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Copyright of Coal Geology & Exploration is the property of Xian Research Institute of China Coal Research Institute and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The grass-planted strips at the edge of arable land is conducive to enhancing farmland biodiversity and ecosystem function. To investigate the effects of field margin grass strips on surface arthropods and their construction methods, artificial grass strips consisting of different plant species (two, four, six and eight plant combinations, respectively) were set up in an intensive farmland in north China as the study area, and surface arthropods were collected by the trap method and their community structure characteristics were investigated in response to different plant combinations. The results showed that the dominant taxa of surface arthropods in this study were woodlice, spiders, crickets, millipedes, among which woodlice were the most dominant arthropod taxa, accounting for 52.06% of the total number, and the number and relative abundance of woodlice in the artificially planted grass belts were higher than that in uncultivated land and farmland treatments. Compared with farmland control treatment (CKN), the artificially planted grass belts significantly increased the abundance and number of groups of surface arthropods, with those in treatments T6 and T8 significantly higher than that of T4 and T2. T6 and T8 treatments had significantly higher abundance and number of groups of surface arthropods than T4 and T2 treatments. Analyses of surface arthropod trophic functional groups revealed that the artificial planted grass strips significantly increased the number of surface arthropods in various trophic functional groups, especially detritivores and predators, with the T6 and T8 treatments having 2.9 and 3.9 times more detritivores than the wasteland treatment (CKH), 5.3 and 6.9 times more detritivores than the farmland treatment CKN, respectively, while the T6 treatment had 60% and 90% more predators than the CKH and CKN treatments, respectively. Correlation analyses revealed that most of the biodiversity characteristics of surface vegetation were positively correlated with the abundance of surface arthropods and the number of groups. Among them, vegetation coverage, above-ground biomass and species were significantly and positively correlated with the number of groups of surface arthropods, while vegetation abundance was negatively correlated with the abundance of surface arthropods and vegetation coverage was not correlated with the abundance of surface arthropods. Overall, in north China, artificial grass belts significantly increased the abundance and diversity of surface arthropods, supporting more arthropods, especially detritivores and predators, which enhanced the nutrient cycling and biological pest control functions of agro-ecosystems. Among the treatments with four different artificial plant combinations, the marginal grass belts with the six plant species combination and eight plant species combination were more beneficial for the establishment of surface arthropod communities and the improvement of farmland ecosystem functions in north China. [ABSTRACT FROM AUTHOR]

Cassia Semen, derived from the dried ripe seeds of leguminous plant Cassia obtusifolia Linn. or Cassia. tora Linn., exhibits a variety of pharmacological effects such as clearing heat to brighten the eyes, lubricating the intestine to relieve constipation, lowering blood pressure and lipids, hepatoprotection and anti-diabetes, etc. And due to its homology of medicine and food, it has broad development prospects in the fields of medicine and food. Based on the summary and analysis of the published literatures, this paper systematically reviews the integrated research progress of Cassiae Semen in recent years from the aspects of bioactive ingredients, pharmacological effects, toxicity and its applications in the food field. Additionally, the emerging challenges and possible development directions for the study of Cassiae Semen are discussed as well. In future research on Cassiae Semen, more attention should be paid to the pharmacological effects of naphthopyranones and polysaccharides and their mechanisms underlying improving eye diseases. Meanwhile, it is essential to focus on strengthening the researches on the pharmacokinetics of Cassiae Semen and the safety evaluation of its related functional foods. This article provides new basic information for further research, development, and utilization of Cassiae Semen. [ABSTRACT FROM AUTHOR]

The inhibitory activity of some fungicides against kiwifruit canker was evaluated by ultraviolet spectrophotometer. Mixing two active fungicides, nano-magnesium hydroxide was used as the drug carrier to study loading capacity to the mixed fungicide. The synergistic effect nano-magnesium hydroxide on the anti-kiwifruit canker bacteria of the mixed compound fungicide was evaluated. Besides, the field application effect of compounded drags loaded with nano-Mg (OH) 2 was studied. The results showed that the tested bactericidal agents all showed a certain inhibitory activity against kiwifruit canker. Among them, the compound drag- nano-Mg (OH) 2 had the best antibacterial activity with an EC50 of 23.50 µg/mL, followed by the compound drug with an EC50 of 42.11 µg/mL. The use of nano-magnesium hydroxide as the drag carrier has a good synergistic effect on the drug against kiwifruit canker. It can significantly improve the antibacterial activity of the drug. And the content of nano-Mg (OH) 2 has a significant effect on drug loading and encapsulation efficiency. When the magnesium hydroxide content was increased from 1 mg to 3.5 mg, the drug loading increased by 43% and the encapsulation efficiency increased by 11%. In addition, the compound drag- nano-Mg (OH) 2 carrier agent has a good field control effect on kiwifruit canker, and the control effect can reach 73.8%. [ABSTRACT FROM AUTHOR]

