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黄曲霉毒素污染是影响花生油食用安全性的重要因素之一，为了优化黄曲霉毒素的吸附工艺，分别从吸附剂添加量、吸附时间、吸附温度及黄曲霉毒素B1（AFB1）污染水平等方面研究4种吸附剂（活性白土、膨润土、改性蒙脱土A、改性蒙脱土B）对花生原油中AFB1的吸附效果以及对花生油综合品质的影响。结果表明：添加量为0.1%～1.0%时，4种吸附剂对AFB1的吸附率随添加量增加而提高，达到一定水平后，吸附率维持动态平衡；吸附时间为20～60 min、吸附温度为45～115 ℃时，4种吸附剂对AFB1的吸附率均随着吸附时间的延长和吸附温度的升高而提高；花生原油中AFB1的污染水平对吸附率的影响不明显；花生原油经4种吸附剂处理后，污染物（总砷和铅）未检出，脂肪酸组成（油酸和亚油含量）无明显变化，酸值、过氧化值、维生素E含量、角鲨烯含量以及甾醇含量均变化不大；4种吸附剂对花生油中的风味物质均有吸附，其中活性白土吸附程度最大，仅保留30.6%的风味物质，而改性蒙脱土B对风味物质吸附最少，能够保留89.5%的风味物质。综上，改性蒙脱土B不仅能够高效吸附AFB1，而且对花生油的综合品质影响很小，安全可靠，适宜在油脂行业推广应用。 Aflatoxin is one of the important factors affecting the safety of peanut oil. In order to optimize process of aflatoxin adsorption, the adsorption effect of four adsorbents(activated clay, bentonite, modified montmorillonite A and modified montmorillonite B) on aflatoxin B1(AFB1) in crude peanut oil and the influence on the comprehensive quality of peanut oil were studied from the aspects of adsorbent addition amount, adsorption time, adsorption temperature and AFB1 pollution level, respectively. The results showed that when the adsorbent addition amount was 0.1%-1.0%, the adsorption rates of the four adsorbents for AFB1 increased with the increase of the addition amount and then the adsorption rates maintained the dynamic balance. When the adsorption time ranged from 20 min to 60 min and the adsorption temperature ranged from 45 ℃ to 115 ℃, the adsorption rate of the four adsorbents promoted with the increasing of adsorption time and adsorption temperature. While the pollution level of AFB1 in crude peanut oil had no obvious effect on the adsorption rate. The pollutants (total arsenic and lead) were not detected, and fatty acid composition(oleic acid and linoleic acid content) had no significant change after the crude peanut oil treated with four adsorbents. Moreover, the acid value, peroxide value, vitamin E content, squalene content and sterol content showed little change. All of the four adsorbents adsorbed the flavor substances in the oil, among which the activated clay adsorbed the most and retained only 30.6% of the flavor substances, while the modified montmorillonite B adsorbed the least and retained 89.5% of the flavor substances. In conclusion, the modified montmorillonite B can not only adsorb AFB1 efficiently, but also has little impact on the comprehensive quality of peanut oil, which is safe and reliable, so it is suitable for popularization and application in oil industry.

为了快速、准确测定成品植物油和花生原油中黄曲霉毒素B1（AFB1）的含量，建立了采用多功能净化柱对油样进行前处理，再结合光化学衍生高效液相色谱法测定植物油中AFB1含量的方法，对前处理提取剂、高效液相色谱法的分析条件（色谱柱、进样量）进行优化，再通过与国标中免疫亲和柱法进行比较，对所建立的方法进行评价。结果表明：优化的条件为以乙腈-水溶液（84+16）为提取剂，采用Zorbax Eclipse XDB-C18色谱柱（4.6 mm×150 mm，5 μm），进样量10 μL；建立的方法加标回收率和精密度良好，定量限为0.2 μg/kg，低于GB 2761—2017规定的最低限量值要求，可满足企业生产的监测需求；将建立的方法用于测定浅色植物油中AFB1时，检测结果与免疫亲和柱法相比相对误差为0~18.0%，符合国标要求，但对于深色植物油测定的相对误差超出国标要求。综上，建立的方法可用于快速、准确检测花生油（成品油和原油）及成品玉米油、亚麻籽油、葵花籽油、浅黄色菜籽油、黄色芝麻油中AFB1的含量。 To determine aflatoxin B1(AFB1) in finished vegetable oil and crude peanut oil quickly and accurately,a method was developed for the determination of AFB1 content in vegetable oil using a multifunctional clean-up column for the pretreatment of oil samples combined with photochemical derivatization and high performance liquid chromatography(HPLC). The pretreatment extractant and the HPLC analysis conditions (chromatographic column and injection volume) were optimized,and the method was evaluated by comparing with the national standard of immune- affinity column. The results showed that the optimal conditions were with acetonitrile-water solution (84+16) as the extractant, Zorbax Eclipse XDB-C18 (4.6 mm×150 mm， 5 μm) chromatographic column and injection volume 10 μL. The established method had good spiked recovery and precision,and the quantitation limit was 0.2 μg/kg, lower than the minimum limit specified in GB 2761-2017, which could meet the requirements of actual production. When the established method was used for the determination of AFB1 in light-colored vegetable oils, the relative error of the detection results compared with the immune-affinity column method was 0-18.0%, which was in accordance with the national standard, but the relative error for the determination of dark-colored vegetable oils exceeded the national standard. In summary, the method can detect AFB1 content in light vegetable oil such as peanut oil (finished oil and crude oil) and finished corn oil, flaxseed oil, sunflower seed oil, light yellow rapeseed oil and yellow sesame oil quickly and accurately.

