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"Near infrared spectroscopy"

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https://www.readbyqxmd.com/read/28532050/full-in-vitro-analyses-of-new-generation-bulk-fill-dental-composites-cured-by-halogen-light
#1
Tuçe Hazal Tekin, Aysel Kantürk Figen, Pınar Yılmaz Atalı, Bilge Coşkuner Filiz, Mehmet Burçin Pişkin
The objective of this study was to investigate the full in-vitro analyses of new-generation bulk-fill dental composites cured by halogen light (HLG). Two types' four composites were studied: Surefill SDR (SDR) and Xtra Base (XB) as bulk-fill flowable materials; QuixFill (QF) and XtraFill (XF) as packable bulk-fill materials. Samples were prepared for each analysis and test by applying the same procedure, but with different diameters and thicknesses appropriate to the analysis and test requirements. Thermal properties were determined by thermogravimetric analysis (TG/DTG) and differential scanning calorimetry (DSC) analysis; the Vickers microhardness (VHN) was measured after 1, 7, 15 and 30days of storage in water...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28531282/near-infrared-spectroscopy-derived-lipid-core-burden-index-predicts-adverse-cardiovascular-outcome-in-patients-with-coronary-artery-disease-during-long-term-follow-up
#2
Anne-Sophie Schuurman, Maxime Vroegindewey, Isabella Kardys, Rohit M Oemrawsingh, Jin M Cheng, Sanneke de Boer, Hector M Garcia-Garcia, Robert-Jan van Geuns, Evelyn S Regar, Joost Daemen, Nicolas M van Mieghem, Patrick W Serruys, Eric Boersma, K Martijn Akkerhuis
Aims: Near-infrared spectroscopy (NIRS) is able to quantify cholesterol within coronary arteries by the lipid core burden index (LCBI). We studied the prognostic value of NIRS-derived LCBI in patients with coronary artery disease (CAD) for adverse cardiac outcome during long-term follow-up. Methods and results: During 2009-2013, NIRS was performed in a non-culprit artery of 275 patients undergoing coronary angiography for acute coronary syndrome (ACS) or stable angina...
May 20, 2017: European Heart Journal
https://www.readbyqxmd.com/read/28531129/rapid-and-cost-effective-quantification-of-glucosinolates-and-total-phenolic-content-in-rocket-leaves-by-visible-near-infrared-spectroscopy
#3
Eva María Toledo-Martín, Rafael Font, Sara Obregón-Cano, Antonio De Haro-Bailón, Myriam Villatoro-Pulido, Mercedes Del Río-Celestino
The potential of visible-near infrared spectroscopy to predict glucosinolates and total phenolic content in rocket (Eruca vesicaria) leaves has been evaluated. Accessions of the E. vesicaria species were scanned by NIRS as ground leaf, and their reference values regressed against different spectral transformations by modified partial least squares (MPLS) regression. The coefficients of determination in the external validation (R²VAL) for the different quality components analyzed in rocket ranged from 0.59 to 0...
May 20, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28526867/aberrant-functional-connectivity-in-depression-as-an-index-of-state-and-trait-rumination
#4
David Rosenbaum, Alina Haipt, Kristina Fuhr, Florian B Haeussinger, Florian G Metzger, Hans-Christoph Nuerk, Andreas J Fallgatter, Anil Batra, Ann-Christine Ehlis
Depression has been shown to be related to a variety of aberrant brain functions and structures. Particularly the investigation of alterations in functional connectivity (FC) in major depressive disorder (MDD) has been a promising endeavor, since a better understanding of pathological brain networks may foster our understanding of the disease. However, the underling mechanisms of aberrant FC in MDD are largely unclear. Using functional near-infrared spectroscopy (fNIRS) we investigated FC in the cortical parts of the default mode network (DMN) during resting-state in patients with current MDD...
May 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28523228/resting-state-and-personality-component-bis-bas-predict-the-brain-activity-eeg-and-fnirs-measure-in-response-to-emotional-cues
#5
Michela Balconi, Maria E Vanutelli, Elisabetta Grippa
INTRODUCTION: The present study explored the role of resting state and personality component (BIS/BAS measure) on prefrontal cortical responsiveness to emotional cues. Indeed, we supposed that lateralized resting activity (right vs. left) and approach (BAS) versus avoidance (BIS) attitude may explain the successive emotional processing within the prefrontal cortex (PFC) based on the stimulus valence (positive and negative emotional cues). METHODS: Hemodynamic (functional near-infrared spectroscopy, fNIRS) and electroencephalographic (EEG) measures were considered...
