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旨在构建健康、低脂、高稳定性的新型蛋黄酱产品，以甘油和月桂酸为原料经过Novozyme 435脂肪酶催化，制备月桂酸型甘油二酯（DAG）粗产物，采用分子蒸馏和硅胶柱层析技术对粗产物进行纯化得到高纯度月桂酸型DAG（纯度>92%），以此为原料制备油泡沫，探究了搅打时间对油泡沫起泡能力、气泡粒径分布、微观结构及稳定性的影响，并将油泡沫50%部分替代或完全替代大豆油用于蛋黄酱制备，研究油泡沫对蛋黄酱流变学特性、色泽、稳定性的影响。结果表明：随着搅打时间的延长，气泡表面吸附的晶体数量明显增多，气泡粒径增大，起泡率先增大后基本保持不变，搅打时间为15 min时油泡沫起泡率最高，且此时的油泡沫储存2个月体积无明显变化；采用油泡沫部分替代及完全替代大豆油后可降低蛋黄酱的黏度，增加蛋黄酱在应力及频率扫描下的弹性模量，蛋黄酱表现出良好的塑性和稳定性，且蛋黄酱的色泽L*值增加,a*值和b*值降低。采用月桂酸型DAG搅打获得的油泡沫可有效降低蛋黄酱的油脂含量和热量，可作为油脂替代物用于新型蛋黄酱产品的开发。Aming to prepare healthy, low-fat mayonnaise with good stability, diglycerol laurate (DAG) with high purity (>92%) was synthesized via esterification of lauric acid with glycerol by using Novozyme 435 and followed by purification steps involving molecular distillation and silica gel column chromatography, and used as raw material for the preparation of oil foam, and the effects of whipping time on the foaming ability, bubble particle size distribution, microstructure and stability of the oil foam were investigated. Soybean oil was 50% partially replaced or completely replaced by oil foam for the preparation of mayonnaise, and the effects of oil foam on the rheological properties, color and stability of mayonnaise were investigated. The results showed that the number of crystals adsorbed on the surface of the bubbles increased significantly with the prolonging of the whipping time, the particle size of the bubbles increased, and the foaming rate first increased and then remained basically unchanged.The foaming rate was the highest when the whipping time was 15 min, and the oil foam volume did not change significantly after 2 months of storage. After using oil foam to partially replace and completely replace soybean oil, the viscosity of mayonnaise decreased, the modulus of elasticity of mayonnaise under stress and frequency scanning increased, mayonnaise showed good plasticity and stability, and the color L* value of mayonnaise increased, a* value and b* value decreased.The oil foam obtained by whipping with DAG can effectively reduce the oil content and calorie of mayonnaise, and can be used as a oil substitute for the development of new mayonnaise products.

利用南方适宜地区的丘陵山地资源发展油茶产业是未来解决我国油脂行业自给率不足的一个重要途径。河源市是广东省特色油茶产业发展重点区域，有多年种植油茶的传统。在国家政策的激励下，河源市特色油茶产业虽得到一定发展，但也面临机遇和挑战。通过文献调研和实地考察综述了河源市油茶产业的发展历程和发展现状，并针对当地油茶产业存在的良种资源缺乏、缺乏对油茶品种的科学性认识、配套资金补贴不充足、品牌知名度低、产业化程度不高等问题，结合当地实际情况，提出了推进油茶良种繁育基地建设、增加油茶产业资金扶持力度、加强科技创新推广成果转化、加强推广宣传并打造全国知名品牌、有效整合资源优化加工生产布局等相应对策，促进油茶产业高质量发展。It is an important way to solve the shortage of self-sufficiency rate of oil industry by using the hilly resources to develop the Camellia oleifera industry in suitable areas in southern China.Heyuan City is a key area for the development of special Camellia oleifera industry in Guangdong province, which has a tradition of growing Camellia oleifera for many years. Encouraged by national policies, the Camellia oleifera industry in Heyuan has developed vigorously but it still faces with opportunities and challenges. Through literature research and field investigation, the development history and development status of Heyuan Camellia oleifera industry were investigated, where some problems were emerged, including lack of improved variety resources, lack of scientific understanding of Camellia oleifera variety, insufficient capital investment, low brand recognition, and low level of industrialization to Camellia oleifera, etc. In view of the aforementioned existing problems based on the local situation, the corresponding strategies for high-quality industrial development were proposed, such as promoting the construction of improved variety breeding base, increasing capital investment,strengthening the transformation of scientific and technological innovation, enhancing the publicity for making renowned national brand, effectively integrating resource and optimizing production layout.

