温度对蓖麻蚕卵期历期影响与低温保卵试验

本文报导蓖麻蚕卵期历期与温度关系及低温保种试验。试验结果表明最低和最高孵化温度分别为16℃及32℃。孵化适温范围是17—30℃,在这个温度范围内,其孵化率为87％——99％。蚕卵在15℃及33℃仍可发育至幼虫,并且有极少数能咬穿卵壳,但不能脱壳而出。以15℃及18℃作为低温保种试验的温度,其结果:(1)如将初产卵放在18℃中,处理时间长短不同,则蚕卵历期分别为19天、20及21天,孵化率分别为100％,95.5％,73％,73.3％及70％.可将卵期延长10——12天(以蚕卵在25℃中经9天孵化作为对照)。(2)如将初产蚕卵放在15℃中,处理时间长短不同,则蚕卵历期分别为19、21及30天,孵化率分别为87％,73.3％,56.4％及45.5％,可将卵期延长10、12及22天。不管在低温处理时间多长多短,如果能够孵化出来的幼虫,其成活率都很好,茧的质量也好。     

不同状态的牛供核细胞对核移植胚胎发育的影响

比较了不同状态的牛供核细胞对核移植胚胎发育的影响．结果表明：体外培养2-5,6—10,11—15,16v20代的供核细胞的融合率和卵裂率没有差异,但随着体外培养代数的增加,重构卵发育到囊胚的比例下降．16—20代供核细胞组的囊胚率显著低于2—5和6—10代供核细胞组的囊胚率（分别为19．61％,26．67％和28．57％,P〈0．05）;来源于原代牛（G0）,克隆一代牛（G1）和克隆二代牛（G2）的供核细胞的融合率,卵裂率和囊胚率没有明显差异;对于新鲜供核细胞和冷冻供核细胞,胞质内注射法的重构卵率要明显高于透明带下注射法的重构卵率（分别为81．31％,67．96％和82．08％,52．94％,P〈0．05）,但各组重构卵的卵裂率和囊胚率没有差异,冷冻供核细胞结合胞质内注射法可以获得较好的核移植胚胎发育．     

玻碳电极吸附循环伏安法测定植酸含量

本文阐述一个测定植酸含量的方法。测定结果与光度法相符。测定植酸中总磷和无机磷的变异系数(n=5)分别为0.66％和0.75％;回收率分别为99.7％—100.2％和99.3％—100.8％。在选定的最佳条件下,磷浓度在0.5～50ug/ml范围内与第一氧化峰电流值呈线性,检测线低于0.5ug/ml磷。     

3,5-二氨基-4'-甲基-二苯基醚的合成

以3,5-二硝基溴苯与对甲基苯酚为原料,合成出中间产物3,5-二硝基-4＇-甲基-二苯基醚,再用钯／碳还原得到3,5-二氨基-4＇-甲基-二苯基醚,两步反应的产率分别为81．86％和89．16％．用元素分析、IR和^1H—NMR确证了其结构．     

紫球藻胞外多糖抗柯萨奇B3病毒活性

采用离子交换凝胶Q Sepharose Fast Flow,以NaCl梯度洗脱,将紫球藻胞外多糖(ESPS)分离成3个组分ESPS0、ESPS1.0和ESPS1.6,分别占粗多糖总量的44．2％(以质量计,下同),20．3％和16．4％．ESPS0中未测出蛋白,ESPS1.0和ESPS1.6的蛋白含量分别为7．8％和7．6％;ESPS0、ESPS1.0和ESPS1.6的硫酸基含量分别为16．3％,11．6％和8．3％．利用体外模型测试了3个组分的抗CVB3病毒的活性．发现ESPS0,ESPS1.0和ESPS1.6抑制CVB3病毒的半数抑制质量浓度分别为2．03,0．51和0．53mg／L,治疗指数IT值分别为61．6,245．1和235．8;在相同条件下,阳性对照药物病毒唑的半数抑制质量浓度和IT值分别为31．25mg／L和16．0．结果表明,3种组分抗CVB3活性均高于病毒唑。     

