检索结果-南通市图书馆

TWO NEW SPECIES OF THE GENUS ANTHENOIDES(ECHINODERmATA: ASTEROIDEA) FROmSOUTHERN CHINA

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Oceanology and Limnology 1989年第1期7卷 37-42,95-96页

作者：廖玉麟 Ailsa m.clark Institute of Oceanology Academia Sinica Qingdao British museum (Natural History) London SW7 5BD

Two new species of the genus Anthenoides from the southern China are described. A. laevigatus sp. nov. shows affinities with A. epixanthus. A. tenuis sp. nov. is related to A. cristatus (Sladen).

关键词： tenuis granules spherical distal slender fauna southeastern outer triangular mostly

The Shishugou Fauna of the middle-Late Jurassic Transition Period in the Junggar Basin of Western China

在线全文

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2022年第4期96卷 1115-1135页

作者： XU Xing James m.clark David A.EBERTH Philip J.CURRIE Centre for Vertebrate Evolutionary Biology Yunnan UniversityKunming 650500China Key Laboratory of Vertebrate Evolution and Human Origins Institute of Vertebrate Paleontology and PaleoanthropologyChinese Academy of SciencesBeijing 100044China Department of Biological Sciences George Washington UniversityWashington DC20052USA Royal Tyrrell museum of Palaeontology Box 7500DrumhellerAlberta T0J 0Y0Canada Department of Biological Sciences University of Alberta 116 Street and 85 AvenueEdmontonAB T6G 2R3Canada

The middle-Late Jurassic transition period is a critical period for the evolution of terrestrial vertebrates,but the global fossil record from this time is relatively *** Shishugou Fauna of this period has recently produced significant fossil remains of dinosaurs and other vertebrate groups,some representing the earliest known members of several dinosaurian groups and other vertebrate groups and some representing the best-known specimens of their *** discoveries are significant for our understanding of the origin and evolution of several vertebrate *** dating indicates that the fauna is aged approximately 159-164 *** with other similarly-aged terrestrial faunas such as Shaximiao and Yanliao show both taxonomic similarities and differences between these faunas and indicate that the Junggar deposits might have preserved the most complete vertebrate fossil record for a middle-Late Jurassic Laurasian terrestrial fauna.

关键词： middle-Late Jurassic Shishugou Fauna Shishugou Formation terrestrial ecosystem Shaximiao Yanliao Junggar Basin

Nonalcoholic fatty liver disease and type 2 diabetes: a burgeoning problem with unclear solutions

在线全文

学校读者我要写书评

暂无评论

Hepatobiliary Surgery and Nutrition 2020年第4期9卷 514-517页

作者： mariana Lazo Jeanne m.clark Division of General Internal medicine School of MedicineJohns Hopkins UniversityBaltimoreMDUSA Division of Gastroenterology&Hepatology Johns Hopkins University School of MedicineBaltimoreMDUSA

The association between chronic liver disease and diabetes has been known for long time,with reports in the literature as early as in 1952(1).Currently,a bidirectional association between type 2 diabetes and nonalcoholic fatty liver disease(NAFLD)has become more widely accepted,probably as a result of the common risk factors(e.g.,obesity)and pathophysiology(e.g.,insulin resistance)(2).

关键词： diabetes liver NAFLD

新疆准噶尔盆地侏罗纪石树沟组上部一大型兽脚类跖骨

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

古脊椎动物学报 2013年第1期51卷 29-42页

作者：贺一鸣 James m.clark 徐星中国科学院古脊椎动物与古人类研究所中国科学院脊椎动物演化与人类起源重点实验室北京100044 美国乔治·华盛顿大学生物学系华盛顿特区20052 中国科学院大学北京100049

准噶尔盆地中侏罗世晚期到晚侏罗世早期沉积的石树沟组产出过包括多种兽脚类恐龙在内的大量脊椎动物化石。描述了一件新的采自准噶尔盆地东北缘五彩湾地区石树沟组上部的兽脚类恐龙左第四跖骨标本(IVPPV18060)。通过与其他兽脚类恐龙第... 详细信息