为研究亚麻籽炒籽过程中形成的美拉德产物（MRPs）以及提高低温压榨亚麻籽油的氧化稳定性，将3种还原糖（葡萄糖、果糖和木糖）与磷脂酰乙醇胺（PE）进行模拟反应，探究反应温度、反应时间和底物物质的量比对MRPs抗氧化活性的影响，利用质谱分析MRPs的主要成分，并考察MRPs对低温压榨亚麻籽油氧化稳定性和醛类化合物形成的影响。结果表明：PE-木糖体系的MRPs具有最高的体外抗氧化能力，其最适反应条件为PE与木糖物质的量比1∶ 1、反应温度160 ℃、反应时间60 min，在该条件下MRPs （2 mg/mL）DPPH自由基清除率达79.57%，铁离子还原抗氧化能力（FRAP）为43.65 μmol/g，铁离子螯合能力为13.34%；通过质谱分析发现由一分子木糖和一分子PE反应形成的PE-吡咯-2-甲醛为MRPs中的主要成分；在190 ℃加速氧化实验中，PE-木糖体系的MRPs对低温压榨亚麻籽油过氧化值和p-茴香胺值的增长表现出与TBHQ相似的抑制作用，同时核磁共振氢谱分析结果表明MRPs可以减缓单烯醛和二烯醛的生成。综上，MRPs可以有效提高油脂的氧化稳定性。In order to study the formation of Maillard reaction products（MRPs） during flaxseed frying and improve the oxidative stability of cold-pressed flaxseed oil, three reducing sugars (glucose, fructose and xylose) were simulated to react with phosphatidylethanolamine (PE), and the effects of reaction temperature, reaction time and molar ratio of substrate on the antioxidant activity of MRPs were investigated. The main components of the MRPs were analyzed by mass spectrometry, and the effects of the MRPs on the oxidative stability and formation of aldehydes of cold-pressed flaxseed oil were investigated.The results showed that the MRPs of PE-xylose system had the highest in vitro antioxidant capacity, and its optimal reaction conditions were molar ratio of xylose to PE 1∶ 1, reaction temperature 160 ℃, and reaction time 60 min. The DPPH radical scavenging rate of the MRPs (2 mg/mL) prepared under the optimal conditions reached 79.57%, the ferric reducing antioxidant capacity (FRAP) was 43.65 μmol/g, and the chelating capacity of iron ions was13.34%; the PE-pyrrole-2-carbaldehyde formed by the reaction of one molecule of xylose and one molecule of PE was found to be the main component in the MRPs by mass spectrometry analysis. In the accelerated oxidation experiment at 190 ℃, the MRPs of PE-xylose system showed similar inhibitory effects to TBHQ on the increase of peroxide value and p-anisidine value of cold-pressed flaxseed oil, while the 1H nuclear magnetic resonance results showed that the MRPs could slow down the generation of monoolefin and dienal. In conclusion, MRPs can effectively improve the oxidative stability of oil.

油脂是人体主要的三大营养素之一，合理膳食油脂对人体供能、提升免疫功能、维持神经和生理活性提供了保障。甘油三酯（TAG）作为食用油脂主要成分，在消化代谢后容易转化为储能脂肪，使机体负担较大。甘油二酯（DAG）是一种天然TAG替代脂，被证明具有多种营养功能。旨在为DAG作为新型健康油脂的应用提供理论基础，综述了DAG的代谢机制以及DAG主要的营养功能。DAG具有和TAG相似的理化性质，由于代谢途径与TAG的差异以及可以调控与脂肪氧化相关基因的表达，使DAG具有促进脂肪氧化、抑制体质量增加、降低内脏脂肪含量、改善血清胆固醇、调节血糖、降低血脂等多种功能。DAG的摄入可有效降低代谢综合征和心血管疾病发生的风险。Oils and fats are one of the three main nutrients in the human body. A balanced diet of oils and fats provide energy to the body, enhance immune function, and maintain neurological and physiological activities. Triacylglycerol (TAG), the main component of edible oils and fats, is easily converted into stored fat after digestion and metabolism, which can burden the body. Diacylglycerol (DAG) is a natural substitute for TAG in edible oil and has been proven to have various nutritional functions. To provide a theoretical basis for the application of DAG as a new type of healthy fat, the metabolic mechanism and main nutritional functions of DAG were reviewed. DAG has similar physicochemical properties to TAG, but due to differences in metabolic pathways and the ability to regulate the expression of genes related to oil oxidation, DAG has multiple functions such as promoting fat oxidation, inhibiting body weight gain, reducing visceral fat content, improving serum cholesterol, regulating blood sugar, and lowering blood lipids. The intake of DAG can effectively reduce the risk of metabolic syndrome and cardiovascular disease.

