检索结果-南通市图书馆

仿生态条件下星洲红鱼(Singapore red tilapia)和奥尼罗非鱼(Oreochromis niloticus)生长和肌肉营养特性的比较研究

在线全文

学校读者我要写书评

暂无评论

海洋与湖沼 2022年第1期53卷 141-149页

作者：林祥日厦门海洋职业技术学院海洋生物学院福建厦门361100

为比较星洲红鱼(Singapore red tilapia)和奥尼罗非鱼(Oreochromis niloticus)的生长和肌肉营养特性,实验利用两种鱼的不同体色将其混养在同一池塘中,在相同的环境条件和养殖管理下研究其生长特性,并分析肌肉营养成分。结果表明:两种罗... 详细信息

为比较星洲红鱼(Singapore red tilapia)和奥尼罗非鱼(Oreochromis niloticus)的生长和肌肉营养特性,实验利用两种鱼的不同体色将其混养在同一池塘中,在相同的环境条件和养殖管理下研究其生长特性,并分析肌肉营养成分。结果表明:两种罗非鱼生长在前60 d无差异,60 d后星洲红鱼的体长、体质量日增长和特定生长率均大于奥尼罗非鱼,且差异显著(PnEAA、DAA/TAA和EAAI分别为41.04%和40.95%,70.00%和69.34%,40.71%和39.08%,67.46%和67.08%,差异不显著。星洲红鱼、奥尼罗非鱼肌肉∑SFA和∑UFA分别为28.03%和28.60%,63.87%和61.38%,各脂肪酸含量除C14:0和C18:2外,其他含量差异不显著。研究表明,星洲红鱼和奥尼罗非鱼生长快、营养丰富、食用价值高,是优质淡水鱼类养殖品种,其中星洲红鱼含肉率高,生长快,养殖效益明显。

关键词：星洲红鱼(Singapore red tilapia) 奥尼罗非鱼(Oreochromis niloticus) 生长肌肉营养评价

Planarized Polymer Acceptor Featuring High Electron Mobility for Efficient All-Polymer Solar Cells

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2022年第8期40卷 968-978,I0011页

作者： Feng Liu ri Sun Cheng-yu Wang Liang Zhou Wen-Li Su Qi-Hui yue Shuai Sun Wu-yue Liu Hai-Jun Fan Wen-Kai Zhang yun-Long Guo Li-Heng Feng Xiao-Zhang Zhu School of Chemistry and Chemical Engineering Shanxi UniversityTaiyuan030006China Beijing national Laboratory for Molecular Sciences CAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing100190China Department of Physics and Applied Optics Beijing Area Major Laboratory Center for Advanced Quantum StudiesBeijing Normal UniversityBeijing100875China University of Chinese Academy of Sciences Beijing100049China

Significant progress has been achieved for all-polymer solar cells(APSCs)in the last few years by the use of polymerized small molecular acceptors(PSMAs).Developing high electron mobility polymer acceptors has been considered a feasible solution to further improve the photovoltaic performance of APSCs and fabricate thick film devices,which contributed to roll-to-roll printing *** this work,we designed and synthesized PSV,an A-DA’D-A small molecule acceptor-based PSMA with the vinyl group as a bridged linkage to reduce the steric hindrance between the 1,1-dicyanomethylene-3-indanone(IC)terminal *** comparison with the C-C bond linked polymer acceptor PS,PSV exhibits an almost planar conjugated framework and well-ordered molecular stacking in the thin ***,PSV exhibits superior n-type semiconducting properties with high electron mobility of up to 0.54 cm^(2)·V^(−1)·s^(−1),which is the highest value among reported *** utilizing PM6 as a polymer donor,PSV-based blend forms a favorable nanomorphology and exhibits high and well-balanced hole/electron mobilities,which is beneficial for exciton separation and charge ***,APSCs based on PM6:PSV achieved high power conversion efficiencies of up to 15.73%,with a simultaneously realized high Voc of 0.923 V,Jsc of 23.2 mA·cm^(-2),and FF of *** superior features enable PSV with excellent thickness-insensitive properties and over 13%PCE was obtained at 300 *** the best of our knowledge,the high PCE of 15.73%with excellent electron mobility of 0.54 cm^(2)·V^(−1)·s^(−1)is the highest values reported for *** results point to the great significance of developing polymer acceptors with a high electron mobility for boosting the performance of APSCs.

