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为了使植物油中脂溶性维生素E异构体得到更好的分离，建立一种超高效合相色谱（UPC2）快速分离和测定植物油中维生素A和维生素E的方法。样品经异丙醇溶解，过0.22 μm有机相滤膜后直接进样分析。分析条件为HSS C18 SB色谱柱（3.0 mm×100 mm,1.8 μm），CO2和0.2%甲酸甲醇溶液为流动相，梯度洗脱，流速1.0 mL/min，柱温50 ℃，检测波长290 nm。结果表明：维生素A和维生素E在测定范围内呈现良好的线性关系，相关系数均在0.999 5及以上，样品回收率为82.00%～106.82%，RSD在0.94%～3.57%之间，日内精密度与日间精密度的RSD分别为1.94%～3.51%与3.74%～5.13%，并采用已建立的方法对26份植物油样品中的维生素A和维生素E含量进行测定，表明植物油中维生素E含量最高，其中以α-生育酚和γ-生育酚为主，β-生育酚含量较低。该方法简单高效、灵敏度高、重复性好，可用于植物油中脂溶性维生素A和维生素E的分离检测。 In order to better separate the fat-soluble vitamin E isomers in vegetable oils, a method for rapid separation and determination of vitamin A and vitamin E in vegetable oil by ultra high performance convergence chromatography was established. The sample was dissolved in isopropanol and passed through a 0.22 μm organic phase filter membrane, and then directly injected for analysis. The analysis conditions were as follows: HSS C18 SB chromatographic column (3.0 mm×100 mm, 1.8 μm), with CO2 and 0.2% formic acid methanol solution as mobile phase, gradient elution, flow rate 1.0 mL/min, column temperature 50 ℃, detection wavelength 290 nm. The results showed that vitamin A and vitamin E showed a good linear relationships in the determination range, the correlation coefficients were not less than 0.999 5, the sample recovery was 82.00%-106.82%, the RSD was 0.94%-3.57%, and the RSD of intraday precision and daytime precision were 1.94%-3.51% and 3.74%-5.13%, respectively. The contents of vitamin A and vitamin E in 26 vegetable oil samples were determined by the established method. The vitamin E content was the highest, in which α-tocopherol and γ-tocopherol was the main tocopherol, while β-tocopherol conternt was lower. The method is simple, efficient, sensitive and reproducible. The method can be used for the separation and determination of vitamin A and vitamin E in vegetable oil.

Copyright of Journal of Beijing Institute of Civil Engineering & Architecture is the property of Journal of Beijing University of Civil Engineering & 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 Journal of Agricultural Resources & Environment / Nongye Ziyuan yu Huanjing Xuebao is the property of Journal of Agricultural Resources & Environment Editorial Board 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 Geology & Exploration is the property of Geology & Exploration 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 transformation of agricultural scientific and technological achievements is different because of different management modes and achievement types. Based on typical cases of scientific and technological innovation and achievement transformation in transformed institutes, we analyzed the mode and problems of transformation of scientific and technological achievements in enterprises. The methods were also proposed to solve these problems. [ABSTRACT FROM AUTHOR]

Objective To investigate the role of long non-coding RNA family with sequence similarity 83 member A antisense RNA 1 in retinoblastoma （RB） cells and its potential molecular mechanism. Methods RB cells were cultured in vitro, and Vector, pcDNA-FAM83A-AS1, NC-siRNA, and FAM83A-AS1-siRNA were transfected into cells to detect the expression of FAM83A-AS1, RB cell proliferation ability, and apoptosis rate in RB cells. Bioinformatics and dual-luciferase reporter gene experiments were performed to predict and verify the targeting relationship between FAM83A-AS1 and miR-150, and miR-150 and the high-mobility family protein A2 （HMGA 2）. The expression of miR-150 and HMGA2 mRNA in RB cells was measured by RT-qPCR； HMGA 2 protein in RB cells by Western blot； and the proliferation and apoptotic capacity of RB cells after transfection by MTT assay and flow cytometry. Results The expression of FAM83A-AS1 in the pcDNA-FAM83A-AS1 group was significantly higher than that of the Vector group and lower than that of the NC-siRNA group （P < 0.05）. The cell proliferation capacity in the pcDNA-FAM83A-AS1 group was significantly higher, and the apoptosis rate was significantly lower （P < 0.05）. Compared with NC-siRNA group, FAM83A-AS1-siRNA group showed significantly increased apoptosis rate （P < 0.05）. The miR-150 mimic significantly inhibited the proliferation capacity of RB cells and promoted cell apoptosis. However, pcDNA-HMGA 2 significantly reversed the effect of miR-150 mimic on the proliferation and apoptosis of RB cells. Conclusion Knockdown of lncRNA FAM83A-AS1 inhibited RB cell proliferation and promoted apoptosis by regulating the miR-150/HMGA2 axis. [ABSTRACT FROM AUTHOR]

