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南昌大学学报（理科版）

南昌大学学报（理科版）

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Journal of Nanchang University(Natural Science)
本刊是南昌大学主办的自然科学综合性学术理论刊物（季刊、国内外公开发行）。1963年创刊，原名《江西大学学报》（自然科学版），1993年更为现名。主要刊登数学、物理学、化学、生物学、食品科学、电子科学、计算机科学、材料科学等学科基础研究和应用研究方面的研究报告、简报、快报等学术论文，注重反映南昌大学理科各学科的最新科研成果，促进学术交流。适量择优登校外来稿。来稿要具有新颖性、学术性和科学性，一式两份，务须论点明确，文字精炼，数据和结果可靠。凡属国家和省部级科研基金资助项目（标出项目编号）的论文，本刊自收稿之日起力争在半年内刊出。
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  • 发文量：3383
  • 被引量：483
  • H指数：3
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  • 国内刊号/CN：36-1193/N
    国际刊号/ISSN：1006-0464
  • 发行周期：双月刊
    邮发代号：44-19
  • 主管单位：南昌大学
    主办单位：南昌大学
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  • 邮箱：NCDL@chinajournal.net.cn
  • 地址：南昌市南京东路235号
  • 邮编：330047
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南昌大学学报（理科版） >2021年第6期

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  • 摘要：A new model incorporated physicochemical properties of the amino acids,protein secondary structure and residue disorder information was proposed in the current study,which is used to predict Tau protein serine phosphorylation sites based on information entropy.We also discussed the influences of individual features on Tau protein serine phosphorylation.Epitope analysis showed that sequence motifs of amino acids,the coil structure,and residue disorder regions around the serine phosphorylation sites all could contribute to the phosphorylation sites identification.By using the 10-fold cross-validation,the predictive accuracy and Matthews correlation coefficient of the model were 83.7 ％ and 65.1％,respectively.These results indicate that the proposed method in this work can effectively identify phosphorylation sites.%基于信息熵,融合氨基酸的物理化学性质、蛋白质的二级结构和残基的无序信息构建了Tau蛋白丝氨酸磷酸化修饰位点预测的新模型.分别探讨了每种特征对Tau蛋白丝氨酸磷酸化修饰位点的影响,特征分析结果表明,氨基酸的序列模体、卷曲结构和无序区域均有助于识别丝氨酸磷酸化修饰位点.通过10倍交叉验证,丝氨酸磷酸化修饰位点预测的准确率和马氏相关系数分别达到83.7％和65.1％,表明本文构建的模型可用于对Tau蛋白丝氨酸磷酸化修饰位点的有效预测.
  • 摘要：Nutritional components of muscle of Procambraus clarkii in P'o-yang lake were determined using conventional analysis methods.The results showed that the contents of moisture,crude protein,crude fat and crude ash of the fresh muscles were 79.59 ％,18.70 ％,0.98 ％ and 1.24 ％,respectively.The contents of calcium was 443mg/100 g and phosphorus 1 200.00 mg/100 g (dry weigh).The total amino acid was 83.32％(Tryptophan was damaged in acidolysis).The amount of essential amino acid was measured to be 28.25％,which was 33.91％ of total amino acid.The content of four tasty amino acids was 31.86％.The percentage of essential fatty acid was 14.38％.C16∶ 0 and C18∶1 were the most abundant fatty acids,whose proportions were 21.50％ and 21.59％ respectively.EPA and DHA contents were respectively 9.17％ and 1.86％.SFA,MUFA and PUFA of fatty acid were found to be 33.59％,30.27％ and 25.58％ respectively.Procambraus clarkii in Poyang lake,which contained high protein and low fat,could be a kind of eutrophy freshwater product and worthy breeding vigorously.%利用常规分析方法对鄱阳湖克氏原螯虾肌肉的营养成分进行测定,结果表明:肌肉中水分含量79.59％,粗蛋白含量18.70％,粗脂肪含量0.98％,粗灰分含量1.24％.钙含量443mg/100 g干重,磷含量1 200.00mg/100g干重.氨基酸总量83.32％(色氨酸因酸解破坏),必需氨基酸含量28.25％,占氨基酸总量的33.91％,4种鲜味氨基酸的总含量为31.86％.必需脂肪酸含量14.38％,脂肪酸含量以C16∶0和C18∶1为最丰富,比例分别为21.50％和21.59％；EPA和DHA含量分别为9.17％和1.86％.脂肪酸中饱和脂肪酸(SFA)比例为33.59％,单不饱和脂肪酸(MUFA)比例为30.27％,多不饱和脂肪酸(PUFA)比例为25.58％.鄱阳湖克氏原螯虾是一种高蛋白低脂肪、营养丰富的淡水产品,值得大力推广养殖.
