液态奶生产新设备和工艺     

郭瑞雪  郭俭 《中国乳业》2021,(12):137-140

液态奶包括巴氏杀菌奶、UHT超高温灭菌奶等。目前国内采用的液态奶杀菌工艺是热处理法。但通过热处理法的液态奶仍可能残留休眠芽孢,给液态奶产品带来潜在风险。本文通过研究目前液态奶杀菌工艺的种类和存在问题,申报了发明专利“一种能延长液态奶保质期的生产方法”和“一种能使液体隔离空气的无菌罐体”,并利用氢医学制作含氢乳制品,实现了提高液态奶品质,延长保质期,获得氢分子医学效应。  相似文献   

Fractalkine and CX3CR1 have intimate relationships with chemotaxis and adhesion of leukocyte     

JIN Liang  WANG Bai-ren  JU Gong 《园艺学报》2000,16(12):1327-1330

Fractalkine has been recognized as the first member of the fourth chemokine family recently and its receptor, CX3CR1, was ident ified afterwards. This pair of ligand/receptor play important roles in the migration and adhesion of peripheral leukocyte through different ways. They are also likely to be related to the embryogenesis and regeneration of several organs and may possess some functions in the central nervous system.  相似文献   

Adhesion of bone marrow stromal cell in children with acute lymphoblastic leukemia     

HUANG Yun  LI Shu-nong  LI Xiao-yu  LIN Sui-zhen  LUO Xue-qun  QIN Zhao-yuan 《园艺学报》2000,16(8):713-717

AIM and METHOD: The adhesion behavior of bone marrow stromal cells(BMSC) in children with acute lymphoblastic leukemia(ALL) to bone marrow mononuclear cells(BMMC) and Raji cells were investigated by MTT method. The expression of adhesion molecules ICAM-1 and VCAM-1 were detected by flow cytometry. RESULTS: The adhesion ability of BMSC in acute period of ALL to BMMC was lower than that of control group. The adhesion ability of BMSC in long term remission period of ALL to Raji cells higher than that of control group. The expression of ICAM-1 on the surface of BMSC in acute period of ALL is much lower than that of control group. CONCLUSIONS: The adhesion of BMSC to BMMC or tumor cells in children with ALL was abnormal. The abnormal adhesion behavior might be partially due to the changed expression of adhesion molecules on BMSC.  相似文献   

油菜联合收获机筛面粘附物摩擦特性   总被引：6，自引：0，他引：6  

李耀明  马征  徐立章 《农业机械学报》2010,41(12):54

The main ingredients and structure of rape adhesive materials on cleaning sieve were analyzed for sieve hole blocking and multiply increased cleaning loss caused by the adhesive materials. Size distribution of rape adhesive materials on cleaning sieve was obtained. 77% of the adhesive materials’ size were from 0.3mm to 2.5mm, and the main ingredients were distinctly different with different size range. Friction coefficient tests of rape nutshell, rape stalk & the adhesive materials were carried out. It was pointed out that their friction coefficients were commonly increased with the raise of their moisture, and the friction coefficients between the adhesive materials and metal reached to 0.71.  相似文献   

High-throughput screening reveals small molecule modulators inhibitory to Acidovorax citrulli     

Yu Lu  Loïc Deblais  Gireesh Rajashekara  Sally A. Miller  Yorsa A. Helmy  Haijun Zhang  Ping Wu  Yanhong Qiu  Xiulan Xu 《Plant pathology》2020,69(5):818-826

Acidovorax citrulli is a seed-transmitted gram-negative bacterium that can cause substantial economic yield loss in watermelon and melon production worldwide. Four small-molecule libraries containing 4,952 compounds were selected for high-throughput screening against A. citrulli wild-type strain Xu3-14 by evaluation of growth inhibition. One hundred and twenty-seven molecules (2.5% hit rate) were identified as bactericidal or bacteriostatic against A. citrulli at 100 μM. Secondary screens indicated that 27 candidate compounds were more effective against A. citrulli Group II strains than Group I strains (classified using repetitive element PCR). Several compounds were inhibitory to other pathogenic bacteria, including Clavibacter michiganensis subsp. michiganensis and Xanthomonas campestris pv. campestris, but did not affect the growth of plant beneficial bacteria Pseudomonas fluorescens and Bacillus subtilis. More than half of the compounds did not inhibit germination of Arabidopsis or watermelon seeds. The effect of small molecules on A. citrulli seed-to-seedling transmission was evaluated by applying each compound to inoculated watermelon seeds and assessing seedling infection. Nine compounds were chosen for further investigation based on their reduction of percentage seedling infection and compiling scores on their specificity, sensitivity, and phytotoxicity obtained in the secondary screens. The five best compounds were selected (thiamphenicol, nadifloxacin, pipemidic acid, ciclopirox, and zinc pyrithione) for greenhouse tests and were found to effectively reduce the seed-to-seedling transmission of A. citrulli in both artificially and naturally infested seeds. These top five compounds provide a basis for future development of an A. citrulli-specific bactericide.  相似文献   