准噶尔盆地中侏罗世晚期到晚侏罗世早期沉积的石树沟组产出过包括多种兽脚类恐龙在内的大量脊椎动物化石。描述了一件新的采自准噶尔盆地东北缘五彩湾地区石树沟组上部的兽脚类恐龙左第四跖骨标本(IVPPV18060)。通过与其他兽脚类恐龙第四跖骨对比,该标本可归入异特龙超科(Allosauroidea)。它与其他异特龙超科第四跖骨的相似性包括:近端关节面三角形并有一向后方延伸的舌状突出,向外侧轻微弯曲的骨干,位于骨干后方靠近外侧边的半月形肌肉凹陷,三角形骨干横截面。在异特龙超科当中,V18060与准噶尔盆地将军庙地区石树沟组中发现的董氏中华盗龙(Sinraptordongi)最为相似(除了以上相似性,V18060和董氏中华盗龙的相似性还包括远端关节轮廓呈近梯形,骨干后部肌肉凹陷与周围边界呈半开放状态)。但是,V18060和董氏中华盗龙也存在着一些明显的区别:V18060明显比董氏中华盗龙的第四跖骨粗壮,远端内外两髁大小差异相反。这些形态差异可能是由于个体发育或者性双形造成的,也可能代表分类学差异。对比研究和基于第四跖骨形态信息进行的分支系统学分析结果更偏向后一种解释:V18060代表一个不同于董氏中华盗龙但与后者亲缘关系很近的新的兽脚类恐龙。新材料的发现增加了中晚侏罗世石树沟动物群兽脚类恐龙的分异度。在五彩湾和将军庙地区发现不同的中华盗龙类恐龙指示了晚侏罗世早期准噶尔盆地中相邻地区可能存在着一定的生态分异性或者地理隔离。

关键词：准噶尔盆地中晚侏罗世石树沟组兽脚类恐龙跖骨

在线全文

学校读者我要写书评

暂无评论

幼猫鼓阶内慢性电刺激生理学研究

中国医学科学院学报 1992年第6期14卷 402-407页

作者：倪道凤 Robert K shepherd 许时昂 graeme m.clark 中国医学科学院协和医院澳大利亚墨尔本大学

本实验用6只生后2个月的幼猫植入鼓阶电极行慢性电刺激以探讨电听觉的生理学特征。观察到:(1)安全范围内的慢性电刺激对幼猫听力无者害的影响,亦未影响脑干听觉通路对声、电刺激产生的冲动的传递过程;(2)除Ⅰ波被刺激伪迹掩盖外,EABR波... 详细信息

本实验用6只生后2个月的幼猫植入鼓阶电极行慢性电刺激以探讨电听觉的生理学特征。观察到:(1)安全范围内的慢性电刺激对幼猫听力无者害的影响,亦未影响脑干听觉通路对声、电刺激产生的冲动的传递过程;(2)除Ⅰ波被刺激伪迹掩盖外,EABR波形与ABR相似,但前者各波潜伏期随强度改变小,绝对潜伏期比ABR短约1.5ms,波间间期也有意义地缩短;(3)EABR输入——输出曲线电刺激后比电刺激前明显左移。

关键词：人工耳蜗电刺激听性脑干反应

Effect of Ca:mg ratio and high ammoniacal nitrogen on characteristics of struvite precipitated from waste activated sludge digester effluent

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2019年第12期31卷 65-77页

作者： Chathurani moragaspitiya Jay Rajapakse graeme J.millar Science and Engineering Faculty Queensland University of Technology (QUT)

This study revealed the relationship between the presence of calcium impurities and ammoniacal nitrogen concentration upon crystallization of *** research hypothesis was that the presence of both calcium and high concentrations of ammoniacal nitrogen(328–1000 mg/L)in waste activated sludge may influence the struvite quality and acid ***,we studied the impact of Ca:mg ratio upon morphology,particle size,purity and dissolution of struvite,in the presence of varying levels of excess ammoniacal nitrogen.X-ray diffraction revealed that up to 31.4%amorphous material was made which was assigned to *** the ammoniacal nitrogen concentration and elevation of the mg:Ca ratio maximized the presence of *** particle size was also increased by ammoniacal nitrogen as was twinning of the *** with dilute solutions of organic acid revealed the sensitivity of struvite dissolution to the physical characteristics of the *** particles(21.2μm)dissolved at higher rates than larger particles(35.86μm).However,struvite dissolved rapidly as the p H was further reduced irrespective of the physical ***,addition of struvite to low p H soils was not viewed as beneficial in terms of controlled nutrient ***,this study revealed that waste activated sludge effluent with high ammoniacal nitrogen was prospective for synthesis of high quality struvite material.

