日常饮食中的微量元素研究

对常用的大米、蔬菜、鱼和肉用原子发射光谱进行了微量元素含量的测定，同时说明了合理饮食的重要性。     

Perfect Matchings in Bipartite Lattice Animals: Lower Bounds and Realizability

In the first part of this paper we establish sharp lower bounds on the number of perfect matchings in benzenoid graphs and polyominoes. The results are then used to determine which integers can appear as the number of perfect matchings of infinitely many benzenoids and/or polyominoes. Finally, we consider the problem of concealed non-Kekuléan polyominoes. It is shown that the smallest such polyomino has 15 squares, and that such polyominoes on n squares exist for all n ≥ 15.     

Utilization of agro-resources by radiation treatment -production of animal feed and mushroom from oil palm wastes

The production of animal feeds and mushrooms from oil palm cellulosic wasres by radiation and fermentation has been investigated in order to utilize the agro-resources and to reduce the smoke pollution. The process is as follows: decontamination of microorganisms in fermentation media of empty fruit bunch of oil palm (EFB) by irradiation, inoculation of useful fungi, and subsequently production of proteins and edible mushrooms. The dose of 25 kGy was required for the sterilization of contaminating bacteria whereas the dose of 10 kGy was enough to eliminate the fungi. Among many kinds of fungi tested, C. cinereus and P. sajor-caju were selected as the most suitable microorganism for the fermentation of EFB. The protein content of the product increased to 13 % and the crude fiber content decreased to 20% after 30 days of incubation with C. cinereus at 30°C in solid state fermentation. P. sajor-caju was suitable for the mushroom production on EFB with rice bran.     

反相高效液相色谱法同时测定动物血浆中泰乐松注射液的多种组分

研究了用反相高效液相色谱法分析动物血中泰乐松注射液中三种组分氯霉素、醋酸氢化泼尼松和酒石酸泰乐菌素浓度的方法，，血药由甲醇－氯仿混合液提取，采用ＯＤＳ柱，以甲醇－腈－醋酸钠溶液为流动相，可变波长检测。     

均衡膳食可使幼儿锌、铜、铁营养平衡研究

目的通过幼儿进食均衡膳食可使锌、铜、铁营养平衡,目的使幼儿健康成长。方法常规体检、原子吸收法血检3 000多幼儿,其中随机抽查300名幼儿作调查,进行均衡膳食前后的自身对比。结果幼儿进食均衡膳食后,每人每日锌、铜、铁摄入量达标,则血中锌、铜、铁含量达标;而进食均衡膳食前每人每日锌、铜、铁摄入量不达标,导致血中锌、铜、铁含量也不达标,则会影响幼儿生长发育和健康成长。结论建议在幼儿及学生中推广均衡膳食和开展营养工程,以保证其健康成长。     

Proteotypic peptides of hairs for the identification of common European domestic and wild animal species revealed by in-sample protein digestion and mass spectrometry analysis

The aim of this work is to offer an alternative or complementary analytical tool to the time-consuming and expensive methods commonly used for the recognition of animal species according to their hair. The paper introduces a simple and fast way for species differentiation of animal hairs called in-sample digestion. A total of 10 European animal species, including cat, cow, common degu, dog, fallow deer, goat, horse, sika deer, rabbit, roe deer, and 17 different breeds of dogs were examined using specific tryptic cleavage directly in hair followed by matrix-assisted laser desorption/ionization–time of flight mass spectrometry and liquid chromatography-electrospray ionization quadrupole time of flight. Principal component analysis was used for the subsequent mass spectrometric data evaluation. This novel approach demonstrates the ability to distinguish among individual animal species, which is supported by finding characteristic m/z values obtained by the mass spectrometry for each animal species. The approach was successfully tested on two “blind” samples. On the other hand, the attempt to distinguish among hairs of different dog breeds has not been successful due to the very similar protein composition and their amino acid sequences.     

