxide, thus improving the yield of chlorine dioxide and its purity, and thus lay the foundation for its industrial production. [ABSTRACT FROM AUTHOR]

Based on the grounded theory approach, this paper conceptualizes, categorizes and encodes the relevant content of knowledge sharing barriers with interview data. A model based on knowledge sharing handicaps among project teams of real estate enterprises is established. Research results show that knowledge sharing performance among project teams are largely influenced by four subjective factors, one objective factor and four environmental factors in real estate enterprises. The findings of this study can provide the theoretical foundation for managers to improve knowledge sharing performance. [ABSTRACT FROM AUTHOR]

Sugar metabolism is the process operated by nearly all organisms for the supplement of nutrition and energy. As one of the most widely used monosaccharides in nature, glucose is an ideal carbon source for microorganisms. Pseudomonas stutzeri A1501 has the canonica microbial metabolic pathways. However, it has a very low rate for glucose utilization. Genome analysis of P. stutzeri A1501 suggested that A1501 could not use glucose by the Embden-Meyerhof-Parnas (EMP) pathway, because it lacked the key glycolytic enzyme 6-phospholfructokinase encoded hy pfkA. An Escherichia coli pfkA gene was cloned and transferred to P. stutzeri A1501 to accomplish the reconstruction in vivo of the complete set of enzymes for enabling a functional EMP pathway in A1501. The expression of pfkA in P. stutzeri A1501 failed to glucose utilization by the EMP pathway, suggesting that there were other systems that might affect the glucose utilization except for the pfkA gene. It was also observed that the recombinant A1501-pfkA strain became more sensitive to hydrogen peroxide, compared to the wild type. We further hypothesized that the major reason for pfkA confers decreased oxidative tolerance to P. stutzeri A1501 was due to the influence of its NADPH formation. [ABSTRACT FROM AUTHOR]

[Objective]The present experiment was conducted to investigate yield, adaptability and quality characteristics of P. purpureum Schumach cv. Purple to provide reference for the certification and development of new variety. [Method]By taking P. purpureuum Schumab cv. Purple as experimental material, its variety comparison tests were conducted in Nanning, Lingyun, and Tiandeng in Guangxi from 2007 to 2009. And furthermore, variety regional trials were conducted in Danzhou of Hainan, Fuzhou of Fujian and Zhanjiang of Guangdong from 2011 to 2013. Meanwhile its comprehensive characters viz., plant height, hay yield, stem-leaf ratio and nutritional components were determined, and were compared with that of P. purpureum×P. americanum cv. Reyan No.4 and P. purpuream Schum cv. Guiminyin. [Result]The results showed that, the average height of P. purpureum Schumach cv. Purple was 706.54 cm, which was 5.92% and 8.44% lower than that of P. purpureum×P. americanum cv. Reyan No.4 and P. purpureum Schum cv. Guiminyin, respectively. The average hay yield of P. purpureum Schumach cv. Purple was 32.74 t/ha in Nanning, Lingyun, and Tiandeng of Guangxi from 2007 to 2009, and 22.41 t/ha in Danzhou of Hainan, Fuzhou of Fujian and Zhanjiang of Guangdong from 2011 to 2013. While its hay yield was lower than two check varieties, the difference was not significant (P>0.05). The stem-leaf ratio of P. purpureum Schumach cv. Purple was 0.98:1. Moreover, by analysing nutritional components of its dry matter, compared with P. purpureum×P. americanum cv.Reyan No.4 and P. purpureum Schum cv. Guiminyin, the crude fiber was decreased by 4.76% and 2.78%, respectively; the neutral detergent fiber decreased by 5.07% and 2.22%, respectively; the acid detergent fiber was decreased by 2.54% and 1.99%, respectively; the crude fat was increased by 64.29% and 43.75%, respectively; the calcium content was increased by 28.00% and 33.33%, respectively; the phosphorus content was increased by 9.68% and 22.73%, respectively; the total contents of amino acid was increased by 43.23% and 68.41%, respectively; the anthocyanin content of leaf was increased by 400.00% and 216.90%, respectively (P<0.05). [Conclusion]P. purpureum Schumach cv. Purple is new high-quality forage variety with wide adaptability, high yield, rich nutrient and good palatability, that is appropriate for comprehensive exploitation and application in southern region of China. [ABSTRACT FROM AUTHOR]

