检索结果-南通市图书馆

Dietary methylmercury and n-3/n-6 ratio affects lipid metabolism in Atlantic salmon

在线全文

学校读者我要写书评

暂无评论

Dietary methylmercury and n-3/n-6 ratio affects lipid metabo...

饲料中大豆油替代鱼油对大西洋鲑肝细胞脂肪酸代谢的影响

The 14th International Symposium on Fish Nutrition & Feeding

作者： bente e.torstensen Lise Andreasen Pal A.Olsvik Heidi Amlund National Institute of Nutrition and Seafood research(NIFeS) P.O.Box 2020Nordnes5817BergenNorway National Institute of Nutrition and Seafood research(NIFeS) P.O.Box 2020Nordnes5817BergenNorway.Current address:EWOSBergenNorway

Fish farming has expanded dramatically during the last few decades,and the increasing demand for fish oil for feed production has forced the industry to search for alternative lipid sources,among them vegetable ***,focus on seafood safety has increased in recent years. Among the contaminants,is methylmercury(MeHg) of great concern,since it is highly toxic and damages the nervous *** consumption on the other hand,has positive effects on both coronary heart diseases and mental health,due to the high content of n-3 highly unsaturated fatty acids(HUFA).Thus,the interaction between MeHg and fish oil in both fish and humans is of great *** objective of the present study was to assess the effects of replacing fish oil (high dietary n-3/n-6 ratio) by soybean oil(low dietary n-3/n-6 ratio) in combination with MeHg in Atlantic salmon(Salmo salar L.) on lipid metabolism and MeHg accumulation.

关键词： Interaction fatty acids and mercury Atlantic salmon gene expression Lipid metabolism Methylmercury toxicity Kinetics

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

动物营养学报 2013年第11期25卷 2623-2632页

作者：周继术 torstensen bente elisabeth STUBHAUG Ingunn 吉红西北农林科技大学动物科技学院杨凌712100 挪威国家海产品营养研究所挪威斯克雷廷水产研究中心

为探讨大豆油替代鱼油对大西洋鲑(Salmo salar L.)肝细胞脂肪酸代谢的影响,本试验分别以鱼油和大豆油为脂肪源配制2种试验饲料,并分别饲喂大西洋鲑幼鲑5个月。饲养结束后,分离和培养大西洋鲑肝细胞,一方面将细胞与碳14标记油酸([1-14C]... 详细信息

为探讨大豆油替代鱼油对大西洋鲑(Salmo salar L.)肝细胞脂肪酸代谢的影响,本试验分别以鱼油和大豆油为脂肪源配制2种试验饲料,并分别饲喂大西洋鲑幼鲑5个月。饲养结束后,分离和培养大西洋鲑肝细胞,一方面将细胞与碳14标记油酸([1-14C]OA)共孵育,然后测定细胞和细胞内各脂质成分以及脂肪酸β-氧化产物的放射活性;另一方面提取肝细胞总RNA,采用实时荧光定量聚合酶链式反应(RT-qPCR)测定脂肪酸结合蛋白3(FABP3)、脂肪酸结合蛋白10(FABP10)、Δ5去饱和酶(D5D)、Δ6去饱和酶(D6D)及肉碱棕榈酰转移酶Ⅰ(CPT-Ⅰ)基因的相对表达量。结果表明:1)鱼油组与大豆油组肝细胞内游离脂肪酸(FFA)放射活性百分率分别为(62.7±13.0)%和(55.9±9.1)%,2组间无显著差异(P>0.05);鱼油组与大豆油组肝细胞内磷脂(PLs)放射活性百分率分别为(20.9±8.7)%和(17.9±5.4)%,2组间无显著差异(P>0.05);鱼油组肝细胞内三酰甘油(TAG)放射活性百分率为(2.0±0.9)%,显著高于大豆油组的(0.8±0.4)%(P0.05)。2)大豆油组肝细胞中FABP3、D6D、D5D基因的相对表达量均显著高于鱼油组(P0.05)。由此可见,大豆油替代饲料中的鱼油对大西洋鲑肝细胞内FFA、PLs合成及脂肪酸β-氧化等脂肪酸代谢途径无显著影响,但显著降低了肝细胞内TAG的合成,促进了肝细胞内脂肪酸的去饱和,因此大豆油替代鱼油在一定程度上影响了肝细胞内脂肪酸代谢。