为研究亚麻籽热榨过程中美拉德反应形成的物质类型及其抗氧化效果，以亚麻籽为原料，在120~200 ℃下炒籽10~30 min并提取亚麻籽油，考察不同炒籽条件下亚麻籽油的氧化稳定性，分析炒籽前后亚麻籽脱脂粉中还原糖和游离氨基酸含量变化，确定美拉德模拟体系的反应底物。以抗氧化活性为指标，对美拉德模拟反应条件进行优化，并考察美拉德反应产物（MRPs）对冷榨亚麻籽油氧化稳定性的影响。结果表明：在180 ℃条件下炒籽20 min制备的亚麻籽油氧化稳定性最好；美拉德模拟反应的最优条件为葡萄糖与赖氨酸物质的量比3∶ 1、反应温度180 ℃、反应时间105 min和葡萄糖与精氨酸物质的量比1∶ 1、反应温度180 ℃、反应时间105 min；两种MRPs对冷榨亚麻籽油过氧化值增长没有明显的抑制效果，而对p-茴香胺值的增长有一定的抑制作用。赖氨酸、精氨酸和葡萄糖的美拉德反应对提高热榨亚麻籽油的氧化稳定性起关键作用，其MRPs对冷榨亚麻籽油具有一定的抗氧化作用。 In order to study the types of substances formed by Maillard reaction during flaxseed hot pressing and their antioxidant effects, flaxseed was roasted at 120-200 ℃ for 10-30 min, and flaxseed oil was extracted. The oxidation stability of flaxseed oil under different roasting conditions was investigated. The changes of reducing sugar and free amino acid content in flaxseed before and after roasting were analyzed, and the reaction substrates of Maillard model system were confirmed. Taking antioxidant activity as an index, Maillard reaction conditions were optimized, and the effects of Maillard reaction products (MRPs) on the oxidative stability of cold pressed flaxseed oil were investigated. The results showed that the flaxseed oil prepared by roasting seeds at 180 ℃ for 20 min had the best oxidation stability. The optimal conditions for Maillard model reaction were obtained as follows：molar ratio of glucose to lysine 3∶ 1, reaction temperature 180 ℃, reaction time 105 min, and molar ratio of glucose to arginine 1∶ 1, reaction temperature 180 ℃, reaction time 105 min. The two MRPs had no significant inhibitory effect on the peroxide value of cold pressed flaxseed oil, while they had some inhibitory effect on the growth of p-anisidine value. The reaction of lysine, arginine and glucose mainly plays an antioxidant role in roasting flaxseed, and its MRPs has a certain antioxidant effect on cold pressed flaxseed oil.