According to abnormal complicated stress problem occurred in the site application of the middle pans in the scraper conveyor of coal mining face, with the analysis on the site performances of the middle pans, mechanics model under two different performances of the scraper conveyor and powered support moving forward was established. The related calculation formula was interred. Meanwhile, based on the circumstances, with the CAD/CAE functions of the Pro/ENGINEER and ANSYS software, a finite element strength analysis and study was conducted on the middle pans of the scraper conveyor. The analysis results showed that stresses of the major middle pans and pushing trunnion were all below 300 MPa and the stresses at the tow ends of stressed dumbbell were less than yield limit. Thus the strengths of the middle pans, dumbbell end and other key parts could meet the designed requirements when the powered supports were pushed forward. The end of the raised part would be the stress concentrated area and would easily be a tensile failure. The round part size of the end should be enlarged to reduce a stress concentration. With optimized design of the structure, the problems possibly existed in the actual application of the middle pans were solved and the reliability and service life of middle pan could be ensured. [ABSTRACT FROM AUTHOR]

Bispectrum which can be used for transmitter identification reflects the fine features of signals, but it will lead to the work of computing the complex matching templates, adding the complexity of classifier and influencing the recognition efficiency when applied to the transmitter identification directly. To solve this problem, a novel approach treating the fractal features of surrounding-line integral bispectrum as the feature parameters of transmitters is proposed. Surrounding-line integral bispectrum is obtained by the bispectrum estimator, and the complexity of its wave shape can be quantitatively described by box dimension and information dimension which are selected as the eigenvector. Then the support vector machine(SVM) is applied for individual transmitter identification. Finally, the 2FSK signals sent by two different transmitters are analyzed, and the results show that the recognition accuracy is over 94. 29% when signal-to-noise ratio(SNR) is more than 7dB,which proves that the introduced method is effective. [ABSTRACT FROM AUTHOR]

In 2013, there were 89 times for Chinese films to win 116 awards in 22 international film festivals. Those films cover a wide range of 15 genres: drama, war, act, love, etc. and the first two account for the majority of the award-winning films. If more Chinese films are to win the international awards, both the quantity and quality of such films should be raised, and meanwhile more aid should be given to the low-cost and artistic films. In addition, China should have its own international film festival. [ABSTRACT FROM AUTHOR]

FZ/T 20026--2013 "Test method for fibre length and diameter of wool top & slivers -- Optical analyser" has been officially released, as an important wool length and diameter testing method of tops, this paper introduces the design process of the standard. By organizing domestic round test and analysis of test results, determine technical details of the test method. The establishment of the method has a positive role in promoting the understand of the current advanced wool length and diameter testing methods, and enhance the level of wool industry product quality control. On the other hand, understand the working principle and test accuracy of optical analyser for wool top length and diameter, has a certain role in promoting the work of development of the domestic related test equipment. [ABSTRACT FROM AUTHOR]

A dynamic model of tricycle-undercarriage-UAV ground maneuvers is established using elastic tire theory. With full consideration of loads applied to UAV, the model can describe the process of the UAV ground maneuvers exactly. The simulation is based on a series of parameters of a real UAV. The constraints are put forward by analyzing some data from simulation, which affect the ground maneuvers of UAV. At last, the available range of UAV ground maneuvers is given. [ABSTRACT FROM AUTHOR]