  • 摘要：Luminescent Cementitious Materials (abbr.LCM) were prepared with cement as binder and rare earth luminescent powder and reflective powder as addmixrures.Flexural strength,compressive strength,luminescent brightness,afterglow time,and micromorphology of LCM were studied by means of strength tests,fluorescence spectrophotometer,luminance meter and ESEM.Results show that when the dosage of luminescent powder are 15 ％-45％ and the dosage of reflective powder are 0％-25％,flexural strength and compressive strength of LCM at 28 days are 6.5 MPa-8.0 MPa and 40 MPa-55 MPa,respectively.Luminescent brightness of LCM is increased with increasing luminescent powder dosage,especially initial luminescent brightness,and afterglow time of LCM is prolonged with increasing reflective powder dosage.Luminescent brightness and afterglow time of direct sunlight after 1 hour are superior to those of 40W fluorescent lamp after 5 hours.Luminescent powder and reflective powder are not participate in hydration reaction,luminescent powder glues cement hydration product,reflective powder was wrapped by cement hydration product,which together form more dense structure.It was suggested that the dosage of luminescent powder should be 15％-45％ and the dosage of reflective powder should be 0％-25％.%以水泥为基体材料,利用稀土发光材料、反光材料制备出水泥基发光材料(Luminescent Cementitious Materials,简称LCM),采用强度试验、荧光分光光度计、亮度计、ESEM等测试手段研究LCM的抗折和抗压强度、发光亮度和余辉时间以及微观形貌.结果表明,在发光粉掺量15％～45％、反光粉掺量0％～25％范围内,LCM的28 d抗折强度和抗压强度分别在6.5～8.0 MPa和40～55 MPa之间；随着发光粉掺量的增加,LCM的发光亮度增大,特别是对初始发光亮度有较大影响,随着反光粉掺量的增加,LCM的的余辉时间延长；LCM在太阳光照1h后的初始发光亮度、余辉时间均比在40 W日光灯照5h后的好；LCM中发光粉、反光粉均不参与水化反应,发光粉与水泥水化产物胶结,反光粉被水泥水化产物包裹,共同形成比较致密的结构.建议LCM中发光粉的掺量为15％～25％,反光粉的掺量为0～15％.
  • 摘要：In the case of Jiangxi Yinhe Scale Eucommia Pig Breeding Base,the environmental load and local sustainability of the scale breeding waste biomass integrated utilization project was evaluated by using the emergy theory and method.The results indicated that the integrated project transfered the breeding waste into the efficient bio-energy embedded in biogas,biogas slurry and biogas residue through the process of anaerobic digestion,which in turns feedbacked into the system through the bio-energy utilization engineering.In Yinhe scale pig breeding waste biomass integrated utilization project,more reliance on the local recycling renewable resource input reduced the systematical demand for the non-renewable emergy purchased.The recycling utilization of the breeding waste,such as pig manure,urine,etc.,decreased the negative output of the system contaminants.All these make the breeding waste integrated project system illustrated an obvious advantage in the value of indices of R％,EYR,and ELR.In addition,the project realized both the green pig breeding and the organic planting via the circulating energy between the breeding and planting.The output of Eucommia pig and green vegetables would bring a considerable premium income for the enterprises.%应用能值理论和方法,以江西银河杜仲规模绿色生猪养殖基地为例,对规模养殖废弃物生物质综合利用工程的环境承载力及可持续能力进行分析评价.研究结果表明:综合利用工程通过沼气工程将规模养殖废弃物转化为沼气、沼液、沼渣等高效生物能,而这些生物能又通过“三沼”利用工程反馈回系统.大量废弃物再生能值的反馈投入不仅减少了系统对不可再生辅助能投入的需求,且减少了系统污染物的负产出,从而综合利用工程系统在资源系统的可更新率、能值产出率和环境承载率等方面都有明显的优势.同时,工程通过能量在养殖业和种植业间循环流动,实现绿色养殖和种植,为市场提供了绿色生猪及绿色蔬菜的同时也为企业带来可观的溢价收入.
