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Infrared Imaging

Nabil Bouazizi, Radhouane Bargougui, Pascal Thebault, Thomas Clamens, Florie Desriac, Flavia Fioresi, Guy Ladam, Sandrine Morin-Grognet, Nadine Mofaddel, Olivier Lesouhaitier, Franck Le Derf, Julien Vieillard
This article reports the synthesis and functionalization of a novel CuO@SiO2-APTES@Ag0 core-shell-shell material using a simple and low-cost process. The growth, design strategies and synthesis approach are the key factors for the development of CuO@SiO2-APTES@Ag0 as efficient material with enhanced antibacterial activity. We investigated the morphology, surface charge, structure and stability of our new core-shell-shell by atomic force microscopy, scanning electron microscopy, energy dispersive X-ray, Fourier transform infrared and UV-visible spectroscopies, zeta potential measurements, and differential scanning calorimetry...
December 2, 2017: Journal of Colloid and Interface Science
Matthew Piva, Xian Zhang, J Adam Noah, Steve W C Chang, Joy Hirsch
Interpersonal interaction is the essence of human social behavior. However, conventional neuroimaging techniques have tended to focus on social cognition in single individuals rather than on dyads or groups. As a result, relatively little is understood about the neural events that underlie face-to-face interaction. We resolved some of the technical obstacles inherent in studying interaction using a novel imaging modality and aimed to identify neural mechanisms engaged both within and across brains in an ecologically valid instance of interpersonal competition...
2017: Frontiers in Human Neuroscience
Xiaojian Wu, Mijin Kim, Hyejin Kwon, YuHuang Wang
Quantum defects are an emerging class of synthetic single photon emitters that hold potential for near-infrared imaging, chemical sensing, materials engineering, and quantum information processing. Herein, we show it is possible to optically direct the synthetic creation of molecularly tunable fluorescent quantum defects in semiconducting single-walled carbon nanotube hosts through photochemical reactions. By exciting the host semiconductor with light that resonates with its electronic transition, we find that halide-containing aryl groups can covalently bond to the sp2 carbon lattice...
December 7, 2017: Angewandte Chemie
Young Min Park, Yu Hua Quan, Ki Hyeok Kwon, Jae-Gu Cho, Jeong-Soo Woo, Beop-Min Kim, Yun-Sang Lee, Jae Min Jeong, Hyun Koo Kim, Jae-Jun Song
OBJECTIVE: The aim of this study was to determine the possibility of endoscopic sentinel lymph node biopsy of the head and neck region using indocyanine green-neomannosyl human serum albumin (ICG:MSA) and a custom-made intraoperative color-and-fluorescence-merged imaging system (ICFIS). METHODS: Using mouse and rabbit models of tongue cancer, we performed sentinel lymph node biopsy using an ICG:MSA tracer and custom imaging system equipped with an endoscope. RESULTS: ICG:MSA was localized to the cervical lymph node on the ipsilateral side for up to 30 minutes compared to ICG tracer (ICG n = 3, IGC:MSA n = 3)...
December 7, 2017: Laryngoscope
Shin-Nosuke Uno, Mako Kamiya, Akihiko Morozumi, Yasuteru Urano
We have developed the first green-light-emitting, spontaneously blinking fluorophore (SBF), HEtetTFER. In combination with our near-infrared-light-emitting SBF (HMSiR), HEtetTFER allows dual-colour single-molecule localization microscopy (SMLM) in buffer solution without any additive and without photoactivation.
December 7, 2017: Chemical Communications: Chem Comm
Sarah Hocker, Harold S Rabinovitz, Margaret Oliviero, Jane Grant-Kels, Alon Scope
Distinguishing between benign and malignant neoplasms of the skin is a daily challenge to dermatologists. With the use of a dermatoscope and other imaging devices, the diagnosis is often more precise. The confocal microscope is a device that uses a near-infrared laser to perform noninvasive imaging of the skin. The benefit is that the images immediately provide additional, cellular-level information that can assist in diagnosis. However, lesions may share overlapping characteristics on confocal microscopy, and hence, benign lesions can still display confocal features concerning for a cancerous process, justifying a biopsy...
October 2017: Dermatology Practical & Conceptual
D P Marrone, J S Spilker, C C Hayward, J D Vieira, M Aravena, M L N Ashby, M B Bayliss, M Béthermin, M Brodwin, M S Bothwell, J E Carlstrom, S C Chapman, Chian-Chou Chen, T M Crawford, D J M Cunningham, C De Breuck, C D Fassnacht, A H Gonzalez, T R Greve, Y D Hezaveh, K Lacaille, K C Litke, S Lower, J Ma, M Malkan, T B Miller, W R Morningstar, E J Murphy, D Narayanan, K A Phadke, K M Rotermund, J Sreevani, B Stalder, A A Stark, M L Strandet, M Tang, A Weiß
According to the current understanding of cosmic structure formation, the precursors of the most massive structures in the Universe began to form shortly after the Big Bang, in regions corresponding to the largest fluctuations in the cosmic density field. Observing these structures during their period of active growth and assembly-the first few hundred million years of the Universe-is challenging because it requires surveys that are sensitive enough to detect the distant galaxies that act as signposts for these structures and wide enough to capture the rarest objects...
