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目的：观察多不饱和脂肪酸DHA、EPA对于耐力训练小鼠机体能力的影响，包括抗氧化能力及膜流动性的影响。方法：将小鼠随机分组，进行耐力训练后测定血浆和红细胞中脂质过氧化物丙二醛（MDA）的含量，肝脏、心肌、骨骼肌中MDA的含量、SOD及GPX活性及膜流动性的测定。结果：训练结束即刻，训练组MDA含量、SOD活性及肝组织GPX活性显著升高；膜流动性与训练对照组相比增大，与安静对照组相比无统计学差异。训练结束24h．训练组MDA含量、SOD及GPX活性降低。尤其对于加DHA、EPA组，MDA含量下降更为明显，其骨骼肌组织中SOD活性明显高于对照组。训练实验组红细胞膜相对流动系数显著高于其他两组，线粒体膜流动性明显高于训练对照组，相比于安静对照组有升高趋势。结论：较大强度运动训练使机体内自由基生成增多．长期训练可增加机体清除自由基的能力，DHA、EPA有增加组织SOD和GPX活性的趋势。长期较大强度运动训练使红细胞膜及线粒体膜流动性降低，DHA、EPA有很好的拮抗这种损伤作用，对线粒体膜具有很强的保护作用。 相似文献
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Study on arsenic level in public water supply of Delhi using hydride generator accessory coupled with atomic absorption spectrophotometer 总被引：1，自引：0，他引：1
Sanjeev Lalwani T. D. Dogra D. N. Bhardwaj R. K. Sharma O. P. Murty 《Indian journal of clinical biochemistry : IJCB》2006,21(1):70-76
Exposure to arsenic has been associated with several health hazards. Worldwide the main reason for chronic human intoxication
with arsenic is intake of contaminated drinking water. Air acetylene type of atomic absorption spectrophotometer in combination
with hydride generator accessory was used to analyze arsenic level in 25 water samples collected from 25 booster pumping stations
and 313 water samples collected from tap water supply of 62 areas of Delhi. Results were analyzed using SPSS and Barlett’s
Chi Square Test. Mean arsenic level detected in water samples collected from booster pumping stations was 0.00976 ppm (Range
0.000–0.017 ppm, Standard Deviation 0.006 and Standard error of Mean 0.00118). Maximum arsenic level (0.017 ppm) was found
in water samples of booster pumping stations of Mehrauli, Punjabi Bagh and Ramjas Road. Mean arsenic level detected in samples
collected from tap water supply was 0.013 ppm (Range 0–0.0430 ppm, Standard Deviation 0.00911 and Standard error of Mean 0.000515).
In water samples of 42 areas arsenic level detected was exceeding WHO/EPA permissible limit of 0.01 ppm (10 ppb). The mean
arsenic level detected in water samples of booster pumping station was within WHO/EPA permissible limit while mean arsenic
level detected in tap water samples was marginally higher. Mixing of ground water and contamination through broken or leaking
channel could be the possible reason of higher arsenic level in tap water. Continuous monitoring of quality of drinking water
is required particularly in view of water contamination caused by industrial waste and uncontrolled ground water extraction. 相似文献
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美国虽拒签《京都议定书》,但仍积极编制本国的温室气体清单。本文基于对IPCC和EPA温室气体清单方法学的比较研究,并通过对EPA温室气体清单编制的演变过程、流程和特点的系统分析,揭示其内在机制。以期借鉴较为成熟的温室气体清单编制方法,完善我国温室气体排放的核算体系。 相似文献
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工程项目档案是项目建设的产物,也是其验收、运营管理与改扩建的重要依据,具有较强的凭证作用和参考价值。"互联网+"背景下,档案管理向智能化和数字化方向发展。本研究以此为出发点,采用政策分析、文献调查、跨学科研究等方法,将档案学视角与工程管理相结合,探究"互联网+"工程项目档案管理的建设特色,分析其面临的政策完善化、资源共享化、技术智能化和人才多元化机遇以及政策落地不完善、资源共建不充分、技术发展不健全和责任落实不完备的挑战,以期为我国"互联网+"工程项目档案管理发展带来思考。 相似文献
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ω-3系列多不饱和脂肪酸生理功能及其机理 总被引：3，自引：0，他引：3
综述了ω-3系列多不饱和脂肪酸在人体内的代谢途径以及其在大脑和智力发育预防癌症及心脑血管疾病等方面的生理功能,并分析了过量摄入带来的危害. 相似文献
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浅谈EPA和DHA的生理作用 总被引：1，自引：0，他引：1
二十二碳六烯酸(DHA)和二十碳五烯酸(EPA)是人体必需的高度不饱和脂肪酸,它们对人类健康有特殊的作用和影响。DHA和EPA与生命现象密切相关,它们不但在视网膜和大脑的结构膜起重要作用,而且还是二十碳四烯酸(20∶4ω-6)代谢生成花生四烯酸(AA)的调节者。 相似文献
