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目的: 探讨三七总皂甙对提高切断视神经后节细胞存活的作用。方法: 用荧光素逆行示踪标记法和定量解剖学 技术观察正常和经三七总皂甙处理的动物于切断视神经 5、7、14 d 后视网膜节细胞的密度。结果:①正常视网膜节细胞平均 密度为( 2 007±115) /mm2 ; ②切断视神经 5、7、14 d后其视网膜节细胞平均密度分别下降至: ( 1 198±107) /mm2,( 825±40) / mm2 和( 196±10) /mm2 ; ③给予生理盐水的对照组在上述各时间组视网膜节细胞平均密度与单纯切断视神经组结果相似; ④ 给予三七总皂甙的实验组在 5、7、14 d 视网膜节细胞的平均密度分别为( 1 461±96) /mm2 ; ( 1064±91) /mm2)和( 302±19) / mm2 ,与切断视神经组和生理盐水对照组相比在各时间组上均存在显著性差异(P

Copyright of Chinese Journal of Tissue Engineering Research / Zhongguo Zuzhi Gongcheng Yanjiu is the property of Chinese Journal of Tissue Engineering Research 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 Food & Fermentation Industries is the property of Food & Fermentation Industries 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 Biomass Chemical Engineering is the property of Editorial Office of Biomass Chemical 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 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.)

Objective To evaluate the role of autophagy in the treatment of neuropathic pain (NP) with hydrogen-rich saline. Methods Forty adult male Sprague-Dawley rats with successful intubation were randomly divided into 5 groups (n= 8) using a random number table: the sham operation group (group S), the neuropathic pain group (group C), the hydrogenrich saline group (group H), the autophagy inhibitor group (group M) and the hydrogen-rich saline + autophagy inhibitor group (group HM). There were 8 rats in each group. The NP model was established by chronic constriction of the sciatic nerve (CCI) in rats. The autophagy inhibitor 3-methyladenine (3-MA) was intraperitoneally injected with 30µg/kg in the group M and the group HM. The hydrogen-rich saline (0.6 mmol/L) was intraperitoneally injected with 10 mL/kg in the group H and the group HM. The other groups were intraperitoneally injected with the same amount of normal saline twice a day for 7 consecutive days. Paw withdrawal threshold to mechanical stimulation (MWT) and paw withdrawal latency to thermal stimulation (TWL) were measured at 1 day before and 1, 3, 5, 7 and 14 days after modeling (T0-T5). After the last measurement of pain threshold, the L4-L6 segment of spinal cord was removed for determination of the expression of autophagy-related proteins microtubule-associated protein light chain 3 (LC3) Ⅱ, Beclin-1 and p62 proteins by Western blot assay. The expression levels of superoxide dismutase (SOD) and malondialdehyde (MDA) in spinal cord tissue were detected. Results Compared with the group S, MWT and TWL were decreased in the group C at T2-5, the expression levels of LC3 Ⅱ, Beclin-1 and p62 were increased, SOD activity was decreased, and MDA content was increased at T5 (P＜0.05). Compared with the group C, MWT and TWL were increased in the group H at T2-5, LC3 Ⅱ and Beclin-1 protein expression levels were increased, p62 protein expression levels were decreased, SOD activity was increased, and MDA content was decreased at T5 (P＜0.05). MWT and TWL were decreased in the group M at T2-5, LC3 Ⅱ and Beclin-1 protein expression levels were decreased, p62 protein expression levels were increased, SOD activity was decreased, and MDA content was increased at T5 (P＜0.05). Compared with the group M, MWT and TWL were increased in the group HM at T2-5, LC3 Ⅱ and Beclin-1 protein expression levels were increased, p62 protein expression levels were decreased, SOD activity was increased, and MDA content was decreased at T5 (P＜0.05). Conclusion Hydrogen-rich saline can alleviate neuropathic pain and inhibit oxidative stress in spinal cord in rats, and the mechanism may be related to the increase of autophagy. [ABSTRACT FROM AUTHOR]

Copyright of China Fiber Inspection is the property of China Fiber Inspection 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 Shipin Kexue/ Food Science is the property of Food Science 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 Shipin Kexue/ Food Science is the property of Food Science 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 Food & Machinery is the property of Food & Machinery 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 Chinese Journal of Immunology is the property of Medical Periodical Society of Jilin 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 Shandong Medical Journal is the property of Shandong Medical Health Newspapers 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 Engineering Mechanics / Gongcheng Lixue is the property of Engineering Mechanics 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.)