Copyright of Coal Science & Technology (0253-2336) is the property of Coal Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Arid Land Geography is the property of Chinese Academy of Sciences, Xinjiang Institute of Ecology & Geography and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The space effect of translation field helps to elaborate on the historical implications of regional translation activities within a particular time. The generation and transformation of the translation field in modern West China reflect the missionary movement in the context of colonial expansion and literati's expedition westward in the context of Anti-Japanese War. Take the mid- 1930s as the dividing line, missionaries from Western countries served as main actors in the translation field in the earlier stage whereas Chinese literati in the later stage. The two translator groups were endowed with different cultural identities, thus held distinct agenda when they conducted translation. The substitution of main actors fundamentally transformed the positiontaking situation of the translation field in West China. The implicit cultural imperialism involved in missionary translators' attempt to disrupt local cultural identity and build knowledge power system through translation should be criticized, whereas the nationalist consciousness displayed in Chinese translators' resistance to cultural hegemony, resolution of the frontier crisis and construction of national identity through translation should be approved. [ABSTRACT FROM AUTHOR]

The inducers of the chemical or physical factors could affect the gene expression and transcription of strain directly or indirectly. In order to explore the inductive effect of higher alcohol on Galactomyces geotrichum, the G. geotrichum S12, derived from the soil, was induced by five higher alcohols, including n-propanol, n-butanol, isobutanol, nhexanol and isoamyl alcohol. The effects of induction dose and induction time for degradation activity of different higher alcohols by strain S12 and its transforming enzyme were studied. The results showed that the enzyme activity formed by strain S12 was higher when the inducers were chosen as n-hexanol and isobutanol. The optimum induction time was 6 h when n-propanol, n-butanol, isobutanol and n-hexanol were used as inducers. While the optimum induction time of strain S12 and enzyme induced by isoamyl alcohol was 12 h. When n-propanol and n-hexanol were used as inducers, the optimal concentration was 1.5 g/L. While the optimal concentrations of strain S12 and enzyme induced by n-butanol, isobutanol and isoamyl alcohol were 1.0, 0.5 and 2.5 g/L, respectively. The results of native polyacryplamide gel electrophoresis (Native- PAGE) indicated that dehydrogenase formation, molecular weight about 223 kDa, was induced by five higher alcohols. In particular, the strain, induced by hexanol, had much higher capability in degrading five higher alcohols at the same time. The products of the above five higher alcohols after catalyzing by G. geotrichum S12 induced by hexanol were their corresponding acids and esters. [ABSTRACT FROM AUTHOR]

This study investigated the effects of a narrative-driven, environmental justice--focused 5+1 staged-course module on the learning experiences and curricular perceptions of students. The study population comprised 128 students from 4 classes conducted by 2 universities in southern Taiwan. They represented four cohorts across two semesters spanning the period from 2021 to 2022. An exploratory mixed-methods research design was used to conduct qualitative analyses of the students' reflective writings before and after their field trips. Additionally, 100 qualified field trip participants underwent post--field trip surveys, and the results were quantitatively assessed. A qualitative inquiry revealed that the students held a hexagonal conceptualization of environmental injustice before their field trip. Post--field trip analyses were conducted to understand the students' learning experiences from their field trips; the experiences involved profound reflections on public issues, the value of education, affective development, and appreciation of locality. Crucially, resident guides, who narrated their life stories, were instrumental in expanding the students' cognitive and empathetic engagement, educating them on field-specific topics and fostering in them a compassionate awareness of others and diverse locales. The statistical findings of this study revealed the significant influence of these resident guides in shaping the students' recognition of the field as an appropriate classroom setting. These guides infused distinct meanings into the curriculum, aligning it with the belief that relocation is inadequate as a response to environmental injustice. In summary, integrating narratives into an issue-centric learning module significantly broadened the learning horizons and experiences of the students, thereby deepening the pedagogical effects of outdoor learning. The findings indicate future courses should incorporate formative quantitative evaluations to strengthen the connection and assimilation of foundational knowledge to provide a comparative baseline for modules and enhance longitudinal fieldtrip analyses to advance research on outdoor education. [ABSTRACT FROM AUTHOR]