  • 摘要：The p-nitrophenylcarbamoylated β-cyclodextrin chiral stationary phase(NPCSP) was prepared by the click chemistry and enantioseparation of atenolol,metoprolol and esmolol was studied under the polar organic mode.It shows that the enantioseparation of them has achieved with satisfactory result under optimized chromatographic conditions and the chiral stationary phase has higher separation efficiency.The related mechanism of chiral separation is discussed based on the structural feature of β-blockers drug in this paper.This method is convenient,efficient and good repeatability.%通过click反应合成对硝基异氰酸苯酯衍生化β-环糊精键合SBA-15硅胶手性固定相(NPCSP),在极性有机溶剂模式下对阿替洛尔、美托洛尔、艾司洛尔3种β-受体阻滞剂类药物进行手性分离的研究.实验结果表明,在优化的色谱条件下获得了较好的分离,所制备的手性固定相具有较高的分离效率.针对β-受体阻滞剂类药物的结构特点,对相关手性分离机理进行了探讨.本方法具有简便、快捷、高效及重复性好等特点.
  • 摘要：以三氟化硼乙醚络合物为催化剂,以氢氧化钠为成环反应的闭环剂,利用1,4-环己烷二甲醇(CHDM)和环氧氯丙烷(ECH)为原料合成了1,4-环己烷二甲醇二缩水甘油醚(CHDMGE).研究了催化剂三氟化硼乙醚络合物用量、ECH和CHDM摩尔比,以及成环反应温度这些因素对其合成反应的影响,结果表明较好的合成反应条件是三氟化硼乙醚络合物质量分数为CHDM和ECH总量的0.40％,ECH和CHDM较佳摩尔比为3.6∶1.0,NaOH和CHDM较佳摩尔比为2.8∶1.0,以及较佳的成环反应温度为30℃.同时,把三芳基锍鎓六氟锑酸盐作为引发剂,加入到CHDMGE中制备了阳离子型紫外光固化树脂,其紫外光固化膜的拉伸强度36.59 MPa,杨氏模量1264.52 MPa,断裂伸长率7.16％.%1,4-cyclohexanedimethanol glycidyl ether(CHDMGE) was synthesized with 1,4-cyclohexanedimethanol(CHDM) and epichlorohydrin(ECH) as raw materials,using boron trifluoride ether complex as the catalyst,and sodium hydroxide as the closing ring agent.The closing ring temperature,the dosage of the catalyst,and the moral ratio of ECH to CHDM were optimized.The optimal synthesizing conditions are 0.40％ of the catalyst mass fraction,3.6/1.0 as the ratio of ECH/CHDM,2.8/1.0 as the ratio of NaOH/CHDM,and the closed ring reaction temperature 30 ℃.Meanwhile,the cationic type UV-curing coating was prepared with CHDMGE and triphenylsulphonium hexafluoroantimonate (UVI-6976).The mechanical properties of the UV-cured films were determined,giving 36.59MPa of tensile strength,1264.52MPa of Young's modulus and 7.16 ％of elongation at tear.
  • 摘要：For a system P of polynomials over R in n variables and an open hypercuboid S in Rn,where R is the field of real numbers,we present an algorithm for finding at least one real zero in each semi-algebraically connected component of ZeroR (P) ∩ S.In order to represent accurately the resulting real zeros,we adopt the so-called rational univariate representations.Furthermore,we give another algorithm for deciding whether the resulting points belong to the hypercuboid S.With the aid of the computer algebraic system Maple,these algorithms are made into a general program.%对于给定的一个n元实多项式系统P和Rn中一个开超长方体S,给出了一个有效算法,使得在ZeroR (P)∩S的每一个半代数连通分支上能找到至少一个零点.为精确起见,所找的实零点通过所谓的区间有理单元表示来描述.为处理实例,有关算法在Maple软件平台上被编制成一个通用程序.
  • 摘要：By using the notion of asymptotic logarithm likelihood ratio,a class of strong deviation theorems for the indicator function of Borel sets on the real line of arbitrary sequence was studied,with dependent continuous random variables on the distribution function of the continuous nonhomogeneous Markov chain.The limit properties of the indicator function of Borel sets on the real line was investigated by constructing variable product density functions and a nonnegative super martingale.A class of strong limit theorems represented by the inequalities was obtained as well.The results showed that the bounds of the deviation should be dependent on the sample points.%通过引入渐近对数似然比的概念,研究任意相依的连续型随机变量序列在实直线上的Borel集的示性函数关于连续性非齐次马氏链分布函数的一类强偏差定理.采用构造元乘积密度函数及非负上鞅的方法,研究实直线上的Borel集的示性函数的一类极限性质,得到相依连续型随机变量序列的一类以不等式表示的强极限定理,其偏差依赖于样本点.
