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Near infrared

J Liu, S-K Zhang, J-M Luo, Q-Z Hu, W-Y Ma, S-Z Wu
OBJECTIVE:   To study changes in the cerebrovascular reactivity (CVR) at different altitude area in healthy adults. SUBJECTS AND METHODS: CVR was tested using transcranial Doppler combined with CO2 inhalation, near-infrared spectroscopy (NIRS) was used to detect the regional cerebral oxygen saturation (rScO2). Blood samples were collected, and the vasoactive substances in serum were detected using the enzyme-linked immunosorbent assay. In this study, 59 healthy adults were divided into 3 groups: low altitude group, medium altitude group and high altitude group...
March 2018: European Review for Medical and Pharmacological Sciences
Xiaoyan Yang, Dongya Wang, Yunhao Shi, Jianhua Zou, Qisen Zhao, Qi Zhang, Wei Huang, Jinjun Shao, Xiaoji Xie, Xiaochen Dong
In preclinical and clinical research, to destroy cancers, particularly those located in deep tissues is still a great challenge. Photodynamic therapy and photothermal therapy are promising alternative approaches for tissue cancer curing. Black phosphorus (BP) based nanomaterials, with broad UV-vis near-infrared (NIR) absorbance and excellent photothermal effect, have shown great potential in biomedical applications. Herein, a biocompatible therapeutic platform, Chlorin e6 (Ce6) decorated BP nanosheets (NSs), has been developed for fluorescence and thermal imaging guided photothermal and photodynamic synergistic cancer treatment...
March 22, 2018: ACS Applied Materials & Interfaces
Alessandra Biancolillo, Silvia De Luca, Sebastian Bassi, Léa Roudier, Remo Bucci, Andrea D Magrì, Federico Marini
Common hazelnuts are widely present in human diet all over the world, and their beneficial effects on the health have been extensively investigated and demonstrated. Different in-depth researches have highlighted that the harvesting area can define small variations in the chemical composition of the fruits, affecting their quality. As a consequence, it has become relevant to develop methodologies which would allow authenticating and tracing hazelnuts. In the light of this, the present work aims to develop a non-destructive method for the authentication of a specific high-quality Italian hazelnut, "Nocciola Romana," registered with a protected designation of origin (PDO)...
March 21, 2018: Environmental Science and Pollution Research International
Hao Wan, Jingying Yue, Shoujun Zhu, Takaaki Uno, Xiaodong Zhang, Qinglai Yang, Kuai Yu, Guosong Hong, Junying Wang, Lulin Li, Zhuoran Ma, Hongpeng Gao, Yeteng Zhong, Jessica Su, Alexander L Antaris, Yan Xia, Jian Luo, Yongye Liang, Hongjie Dai
Fluorescence imaging of biological systems in the second near-infrared (NIR-II, 1000-1700 nm) window has shown promise of high spatial resolution, low background, and deep tissue penetration owing to low autofluorescence and suppressed scattering of long wavelength photons. Here we develop a bright organic nanofluorophore (named p-FE) for high-performance biological imaging in the NIR-II window. The bright NIR-II >1100 nm fluorescence emission from p-FE affords non-invasive in vivo tracking of blood flow in mouse brain vessels...
March 21, 2018: Nature Communications
Rinat O Esenaliev, Irene Y Petrov, Yuriy Petrov, Jutatip Guptarak, Deborah R Boone, Emanuele Mocciaro, Harris Weisz, Margaret O Parsley, Stacy L Sell, Helen L Hellmich, Jonathan M Ford, Connor Pogue, Douglas DeWitt, Donald S Prough, Maria Adelaide Micci
We have developed a novel, non-invasive Nano-Pulsed Laser Therapy (NPLT) system that combines the benefits of near-infrared laser light (808 nm) and ultrasound (optoacoustic) waves, which are generated with each short laser pulse within the tissue. We tested NPLT in a rat model of blast-induced neurotrauma to determine whether transcranial application of NPLT provides neuroprotective effects. The laser pulses were applied on the intact rat head one hour after injury using a specially developed fiber-optic system...
March 21, 2018: Journal of Neurotrauma
Jan Zitzmann, Tobias Weidner, Gerrit Eichner, Denise Salzig, Peter Czermak
The production of recombinant proteins in bioreactors requires real-time process monitoring and control to increase process efficiency and to meet the requirements for a comprehensive audit trail. The combination of optical near-infrared turbidity sensors and dielectric spectroscopy provides diverse system information because different measurement principles are exploited. We used this combination of techniques to monitor and control the growth and protein production of stably transformed Drosophila melanogaster S2 cells expressing antimicrobial proteins...