Copyright of Inorganic Chemicals Industry is the property of Editorial Office of Inorganic Chemicals Industry 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 water-fertilizer (NP) coupling field experiment for oilseed sunflower was conducted in the drought of middle ningxia under the condition of drip irrigation by “312-D”saturation optimum design. The regressive maths model was set up based on the oilseed sunflower yield. Analysis showed that the effects among these factors were positive on the oilseed sunflower yield with the influenced order as water>N>P, interaction effects influenced order as N and water>NP>P and water, and P and water was negative. The optimum dosage combinations of water-fertilizer coupling: the dosage of N were 248. 03 kg / hm², P2O5 were 104. 06 kg / hm², K2O 60 kg / hm², irrigation was 888. 05 m³ / hm². Yield reached 4 918. 15 kg / hm², than local yield and income of oilseed sunflower increased by 29. 4% and 5 287 yuan / hm². [ABSTRACT FROM AUTHOR]

Main functional zone (MFZ) planning is one of the most important national strategies in economic development and ecological environment protection. It is very necessary to analyze the evolution characteristics of territorial space patterns and the carbon emission in the MFZ system. This study aims to determine the spatial and temporal evolution of territorial spatial patterns in the Yangtze River Delta region before and after the MFZ implementation using the land use data from 2000 to 2020. The spatial transfer of territorial space was then evaluated using carbon emission data and contribution rate analysis. The results show that: 1) Urban and ecological space continued to increase, whereas, the agricultural space decreased in the study area. The agricultural main production, the optimized and the key development zones were dominated by the transfer of agricultural production space, while the ecological function zone was dominated by the mutual conversion of forest ecological space and agricultural production space. The rate of change in the territorial space tended to slow down after the MFZ implementation. 2) Agricultural production space was the main type of transfer out, whereas, the transfer in was the agricultural living space, urban living space, and urban production space. There was a negative correlation between the increase and decrease in the number of spatial changes in the territory within each MFZ, indicating the significant spatial heterogeneity. 3) Net carbon emissions decreased (in C units) by 14 956.57 kg/(m² ·a) with a spatial distribution of high in the west and low in the east. Among them, the high-value areas were clustered and distributed in the key development zones and the agricultural main production zone. Regional agglomeration was enhanced by the net carbon emissions enhancement in the key development and ecological function zone. The reduction zone was distributed mainly in the main production areas of agricultural products. There was an increase in the number of carbon emissions that converted to carbon sinks on the grid scale after the MFZ implementation. 4) The reduced net carbon emissions were attributed to the conversion of agricultural production space into forest ecological space. There was a decrease in the carbon emissions in other main functional zones, due mainly to the conversion of agricultural living space to agricultural production space. Furthermore, the conversion of agricultural to urban space was attributed to the increase in carbon emissions in each subjective functional area. A diversified type of territorial space was attributed to the variations in the carbon emissions after the implementation of the MFZ planning. As such, the MFZ system should be further improved to reduce carbon but increase sinks in the territorial space. Territorial spatial planning should be compiled with the local conditions in low-carbon-oriented activities. Therefore, green and low carbon utilization can be realized with the goal of reducing carbon and increasing sinks in the territorial space. [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 Journal of Computer Engineering & Applications is the property of Beijing Journal of Computer Engineering & Applications Journal Co Ltd. 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 Computer Engineering & Applications is the property of Beijing Journal of Computer Engineering & Applications Journal Co Ltd. 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 Lubrication Engineering (0254-0150) is the property of Editorial Office of LUBRICATION 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 Research of Environmental Sciences is the property of Research of Environmental Sciences Editorial Board 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.)