  • 摘要：FeCuNbSiB soft magnetic powder/silicon rubber flexible stress-sensitive composite ("FeCuNbSiB/SiR composite" for short) was fabricated successfully by mechanical blending and precise cast pressure hot forming method.FeCuNbSiB soft magnetic powder was used as the functional filler particles and ternary block silicone rubber as the matrix.The microscopic morphology of FeCuNbSiB particles and their distribution in the silicon rubber matrix were also investigated.The influence factors of FeCuNbSiB powder include heat treatment,content,particle size and the thickness of its composite.It is shown that FeCuNbSiB particles mostly present polygonal shapes and their dispersion in the silicon rubber matrix were homogeneous when the particle diameter is less than 30 μm.The soft magnetic properties of the FeCuNbSiB powder could be improved remarkably after heat treatment at 480 ℃ for 1 h.FeCuNbSiB/SiR composite presents the best stress sensitive character and excellent stress-impedance stability at the conditions of 27.5 vol％ powder content,10 μm particle diameter and 200±2 μm thickness,which could be explored as the sensitive cell of new type flexible stress sensor.%以FeCuNbSiB软磁粉为功能填充粒子,三元嵌段有规共聚硅橡胶为基体,采用机械共混和精密铸压热成型方法制备了FeCuNbSiB软磁粉/硅橡胶柔性复合材料薄膜(简称“FeCuNbSiB/SiR复合薄膜”).分别观测了填充粒子FeCuNbSiB软磁粉及其复合薄膜的显微形貌,重点研究了FeCuNbSiB软磁粉的热处理、含量、粒径及其硅橡胶复合薄膜厚度等因素对复合薄膜力敏特性的影响.研究结果表明:FeCuNbSiB软磁粉微观结构呈多角片状,当粒径小于30 μm,软磁粉在硅橡胶基体中具有良好的分散性；经480℃热处理1h后的FeCuNbSiB软磁粉的磁性能显著提高,当其体积分数为27.5 vol％,粒径10μm且复合薄膜厚度为200±2μm时,FeCuNbSiB/SiR复合薄膜具有最佳的力敏特性和良好的应力阻抗重复稳定性,可用作新型柔性力传感器敏感元的开发.
  • 摘要：研究了菊科植物林泽兰(Eupatorium lindleyanum DC.)中丰富的三萜类化学成分,采用溶剂萃取和各种正反相色谱技术分离纯化,利用高分辨质谱,一维及二维核磁共振等技术鉴定其结构.共分离鉴定得到8个三萜类化合物,其中一个新三萜类化合物:eucalyptic acid(Ⅰ)、eucalyptic acid B(Ⅱ)、eucalyptolic acid(Ⅲ)、麦珠子酸(al-phitolic acid,Ⅳ)、桦木酸(betulinic acid,V)、3β,30-二羟基-羽扇豆醇酸(3β,30—dihydroxyiup-20(29)-en-28-oic acid,Ⅵ)、3β-羟基-30-降羽扇豆烷-20-酮-28-酸(platanic acid,Ⅶ)、山楂酸(maslinic acid,Ⅷ).所有化合物均为首次从该种植物中分离得到.%To investigate the prolific triterpenes in Eupatorium lindleyanum DC.,The compounds were isolated by repeated chromatography on reversed-phase columns MCI gel columns,normal-phase Silica gel columns and Sephadex LH-20 column The structures were elucidated on the basis of extensive spectroscopic analysis(1D-NMR,2D-NMR,LC-ESIMS,HRESI-MS,EI-MS) and by comparison of the data with those reported data in the literature.Eight triterpene compounds:eucalyptic acid(Ⅰ)、eucalyptic acid B(Ⅱ)、eucalyptolic acid(Ⅲ) 、alphitolic acid(Ⅳ)、betulinic acid(Ⅴ)、3β,30-dihydroxyiup-20 (29)-en-28-oic acid(Ⅵ)、platanic acid(Ⅶ)、maslinic acid(Ⅷ).were isolated for the first time from Eupatorium lindleyanum DC.