关键词： All-polymer solar cells Polymerized small molecular acceptors Planarization Electron mobility Thick film organic solar cells

弯角与单侧PVP治疗骨质疏松性椎体压缩骨折疗效比较的回顾性研究

在线全文

学校读者我要写书评

暂无评论

现代生物医学进展 2024年第7期24卷 1281-1285页

作者：高云龙王和洪孙燚炎赵日光赵雪岩朱雪坤冯晖中国人民解放军陆军第七十一集团军医院骨科江苏徐州221004

目的:回顾性比较弯角与单侧经皮椎体成形术(PVP)治疗骨质疏松性椎体压缩骨折(OVCF)疗效。方法:回顾性分析2020年1月-2023年1月期间中国人民解放军陆军第七十一集团军医院骨科收治的98例OVCF患者的临床资料。根据手术方式的不同将患者分... 详细信息

目的:回顾性比较弯角与单侧经皮椎体成形术(PVP)治疗骨质疏松性椎体压缩骨折(OVCF)疗效。方法:回顾性分析2020年1月-2023年1月期间中国人民解放军陆军第七十一集团军医院骨科收治的98例OVCF患者的临床资料。根据手术方式的不同将患者分为弯角组(n=51)、单侧组(n=47),对比两组围术期指标、骨水泥双侧分布情况、骨水泥渗漏情况、疼痛视觉模拟评分(visual analogue scaleVAS)、Oswestry功能障碍指数(Oswestry disability index,ODI)和并发症发生率。结果:两组术中出血量、总治疗费用、住院时间对比未见差异(P>0.05)。与单侧组相比,弯角组的骨水泥双侧分布情况更优,骨水泥渗漏发生率更低(P0.05)。结论:与单侧PVP相比,弯角PVP治疗OVCF,可获得相当的效果,同时还可降低骨水泥渗漏发生率,减轻术后疼痛,促进术后功能恢复。

关键词：弯角经皮椎体成形术单侧疗效骨质疏松性椎体压缩骨折

Self-reduction Mechanism of Coal Composite Stainless Steel Dust Hot Briquette

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research(International) 2016年第4期23卷 314-321页

作者： Sok-chol ri Man-sheng CHU Shuang-yin CHEn Zheng-gen LIU Hun HOnG School of Metallurgy Northeastern University School of Metallurgical Engineering Kim Chaek University of Technology

To efficiently recycle valuable metals such as chromium and nickel in stainless steel dust, self-reduction ex- periments were carried out to study the reduction mechanism of metal oxides in coal composite stainless steel dust hot briquette, which is defined as a CCSB here. Self-reduction of CCSB is proceeded by volatile matter and fixed carbon contained within CCSB. Experiments were performed to study the effects of temperature and carbon to oxygen （C/OCoal） ratio on self reduction of CCSB. At 1400 and 1450℃, volatile matter in coal used for experiment could take the place of about 40℃ of fixed carbon in coal. Under the present experimental conditions, reduction product of chromium appears as FeCr2O2, Cr2O3, Cr7C3 , and [Cr] in turn during reduction. To evaluate the formation of met al nuggets in self reduction process of CCSB, metal nuggets containing chromium and nickel were observed in outside of reduction products under various conditions, and thermodynamic equilibrium calculation was carried out for possi hie products and formation of molten metal by fixed carbon. SEM and EDS analyses were made for metal nugget and slag in reduced product. The results reveal that it is reasonable to achieve the metal nuggets at 1450℃, 0.8 of C/OCoal ratio and 20 min of reduction time. The nugget formation can indicate one innovative process for comprehensive utilization of stainless steel dust.