December 6, 2017: Nature
Daiki Shiozawa, Takahide Sakagami, Yu Nakamura, Shinichi Nonaka, Kenichi Hamada
Carbon fiber-reinforced plastic (CFRP) is widely used for structural members of transportation vehicles such as automobile, aircraft, or spacecraft, utilizing its excellent specific strength and specific rigidity in contrast with the metal. Short carbon fiber composite materials are receiving a lot of attentions because of their excellent moldability and productivity, however they show complicated behaviors in fatigue fracture due to the random fibers orientation. In this study, thermoelastic stress analysis (TSA) using an infrared thermography was applied to evaluate fatigue damage in short carbon fiber composites...
December 6, 2017: Sensors
Min Ho Park, Wonbong Lim, Danbi Jo, Jin Seok Jung, Subin Kim, Jangho Kim, Hyo Soon Lim, Ji Shin Lee, Jung-Joon Min, Hoon Hyun
Early detection and differential diagnosis of breast microcalcifications are of significant importance in effective treatment of early breast cancer, because mineral composition of breast calcification is directly associated with different pathological states. However, applying image-based modalities for component identification in breast calcification remains challenging, because no calcification-specific contrast agent is available to distinguish between benign and malignant (type I and type II, respectively) calcifications of breast lesions...
December 6, 2017: Advanced Healthcare Materials
Fatimah Syahidah Mohamad, Mohd Hazani Mat Zaid, Jaafar Abdullah, Ruzniza Mohd Zawawi, Hong Ngee Lim, Yusran Sulaiman, Norizah Abdul Rahman
This article describes chemically modified polyaniline and graphene (PANI/GP) composite nanofibers prepared by self-assembly process using oxidative polymerization of aniline monomer and graphene in the presence of a solution containing poly(methyl vinyl ether-alt-maleic acid) (PMVEA). Characterization of the composite nanofibers was carried out by Fourier transform infrared (FTIR) and Raman spectroscopy, transmission electron microscopy (TEM) and scanning electron microscopy (SEM). SEM images revealed the size of the PANI nanofibers ranged from 90 to 360 nm in diameter and was greatly influenced by the proportion of PMVEA and graphene...
December 2, 2017: Sensors
Giuseppe Bonifazi, Giuseppe Capobianco, Silvia Serranti
In this work, hyperspectral imaging in the short wave infrared range (SWIR: 1000-2500nm) coupled with chemometric techniques was evaluated as an analytical tool to detect and classify different asbestos minerals, such as amosite ((Fe2+)2(Fe2+,Mg)5Si8O22(OH)2)), crocidolite (Na2(Mg,Fe)6Si8O22(OH)2) and chrysotile (Mg3(Si2O5)(OH)4), contained in cement matrices. Principal Component Analysis (PCA) was used for data exploration and Soft Independent Modeling of Class Analogies (SIMCA) for sample classification. The classification model was built using spectral characteristics of reference asbestos samples and then applied to the asbestos containing materials...
November 29, 2017: Journal of Hazardous Materials
Chien-Hsun Wu, Chun-Hsin Lan, Kuan-Lin Wu, Yao-Ming Wu, Wann-Neng Jane, Michael Hsiao, Han-Chung Wu
Nanocarriers, such as liposomes, have the potential to increase the payload of chemotherapeutic drugs while decreasing toxicity to non-target tissues; such advantageous properties can be further enhanced through surface conjugation of nanocarriers with targeting moieties. We previously reported that SP94 peptides, identified by phage display, exhibited higher binding affinity to human hepatocellular carcinoma (HCC) than to hepatocytes and other normal cells. Here, we confirm the tumor-targeting properties of SP94 peptide by near-infrared fluorescence imaging...
November 16, 2017: International Journal of Oncology
Jingwen Yan, Fengqiu Zhang, Qing Huang
p53 is a crucial tumor suppressor and plays an important role in cell cycle arrest, DNA damage repair, promotion of cell senescence and apoptosis, prevention of DNA damage and maintaining genomic stability and integrity. It has been reported that p53 might also be related to radiation sensitivity, for which the involved effects and processes could be further examined biochemically at the molecular level. In this study, we explored a new spectroscopic approach to probe the radiation-induced biological effects related to p53...