  • 摘要：In the current study,the movement and survival time of the sperms from Hyriopsis schlegelii in three kinds of solution were investigated by using a eosin-Y dye method.It was observed that the sperm had a bullet-shaped head and a flagella tail,the overall length was 254.91± 20.03μm,the head length was 32.33±2.15μm,the head width was 16.60±3.29μm and the length of the flagella was about 216.67±≈19.73 μm.The longest survival time of the sperms was 6 h in the normal saline,whereas the shortest time was in pond water,being about 4.5h.There were three cases on the motion modes of sperm:fast linear motion,curved rotation and swaying movement.There results were very important for us to determine the establishing families from Hyriopsis schlegelii.%池蝶蚌精子具有子弹形头部及细长均匀鞭毛尾,属鞭毛型.全长为254.91±20.03 μm；头部子弹形,长为32.33±2.15 μm,宽为16.60±3.29 μm;鞭毛细长均匀,长为216.67±19.73μm.为了更好的计算池蝶蚌精子的存活率,本研究采用曙红Y染色的方法,观察了精子在生理盐水、池塘水和蒸馏水中的存活时间及运动方式.结果显示,精子在生理盐水中的存活时间最长,可达6h；其次是蒸馏水,约为4.5 h；最短存活时间是在池塘水中,约为4.0h.池蝶蚌精子的主要运动方式有快速直线游动、弧线运动和原地转动3种方式.快速直线游动的精子活力最高,其次是弧线运动,精子活力降低后进行原地转动.研究的结果对池蝶蚌家系的建立起重要作用.
  • 摘要：It aimed to explore the distribution changes of uNK cells in the maternal-fetal interface of human early and late pregnancy by lectin histochemical studies.The results showed that (1) in the decidua of early pregnancy,uNK cells have two forms.The mature uNK cells with large size and strongly brown staining of cellular cytoplasm and membrane,were located in the blood vessel of decidual.Another immature uNK cells with smaller size and yellow staining of cellular nucleus,were scattered between the decidual cells.(2) In the villi of early pregnancy,immature uNK cells were mainly distributed in the villous stroma.(3) uNK cell numbers of the deciduas in the late pregnancy significantly reduced compared to the firsr trimester of pregnancy (P ＜0.01).(4) the chorionic villi do not express uNK cells in the late pregnancy.Conclusions:uNK cells are mainly distributed in the uterine decidua.As the pregnancy progresses,the number of uNK cells significantly decreased.The change of spatial and temporal expression may be involved in the regulation of trophoblast cell invasion,the remodel of uterine blood vessel and immune tolerance.%通过Lectin法分析uNK细胞在人妊娠早、晚期母胎界面的分布变化.结果发现:(1)在妊娠早期的蜕膜中,uNK细胞主要有两种形式,一种是成熟uNK细胞,细胞体积较大,胞浆和胞膜呈现强烈的棕黄色染色,分布于蜕膜的血管中.另一种是未成熟uNK细胞,细胞体积较小,胞核呈现黄色染色,分布于蜕膜细胞之间.(2)在妊娠早期的绒毛组织中,uNK主要是未成熟uNK,分布于绒毛间质之间.(3)与妊娠早期蜕膜的uNK细胞数相比,至妊娠晚期,蜕膜的uNK细胞数量明显减少(P＜0.01).(4)在妊娠晚期,绒毛组织不表达uNK细胞.结论:uNK细胞主要分布于子宫蜕膜组织,且随着妊娠的进展,其表达数量明显下降.这种时空性的表达变化可能与其在调控滋养层细胞的侵袭、血管重建及免疫耐受方面密切相关.
