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Application of Clausius-Clappeyron Relation (1832) and Carnot Principle (1824) to Earth’s Atmosphere Tricellular Circulation 被引量:4
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作者 Mbane Biouele César 《Atmospheric and Climate Sciences》 2014年第1期1-6,共6页
Atmospheric or climate phenomena are usually a combination of elementary events whose scales range from the very small (microscopic) to the infinitely large (synoptic). This means that build reasoning from ground- or ... Atmospheric or climate phenomena are usually a combination of elementary events whose scales range from the very small (microscopic) to the infinitely large (synoptic). This means that build reasoning from ground- or space-based observations only, regardless of the physics of elementary processes, inevitably leads to erroneous results. Given the fact that plots of Troposphere Tricellular Circulation are only based on weather mean conditions measured near the ground (i.e.: pressure and winds fields observed at the surface of the earth), we want to improve these representations of the general circulation of the atmosphere, by using both Clausius-Clapeyron Relation and Carnot Principle derived respectively in 1832 and 1824. Indeed, Clausius-Clapeyron relation shows precisely that, unlike the dry water vapor that can be assimilated to the ideal gas at many circumstances, the saturated water vapor has, in an air parcel at the same time cold (temperature below 0.0098°C) and rich in moisture (vapor pressure above 6.11 mb), thermoelastic properties diametrically opposed to those of ideal gas (including dry water vapor). Vertical profiles of temperature and water vapor in the atmosphere provided by ground- or space-based observations lead to the location of a troposphere region in which the ideal gas assumption should be banned: hence appropriate and unique plot of earth’s atmosphere tricellular circulation. 展开更多
关键词 Combination of ELEMENTARY Events Ground- or SPACE-BASED Observations Earth’s ATMOSPHERE tricellular CIRCULATION
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高甘油三酯血症对大鼠急性胰腺炎模型中胰腺导管上皮细胞间紧密连接的影响研究 被引量:2
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作者 吴青 王洁 +5 位作者 谢金莲 杨慧莹 覃颖颖 韦碧薇 梁志海 覃蒙斌 《胃肠病学和肝病学杂志》 CAS 2022年第1期90-94,共5页
目的研究高甘油三酯血症(hypertriglyceridemia,HTG)对大鼠急性胰腺炎(acute pancreatitis,AP)模型胰腺组织细胞间紧密连接(tight junctions,TJs)的影响。方法48只4周龄雄性SD大鼠随机分成普通饲养组(24只)和高脂饲养组(24只),4周后普... 目的研究高甘油三酯血症(hypertriglyceridemia,HTG)对大鼠急性胰腺炎(acute pancreatitis,AP)模型胰腺组织细胞间紧密连接(tight junctions,TJs)的影响。方法48只4周龄雄性SD大鼠随机分成普通饲养组(24只)和高脂饲养组(24只),4周后普通饲养组随机分为C组和AP组,高脂饲养组随机分为HTG组和高甘油三酯血症急性胰腺炎(HTGP)组。AP组和HTGP组经腹腔注射雨蛙肽建立AP模型,C组和HTG组经腹腔注射同等剂量的生理盐水,分别于造模24 h、48 h处置大鼠,采用HE染色法观察胰腺病理改变,免疫组织化学法检测胰腺组织中TJs蛋白脂解刺激脂蛋白受体(LSR)、Tricellulin蛋白(TRIC)、ZO-1、occludin、claudin-7定位及表达,透射电镜观察胰腺导管上皮细胞间TJs变化情况。结果高脂饲养组的大鼠血清甘油三酯(triglyceride,TG)较普通饲养组明显升高(P<0.05);HTG组胰腺组织病理评分高于C组(P<0.05),相同时点HTGP组胰腺组织病理评分高于AP组,但差异无统计学意义(P>0.05);HTG组LSR、TRIC表达显著低于C组(P<0.05),AP组和HTGP组的24 h时点LSR、TRIC、occludin、claudin-7表达均低于相应对照组(P<0.05),HTGP组24 h时点LSR和TRIC的表达显著低于AP组的对应时点(P<0.05);透射电镜观察AP组和HTGP组的24 h时点,发现主胰管上皮细胞TJs较C组和HTG组减少、细胞间隙增宽,且HTGP组比AP组的细胞间隙增宽更明显。结论TJs蛋白LSR、TRIC、ZO-1、occludin、claudin-7在HTG及HTGP大鼠胰腺组织中表达较非高脂模型下降,其中以三细胞间紧密连接(tricellular tight junctions,tTJs)蛋白LSR及TRIC下降明显,提示HTG可能减弱胰腺组织的tTJs,进而加重胰腺组织损伤。 展开更多
关键词 急性胰腺炎 高甘油三酯血症 三细胞间紧密连接 脂解刺激脂蛋白受体
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浅议“三圈环流”自制教具在地理教学中的应用 被引量:1
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作者 练红兰 《热带地貌》 2019年第1期47-49,70,共4页
在新课改背景下,地理教学越来越重视地理知识的形象化、具体化。对于某些学生较难理解的抽象知识,教师单靠语言描述与画图已经满足不了日常教学需求,必须寻找一些辅助工具帮助学生更好地认知、理解。而一些简单易制作的教具可以作为教... 在新课改背景下,地理教学越来越重视地理知识的形象化、具体化。对于某些学生较难理解的抽象知识,教师单靠语言描述与画图已经满足不了日常教学需求,必须寻找一些辅助工具帮助学生更好地认知、理解。而一些简单易制作的教具可以作为教学资源来激发学生的兴趣,帮助学生更好地理解,突破教学难点,同时也为培养学生解决难点和探索学习的能力起到重要的推动作用。本文从自制地理教具角度出发,结合"三圈环流"这一教学难点作了适当地探索和阐述。 展开更多
关键词 自制教具 三圈环流 地理教学
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