一氧化碳(CO)在植物体内的生理生化作用研究进展     

王琼  郭毅晶  康琳  张少颖  于有伟  宋小青 《中国农学通报》2020,36(12):86-90

为了促进一氧化碳(CO)在植物生理生化方面的研究,本文归纳了CO在植物体中的生物合成途径,CO作为信号分子对植物各种生理功能的调控,以及CO与其他信号分子之间的相互作用。经过分析得出,CO在植物生物胁迫过程中的作用及其作用机制方面的研究还很少,因此,CO在这方面的研究将会成为今后的研究重点。  相似文献   

具有潜在抑制肠道致病菌能力的乳酸菌的筛选     

陈大卫  刘莎莎  黄玉军  郭蕾  张蓉 《安徽农业科学》2017,45(34):78-80,122

[目的]从实验室保藏的乳酸菌中筛选出耐酸耐胆盐能力较强的乳酸菌,并研究其对肠上皮细胞的黏附能力及对肠道病原菌的抑制能力。[方法]通过模拟人工胃肠液及体外与IEC-6细胞共培养来分别研究乳酸菌的耐酸耐胆盐能力及对细胞的黏附能力,并利用单层琼脂平板扩散法测定其抑菌效果。[结果]试验的27株乳酸菌中,10株乳酸菌在p H 3.0的人工模拟胃液中培养3 h的存活率均大于44.00%,在p H 8.0的人工模拟肠液中培养4 h的存活率均大于51.56%,在含0.30%胆盐的培养基中培养24 h的存活率均大20.00%;其中菌株C13、A03、A17及A90对IEC-6细胞的黏附个数均大于8个/cell;菌株C13、A03对艰难梭菌、沙门氏菌和大肠杆菌的抑制能力较强,抑菌圈直径均大于22 mm。经16S rRNA测序将C13和A03分别鉴定为鼠李糖乳杆菌(Lactobacillus rhamnosu)和植物乳杆菌(Lactobacillus plantarum)。[结论]L.rhamnosu C13、L.plantarum A03的耐酸耐胆盐能力及对上皮细胞的黏附能力较强,对肠道病原菌有较好的抑制作用,可作为良好的抑制肠道病原菌的候选益生菌株。  相似文献   

黏红酵母对牙鲆肠黏液黏附及肠道定植规律的研究     

李正  李健  刘淇  王群 《安徽农业科学》2008,36(17):7271-7272

[目的]研究黏红酵母(Rhodotorula glutinis)、鼠李糖乳杆菌(Lactobacillus rhamnosus)、纳豆芽孢杆菌(Bacillus natto)、嗜酸乳杆菌(Lactobacillus casei)对牙鲆肠黏液的黏附能力,探讨黏红酵母在牙鲆肠道中的定植规律及对牙鲆抗病能力的影响。[方法]采用体外黏液黏附模型测定上述4株益生菌的黏液黏附能力,平板菌落计数法测定黏红酵母在肠道的数量。[结果]黏红酵母对牙鲆肠黏液黏附能力最强,其次是鼠李糖乳杆菌,纳豆芽孢杆菌黏附能力最弱。投喂含黏红酵母饲料的牙鲆肠道其酵母数量达到了103～104cfu/g内含物。鳗弧菌攻毒后,对照组牙鲆死亡率显著高于黏红酵母组。[结论]黏红酵母在牙鲆肠道具有较好定植潜能并能降低牙鲆因弧菌引起的死亡率,因此具有较好的应用前景。  相似文献   

植物系统获得抗性中的信号   总被引：5，自引：0，他引：5  

梁元存  刘爱新 《山东农业大学学报(自然科学版)》2001,32(2):251-255

系统介绍了植物系统获得抗性中的信号，包括水杨酸（SA）、茉莉酸（JA）及其甲酯（MeJA)、系统素（systemin)、乙烯等信号分子和电信号。  相似文献   

Attachment and adhesion of conidia of Stagonospora nodorum to natural and artificial surfaces     

E. Zelinger  C.R. Hawes  S.J. Gurr  F.M. Dewey   《Physiological and Molecular Plant Pathology》2006,68(4-6):209-215

Attachment and adhesion of conidia of a wheat-isolate of Stagonospora nodorum to leaf and artificial surfaces was studied. Attachment of conidia was a non-viable process, separate from adhesion, that occurred rapidly and irreversibly. Attachment involved conidial-surface carbohydrates and was partially influenced by surface hydrophobicity. The subsequent adhesion, via the secretion of extracellular matrix from conidia, was a viable process that induced the complete cover of conidia in response to wheat leaf surface components containing epi-cuticular wax and to a lesser extent to barley but inducing only partial covering on glass. Results suggest that specific surface components from the compatible host promote rapid attachment and adhesion of S. nodorum conidia.  相似文献