bjective To discuss the inductive effect of testosterone on the apoptosis of the granulosa cells in vitro, and to clarify its mechanism. Methods The inhibitory rates of proliferation of human ovarian granulosa cells SVOG were detected by methyl thiazolyl tetrazolium（MTT) assay. After screening the optimal concentrations of the drugs, the SVOG cells were divided into control group, testosterone group (1.0×10-5 mol·L-1 testosterone), testosterone+fluorothiamine group（1.0×10-5 mol·L-1 testosterone+ 1.0×10-5 mol·L-1 fluorothiamine), and testosterone+tauroursodeoxycholic acid (TUDCA) group (1.0×10-5 mol·L-1 testosterone+1.5 g·L-1 TUDCA) . Real-time fluorescence quantitative PCR (RT-qPCR) method was used to detect the expression levels of spliced X-box binding protein 1 (XBP1s), activating transcription factor 4 (ATF4), transcription factor C/EBP homologous protein (CHOP), and death receptor 5 (DR5) mRNA in the SVOG cells in various groups; flow cytometry was used to detect the apoptotic rates of the SVOG cells in various groups. Results Compared with control group, the SVOG cells in testosterone group showed morphological changes, the number of atypical cells was increased, the granularity in the cytoplasm was increased, the cell fragments in the culture medium was increased, and the inhibitory rate of proliferation of the SVOG cells was increased (P<0.05) . Compared with testosterone group, the morphological changes of the cells in testosterone +fluorothiamine group and testosterone+TUDCA group were decreased and inhibitory rates of proliferation of the cells were decreased（P<0.05) . The flow cytometry results showed that compared with control group, the apoptotic rate of the SVOG cells in testosterone group was significantly increased (P<0.05). Compared with testosterone group, the apoptotic rates of the SVOG cells in testosterone + TUDCA group and testosterone + fluorothiamine group were significantly decreased (P<0.05) . The RT-qPCR analysis results showed that after treated for 48 h, compared with control group, the expression levels of XBP1s, ATF4, CHOP, and DR5 mRNA in the SVOG cells in testosterone group were increased (P<0.05) . Compared with testosterone group, the expression levels of XBP1s, ATF4, CHOP, and DR5 mRNA in the SVOG cells in testosterone+TUDCA group and testosterone+fluorothiamine group were decreased (P<0.05) . Conclusion Testosterone can induce the apoptosis of human ovarian granulosa cells and cause follicular atresia, and its mechanism may be that androgen combined with adrogen receptor（AR) activates the CHOP-DR5 pathway, induces endoplasmic reticulum stress（ERS), and promotes the apoptosis of the granulosa cells. [ABSTRACT FROM AUTHOR]

Copyright of Advances in New & Renewable Energy is the property of Editorial Office of Advances in New & Renewable Energy and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Natural Gas Geoscience is the property of Natural Gas Geoscience and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Tea Science is the property of Journal of Tea Science Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Acta Agriculturae Zhejiangensis is the property of Acta Agriculturae Zhejiangensis Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Mechanical Engineering is the property of Editorial Board of China Mechanical Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of International & Comparative Education is the property of International & Comparative Education Editorial, Beijing Normal University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Acta Scientiarum Naturalium Universitatis Sunyatseni / Zhongshan Daxue Xuebao is the property of Sun-Yat-Sen University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Harbin Institute of Technology. Social Sciences Edition / Haerbin Gongye Daxue Xuebao. Shehui Kexue Ban is the property of Harbin Institute of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Chongqing University of Technology (Natural Science) is the property of Chongqing University of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Henan Agricultural Sciences is the property of Editorial Board of Journal of Henan Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In order to study the influence of different coverings on wind velocity distribution in forest and windbreak effect, we examined 4 shelterbelt models which were different covering models. These models were used for a wind tunnel simulation under wind speed to evaluate the effects of coverings on the wind field and the protective effects of the shelterbelt. The results showed that within the height range of shelterbelt in the forest network, the coverings had a significant impact on the wind speed field before and after the forest belt, especially for the tall fruit crops. Under the wind speed of 8 m·s-1 the order of the average wind speed in each model forest network was Walnut + wheat mode < Apple + wheat mode < jujube + wheat mode < pure wheat mode < CK. The analysis of average control efficiency at 1 cm and 2 cm height in forest net showed that the windbreak efficiency of three fruit tree models was the best. Although the control effect of pure wheat model was weaker than that of fruit tree model, it still had a certain control effect. The results showed that the windbreak efficiency of the forest belt was significantly enhanced by the mulch in the forest net, especially the fruit crops. Therefore, with the advance of intensification and precision of agriculture, we should consider the wind proof effect of the crops especially a tall crops in the forest network when the shelterbelt is set. In order to improve economic benefits, the size of forest network should be adjusted properly and the structure of forest belt should be allocated reasonably. [ABSTRACT FROM AUTHOR]

