Applied Microscopy最新文献_第3页

EPMA quantification on the chemical composition of retained austenite in a Fe-Mn-Si-C-based multi-phase steel fe - mn - si - c基多相钢残余奥氏体化学成分的EPMA定量分析

Applied Microscopy Pub Date : 2022-12-20 DOI: 10.1186/s42649-022-00083-0

Yoon-Uk Heo, Chang-Gon Jeong, Soo-Hyun Kim, Gun-Young Yoon, T. T. T. Trang, Youngyun Woo, Eun Yoo Yoon, Young-Seon Lee

引用次数: 1

Histological study on the skin structure in two mudskippers, Periophthalmus waltoni and Boleophthalmus dussumieri in relation to their terrestrial life 两种弹涂鱼，waltoni眼周和Boleophthalmus dussumieri皮肤结构与陆地生活关系的组织学研究

Applied Microscopy Pub Date : 2022-12-16 DOI: 10.1186/s42649-022-00081-2

Mehran Dorostghoal, Ashraf Jazayeri, Sara Ashiri

{"title":"Histological study on the skin structure in two mudskippers, Periophthalmus waltoni and Boleophthalmus dussumieri in relation to their terrestrial life","authors":"Mehran Dorostghoal, Ashraf Jazayeri, Sara Ashiri","doi":"10.1186/s42649-022-00081-2","DOIUrl":"10.1186/s42649-022-00081-2","url":null,"abstract":"<div>Microscopic structure of skin in two amphibious mudskipper fish; Boleophthalmus dussumieri Valenciennes, 1837 (B. dussumeri) and Periophthalmus waltoni Koumans, 1941 (P. waltoni) were investigated in relation to their lifestyle. The general structure of skin is the same among the two species. Epidermis in B. dussumeri was thicker significantly than P. waltoni. The dermal bulges were only well developed in the skin of B. dussumeri. Mucous cells were absent in the epidermis of P. waltoni but present in B. dussumeri. Both B. dussumeri and P. waltoni have well-developed swollen middle cells as a shared epidermal feature. The thickness of the middle cell layer of the epidermis in B. dussumeri was significantly greater than in P. waltoni. Capillaries in the dorsal and ventral parts of the body are more closely distributed to the epidermal surface in P. waltoni than in B. dussumeri. The diffusion distance in the dorsal epidermis of P. waltoni was less than that in the ventral epidermis of B. dussumeri. A comparative examination of the skin of mudskipper species suggests that, due to the more terrestrial lifestyle adopted by P. waltoni, the skin contributes more to respiration.</div>","PeriodicalId":470,"journal":{"name":"Applied Microscopy","volume":"52 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9756237/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10748758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Analysis of composition and microstructure of diatom frustules in mud on the coast of Boryeong- city, South Korea 韩国保宁市海岸泥中硅藻体的组成和微观结构分析

Applied Microscopy Pub Date : 2022-12-15 DOI: 10.1186/s42649-022-00082-1

Mi Kyung Bok, Chung Hwa Chin, Hee Jung Choi, Ju Hyun Ham, Byung Soo Chang

引用次数: 0

Poxvirus under the eyes of electron microscope 电镜下痘病毒

Applied Microscopy Pub Date : 2022-11-14 DOI: 10.1186/s42649-022-00080-3

Jaekyung Hyun

引用次数: 3

Microstructural, mechanical, and electrochemical analysis of carbon doped AISI carbon steels 碳掺杂AISI碳钢的显微结构、力学和电化学分析