May 2017: Brain and Behavior
https://www.readbyqxmd.com/read/28516424/differing-developmental-trajectories-in-heart-rate-responses-to-speech-stimuli-in-infants-at-high-and-low-risk-for-autism-spectrum-disorder
#6
Katherine L Perdue, Laura A Edwards, Helen Tager-Flusberg, Charles A Nelson
We investigated heart rate (HR) in infants at 3, 6, 9, and 12 months of age, at high (HRA) and low (LRC) familial risk for ASD, to identify potential endophenotypes of ASD risk related to attentional responses. HR was extracted from functional near-infrared spectroscopy recordings while infants listened to speech stimuli. Longitudinal analysis revealed that HRA infants and males generally had lower baseline HR than LRC infants and females. HRA infants showed decreased HR responses to early trials over development, while LRC infants showed increased responses...
May 17, 2017: Journal of Autism and Developmental Disorders
https://www.readbyqxmd.com/read/28514717/quantification-of-active-ingredients-in-semi-solid-pharmaceutical-formulations-by-near-infrared-spectroscopy
#7
Lisa B Schlegel, Manfred Schubert-Zsilavecz, Mona Abdel-Tawab
Near infrared (NIR) spectroscopy is increasingly gaining significance in the pharmaceutical industry for quality and in-process control. However, the potential of this method for quantitative quality control in pharmacies has long been neglected and little data is available on its application in analysis of creams and ointments. This study evaluated the applicability of NIR spectrometer with limited wavelength range (1000-1900nm) for quantitative quality control of six different dermatological semi-solid pharmaceutical preparations...
May 6, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28514318/cerebral-oxygen-saturation-in-children-with-congenital-heart-disease-and-chronic-hypoxemia
#8
Barry D Kussman, Peter C Laussen, Paul B Benni, Francis X McGowan, Doff B McElhinney
BACKGROUND: Increased hemoglobin (Hb) concentration accompanying hypoxemia is a compensatory response to maintain tissue oxygen delivery. Near infrared spectroscopy (NIRS) is used clinically to detect abnormalities in the balance of cerebral tissue oxygen delivery and consumption, including in children with congenital heart disease (CHD). Although NIRS-measured cerebral tissue O2 saturation (ScO2) correlates with arterial oxygen saturation (SaO2), jugular bulb O2 saturation (SjbO2), and Hb, little data exist on the interplay between these factors and cerebral O2 extraction (COE)...
May 12, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28511778/elevated-cranial-ultrasound-resistive-indices-are-associated-with-improved-neurodevelopmental-outcomes-one-year-after-pediatric-cardiac-surgery-a-single-center-pilot-study
#9
Christopher L Jenks, Ana Hernandez, Peter L Stavinoha, Michael C Morris, Fenghua Tian, Hanli Liu, Parvesh Garg, Joseph M Forbess, Joshua Koch
OBJECTIVE: To determine if a non-invasive, repeatable test can be used to predict neurodevelopmental outcomes in patients with congenital heart disease. METHODS: This was a prospective study of pediatric patients less than two months of age undergoing congenital heart surgery at the Children's Health Children's Medical Center at Dallas. Multichannel near-infrared spectroscopy (NIRS) was utilized during the surgery, and ultrasound (US) resistive indices (RI) of the major cranial vessels were obtained prior to surgery, immediately post-operatively, and prior to discharge...
May 13, 2017: Heart & Lung: the Journal of Critical Care
https://www.readbyqxmd.com/read/28507595/differential-therapeutic-effects-of-atomoxetine-and-methylphenidate-in-childhood-attention-deficit-hyperactivity-disorder-as-measured-by-near-infrared-spectroscopy
#10
Yoko Nakanishi, Toyosaku Ota, Junzo Iida, Kazuhiko Yamamuro, Naoko Kishimoto, Kosuke Okazaki, Toshifumi Kishimoto
BACKGROUND: The stimulant methylphenidate (MPH) and the nonstimulant atomoxetine (ATX) are the most commonly-prescribed pharmacological treatments for attention deficit/hyperactivity disorder (ADHD). However, the drug-specific mechanism of action on brain function in ADHD patients is not well known. This study examined differences in prefrontal hemodynamic activity between MPH and ATX in children with ADHD as measured by near-infrared spectroscopy (NIRS) using the Stroop color-word task...