动物源性食品中五种氟喹诺酮类药物残留量的同时测定

建立了一种测定动物源性食品中5种氟喹诺酮类药物残留量的高效液相色谱法。样品经酸性乙腈提取,正己烷液-液分配净化,0.01 mol/L四丁基溴化铵溶液溶解残渣,过微孔滤膜,采用高效液相色谱附荧光检测器检测,外标法定量。氧氟沙星、环丙沙星、恩诺沙星线性范围为0.002~0.200μg/mL;诺氟沙星、达氟杀星线性范围为0.001~0.100μg/mL,5种氟喹诺酮类药物的相关系数为0.99901~0.99917。在0.002~0.040 mg/kg范围内,样品加标平均回收率在79.6%~97.5%之间,相对标准偏差为2.8%~15.3%。方法的检出限氧氟沙星、环丙沙星、恩诺沙星为0.004 mg/kg,诺氟沙星、达氟沙星为0.002 mg/kg。     

动物油在不同催化剂上的转化

在固定床微反装置内,对动物油在USY,HZSM-5,ANA,Al2O3和SiO2催化剂上的反应行为进行了研究.结果表明,脂肪酸酯分子一般先发生脱羧和脱羰反应(主要是C-O键的断裂),初始裂化反应产生的大分子烃类及其含氧衍生物会在催化剂的酸性位上发生二次裂化和脱氧等反应.USY和HZSM-5分子筛的酸性强,有利于二次裂化,生成较多的液化气和汽油;在具有弱酸位、大孔的Al2O3催化剂上,发生温和的二次裂化反应,转化率略低;而在非酸性的大孔SiO2催化剂及无孔的ANA分子筛上,二次裂化反应被显著抑制,转化率更低,产物中存在大量的含氧衍生物.热裂化反应会产生较多的CO2,而催化裂化反应会产生相对较多的CO.     

动物组织中8种同化性激素及代谢物残留量的检测方法研究

采用液相色谱-串联质谱（LC-MS/MS）测定了动物组织中的去甲雄三烯醇酮（TRE）、甲基睾丸酮（MTS）、丙酸睾酮（PTS）、苯丙酸诺龙（PNT）、醋酸甲羟孕酮（MEDA）、苯甲酸雌二醇（BES）、己烯雌酚（DES）及代谢物双烯雌酚（DEN）、玉米赤霉醇（ZER）及代谢物玉米赤霉酮（ZEAR）、玉米赤霉烯醇（ZEL）、玉米赤霉烯酮（ZEN）。动物组织经均质后,用叔丁基甲基醚和乙酸盐缓冲液加酶解剂分别提取试样中的残留激素及代谢物,经硅胶柱和Oasis柱净化,应用LC-MS/MS大气压化学电离正方式（APC I＋）、负方式（APC I-）和电喷雾电离正方式（ESI＋）,以多反应离子监测（MRM）方式进行检测,方法检测能力（CCβ）为0.028～0.273 ng.g^-1。选用ZER-d4、DES-d8和MEDA-d3的同位素标记物作内标,内标法定量。在0.5～10 ng.g^-1范围内回收率为51%～120%。     

Effects of flour or flaxseed oil upon testis mass in rats subjected to early weaning

Study evaluates testis mass in rats subjected to early weaning and subsequently nourished with diet containing flour or flaxseed oil. Pups were weaned for separation from mothers at 14 days (early weaning, EW) and 21 days (control, C). After 21 days, the control group (C60) was nourished with control diet. EW was divided as: control (EWC60), flaxseed flour (EWFF60) and flaxseed oil (EWFO60) group diets for the next 60 days. At 21st and 60th day, body mass, serum cholesterol and triglycerides and testis mass were evaluated. At 21 day, EW group showed lower (p < 0.05) body mass, serum cholesterol and testis mass. At 60 days, EWC60 and EWFO60 groups showed lower (p < 0.05) body mass (vs. C60 and EWFF60). EWFF60 group showed lower (p < 0.05) serum cholesterol (vs. EWC60 and EWFO60) and higher (p < 0.05) testis mass (vs. C60, EWC60 and EWFO60). Flaxseed flour (vs. oil) was associated with higher testis mass following early weaning.