The soil organic carbon (SOC) and total nitrogen (TN) storage under five different land use patterns, i. e. , poplar and Caragana microphylla plantation, C. microphylla artificial shrubland, poplar plantation, bare land and cropland were studied in the hilly Loess Plateau of north-western Shanxi. The results showed that the contents, densities and storage of SOC and TN varied remarkably under the different land-use patterns. Soil carbon and nitrogen contents and storage in the 0-20 cm soil layer were significantly higher in the 20-40 cm and 40-60 cm soil layers under each of the five land use patterns. In the same soil layer, the contents and densities of SOC and TN under the five land use patterns were in the order of poplar and C. microphylla plantation > C. microphylla artificial shrubland > poplar plantation > bare land > cropland. The SOC storage in the 0-60 cm soil layer was in the order of poplar and C. microphylla plantation (30. 09 t.hm-2) > C. microphylla artificial shrubland (24. 78 t.hm-2 ) > poplar plantation (24. 14 t.hm-2 ) > bare land (22. 06 t.hm-2) > cropland (17. 59 t.hm-2). Soil TN storage had the same trend as SOC storage, and TN storage in the 0-60 cm soil layer was the highest (4. 94 t.hm-2 ) in poplar and Caragana microphylla plantation, followed by C. microphylla artificial shrubland (3. 53 t.hm-2), poplar plantation (3. 51 t.hm-2), bare land (3. 40 t.hm-2 ), and cropland (2. 71 t.hm-2 ). Poplar and C. microphylla plantation and C. microphylla artificial shrubland were the good land use patterns in the process of vegetation construction and ecological restoration in the hilly Loess Plateau of northwestern Shanxi. [ABSTRACT FROM AUTHOR]

CsrA was initially found and named during research on the carbon storage regulatory system. CsrA affects stability and translation of target genes by binding mRNA as a widespread post-transcriptional regulator in Enterobacterium, Pseudomonas, Bacillus and other microorganisms. Studies indicated that CsrA not only regulated a number of physiological processes such as central carbon metabolism, motility, biofilm formation, quorum sensing, and pathogenicity, but also influenced the synthesis of man)' secondary metabolites. Recent research showed that the functions of CsrA were strictly related to two non-coding RNAs; these three genes coordinated to form a complex system. This review introduced the various functions of CsrA in different bacteria and its regulatory mechanism, information that will be useful for learning more about the regulatory mechanism of the carbon storage system and alter it for future studies. [ABSTRACT FROM AUTHOR]

In this study, a full-length cDNA sequence of DREB transcription factor gene, HhDREB2 (GenBank No.: EU872018), was isolated from Halimodendron halodendron. Voss by homology-based cloning and RACE (rapid amplification of cDNA end) technology. Sequence analysis showed that the cDNA sequence was 873 bp without introns and had a maximum open reading frame from 108 to 626 bp, encoding 172 amino acid residues. Molecular weight of the gene encoding protein was 19.702 kDa, isoelectric point was 8.92. Phylogenetic tree and homologous sequence alignment analysis indicated that this protein contained a typical AP2/ERF conservative domain, and was most closely related to soybean GmDREB2, belonging to the A5 subgroups. Yeast one-hybrid experiment demonstrated that HhDREB2 gene encoded a transcription activator. In addition, subcellular localization analysis of a construct with the transient expression vector of the HhDREB2 gene showed that the HhDREB2 protein was localized in the nucleus. The expression level of HhDREB2 gene was greatly induced by high salt, drought and low temperature through semi-quantitative RT-PCR, and had no significant change with GA3, NAA, ABA and 6BA treatments. [ABSTRACT FROM AUTHOR]

RsmA is a highly conservative global regulator in Pseudomonas, which could affect mRNA stability or control the translation of the target gene, and then to affect protine expression by combining mRNA of the target gene. in nitrogen-fixing Pseudomonas stutzeri A1501, there were one rsmA homologus gene and one non-coding small RNA gene rsmZ that might regulate RsmA activity. The evolution of RsmA and RsmZ in A1501 and conducted additional studies on their expression indicated that RsmA of A1501 shared 98% genetic similarity with RsmA of Pseudomonas aeruginosa PA01 and RsmZ contained 4 RsmA binding sites. The real-time PCR results showed that the rsmA transcription level was high in early growing period and droped down in the exponential growing and stable phases. The expression of rsmZ did not change significantly during the whole growing period. Under carbon starvation conditions, rsmA and rsmZ genes significantly reduced level of transcription. The mutation of rpoS did not affect rsmA expression; however, rsmZ transcription was enhanced by 30-fold, indicating that rsmZ was negatively regulated by rpoS. Further study indicated that there were no changes in the expression of rsmA and rsmZ in gacA mutant. Based on the above experiments, the regulatory model of rsmA and rsmZ in A1501 was different from other Pseudomonas, such as Pseudomonas fluorescens CHAO and Pseudomonas aeruginosa PA01. This paper has laid a theoretical foundation for further studying rsmA function and its regulatory mechanism under spesific condition. [ABSTRACT FROM AUTHOR]