关键词：大豆油鱼油大西洋鲑肝细胞脂肪酸代谢

Predicting the outcome of closed-loop small bowel obstruction by preoperative characteristics

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Surgery 2022年第6期14卷 556-566页

作者： Masja K Toneman bente M de Kok Frank M Zijta Stanley Oei Gijs J D van Acker Marinke Westerterp Anne e M van der Pool Department of Surgery Haaglanden Medical CentreThe Hague 2512 VANetherlands Department of Radiology Haaglanden Medical CentreThe Hague 2512 VANetherlands

BACKGROUND Closed-loop small bowel obstruction(CL-SBO)can threaten the viability of the intestine by obstructing a bowel segment at two adjacent *** recognition and surgery are *** To analyze the outcomes of patients who underwent surgery for CL-SBO and to evaluate clinical *** Patients who underwent surgery for suspected CL-BSO on computed tomography(CT)at a single center between 2013 and 2019 were evaluated *** were divided into three groups by perioperative outcome,including viable bowel,reversible ischemia,and irreversible *** and laboratorial variables at presentation were compared and postoperative outcomes were *** Of 148 patients with CL-SBO,28(19%)had a perioperative viable small bowel,86(58%)had reversible ischemia,and 34(23%)had irreversible *** with a higher age had higher risk for perioperative irreversible ischemia[odds ratio(OR):1.03,95%confidence interval(CI):0.99-1.06].Patients with American Society of Anaesthesiologists(ASA)classification≥3 had higher risk of perioperative irreversible ischemia compared to lower ASA classifications(OR:3.76,95%CI:1.31-10.81).eighty-six patients(58%)did not have elevated C-reactive protein(>10 mg/L),and between-group differences were *** in-hospital stay was significantly longer for patients with irreversible ischemia(median 8 d,P=0.001)than for those with reversible ischemia(median 6 d)or a viable bowel(median 5 d).Postoperative morbidity was significantly higher in patients with perioperative irreversible ischemia(45%,P=0.043)compared with reversible ischemia(20%)and viable bowel(4%).CONCLUSION Older patients or those with higher ASA classification had an increased risk of irreversible ischemia in case of *** irreversible ischemia,postoperative morbidity was increased.

关键词： General surgery Laparoscopy Laparotomy Critical care Intestinal obstruction Morbidity

植物油替代鱼油的饲料对大西洋鲑肝细胞4个应激基因表达的影响

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

水产科学 2014年第4期33卷 208-213页

作者：周继术 Ingunn Stubhaug Anne Krovel Pal A Olsvik bente e.torstensen 吉红西北农林科技大学动物科技学院水产科学系陕西杨凌712100 挪威国家海产品营养研究所挪威卑尔根5817

在水温10℃、盐度32～34条件下，将体质量（165±15） g的大西洋鲑幼鲑100尾平均分为两组，并分别投喂以鱼油和大豆油为油源的两组试验饲料，经过5个月的饲养，称取鱼体质量后，每组随机采取3尾鱼的肝脏样品进行脂肪酸组成测定，另外每... 详细信息

在水温10℃、盐度32～34条件下，将体质量（165±15） g的大西洋鲑幼鲑100尾平均分为两组，并分别投喂以鱼油和大豆油为油源的两组试验饲料，经过5个月的饲养，称取鱼体质量后，每组随机采取3尾鱼的肝脏样品进行脂肪酸组成测定，另外每组随机选取3尾鱼，分离并培养其肝细胞，24 h后以TRIZOL法提取肝细胞总RNA ，以RT-PCR法检测谷胱甘肽过氧化物酶、热应激蛋白70、金属硫蛋白和泛素等4个应激基因的相对表达量，以研究不同油质对大西洋鲑应激状态的影响。试验结果表明，两组间大西洋鲑的终末体质量差异不显著（P＞0．05），而大西洋鲑肝脏脂肪酸组成受饲料脂肪酸组成的影响，同时植物油组的泛素等4个基因的相对表达量均显著高于鱼油组（P＜0．01），表明在植物油源试验饲料的饲喂下，大西洋鲑肝细胞处于更高的应激状态，为大西洋鲑饲料油源的合理选择提供了有益参考。