【Objective】The research was carried out to clarify the field control effects of six agents on blossom blight of kiwifruit, and to screen efficient and safe agents for guiding the field production of kiwifruit.【Method】The field control experiment was carried out by using random block design, and the incidence rate and disease index of blossom blight of kiwifruit after the application of six agents were determined, and the control effects were evaluated by calculating the change values of incidence rate and disease index before and after treatment. The safety of each agent was evaluated by its effects on the growth situation of kiwifruit plants and the development characteristics of flowers and fruits.【Result】Six agents showed different control effects on blossom blight of kiwifruit, and all of them were safe to kiwifruit plants. The results of field trials showed that there was no significant difference in incidence rate and disease index between the treatment groups and the CK group before control. After two consecutive treatments, the incidence rates of treatment groups and CK group showed an increasing trend compared with those before control, and the change values of the disease situation were significantly different, among which the change value of the CK group was the largest, and the incidence rate and disease index increased by 13.29% and 6.84, respectively. The change values of kasumin • brothermothingonil and tetramycin•propyrithiazole were the smallest, with the increase of incidence rate less than 1.50% and the increase of disease index less than 1.00. The field control effect corresponded to the disease situation. After two consecutive treatments, the treatment of kasumin • brothermothingonil showed the highest control effect, followed by tetramycin•propyrithiazole, both of which were above75%. All agents had no phytotoxicity symptoms and other adverse effects on kiwifruit plants after the application of agents, and showed different degrees of flower protection, fruit protection and yield increase compared with the CK group. The results showed that among the six agents, kasumin • brothermothingonil and tetramycin • propyrithiazole were the most effective in delaying the transmission and spread of the pathogen of blossom blight of kiwifruit, reducing the disease severity, and controlling blossom blight of kiwifruit efficiently and safely.【Conclusion】Two effective and safe agents - kasumin • brothermothingonil and tetramycin • propyrithiazole are screened for blossom blight of kiwifruit, which can be promoted in field production of kiwifruit. [ABSTRACT FROM AUTHOR]

Copyright of Systems Engineering & Electronics is the property of Journal of Systems Engineering & Electronics Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Guangdong University of Technology is the property of Journal of Guangdong University of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Ordnance Equipment Engineering is the property of Chongqing University of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Piezoelectrics & Acoustooptics is the property of Piezoelectric & Acoustooptic and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In order to explore the feasibility of pyraclostrobin in preventing diseases of wheat at different growth stages, the virulences of pyraclostrobin against the causal agents of wheat sheath blight (Rhizoctonia cerealis), root rot (Bipolaris sorokiniana), total rot (Gaeumannomyces tritici), and head blight (Gibberella zeae) were determined by the mycelial growth rate method. Using the seed germination test, the effect of different concentrations of pyraclostrobin coating on wheat seed germination was determined. The control effects of pyraclostrobin 5% FS on wheat sheath blight in pots were determined by the bacteria-soil mixing method and the field control effects of pyraclostrobin 5% SC against R. cerealis, B. sorokiniana, G. tritici, and G. zeae were also determined. The results showed that the EC50 value of pyraclostrobin against R. cerealis, B. sorokiniana, G. tritici, and G. zeae were 0.404, 5.862, 0.193, and 1.372 mg/L, respectively. Different coating ratios of pyraclostrobin 5% FS had a certain promotion effect on the fresh weight and dry weight of Jimai 22 under the condition of 25 and showed a certain promotion effect on the germination potential, germination rate, germination index, and vigor index of wheat seeds under the condition of 10. The pot experiment showed that pyraclostrobin 5% FS had a control efficacy of more than 74% on wheat sheath blight 20 days after seedling, and the control efficacy reached 99.02% when the coating ratio was 1.50. The control efficacies of pyraclostrobin 5% SC on wheat powdery mildew, rust and scab were 100%, 100%, and 75.87% respectively under the dose of 3000 mL/hm2 with two sprays during early flowering and full flowering periods. The research showed that pyraclostrobin can be well applied to the control of wheat diseases in different growth stages. [ABSTRACT FROM AUTHOR]

