冷季补饲对幼年牦牛瘤胃发酵和血液指标的影响

通过对试验组进行放牧加补饲的方法研究了冬季补饲对幼年牦牛瘤胃发酵及血液指标的影响。结果表明,试验组和对照组牦牛日增重相差820.83 g,差异极显著（P〈0.01）;瘤胃发酵指标中pH差异不显著（P〉0.05）,试验组氨氮（NH3-N）浓度显著高于对照组（P〈0.01）,而瘤胃液蛋白含量却显著低于对照组（P〈0.01）;血液指标中TP、Glu及PUN的测定结果试验组均高于对照组,但差异不显著（P〉0.05）。     

用高效液相色谱法比较牦牛和犏牛乳中两种乳清蛋白含量

为比较牦牛和犏牛乳中两种乳清蛋白的含量,采用C18柱建立了检测牦牛乳和犏牛乳中α-乳清蛋白(α-La)和β-乳球蛋白(β-Lg)含量的高效液相色谱法(HPLC).试验动物包括放牧全奶麦洼牦牛(n=40)、半奶麦洼牦牛(n=27)和犏牛(n=36),分别从其全乳中制备乳清后,用HPLC方法测定两种乳清蛋白含量.结果表明,全奶牦牛、半奶牦牛和犏牛乳中α-La平均含量接近,约为0.86 mg/mL;β-Lg含量分别约为7.10 mg/mL、9.64 mg/mL和6.96 mg/mL,在半奶牦牛乳中含量极显著高于全奶牦牛乳和犏牛乳(P<0.01),而在全奶牦牛乳和犏牛乳中的含量接近.β-Lg的色谱图为单峰或双峰,未见明确规律.进一步用聚丙烯酰胺凝胶电泳法(PAGE)对牦牛乳和犏牛乳中β-Lg进行基因分型,表明牦牛中均为EE型,犏牛中为AE和BE型,BE型频率为0.694 4.HPLC可以分析牦牛和犏牛乳中α-La和β-Lg含量,但无法对β-Lg进行基因分型.     

播期和播量对豫南直播稻产量形成特征的影响

为探究播期和播量对豫南直播稻产量和干物质累积的影响，以水稻品种丰优香占为试验材料，设置5个播期处理，即A₁(4月25日)、A₂(5月5日)、A₃(5月15日)、A₄(5月25日)和A₅(6月4日),5个播量处理，即B₁(18.0 kg/hm²)、B₂(22.5 kg/hm²)、B₃(27.0 kg/hm²)、B₄(31.5 kg/hm²)和B₅(36.0 kg/hm²)。结果表明：播期和播量对产量的影响均达到极显著水平；二者交互对产量、有效穗数、穗粒数、千粒重的影响均达到极显著水平。随着播期的推迟，直播稻产量先增加后减少。在A₁、A₂、A₃、A₄和A₅播...     

放牧条件下牦牛泌乳若干生理特性的研究

对青草季节放牧条件下78头四川麦洼牦牛泌乳生理特性作了研究.麦洼牦牛需有犊牛的吮乳刺激才能引起排乳反射,一般为两期,全奶牦牛潜伏期分别为48.8±14.1和56.1±15.1秒,差异极显著(P<0.01).Ⅱ期乳脂率和乳脂小球数极显著高于Ⅰ期.全奶牦牛的日挤乳量为1324±473ml,Ⅰ期占73.8%.泌乳一年以上的半奶牦牛有些Ⅰ期即可将乳排尽,排乳反射的潜伏期明显短于全奶牦牛,日挤乳量为576±37lml,Ⅰ期占83.7%.半奶牦牛的乳蛋白和乳脂含量均高于全奶牦牛(P<0.01).     

维生素B12的毛细管电泳——化学发光检测研究（英文）

基于维生素B₁₂(VB₁₂)对鲁米诺-双氧水体系良好的化学发光（CL）催化活性,研究确立了一种新型毛细管电泳—化学发光（CE-CL）检测方法,用于这一重要营养物质的准确CL分析.预处理阶段,连二亚硫酸钠（Na₂S₂O₄）被确定为将VB₁₂（Co（III））转化成VB₁₂（Co（II））的适当还原剂,以使VB₁₂在luminol-H₂O₂发光体系中获得良好的催化信号.这一过程产生的CL干扰组分,则通过毛细管电泳（CE）加以分离除去.实验中,VB₁₂可被温和还原并由催化所得CL信号精确测定.采用实验室自行组建的CE-CL检测装置,该测试过程可在20 min内完成;检测下限（LOD）2×10^-7mol/L（S/N=3）,线性范围6×10^-7～6×10^-4 mol/L（r²=0.968）,相对标准偏差（RSD）2.4%（n=9）.对药品中VB₁₂含量进行加标回收实验,回收率97%～106%.相较于已有关于VB₁₂的CL分析研究,本文首次考察了预还原处理中产生的干扰组分及其分离过程,以便捷操作获得更为可靠的检测数据.     

