鸡蛋酸乳制品的研制

以鸡蛋和鲜牛奶(或奶粉)、白砂糖为主要原料,在确定培养温度的前提下,通过L9(34)正交实验,研究了稳定剂的种类和数量、蛋液替代度、蛋的稀释倍数、加糖量及接种量等对酸凝蛋乳质量的影响。结果表明,w(明胶)=0.8%(或0.2%瓜尔豆胶+0.1%果胶)、w(蛋液)=40%、m(蛋液)∶m(H2O)=1∶5、w(糖)=7%、w(菌种)=3%时,酸奶质量最佳。     

不同磷水平对砷污染土壤中油菜生长的影响

采用盆栽试验研究了不同磷肥水平对砷污染土壤中油菜生长和吸收累积砷的影响.结果表明,在200 mg/kg砷污染土壤中,没有施入磷肥的情况下,油菜几乎不能生长,植株僵硬,趋于死亡,产量极低.当分别施人0.2 g/kg和0.4以g磷肥后,油菜株高、生物量和产量等指标均显著提高,砷毒害作用显著降低.在P0.2和P0.4两个磷水平下,油菜根系砷含量较对照分别提高171％和111％;茎叶中砷含量较对照分别提高24.45％和13.0％;角果皮中砷含量较对照分别增加44.49％和345％.磷肥的施用,显著提高了砷在油菜各部位的含量.与P0.2处理相比,P0.4处理下油菜根系、茎叶中砷含量有降低趋势,但角果皮中砷含量显著增加.不同浓度磷肥的施用促进了砷由地下向地上部分转移,尤其是向角果皮中转移.随着土壤中磷浓度的增加,油菜籽粒中砷含量也逐渐增加.但均没有超过0.7mg/kg国家安全标准.     

应用灰色关联度分析筛选香菇优良杂交子

以香菇(Lentinula edodes)5个优良栽培菌株为亲本,设计3对杂交组合,获得55个杂交菌株,其中19个杂交菌株出菇正常。采用灰色关联度分析法,从菌盖厚度、菌柄直径、平均单菇重等8个性状对19个杂交菌株进行综合评价。在3对杂交组合中,QK-8、QK-15、W-2、W-13和Q6-12等5个杂交菌株的关联度排名较靠前,农艺性状和子实体性状也明显优于亲本和其它杂交菌株。     

Correlation between DDAH2 gene polymorphism and coronary heart disease

AIM: To investigate the relationship between single nucleotide polymorphism (SNP) of dimethylarginine dimethylamino acid hydrolase (DDAH) gene and coronary heart disease (CHD) in Chinese population. METHODS: The polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) and ligase detection reaction (LDR) were used to detect the genotypes of SNP rs805305 and rs2272592 in 192 controls and 165 patients with coronary heart disease (CHD). RESULTS: Both the frequency of rs805305 CG+GG or G allele and the frequency of rs2272592 GA+AA or A allele had no significant difference between CHD and control (P＞0.05). These results were independent of age, gender, hypertension, diabetes and hyperlipidemia. CONCLUSION: The rs805305 and rs2272592 polymorphism of DDAH2 gene might not be related to the coronary heart disease (CHD) in Chinese.     

Vasodilatatory effect and mechanism of CH2Cl2 extract of flos magnoliae on isolated rat thoracic aorta