Copyright of Clean Coal Technology is the property of Clean Coal Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This paper mainly studies the preparation process of N-type high-efficient crystalline silicon tunnel oxide passivated contact (TOPCon) cells by low pressure chemical vapor deposition (LPCVD) method. The influencing factors of the preparation of tunnel oxide layer and polycrystalline silicon layer by LPCVD were studied and analyzed. The effects of different oxide layer thickness, polysilicon thickness and polysilicon doping amount on the efficiency were studied. The results show that: the thickness of tunneling oxide layer of 1.55 nm shows the best passivation effect; the Voc reaches the highest value when the thickness of polysilicon layer is 120 nm; the Eff reaches the highest when the thickness of polysilicon layer is 90 nm. The field passivation effect of polysilicon layer increases with the increase of P doping concentration. Higher Voc can be obtained when the P doping concentration is 3.0 x 1015 cm-2. [ABSTRACT FROM AUTHOR]

Copyright of Clean Coal Technology is the property of Clean Coal Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Remote Sensing is the property of Editorial Office of Journal of Remote Sensing & Science Publishing Co. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In order to solve the problem of low viscosity of polyacrylamide solution caused by low relative molecular weight of ordinary polyacrylamide and poor application effect in oil field, this paper mainly describes other methods of synthesizing ultra-high molecular weight polyacrylamide, such as aqueous solution polymerization, reverse phase polymerization, precipitation polymerization, micellar polymerization, radiation polymerization, photoinduced polymerization, and summarizes various synthesis methods of ultra-high molecular weight polyacrylamide, the characteristics of synthesis, application conditions, advantages and disadvantages of large-scale industrial production, and the research direction of ultra-high molecular weight polyacrylamide in the future are prospected. [ABSTRACT FROM AUTHOR]

Copyright of Cotton Textile Technology is the property of Cotton Textile Technology Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Natural Gas Industry is the property of Natural Gas Industry Journal Agency and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

functional monomer into the molecular chain, and the integrated variable viscosity and anti-salt drag reducing agent is developed in combination with the composite suspension technology. Methods The comprehensive properties of the integrated variable viscosity and anti-salt drag reducing agent were studied by experimental methods. The solubility, viscosity increasing and sand carrying properties, salt and temperature resistance and resistance reducing properties of drag reducing agents were investigated. Results The resistance reduction rate of integrated variable viscosity with a dosage of 0. 03 wt% and anti-salt drag reducing agent in clean water could reach 81%. In brine with salinity over 20 000 mg/L, the viscosity retention rate was 91% 9 and the resistance reduction rate remained above 75%. The viscosity of the system could be adjusted in real time from 3. 4 mPa • s to 60 mPa • s by adjusting the amount of resistance drag reducing agent. Compared with the same type of conventional emulsion type drag reducer, the static sand suspension ability was greatly improved, and it could meet the construction requirements of reservoirs above 150 °C. Using the integrated variable viscosity slick water system combined with multi-scale high-density fracture fracturing technology to implement 7 wells in the tight gas field in western Sichuan, the construction success rate was 100%, the average resistance reduction rate of single well was 81 % 9 the sand adding intensity was 3. 86 t/m 9 which was 7. 7 times of the conventional integrated slick water in the early stage, and the effect of field application is remarkable. Conclusions The excellent performance of the integrated variable viscosity and anti-salt drag reducing agent could meet the comprehensive requirements of the field construction, and the field application proves that it has a good application prospect. [ABSTRACT FROM AUTHOR]