关键词： Struvite Purity Calcium Ammoniacal nitrogen Waste activated sludge

在线全文

学校读者我要写书评

暂无评论

老年人糖尿病的特殊考量（英文）

老年人糖尿病的特殊考量（英文）

第三届江浙沪三地老年医学高峰论坛暨2012年浙江省老年医学学术年会

作者： Charles m.clark 美国印第安纳大学

Special thanks to Carolyn Jennings,mPH,RD,CDE SouthEast michigan Diabetes Outreach Network whose slides have been adapted for this presentation

关键词：

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

蜗外电刺激实验研究

中华耳鼻咽喉头颈外科杂志 1992年第5期27卷 261-264+318页

作者：倪道凤 Robert K Shepherd graeme m.clark 北京协和医院耳鼻咽喉科澳大利亚墨尔本大学耳鼻咽喉科

采用正常听力成年猫2只、幼猫4只作蜗外电刺激实验研究。用双相平衡、脉宽100μs、几何密度1:11～5.73μC/cm~2geom·per phase的电脉冲行圆窗或鼓岬电刺激达1276～1526小时,术前测试短声诱发的听性脑干反应(ABR),术后一周及电刺激期间... 详细信息

采用正常听力成年猫2只、幼猫4只作蜗外电刺激实验研究。用双相平衡、脉宽100μs、几何密度1:11～5.73μC/cm~2geom·per phase的电脉冲行圆窗或鼓岬电刺激达1276～1526小时,术前测试短声诱发的听性脑干反应(ABR),术后一周及电刺激期间每二周测ABR和电诱发听性脑干反应(EABR)。发现:①作圆窗电刺激是可行的,动物生后头颅骨的生长并未影响电极的固定,圆窗电极植入引起的听力损失比植入鼓阶电极小得多,刺激侧和对照侧听力损失和恢复的过程相似。②圆窗电刺激诱发的EABR主要是由听觉系统产生的,但其短潜伏期反应部分是由前庭系统产生的。③在某一刺激强度以上圆窗电刺激诱发的EABR被面神经反应污染,在慢性电刺激开始的7周内面神经反应阈逐渐降低,最后稳定在某一水平,茎乳孔注射2%利多卡因可抑制此反应。④电刺激前经鼓岬表面电刺激未记录到具备EABR形态的反应,可能是伪迹,电刺激2个月后可记录到EABR,但可被白噪声掩蔽,可能是电声效应。可见蜗外电刺激还有不少问题需要进一步研究。

关键词：听力测验法,诱发反应(Audiometry,evoked response) 耳蜗植入术(Cochlear implant)

The Yin and Yang of Wnt/Ryk axon guidance in development and regeneration

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China(Life Sciences) 2014年第4期57卷 366-371页

作者： clark Charlotte EJ LIU Yaobo COOPER Helen m Queensland Brain Institute The University of QueenslandBrisbane Institute of Neuroscience Soochow University

In the developing embryo,nascent axons navigate towards their specific targets to establish the intricate network of axonal connections linking neurons within the mature nervous *** navigational systems comprising repulsive and attractive guidance cues form chemotactic gradients along the pathway of the exploring growth ***-bound receptors detect these gradients and determine the trajectory of the migrating growth *** contrast to their benevolent role in the developing nervous system,repulsive guidance receptors are detrimental to the axon’s ability to regenerate after injury in the *** this review we explore the essential and beneficial role played by the chemorepulsive Wnt receptor,Ryk/Derailed in axon navigation in the embryonic nervous system(the Yin function).Specifically,we focus on the role of Wnt5a/Rykmediated guidance in the establishment of two major axon tracts in the mammalian central nervous system,the corticospinal tract and the corpus *** studies have also identified Ryk as a major suppressor of axonal regeneration after spinal cord ***,we also discuss this opposing aspect of Ryk function in axonal regeneration where its activity is a major impediment to axon regrowth(the Yang function).

关键词： Ryk Derailed Wnt Wnt signalling axon guidance axonal regeneration spinal cord injury