B10和NaB10团簇的几何结构和电子性质

应用密度泛函理论（DFT）中的B3LYP方法在6-311+G（d）水平上计算并分析了B₁₀和NaB₉10)团簇的几何结构及电子性质,同时,讨论了团簇的平均结合能、能级间隙、自然电荷分布和极化率.研究表明:B₁₀团簇的基态为半平面构型,NaB₁₀团簇的基态是以B₁₀半平面为配位基,并与Na原子构成的配位络合物.能级间隙和平均结合能结果表明增加一个Na原子改变了B原子之间的成键作用.另外,对平均线性极化率和极化率的各向异性不变量研究表明:基态B₁₀团簇增加一个Na原子后NaB₁₀团簇的电子结构更趋于紧凑.     

艾比湖湿地季节性冻融土壤温室气体排放规律研究

利用静态箱–气象色谱法对2015年11月—2016年3月艾比湖湿地季节性冻融期土壤温室气体进行观测. 结果表明:季节性冻融期裸地土壤CO₂表现为汇、芦苇和柽柳土壤CO₂表现为源;芦苇、柽柳和裸地土壤CH₄表现为汇,而N₂O表现为源;芦苇、柽柳和裸地土壤温室气体最低值均出现在冻结期（11月—次年2月）且为负通量;不同植被类型下土壤CO₂在融化期（3月末）出现排放峰值,而土壤CH₄和N₂O在冻融交替期(3月初)出现排放峰值;在整个观测期,芦苇和柽柳土壤CO₂、CH₄和N₂O排放峰值高于裸地;温度对季节性冻融期土壤CO₂和N₂O影响显著,均达到显著正相关（P<0.05）,土壤温度能解释芦苇、柽柳和裸地土壤CO₂通量的77%～88%; 土壤质量含水量对土壤CH₄和N₂O影响均达到显著正相关关系（P<0.05）,土壤质量含水量能解释芦苇、柽柳和裸地CH₄和N₂O通量的25%～46%和41%～69%. 表明在干旱区季节性冻融期,温度变化对不同植被类型下土壤CO₂影响较大,而在冻融交替期水分变化对CH₄和N₂O通量影响显著. 芦苇、柽柳和裸地土壤呼吸Q₁₀值分别为2.37,2.58和2.33,不同植被类型基于100 a尺度,土壤温室气体全球增温潜势由大到小依次为芦苇（569.67 kg·hm–2）、柽柳（152.09 kg·hm–2）、裸地（–861.50 kg·hm–2）.      

牦牛乳中Ca,K,Mg,P的含量

用原子吸收法分析了天然草地放牧的牦牛和犏牛乳中Ｃａ、Ｍｇ、Ｋ的含量，用比色法测定Ｐ的含量．结果显示，处于泌乳中期牦牛乳中Ｃａ、Ｋ、Ｍｇ和Ｐ的含量（ｍｍｏｌ／Ｌ）分别为３６．７９±８．４７、２７．６１±３．３９、２．５２±０．５０、２４．７８±６．７２．实验还对干乳期牦牛乳腺分泌物中上述几种的含量及Ｃａ、Ｐ在牦牛乳中的分布进行了初步研究     

人与自然和谐共生现代化评价指标体系构建研究——以福建省南平市为例

以福建省南平市为研究区，采用频度分析和专家咨询法构建了生态保护(B₁)、产业发展(B₂)、乡村振兴(B₃)、文化建设(B₄)、碳汇交易(B₅)、机制保障(B₆)6个一级和30个二级指标体系，利用层次分析法结合TOPSIS法进行人与自然和谐共生现代化发展评价.结果表明，南平市人与自然和谐共生现代化发展综合分值77,处于提高发展T₂阶段，现代化发展排序为乡村振兴(B₃)>生态保护(B₁)>产业发展(B₂)>机制保障(B₆)>碳汇交易(B₅)>文化建设(B₄).各部分的发展不均衡，建议南平市从优化森林管护机制、发展适度规模经营、弘扬优秀生态文化等方面解决发展与保护的问题.     

B2O3对无氟CaO-Al2O3-BaO基保护渣性能的影响

借助高温物性测试仪、黏度仪、原位热分析仪及傅里叶变换红外光谱仪等,研究了B₂O₃含量对无氟CaO-Al₂O₃-BaO基保护渣熔化温度、黏度和结晶性能的影响。结果表明,当B₂O₃含量为7%时,无氟CaO-Al₂O₃-BaO基保护渣熔化温度、黏度和结晶性能最佳。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that