AIM: To characterize the vasodilatatory effect of CH₂Cl₂ extract of flos magnoliae (CEF) on isolated rat thoracic aorta and to elucidate its possible mechanism. METHODS: The thoracic aorta was isolated from male Sprague-Dawley (SD) rats and the isometric tension of aortic rings with or without endothelium was measured. RESULTS: CEF (0.1-1 000 mg/L) produced concentration-dependent, endothelium-independent relaxations in phenylephrine (PE)-contracted aortic rings. The maximum relaxation induced by CEF was 78.68%±6.03% in endothelium intact rings and 64.98%±13.90% in endothelium removed rings while the forskolin (1 μmol/L)-induced vasodilation was obtained as 100%. The vasodilatatory effect of CEF was not statistically inhibited by 10 μmol/L glibenclamide (Glib), 3 mmol/L tetraethylammonium (TEA), 100 μmol/L BaCl₂ and 10 μmol/L 1H- -oxadiazole- -quinoxalin-1-one (ODQ) in the preparations without endothelium. The CEF pre-treatment significantly inhibited vasoconstrictions to angiotensin Ⅱ (AngⅡ), prostaglandin F_2α, (PGF_2α), dopamine (Dopa), vasopressin (Vaso), 5-hydroxytryptamine (5-HT) and PE by 91.31%, 82.11%, 95.32%, 90.53%, 72.22% and 83.63%, respectively (P<0.01). In Ca²⁺-free medium treated endothelium removed aortic ring, incubation with CEF at concentration of 82 mg/L significantly attenuated intracellular Ca²⁺ release by PE. In Ca²⁺-free + high potassium medium incubated aortic rings without endothelium, CEF (82 mg/L) markedly inhibited potassium-stimulated Ca²⁺-dependent contraction which was mainly due to Ca²⁺ influx (P<0.01).CONCLUSION: CEF induced vasorelaxation is mainly related to interfering intracellular calcium homeostasis by blocking Ca²⁺ influx and intracellular Ca²⁺ release.     

河套灌区番茄脐腐病的发生与防治

河套灌区番茄脐腐病发生较重,主要原因是番茄开花坐果后不再灌水,不能满足番茄正常生长的水分需求;施肥以化肥为主,重施氮肥,少施磷钾肥,不施钙肥,导致植株缺钙;河套灌区土壤盐渍化较高,生产中存在连茬、耕作管理粗放等。防治番茄脐腐病应从水分均衡供应、垄沟种植、增施有机肥、减施化肥和叶面补钙等方面着手。     

桑叶粉对鸡蛋蛋黄胆固醇含量和脂肪酸组成的影响

分析了在饲料中添加不同量的桑叶粉对鸡蛋蛋黄胆固醇含量和脂肪酸组成的影响,结果表明:不同桑叶添加量对鸡蛋蛋黄胆固醇含量及脂肪酸组成具有显著影响,当饲料中添加7%桑叶时,与未添加桑叶组相比,其蛋黄胆固醇含量下降9.24%,多不饱和脂肪酸比例增加23.63%,因此桑叶对提升鸡蛋品质具有显著的作用。     

图书馆危机管理的内容框架和发展现状研究

对图书馆危机管理的发展阶段进行了总结,建立了图书馆危机管理研究的内容框架,分析了我国图书馆危机管理研究的发展现状,并简要阐述了我国图书馆危机管理研究的发展方向.     

黑龙江省杂交粳稻产量与农艺性状灰色关联分析

在哈尔滨地区对9个杂交粳稻组合材料进行栽培试验,采用灰色关联度分析法对杂交粳稻产量与农艺性状进行关联度分析。结果表明：穗长x4,千粒重x8,株高x1和活动积温x3对产量影响较大;关联度大小顺序为：穗长x4〉千粒重x8〉株高x1〉活动积温x3〉穗数x7〉穗粒数x5〉根干重x2〉结实率x6。说明提高杂交粳稻产量首先应该考虑...     

引种杂交粳稻在哈尔滨的生长发育研究

以国家杂交水稻工程技术中心天津分中心提供的H5/LK60、H5/H15、H5/R48、H5/R42、垦稻12/R48、垦稻12/R42、垦稻12/LK60、垦稻12/H15和垦稻12/花28杂交粳稻为试验材料,在哈尔滨生态区域进行了栽培试验研究。结果表明：杂交粳稻在寒冷地区具有明显的杂交优势,与当地普通水稻品种相比返青早,分蘖能力强,穗数和穗粒数多,库容量大,在2010年没有遇低温情况下,其产量比对照平均增加25%左右,在哈尔滨市具有广阔的市场前景。