March 18, 2018: Sensors
Qingna Zhao, Xueze Lv, Yaxiong Jia, Yu Chen, Guiyun Xu, Lujiang Qu
Current analytical methods used for composition analysis of egg products are time consuming and laborious. We developed a near-infrared reflectance spectroscopy (NIRS)-based method to determine the fat, moisture, and protein contents in homogenized egg yolk and the moisture and protein contents in homogenized egg albumen to substitute for conventional methods. The coefficients of determination in the external validation set (R2P) were over 0.8 for all chemical compositions. The ratios of performance to standard deviation (RPD) were 4...
March 19, 2018: Poultry Science
Jinbao Liu, Yang Zhang, Huanyuan Wang, Yichun Du
The estimation of soils heavy metal content can reflect the impending surroundings of surface, which lays theoretical foundation for using covered vegetation to monitor environment and investigate resource. In this study, the contents of Cr, Mn, Ni, Cu, Zn, As, Cd, Hg and Pb in 44 soil samples were collected from Fufeng County, Yangling County and Wugong County, Shaanxi Province and were used as data sources. ASD FieldSpec HR (350-2500nm), and then the NOR, MSC and SNV of the reflectance were pretreated, the first deviation, second deviation and reflectance reciprocal logarithmic transformation were carried out...
March 14, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
Yoshihiro Kawakubo, Masaya Yanagi, Noa Tsujii, Osamu Shirakawa
In applications of near-infrared spectroscopy (NIRS) in clinical psychiatry settings in Japan, a phonemic verbal fluency test (VFT) that includes "switching" (the ability to shift efficiently to a new word subcategory) to assess phonemic fluency is employed to capture disease-specific hemodynamic changes in the prefrontal cortex (PFC). In this study, to extend the specific features of this test, the VFT was repeated to examine an activation change in NIRS measurements in 20 healthy males. Without task performance change, the hemodynamic activation induced by the VFT was significantly attenuated in the left PFC through repetition of the task...
2018: PloS One
Frédéric Kosmowski, Tigist Worku
Crop cultivar identification is fundamental for agricultural research, industry and policies. This paper investigates the feasibility of using visible/near infrared hyperspectral data collected with a miniaturized NIR spectrometer to identify cultivars of barley, chickpea and sorghum in the context of Ethiopia. A total of 2650 grains of barley, chickpea and sorghum cultivars were scanned using the SCIO, a recently released miniaturized NIR spectrometer. The effects of data preprocessing techniques and choosing a machine learning algorithm on distinguishing cultivars are further evaluated...
2018: PloS One
Ozgur Burak Aslan, Isha Datye, Michal J Mleczko, Karen Sze Cheung, Sergiy Krylyuk, Alina Bruma, Irina Kalish, Albert Davydov, Eric Pop, Tony F Heinz
Ultrathin transition metal dichalcogenides (TMDCs) have been recently investigated to understand their optoelectronic properties. Here we study ultrathin Mo0.91 W0.09 Te2 , a semiconducting alloy of MoTe2 , via Raman, photoluminescence (PL), and optical absorption measurements. Mo0.91 W0.09 Te2 transitions from indirect to direct optical band gap in the monolayer limit at 1.1 eV, very close to its MoTe2 counterpart. We apply tensile strain to monolayer MoTe2 and Mo0.91 W0.09 Te2 to tune their band structures for the first time, and we observe that their optical band gaps decrease by ~70 meV at ~2...
March 21, 2018: Nano Letters
Nicole M Mews, Gerald Hörner, Hartmut Schubert, Andreas Berkefeld
The chemistry of radical-ligand complexes of the transition metals has developed into a vibrant field of research that spans from fundamental studies on the relationship between the chemical and electronic structures to applications in catalysis and functional materials chemistry. In general, fine-tuning of the relevant properties relies on an increasingly diversifying pool of radical-proligand structures. Surprisingly, the variability of the conformational freedom and the number of distinct bonding modes supported by many radical proligands is limited...
March 21, 2018: Inorganic Chemistry
Mika Ishigaki, Paralee Puangchit, Yui Yasui, Akane Ishida, Hiroki Hayashi, Yoshihiko Nakayama, Hideya Taniguchi, Ichiro Ishimaru, Yukihiro Ozaki
In the present study, we successfully obtained non-staining blood flow images of a developing fish egg embryo using optical interference caused by the Doppler shift. The spectral distribution of light reflected by moving objects such as the heart and red cells was found to be different from that of the incident light because of the Doppler effect. Interference between different frequency components was observed in an interferogram through heterodyne interaction using an imaging-type two-dimensional Fourier spectroscopic system, and information on the intensities of the spectral components was obtained by Fourier transformation...
