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Copyright of Bulletin of Soil & Water Conservation is the property of Bulletin of Soil & Water Conservation 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 Inorganic Analytical Chemistry / Zhongguo Wuji Fenxi Huaxue is the property of Beijing Research Institute of Mining & Metallurgy Technology Group 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 Petroleum Refinery Engineering is the property of Petroleum Refinery 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 China Surfactant Detergent & Cosmetics (2097-2806) is the property of China Surfactant Detergent & Cosmetics 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 Research of Soil & Water Conservation is the property of Institute of Soil & Water Conservation, Chinese Academy of Sciences & Ministry of Water Resources 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 Northwest A & F University - Natural Science Edition is the property of Editorial Department of Journal of Northwest A&F 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.)

In order to reveal spatial and temporal variation characteristics of soil erosion in the upper reaches of Beiluo River watershed before and after the Grain for Green Project, the author used the revised universal soil loss equation（RUSLE) combined with GIS and RS technic to analyze the dynamic changes characteristics of soil erosion in the upper reaches of Beiluo River watershed before and after the Grain for Green Project from 1981 to 2010. The period from 1981 to 2010 was divided into three periods（1981-1990, 1991-2000 and 2001-2010）, which were numbered as I, Ⅱ and Ⅲ, respectively. The results show that a) the spatial distribution of soil erosion intensity in the upper reaches of Beiluo River watershed is higher in the northwest and lower in the southeast. During 1981 to 2010, the average soil erosion modulus of the watershed shows a continuous decreasing trend, especially after the Grain for Green Project, the soil erosion modulus is decreased significantly while the rainfall erosivity of the watershed shows a fluctuating increasing trend. The average annual soil erosion modulus of time period I, time period Ⅱ and time period Ⅲ is 8 612.62, 8 078.91 and 3 060.71 t/（km²·a), respectively. b) After the Grain for Green Project, the area of cultivated land in the watershed is decreased sharply, the area of woodland and grassland is increased significantly, and the vegetation coverage has increased greatly. The soil erosion modulus of main land use types follow the rule of cultivated land＞grassland＞woodland, that is, the soil erosion modulus is decreased with the increase of vegetation coverage. c) Soil erosion in the three periods is consistent with the distribution characteristics of the terrain. 1 350-1 550 m is the main elevation zone of soil erosion distribution in the watershed, which accounts for about 80% of the total erosion amount in the watershed, and 72% of the erosion amount is distributed in the slope＞15°. The average soil erosion modulus of different slope directions follow the pattern of sunny slope＞half-sunny slope＞half-shady slope＞shady slope. [ABSTRACT FROM AUTHOR]

Copyright of Bulletin of Soil & Water Conservation is the property of Bulletin of Soil & Water Conservation 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 Experimental Technology & Management is the property of Experimental Technology & Management 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 microscopically dynamic mechanism of electrochemical reaction on electrode-surfaces fails to uncover by isolated traditional electrochemical method. Nuclear magnetic resonance (NMR) technology provides the message of sample's chemical shift and the tiny split produced by J coupling at a molecular level, it can be easier to identify isomer, molecular construct and electronic change. Hence, in situ electrochemical NMR hyphenated technique (EC-NMR technique) permits to monitor the reaction pathway and dynamic mechanism of the electrochemical reactions nondestructively at a molecular level. It seems to be more performing technique to reveal the reaction mechanism, structure-function relationship, and to discover unstable chemical intermediates which the ex-situ technique will never be. However, for the incompatibility between electrochemical cells and NMR, the study and application of the in situ EC-NMR technique is relatively lack. In order to understand the new technique for much more people, the article explains the development aboard and at home of the EC-NMR technology, working principle, challenge, and application which in electrochemical catalysis, the reaction mechanisms, fuel cell, and medication research. Future key issues of EC-NMR technology are also predicted. [ABSTRACT FROM AUTHOR]

