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https://www.readbyqxmd.com/read/28429598/preliminary-clinical-validation-of-a-differential-correction-method-for-improving-measurement-accuracy-in-noninvasive-measurement-of-blood-glucose-using-near-infrared-spectroscopy
#1
Guang Han, Xuyao Yu, Dandan Xia, Rong Liu, Jin Liu, Kexin Xu
One of the main challenges in the noninvasive sensing of blood glucose by near-infrared (NIR) spectroscopy is the background variations from light source drift, sweating, and temperature change at the human-machine interface. In this paper, a differential correction method based on the spectra from the floating-reference position and measuring position is proposed to eliminate these spectral variations from background interferences. Its effectiveness was validated by in vitro and in vivo experiments in which the diffuse reflectance of intralipid solutions and human skin was collected at the source distances of 0...
January 1, 2017: Applied Spectroscopy
https://www.readbyqxmd.com/read/28427684/rapid-and-high-capacity-ultrasonic-assisted-adsorption-of-ternary-toxic-anionic-dyes-onto-mof-5-activated-carbon-artificial-neural-networks-partial-least-squares-desirability-function-and-isotherm-and-kinetic-study
#2
Hanieh Askari, Mehrorang Ghaedi, Kheibar Dashtian, Mohammad Hossein Ahmadi Azghandi
The present paper focused on the ultrasonic assisted simultaneous removal of fast green (FG), eosin Y (EY) and quinine yellow (QY) from aqueous media following using MOF-5 as a metal organic framework and activated carbon hybrid (AC-MOF-5). The structure and morphology of AC-MOF-5 was identified by SEM, FTIR and XRD analysis. The interactive and main effects of variables such as pH, initial dyes concentration (mgL(-1)), adsorbent dosage (mg) and sonication time (min) on removal percentage were studied by central composite design (CCD), subsequent desirability function (DF) permit to achieved real variable experimental condition...
July 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28425490/urinary-and-fecal-metabonomics-study-of-the-protective-effect-of-chaihu-shu-gan-san-on-antibiotic-induced-gut-microbiota-dysbiosis-in-rats
#3
Meng Yu, Hong-Mei Jia, Chao Zhou, Yong Yang, Li-Li Sun, Zhong-Mei Zou
Accumulating evidence suggests that the gut microbiota dysbiosis and their host metabolic phenotype alteration is an important factor in human disease development. A traditional Chinese herbal formula, Chaihu-Shu-Gan-San (CSGS), has been effectively used in the treatment of various gastrointestinal (GI) disorders. The present study was carried out to investigate whether CSGS modulates the host metabolic phenotype under the condition of gut microbiota dysbiosis. The metabonomics studies of biochemical changes in urine and feces of antibiotic-induced gut microbiota dysbiosis rats after treatment with CSGS were performed using UPLC-Q-TOF/MS...
April 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28425351/metabolic-changes-in-methomyl-poisoned-rats-treated-by-vitamin-e
#4
J Weng, B Cai, J Chen, B Chen, H Wu, C Wen, F Sun, L Hu, C Chen, X Wang, Z Wang
In this study, we developed a serum and urine metabolomic method based on gas chromatography-mass spectrometry (GC-MS) combination with biomedical results to evaluate the effect of vitamin E treatment on methomyl poisoning rats. The rats were divided into three groups: the control group, methomyl poisoning group, and vitamin E treatment group. Partial least squares discriminate analysis (PLS-DA) showed that methomyl poisoning induced metabolic perturbations. Compared to the control group, based on the urinary metabolomics data, the level of ribitol, l-proline, xylitol, hydrocinnamic acid, 11-cis-octadecenoic acid, octadecanoic acid, and hexadecanoic acid of methomyl poisoning group increased, while the level of 2,3,4-trihydroxybutyric acid, ethanimidic acid, pantothenic acid, and retinoic acid decreased...
January 1, 2017: Human & Experimental Toxicology
https://www.readbyqxmd.com/read/28424959/non-essential-element-concentrations-in-brown-grain-rice-assessment-by-advanced-data-mining-techniques
#5
Roxana Villafañe, Melisa Hidalgo, Analía Piccoli, Eduardo Marchevsky, Roberto Pellerano
The concentrations of 17 non-essential elements (Al, As, Ba, Be, Cd, Ce, Cr, Hg, La, Li, Pb, Sb, Sn, Sr, Th, Ti, and Tl) were determined in brown grain rice samples of two varieties: Fortuna and Largo Fino. The samples were collected from the four main producing regions of Corrientes province (Argentina). Quantitative determinations were performed by inductively coupled plasma mass spectrometry (ICP-MS), using a validated method. The contents of As, Be, Cd, Ce, Cr, Hg, Pb, Sb, Sn, Th, and Tl were very low or not detected in most samples...