  • 摘要：The population structure,reproductive traits and glochidium morphology of Lamprotula leai (Gray) in Poyang lake Jiangxi province were studied during January 2004 to May 2007.It was found that the distribution of shell length classes tended to be younger and smaller.The shell length of 41-70 mm and the age of 3-6 years accounted for 74.93％ and 60％ of the population respectively.L.leai were dioecious,and the sexual ratio of females to males was about 1 ∶ 1.The usual reproductive period was the middle of February to the end of April,peaking at March to early April;Gravid individuals were very sensitive to the changing of the environment.They could abort by water temperature changes sharply or catching rudely.Four demibranchia of the gills of females could develop into marsupium;Mature glochidia were nonhooked with 4 pairs of sensory hairs.The potential fecundity was 115 000-504 000 per individual (the average value was 328 090±145 730 per individual).%2004～2007年间,对鄱阳湖背瘤丽蚌(Lamprotula leai)种群组成、繁殖特性和钩介幼虫形态进行了研究.从背瘤丽蚌种群壳长组成看,优势壳长组为41～70mm,占总个体数的74.93％,年龄范围3～6龄.和历史资料比较,鄱阳湖背瘤丽蚌种群趋于小型化,低龄化.背瘤丽蚌主要繁殖特征为:雌雄异体,自然种群性比为1∶1；最小性成熟个体雄性38 mm,雌性34 mm.繁殖周期为1年1次,繁殖期为2月中旬至5月,3～4月初为妊娠高峰期.繁殖力为115～504千粒/个(均值(328.09±145.73)千粒/个).背瘤丽蚌育儿囊为四鳃型,钩介幼虫侧面观为半椭圆形,无壳钩,具4对感觉毛.
  • 摘要：An improved algorithm for 1-v-1 SVM is presented aims at the long time cost in me process of testing unclassified data.This method can reduce the number of classifiers used in the test process by using multi-vote strategy,so the time cost for testing unclassified data is reduced.The experiment proved that the improved algorithm is effective.%针对传统的1-v-1 SVM算法测试未知样本速度较慢的缺点提出了一种改进的1-v-1 SVM算法.该方法采用多轮投票策略减少测试过程中使用分类器的次数从而提高分类未知样本的速度.实验证明改进的算法是有效的.
  • 摘要：《南昌大学学报·理科版》是南昌大学主办的自然科学综合性学术理论刊物，双月刊，公开发行。1963年创刊，原名《江西大学学报（自然科学版）》，1993年更为现名。主要刊登数学、物理学、化学、生物学、食品科学、电子科学、计算机科学、材料科学、管理科学等学科基础理论研究和应用基础研究方面的研究报告、简报、快报等学术论文，注重反映南昌大学理科各学科的最新科研成果，促进学术交流。
  • 摘要：以L-谷氨酸为原料,通过一系列反应合成可生物降解的聚L-谷氨酸(PLGA)；并以N-苯基-1,4-对苯二胺和丁二酸酐为原料,利用胺基保护的方法,合成了酰胺基保护的苯胺二聚体,进一步合成胺基封端的苯胺五聚体；然后利用二氯乙烷/N-羟基丁二酰亚胺(EDC/NHS)活化PLGA上的羧基,再与胺基封端的苯胺五聚体(AP)进行偶联反应,得到了以苯胺五聚体为交联中心的电活性聚谷氨酸.并通过IR、1H-NMR、UV-vis、TGA等手段对其进行了结构表征和性能的测试.
  • 摘要：分别以CeO2和Ce(NO3)3铈前体,ZrOCl2和ZrO(NO3)3为锆前体,采用通常的共沉淀法和以双氧水为氧化剂的氧化还原共沉淀法制备Ce0.5Zr0.5O2固溶体.通过XRD、N2—BET和H2-TPR等手段表征了铈锆固溶体结构及其物理化学性质；同时以CO氧化和CH4催化燃烧作为探针反应考察其催化性能.结果表明,以不同铈前体和锆前体合成的铈锆复合氧化物均形成了具有二氧化铈立方萤石型晶相的固溶体.但是对以相同铈前体制备的铈锆固溶体,以ZrO(NO3)3为锆前体制备的催化剂比以ZrOCl2为锆前体制备的样品比表面积更大;以相同锆前体制备的铈锆固溶体,以含四价铈的盐为前体制备的样品储氧量更大,但采用含三价铈的盐氧化还原共沉淀制备的样品比表面积则更大.
  • 摘要：以FeCuNbSiB非晶粉体/ⅡR复合薄膜材料为研究对象,分别研究了该材料在固定测试频率为1 KHz下的拉伸和压缩应力阻抗效应.其中压缩速度为0.01 mm/s,压缩最大应力为1 MPa;拉伸速度为0.05 mm/s,拉伸最大应力为2.4 MPa.同时,将2种测试过程在每隔50 s时间,计算一个等效的拟合点,并将这些等效拟合点进行曲线拟合,获得相应的拟合曲线.接着我们又对拉伸应力阻抗及压缩应力阻抗等效拟合曲线经行求导处理,得出相应的能够表征应力阻抗的敏感性的函数Z’(σ).试验结果表明:拉伸过程阻抗随着应力增大而降低,压缩过程阻抗随着应力增大而增大.由于该复合薄膜的基体是丁基橡胶,适合于微小应力敏感的测试.而压缩应力阻抗方面,其耐压强度相对耐拉强度大很多,论文中只讨论了压应力范围为0～1 MPa的压应力阻抗效应.在微应力条件下,压应力阻抗敏感性能不及拉伸应力阻抗.而在大应力下其应力敏感特性较好.
