一株野生香菇的鉴定及菌丝最佳生长条件研究

为了对采集的一株野生香菇进行准确鉴定,实验采取了rDNA ITS序列分析以及形态鉴定的方法,研究结果表明该菌株就是香菇.实验对其菌丝的最佳生长条件进行了研究,结果表明其菌丝生长的最适碳源为麦芽糖,最适氮源为牛肉膏,最适碳氮比为30∶1,最适pH为5~6,硫酸镁能够促进菌丝的生长.     

褐口蘑菌丝的培养优化

探讨了不同营养条件对褐口蘑菌丝生长的影响.实验结果表明:褐口蘑菌丝生长的最佳碳源为蔗糖,最佳氮源为蛋白胨;能明显促进菌丝生长的微量元素为硫酸镁,生长调节因子为吲哚乙酸;最适温度为25℃;最佳pH值为7～8.     

激素类物质对大白桩菇菌丝生长的影响

研究了激素类物质三十烷醇、肌醇、赤霉素对大白桩菇菌丝生长的影响.结果表明,三十烷醇对大白桩菇菌丝生长具有更大的促进作用,最适宜的添加质量浓度为1 mg/L.     

一株野生双孢蘑菇生物学特性研究

本实验室分离到一株野生蘑菇,通过形态观察结合ITS方法初步鉴定为双孢蘑菇,命名为G1菌株。主要利用固体平板培养研究了该菌株对碳源和氮源的营养需求、麦粒培养基上的生长情况以及在不同含水量培养料条件下的菌丝生长情况,结果表明:(1)在供试的碳源和氮源中,G1菌株菌丝生长的最适碳源为麦芽糖,最适氮源为蛋白胨和黄豆粉,最适碳氮比为30∶1。(2)G1菌株在麦粒培养基上生长正常,生长速度为(3.980±0.552)mm/d。(3)G1菌株菌丝在含水量为55%~75%培养料上均能生长,最适含水量为65%。     

药用观赏植物——鸟巢蕨叶斑病病原菌鉴定初报

鸟巢蕨(Neottopteris nidus)是一种集药用、食用、美化、净化于一身的蕨类植物,具有巨大的开发价值.采用单斑分离法于染病的鸟巢蕨植株中分离出2株真菌P1和P2,经形态学及分子生物学鉴定,P1为芸苔链格孢(Alternaria brassicae)、P2为交互枝顶孢(Acremonium alternatum).两者对鸟巢蕨均具有致病性,但其生物学特性不同:P1菌丝生长及产孢最适温度均为25℃,产孢最适湿度为35%,最适pH值为6,菌丝致死温度为50℃;而P2菌丝生长及产孢最适温度均为25℃,产孢最适湿度为55%,最适pH值为5,菌丝致死温度为60℃.光照对2种菌的菌丝生长影响不大,但全黑暗有利于两者产孢.P1的最适碳源、氮源、生长因子、无机盐分别为乳糖、酵母膏、吲哚乙酸和MgSO_4,而P2的分别为蔗糖、KNO_3、吲哚丁酸和NaH_2PO_4.     

温度对红菇菌丝生长的影响

探讨不同温度对红菇菌丝生长的影响,筛选出红菇菌丝生长和保存的最适温度.实验设置了两个不同阶段下,不同温度对红菇菌丝的影响,第一阶段时间为两个星期,主要研究红菇菌丝在不同温度下的生长情况,确定菌丝生长和保存的最适温度;第二阶段时间为一个星期,主要研究不同生长状况的红菇菌丝在相同的温度下的生长情况,验证菌丝生长和保存的最适温度.从实验结果可以看出：菌丝生长最适温度为23℃-25℃;菌丝保存最适温度为4℃-10℃;温度过高会使菌丝体内的酶变性失活,温度过低则使菌丝体内酶的活性受到抑制从而影响菌丝的正常生长.此实验为培养红菇菌丝的正常生长提供相关的理论依据.     

毛木耳菌丝体的营养生长条件

研究了不同营养条件对毛木耳菌丝生长的影响.结果表明,毛木耳菌丝生长的最适碳源为葡萄糖;麸皮、豆饼粉作为氮源均适合毛木耳菌丝生长;最适无机盐为磷酸二氢钾,硫酸铜、硫酸锌均抑制菌丝的生长.     

砂仁叶枯病病原菌生物学特性的研究

通过对砂仁叶枯病病原菌(Pestalotiopsis sp.)生物学特性的研究,结果表明适宜的温度能促进菌丝生长和分生孢子萌发.菌丝生长和分生孢子萌发的最适pH值为6;麦芽糖和葡萄糖为菌丝生长的最适碳源;硝酸铵为最适氮源;蔗糖最易促进孢子萌发;通气条件能促进菌丝生长和分生孢子的萌发;连续光照易促进分生孢子产生.无氮源和无碳源条件下菌丝生长不良;相对湿度在95%以下时,分生孢子不萌发.     

一株极端耐盐曲霉的分离、 鉴定及生物学特性分析

从晒盐场盐池周边的风干野生植被表面分离筛选到1株极端耐盐菌株CCHA, 通过形态观察及ITS序列分析对菌株进行鉴定, 并对其生物学特性、 耐盐性及金属耐受性进行分析. 研究结果表明: 菌株CCHA与 21株己报道的曲霉属菌株同源性为55.9%~100%; 其生长温度范围为25~45 ℃, 最适温度为35 ℃; 生长pH值范围为2.5~12.0, 最适pH值为5.0~8.0; 生长盐度范围为0~31%, 最适盐度为5%; 对Cu²⁺有较强的耐受性. 鉴定该菌株为曲霉菌（Aspergillus sp.）.     

芦荟斑点病病原鉴定及其防治药剂筛选

对芦荟斑点病进行病原鉴定,研究温度对病原菌生长和产孢的影响以及不同杀菌剂对病原菌生长的抑制效果.结果表明,芦荟斑点病是因胶孢炭疽菌((Colletotrichum gloeosporioides Penz.)侵染导致,菌丝生长的温度范围为8～38℃,最适生长温度为26～32℃;产生分生孢子的温度范围为12～38℃,最适产孢温度为28～34℃的施保功、甲基托布津对芦荟斑点病病菌丝生长的抑制作用分别为98.7%和97.6%.     

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.     

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.     

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     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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