Journal of Spectral Imaging最新文献_第4页

Comprehensive review on land use/land cover change classification in remote sensing 土地利用/土地覆被变化遥感分类研究综述

Journal of Spectral Imaging Pub Date : 2020-07-31 DOI: 10.1255/jsi.2020.a8

M. Sam Navin, L. Agilandeeswari

引用次数: 16

Thermal imaging as a tool in food analysis 热成像技术在食品分析中的应用

Journal of Spectral Imaging Pub Date : 2020-07-21 DOI: 10.1255/jsi.2020.a7

D. Ferreira

引用次数: 4

A modified Cuckoo Search algorithm based optimal band subset selection approach for hyperspectral image classification 一种改进的基于杜鹃搜索算法的高光谱图像分类最优波段子集选择方法

Journal of Spectral Imaging Pub Date : 2020-06-22 DOI: 10.1255/jsi.2020.a6

S. Sawant, M. Prabukumar, Sathishkumar Samiappan

引用次数: 13

A survey of band selection techniques for hyperspectral image classification 高光谱图像分类的波段选择技术综述

Journal of Spectral Imaging Pub Date : 2020-06-16 DOI: 10.1255/jsi.2020.a5

S. Sawant, M. Prabukumar

引用次数: 26

New insights in osteocyte imaging by synchrotron radiation 同步辐射在骨细胞成像中的新发现

Journal of Spectral Imaging Pub Date : 2020-01-16 DOI: 10.1255/jsi.2020.a3

Hugues Portier, C. Jaffré, C. Kewish, Christine Chappard, S. Pallu

{"title":"New insights in osteocyte imaging by synchrotron radiation","authors":"Hugues Portier, C. Jaffré, C. Kewish, Christine Chappard, S. Pallu","doi":"10.1255/jsi.2020.a3","DOIUrl":"https://doi.org/10.1255/jsi.2020.a3","url":null,"abstract":"Bone health depends on the bone mineral density and mechanical strength, characterised quantitatively and\u0000inferred through qualitative parameters such as the trabecular and cortical micro-architecture, and other parameters\u0000describing the bone cells. Among these cells, the osteocyte has been recognised as the orchestrator of bone remodelling,\u0000playing a key role in directing osteoblastic and osteoclastic activities. Conventional optical and electron microscopies have\u0000greatly improved our understanding of the cell physiology mechanisms involved in different osteoarticular\u0000pathophysiological contexts, especially osteoporosis. More recently, imaging methods exploiting synchrotron radiation,\u0000such as X-ray tomography, ptychography, and deep ultraviolet and Fourier transform infrared spectroscopies, have\u0000revealed new biochemical, chemical and 3D morphological information about the osteocyte lacuna, the surrounding matrix\u0000and the lacuna–canalicular network at spatial length scales spanning microns to tens of nanometres. Here, we review\u0000recent results in osteocyte lacuna and lacuna–canalicular network characterisation by synchrotron radiation imaging in\u0000human and animal models, contributing to new insights in different physiologic and pathophysiological situations.","PeriodicalId":37385,"journal":{"name":"Journal of Spectral Imaging","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44652733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Terahertz spectroscopy and imaging for gastric cancer diagnosis 太赫兹光谱和成像在胃癌诊断中的应用

Journal of Spectral Imaging Pub Date : 2020-01-01 DOI: 10.1255/jsi.2020.a2

F. Wahaia, I. Kašalynas, L. Minkevičius, C. Carvalho Silva, A. Urbanowicz, G. Valušis

引用次数: 10

Unstained blood smear contrast enhancement using spectral time multiplexing super resolution 利用光谱时间复用超分辨率增强未染色的血液涂片对比度

Journal of Spectral Imaging Pub Date : 2020-01-01 DOI: 10.1255/jsi.2020.a1

Marie-Florence A. Yebouet, A. Diby, Kenneth A. Kaduki, J. Zoueu

引用次数: 0

Restoration of defaced serial numbers using lock-in infrared thermography (Part I) 使用锁定红外热像仪恢复损坏的序列号（第一部分）