The experiment was conducted to investigate the effect of shikimic acid on growth performance, diarrhea index, serum immunity and antioxidant indicators of piglets infected with porcine epidemic diarrhea virus (PEDV). A total of 120 clinically confirmed PEDV infected seven-day-old piglets (Duroc × Landrace × Yorkshire) were randomly divided into six groups, with five replicates in each group and four pigs in each replicate. Treatment group 1, group 2 and group 3 were administered 800, 400 and 200 mg/kg of shikimic acid daily to piglets infected with PEDV, treatment group 4 were treated with daily administration of 400 mg/kg chlorogenic acid to piglets infected with PEDV, treatment group 5 were treated with 20 000 units of gentamicin per day to piglets infected with PEDV, treatment group 6 were treated as positive control groups, and another 20 healthy piglets were selected as the blank control group. The experiment lasted for 5 d, and then observed for 3 d. The results showed that compared with control group with positive PEDV infection, the ADG of piglets with treatment group 1, group 2 and group 3 was significantly increased (P<0.05). The cure rate of PEDV infection in treatment group 1 and group 2 reached 85%, and the cure rate in treatment group 5 was 65%. The IgG content in the serum of piglets in group 1, group 2 and group 3 was significantly increased (P<0.05). The activity of SOD, CAT, NO, MPO, GSH-Px and T-AOC in the serum of piglets in group 1, group 2 and group 3 were significantly increased (P<0.05), and the content of MDA and XOD was significantly reduced (P<0.05). The experiment indicates that shikimic acid can improve the growth performance of piglets, reduce diarrhea index, enhance immunity and serum antioxidant capacity, and have a disease resistance and growth promoting effect on PEDV infected piglets. [ABSTRACT FROM AUTHOR]

Copyright of Application Research of Computers / Jisuanji Yingyong Yanjiu is the property of Application Research of Computers Edition 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.)

Pollution of water resources is seriously endangering human health. Bismuth-based photocatalytic materials also show great potential in controlling organic pollution, with the advantages of green, efficient, clean and low cost. This paper briefly introduces the research progress of various bismuth-based photocatalytic materials in the degradation of organic wastewater, summarizes the modification methods of various bismuth-based photocatalysts and the degradation effects of various organic pollutants, and analyzes the factors affecting the efficiency of bismuth-based photocatalytic materials in the degradation of organic compounds in water. The future development of photocatalysis in the degradation of organic wastewater was also explored, and several proposals for the development of bismuth-based photocatalysis materials were presented. [ABSTRACT FROM AUTHOR]

Copyright of Chinese Mental Health Journal / Zhongguo Xinli Weisheng Zazhi is the property of Chinese Mental Health Journal 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 Functional Materials / Gongneng Cailiao is the property of Chongqing Functional Materials Periodical Press 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 Chinese Journal of Computational Mechanics / Jisuan Lixue Xuebao is the property of Chinese Journal of Computational Mechanics Editorial Office, Dalian 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 Chinese Journal of Applied Chemistry is the property of Chinese Journal of Applied Chemistry 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 Shipin Kexue/ Food Science is the property of Food Science 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 Technology Economics is the property of Chinese Society of Technology Economics 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 Electronic Components & Materials is the property of Electronic Components & Materials 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 Functional Materials / Gongneng Cailiao is the property of Chongqing Functional Materials Periodical Press 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.)

【Objective】According to the demand of scientific layout of cotton planting for climate change, the study used the species distribution model to quantitatively simulate the suitable distribution of cotton in Manas River basin and its possible response to future climate change, which helps understand the ecological suitability and environmental driving mechanism of cotton planting in arid basin.【Method】The study integrated GIS spatial analysis and MaxEnt model, using 61 cotton planting records and a total of 8 environmental factors screened by R software, and analyzed the suitable distribution range and spatial distribution characteristics of cotton in Manas River basin during the period of reference climate（1970-2000） and 2040 period（SSP245 scenario）. The contribution value of environmental factors, replacement importance value and jackknife method were used to quantitatively analyze the key environmental factors affecting cotton distribution. 【Result】（i） Under the reference climate, the moderate and the most suitable distribution areas of cotton accounted for 9.64% and 12.19% of the total area of the basin, mainly distributed in oasis area of 44°-45° north latitude, including 132, 133, 141 and 144 regiments in Shawan county, 149 and 150 regiments in Manas county, Jiahezi Reservoir and Yuejin Reservoir, and 136 regiment in Shihezi city, southern Kuytun city, northern Wusu city and northeast Karamay city;（ii）Mean diurnal range of temperature, soil pH and solar radiation were key factors affecting the suitable distribution of cotton in the basin, with a cumulative contribution rate of 74.4%. The value ranges of the three factors in the suitable distribution areas were 0.50-13.0 ℃, 5.7-8.7 and 1377-1530 KJ/（m².day）;（iii） Compared with the reference climate, the cotton suitable areas showed a significant trend of decreasing and increasing fragmentation during 2040 period, but the overall decreasing area accounted for 1.5% of the total area of the basin, and decreased to the southern and northwestern of the oasis area of Shawan county, the northeastern Karamay city, Manas county and the south edge of the oasis area of Kuytun city.【Conclusion】The results have great significance for scientific layout of crop planting and stable development in arid basin. [ABSTRACT FROM AUTHOR]

Copyright of Shipin Kexue/ Food Science is the property of Food Science 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 Shipin Kexue/ Food Science is the property of Food Science 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 Jilin University (Science Edition) / Jilin Daxue Xuebao (Lixue Ban) is the property of Zhongguo Xue shu qi Kan (Guang Pan Ban) Dian zi Za zhi She 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 Engineering Mechanics / Gongcheng Lixue is the property of Engineering Mechanics 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 Application Research of Computers / Jisuanji Yingyong Yanjiu is the property of Application Research of Computers Edition 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 South Architecture / Nanfang Jianzhu is the property of South Architecture 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 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.)