关键词： stainless steel dust coal composite hot briquette self reduction metal nugget

Revisiting Asymmetry for the Decaying Phases of El ni?o and La ni?a

在线全文

学校读者我要写书评

暂无评论

Atmospheric and Oceanic Science Letters 2014年第4期7卷 275-278页

作者： CHEn Wei LU ri-yu Buwen DOnG State Key Laboratory of numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric Physics Chinese Academy of Sciences national Centre for Atmospheric Science-Climate Department of Meteorology University of Reading

This study investigated the relationship between the asymmetry in the duration of El ni?o and La ni?a and the length of their decaying phases. The results suggested that the duration asymmetry comes from the long decaying EnSO cases rather than the short decaying ones. The evolutions of short decaying El ni?o and La ni?a are approximately a mirror image with a rapid decline in the following summer for the warm and cold events. However, a robust asymmetry was found in long decaying cases, with a prolonged and re-intensified La ni?a in the following winter. The asymmetry for long decaying cases starts from the westward extension of the zonal wind anomalies in a mature winter, and is further contributed to by the air-sea interaction over the tropical Pacific in the following seasons.

关键词：拉尼娜现象不对称性厄尔尼诺衰减海气相互作用持续时间纬向风异常热带太平洋

Situation and Strategies of the Maternal and Infant Health in Tunisia

在线全文

学校读者我要写书评

暂无评论

Journal of Reproduction and Contraception 2005年第1期16卷 57-64页

作者： Gueddana n Ghérissi A Esseghari R General Director. national Board for Family and Population. Tunisia Unit of research on evaluation in health. Département de Médecine Communautaire B. Facultéde Médecìnede Tunis Tunisia International Training and Research Centre on Reproductive Health. national Board for Family and Population Tunisia

This paper presents then makes a retrospective and descriptive evaluation of the Tunisian strategy implemented to reduce maternal and infant mortality and morbidity. The objectives of this bibliography work are to make a diagnosis of the situation of the maternal and infant mortality and morbidity, to develop the philosophy and the orientations of the strategic axis and to underline the keys of the success as well as the limits of the strategy.

关键词： maternal mortality neonatal morbidity monitoring maternal deaths causes of maternal deaths

在线全文

学校读者我要写书评

暂无评论

补阳还五汤治疗脑梗死恢复期患者的临床疗效

川北医学院学报 2024年第7期39卷 928-931页

作者：凌东波陈凤兰何日晶温庆辉张志斌黄小琼李轩东莞市人民医院检验科广东东莞523000 东莞市人民医院中医科广东东莞523000 东莞市人民医院药剂科广东东莞523000 东莞市人民医院神经内科广东东莞523000

目的:探究补阳还五汤治疗脑梗死恢复期患者的临床疗效。方法:按照治疗药物不同将84例气虚血瘀型脑梗死恢复期患者分为中药组和常规组,每组各42例。常规组采用常规药物治疗;中药组联合补阳还五汤辅助治疗。比较两组治疗前、治疗4周后的... 详细信息

目的:探究补阳还五汤治疗脑梗死恢复期患者的临床疗效。方法:按照治疗药物不同将84例气虚血瘀型脑梗死恢复期患者分为中药组和常规组,每组各42例。常规组采用常规药物治疗;中药组联合补阳还五汤辅助治疗。比较两组治疗前、治疗4周后的中医症候积分、神经功能、认知功能、肢体运动能力。结果:治疗4周后,两组患者中医症候积分各维度及总分、血清超敏C反应蛋白(hs-CRP)、血栓调节蛋白(TM)水平均低于治疗前,且中药组低于常规组(PnF)水平、蒙特利尔认知评估量表(MoCA)评分、Fugl-Meyer运动功能评分(FMA)均较治疗前升高(PnF水平和认知功能,促进肢体运动恢复。

