Search

Copyright of Chinese Journal of Oncology is the property of Chinese Journal of Oncology / Zhonghua Zhongliu Zazhi 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 Continue Education Research is the property of Harbin Normal 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.)

Copyright of China Pulp & Paper is the property of China Pulp & Paper Magazines Publisher 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 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 Practical Pharmacy & Clinical Remedies is the property of Editorial Department of Practical Pharmacy & Clinical Remedies 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 Natural Gas Geoscience is the property of Natural Gas Geoscience 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.)

醛和硝基甲烷在甲醇和NaOH水溶液的混合溶液中在0 ℃反应，随后用稀盐酸处理，生成(E)-α，β-不饱和硝基烯烃单一化合物，反应有高度的区域选择性，收率较高(76%〜95%).合成方法便捷、高效、清洁，属于绿色合成.

以FeCl3为催化剂，L-脯氨酸为配体，以K2CO3为碱，在氮气的保护下在乙二醇二甲醚中回流，有效促进了溴代芳烃和取代硫酚的偶联反应生成相应的硫醚，产物的收率较高.

用冠醚与类双百草枯合成了新型的4价离子型穴醚，并且初步研究了它与3个客体的络合.4价离子型穴醚与百草枯的络合作用明显.4价离子型穴醚对3个客体有选择性识别作用.分子力学模拟结果也支持了以上结论.

设计并合成了一种新颖的冠醚5和3种有着不同夹角（A180、A120和A60）的双百草枯衍生物.双百草枯衍生物中以苯为中心的两个百草枯基团间的夹角的作用表现为：冠醚5对类双百草枯的络合有着显著的影响.量子化学计算也论证了这一结果.冠醚5对上述3种类双百草枯有着选择性识别作用.

Echinoclathrines A是海洋天然产物.首次完成了 Echinoclathrines A的全合成，反应总共4步，总收率为12%.该全合成的关键步骤是钯催化的芳基氯与2-甲基-4-吡啶硼酸的Suzuki偶联反应.

以对甲氧基苯酚、对苄氧基苯酚、对苯二酚和四乙二醇二磺酸酯这些简单化合物为原料,通过磺酸酯与酚的亲核取代反应及苄基保护、钯碳氢化去保护策略制备得到了4种新颖的苯并寡聚乙二氧链螺旋体化合物.

以Sonogashira偶联反应为关键反应来合成化合物4.设计并且用Suzuki偶联反应为关键反应,合成了新型含BPP34C10冠醚的180°双吡啶双齿配体.该双吡啶双齿配体有两个配位点,有望和铂受体用于自组装成新型的超分子建筑.

合成仿生体系的含1, 5-二氧萘基的富电子折叠体2N、3N、4N和含1, 4-二氧苯基的富电子折叠体2B、3B和4B.用紫外光谱研究了富电子折叠体与缺电子四价离子环番(CBPQT)之间的吸收光谱.结果显示折叠体中的1, 5-二氧萘基的个数越多,其吸收越大,供受体之间的作用越强.随着分子中1, 4-二氧苯基个数的增加,供受体之间的作用由微小到弱相互作用.含1, 5-二氧萘基的富电子折叠体和CBPQT之间的相互作用要远远大于含1, 4-二氧苯基的折叠体和CBPQT之间的相互作用.CBPQT对于含萘环电子供体和含苯环的富电子折叠体具有选择性识别作用.

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.)

目的 对进行辅助生殖的遗传咨询者进行外周血细胞遗传学分析,探讨生育异常与染色体核 型异常的关系,为临床诊疗和遗传咨询提供依据。方法 回顾性分析2019-2021年岳阳市某医院1340例遗 传咨询患者的临床表现及外周血染色体核型异常情况。结果 1340例患者中,异常核型检出率为2.54%(34/ 1340),其中性染色体异常21例,占异常核型的61.76%(21/34);常染色体异常11例,占异常核型的32.35% (11/34);同时检出46,XY 性反转1例,标记染色体1例。1340例患者中,共检出染色体多态性变异201例,多 态率为15.0%(201/1340)。染色体多态变异以 Y 染色体长臂异染色质区长短和 D/G 组染色体随体区变异检 出率最高。结论 染色体异常是导致不孕不育等生育问题的重要原因之一,临床上对生殖遗传咨询患者进行 外周血染色体检查,可为临床诊断与辅助生殖技术提供依据. [ABSTRACT FROM AUTHOR]

Copyright of Journal on Communication / Tongxin Xuebao is the property of Journal on Communications 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.)