“Grain for Green” program has been implemented in the Loess Plateau of China since 1999, in order to control excessive soil erosion and sediment production. There is a profound impact on the vegetation cover and land use structure in recent years. It is a high demand to analyze the potential of vegetation restoration, plantation suitability areas, and land use change for regional ecosystem restoration planning and ecological protection. Taking the Beiluo River Basin as an example, this work aims to clarify the potential of vegetation restoration, vegetation suitability area, and land use change in various geomorphological areas using the dataset of climate, geography, vegetation cover, and land use. The “similar habitat” was also introduced for the statistical and geographical spatial analysis. Results showed that: 1) The spatial distribution of vegetation cover varied significantly in the study area in 2020. The vegetation cover of the earth-rock mountain area was the highest at 88.8%, followed by the gully area at 84.1%, and the terrace plain area and hilly-gully area at 68.9% and 61.9%, respectively. A spatial distribution pattern of vegetation restoration potential was obtained with the “high in the northwest and low in the southeast”, particularly in the hilly-gully area in the upper reaches. The maximum recoverable vegetation cover of the hilly-gully area was 71.1%, where still 9.2% potential for the vegetation cover and the vegetation of 36.4% of the area continued to improve in the next 20-30 years. By contrast, the area with the vegetation to be improved accounted for about 11.5% of the earth-rock mountain area. The maximum recovery potential was achieved in the vegetation cover in the gully and terrace plain areas after 20 years of restoration. Therefore, there was no room to improve in the future. 2) The current land use types were dominated by cropland, forestland and grassland. The land use predictions showed that the land use change was mainly concentrated in the hilly-gully area in the next 20-30 years. The cropland decreased by 47.4% in the hilly-gully area, compared with 2020. The forestland and grassland increased by 0.7% and 15.8%, respectively. Since the cropland decreased by 23.0%, the forestland and grassland increased by 0.2% and 36.0%, respectively, in the earth-rock mountain area. Conversely, there was only a slight change in the future land use in the gully and terrace plain area. 3) The scenarios simulation was conducted to determine the plantation’s suitability using the principle of “Matching Tree Species with Site”. The suitable planting area in the gully and terrace plain area was 279.16 and 233.73 km2, respectively. A large area of returned cropland in the hilly-gully area was suitable for the natural restoration. There was relatively sporadic suitability for the planting area in the hilly-gully and earth-rock mountain areas. It implied that the hilly-gully area was the key area for future ecological restoration, which was the hotspot for ecological protection and high-quality development in the Yellow River Basin. Considering the limited rainfall and water carrying capacity, the ecological measures of “adaptation to local conditions” were proposed to avoid soil drying for future vegetation restoration in the Loess Plateau. [ABSTRACT FROM AUTHOR]

Copyright of Packaging & Food Machinery is the property of Packaging & Food Machinery Magazine 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 Bulletin of Soil & Water Conservation is the property of Bulletin of Soil & Water Conservation 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.)

Objective: To investigate the expression and correlation of tyrosine phosphatase Z1 receptor (ptprz1), cyclooxygenase-2 (COX-2) and human telomerase reverse transcriptase (hTERT) in oral submucosal fibrocarcinogenesis. Methods: From June 2018 to June 2019, 30 cases of oral submucous fibrotic canceration (OSFC) tissue from the patients who were treated in Liyuan Hospital were collected as OSFC group; 30 cases of oral submucous fibrotic (OSF) tissue from the patients who were treated in Liyuan Hospital were collected as OSF group; at the same time, 30 cases of normal oral mucosa, without betel nut and tobacco and alcohol addiction, were taken as normal group. Western blot was used to detect the relative expression of PTPRZ1 and hTERT; enzyme-linked immunosorbent assay was used to detect the expression of COX-2; immunohistochemistry was used to detect the samples. The correlation among PTPRZ1, COX-2 and hTERT in the oral submucous fibrotic canceration was analyzed. Results: The relative expression of PTPRZ1, COX-2 and hTERT in OSF group was higher than that in normal group (P < 0.05); the relative expression of PTPRZ1, COX-2 and hTERT in OSFC group was higher than that in normal group and OSF group (P < 0.05). The relative expression of PTPRZ1, COX-2 and hTERT in poorly differentiated oral submucous fibrogenic carcinoma was higher than that in well differentiated and moderately differentiated oral submucous fibrogenic carcinoma (P < 0.05). The relative expression of PTPRZ1, COX-2 and hTERT in stage Ⅳ oral submucous fibrogenic carcinoma was higher than that in stage Ⅱ and Ⅲ oral submucous fibrogenic carcinoma (P < 0.05). The relative expression of PTPRZ1, COX-2 and hTERT was positively correlated in oral submucous fibrocarcinogenesis. Conclusion: PTPRZ1, COX-2, and hTERT were abnormally high expressed in the oral submucous fibrocarcinogenesis; PTPRZ1, COX-2, and hTERT were high expressed in the oral submucous fibrocarcinogenesis with low differentiation and high pathological stage, and PTPRZ1, COX-2, hTERT were positively correlated in the oral submucous fibrocarcinogenesis. [ABSTRACT FROM AUTHOR]