Copyright of Architectural Journal / Jian Zhu Xue Bao is the property of Architectural Journal 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 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.)

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The Pearl River Estuary is the core water area of the Greater Bay area of Guangdong, Hong Kong, and Macao. The river net of the Pearl River Delta is dense and staggered, and its sediment transport process is complex due to the influence of runoff and tides. While sediment transport is a key process in river evolution, it is directly related to the flood control water supply and shipping safety of the Greater Bay area. To investigate the extent of the effect of sediment transport on the Greater Bay area, we analyzed the inversion of water surface sediment under tidal action using in-situ data, high-frequency GF-4 satellite image data (including multi temporal images), water quality, and reflection spectrum data from December 28, 2019 and June 20, 2020. The Mean Absolute Percentage Error (MAPE) value for atmospheric correction was 18.85%. We built several sediment inversion models based on the near-infrared, red, and blue band ratio of the GF-4 satellite image data. The best suited models for the flood and dry seasons had MAPE errors of 30% and 23.54%, respectively. We further obtained the continuous dynamic monitoring results and the daily change of sediment transport in the Pearl River Estuary at an interval of 2 h. The high frequency remote sensing inversion results gave a clear picture of the overall sediment transport dynamics of the estuary. Compared with the in-situ sediment concentration, the inversion results were consistent with the variation of sediment concentration in the tidal cycle. Moreover, we analyzed the dynamic characteristics of sediment transport under the influence of runoff tide. We found that with the rising tide, the overall suspended sediment concentration in Lingding Bay decreased considerably, Lingding Bay is a trumpet shaped estuary located outside the Pearl River Estuary. The north area of Neilingding Island is affected by human activities, thus the riverbed is degraded owing to reduced sediment input and reduced sediment resuspension to the surface. This creates a large water area of low suspended sediment content under the rising tide. Under the ebb tide, water with high suspended sediment content diffuses into the Macau Coastal Waters along the west bank of Lingding Bay. However, the southeast sediment diffusion is restricted by the backwaters from the Humen ebb current. Our method provides a new approach for large-scale operational monitoring of sediment transport in complex estuaries; furthermore, it provides a new strategy of cross-validation between the numerical simulation and remote sensing monitoring of sediment transport. [ABSTRACT FROM AUTHOR]

Copyright of Imaging Science & Photochemistry is the property of Imaging Science & Photochemistry 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 Railway Investigation & Surveying is the property of Railway Investigation & Surveying 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 Engineering Mechanics / Gongcheng Lixue is the property of Engineering Mechanics 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.)

The experiment was to investigate the effect of dietary supplementation of functional fiber and precision feeding on reproductive performance of sows during pregnancy. A total of 300 parturients sows were randomly divided into three groups with 100 replicates in each group and one pig in each replicate: control group, experiment group Ⅰ and experiment group Ⅱ. During pregnancy, sows in control group were fed with basal diet in the 'high-low-high' mode. Sows in experimental group Ⅰ were fed with modified formula diet + 1% functional fiber in 'high-low-high' mode. Sows in experimental group Ⅱ were fed with modified diet + 1% functional fiber, and the feeding amount was dynamically adjusted according to the body condition of sows. The experiment lasted for 157 d. The results showed that the constipation rate of each experiment group was significantly lower than that of control group (P<0.01). The backfat thickness of sows in experimental group was significantly lower than that of control group at 90 d of gestation and before delivery (P<0.01), and the backfat loss of sows in experimental group was significantly lower than that of control group at weaning (P<0.01). The number of live piglets, the number of healthy piglets, the birth weight of the piglets, the average number of weaned heads in each litter, the weight of the weaning litter and the seven-day weaning rate of each experimental group were significantly higher than those of control group (P<0.01). The days from weaning to mating in experimental group were significantly lower than those in control group (P<0.01). Compared with the control group, the feed input cost of sows in experimental group Ⅱ was the lowest, and the feed cost of the sows in experimental group Ⅱ was reduced by 1.24 yuan, and the benefit per litter was increased by 1 966.24 yuan. The studies indicates that the addition of functional fiber and precise feeding in gestational diets of sows can alleviate constipation, adjust the pregnancy, improve reproductive performance, reduce production costs, and increase economic benefits. [ABSTRACT FROM AUTHOR]

Copyright of Guangdong Architecture Civil Engineering is the property of Guangdong Architecture Civil Engineering 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 Chinese Journal of Tissue Engineering Research / Zhongguo Zuzhi Gongcheng Yanjiu is the property of Chinese Journal of Tissue Engineering Research 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.)

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Copyright of Journal Of Sichuan University (Natural Sciences Division) / Sichuan Daxue Xuebao-Ziran Kexueban is the property of Editorial Department of Journal of Sichuan University Natural Science Edition 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.)