完全图和星的合成的点可区别正常边染色(英文)

首先,给出了完全图K_p和星S_q的合成的点可区别正常边色数的一个上界:当p≥2,q≥4时,上界是pq+1.再利用正多边形的对称性以及组合分析的方法来构造染色,分别得到了当p=2,q≥4;p≥3,q=4;p是偶数且p≥4,q=5;pq是奇数且p≥3,q≥5时,完全图K_p和星S_q的合成的点可区别正常边色数.     

莫扎特艺术歌曲的创作及演唱风格

莫扎特作为18世纪欧洲古典音乐的大师,一生创作了三十六首艺术歌曲,他把德奥艺术歌曲与浪漫主义色彩完美结合,赋予了超凡脱俗的感染力和生命力,开创了德奥艺术歌曲创作的先河。本文从莫扎特艺术歌曲的创作及演唱风格两方面来进行探讨,以期对准确把握和演绎其艺术歌曲作品有所助益。     

乌鸡蛋品质的电喷雾萃取电离质谱法研究

将自行研制的中性解吸电喷雾萃取电离源(ND-EESI)与LTQ-XL质谱仪耦合,结合主成分分析(Principal components analysis,PCA)方法,在无需样品预处理的条件下,通过直接分析不同饲料配比饲喂的乌鸡蛋蛋清和蛋黄样品,考查了不同饲料饲喂对鸡蛋品质的影响.结果表明,ND-EESI-MS技术结合PCA方法可以将不同饲料饲喂的鸡蛋黄样品区分开来,不同饲料配比饲喂对鸡蛋清的影响小于对鸡蛋黄的影响.ND-EESI-MS技术结合PCA方法可以从分子水平观察饲料添加对鸡蛋品质的微小影响,是一种强大的分析工具.     

Prediction of protein homo-oligomer types by using IB1 algorithm

Protein homo-oligomers play an important role in various vital activities. Successful prediction of protein homo-oligomers directly from primary sequence is very beneficial to understand their protein function. In this paper, a total of 14 238 homo-oligomeric protein sequences are predicted by IB1 algorithm. 10-fold cross-validation test is applied to test the predictive capability of the proposed method. The predictive results show that overall prediction accuracy is 90.46%, which is at least 9% higher than that of previous results; furthermore,the sensitivity and Matthew’s correlation coefficient for each class of homo-oligomers are also improved significantly. The results show that IB1 algorithm is effective and feasible,and very suitable for predicting protein homo-oligomer types.     

加热方式对鸡肉制品不同部位脂质氧化的影响

为探讨鸡肉制品在不同加热方式及冷藏期间的氧化情况,选取黄羽肉鸡的胸肉、腿肉、皮下脂肪为原料,对比3个部位脂肪含量和脂质组成；整鸡分别进行微波、烤制、煮制、蒸制处理,检测其初级代谢产物过氧化值与次级代谢产物丙二醛含量。结果表明:中性脂肪含量在皮下脂肪中含量较高,与腿部、胸部存在明显差异,与磷脂分布规律相反；腿部中的多不饱和脂肪酸与必需脂肪酸含量显著高于其他部位；加工与冷藏显著增加各部位丙二醛的含量。储藏4d,各部位过氧化值先上升后下降,煮制后的胸部、腿部与皮下脂肪氧化速度最快,腿部在烤制后丙二醛增长速度最慢,各加热方式间存在明显差异(P<0.01)。     

具有极点型奇点的二阶线性方程与广义解

给出二阶线性方程二阶极点邻域的级数形式解.传统观念认为适合方程的收敛级数才是方程的解.在这种观念的支配下,一些简单情形求得的发散级数形式上使方程成为恒等式,被称为解的渐近展开.发散级数适合方程并非个别现象.这个事实促使我们改变观念,承认使方程成为恒等式的发散级数是方程的(广义).     

Characteristics of ultrafine particle from a compression-ignition engine fueled with low sulfur diesel

Number size distributions （NSDs, 10--487 nm） and composition of nanoparticle emitted from an engine fueled with ordinary diesel （OD） and low sulfur diesel （LSD） fuel were comparatively studied. The results indicate that, compared with the OD, the LSD was found to slightly decrease the mass concentration, and significantly reduce the number concentration of the total particles （10--487 nm）, and the reduction of number increased with the speed and load of engine. The NSD for the two fuels showed a similar bimodal structure under all test engine conditions. Under the same engine conditions, the nucleation mode for LSD fuel was significantly lower than that of ordinary diesel. However, the accumulation mode for the two fuels showed little difference. The elements composition of exhaust particles included C, O, Cl, S, Si, Ca, Na, AI and K. The S element was not detected in LSD fuel case. The main component of soluble organic fraction （SOF） of exhaust particles for the two fuels included saturated alkane （C15-C26）, ester and polycyclic aromatic hydrocarbons （PAHs）. However, PAHs were not found in LSD fuel case.     

天然植物脓疮草中的成分初探

用原子吸收分光光度法测定了脓疮草中的微量元素铁、锌、铜、锰的含量；用硅胶Ｇ薄层层析分离了脓疮草中的生物碱、用聚酰胺薄膜层析分离了脓疮草中的黄酮类有效成分。     

大学生人体成分的现状分析与对策

采用实验法,分析温州大学、温州医学院等高校学生人体成分的现状.结果显示,大四学生与大一、大二、大三学生之间体脂块(BMI)有显著差异,男女生体脂块(BMI)无显著性差异;学生腹部脂肪质量分数超质量型比例女生明显高于男生,大四学生明显高于大一、大二、大三学生;男女生上肢力量明显不足,女生左、右上、下肢肌肉质量分数正常型比例明显低于男生;大学生体内水分缺少比例最高,蛋白质缺少比例排第二.因而应制定合理的运动处方与营养处方,改善大学生人体成分现状,提高大学生的健康水平.