Journal of Spectral Imaging Pub Date : 2019-11-18 DOI: 10.1255/jsi.2019.a20

I. Unobe, L. Lau, J. Kalivas, R. Rodriguez, A. Sorensen

{"title":"Restoration of defaced serial numbers using lock-in infrared thermography (Part I)","authors":"I. Unobe, L. Lau, J. Kalivas, R. Rodriguez, A. Sorensen","doi":"10.1255/jsi.2019.a20","DOIUrl":"https://doi.org/10.1255/jsi.2019.a20","url":null,"abstract":"Infrared thermal imaging is an evolving approach useful in non-destructive evaluation of materials for industrial and\u0000research purposes. This study investigates the use of this method in combination with multivariate data analysis as an\u0000alternative to chemical etching; a destructive method currently used to recover defaced serial numbers stamped in metal.\u0000This process involves several unique aspects, each of which works to overcome some pertinent challenges associated\u0000with the recovery of defaced serial numbers. Infrared thermal imaging of metal surfaces provides thermal images sensitive\u0000 to local differences in thermal conductivity of regions of plastic strain existing below a stamped number. These strains are\u0000 created from stamping pressures distorting the atomic crystalline structure of the metal and extend to depths beneath the\u0000stamped number. These thermal differences are quite small and thus not readily visible from the raw thermal images of an\u0000irregular surface created by removing the stamped numbers. As such, further enhancement is usually needed to identify\u0000the subtle variations. The multivariate data analysis method, principal component analysis, is used to enhance these subtle\u0000variations and aid the recovery of the serial numbers. Multiple similarity measures are utilised to match recovered numbers\u0000to several numerical libraries, followed by application of various fusion rules to achieve consensus identification.","PeriodicalId":37385,"journal":{"name":"Journal of Spectral Imaging","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42020422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Spatial distribution of starch, proteins and lipids in maize endosperm probed by scanning transmission X-ray microscopy 扫描透射X射线显微术探测玉米胚乳中淀粉、蛋白质和脂质的空间分布

Journal of Spectral Imaging Pub Date : 2019-11-13 DOI: 10.1255/jsi.2019.a21

C. Rivard, B. Bakan, C. Boulogne, K. Elmorjani, S. Swaraj, R. Belkhou, D. Marion

引用次数: 1

Impact of the influenza protein PB1-F2 on the biochemical composition of human epithelial cells revealed by synchrotron Fourier transform infrared spectromicroscopy 同步辐射傅立叶变换红外光谱显微镜研究流感蛋白PB1-F2对人上皮细胞生化成分的影响

Journal of Spectral Imaging Pub Date : 2019-10-18 DOI: 10.1255/jsi.2019.a18

O. Leymarie, R. Le Goffic, F. Jamme, C. Chevalier

{"title":"Impact of the influenza protein PB1-F2 on the biochemical composition of human epithelial cells revealed by synchrotron Fourier transform infrared spectromicroscopy","authors":"O. Leymarie, R. Le Goffic, F. Jamme, C. Chevalier","doi":"10.1255/jsi.2019.a18","DOIUrl":"https://doi.org/10.1255/jsi.2019.a18","url":null,"abstract":"PB1-F2 is a non-structural protein of influenza A viruses (IAV) that modulates viral pathogenesis in a host-specific\u0000manner. In mammals, this protein has been shown to increase IAV virulence by delaying the early immune response and,\u0000eventually, exacerbating lung inflammation at the late stage of infection. PB1-F2 is a small protein, but displays very high\u0000sequence polymorphism and sequence length disparity depending on viral strain. These features result in strong variations\u0000 in the cellular activity of PB1-F2. Studies have also reported that the effect of PB1-F2 is cell-type dependent. It has notably\u0000 been shown that PB1-F2 can promote apoptosis in immune cells, but not in epithelial cells. This phenomenon appears to be\u0000 partly related to the higher order structure of the protein, given that the presence of PB1-F2 β-aggregated structures in\u0000infected immune cells correlates with cell death induction. In this work, we evaluated, by synchrotron Fourier transform\u0000infrared spectromicroscopy, the impact of the transient expression of PB1-F2 on the biochemical composition of the human\u0000 epithelial cell line HEK293T. Two PB1-F2 variants that are closely related to each other but derived from a strain with high\u0000[A/BrevigMission/1/1918 (H1N1)] or a low [A/WSN/1933 (H1N1)] virulence were studied here. Infrared spectra analysis\u0000revealed no specific enrichment of β-aggregated structures in PB1-F2-expressing cells. Nevertheless, this analysis\u0000suggested that there is a higher content of β-sheet secondary structures in the PB1-F2 from A/WSN/1933 than that from\u0000A/BrevigMission/1/1918. Our data also showed no change in membrane composition in the presence of PB1-F2, implying\u0000that PB1-F2 does not promote apoptosis in HEK293T cells. Finally, we found that the PB1-F2 from A/WSN/1933 interferes\u0000with adenosine triphosphate production, suggesting that this PB1-F2 variant may disturb the mitochondrial activity.","PeriodicalId":37385,"journal":{"name":"Journal of Spectral Imaging","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42190749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0