Copyright of Chinese Journal of Preventive Veterinary Medicine / Zhongguo Yufang Shouyi Xuebao is the property of Chinese Journal of Preventive Veterinary Medicine 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 Tianjin Medical Journal is the property of Tianjin Medical 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 Beijing University of Traditional Chinese Medicine is the property of Journal of Beijing University of Traditional Chinese Medicine 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 effects of brucea javanica emulsion injection on quality of life, tumor markers and recurrence and metastasis indexes in patients with colorectal cancer after radical resection. Methods: 78 cases colorectal cancer after radical resection admitted to our hospital from October 2018 to March 2020, then divided into control group and observation group according to the principle of voluntary treatment and tolerance of patients, with 39 patients in each group. Patients in the control group were treated with conventional chemotherapy, while patients in the observation group were treated with brucea javanica injection on the basis of conventional chemotherapy, with a course of 14 days as a continuous treatment for 12 courses. The clinical effects of the two groups of patients after treatment were observed, and the changes of Karnofsky scores, tumor markers (serum CEA, saccharide antigen 199 (CA-199),neuron-specific enolase (NSE) and recurrence and metastasis indicators (transforming growth factor-1 (TGF-β1), Smad4, and vascular endothelial growth factor (VEGF)) levels before and after treatment were statistically analyzed. Results: Both the observation group and the control group could improve the quality of life of patients. After treatment, the comparative analysis of the two groups showed that the observation group had more significant increase in KPS score (P<0.05). Before treatment, there was no statistically significant difference in tumor markers and recurrence and metastasis indexes between the two groups (P>0.05). After treatment, tumor markers CEA,CA-199 and NSE in the two groups were all reduced, and the reduction degree of patients in the observation group was more statistically significant than that in the control group (P<0.05); The positive rates of TGF-β1 and VEGF in the observation group were reduced, while the positive rates of Smad4 were increased, there were statistically significant differences between the reduction or increase degree of each indicator in the observation group and the control group (P<0.05). Conclusion: Brucea javanica oil emulsion injection is used as adjuvant chemotherapy in colorectal cancer patients. Compared with conventional chemotherapy, the quality of life of patients is improved, the possibility of recurrence and metastasis is reduced. Therefore, it is a clinically worthy adjuvant chemotherapy method. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Food Safety & Quality is the property of Journal of Food Safety & Quality 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 Kunming Medical University / Kunming Yike Daxue Xuebao is the property of Kunming Medical 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.)

For the unbalanced resource utilization of cloud computing cluster, this paper gave a resource scheduling strategy of cloud based on dynamic migration of virtual machine technology. During the migration process, it firstly determined the hotspots based on index smooth forecasting with window thinking, then selected the virtual machine by considering the effect of migration and migration speed. It used the particle swarm optimization annealing thinking and long-term optimization goals in the process of migration to search optimal position. By CloudSim simulation framework, the experiment simulated the appearances of the SLA violation rate, the rate of surplus resources, energy and migration times, and the algorithm is better than the greedy algorithm with migration and the standard particle swarm optimization algorithm and the sequence virtual machines placement with non-migratory. Experimental results also show that the algorithm is superior in all respects than the other algorithms, and this algorithm provides a new method on cloud computing platform for the research about improving the performance of cloud platform. [ABSTRACT FROM AUTHOR]