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Considering the increasing use of information technology with established standards, such as TCP/IP and XML in modem industrial automation, we present a high cost performance solution with FPGA （field programmable gate array） implementation of a novel reliable real-time data transfer system based on EPA （Ethemet for plant automation） protocol and IEEE 1588 standard. This combination can provide more predictable and real-time communication between automation equipments and precise synchronization between devices. The designed EPA system has been verified on Xilinx Spartan3 XC3S1500 and it consumed 75% of the total slices. The experimental results show that the novel industrial control system achieves high synchronization precision and provides a 1.59-ps standard deviation between the master device and the slave ones. Such a real-time data transfer system is an excellent candidate for automation equipments which require precise synchronization based on Ethemet at a comparatively low price. 相似文献
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DHA和EPA的生理作用及开发利用研究进展 总被引：20，自引：0，他引：20
二十二碳六烯酸(DHA)和二十碳五烯酸(EPA),两者常混存于食物中,特别是海产鱼类的鱼油中.对人的大脑、心血管、人体免疫力等有特殊的作用和影响.本文综述了DHA、EPA的代谢机理、生理作用及开发利用. 相似文献
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This paper presents a study on mathematical problem solving in third-grade pupils. The relationship between mathematics, metacognition
and intelligence was investigated in children with (n = 191) and without mathematical learning disabilities (n = 268). A significant relationship was found between prediction, evaluation, intelligence, procedural and mathematical fact
retrieval skills in children without mathematical learning disabilities. In the children with mathematical learning disabilities
a relationship was found between metacognitive and procedural skills. No such relationship was found between intelligence
and metacognition or between metacognition and mathematical fact retrieval skills. In addition it was investigated if children
with mathematical learning disabilities had less adequate metacognitive skills than peers without learning problems. At group
level significant differences were found between both groups. However on analyzing these results further, it was found that
four out of five children with combined mathematical learning disabilities, half of the children with procedural disabilities
and only 5% of the children with a retrieval deficiency had low metacognitive skills. Furthermore, metacognitive problems
were found in one out of five children without learning disabilities. Moreover, a majority of the children with mathematical
learning disabilities and inadequate metacognitive skills had problems with prediction and evaluation skills. Most third graders
with low metacognitive skills only appeared to have problems predicting the level of difficulty of tasks. Inaccurate evaluations
were found on a more regular basis in children with mathematical learning disabilities and inadequate metacognitive skills
as opposed to the sample of children with inadequate metacognitive skills but without learning difficulties, where their occurrence
was rather a one off. The implications of this study for diagnosis and treatment will be discussed later in this paper. 相似文献
10.
内标与外标相结合定量,毛细管柱气相色谱分析测定深海鱼精油中EPA．DHA的含量回收率为99．7％－100．51％。变异系数为2．49％－3．65％。 相似文献
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