A rapid fluorometric method was established to detect glyphosate by using cerium ion and pyrophosphate ion (Ce-PPi) coordination polymer networks (CPNs). Based on coordination of cerium ion (Ce3+) and pyrophosphate ion (PPi), fluorescent Ce-PPi CPNs were synthesized by simple selfassemble process, and the structure and properties were characterized. Upon introducing glyphosate, the ligand field effect of PPi with Ce3+ was weakened resulting in a decrease in fluorescence of Ce-PPi CPNs. Based on this principle, the quantitative detection of glyphosate was achieved by optimizing the conditions, with R² of 0.997 2 and the detection limit of 0.014 μmol/L. The established method based on Ce-PPi CPNs possessed outstanding sensitivity and exclusive selectivity for rapid detction of glyphosate, and could be used for the detection of glyphosate in tap water and apple samples. The limit of quantitation (LOQ) was 0.05 mg/kg and the recoveries were between 77% and 87%. The method provided a potential choice for the rapid, on-site and real-time, detection of glyphosate. [ABSTRACT FROM AUTHOR]

To improve the mobility of abamectin in soil and its effect on controlling crop root-knot nematode, abamectin 3% nanocapsule suspension concentrate was prepared by electrostatic self-assembly method, and the storage stability and release performance were measured. The soil mobility of nanocapsules was evaluated by soil leaching test and soil thin-layer chromatography. The toxicity against the second-stage juvenile (J2 ) of Meloidogyne incognita and field application effect was investigated. The average particle size (D50) of abamectin nanocapsules was 276.81 nm. In the release solution, the cumulative release was 57.59% at 60 min, whereas that of abamectin 3% EC was 94.53%. The horizontal and vertical movement distance of abamectin nanocapsule suspension concentrate in soil was significantly greater than that of abamectin 3% EC. The LC50 value of abamectin nanocapsule suspension concentrate and EC against the J2 of root-knot nematodes at 24 h were 0.257 and 0.427 mg/L, respectively. Under the same pesticide usage, the control efficacy of abamectin 3% nanocapsule suspension concentrate using flood irrigation and soil mixing methods were 21.82% and 4.81% respectively, which were higher than that of abamectin 3% EC at 60 days after treatments. The control efficacy of abamectin 3% nanocapsule suspension concentrate were 28.98% and 19.79% higher than that of abamectin 3% EC at 100 days after treatment using flood irrigation and soil mixing methods, respectively. Therefore, abamectin nano-formulations can enhance its mobility in soil and improve the control effect on cucumber root-knot nematode. This study provides a reference for the development of nano-pesticide preparations suitable for soil application. [ABSTRACT FROM AUTHOR]

Copyright of Natural Gas Industry is the property of Natural Gas Industry Journal Agency and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of South China University of Technology (Natural Science Edition) is the property of South China University of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Rural Water & Hydropower is the property of China Rural Water & Hydropower Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The structure of a reverse flow combustor is more complicated than that of a straight flow combustor. To study the flow and combustion characteristics of the reverse flow combustor， planar particle image velocimetry （PIV） is used to measure the cold flow field， and the flame structure and propagation process are obtained by means of spontaneous chemiluminescence signals. It is found that the flow field of the reverse flow combustor is not symmetrical， and the velocity distributions near the inner and outer walls are different. In addition， the total change has little effect on the flow field structure of the combustor， but the velocity magnitude increases with the increase of the total pressure loss. Most combustion takes place in the primary combustion zone and the middle zone， and the flame burns out in a certain crescent shape. The ignition process of combustor has been divided into four stages， including the flame nucleation generation stage， the flame nucleation development stage， the successful ignition stage and the flame stabilization stage. It is shown that the ignition of the toroidal recirculation zone is the key to a successful ignition. During the blowout process， the flame core approaches the back of the toroidal recirculation zone， and the root of flame gradually moves away from the exit of the swirler， and the flame evolves from the crescent-shaped structure during the normal combustion to a single flame. [ABSTRACT FROM AUTHOR]

Objective The field effect evaluation technology of corrosion inhibitor in sour gas field is formed by gas field water analysis and field corrosion monitoring/detection, etc. Methods The effectiveness of residual concentration analysis of corrosion inhibitor, ultrasonic thickness measurement and electrochemical probe was investigated in the laboratory. Results The results show that the R~2 value of the residual mass concentration of corrosion inhibitor curve is more than 99.9%, the highest relative error of the ultrasonic test result is 0.67%, the electrochemical probe is a sensitive method to evaluate the corrosion inhibitor. Conclusions The field effect evaluation technology of corrosion inhibitor was applied in a raw gas pipeline in Long wangmiao gas reservoir. The results show this technology can effectively evaluate the field anti-corrosion effect of corrosion inhibitor, and the evaluation results are consistent with the field corrosion detection results. [ABSTRACT FROM AUTHOR]