With the rapid development of industrialization and urbanization as well as enhancement of geographic differentiation and diversity of man-earth areal system, functions and regional development orientations in metropolitan suburbs have shown an increasingly strong trend towards diversification. It is one of the keys to draw up the Rural Revitalization policy objectively to evaluate the multi-functional system and then sum up pattern of metropolitan suburbs. The multi-functional evaluation method of metropolitan suburbs was constructed. The multi-source spatial data, statistical data and survey data were used to evaluate the multi-functional values of the 89 towns in Shanghai. The results showed that: (1) There were significant differences in the development of multifunction among 89 towns in Shanghai. The order of mean values is listed as ecological environment function (0.7674) > economic development function (0.6054) > agricultural production function (0.5882) > life guarantee function (0.5238) > leisure culture function (0.2525). (2) The high value areas of the ecological environment were mainly distributed in Chongming Island, Western Qingpu and Southern Fengxian. The high value areas of agricultural production were mainly located in Southern Pudong, Fengxian, Jinshan, Southern Chongming and Qingpu. The high value areas of economic development was mainly located in the vicinity of central city. The low value areas of life security were mainly located in the towns close to the central city and the most remote towns. The high value area of leisure culture was mainly located in Songjiang, Qingpu and Jinshan, which are the most remote from the central city. (3) A total of 89 towns could be divided into 4 types: balanced, mixed, compound and dominant. Among the 8 subdivision patterns, only 10 towns like Pujiang town were multi-functional and presented a highly balanced development pattern, accounting for 11.24%. Thus, the final but main part of this paper envisions the innovative policies and practices in metropolitan suburbs including the diversified rural renewal, homestead regulation, and low efficiency industrial land reduction. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Chinese Mass Spectrometry Society is the property of Journal of Chinese Mass Spectrometry Society 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 Transactions of Beijing Institute of Technology is the property of Beijing 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 Research of Environmental Sciences is the property of Research of Environmental Sciences Editorial Board 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 Automatica Sinica is the property of Chinese Academy of Sciences, Institute of Automation 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.)

The peridynamic theory was first introduced, then 2 examples of high-speed crack propagating and branching phenomena were given and investigated. The effects of peridynamic parameters including the neighbourhood radius and the grid spacing, and such external parameters as the material elastic modulus, the material density and the temperature difference, on the crack propagating velocity and the crack branching angle were analyzed. It is found from the numerical results that the crack propagating velocity decreases and the crack branching angle increases with the neighbourhood radius; both the crack propagating velocity and the crack branching angle decrease with the grid spacing; the crack branching length in the material of a smaller elastic modulus and a larger density is longer; the crack propagating velocity increases with the elastic modulus difference; the crack propagating velocity increases as the materials'density difference decreases, and decreases with the temperature difference. Moreover, the crack propagating and branching process can be simulated with the peridynamic method spontaneously, without any outer criterion and preset crack propagating paths. Therefore, peridynam-ics has natural advantages in the simulation of high-speed crack propagating and branching phenomena. [ABSTRACT FROM AUTHOR]

FME-SPH coupling method was applied to simulate the mechanism of rock fragmentation by TBM cutters. The 3D coupling models of rock fragmentation by single TBM cutter and two TBM cutters were established. The mechanism of rock fragmentation by TBM cutters was analyzed. The conclusions are summarized as follows: for the rock fragmentation by single TBM cutter，in the stage of the formation of the crused zone，beneath the thrust of a single cutter，microcracks extend downward to form a fan-shaped failure zone；beneath the tangential force of a single cutter，microcracks propagate forward to form the other fan-shaped failure zone. The two fan-shaped failure zones consist of a conical failure zone in rock. In the stage of the formation of microcracks，the growth rate of radial crack is faster than that of median crack. In the stage of the propagation of microcracks，the growth rate of median crack is faster than that of radial crack. When the cutter scrolls to the edge of rock，the fan-shaped failure occurs on the edge of rock. for the rock fragmentation by two TBM cutters，in the initial stage，each cutter independently acts on the rock. A conical failure zone is first formed beneath each cutter. In the stage of the formation of microcracks，the propagation direction of the Hertzian cracks between two cutters are changed because of the interaction of two cutters. In the stage of the propagation of microcracks，Hertzian cracks between the two cutters coalesce，then the rock chipping is formed. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Modern Medicine & Health is the property of Journal of Modern Medicine & Health 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.)