演示实验在大学物理教学中的积极作用

本文结合教学工作实际指出演示实验在大学物理教学中的积极作用，并强调在“大学物理讨论课”中引入尝示实验的必要性。     

《孟子师说》还原《孟子》太和气象

<孟子师说>还原<孟子>太和气象,主要由三方面展开:以"知痛痒心"解说孟子"性善论",以"即事即义"发挥孟子"养气说",以"本之心术"阐扬孟子"尊王斥霸"思想.<孟子师说>从人之本心出发,还原了孟子的个人修养理论和社会政治学说的本来面目.     

Rapid screening for ethyl carbamate in stone-fruit spirits using FTIR spectroscopy and chemometrics

Ethyl carbamate (EC, urethane, C₂H₅OCONH₂) is a known genotoxic carcinogen of widespread occurrence in fermented food and beverages with the highest concentrations being found in stone-fruit spirits. Time-consuming procedures requiring extraction and gas chromatographic–mass spectrometric determination are regarded as reference procedures for the analysis of EC in alcoholic beverages. In this study, the rapid method of Fourier transform infrared (FTIR) spectroscopy in combination with partial least-squares (PLS) regression using selected wavelength bands is applied for the first time to the screening analysis of EC in stone fruit spirits (analysis time only 2 min). Apart from the actual content of EC in the sample, additional information was available from the FTIR spectra. This included data concerning the EC precursor hydrocyanic acid (HCN) and the maximum EC concentration which could be formed during storage. The PLS procedure was validated using an independent set of samples (Q² = 0.71–0.76, SEP = 0.42–0.67). The method was found to lack the accuracy required for a quantitative determination; it could only be used semi-quantitatively in the context of a screening analysis. If a rejection level of 0.8 mg L^–1 is applied as cut-off, overall correct classification rates of 85–91% for the calibration set and 77–85% for the validation set were achieved. False negative results can be avoided by lowering the cut-off to 0.6 mg L^–1. Through use of FTIR screening, 60–70% of all samples can be classified as negative and removed, leaving only conspicuous analysis results exceeding cut-off to be confirmed by complex and labour-intensive reference analyses.     

白酒生产中固液复合发酵模式研究

通过对固态发酵和液态发酵生产白酒在工艺、酒质、出酒率各方面的研究,得到了一种固液结合的复合发酵模式。试验表明，酒质基本不变下，复合工艺出酒率较传统工艺平均提高了3.0%。     

资本主义起源的动力与道德制约机制

文章认为，资本主义起源有着双重的动力与道德制约机制。世俗化的消费欲望与宗教的禁欲主义同时发挥作用，而市场的运作也使其能够向着合理化的道路前进。因此，现代意义上的发展需要一个合适的硬件与软件相互配合的环境。     

隐逸精神乌托邦:桃花源——重读《桃花源记》并诗

陶渊明的《桃花源记》并诗是中国文人的集体隐逸精神乌托邦,引发无数文人墨客遐思。从虚构与想象理论诠释《桃花源记》并诗引起的想象混乱,阐明其政治影射和隐逸精神乌托邦建构的用意,对全新理解《桃花源记》并诗有着重要意义。     

试论史铁生作品中的宗教意识

史铁生的作品在苦难与救赎、宿命与超越、目的与过程等层面都表现了一定的宗教意识，产生这种意识的根源是其特殊的人生经历和在人文精神导引下的独特人生体悟。     

连续投影算法在近红外光谱校正模型优化中的应用

主要从减少变量、提高校正速度的角度,采用了一种新的变量提取方法——连续投影算法(successive projections algorithm)来优化白酒酒精度的近红外光谱定量模型,对于异常样品的剔除沿用了T2椭圆法,使模型更具代表性和稳健性,只用了全部变量的1.17%(9个变量)建立模型,其预测相关系数0.9477,得到了较好的预测效果,并与采用经无信息变量消除法进行波长优选后的偏最小二乘(partial least-squares)方法建立的校正模型做了比较,进一步证明这种算法是切实可行的。     

Multi-walled carbon nanotubes as the gas chromatographic stationary phase: role of their functionalization in the analysis of aliphatic alcohols and esters

Presented hereafter is the novel application of differently functionalized multi-walled carbon nanotubes (f-MWCNTs) as stationary phases for the GC separation of C(1)-C(5) alcohols and esters. Low-cost packed columns, easily prepared in laboratory, were used with satisfactory results. Depending on the functional groups introduced on the pristine MWCNTs, remarkably different behaviours have been observed, thus indicating that derivatization is a key factor to achieve optimal resolution. The best performance was shown by the 2,2'-(ethylenedioxy)diethylamine derivatized MWCNTs, allowing the separation of alcohol isomers, for this reason chosen for the investigation of fermentation by-products in distilled spirits. The degree of derivatization has been assessed for each packing material by thermogravimetric analysis (TGA). A computational study has been performed to correlate the physico-chemical properties of alcohol probes with the retention behaviour.     

梭状芽孢杆菌L—Ⅱ对有机酸和醇类代谢的研究

本文对梭状芽孢杆菌L一Ⅱ代谢利用有机酸和醇类进行了研究。研究结果表明,梭状芽孢杆L一Ⅱ能很好地利用乙酸、丙酸、丁酸以及乙醇和丙醇。当以乙醇和乙酸为底物时,其主要产物为了酸和己酸;当以乙醇和丙酸为底物时,其主要产物为戊酸、庚酸;当以丙醇和乙酸为底物时,其主要产物为丙酸、戊酸、丁酸以及己酸。