大曲中红曲霉的简易分离方法

本文采用无菌过滤收集大曲中红曲霉孢子悬液和基内接种技术,运用稀释平板法,实现了从大曲中简易分离红曲霉,文章介绍了红曲霉的生物学特征,阐述了从大曲中分离红曲霉的原理、分离培养基的设计与制作、大曲中红曲霉分离纯化的技术方法及过程,为获取红曲霉纯菌及红曲生产爱好者提供参考。     

cAMP在红曲霉蓝光诱导途径中的作用

蓝光可以调控红曲霉次生代谢以及孢子生殖,但具体调控机理还未知.为研究腺苷-3',5'-环化一磷酸(cAMP)在蓝光调控红曲霉产孢及桔霉素代谢的作用,在接种红曲霉MX1的YES发酵培养基中添加可诱导红曲霉细胞内cAMP生成的氨茶碱,观察桔霉素产量及红曲霉产孢变化.结果表明,当培养基中氨茶碱浓度为10 mmol/L时,桔霉素产量和分生孢子数分别提高了1.90倍和2.97倍.培养基中氨茶碱浓度为15 mmol/L时,红曲霉子囊孢子数提高了2.84倍,这与蓝光对红曲霉次生代谢及孢子产生调控结果一致.推测蓝光可能是通过cAMP信号途径对红曲霉的产孢及桔霉素进行代谢调控的.     

汾酒大曲中红曲霉的分离和鉴定

对汾酒大曲中的红心曲、后火曲、清茬曲等样品中的红曲霉进行了分离鉴定.从后火曲和红心曲中分别分离到两株红曲霉,编号为N1和N2,经培养特征观察、个体形态特征观察,以及生物学特性分析和生理生化试验等,将两株红曲霉初步鉴定为红曲霉属(Monascus)中的红色红曲霉(Monascus ruber).     

红曲霉界面生长动力学模型的建立

采用界面培养系统,模拟红曲霉固态发酵过程。将红曲霉发酵过程分为快速期,减速期和衰退期,进而建立了界面上红曲霉生长的动力学模型。模型较好地吻合了界面上红曲霉生长的动力学曲线,反映了红曲霉固态发酵过程中微环境下的生长过程。     

红曲霉的有效生理活性物质及应用

红曲霉(Monascus)以其能产生大量天然红曲色素而著称。近年来,由于合成色素的安全性受到挑战,天然色素日益受到重视,特别是具有保健功能的红曲色素更受到消费者的青睐。红曲是以大米为原料,经红曲霉繁殖发酵而成的一种红色米曲。红曲的药用价值虽然在《本草纲目》等早有记载,作为改善血液循环的保健品在我国一直应用到现在,但是长期以来并没有引起人们的重视。1979年日本远藤章从红色红曲霉(M.ruber)中分离出一种命名为MonacolinK的活性物质后,红曲霉的生理活性物质才引起人们的重视。1红曲霉属的分类、培养特征和重要种1.1红曲霉…     

高产γ-氨基丁酸的红曲霉菌株筛选及发酵条件优化

从实验室保藏的11种红曲霉中,筛选出高产γ-氨基丁酸的红曲霉CH-1菌株.研究了发酵温度、时间、接种量、谷氨酸钠添加量等发酵条件对红曲霉CH-1产GABA含量的影响.经单因素实验及正交试验后得出红曲霉CH-1发酵大米产γ-氨基丁酸的较佳发酵条件为：发酵温度30℃,发酵时间9 d,接种量17%,谷氨酸钠添加量0.10 g,在此条件下,红曲霉CH-1发酵大米产GABA为1.93 mg/g,经高效液相色谱检测,桔霉素含量为0.01μg/g,低于国家标准1μg/g,可利用该产品开发更多形式的红曲食品.     

PVA固定化红曲霉发酵生产红曲色素的研究

进行了采用聚乙烯醇固定化红曲霉细胞和游离红曲霉细胞发酵发生红曲色素的比较研究。实验结果表明：采用聚乙烯醇为载体固定化细胞颗粒机械强度高,产色素高,尤其通过添加话性碳解除产物抑制作用后。     

胶体几丁质诱导红曲霉产几丁质酶的研究

本文采用胶体几丁质为底物,研究了红曲霉液态发酵产几丁质酶.研究结果表明:胶体几丁质的添加能有效诱导红曲霉合成几丁质酶.在培养基中添加0.8%(W/V)胶体几丁质的同时,添加0.4%(W/V)葡萄糖,有利于红曲霉的生长以及几丁质酶的合成,发酵48h几丁质酶活力达到最高的0.3504U/mL.     

红曲霉固态发酵产生降脂物质的研究

以激光诱变红曲霉(Monascus)菌株,获突变株T-0013.研究其产洛伐他汀类物质的最佳固体发酵工艺条件,研究结果表明:T-0013菌株用大米作为基本培养基,添加氮源D和微量元素C组合,培养基初始为pH5.0,含水量控制50%,采用28℃培养,洛伐他汀类物质的产量最高.此外根据红曲霉色素产量与洛伐他汀生成量的关系,推测红曲霉产洛伐他汀的生物合成途径,可能是红曲色素生成途径中的一个分支.     

福建红曲中的红曲霉的生理生化特性研究

从福建红曲中分离纯化出6株红曲霉,经菌落形态和生理生化实验,鉴定其为紫色红曲霉(Monascus purpu-reus Went).对6株红曲霉分别进行纯种制曲,跟踪其生物量、糖化酶活力和色价的变化,测定纯曲的酯化酶活力.结果表明:6株红曲霉制曲时,M-4生长最快,92h达到最大生物量,为0.098g(干菌体)·g-1(干曲);M-1糖化力最高,为4217U·g-1(干曲);M-4和M-6产糖化酶的活力分别为4201和4177U·g-1(干曲);M-5产色素能力最高,色价为435U·g-1(干曲).M-4纯曲中的酯化酶活力最大,达170U·g-1(干曲).     

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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