检索结果-南通市图书馆

不同架式对‘南太湖特早’葡萄果实香气成分及品质的影响

在线全文

学校读者我要写书评

暂无评论

中国农业科技导报 2024年第1期26卷 201-213页

作者：张海军张娟贾毅男王江龙冯丽宁夏金邑澜葡萄酒有限公司宁夏永宁750100 宁夏农业学校银川750021 宁夏大学食品与葡萄酒学院银川750021

为探索不同栽培架式对葡萄果实香气成分和品质的影响,以温棚种植的倾斜棚架栽培与常规“厂”字形栽培(CK)的6年生‘南太湖特早’葡萄为试验材料,对倾斜棚架不同结果部位(前部,C1;中部,C2;后部,C3)的果实性状、挥发性香气物质进行评价,利... 详细信息

为探索不同栽培架式对葡萄果实香气成分和品质的影响,以温棚种植的倾斜棚架栽培与常规“厂”字形栽培(CK)的6年生‘南太湖特早’葡萄为试验材料,对倾斜棚架不同结果部位(前部,C1;中部,C2;后部,C3)的果实性状、挥发性香气物质进行评价,利用Flavour Spec■气相离子迁移谱联用仪(gas chromatography-ion mobility spectrometre,GC-IMS)对‘南太湖特早’葡萄进行香气成分分析,测定树体和浆果的相关理化指标。结果表明,‘南太湖特早’葡萄采用倾斜棚架栽培,与棚架其他结果部位及CK相比,从C1部位开始结果枝基粗依次增加,C1浆果的糖酸比适宜,花色苷含量最高,为438.69 mg·L^(-1),比C2、C3和CK分别增加21.4%、108.1%和8.9%。棚架各结果部位的酯类、醇类和醛类香气总量均高于CK,酯类香气物质C1最高,为4944.24μg·L^(-1),比C2、C3和CK分别增加1.5%、21.9%和37.9%;醇类香气物质总量C1最高,为15930.07μg·L^(-1),比C2、C3和CK分别增加了5.8%、7.7%和1.3%,但各结果部位与CK差异均不显著(P>0.05);C1结果部位的醛类总量最高,为8865.41μg·L^(-1),比C2、C3和CK分别增加1.5%、6.6%和17.2%。结果部位C1处的挥发性香气物质丁酸甲酯、(E)-2-己烯醇和α-蒎烯的香气活性值最大,可作为葡萄主要的呈香物质,C1、C3和CK浆果中的挥发性香气种类含量较多,香气更加突出;C1在甜香味上表现更加典型、浓郁。不同架式不同结果部位的‘南太湖特早’葡萄表现出不同的香气特征和风味,研究结果为‘南太湖特早’葡萄的栽培架式选择和风味机理的形成提供理论参考。

关键词： ‘南太湖特早’葡萄不同架式香气成分果实品质

高瓦斯矿井合理封孔长度分析及囊袋带压封孔技术

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

陕西煤炭 2024年第3期43卷 79-82页

作者：王江龙雷腾飞陕西黄陵二号煤矿有限公司陕西延安727307

为确定适合陕西黄陵二号煤矿顺层瓦斯抽采钻孔的合理封孔长度,开展基于钻孔应力状态分布特征的封孔长度分析,并运用巷道弹塑性软化模型定量得到符合黄陵二号煤矿地质条件的瓦斯抽采钻孔峰后应力升高区半径,通过理论计算确定该矿井的最... 详细信息

为确定适合陕西黄陵二号煤矿顺层瓦斯抽采钻孔的合理封孔长度,开展基于钻孔应力状态分布特征的封孔长度分析,并运用巷道弹塑性软化模型定量得到符合黄陵二号煤矿地质条件的瓦斯抽采钻孔峰后应力升高区半径,通过理论计算确定该矿井的最佳封孔长度为12 m。在此基础上应用双囊袋一体化封孔技术替代传统聚氨酯材料实施封孔,预抽钻孔平均瓦斯浓度由14.2%提升至30.2%,取得良好的瓦斯抽采效果。

关键词：瓦斯预抽封孔长度钻孔应力峰后应力带压注浆

Improving electrical and thermal properties synchronously via introducing CsPbBr_(3)QDs into higher manganese silicides

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2022年第16期111卷 279-286页

作者： Qing wang Zhiliang Li Xiaofeng Yang Xin Qian Linjuan Guo jianglong wang Dan Zhang Shu-Fang wang Key Laboratory of High-precision Computation and Application of Quantum Field Theory of Hebei Province College of Physics Science and TechnologyHebei UniversityBaoding 071002China Hebei Key Lab of Optic-Electronic Information and Materials College of Physics Science and TechnologyHebei UniversityBaoding 071002China

