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Current Zoology 1983年第3期 223-226页

作者：马淑亭张树林李相印刘如臻中国科学院微生物所电镜室中国科学院生物物理研究所河北新医大电镜室

关于脊椎动物眼睛晶状体纤维细胞的研究,已有不少报道,但涉及到其细胞表面结构的有关工作还不多。至于不同部位细胞的结构,特别是晶状体核纤维细胞的构形,报道也不完全一致。本文主要介绍用常规扫描电镜以及冰冻断裂扫描电镜技术,研究... 详细信息

关于脊椎动物眼睛晶状体纤维细胞的研究,已有不少报道,但涉及到其细胞表面结构的有关工作还不多。至于不同部位细胞的结构,特别是晶状体核纤维细胞的构形,报道也不完全一致。本文主要介绍用常规扫描电镜以及冰冻断裂扫描电镜技术,研究家兔晶状体纤维细胞的三维结构。Hansson(1970);Sakuragawa和Kuwabara(1975);Nelson和Rafferty(1976)均以小自鼠为材料。Farnsworth(1974)以及Sakuragawa(1975)分别用大白鼠为研究对象。他们先后开展了晶状体的扫描电镜研究,并对该课题的发展作出了一定贡献。Dickson和Crock(1972;1975)将冰冻断裂扫描电镜技术引入对猴晶状体

关键词： Freeze-frocfure scanning electron microscopy lens fiber cell boll-and-socket. junction.

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一种助发泡剂的鉴定

一种助发泡剂的鉴定

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中国质谱学会第七届会员代表大会暨学术报告会

作者：何文绚 Robert Shanks 福建省分析测试技术研究所 Department of Applied Chemistry RMIT UniversityMelbourneVic.3001Australia

AC发泡剂是世界上产耗量最大、改性品种最多的发泡剂。由于受到成本、效能等因素的制约,开发替代AC的新产品十分困难,而且不同产品有不同的加工最佳条件,事实上不可能使用同一结构的发泡剂满足所有加工要求。通过加入各种助剂或与其他... 详细信息

AC发泡剂是世界上产耗量最大、改性品种最多的发泡剂。由于受到成本、效能等因素的制约,开发替代AC的新产品十分困难,而且不同产品有不同的加工最佳条件,事实上不可能使用同一结构的发泡剂满足所有加工要求。通过加入各种助剂或与其他发泡剂复配对AC发泡剂进行改性的方法,越来越成为研究开发人员关心的重点。因此,对各种特殊性能产品的剖析能为缩短研究周期,拓展开发人员研究思路提供一条十分便捷的途径。

关键词： blowing agent FTIR microscopy gas chromatography-mass spectrometry (GC/MS) TLC

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中国西南木质文物的微观研究及加固处理

中国西南木质文物的微观研究及加固处理

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北京粘接学会第二十三届学术年会暨粘接剂、密封剂技术发展研讨会

作者：邱坚伍建玲罗蓓 Monlin Kuo 西南林业大学爱荷华州立大学

Thousands of waterlogged wood pillars beneath crop fields were discovered during the2008 excavation of a 3,000 years archaeological site in Southwestern *** segment of wood pillarwas sampled in 2009 for *** were studied with scanning and transmission electron microscopes,and 2.5 cm x 2.5 cm x 5 cm(length) specimens were dehydrated with methanol,followed bytreatment with low-molecular-weight neutral phenol-formaldehyde *** wood,identified to hePinuskesiya ***(***.) Gaussen,was severely degraded by bacterial surface erosion and tunneling of cell *** tunneling was more frequently observed near the cell corners with thick *** degradation of cell walls was accompanied by accumulation of degradation products and bacterial slime in cell *** brown-rot nor soft-rot decay was detected in the *** fungi were found in rays and in adjacent tracheids,which are believed to be pre-existing prior to *** wood sample gradually darkened after sampling,but removal of bacterial degradation products with methanol and a brief 2%oxalic acid treatment reversed the *** average specific gravity and crushing strength of the waterlogged wood were 0.245 and 7.14 MPa,compared to 0.370 and 33.65 MPa of normal wood of the same *** of the waterlogged wood with neutral PF resin increased specific gravity to 0.435 and crushing strength to 12.75 *** PF treatment minimized shrinkage and warping and stabilized wood color of the waterlogged *** the PF treatment is not reversible,the treated wood remains porous to allow retreatment.

关键词： Waterlogged wood bacterial degradation microscopy phenol-formaldehyde discoloration

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A Study on Microstructural and Mechanical Properties of a Stir Cast Al(SiC-Mg-TiFe)Composite

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Fluid Dynamics & Materials Processing 2019年第1期15卷 15-26页

作者： Samuel Olukayode Akinwamide Serge Mudinga Lemika Babatunde Abiodun Obadele Ojo Jeremiah Akinribide Bolanle Tolulope Abe Peter Apata Olubambi Centre for Nanomechanics and Tribocorrosion University of JohannesburgJohannesburg 2028South Africa Department of Electrical and Electronics Engineering Tshwane University of TechnologyPretoria 0182South Africa Department of Chemical Material and Chemical EngineeringBotswana International University of Science and TechnologyPalapyeBotswana

Development of metal matrix composite is becoming widespread in most engineering applications where excellent mechanical properties are *** and microstructural properties of aluminium reinforced with silicon carbide was *** of aluminium was melted in a furnace at temperature ranging between 650-700℃.Ferrotitanium and silicon carbide were preheated in a muffle furnace before addition to molten aluminium in a crucible *** proportions of magnesium,ferrotitanium and varying proportions of silicon carbide were utilized as *** was carried out manually for a minimum of 10 mins after the addition of each weight percent of silicon *** as-cast samples were sectioned for various mechanical and microstructural *** studies from optical microscopy and scanning electron microscopy(SEM)showed the dispersion of reinforcements in the aluminium *** properties which includes hardness and tensile strength of fabricated composites were observed to increase,while XRD analysis showed various phases formed from reaction between the matrix and reinforcements.

关键词： Aluminium ferrotitanium silicon carbide microscopy

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Trichoscopy: Essentials for the dermatologist

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World Journal of Dermatology 2015年第2期4卷 63-68页

作者： Juan Antonio Moreno Romero Ramon Grimalt Department of Dermatology Hospital General de Catalunya Universitat Internacional de Catalunya

Noninvasive in vivo imaging techniques have become an important diagnostic aid for dermatology. Dermoscopy, also known as dermatoscopy, has been shown to increase the clinician's diagnostic accuracy when evaluating cutaneous neoplasms. Dermoscope, both hand-held and videodermoscope, are nowadays a basic instrument for almost all the dermatologists around the world. Trichoscopy is the term coined for dermoscopic imaging of the scalp and hair. Routinely using dermoscopy and recognizing the structures and patterns of the different types of alopecia will likely improve the observer's sensitivity for diagnosis and followup of hair and scalp disorders. Structures which may be visualized by trichoscopy include hair shafts of different types, the number of hairs in one pilosebaceous unit, hair follicle openings(dots), the peri and interfollicular areas and the vasculature. This review summarizes the current knowledge about trichoscopic findings which may aid in the diagnosis of alopecia. Besides diagnosing alopecia, it has the potential for obviating unnecessary biopsies and when a biopsy is still needed it is helpful in choosing an ideal biopsy site. Moreover, trichoscopy can be a valuable tool for evaluating the treatment response photographically at each follow-up. Finally, we have discussed the utility of dermoscopy in inflammatory scalp disorders and infections.

关键词： Alopecia Dermatosis Scalp Dermoscopy Dermatoscopy Epiluminiscence microscopy Diagnosis

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