In the complex environment, microorganism select to use the perferred carbon source by carbon catabolite repression( CCR) and at the same time inhibit the non-perferred carbon sources, so as to achieve the best growth and metabolism procedure. This phenomenon is widespread in bacteria, but there exist differences among different species. In Escherichia coli, CRP protein plays the core role, while in Pseudomonas, the CbrAB-CrcZ-Crc system is critical. Crc protein is a global regulator. CrcZ is a newly identified non-coding regulatory RNA, whose expression is regulated by 2 component system CbrAB. The whole regulatory process is under complex and efficient control. Combining the related international recent progresses and our laboratory work, this paper introduced in detail the regulation mechanism of CCR by CbrAB-CrcZ-Crc regulation system in Pseudomonas, expected to improve our awareness about the regulatory mechanism of carbon metabolism and microorganism's adaptability to environment. [ABSTRACT FROM AUTHOR]

The article focuses on the study which examines the shear behavior of high strength concrete square columns retrofitted by four carbon fiber-reinforced plastics (CFRP) hybrid methods using low reversed cyclic loading test.

The article presents a study on cloning and sequencing of ORF4-7 genes for European type porcine reproductive and respiratoroy syndrome virus strains (PRRSV)-FJ0602 and the PRRSV-FJ0603.

In order to reveal the soluble organic matter effect on the spontaneous combustion of coal, the infrared spectroscopy and GC/MS experiments were used to test the changes of coal surface microstructure and product ingredients after extracted by tetrahydrofuran. Based on the results of soluble organic matter affect the pore structure of the coal, and according to the gas-product release law of low temperature oxidation of coal before and after the extraction, effect of soluble organic matter of the coal on surfactant structure and low temperature characters of coal oxidation was discussed. The results indicate that after extraction, the content of hydroxyl and carboxyl in residual coal is reduced. Meantime, mineral content and active side chains and functional groups which involve high-content oxygen in coal also reduce. Coal soluble organic matter contains a large amount of the active groups, such as methyl, hydroxyl, carbonyl and ether etc. The total pore volume and surface area of the residual coal is increased in varying degrees. The average pore size of residual coal reduces from 6. 3 nm to 4. 9 nm. The oxygen consumption of extracted residual coal in low-temperature oxidation stage is significantly lower than that of raw coal, and CO, CO2, C2H4 and C2H6 gas emission reduced than raw coal to some extend. The soluble organic matter in coal promotes the spontaneous combustion of coal. [ABSTRACT FROM AUTHOR]

The article focuses on a study related to the sequencing and cloning of the neuraminidase gene of Haemophilus parasuis and to predict the secondary structure and B-cell epitopes of the gene. Topics discussed include importance of secondary structure in the study of immune mechanism and epitope vaccine, use of bioinformatics tools in the prediction of preponderant epitope of neuraminidase, and use of self-optimized prediction method with alignment in determination of the secondary structure.

Aiming to study the inhibiting oxidation effect of ionic liquid (IL) on coal, this study used two ionic liquids with imidazolium based cations substituted by different oxygen-containing groups, [AOEmim] BF4 and [HOEmim] BF4, to dissolve coal. The dissolving ability of the two ionic liquids for functional group in coal was studied by In-Situ Fourier Transform Infrared Spectroscopy (In-Situ FTIR). The results show that the ionic liquid can dissolve coal and react with coal by complexion formation and create carboxyl. According to the thermo analysis experiment results, the [AOEmim] BF4-pretrreated coal releases heat more quickly than the [HOEmim] BF4-pretreated coal does before 250 °C. After 250 °C, the exothermic rates of the two pretreated coal samples both reduce sharply. The exothermic rate of [HOEmim] BF4 pretreated coal reduces more earlier than that of [AOEmim] BF4 pretreated one. Synthesizing the FTIR and DSC results, the mechanism of interaction between the [HOEmim] BF4 and coal was analyzed. [ABSTRACT FROM AUTHOR]