Higher manganese silicide(HMS)is a P-type medium temperature thermoelectric(TE)material,which has attracted widespread attention over the past few decades due to its remarkable mechanical properties,excellent chemical and thermal stability,as well as the non-toxicity,abundance and competitive *** peak power factor(PF)of HMS is as high as~1.50×10^(-3)W m^(-1)K^(-2)because of its intrinsic high electrical conductivity and Seebeck ***,the thermal conductivity of HMS is also high,resulting in relatively low z T *** nano-dispersion in the matrix is one of the most effective methods to enhance the TE properties via reducing the lattice thermal conductivity significantly without drastic changes on the other *** this study,Cs Pb BrQDs with uniform size were synthesized and introduced into HMS *** PF(at 823 K)was enhanced to 1.71×10^(-3)W m^(-1)K^(-2),which is improved 14.0%approximately compared with that of pure HMS owing to the combined effect of element doping and energy *** lattice thermal conductivity(at 823 K)decreased from 2.56W mKto 1.99 W mKsynchronously(~22.0%)due to the intensive phonon scattering caused by Cs doping,and the embedding of Pb riched CsPbBr_(3)QDs and Pb QDs.A maximum z T value of 0.57(823 K)is achieved in Cs Pb BrQDs/HMS composites,which is 36.0%higher than that of pure ***,for other TE materials,it is also feasible to improve the TE properties via introducing metastable quantum dots.

关键词： Thermoelectric material Higher manganese silicide Quantum dot Figure of merit Inclusion

在线全文

学校读者我要写书评

暂无评论

加服宣肺平喘汤治疗老年支气管哮喘临床观察

广西中医药 2024年第3期47卷 10-13页

作者：王江龙宋旭初樊金良张钊旺西华县中医院河南周口466699 周口市中医院河南周口466099

目的:探讨宣肺平喘汤辅助常规西药治疗老年支气管哮喘的临床疗效。方法:选取98例老年支气管哮喘患者,采用随机数字表法分为中药辅助组和西药组,每组49例。西药组采用小剂量氨茶碱口服、吸入用布地奈德混悬液雾化吸入治疗,中药辅助组在... 详细信息

目的:探讨宣肺平喘汤辅助常规西药治疗老年支气管哮喘的临床疗效。方法:选取98例老年支气管哮喘患者,采用随机数字表法分为中药辅助组和西药组,每组49例。西药组采用小剂量氨茶碱口服、吸入用布地奈德混悬液雾化吸入治疗,中药辅助组在西药组治疗基础上加服宣肺平喘汤。两组疗程均为2个月,治疗后观察比较两组临床疗效、肺功能相关指标[呼气峰流速(PEF)、第1秒用力呼气容积(FEV1)、用力肺活量(FVC)、FEV1/FVC]、氧化应激指标[活性氧(ROS)、过氧化脂质(LPO)、8-羟基脱氧鸟苷(8-OHdG)、总抗氧化能力(T-AOC)]及不良反应发生情况。结果:中药辅助组总有效率为95.92%,高于西药组的75.51%(P0.05)。结论:宣肺平喘汤辅助常规西药治疗老年支气管哮喘可改善肺功能,减轻氧化应激状态,提高疗效。

关键词：支气管哮喘宣肺平喘汤氨茶碱布地奈德

Effect of sintering temperature on thermoelectric properties of CdO ceramics

在线全文

学校读者我要写书评

暂无评论

Journal of Advanced Ceramics 2015年第3期4卷 226-231页

作者： Xinran ZHANG Huiling LI jianglong wang Hebei Key Lab of Optic-electronic Information and Materials College of Physics Science and TechnologyHebei UniversityBaoding 071002China

The effect of sintering temperature on thermoelectric properties of CdO ceramics was investigated by solid-state reaction method within the temperature range of 700-1000℃.With the increase of sintering temperature,both the grain size and the carrier concentration of these samples increased,while the Seebeck coefficient *** highest dimensionless figure of merit ZT,0.34,was obtained at 1023 K for the sample sintered at 800℃,suggesting the potential application of CdO ceramics in thermoelectric(TE)devices.