2017: Child and Adolescent Psychiatry and Mental Health
https://www.readbyqxmd.com/read/28506157/motor-and-sensory-cortical-changes-after-contralateral-cervical-seventh-nerve-root-cc7-transfer-in-patients-with-brachial-plexus-injuries
#11
Ryosuke Kakinoki, Scott F M Duncan, Ryosuke Ikeguchi, Souichi Ohta, Manabu Nankaku, Hiroshi Sakai, Takashi Noguchi, Yukitoshi Kaizawa, Masao Akagi
BACKGROUND: Previous animal studies demonstrated that the sensory and motor functions in ipsilesional upper limbs that had been reconstructed by CC7 transfer eventually associated with the contralesional brain cortices that had originally mediated the functions of the ipsilesional upper limbs before brachial plexus injury (BPI). Our hypothesis was that the same findings would be seen in humans. METHODS: Four patients with total BPI treated with CC7 transfer were included...
June 2017: Journal of Hand Surgery Asian-Pacific Volume
https://www.readbyqxmd.com/read/28505165/determination-of-fruit-maturity-and-its-prediction-model-based-on-the-pericarp-index-of-absorbance-difference-iad-for-peaches
#12
Binbin Zhang, Bin Peng, Chunhua Zhang, Zhizhong Song, Ruijuan Ma
Harvest maturity is closely related to peach fruit quality and has a very important effect on the fresh fruit market. Unfortunately, at present, it is difficult to determine the maturity level of peach fruits by artificial methods. The objectives of this study were to develop quadratic polynomial regression models using near-infrared spectroscopy that could determine the peel color difference, fruit firmness, soluble solids content (SSC), soluble sugar, organic acid components, and their relationships with the absorbance of chlorophyll (index of absorbance difference, IAD) in late maturing 'Xiahui 8' peach and 'Xiaguang' nectarine fruits...
2017: PloS One
https://www.readbyqxmd.com/read/28505021/use-of-a-short-acting-%C3%AE-1-blocker-during-endotoxemia-may-reduce-cerebral-tissue-oxygenation-if-hemodynamics-are-depressed-by-a-decrease-in-heart-rate
#13
Tadayoshi Kurita, Shingo Kawashima, Koji Morita, Yoshiki Nakajima
BACKGROUND: A decrease in heart rate (HR) using a short-acting β blocker has potential benefits in sepsis; however, depression of hemodynamics and reduction of cerebral oxygenation may also occur in endotoxemia. METHODS: Seventeen swine were allocated to landiolol or control groups. In the landiolol group, the dose was sequentially changed from 0 to 40 to 200 μg kg min, and stopped. Hemodynamics, blood variables, and the cerebral tissue oxygenation index (TOI) were recorded by near infrared spectroscopy at each dose...
June 2017: Shock
https://www.readbyqxmd.com/read/28504643/exploiting-neurovascular-coupling-a-bayesian-sequential-monte-carlo-approach-applied-to-simulated-eeg-fnirs-data
#14
Pierpaolo Croce, Filippo Zappasodi, Arcangelo Merla, Antonio Chiarelli
OBJECTIVE: Electrical and hemodynamic brain activity are linked through the neurovascular coupling process and they can be simultaneously measured through integration of Electroencephalography (EEG) and functional Near-Infrared Spectroscopy (fNIRS). Thanks to the lack of electro-optical interference, the two procedures can be easily combined and, whereas EEG provides electrophysiological information, fNIRS can provide measurements of two hemodynamic variables, such as oxygenated and deoxygenated hemoglobin...
May 15, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28502619/an-apology-or-absolution-for-cerebral-near-infrared-spectroscopy-can-we-get-on-the-same-wavelength
#15
EDITORIAL
Rohit Rao, John J Nigro, Tara Karamlou
No abstract text is available yet for this article.