April 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28424595/gray-matter-atrophy-is-primarily-related-to-demyelination-of-lesions-in-multiple-sclerosis-a-diffusion-tensor-imaging-mri-study
#6
Eszter Tóth, Nikoletta Szabó, Gergõ Csete, András Király, Péter Faragó, Tamás Spisák, Krisztina Bencsik, László Vécsei, Zsigmond T Kincses
Objective: Cortical pathology, periventricular demyelination, and lesion formation in multiple sclerosis (MS) are related (Hypothesis 1). Factors in the cerebrospinal fluid close to these compartments could possibly drive the parallel processes. Alternatively, the cortical atrophy could be caused by remote axonal transection (Hypothesis 2). Since MRI can differentiate between demyelination and axon loss, we used this imaging modality to investigate the correlation between the pattern of diffusion parameter changes in the periventricular- and deep white matter and the gray matter atrophy...
2017: Frontiers in Neuroanatomy
https://www.readbyqxmd.com/read/28424496/the-chemical-characterization-of-nigerian-propolis-samples-and-their-activity-against-trypanosoma-brucei
#7
Ruwida Omar, John O Igoli, Tong Zhang, Alexander I Gray, Godwin U Ebiloma, Carol J Clements, James Fearnley, RuAngeli Edrada Ebel, Tim Paget, Harry P de Koning, David G Watson
Profiling of extracts from twelve propolis samples collected from eight regions in Nigeria was carried out using high performance liquid chromatography (LC) coupled with evaporative light scattering (ELSD), ultraviolet detection (UV) and mass spectrometry (MS), gas chromatography mass spectrometry (GC-MS) and nuclear magnetic resonance spectroscopy (NMR). Principal component analysis (PCA) of the processed LC-MS data demonstrated the varying chemical composition of the samples. Most of the samples were active against Trypanosoma b...
April 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28420467/-study-of-plasma-amino-acid-related-metabolites-of-septic-rats-using-gas-chromatography-mass-spectrometry
#8
Jin Su, Yimin Zhu, Yu Jiang, Lianhong Zou, Xiaoliang Liu, Yixiao Xu
OBJECTIVE: To reveal the pathophysiological changes of sepsis, the plasma metabonomics of septic rats was determined and differential metabolites were determined by gas chromatography-mass spectrometry (GC-MS). METHODS: Male Spraguee-Dawley (SD) rats about 8 weeks were randomly divided into sham group (n = 18) and sepsis group (n = 24). Cecal ligation and puncture (CLP) was used to build sepsis model, while cecum was kept intact only in the sham group. 6 hours after the operation, rats were anesthetized, and blood was harvested through heart thoracotomy...
April 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/28420092/analysis-of-sub-lethal-toxicity-of-perfluorooctane-sulfonate-pfos-to-daphnia-magna-using-%C3%A2-h-nuclear-magnetic-resonance-based-metabolomics
#9
Martha N Kariuki, Edward G Nagato, Brian P Lankadurai, André J Simpson, Myrna J Simpson
¹H nuclear magnetic resonance (NMR)-based metabolomics was used to characterize the response of Daphnia magna after sub-lethal exposure to perfluorooctane sulfonate (PFOS), a commonly found environmental pollutant in freshwater ecosystems. Principal component analysis (PCA) scores plots showed significant separation in the exposed samples relative to the controls. Partial least squares (PLS) regression analysis revealed a strong linear correlation between the overall metabolic response and PFOS exposure concentration...
April 14, 2017: Metabolites
https://www.readbyqxmd.com/read/28419252/sensitive-determination-of-cannabinoids-in-whole-blood-by-lc-ms-ms-after-rapid-removal-of-phospholipids-by-filtration
#10
Lambert K Sørensen, Jørgen B Hasselstrøm
Direct analysis of Δ9-tetrahydrocannabinol (THC) and other cannabinoids in crude acetonitrile extracts of whole blood by liquid chromatography-tandem mass spectrometry using pneumatically assisted electrospray ionization (LC-ESI-MS-MS) was subjected to pronounced ion suppression from co-eluting phospholipids (PLs). The interferences were mainly caused by the lysophosphatidylcholine and lysophosphatidylethanolamine classes of PLs. The PLs were easily removed from crude extracts by filtration through a sorbent with Lewis acid properties, which typically increased the THC and cannabinol (CBN) signal intensities by a factor of 5...