This paper summarizes some literatures, introduces the basic concept and characterization methods of microemulsion, as well as the indoor oil displacement experiments and field application effects of microemulsion flooding at home and abroad; the future development and application of microemulsion flooding are prospected. [ABSTRACT FROM AUTHOR]

Copyright of New Building Materials / Xinxing Jianzhu Cailiao is the property of New Building Materials Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Electric Machines & Control / Dianji Yu Kongzhi Xuebao is the property of Electric Machines & Control and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The theory and practice of artificial cultivation are based on the environmental regulation of the secondary metabolism of medicinal plants. However, so far, the research on the accumulation effect of short-term ultraviolet radiation on the medicinally active ingredients was still relatively weak. In this study, the light environment-sensitive plant Dictamnus dasycarpus was taken as the research object, and the inductive effect of short-term enhanced ultraviolet radiation(UV)on four active ingredients, obacunone, fraxinellone, dictamnine, and limonin in the roots, stems, and leaves of D. dasycarpus was explored. The results were as follows:(1)Under whether low- or medium-intensity UV-A and UV-B radiation conditions, the maximum quantum yield of photosystem Ⅱ(Fv/Fm)of D. dasycarpus was always over 0.76 during the experimental period; Compared with the control(without ultraviolet radiation enhancement treatment), there was no significant differences in the actual photosynthetic quantum yield of photosystem Ⅱ Y(Ⅱ), regulated energy dissipation quantum yield Y(NPQ), photochemical quenching coefficient based “lake model”(qL)and the non-photochemical quenching coefficient(NPQ); Low- and moderate-intensity UV-B radiation significantly promoted the increase of non-regulated energy dissipation quantum yield Y(NO)of D. dasycarpus.(2)An appropriate enhanced amount of short-term ultraviolet radiation could promote the rapid accumulation of the active ingredients of D. dasycarpus, the four active ingredients in the roots could be increased by up to 51%, the accumulation was mainly in the D. dasycarpus roots. The effects of moderate intensity UV-A radiation and lower intensity UV-B radiation were the most obvious, and it not only promoted the accumulation of four active ingredients of obacunone, fraxinellone, dictamnine, and limonin in the roots, but also promoted the accumulation of dictamnine in the stems and fraxinellone in the leaves. The results reveal that the effectiveness of the accumulation of active ingredients in D. dasycarpus is improved under short-term enhanced ultraviolet radiation conditions. It also reveals that an effective way to improve the tolerance of the D. dasycarpus to light intensity and promote the accumulation of active ingredients is to increase the non-photochemical efficiency of the D. dasycarpus photosynthetic system. [ABSTRACT FROM AUTHOR]