December 5, 2017: Radiation Research
Jessica Miller, Steven T Wang, Inema Orukari, Julie Prior, Gail Sudlow, Xinming Su, Kexian Liang, Rui Tang, Elizabeth M C Hillman, Katherine N Weilbaecher, Joseph P Culver, Mikhail Y Berezin, Samuel Achilefu
Rapid detection of multifocal cancer without the use of complex imaging schemes will improve treatment outcomes. In this study, dynamic fluorescence imaging was used to harness differences in the perfusion kinetics of near infrared fluorescent dyes to visualize structural characteristics of different tissues. Using the hydrophobic non-tumor-selective near infrared dye cypate, and the hydrophilic dye LS288, a high tumor-to-background contrast was achieved, allowing the delineation of diverse tissue types while maintaining short imaging times...
December 5, 2017: Journal of Biophotonics
Valeria Califano, Francesco Bloisi, Giuseppe Perretta, Antonio Aronne, Giovanni Ausanio, Aniello Costantini, Luciano Vicari
Candida rugosa lipase (CRL) was deposited by matrix assisted pulsed laser evaporation (MAPLE) in order to immobilize the enzyme with a preserved native conformation, which ensures its catalytic functionality. For this purpose, the composition of the MAPLE target was optimized by adding the oil phase pentane to a water solution of the amino acid 3-(3,4-dihydroxyphenyl)-2-methyl-l-alanine (m-DOPA), giving a target formed by a frozen water-lipase-pentane microemulsion. Fourier transform infrared (FTIR) spectroscopy and atomic force microscopy (AFM) were used to investigate the structure of MAPLE deposited lipase films...
December 5, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Francesca Gabrieli, Kathryn A Dooley, Jason G Zeibel, James D Howe, John Delaney
Microscale mid-infrared (mid-IR) imaging spectroscopy is used for mapping chemical functional groups. The extension to macroscale imaging requires either the mid-IR radiation reflected off or emitted by the object be greater than the radiation from the thermal background. Reflectance spectra can be obtained using an active IR source to increase the amount of radiation reflected off the object, but rapid heating >4 C can occur, a problem for paintings. Rather than using an active source, by placing a highly reflective tube between the painting and camera and introducing a low temperature source, thermal radiation from the room can be reduced, allowing the IR radiation emitted by the painting to dominate...
December 4, 2017: Angewandte Chemie
Prashant Rao, Jack B Keenan, Taufiek K Rajab, Alice Ferng, Samuel Kim, Zain Khalpey
We describe the intraoperative non-invasive use of an infrared (IR) camera to monitor Del Nido cardioplegia delivery in patients undergoing cardiac surgery. Thermal pictures were taken pre- and post-cardioplegia and at timed points after arrest, and compared to readings from a transseptal temperature probe. There was good concordance between the transseptal probe and the IR camera temperature readings. This non-invasive technique, which assesses cardioplegic distribution, may help to determine when additional doses of Del Nido cardioplegia are required during periods of cardioplegic arrest...
December 3, 2017: Journal of Cardiac Surgery
A L Boskey, L Spevak, Y Ma, H Wang, D C Bauer, D M Black, A V Schwartz
Bone composition evaluated by FTIRI analysis of iliac crest biopsies from post-menopausal women treated with alendronate for 10 years, continuously or alendronate for 5 years, followed by a 5-year alendronate-holiday, only differed with the discontinued biopsies having increased cortical crystallinity and heterogeneity of acid phosphate substitution and decreased trabecular crystallinity heterogeneity. INTRODUCTION: Bisphosphonates (BP) are the most commonly used and effective drugs to prevent fragility fractures; however, concerns exist that prolonged use may lead to adverse events...
December 5, 2017: Osteoporosis International
Nafisa Zohora, Ahmad Esmaielzadeh Kandjani, Antony Orth, Hannah M Brown, Mark R Hutchinson, Brant C Gibson
Conventional organic fluorophores lose their ability to fluoresce after repeated exposure to excitation light due to photobleaching. Therefore, research into emerging bright and photostable nanomaterials has become of great interest for a range of applications such as bio-imaging and tracking. Among these emerging fluorophores, metal oxide-based nanomaterials have attracted significant attention as a potential multifunctional material with photocatalytic and angeogenisis abilities in addition to fluorescnce applications...
December 4, 2017: Scientific Reports
Brian G A Dalton, Abubaker A Ali, Marie Crandall, Ziad T Awad
INTRODUCTION: Anastomotic leak and conduit necrosis are devastating complications following Ivor Lewis esophagectomy. Near infrared imaging (NIR) using IndoCyanine Green allows for real time tissue perfusion assessment which may reduce anastomotic leak during minimally invasive Ivor Lewis esophagectomy (MIE). METHODS: Forty consecutive MIE were performed by a single surgeon at a tertiary referral center. The first 20 were assessed for gastric conduit perfusion by clinical criteria (Group 1)...
November 28, 2017: American Journal of Surgery
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