March 21, 2018: Analytical Chemistry
Jiang Ouyang, Liqiang Wang, Wansong Chen, Ke Zeng, Yajing Han, Yan Xu, Qunfang Xu, Liu Deng, You-Nian Liu
Biomimetic nanothylakoids, which are constructed from the thylakoid membrane of vegetable leaves, show high efficiency in tumor microenvironment modulation and photodynamic antitumor therapy under near infrared fluorescence guidance. Furthermore, their outstanding biosafety, facile preparation and low cost make nanothylakoids suitable for further clinical applications.
March 21, 2018: Chemical Communications: Chem Comm
Selene Pozzebon, Aaron Blandino Ortiz, Federico Franchi, Stefano Cristallini, Mirko Belliato, Olivier Lheureux, Alexandre Brasseur, Jean-Louis Vincent, Sabino Scolletta, Jacques Creteur, Fabio Silvio Taccone
BACKGROUND: Acute cerebral complications (ACC) of veno-arterial extracorporeal membrane oxygenation (VA-ECMO) are associated with poor long-term neurologic outcome. We described the role of rSO2 monitoring in detecting ACC and desaturations and their relationship with poor outcome when employing VA-ECMO. METHODS: Retrospective analysis of patients monitored by cerebral frontal near-infrared spectroscopy (NIRS) (CAS Medical Systems Inc., Branford, CT, USA) during VA-ECMO (November 2008-December 2015)...
March 20, 2018: Neurocritical Care
Michael Kroeger, Horst Karl, Bernhard Simmler, Peter Singer
Up to now the visual inspection of mobility of isolated anisakid larvae serves as a measure of viability and possible risk of infection. This paper presents a new method to rule out unreliability - caused by the temporary immobility of the larvae and by the human uncertainty factor of visual observation. By means of a Near infrared (NIR) imaging method, elastic curvature energies and geometric shape parameters were determined from contours, and used as a measure of viability. It was based on the modelling of larvae as a cylindrical membrane system...
March 2018: Heliyon
Yasuhiro Uwadaira, Yasuyo Sekiyama, Akifumi Ikehata
Evaluating the maturity of peach fruit is desirable during both the preharvest and postharvest periods, and flesh firmness (FF) is a representative maturity index. Although a non-destructive FF measurement technique using visible (VIS) and near-infrared (NIR) spectroscopy has been developed, the principle has been unclear. This study was conducted to examine the structure of the FF prediction model by comparing with that of the model for measuring water-soluble pectin (WSP) content. Those two prediction models have the same information regions related to the colors of pericarp and mesocarp (chlorophyll) and to a water band in the NIR region...
February 2018: Heliyon
David Rosenbaum, Mara Thomas, Paula Hilsendegen, Florian G Metzger, Florian B Haeussinger, Hans-Christoph Nuerk, Andreas J Fallgatter, Vanessa Nieratschker, Ann-Christine Ehlis
Repetitive thinking styles such as rumination are considered to be a key factor in the development and maintenance of mental disorders. Different situational triggers (e.g., social stressors) have been shown to elicit rumination in subjects exhibiting such habitual thinking styles. At the same time, the process of rumination influences the adaption to stressful situations. The study at hand aims to investigate the effect of trait rumination on neuronal activation patterns during the Trier Social Stress Test (TSST) as well as the physiological and affective adaptation to this high-stress situation...
2018: NeuroImage: Clinical
Bian Jang, Madhappan Santha Moorthy, Panchanathan Manivasagan, Li Xu, Kyeongeun Song, Kang Dae Lee, Minseok Kwak, Junghwan Oh, Jun-O Jin
In advanced cancer therapy, the combinational therapeutic effect of photothermal therapy (PTT) using near-infrared (NIR) light-responsive nanoparticles (NPs) and anti-cancer drug delivery-mediated chemotherapy has been widely applied. In the present study, using a facile, low-cost, and solution-based method, we developed and synthesized fucoidan, a natural polymer isolated from seaweed that has demonstrated anti-cancer effect, and coated NPs with it as an ideal candidate in chemo-photothermal therapy against cancer cells...
February 27, 2018: Oncotarget
Kevin K McCully, Payton Prins, Kajal Mistry, T Bradley Willingham
Background: Symptoms of fatigue and pain are often reported for the trapezius muscle in the shoulder. The present study evaluated endurance in the trapezius muscles of healthy participants using electric twitch mechanomyography (ETM). Methods: Surface electrodes and a tri-axial accelerometer were placed over the left trapezius muscle. Muscles were stimulated for 3 min each at 2 Hz, 4 Hz and 6 Hz. Maintenance of acceleration during muscle twitches was used to calculate an endurance index (EI)...
April 2018: Shoulder & Elbow
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