Applied Microscopy Pub Date : 2022-10-20 DOI: 10.1186/s42649-022-00079-w

Muhammad Ishtiaq, Aqil Inam, Saurabh Tiwari, Jae Bok Seol

{"title":"Microstructural, mechanical, and electrochemical analysis of carbon doped AISI carbon steels","authors":"Muhammad Ishtiaq, Aqil Inam, Saurabh Tiwari, Jae Bok Seol","doi":"10.1186/s42649-022-00079-w","DOIUrl":"10.1186/s42649-022-00079-w","url":null,"abstract":"<div>The effect of carbon doping contents on the microstructure, hardness, and corrosion properties of heat-treated AISI steel grades of plain carbon steel was investigated in this study. Various microstructures including coarse ferrite-pearlite, fine ferrite-pearlite, martensite, and bainite were developed by different heat treatments i.e. annealing, normalizing, quenching, and austempering, respectively. The developed microstructures, micro-hardness, and corrosion properties were investigated by a light optical microscope, scanning electron microscope, electromechanical (Vickers Hardness tester), and electrochemical (Gamry Potentiostat) equipment, respectively. The highest corrosion rates were observed in bainitic microstructures (2.68–12.12 mpy), whereas the lowest were found in the fine ferritic-pearlitic microstructures (1.57–6.36 mpy). A direct correlation has been observed between carbon concentration and corrosion rate, i.e. carbon content resulted in an increase in corrosion rate (2.37 mpy for AISI 1020 to 9.67 mpy for AISI 1050 in annealed condition).</div>","PeriodicalId":470,"journal":{"name":"Applied Microscopy","volume":"52 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9583967/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40657667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Review on the structural understanding of the 10S myosin II in the era of Cryo-electron microscopy 低温电镜时代对10S肌球蛋白II的结构认识综述

Applied Microscopy Pub Date : 2022-10-11 DOI: 10.1186/s42649-022-00078-x

Anahita Vispi Bharda, Hyun Suk Jung

引用次数: 0

Histology and morphometry of the skin of the trident goby Tridentiger brevispinis (Perciformes, Gobiidae) 三叉戟虾虎鱼(虾虎鱼科，虾虎鱼目)皮肤的组织学和形态学研究

Applied Microscopy Pub Date : 2022-08-09 DOI: 10.1186/s42649-022-00077-y

Hyun-Tae Kim

引用次数: 2

In-situ formation of co particles encapsulated by graphene layers 由石墨烯层封装的co颗粒的原位形成

Applied Microscopy Pub Date : 2022-07-14 DOI: 10.1186/s42649-022-00076-z

Minjeong Lee, Gyutae Kim, Gyu Hyun Jeong, Aram Yoon, Zonghoon Lee, Gyeong Hee Ryu

{"title":"In-situ formation of co particles encapsulated by graphene layers","authors":"Minjeong Lee, Gyutae Kim, Gyu Hyun Jeong, Aram Yoon, Zonghoon Lee, Gyeong Hee Ryu","doi":"10.1186/s42649-022-00076-z","DOIUrl":"10.1186/s42649-022-00076-z","url":null,"abstract":"<div>The process of encapsulating cobalt nanoparticles using a graphene layer is mainly direct pyrolysis. The encapsulation structure of hybrids prepared in this way improves the catalyst stability, which greatly reduces the leaching of non-metals and prevents metal nanoparticles from growing beyond a certain size. In this study, cobalt particles surrounded by graphene layers were formed by increasing the temperature in a transmission electron microscope, and they were analyzed using scanning transmission electron microscopy (STEM). Synthesized cobalt hydroxide nanosheets were used to obtain cobalt particles using an in-situ heating holder inside a TEM column. The cobalt nanoparticles are surrounded by layers of graphene, and the number of layers increases as the temperature increases. The interlayer spacing of the graphene layers was also investigated using atomic imaging. The success achieved in the encapsulation of metallic nanoparticles in graphene layers paves the way for the design of highly active and reusable heterogeneous catalysts for more challenging molecules.</div>","PeriodicalId":470,"journal":{"name":"Applied Microscopy","volume":"52 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9279520/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40588010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Light and electron microscopic morphology of the fertilized egg and fertilized egg envelope of Poropanchax normani, Poeciliidae, Teleostei 鲈科normanchax Poropanchax, Poeciliidae, Teleostei受精卵和受精卵包膜的光镜和电镜形态