关键词：植物油鱼油大西洋鲑肝细胞应激基因

Biochar in Nutrient Recycling—The effect and Its Use in Wastewater Treatment

在线全文

学校读者我要写书评

暂无评论

Open Journal of Soil Science 2015年第2期5卷 39-44页

作者： bente Foereid Bioforsk—Norwegian Institute for Agricultural and environmental Research As Norway

Biochar, i.e. charred organic material, appears to increase nutrient retention in soil. The mechanism for how this happens is not clear. Here two possible mechanisms, adsorption and microbial immobilisation, are suggested and compared. It is also suggested that we use biochar in wastewater treatment, and so potentially integrate it better into the total waste management cycle.

关键词： Biochar Nutrients Wastewater Treatment

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

X80厚壁管道自动环焊接头性能研究

热加工工艺 2023年第23期52卷 40-44页

作者：何小东马本特孙頔杨叠侯宇中国石油集团石油管工程技术研究院陕西西安710077 中石化石油工程设计有限公司山东东营257026 中国石油天然气管道工程有限公司河北廊坊065000 中国石油天然气管道科学研究院有限公司河北廊坊065000 国家管网集团建设项目管理分公司河北廊坊065000

分别采用GMAW自动焊和GTAW+FCAW-G组合自动焊两种工艺,对φ1422 mm×32.1 mm的X80钢管进行了环焊缝焊接。借助常规拉伸和示波冲击试验测试了环焊缝接头的强度和韧性,并采用宽板拉伸试验方法测试了带缺陷环焊缝接头的应变容量和结构可靠... 详细信息

分别采用GMAW自动焊和GTAW+FCAW-G组合自动焊两种工艺,对φ1422 mm×32.1 mm的X80钢管进行了环焊缝焊接。借助常规拉伸和示波冲击试验测试了环焊缝接头的强度和韧性,并采用宽板拉伸试验方法测试了带缺陷环焊缝接头的应变容量和结构可靠性。结果表明,采用GMAW自动焊,匹配eR80S-G实心焊丝所焊接的X80环焊缝接头为高强匹配;采用GTAW+FCAW-G组合自动焊,匹配eR55-Ni1和e91T1-K2MJ焊丝所焊接的X80环焊缝接头为等强匹配;两种工艺的环焊接头均具有较好的低温韧性,焊缝和热影响区的韧脆转变温度分别低于-65℃和-45℃;即使存在尺寸为50 mm×3 mm的焊接缺陷,GMAW自动焊、GTAW+FCAW-G组合自动焊接头的平均拉伸应变容量分别为6.0%、3.5%,说明这两种环焊缝接头在拉伸载荷下也是安全可靠的。

关键词：自动焊 X80钢管强度韧脆转变应变容量

在线全文

学校读者我要写书评

暂无评论

棉铃虫幼虫脑和咽下神经节的三维结构构建

昆虫学报 2014年第5期57卷 538-546页

作者：汤清波詹欢 bente G.BeRG 闫凤鸣赵新成河南农业大学植物保护学院昆虫学系郑州450002 Department of Psychology Neuroscience UnitNorwegian University of Science and TechnologyN-7489 TrondheimNorway

【目的】解剖棉铃虫Helicoverpa armigera(Hübner)5龄幼虫脑和咽下神经节及其内部神经髓形态结构,并分析和构建幼虫脑和咽下神经节以及各神经髓的三维结构模型。【方法】采用免疫组织化学方法解剖脑和咽下神经节的内部神经髓结构,利用... 详细信息