目的 观察病程≥10年的2型糖尿病（T2DM）患者泪腺功能及形态变化情况。方法 选取眼科门诊患者， 其中T2DM组（2型糖尿病患者，≥10年病程）53例、106眼，对照组（非糖尿病患者）51例、102眼。对患者进行OSDI问 卷调查，泪液分泌试验（SIT）检测泪液分泌情况。采集眼眶轴位CT图像，于泪腺最大截面层面测量泪腺的长径、宽 径及截面积，比较 T2DM组与对照组以及 T2DM组男性与女性、左侧与右侧泪腺大小的差异。结果 T2DM组和对 照组的 OSDI 问卷评分分别为（18. 77 ± 6. 87）、（10. 61 ± 5. 59）分，SIT 分别为（6. 85 ± 3. 54）、（12. 56 ± 4. 16）mm/ 5 min，T2DM 组 OSDI问卷评分高于对照组、SIT低于对照组（P均<0. 01）。T2DM 组泪腺长径为（15. 89 ± 2. 63）mm、 宽径为（5. 21 ± 1. 25）mm、横断面面积为（59. 53 ± 17. 71）mm2 ，对照组分别为（16. 88 ± 1. 56）mm、（5. 71 ± 0. 95）mm、 （70. 48 ± 17. 51）mm2 ，T2DM组长径、宽径、横断面面积均小于对照组（P均<0. 01）。T2DM组中，男性与女性、左侧与 右侧泪腺大小比较差异均无统计学意义（P均>0. 05）。结论 病程≥10年的2型糖尿病患者泪液分泌明显减少，泪 腺明显变小. [ABSTRACT FROM AUTHOR]

Copyright of Yellow River is the property of Editorial Board of Yellow River 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.)