Applied Microscopy Pub Date : 2022-07-13 DOI: 10.1186/s42649-022-00075-0

Dong Heui Kim

{"title":"Light and electron microscopic morphology of the fertilized egg and fertilized egg envelope of Poropanchax normani, Poeciliidae, Teleostei","authors":"Dong Heui Kim","doi":"10.1186/s42649-022-00075-0","DOIUrl":"10.1186/s42649-022-00075-0","url":null,"abstract":"<div>We examined the morphology of the fertilized egg and the fine structure of fertilized egg envelopes of Poropanchax normani belonging to the family Poeciliidae, also known as Norman’s lampeye using light and electron microscopes. The fertilized eggs with narrow perivitelline space were found to be spherical and demersal, additionally containing small oil droplets in the vitelline membrane. Further, a bundle of adhesive filaments was observed to be present on one side of the fertilized egg. These filaments possessed remarkably high elasticity and were approximately 1-3 mm in length. The size of the fertilized egg was determined to be about 1.49 ± 0.07 mm (n = 30). The outer surface appeared smooth, and adhesive filaments originating at different location of the surface of the envelope were found to be distributed around the egg envelope and were joined together to form a single long bundle in scanning electron microscopic observation. A peak-like structure formed of several straight wrinkles was observed around the micropyle. However, the complete structure of the micropyle could not be studied due to the depth at which it was located. Additionally, the total thickness of the egg envelope was ascertained to be approximately12.5–14.5 μm. The egg envelope consisted of two distinct layers, an outer electron dense layer and an inner lamellar layer, further consisting of 10 sublayers of varying thicknesses. Collectively, it was observed that the morphological characteristics of the fertilized egg, fine structures surrounding the micropyle, outer surface, adhesive structure consisting adhesive filaments, and sections of fertilized egg envelope displayed species specificity.</div>","PeriodicalId":470,"journal":{"name":"Applied Microscopy","volume":"52 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9279538/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40591201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quantitative analysis of retained austenite in Nb added Fe-based alloy 加Nb铁基合金中残余奥氏体的定量分析

Applied Microscopy Pub Date : 2022-06-18 DOI: 10.1186/s42649-022-00074-1

Kwang Kyu Ko, Jin Ho Jang, Saurabh Tiwari, Hyo Ju Bae, Hyo Kyung Sung, Jung Gi Kim, Jae Bok Seol

{"title":"Quantitative analysis of retained austenite in Nb added Fe-based alloy","authors":"Kwang Kyu Ko, Jin Ho Jang, Saurabh Tiwari, Hyo Ju Bae, Hyo Kyung Sung, Jung Gi Kim, Jae Bok Seol","doi":"10.1186/s42649-022-00074-1","DOIUrl":"10.1186/s42649-022-00074-1","url":null,"abstract":"<div>The use of Pipelines for long-distance transportation of crude oil, natural gas and similar applications is increasing and has pivotal importance in recent times. High specific strength plays a crucial role in improving transport efficiency through increased pressure and improved laying efficiency through reduced diameter and weight of line pipes. TRIP-based high-strength and high-ductility alloys comprise a mixture of ferrite, bainite, and retained austenite that provide excellent mechanical properties such as dimensional stability, fatigue strength, and impact toughness. This study performs microstructure analysis using both Nital etching and LePera etching methods. At the time of Nital etching, it is difficult to distinctly observe second phase. However, using LePera etching conditions it is possible to distinctly measure the M/A phase and ferrite matrix. The fraction measurement was done using OM and SEM images which give similar results for the average volume fraction of the phases. Although it is possible to distinguish the M/A phase from the SEM image of the sample subjected to LePera etching. However, using Nital etching is nearly impossible. Nital etching is good at specific phase analysis than LePera etching when using SEM images.</div>","PeriodicalId":470,"journal":{"name":"Applied Microscopy","volume":"52 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9206595/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39986536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2