  • 摘要：在对衡量融资效率的若干财务指标进行了主成分分析的基础上,对中部六省(湖北、安徽、湖南、河南、江西和山西)上市公司的融资效率差异化进行了实证分析,得出六省融资效率普遍偏低、差异化不明显,但行业间存在着明显差异；然后,通过逐步回归法,得到影响融资效率的相关因素,如融资结构、净利润、公司规模、主营业务收入等,并对这些因素进行了回归分析,得出其与融资效率关系；最后,给出提高中部六省上市公司融资效率的对策建议.
  • 摘要：从噬菌体随机肽库中淘选模拟NFLX(Norfloxacin)表位的噬菌体粒子并进行性质鉴定.以抗NFLX单克隆抗体为靶分子,对噬菌体环七肽库和十二肽库进行生物亲和淘选,以ELISA鉴定阳性克隆,进行DNA测序,采用生物信息学方法对淘选得到的模拟表位进行分析.分别得到了9个(环七肽)和8个(十二肽)能与靶分子特异性结合且能被NFLX标准品阻断的阳性克隆,其特有序列为(环七肽):X-X-X-X-X-脯氨酸-苯丙氨酸(X为任意氨基酸),以阻断效果最好的抗原模拟表位H3建立了竞争ELISA标准曲线,IC 50为:(48.07±6)ng·mL-1,检测线性范围为10～200 ng·mL-1.噬菌体展示技术可淘选得到NFLX模拟表位,淘选到的噬菌体粒子可作为NFLX的替代品建立免疫学检测方法.
  • 摘要：采用热水浸提法提取青钱柳多糖,用活性炭脱色,以脱色率和多糖保留率为指标,在单因素试验的基础上采用正交试验法对多糖脱色的最佳工艺进行优选.结果表明:活性炭吸附法对青钱柳多糖具有良好的脱色效果,最佳工艺条件为:温度为40℃,吸附时间40 min,活性炭用量1％,pH值3.5.在此条件下脱色率可达(80.3±2.1)％,多糖保留率为(55.6±2.5)％,预测模型的计算结果和试验结果基本一致.
  • 摘要：肝细胞的炎性损伤与全身性炎症引起的多器官功能障碍的发生相关,LPS可致全身性炎症,在炎症发生过程中,CD14是LPS的膜受体,可通过激活NF-κB诱导炎症相关因子的表达,CD14主要分布于细胞膜脂筏部位,脂筏是由鞘磷脂(SM)和胆固醇相互锚定,并与相关蛋白质组成的一种微空间结构,因此降低SM的合成,会降低SM在脂筏部位的含量,进而改变脂筏结构及CD14在脂筏部位的分布,最终影响炎症的发生.本研究利用干扰载体pSUPER-SMS沉默HepG2细胞鞘磷脂合酶(SMS)的表达,并检测SM在脂筏部位的含量及CD14和TNF-a的表达,结果显示SMS1和SMS2的mRNA水平表达和酶活都有显著下降(P＜0.001,n=3),SM在脂筏部位含量和CD14的表达均有显著降低(P＜0.001,n=3),导致LPS所致HepG2细胞TNF-amRNA水平的表达下降.可见SMS可通过改变CD14在脂筏部位的含量,最终影响和炎症发生相关分子TNF-a的表达.
  • 摘要：得到满足开集条件的自相似集的几乎处处最好覆盖为最好覆盖的几个充分条件以及直线上一类自相似集存在最好覆盖的一个充要条件.所得结论部分回答了[周作领,冯力.关于Hausdorff测度的精确值和拓扑熵的十二个开问题:一个最新结论的概述,非线性.2004,17(2):493-502.]中提出的一些公开问题.最后,作为对本文主要结论的应用,给出了两个例子.
  • 摘要：引入一类向量伪单调映射,在Hausdorff拓扑线性空间中,利用向量映射的锥连续条件与极大元定理,讨论具控制结构的向量拟均衡问题系统,研究该问题的有效解及强解,得到这两类解的存在性与解集的紧性,并建立这两类解之间的联系.