目的：探讨右心房⁃升主动脉插管体外膜肺氧合 (中心ECMO) 在双肺移植术中的应用。方法：搜集2020 年 3月— 2021年9月在双肺移植手术中使用中心ECMO 的 8 例患者，其中肺间质纤维化6例，慢性闭塞性细支气管炎1例，肺泡微石 症1例，所有肺移植患者都合并不同程度肺动脉高压，采用 Clamshell 切口行双肺移植。结果：所有患者顺利完成手术，术中置 入 ECMO 后肺动脉压显著降低［ECMO置入前 (82.75 ± 29.87) mmHg vs. ECMO置入后 (28.37 ± 8.21) mmHg], 其中7例术毕即撤 除ECMO，1例因低氧血症转为股静脉颈内静脉插管即VV⁃ECMO。随访至今存活6例，2例因术后肺部感染死亡。结论：右心 房升主动脉插管体外膜肺氧合可以有效应用于肺动脉高压患者中，提高肺移植手术安全性。 [ABSTRACT FROM AUTHOR]

Copyright of Journal of Harbin Institute of Technology. Social Sciences Edition / Haerbin Gongye Daxue Xuebao. Shehui Kexue Ban is the property of Harbin Institute 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 Journal of Harbin Institute of Technology. Social Sciences Edition / Haerbin Gongye Daxue Xuebao. Shehui Kexue Ban is the property of Harbin Institute 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 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 Electric Machines & Control / Dianji Yu Kongzhi Xuebao is the property of Electric Machines & Control 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 explore the relationship between serum ferritin and femoral neck strength index in postmenopausal women. Methods We selected 116 perimenopausal women who were present in our hospital from July 2014 to December 2017 to participate in this study. Geometric bone structure properties, including hip axis length ( HAL) and femur neck width (FNW) , were measured using dual-energy X-ray absorptiometry scans and were combined with bone mineral density (BMD) , body weight, and height to create composite indices of femur neck strength relative to load in three different failure models, compression ( CSI) , bending (BSI) , and impact strength indices (ISI). Results After adjustment for age, body mass index (BMI) , lifestyle factors, serum 25-hydroxyvitamin D, calcium and phosphorus intake, diabetes, and menopause status, multiple regression analyses revealed that serum ferritin was inversely associated with BMD values at the lumbar spine and femur neck and the cortical thickness of the femur neck. Importantly, in all adjustment models, higher serum ferritin was consistently associated with the lower values for all three femur neck composite indices, such as CSI, BSI, and ISI (P<0.05). Conclusion The result of the study suggest that the increase in systemic iron stores reflected by high serum ferritin may be related to a decrease in bone strength relative to the load. [ABSTRACT FROM AUTHOR]

Copyright of Progress in Modern Biomedicine is the property of Publishing House of Progress in Modern Biomedicine 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.)

Physiological and biochemical indices play a significant role in the evaluation of wheat storage quality. The changes in the storage environment and time will not only cause the deterioration of wheat quality but also cause significant changes of wheat physiological and biochemical indices. However, the information expressed is quite different, which brings great inconvenience to the analysis of wheat storage quality. To solve this problem, a multi-index analysis model of wheat storage quality was proposed in this paper. The falling number, germination rate, peroxidase, fatty acid, conductivity, reducing sugar were selected. Seven physiological and biochemical indices of malondialdehyde were selected as the key factors in this paper. First, the KMO (kaiser-meyer-olkin) and Bartlett's sphericity method were used to test the wheat index, and it was found that the KMO measure value was 0.807 > 0.7, SIG value was less than 0.001, which indicated that the selected index and the measured data were suitable for factor analysis. Then the correlation of wheat index was calculated by the European similarity coefficient and PCA(principal components analysis). The results showed that the distance between the falling number and fatty acid, reducing sugar value, malondialdehyde and conductivity was small, which indicated that the effect of these five indices on the quality of wheat was the same. Meanwhile, these five indices are very far away from germination rate and peroxidase, indicating that they are different in expressing the quality of wheat. In addition, the distance between the germination rate and peroxidase is very close. It shows that the two indices reflect the same quality in some degree. The sensitivity of fatty acid is the highest (0.186), which indicates that it has the greatest influence on the evaluation result, so this index can be used as the key index to evaluate wheat quality, and the sensitivity of peroxidase (0.160) is the least, and it has the least influence on the evaluation result. After a comprehensive analysis, the peroxidase was eliminated and the other six indices were retained for further calculation. Then, a systematic classification method based on nearest element and square Euclidean distance is used to cluster the wheat data. The classification results show that the wheat sample is composed of three kinds of data with obvious classification characteristics. The primary classification of wheat was obtained by analyzing the distribution of fatty acid data, and the discriminant function was obtained by using the Fisher discriminant method to train wheat data. According to the discriminant function, the center value of excellent wheat was –5.699 9. The center value of medium wheat was 1.316 and the center value of poor wheat was 3.945. By comparing the distance between the value of unknown wheat under this function and the center value of these three kinds of wheat, the unknown wheat classification can be identified. If a batch of wheat has the smallest distance to one center value of these three kinds of wheat, then it would be identified as this classification. The final test analysis shows: The result of the classification of wheat storage quality by the discriminant model in this paper is up to 88.9% in accordance with the classification of an actual reference standard. The analysis model in this paper is basically correct, which can not only provide technical support for the construction of quality evaluation system of stored wheat, but also guide the analysis and discrimination of other grain crops to a certain extent. [ABSTRACT FROM AUTHOR]

Copyright of Food Research & Development is the property of Food Research & Development 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.)