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Exploring the temporal and spatial differentiation of landscape ecological risks in watershed regions and future multi-scenario simulations provides a useful reference for the diagnosis of regional land development problems and the sustainable development of regional ecological environment. It took the Fenhe River Basin as the research object, based on the three phases of land use data in 2000, 2010, and 2020, using GIS grid method, landscape pattern index, spatial statistical analysis and other methods to explore the temporal and spatial differentiation characteristics of the landscape ecological risk in the Fenhe River Basin And its laws, combined with multivariate data. It used the PLUS model to simulate the evolution trend and differences of the ecological risks of the Fenhe River Basin under multiple scenarios in the future. The results showed that: (1) From 2000 to 2020, the average value of the Fenhe River Basin landscape ecological risk index showed an overall downward trend, mainly due to the continuous increase in the area of low-risk areas. (2) Its spatial agglomeration effect increased year by year, and the basin areas with relatively flat terrain were mainly low-risk and low-risk level, and the larger the scope over time, the stronger the agglomeration. (3) In 2035, the landscape ecological risk in the two scenarios will be further reduced, and the average value of the landscape ecological risk in the Fenhe River Basin under the sustainable ecological protection scenario will decrease and the increase in low-risk area is closely related to the increase and connectivity of woodland, grassland, and water areas, while changes in natural development scenarios are closely related to the integration of construction land and cultivated land. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Computer-Aided Design & Computer Graphics / Jisuanji Fuzhu Sheji Yu Tuxingxue Xuebao is the property of Gai Kan Bian Wei Hui 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 response to the problem that seismic wave signals are usually non-stationary, traditional Fourier transform cannot analyze non-stationary signals and cannot reflect the local time-frequency distribution relationship. The advantages and disadvantages of short-term Fourier transform, continuous wavelet transform, and Chirplet transform in analyzing non-stationary signals at single component, second single component, and multi-component instantaneous frequencies were introduced in sequence. The modified kernel function was used to improve the Chirplet transform, effectively improving the time-frequency resolution of the signal to be analyzed. With the increasing difficulty of oil exploration and development, the prediction of thin interbedded reservoirs has gradually become a research focus. Cyclic thin interbedded reservoirs are one of the typical models and also a sedimentary combination of sequence stratigraphy. Compared with the original Chirplet transform and traditional wavelet transform, the improved Chirplet transform can more clearly depict the trend of stratigraphic cycle changes in practical applications, and has important research significance for solving the prediction problem of general thin interbedded sedimentary cycles in the future. [ABSTRACT FROM AUTHOR]

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组织承诺和组织有效性是组织行为学中重要的研究概念和研究对象，但应用于古村落旅游研究的还比较少.对不同经营模式下（外来资本主导型和社区主导型）古村落旅游经营户的组织承诺及旅游组织有效性进行了研究，发现古村落旅游经营户的组织承诺由情感承诺、继续承诺和规范承诺3个维度构成，组织有效性则由旅游发展有效性和社区公共服务有效性构成；组织承诺中的“情感承诺”在不同经营模式下存在较大差异；组织有效性中的“旅游发展有效性”维度在不同经营模式下也显著不同.此外还在因子层面研究了组织承诺对组织有效性的影响.

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In the environment of the increasing difficulty of seismic exploration, the conventional uniform layered medium can no longer meet the development requirements of high precision and high fidelity seismic exploration, and the study of random medium theory has been put on the agenda. At present, the same layer seismic properties are considered to be consistent in the process of 2D or 3D seismic exploration and modeling, and they are mostly based on the research of uniform layered media. This idea ignores the random perturbation brought by the small-scale parameter to the results, and such models often cannot accurately describe the actual strata. So the hybrid 2D and 3D random medium model was constructed and a detailed modeling process was given, the hybrid autocorrelation function of the parameters of the model was analyzed. Numerical simulation results showed, comparing the 2D and 3D random medium seismic attribute model, could be very clear and intuitively see the random disturbance in the stratum, effectively simulated the random medium distribution in the actual underground structure details. At the same time, 2D and 3D cone functions were introduced to model the error suppression in the discrete process. Finally, the method of 3D random medium modeling with direction factor was proposed. Compared with the traditional method, it is more conducive to compare the distribution characteristics of cracks in the actual geological structure. The theory also has good results in the actual forward simulation. [ABSTRACT FROM AUTHOR]

