活性干酵母在葡萄酒酿造中的应用

当前，在我国葡萄酒工业中，除了少部分葡萄酒厂仍采用自然微生物发酵外，大多数企业都采用了人工纯粹培养酵母。酵母纯粹培养技术的应用，大大提高了葡萄酒生产的安全性，改善了产品的质量。然而，纯粹培养技术又比较复杂，工序较多，普遍存在着以下四大问题：一是各葡萄酒厂均要建设一套酵母纯粹培养系统；二是酒母培养需要多层次的扩大培养设备，且设备利用率低，较典型的葡萄酒厂，酒母培养设备只在发酵季节中使用几次；三是生产需要的酒母需经多级扩大培养，手工操作较多，而对小型葡萄酒厂来说，酒母培养的操作人员数量往往与大型葡萄…     

酵母培养物在动物营养中的作用之初步探讨

初步探讨了酵母培养物作为动物微生物制剂的作用机理，影响酵母培养物作用的内外因素。     

利用葡萄糖母液流加发酵提高夫法酵母产量的研究

以葡萄糖母液为基质对夫法酵母进行了间歇，恒速及变速流加发酵实验，建立了简单，数学模模型流加。实验结果表明，以葡萄糖母液为基质培养夫法酵母生产胡萝卜素是可行的。同时，变速流加可显著提高夫法酵母的产量。当流加控制因子Ｋ＝８．７＊１０＾－４时，变速流加发酵比间歇发酵夫法酵母产量提高了５８．４％。     

红酵母RY-2001产类胡萝卜素的研究

研究碳源、氮源和通气量对红酵母(Rhodotorula sp．)RY-2001产类胡萝卜素的影响，并通过正交试验优化其产类胡萝卜素的培养基组成。结果表明，RY-2001产类胡萝卜素的适宜培养基：蛋白胨4％、葡萄糖2％、MgSO40．1％、酵母膏1％。摇瓶装量为50ml／250ml，28℃培养48h，在上述条件下，红酵母中类胡萝卜素含量为81．465ug/g。     

SCP生产菌海洋红酵母摇瓶培养研究

研究了海洋红酵母的培养条件。结果表明：海洋红酵母生长和色素产生不需要光照。适宜其生长的条件为：温度25℃～28℃，pH4.0～5.0，糖浓度35g/L，氯化钠浓度20～30g/L，接种量为7.5%～10%，这为反应器培养打下了基础。     

高铁营养酵母菌种筛选

在酵母菌中筛选铁的本底水平及生物量较好的优良菌株,以甜菜糖蜜为主要原料,加入适当的无机铁及营养盐,经发酵培养获得高铁营养酵母产品,酵母细胞铁的含量为2352mg/kg,蛋白质的含量为53 38%(w/w),干酵母产率为2 70%(w/v)。     

味精废水中粘红酵母和螺旋藻混合培养生产油脂

研究了在味精废水中混合培养粘红酵母和钝顶螺旋藻，并生产油脂。将COD（化学需氧量）为32000mg/L的味精废水稀释5倍，pH值调节到5.5，接种10%粘红酵母，培养3d后接种10%螺旋藻。培养5d后，COD降解率为70.3%，油脂产量为216mg/L，分别是粘红酵母单独培养的1.75倍和5.42倍，螺旋藻单独培养的2.36倍和7.64倍。混合培养也利于废水中NH₄⁺-N、还原糖以及谷氨酸的去除。     

酵母培养物在动物营养方面的研究进展及应用

阐述了酵母培养物的营养成分、作用机理及其对动物产奶、增重等生产性能应用的研究.酵母培养物作为1种新型的"绿色"活性饲料添加剂,在动物营养方面的应用具有广阔的前景.     

麦角固醇高产率酵母菌株的筛选及其培养条件的研究

从实验室保存的２０株酵母菌中筛选出麦角固醇含量较高的优良菌株奇异酵母２００５。以糖蜜为主要原料，采用正交试验方法考查了培养条件对奇异酵母２００５麦角固醇产量的影响。磷酸盐浓度的影响极显著（ａ＝０．０１），以不添加磷酸盐为最好。氦源种类也有显著影响（ａ＝０．０５），０．２４％氯化镀为氮源时产量最高。在优化条件下，麦角固醇产率可达到３．４２％（对细胞干重）。     

玉米皮水解液发酵生产饲料酵母的研究

本文研究了玉米皮水解液发酵生产饲料酵母的摇瓶间歇培养和分批补料培养条件 ,进行了10L反应器分批补料培养试验。研究结果表明 :间歇培养的适宜底物浓度为2 %糖浓度和7 %麸皮水 ,摇瓶间歇培养和分批补料培养的酵母浓度分别达到10.9g/L和21.6g/L ,10L反应器分批补料培养的酵母细胞浓度达20.7g/L。     

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.     

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