Objective To investigate the effect of Resveratrol on protein biomarkers of postmenopausal women with osteoporosis. Methods Eighty-four postmenopausal osteoporosis patients treated in our hospital from November 2015 to November 2017 were selected as the study subjects; all patients were randomly divided into two groups: the resveratrol treatment group and the control group. The treatment group participants took resveratrol daily for 3 month and the control group participants took placebo tablets in the same way. After 3 months, serum bone metabolism markers type I procollagen amino terminal propeptide(PINP), osteocalcin(BGP), bone alkaline phosphatase(BALP), type I collagen C-terminal peptide specific sequence(β-CTX), plasma protein carbonyl(PCO), advanced oxidation protein product(AOPP), total antioxidant capacity(TAC), and Akatsu(MDA) levels were measured. Results After treatment with resveratrol, serum PINP, BGP, BALP,β-CTX, PCO, AOPP and MDA levels of this group were significantly lower than before treatment(P<0.05), and there was also a statistically significant difference between the two groups after treatment(P<0.05); resveratrol group Serum TAC levels were significantly higher than before treatment(P<0.05); in addition, there was a significant statistical difference between the two groups after treatment(P<0.05); however, No difference of the above indicators PINP, BGP, BALP,β-CTX PCO, TAC, AOPP and MDA were observed before and after treatment in the control group(P>0.05). Conclusion Resveratrol can reduce oxidative stress and high bone turnover rate in postmenopausal women with osteoporosis. [ABSTRACT FROM AUTHOR]

Copyright of Forensic Science & Technology is the property of Institute of Forensic Science, Ministry of Public Security 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 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.)

The microstructural evolution, the fracture morphology, and fracture mechanism of the weakly cemented sandstone in the Hongqing River ore area of the Ordos, western China, are studied through water saturation experiment, SEM scanning electron microscopy, QEMSCAN scanning electron microscopy, and mechanical experiments etc. The results show that the diagenetic characteristics of weakly cemented sandstone determine the close correlation between their features ( specifically , softening with water and disintegration ) and their mineral composition and structural characteristics. The study confirms that the destruction of meso-structure during the softening process is due to the destruction of cementation matters, and that the fracture is located the interface between the particles, or between the particles and the cementation matters. The macroscopic mechanical behavior of the weakly cemented sandstone is mainly determined by the contact between the particles. When the boundary load changes,the final fracture of the sandstone occurs in the clay cementation matters, or in the interface between them and the mineral grains, with only a little of fracture occurring in the mineral grains. The changes in the internal structure of the granule system can be divided into four types, namely, particle breakage, particles or particle groups breaking away from the matrix structure, the spreading along the grain fracture and the dispersed distribution of microfracture, and the damage of cementation matters. The mechanical properties of cementation matters constitute a key factor in the forms through which damage occurs, which lays a foundation to further study the deformation and damage mechanism of weakly cemented sandstone. [ABSTRACT FROM AUTHOR]

According to the security of service chain for virtualized network function,this paper proposed a security service chain architecture based on trusted computing.Firstly,it set up a trusted management center module for the network function virtualized architecture based on trusted computing,which provided credible authentication for the generation of the virtual network function instance and the generation and adjustment of the service chain.Then,it designed the security protocols for the process of generation and adjustment of service chain.Finally,it introduced the HOTP protocol into the model to realize the secure authentication and secure transmission between the instances of the service chain,and supported the dynamic expansion and adjustment of the service chain nodes.The architecture simulation and analysis results show that the security architecture improves the security while guaranteeing the dynamic of the service chain. [ABSTRACT FROM AUTHOR]

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.)

Copyright of Journal of Vibration Engineering is the property of Nanjing University of Aeronautics & Astronautics 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.)

According to the characteristics of service chaining, such as the one is independent of dedicated hardware and the net-worl topology of service chaining is variable, this paper proposed an authenticated group key management scheme for service chain. The scheme used a bilinear mapping based on the (t,n) threshold. It adopted the metliod of identity authentication and improved the efficiency and security of tlie protocol. The scheme completed the key update，at the same time it completed the identity authentication between adjacent virtual network functions. This paper discussed the security and correctness of the scheme. The analysis results showthat the scheme can ensure the security of each instance in the service chain. It has the advantages of less number of wheels，less communication and computation overhead. It is suitable for dynamic key management of service chain. [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.)

Copyright of Progress in Modern Biomedicine is the property of Publishing House of Progress in Modern Biomedicine 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.)