  • 摘要：双层规划研究的是两个各具有目标函数的决策者之间按有序的和非合作方式进行的相互作用,上层决策者优先作出决策,下层决策者在上层决策信息下按自己的利益作出反应,由于一方的行为影响另一方的策略选择和目标的实现,并且任何一方又不能完全控制另一方的选择行为,因此上层决策者要根据下层的反应做出符合自身利益的最终决策.而公交车辆配置正符合双层规划模型的思想,所以本论文采用双层规划模型来描述车辆配置与客流量之间的相互作用,从而优化公交线网的车辆配置.
  • 摘要：在人体生理酸度(pH7.4)条件下,运用荧光、紫外和圆二色谱法并结合分子模拟技术研究了甜味剂糖精钠(SSA)与人血清白蛋白(HSA)的相互作用.结果表明,SSA通过静态方式猝灭HSA的荧光,SSA在HSA上有一个结合位点位于subdomain ⅡA(site Ⅰ位),分子模拟证实了该结合位点.计算出的热力学参数焓变(△H)和熵变(△S)均为负值,表明氢键与范德华力是形成SSA-HSA复合物的主要驱动力.紫外吸光光谱与圆二色谱分析显示,SSA的存在诱导HSA的多肽链发生了部分伸展.
  • 摘要：利用4,4'-二硫代二丁酸(DTBA)和3-氨基苯硼酸(PBA)反应合成了含苯硼酸基的二硫化物DTBA-PBA,通过自组装技术将其固定于金电极表面.利用苯硼酸分子在水溶液中较温和以及易控制的条件下即可与1,2/1,3-邻二醇反应形成五元或六元环化合物的特点,将糖基化蛋白辣根过氧化物酶(HRP)共价键合于DTBA-PBA修饰电极表面,构建了用于H2O2检测的生物传感界面.采用循环伏安、计时电流等方法对传感界面的构建过程和传感器的性能进行了研究.结果表明,在8.3×10-6-5.3×10-2 mol·L-1范围内,传感器响应电流与H2O2浓度呈良好的线性关系,可用于H2O2的灵敏性和选择性检测.
  • 摘要：稻草是农业生产的主要副产物,因粗纤维高,利用率不高,基本用于燃料和肥料.以稻草为原料,利用从江西传统发酵食品中分离诱变筛选的高产纤维素酶菌株Neurospora crassa来发酵降解稻草,以制得新型稻草发酵饲料.通过Plackett-Burman(P-B)试验设计从7种培养基成分中筛选出对对纤维降解有显著影响的3个关键因素米糠、硫酸铵和尿素,然后再通过最陡爬坡实验逼近纤维素降解的最大值点,以此作为响应面实验的中心点.最后通过响应面(RSM)试验设计得到粗壮脉纹孢菌发酵降解稻草粗纤维的最佳培养基组成:稻草为89.3％,米糠为8.39％,(NH4)2SO4为1.63％,尿素0.68％.在此最优化培养基组成条件下,粗纤维降解率为49.65％.
  • 摘要：以红薯浆、复原乳为原料,接入乳酸菌发酵后制得红薯酸奶；比较了3种添加不同比例红薯浆的红薯酸奶在4℃贮藏15 d的总酸度、pH、活菌数、持水力(WHC)、酸乳胶体脱水收缩作用敏感性(STS)及感官的变化；结果表明:红薯酸奶在贮藏过程中,总酸度增加比较缓慢,添加量愈大,酸度增长愈平缓；说明添加50～600的红薯浆能在一定程度上抑制酸奶的后酸化；乳酸菌活菌数在15d仍然保持在108 CFU/mL以上；2#(50％红薯浆)红薯酸奶的品质稳定性及感官评价等在3种酸奶中最佳.
  • 摘要：雷电预报因子筛选是构建雷电预报模型的关键,也是提高雷电预报准确度的一个瓶颈问题.本文提出了一种基于粗糙集正域属性约简的雷电预报因子提取方法,该方法采用基数排序方法快速求解决策表的正域,引入可分辨度概念度量属性的重要性,提出了基于可分辨度的核属性与非核属性的提取方法,设计了相应的面向雷电预报因子提取的属性约简算法.真实气象数据集测试结果表明,该方法能有效提取最小集合的雷电预报因子,并较以往方法具有更好的性能.

    南昌大学学报（理科版）的期刊信息

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