响应面优化丁烷-亚临界法制取桐油技术的研究     

张爱华  刘琦  贾维肖  李昌珠  肖志红  何明宏 《湖南林业科技》2017,44(2)

桐油是一种重要用途的干性油脂,不同工艺会对油品质量产生重要影响。为了克服传统工艺在制油中的缺陷,本研究采用丁烷-亚临界法工艺进行桐油的制备,并基于Design-Expert软件进行响应面优化实验,获得最佳工艺参数:萃取温度40.64℃,萃取时间45.38 min,原料颗粒度39.71目,在此条件下桐油得油率达到66.12%。采用气质联用仪分析了桐油脂肪酸组成为α-桐酸74.93%,亚油酸8.62%,油酸7.12%,棕榈酸2.72%,硬脂酸3.85%,通过分析所得油样的5项指标,可知该工艺所得油品满足国标要求。  相似文献   

Study on Developmental Expression of ApoCⅡ Gene mRNA in Liver Tissues of Pigs     

LIU Cui-cui  GUO Xiao-hong  CAO Guo-qing  GAO Peng-fei  PU Zhong-de  NIU Jiao-yan  ZHANG Qi  LI Meng  JIN Yu-shu  LI Bu-gao 《中国畜牧兽医》2015,42(10):2726-2731

The aim of this study was to investigate the developmental patterns of ApoCⅡ gene mRNA in liver in Mashen and Large White pigs, and study the relationship between the expression level of ApoCⅡ and the lipid metabolism in pigs.The mRNA relative expressions of ApoCⅡ gene in liver at seven stages of 1,30,60,90,120,150,and 180-day old in Mashen and Large White pigs were determined by quantitative Real-time PCR.The results showed that the developmental trend of ApoCⅡ mRNA expression in liver between Mashen and Large White pigs was different.The ApoCⅡ mRNA abundance was decreased from birth to 60-day old,then increased at 90-day old,and decreased again after that in Mashen pig.However,the relative expression amount in Large White pig was gradually decreased from birth to 150-day old and increased again at 180-day old.Except for the ApoCⅡ mRNA expression amount at 1-day old,the differences of the expression amount at other stages in Mashen and Large White pigs were significant or extremely significant (P<0.05 or P<0.01).The ApoCⅡ mRNA expression in liver was affected by age and breed,and could play an important role in lipid metabolism in pigs.  相似文献   

A framework for a regional integrated food security early warning system: a case study of the Dongting Lake area in China     

Xiaoxing Qi  Laiyuan Zhong  Liming Liu 《Agriculture and Human Values》2015,32(2):315-329

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绿色环保型循环冷却水处理技术     

李明言  王艳秋  李想道  薛冰  付宁 《绿色科技》2015,(7)

分析了当前绿色环保的循环冷却水的处理工艺、现状、机理和应用情况，指出了绿色环保型循环冷却水的重要性，以期引起业内的重视并提供参考。  相似文献   

Preparation of Adjuvant Diluent for Live Vaccine against Classical Swine Fever and Evaluation of its Immune Effects     

LIANG Kong-xian  LV Xiao-jun  DING Dan  XU Qi  ZHOU Jie  LIU Wei 《中国畜牧兽医》2015,42(9):2467-2473

The aim of this study was to develop a novel oil-in-water (O/W) emulsion as adjuvant diluents (AD) for live vaccine against classical swine fever (CSF) that could effectively enhance the immune effect of vaccine.The AD was prepared by high-pressure homogenization technique.Formulations and preparation parameters were optimized with response surface design.Its stability, particle size, polydispersity (PDI) and Zeta potential were characterized.The humoral immune response and cellular immune response of the AD were evaluated with BALB/c mice by intramuscular injection.The particle size of the AD prepared by optimized formulation and parameters was 100.4 nm, PDI was 0.147, and Zeta potential was —28.7 mV.The experiment results showed that the AD had good stability.The AD was inoculated combined with live vaccine against CSF into BALB/c mice by intramuscular injection.The results showed that the live vaccine against CSF specific immune responses could be evoked in mice by co-inoculation with AD and vaccine.The cellular immune response levels in co-inoculated groups were significantly higher than control group (P<0.05), with obvious phenomena of higher levels of IFN-γ, IL-6 and IL-4 in serum.The result revealed that cellular immune capability significantly improved with the AD.The results strongly revealed that cellular immune capability significantly improved by introducing AD for effective immune-adjuvant for live vaccine against CSF.  相似文献   

硫酸蒽酮法测定柑橘属植物多糖的研究     

程立超  徐祺 《中国林副特产》2020,(2):27-28

采取浸提法从丑橘、甜橙、甜心柚、血橙、芦柑5种柑橘属果皮中提取多糖并测定其含量。结果表明,血橙果皮中含糖量在5种果皮中最低,其次为甜橙果皮、甜心柚果皮、芦柑果皮,丑橘果皮中含糖量在5种果皮中最高。甜橙果皮和甜心柚果皮含糖量差距不大。  相似文献   

重金属污染土壤几种生物修复方式比较   总被引：2，自引：0，他引：2  

赵首萍  叶雪珠  张棋  肖文丹 《中国农学通报》2020,36(20):83-91

土壤重金属污染是全球普遍存在的问题,生物修复因其环境友好且成本效益高而得到广泛关注。但不同生物修复技术有其优势和局限性,充分了解每种修复技术的特点,才能更经济、有效地对污染土壤进行修复。本研究阐述对比了目前的土壤重金属生物修复方法,包括植物修复（植物挥发、植物固定和植物提取）、转基因植物提取、螯合辅助植物修复、微生物辅助植物修复等技术的机制、优势、局限性和适用性等方面的差异。综述提出有效的生物修复技术需要土壤化学、植物生物学、遗传学、微生物学和环境工程等多学科的有机结合。根据污染土壤的特点,结合具有相应改良特性的转基因植物,是实现污染土壤大面积修复的有效方法。同时,农艺措施对天然超级积累植物的生物量和重金属提取能力的刺激作用还需要进一步挖掘。植物修复可以与其他几种传统修复技术有效结合,利用转基因技术建立土壤+植物+微生物的组合是未来修复技术发展的最佳途径。  相似文献   

朝阳市酿酒葡萄‘威代尔’虫害调查初报     

祁崇祝  张俊生  林玉友 《北方果树》2011,(6):15-16

作者针对朝阳地区酿酒葡萄主要虫害种类及发生规律进行调查研究,以便有针对性进行防治。调查研究发现,主要虫害种类有短须螨、蓟马和蒙古灰象甲,发生高峰期在早春,所以虫害防治重点在葡萄出土上架时期。  相似文献   

厦门市忠仑公园药用植物园规划设计初步探析     

穆颖  廖启炓 《林业科技情报》2020,52(1):91-94

随着景观改造的多样性,药用植物园也成为城市园林营造景观的一种方式。厦门市忠仑公园集科普、教育、观赏功能为一体,药用植物园区景观改造以人为本,以科普教育为宗旨,在保证药用植物景观的基本功能的前提下,塑造优美的景观,既能弘扬中华民族药用文化知识,又能为周边居民提供一个互动学习科普知识、修养身心的场所。  相似文献   

微生物在环境保护中的应用及前景     

姜琪 《计算机与农业》2011,(7):120-122

从环境保护的角度出发,重点论述了微生物在这一领域的应用现状与发展前景,指出微生物将会在21世纪的环境保护领域中发挥重要作用。  相似文献