关键词：脑梗死气虚血瘀型补阳还五汤脱氢表雄酮脑源性神经营养因子认知功能

SynTHESIS OF POLy(GLUTAMIC ACID-co-ASPARTIC ACID) VIA COMBInATIOn OF n-CARBOXyAnHy.riDE rinG OPEnInG POLyMEriZATIOn WITH DEBEnZyLATIOn

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2013年第12期31卷 1706-1716页

作者： Wei-xi yang Ling-ling Wang Han Zhu ri-wei Xu 吴一弦 State Key Laboratory of Chemical Resource Key Laboratory of Carbon Fiber and Functional Polymers(Ministry of Education)Beijing University of Chemical Technology

The random copolymers of glutamic acid （LG） and aspartic acid （ASP）, poly（LG-co-ASP）, with designed compositions could be successfully synthesized via combination of n-carboxyanhy.ride ring opening copolymerization with debenzylation. ring opening copolymerizations of y：benzyl-L-glutamate n-carboxyanhy.ride （BLG-nCA） and β-benzyl-Laspartate n-carboxyanhy.ride （BLA-nCA） were carried out by using different amines including triethylamine （TEA）, diethylamine, n-hexylamine （nHA）, triphenylamine, diphenylamine or aniline as initiators. All the 6 amines were highly efficient to get well-defined poly（BLG-co-BLA） copolymers with designed compositions although the polymerizations proceeded via different mechanisms （normal amine mechanism or/and activated monomer mechanism）, which are based on chemical structure of amines. The molecular weights of poly（BLG-co-BLA） copolymers could be mediated by both TEA concentration and polymerization time. Then, debenzylation ofpoly（BLG-co-BLA） copolymers was conducted to prepare the corresponding hydrophilic random eopolymers of poly（LG-co-ASP） with a-subunit structure in ASP structural units. The contents of LG structural units in poly（LG-co-ASP） copolymers matched with those of BLG-nCA in nCA-monomer feeds in ring opening copolymerizations initiated by nHA or TEA and were closed to the theoretical line. The diblock copolymer of poly（BLG-b-BLA） could also be synthesized via living nCA ring opening copolymerization by sequential addition of BLG- nCA and BLA-nCA.

关键词： Peptide ring opening polymerization Copolymer Glutamic acid Aspartic acid.

Debris flow impact on flexible barrier: effects of debrisbarrier stiffness and flow aspect ratio

在线全文

学校读者我要写书评

暂无评论

Journal of Mountain Science 2019年第7期16卷 1629-1645页

作者： SOnG Dong-ri ZHOU Gordon G.D CHOI Clarence Edward ZHEnG yun Key Laboratory of Mountain Hazards and Earth Surface Process/Institute of Mountain Hazards and Environment Chinese Academy of SciencesChengdu 610041China University of Chinese Academy of Sciences Beijing 100049China Department of Civil and Environmental Engineering Hong Kong University of Science and TechnologyClear Water BayKowloonHong Kong SARChina The HKUST Jockey Club Institute for Advanced Study Hong Kong SARChina

Conventionally,flexible barriers are rated based on their ability to resist a free-falling boulder with a particular input ***,there is still no well-accepted approach for evaluating performance of flexible barrier under debris flow *** this study,a large-nonlinear finite-element model was used to back-analyze centrifuge tests to discern the effects of impact material type,barrier stiffness,and flow aspect ratio(flow height to flow length)on the reaction force between the impacting medium and flexible *** show that,in contrast to flexible barriers for resisting rockfall,the normal impact force induced by the highly frictional and viscous debris is insensitive to barrier *** is because the elongated distributions of kinetic energy are mainly dissipated by the internal and boundary shearing,and only a small portion is forwarded to the ***,a new stiffness number is proposed to characterize the equivalent stiffness between a debris flow or a boulder,and a flexible *** the circumstance of an extremely elongated debris flow event,i.e.,low aspect ratio,the load on a barrier is dominated by the static component and thus not sensitive to the barrier stiffness.

关键词： Debris flow Flexible barrier Impact Stiffness Flow aspect ratio