关键词： thermoelectric(TE) CdO ceramics sintering temperature solid-state reaction

Transparent conducting properties of c-axis-oriented NaxCoO2 epitaxial thin films

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2018年第10期61卷 104-107页

作者： DaChao Yuan jianglong wang Nian FU XiaoLin Wu YueJin Ma ShuFang wang College of Mechanical and Electrical Engineering Agricultural University of Hebei Baoding 071001 China Hebei Key Lab of Optic-electronic Information and Materials College of Physics Science and Technology Hebei University Baoding 071002 China

Transparent conducting oxides(TCOs)have attracted intensive attention because of their broad application in photoelectric devices such as solar cells,light-emitting diodes,and flat-panel *** TCOs used in industry,including tin(IV)oxide(SnO_2),indium oxide(In_2O_3),indium tin oxide(ITO),and zinc oxide(ZnO),are primarily n-type semiconductors[1-3].Suitable p-type TCOs are still

关键词：取向附生锌氧化物性质电影太阳能电池 TCO 应用程序 MoO3

Electrical and thermal transport properties of CdO ceramics

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2014年第9期57卷 1644-1648页

作者： Lü Qing wang ShuFang LI LongJiang wang jianglong DAI ShouYu YU Wei FU GuangSheng Hebei Key Lab of Optic-Electronic Information and Materials College of Physics Science and Technology Hebei University

High temperature electrical and thermal transport properties,that is,electrical conductivity,Seebeck coefficient and thermal conductivity,of CdO ceramics have been *** of the good electrical properties and low thermal conductivity,the dimensionless figure-of-merit ZT of the CdO ceramics reaches 0.34 at 1023 *** value is comparable to the best reported ZT for the n-type oxide ceramic thermoelectric materials and remains as potential to be further improved by porosity controlling or nanostructuring.

关键词：氧化物陶瓷电性能输运性质氧化镉热传导性传输性能纳米结构热电材料

Photovoltaic characteristics of Ca_3Co_4O_9/Nb-doped SrTiO_3 heterojunction

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2012年第5期55卷 772-775页

作者： wang ShuFang LIU FuQiang YAN GuoYing CHEN ShanShan CHEN JingChun wang jianglong Yu Wei FU GuangSheng Hebei Key Lab of Optic-electronic Information and Materials Hebei UniversityBaoding 071002China

Ca3Co4O9/Nb-SrTiO3 heterojunction with good rectifying behavior at room temperature was fabricated by growing a layer of Ca3Co4O9 film on the 1wt% Nb-doped SrTiO3 substrate by means of the chemical solution deposition technique.A large open-circuit voltage signal with the response time of tens of nanosecond was observed at room temperature when the Ca3Co4O9 layer of the heterojunction was illuminated under the 308 nm irradiation and no voltage signal was detected under the 10.6 μm irradiation.A mechanism based on the photovoltaic effect of a p-n junction was proposed to explain the experimental *** present work shows a great potential of this new heterojunction as photoelectric devices.

关键词：异质结光伏特性钛酸锶 SrTiO3 电压信号沉积技术化学溶液信号检测

Pleniglacial millennium-scale climate variations in northern China based on records from the Salawusu River Valley

在线全文

学校读者我要写书评

暂无评论

Journal of Arid Land 2012年第3期4卷 231-240页

作者： FengNian wang BaoSheng LI jianglong wang XiaoHao WEN DongFeng NIU ZhiWen LI YueJun SI YiHua GUO ShuHuan DU School of Geography South China Normal UniversityGuangzhou 510631China State Key Laboratory of Loess and Quaternary Geology Institute of Earth EnvironmentChinese Academy of SciencesXi'an 710061China Chenghai Middle School Shantou 510601China College of Earth Science East China Institute of TechnologyNanchang 330013China Key Laboratory of Marginal Sea Geology South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China

Situated in the Salawusu River Valley, southeast of China＇s Mu Us Desert, the MGS2 （Milanggouwan section） portion of the Milanggouwan stratigraphic section records 5.5 sedimentary cycles consisting of alternations between dune sand deposits and fluvial or lacustrine facies. We analyzed the grain-size and CaCO3 distributions in MGS2, and found that Mz （mean particle diameter） and o （standard deviation） displayed clear variations in peaks and valleys within different sedimentary facies. The CaCO3 content averaged 0.4% in the dune sand deposits, 1.43% in the fluvial facies, and 8.82% in the lacustrine facies. Both the grain-size distribution and CaCO3 contents, which equal the indicators for the alternation among the sedimentary facies, suggest the occurrence of 5.5 cycles. These results suggest that the observed cycles mainly resulted from fluctuations between a cold and dry winter monsoon climate and a warm and humid summer monsoon climate, and that the MGS2 portion experienced at least 5.5 fluctuations between these two extremes. This high-frequency climatic fluctuation indicates a strong influence of millennium-scale variations in the strength of the East Asian winter and summer monsoons in our study area during the Pleniglacial.

关键词： Salawusu River Valley Pleniglacial paleoclimatic indices CaCO3 grain-size