April 23, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28499979/inspiratory-muscle-training-improves-intercostal-and-forearm-muscle-oxygenation-in-patients-with-chronic-heart-failure-evidence-of-the-origin-of-the-respiratory-metaboreflex
#16
Adalgiza M Moreno, Alessandra C Toledo-Arruda, Jéssica S Lima, Carolina S Duarte, Humberto Vilacortta-Junior, Antonio C L Nóbrega
BACKGROUND: The impact of inspiratory muscle training (IMT) on respiratory and peripheral muscle oxygenation and perfusion during inspiratory muscle fatigue in patients with chronic heart failure has not been established. METHODS AND RESULTS: Twenty-six patients with chronic heart failure were randomly assigned to either 8 weeks of IMT or to a control group. Inspiratory fatigue was induced by a progressive inspiratory resistive loading protocol until there was an inability to sustain inspiratory pressure, when the inspiratory muscle metaboreflex should be activated...
May 9, 2017: Journal of Cardiac Failure
https://www.readbyqxmd.com/read/28499897/reduced-language-lateralization-in-first-episode-schizophrenia-a-near-infrared-spectroscopy-study
#17
Po-Han Chou, Wei-Hao Lin, Wang-Rung Li, Chih-Mao Huang, Chia-Wei Sun
BACKGROUND: Diminished functional lateralization in language-related areas is found in chronic schizophrenia (SZ). However, whether reduced lateralization exists at the early stage of SZ remains unclear. The present study aimed to investigate language lateralization in first episode schizophrenia (FES) using near infrared spectroscopy (NIRS) during a letter version of verbal fluency test (VFT). METHODS: A total of 28 FES patients and 33 healthy controls (HCs) underwent NIRS while performing a VFT...
May 9, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/28499896/decreased-prefrontal-brain-activation-during-verbal-fluency-task-in-patients-with-somatoform-pain-disorder-an-exploratory-multi-channel-near-infrared-spectroscopy-study
#18
Xiajin Ren, Jinlong Lu, Xiaomin Liu, Chenyu Shen, Xiaoqian Zhang, Xiangyun Ma, Jingjing Sun, Gaoxiang Sun, Kun Feng, Bo Xu, Pozi Liu
BACKGROUND: Pain is a common phenomenon. Patients with somatoform pain disorder (SPD) suffer from lasting chronic pain which may cause cognitive impairment. The dysfunction of prefrontal cortex (PFC) may be involved in pain-induced cognition impairment, which is the most important part in regulating of cognitive function. Multi-channel near-infrared spectroscopy (NIRS) is a noninvasive and low-cost functional neuroimaging technique being used to detect the prefrontal cortex activation during cognitive tasks to demonstrate the relationship between PFC dysfunction and cognition impairment in SPD patients...
May 9, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/28496411/calf-compression-sleeves-change-biomechanics-but-not-performance-and-physiological-responses-in-trail-running
#19
Hugo A Kerhervé, Pierre Samozino, Fabrice Descombe, Matthieu Pinay, Guillaume Y Millet, Marion Pasqualini, Thomas Rupp
Introduction: The aim of this study was to determine whether calf compression sleeves (CS) affects physiological and biomechanical parameters, exercise performance, and perceived sensations of muscle fatigue, pain and soreness during prolonged (~2 h 30 min) outdoor trail running. Methods: Fourteen healthy trained males took part in a randomized, cross-over study consisting in two identical 24-km trail running sessions (each including one bout of running at constant rate on moderately flat terrain, and one period of all-out running on hilly terrain) wearing either degressive CS (23 ± 2 mmHg) or control sleeves (CON, <4 mmHg)...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28494783/genome-wide-association-study-confirm-major-qtl-for-backfat-fatty-acid-composition-on-ssc14-in-duroc-pigs
#20
Maren van Son, Eli Gjerlaug Enger, Harald Grove, Roger Ros-Freixedes, Matthew P Kent, Sigbjørn Lien, Eli Grindflek
BACKGROUND: Fatty acid composition contributes importantly to meat quality and is essential to the nutritional value of the meat. Identification of genetic factors underlying levels of fatty acids can be used to breed for pigs with healthier meat. The aim of this study was to conduct genome-wide association studies (GWAS) to identify QTL regions affecting fatty acid composition in backfat from the pig breeds Duroc and Landrace. RESULTS: Using data from the Axiom porcine 660 K array, we performed GWAS on 454 Duroc and 659 Landrace boars for fatty acid phenotypes measured by near-infrared spectroscopy (NIRS) technology (C16:0, C16:1n-7, C18:0, C18:1n-9, C18:2n-6, C18:3n-3, total saturated fatty acids, monounsaturated fatty acids and polyunsaturated fatty acids)...
May 11, 2017: BMC Genomics
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