Ｔａｋｉｎｇ ｔｈｅ Ｂｅｉｌｕｏ ｒｉｖｅｒ ｂａｓｉｎ ａｓ ａｎ ｅｘａｍｐｌｅ, ｔｈｅ Ｌａｎｄｓａｔ ＴＭ ｉｍａｇｅ ｄａｔａ ｉｎ １９９５, ２００７ ａｎｄ ２０１４ ｗｅｒｅ ｅｍｐｌｏｙｅｄ ａｎｄ ｔｈｅ ｖｅｇｅｔａｔｉｏｎ ｃｏｖｅｒａｇｅ ｗａｓ ｄｅｒｉｖｅｄ ｔｏ ａｎａｌｙｚｅ ｈｏｗ ｔｈｅ ｖｅｇｅｔａｔｉｏｎ ｒｅｓｔｏｒｅｄ. Ｔｈｅ ｒｅｓｕｌｔｓ ｓｈｏｗｅｄ ｔｈａｔ ｔｈｅ ａｖｅｒａｇｅ ｖｅｇｅｔａｔｉｏｎ ｃｏｖｅｒａｇｅ ｉｎ ｔｈｅ ｔｈｒｅｅ ｙｅａｒｓ ｏｆ ｔｈｅ ｗｈｏｌｅ ｂａｓｉｎ ａｒｅ ４６. ４３％, ６３. ４２％, ａｎｄ ７３. ４％, ｒｅｓｐｅｃｔｉｖｅｌｙ. Ｔｈｅ ｔｒｅｎｄｓ ｏｆ ｖｅｇｅｔａｔｉｏｎ ｄｉｓｔｒｉｂｕｔｉｏｎ ｏｎ ｌａｎｄｆｏｒｍ ｗｅｒｅ ａｎａｌｙｚｅｄ ｉｎ ｔｈｅ ｕｐｐｅｒ ｒｅａｃｈｅｓ ｏｆ ｔｈｅ ｂａｓｉｎ. Ｉｔ ｉｓ ｓｈｏｗｅｄ ｔｈａｔ ｗｈａｔｅｖｅｒ ｔｈｅ ｅｌｅｖａｔｉｏｎ ｂｅｌｔｓ, ｓｌｏｐｅ ｇｒａｄｉｅｎｔ ｓｐａｎｓ, ａｎｄ ｓｌｏｐｅ ａｓｐｅｃｔ ｚｏｎｅｓ ｗｅｒｅ, ｔｈｅ ｖｅｇｅｔａｔｉｏｎ ｃｏｖｅｒａｇｅ ｉｍｐｒｏｖｅｄ ｄｉｓｔｉｎｃｔｉｖｅｌｙ ｉｎ １９９５, ２００７ ａｎｄ ２０１４. Ｍｅａｎｗｈｉｌｅ, ｔｈｅ ｅｘｔｅｎｔ ｏｒ ｔｈｅ ａｒｅａ ｏｆ ｌｏｗ ｖｅｇｅｔａｔｉｏｎ ｃｏｖｅｒａｇｅ ｔｒａｎｓｆｏｒｍｉｎｇ ｔｏ ｈｉｇｈ ｖｅｇｅｔａｔｉｏｎ ｃｏｖｅｒａｇｅ ｔｅｎｄｓ ｔｏ ｂｅ ｇｒｅａｔｅｒ ｗｉｔｈ ｔｈｅ ｅｌｅｖａｔｉｏｎ ｌｏｗｅｒ, ｓｌｏｐｅ ｇｒａｄｉｅｎｔ ｌａｒｇｅｒ, ａｎｄ ｓｌｏｐｅ ａｓｐｅｃｔ ｉｎｃｌｉｎｉｎｇ ｔｏ ｂｅ ｓｈａｄｙ. [ABSTRACT FROM AUTHOR]

Objective To observe the effect of sphingosine-1-phosphate （SIP） on epithelial-myofibroblast transition （EMT） of alveolar type Ⅱ epithelial cells. Methods A549 cells were exposed to different concentrations of methanol-insolube SIP (0, 10-8, 10-7, 10-6 and 10-5 mol/L) for 72 hours, then the morphology was observe by inverted microscope. A549 cells were also treated with S1P(10-5 mol/L) at different time points （0, 12, 24, 48 and 72 h）, then the involved protein and mRNA expression was detected by Western blotting and RT-PCR, respectively. Meanwhile, we set S1P （0 mol/L, 0 h） as the control group and took other concentrations and other time points as the observation groups. Results For the observation groups, morphological changes in A549 cells began at the concentration of 10-7 mol/L, which induced more fibroblast-like morphology with loosened cell-cell connection. For the control group, it represented typical epithelial oval morphology with tightly cell-cell connection. The expression of E-cadherin （protein and mRNA） significantly decreased, and the expression of α-SMA, fibronectin （FN）（protein and mRNA） significantly increased in A549 cells treated with SIP for 48,72 h as compared with that of the control group （all P <0.05, or all P <0.01）, which was in a time-dependent manner. Conclusion S1P may induce the EMT of alveolar type II cells and plays an important role in the formation of pulmonary interstitial fibrosis. [ABSTRACT FROM AUTHOR]

The life and reliability of integrated transmission device may be significantly affected by the vibration, harshness and quality of the device. The relationship between the internal excitation and vibration of the device is one of the important research works. An experimental scheme is presented to obtain the relationship between the internal excitation and vibrations of an integrated transmission device. A coupling signal analysis method is also proposed to investigate the signals from the multiple measurement points and experimental conditions. The relationship between the internal excitation and vibration of the device is obtained based on the proposed experimental method, which can provide some guidance for the structure optimization of the device. The results show that the experimental analysis method can be used to not only determine the vibration source location of the integrated transmission device, but also find the dominant frequency which should be controled, which can provide some guidance for the structure optimization of the device. [ABSTRACT FROM AUTHOR]

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.)