【目的】解剖棉铃虫Helicoverpa armigera(Hübner)5龄幼虫脑和咽下神经节及其内部神经髓形态结构,并分析和构建幼虫脑和咽下神经节以及各神经髓的三维结构模型。【方法】采用免疫组织化学方法解剖脑和咽下神经节的内部神经髓结构,利用激光共聚焦显微镜获取脑和咽下神经节扫描图像,然后利用AMIRA三维图像分析软件进行图像分析,从而构建脑和咽下神经节的三维结构模型,并测量脑和咽下神经节以及内部各神经髓的体积,并分析了相对比例。【结果】棉铃虫5龄幼虫脑和咽下神经节由围咽神经索连接在一起。脑主要由前脑、中脑和后脑3部分组成。前脑内包括视叶、蕈形体和中央体等形态结构较明显的神经髓。此外,前脑还包括其他位于脑的左右两侧以及背侧和腹侧大量神经髓区域,约占脑总神经髓的59.65%。这些神经髓区域边界不明显。中脑主要包括1对触角叶;后脑位于脑的腹侧和触角叶的下方,体积较小。咽下神经节由3个神经节融合构成,从前到后分别为上颚神经节、下颚神经节和下唇神经节,由于融合的紧密程度高,3个神经节间的边界不明显。【结论】阐明了棉铃虫5龄幼虫脑和咽下神经节的神经髓形态结构,构建了脑和咽下神经节以及内部神经髓的三维结构模型。三维模型可以任意旋转,能从任何角度观察脑、咽下神经节和内部不同神经髓的结构及其它们之间的空间关系。本研究结果对研究棉铃虫脑和咽下神经节信息接收、处理及调控行为的机制奠定了解剖学基础。

关键词：棉铃虫脑咽下神经节神经髓三维结构

Acoustic Myography in Assessment of Isokinetic and Isometric Muscle Strength in a Healthy Danish Population

在线全文

学校读者我要写书评

暂无评论

Journal of Biomedical Science and engineering 2020年第12期13卷 235-253页

作者： else Marie Bartels Waqas Ahmed Jack Kvistgaard Olsen eva Littrup Andersen bente Danneskiold-Samsøe Lars-erik Kristensen Henning Bliddal Cecilie Rødgaard Bartholdy Adrian P. Harrison The Parker Institute Copenhagen University Hospital Bispebjerg and Frederiksberg Denmark Department of Neurology Copenhagen University Hospital Bispebjerg and Frederiksberg Denmark Department of Veterinary and Animal Sciences Faculty of Health Science University of Copenhagen Copenhagen Denmark

Isokinetic and isometric force measurements involving a dynamometer setup are widely used in training and in muscle assessment. For further understanding of the method, we investigated the activation of key functional muscles during isokinetic and isometric movements. During force measurements in an isokinetic Biodex System 3 ProTM, acoustic myography (AMG) was applied. Ten healthy subjects (5 men/5 women) in each decade from 20 to 69 years of age participated in the study. Measurements were carried out during extension and flexion of the ankle, knee and elbow joints. Muscle fibre use was measured by efficiency (e-score) and fibre recruitment (temporal (T-score) and spatial (S-score) summation). AMG measurements showed good reproducibility, and the recruitment pattern of muscle fibres did not change with gender or age. Overall, a significantly higher e-score (P e lower angular velocities than at the higher ones, indicating a lower level of muscle efficiency at higher velocities. Muscles used for knee movement exhibited higher scores than muscles associated with the ankle and elbow joints, most likely related to the greater degree of force production at this joint compared to the ankle and elbow. The ability to activate and inactivate muscle fibres during periods of isokinetic activity becomes increasingly more difficult as the velocity increases. When assessing training effects in sports or rehabilitation, AMG in parallel with isokinetic measurements adds important additional information by giving a measure of possible improvements in efficiency and fibre use.

关键词： Muscle Strength Acoustic Myography Range of Motion Muscle Fibre Use

InP photonic circuits using generic integration [Invited]

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Photonics Research 2015年第5期3卷 60-68页

作者： K.A.Williams e.A.J.M.bente D.Heiss Y.Jiao K.Lawniczuk X.J.M.Leijtens J.J.G.M.van derTol M.K.Smit COBRA Research Institute Eindhoven University of Technology

InP integrated photonics has become a critical enabler for modern telecommunications, and is poised to revolutionize data communications, precision metrology, spectrometry, and imaging. The possibility to integrate high-performance amplifiers, lasers, modulators, and detectors in combination with interferometers within one chip is enabling game-changing performance advances, energy savings, and cost reductions. Generic integration accelerates progress through the separation of applications from a common technology development. In this paper, we review the current status in In P integrated photonics and the efforts to integrate the next generation of high-performance functionality on a common substrate using the generic methodology.

关键词： mode Invited InP photonic circuits using generic integration