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Objective　 To investigate the effect of interfering with the expression of VEGF-C on the radiosensitivity of the nasopharyngeal carcinoma CNE-2 cell transplanted tumor and related signaling pathways. Methods　The mice with transplanted tumors of nasopharyngeal carcinoma CNE-2 were randomly divided into tumor body group，siRNA-NC group， siRNA-VEGF-C group; irradiation group；siRNA-NC+ irradiation group; siRNA-VEGF-C+irradiation group. Tumor growth was observed，and the protein expression of VEGF-C，ATM and P65 were detected by immunohistochemistry. Results　Interference of VEGF-C expression in nasopharyngeal carcinoma CNE-2 cell transplanted tumors showed significantly slower tumor growth after irradiation. Immunohistochemical test results showed that after tumor transplantation of mice interfered with VEGF-C，VEGFC and ATM were significantly decreased （ P < 0.05）， while P65 was increased （ P < 0.05） . After combined irradiation，VEGF-C and ATM were significantly decreased （P < 0.05）. Conclusion　In mouse nasopharyngeal carcinoma CNE-2 cell transplantation tumors，interfering with VEGF-C gene affects downstream ATM by activating NF-kB signaling pathway，thereby increasing the sensitivity of radiotherapy. [ABSTRACT FROM AUTHOR]

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The calcine from the roasting of some gold-bearing pyrite contains 3. 90 g/t gold and 44. 32 g/t silver. The gold in the calcine is mostly naked/semi-naked gold, partly included in iron mineral, making the grinding-leaching process suitable for gold recovery. The new low toxicity type of gold leaching agent KJ-1 is selected for gold extraction. The effects of grinding fineness, hydrogen peroxide dosage, lime dosage and other process parameters on the gold leaching index are investigated. The results show KJ-1 gold leaching effect is equivalent to sodium cyanide, KJ-1 is environment-friendly with less toxicity. Under optimal conditions obtained, the gold and silver leaching rates reach 86. 15 % and 76. 73 % respectively. The gold and silver are effectively recovered from the calcine. The study provides technical support for the effective utilization of this type of resource. [ABSTRACT FROM AUTHOR]

In March 2022, EASL released a new version of the clinical practice guidelines on haemochromatosis. Haemochromatosis is characterized by elevated transferrin saturation（TSAT） and progressive iron overload mainly involving the liver, and early diagnosis and venesection can prevent liver cirrhosis, hepatocellular carcinoma, diabetes, arthritis, and other complications. For patients with p.Cys282 Tyr homozygous mutation of the hemochromatosis gene HFE, haemochromatosis can be diagnosed if serum iron parameters show TSAT >45% and ferritin >200 μg/L in female patients, or TSAT >50% and ferritin >300 μg/L in male patients and postmenopausal female patients. If a patient has elevated TSAT and ferritin and belongs to other HFE genotypes, magnetic resonance or liver biopsy is needed to confirm iron overload in the liver. Liver fibrosis stage and damage to other organs should be carefully assessed at the time of diagnosis, which will help to determine management strategies. Hepatocellular carcinoma should be screened for patients with progressive liver fibrosis. The goal of venesection is to achieve ferritin <50 μg/L during the induction stage and ferritin <100 μg/L during the maintenance stage. [ABSTRACT FROM AUTHOR]

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Copyright of Journal of Agricultural Big Data is the property of Journal of Agricultural Big Data 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.)

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Human activities have dramatically changed the subsurface flow and caused problems such as salinization and desertification that degrade groundwater-dependent the ecosystem. Taking the shallow groundwater layer as the link, a conceptual model of phreatic water evaporation in arid plains is established. The model analyses the groundwater depth conditions of desertification and salinization in arid areas, and calculates threshold water table required for preventing these problems. The Luocheng Irrigation District at the junction of the middle and lower reaches of Heihe River is taken as an example to study the relation between groundwater depths and ecosystems patterns. The contributions of this study include: ① Describing the soil water movement principle caused by desertification outside the salinized oasis in the arid area, based on which, the method for calculating the threshold groundwater depth for preventing salinization is provided. By calculation, the critical groundwater depth leading to soil salinization is 1.3~1.5 m and the calculated critical groundwater level is 8~13 m; ② Discussing the appropriate values of soil equivalent pore diameter and liquid surface tension used for estimating the maximum rising height of capillary water; ③ Proposing a scheme to regulate the groundwater level regulation via controlling irrigation in the area to protect groundwater-dependent ecosystems while satisfying water demand for irrigation and other purposes. [ABSTRACT FROM AUTHOR]

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Copyright of Oil Drilling & Production Technology / Shiyou Zuancai Gongyi is the property of Shiyou Zuancai Gongyi Bianjibu 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.)

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Copyright of Chinese Journal of Contemporary Pediatrics is the property of Xiangya Medical 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.)