毛细管气相色谱分析风油精

本文介绍用OV—101熔融石英毛细管柱分离风油精,以萘为内标,定量测定了漳州水仙牌风油精和德国鹰牌风油精中薄荷脑,水杨酸甲酯和樟脑的含量,回收率分别为99.29％,99.26％和98.17％,回收率的变异系数分别为0.80％,0.62％,和0.91％。     

抗病丰产优质番茄新品种——中蔬5号和中蔬6号

本发明选育出的含TM_1基因的792—16—16和791—4,含有TM_(2a)基因的792—10品系等作亲本杂交,经多代鉴定和选择,育成“中蔬5号”和“中蔬6号”番茄新品种。“中蔬5号”高抗TMV0、1、2、1.2株系,耐CMV,中试较对照品种增产18.2％,大面积种植增产26％,粉色果,单果重155克,畸形果率0.27％,裂果率0.     

体液直接进样高效液相色谱法测定尿中肌酐和尿酸

报道了聚氧化乙烯交联３－氨基丙基混合功能基固定相在体液直接进样ＨＰＬＣ分析中的应用测定了人尿中的肌酐和尿酸流动相为００１ｍｏｌ／Ｌ磷酸盐缓冲液／１０％甲醇,ｐＨ４８１检测波长２３５ｎｍ测定尿酸和肌酐的线性范围分别为３ｎｇ／ｍＬ—１０μｇ／ｍＬ和２ｎｇ／ｍＬ—１０μｇ／ｍＬ,精密度分别为２０％和３０％,回收率分别为９６３％和１０２０％     

大熊猫血相的初步检测

以大熊猫血清作为材料,进行醋酸纤堆薄膜电泳、聚丙稀酰胺凝胶电泳,血清乳酸脱氧酶及同工酶、谷丙转氨酶的分析,探索在动物园人工饲养的特定条件下,健康大熊猫与病态大熊猫血清中的各种蛋白质、谷丙转氨酶、乳酸脱氢酶及同工酶的含量,为人工饲养大熊猫时疾病的防治提供生化依据。实验结果表明:(一)血清蛋白质共分成白蛋白、α_1—球蛋白、α—球蛋白、β—球蛋白、γ—球蛋白五个区带,其含量是:健康大熊猫分别为53.50—54.4％、5.31—6.64％、8.31—8.73％、11.52—12.72％、19.13—19.74％,而病态大熊猫则分别为48.43％、10.10％、12.63％、12.51％、16.31％。(二)聚丙烯酰胺凝胶电泳分成六个明显的区带,其含量是:健康大熊猫分别为29.22％、4.23％,16.07％、10.30％,10.12％、30.08％。病态的分别为27.77％、3.99％、14.07％、10.88％、10.40％、32.89％。(三)乳酸脱氢酶的活力单位是:健康大熊猫为71.68—86.41,病态的为128.76。(四)乳酸脱氢酶同工酶分为五个酶活力区带,其百分比含量是:健康大熊猫是LDH_2>LDH_1>LDH_2>LDH_5>LDH_4,而病态的是LDH_1>LDH_2>LHD_3>LDH_5>LDH_4。(五)谷丙转氨酶的活力单位是:健康的大熊猫为2.4—4.8,而病态的则为18.4。     

联合治疗120例慢性乙型肝炎的近期疗效观察

本文将120例慢性乙型肝炎随机分为两组,分别用抗乙肝免疫核糖核酸合并胸腺肽、猪苓多糖合并乙肝疫苗进行治疗,疗程均为三个月。二组药物均有较好的降ALT和SB的作用。同时均有一定的抗病毒抑制HBV复制的作用。抗乙肝免疫核糖核酸、猪苓多糖二组对HBV—DNA阴转率分别为48.6％、25％,对HBeAg的阴转率分别为46.2％、26.7％,对抗HBc—IgM转阴分别为50％、26.7％,说明二组药物均不能达到理想的抗病毒效果。     

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