【Objective】The present paper aimed to analyze the blocking effect of different blocking inhibitors on cadmium（Cd） and arsenic（As） in heavy metal contaminated rice fields and their effect on the yield of different varieties of rice, in order to provide a reference basis for the screening of rice varieties with low accumulation of heavy metals and the production of safe rice.【Method】Using the field test method, 16 Guangxi main planted late rice varieties were planted in the soil with high risk of heavy metal pollution, and two kinds of inhibitors, selenium-inhibitor and silicon-inhibitor, were tested for heavy metal control. The Cd and As contents in the rice samples of each variety were measured, and the blocking effects of different blocking agents on Cd and As and the yields of different varieties of rice were compared and analyzed.【Result】The Cd and As contents of the 16 rice varieties differed significantly, among which five varieties, namely, Shenliangyou 8386,Guang 8 you jinzhan, Fengtianyou 553,Guixiang 12 and Guang 8 you 169,had lower Cd enrichment ability, and four varieties, namely, Yexiangyou 703,Hengfengyou 666,Guang 8 you jinzhan and Yexiangyou lisi, had lower As enrichment ability. The yield of each rice variety sprayed with selenium-inhibitor and silicon-inhibitor was significantly improved, with an average yield increase of 6.5% and 5.4%,respectively, compared with the control（CK）. After spraying selenium-inhibitor and silica-inhibitor, the Cd content of rice of 16 rice varieties was lower than 0.200 mg/kg, and the average content was 0.119 and 0.125 mg/kg, respectively, which were significantly lower than that of CK（0.189 mg/kg）. The average contents were 0.119 and 0.125 mg/kg, which were 37.03% and 33.33% lower than those of CK（P<0.05）. The mean As contents of rice were 0.197 and 0.185 mg/kg, respectively, which were not significantly different（P>0.05） compared to CK（0.186 mg/kg）.【Conclusion】The test results show that there are significant differences in the adsorption capacity of different late rice varieties of rice for heavy metals Cd and As.Foliar spraying of selenium and silicon inhibitors in Cd-contaminated rice fields can significantly improve rice yield and also significantly reduce the Cd content of rice, but has no significant effect on reducing the As content of rice. The five low Cd accumulation rice varieties, namely Shenliangyou 8386,Guang 8 you jinzhan, Fengtianyou 553,Guixiang 12 and Guang 8 you 169,can be promoted and planted in local Cd contaminated rice fields, and the four low As accumulation rice varieties, namely Yexiangyou 703,Hengfengyou 666,Guang 8 you jinzhan and Yexiangyou lisi, can be promoted and planted in local As contaminated rice fields. [ABSTRACT FROM AUTHOR]

The ladle capacity expansion schemes with thinned permanent layers and working layers were numerically simulated and analyzed, and the temperature field change was researched. Thinning the permanent layer increases the heat dissipation loss of ladles, which has little effect on the temperature field and slag corrosion of refractories for the working layer of ladle walls. When thinning both the permanent layer and the working layer, the temperature of the working layer in the ladle wall area changes slightly, which has no significant impact on the service life; in the slag line area of ladles, the temperature rises and the slag corrosion intensifies in the steel holding stage; and the temperature has a large gradient during cooling, sharpening the thermal shock, thus easily leading to spalling. For ladle capacity expansion, to give consideration to both the heat dissipation and the ladle lining life, the thickness of precast blocks for the permanent layer and the working layer of ladle walls is reduced by 30 mm respectively, and the magnesia carbon bricks for slag line are subject to minor repairs, medium repairs and timely maintenance to achieve the overhaul cycle. The industrial test results show that: after ladle capacity expansion, the average molten steel capacity of ladles increases from 200 to 218 t; and under the smelting requirements of a high steel scrap ratio, the molten steel capacity of ladles can reach 220 t. [ABSTRACT FROM AUTHOR]

Objective Improve the production management level of beneficial wells in CO2 flooding pilot test area of an oilfield in Yan' an area, better and systematically evaluate the implementation effect of CO2 flooding pilot test. Methods A set of intelligent oil well metering device is developed by adopting a vertical double-volume metering structure, designed a pressure balance tube, applying GN704 new oleophobic and hydrophobic material, and integrating CO2 gas and water analyzer, gas flowmeter and other equipment. Results The field test results show that the measurement error of liquid production is less than 4%, the measurement error of water content is less than 4%, and the measurement error of associated gas is less than 7%. Conclusions The device has a compact structure and a good gas-liquid separation effect, which can realize the three-phase measurement of oil, gas and water in a single well and the analysis of CO2 content in associated gas, and also can effectively solve the problem of the impact of crude oil hanging on the measurement accuracy in winter. It is of great significance to the application effect evaluation and field popularization of CO2-EOR technology. [ABSTRACT FROM AUTHOR]

Objective The influence of particle image velocimetry (PIV) tracer particle addition method on pipeline flow field was discussed to find the most suitable addition method. Methods Compare three ways of filling tracer particles: single-tube, multi-tube and L-tube, and adopt the research method of combining numerical simulation and experiment. Results Through comparison, it can be seen that the tracer particles injected into I: tube have little effect on the flow field at each flow rate. However, the distribution of particles in the pipe is very uneven, and almost all of them are concentrated in the middle of the pipe. In addition, the disturbance of multi-tube filling tracer particles in the convective field is similar to that in other ways. Conclusions The tracer particles of I: pipe are concentrated in the middle of the pipe, which is not conducive to the flow pattern measurement of the whole pipe section of PIV. The tracer particle distribution of multi-tube filling is the most uniform, which is the best filling method. [ABSTRACT FROM AUTHOR]