April 17, 2017: Journal of Analytical Toxicology
https://www.readbyqxmd.com/read/28417359/an-improved-kinetic-assay-for-the-characterization-of-metal-dependent-pectate-lyases
#11
Darryl R Jones, Richard McLean, D Wade Abbott
Pectate lyases are a subset of polysaccharide lyases (PLs) that specifically utilize a metal dependent β-elimination mechanism to cleave glyosidic bonds in homogalacturonan (HG; α-D-1,4-galacturonic acid). Most commonly, PLs harness calcium for catalysis; however, some PL families (e.g., PL2 and PL22) display preferences for transitional metals. Deploying alternative metals during β-elimination is correlated with signature coordination pocket chemistry, and is reflective of the evolution, functional specialization, and cellular location of PL activity...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28416312/periapical-lesions-increase-macrophage-infiltration-and-inflammatory-signaling-in-muscle-tissue-of-rats
#12
Renato Felipe Pereira, Luciano Tavares Angelo Cintra, Gestter Willian Lattari Tessarin, Fernando Yamamoto Chiba, Maria Sara de Lima Coutinho Mattera, Natalia Francisco Scaramele, Thais Verônica Saori Tsosura, Edilson Ervolino, Sandra Helena Penha de Oliveira, Doris Hissako Sumida
INTRODUCTION: Our previous studies have shown that periapical lesions (PLs) in rats cause systemic disorders such as increased tumor necrosis factor-α plasma levels, insulin resistance, and impairment in insulin signal transduction in muscle tissue. However, the mechanisms involved in these alterations are not fully understood. Under chronic inflammatory conditions such as obesity, it has been shown that the skeletal muscle is affected by inflammation, and the number of resident macrophages that are associated with impairments of insulin action and sensitivity is increased...
April 14, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28414908/an-experimental-computational-study-of-carbon-nanotubes-effects-on-mitochondrial-respiration-in-silico-nano-qspr-machine-learning-models-based-on-new-raman-spectra-transform-with-markov-shannon-entropy-invariants
#13
Michael González-Durruthy, Luciane Carla Alberici, Zeki Naal, David T Atique-Sawazaki, Carlos Curti, José Manuel Vázquez-Naya, Humbert Gonzalez-Diaz, Cristian Robert Munteanu
The study of selective toxicity of carbon nanotubes (CNT) on mitochondria (CNT-mitotoxicity) is of major interest for future biomedical applications. In the current work, the mitochondrial oxygen consumption (E3) is measured under three experimental conditions by exposure to pristine and oxidized CNTs (hydroxylated and carboxylated). Respiratory functional assays showed that the information of the CNT-Raman spectroscopy could be useful to predict structural parameters of mitotoxicity induced by CNTs. The in vitro functional assays show that the mitochondrial oxidative phosphorylation by ATP-synthase (or state V3 of respiration) was not perturbed in isolated rat-liver mitochondria...
April 17, 2017: Journal of Chemical Information and Modeling
https://www.readbyqxmd.com/read/28414467/variation-of-bacterial-communities-with-water-quality-in-an-urban-tropical-catchment
#14
Jean Pierre Nshimyimana, Adam Joshua Ehrich Freedman, Peter Shanahan, Lloyd C H Chua, Janelle Renee Thompson
A major challenge for assessment of water quality in tropical environments is the natural occurrence and potential growth of Fecal Indicator Bacteria (FIB). To gain a better understanding of the relationship between measured levels of FIB and the distribution of sewage-associated bacteria including potential pathogens in the tropics this study compared the abundance of FIB (Total coliforms and E. coli) and the Bacteroidales (HF183 marker) with bacterial community structure determined by next-generation amplicon sequencing...
April 17, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28413091/-what-we-have-here-is-a-failure-to-communicate-association-of-preferred-language-with-the-rate-of-psychiatric-consultation
#15
Stephanie G Cheung, Adrienne D Mishkin, Peter A Shapiro
BACKGROUND: In the United States, people with limited English proficiency (LEP) receive poorer medical care than those proficient in English. Few studies demonstrate how linguistic barriers complicate psychiatric care; in consultation-liaison (C-L) psychiatry, there are no published data about care disparities for patients with LEP or for whom English is not the preferred language (PL). OBJECTIVE: We sought to determine if PL affects the psychiatric consultation rate...
February 20, 2017: Psychosomatics
https://www.readbyqxmd.com/read/28412875/amino-acid-and-acylcarnitine-profiles-in-perinatal-asphyxia-a-case-control-study
#16
Ola Galal El-Farghali, Mohamed Sami El-Chimi, Heba Salah El-Abd, Eman El-Desouky
OBJECTIVE: To estimate cord blood amino acid and acylcarnitine levels in term newborns exposed to perinatal asphyxia. MATERIALS AND METHODS: We studied 45 asphyxiated term newborns (cases) and 20 gestational age-matched healthy newborns (control). Sixteen cases developed HIE according to clinical scoring and amplitude-integrated electroencephalography. Asphyxiated cases were accordingly subdivided into: HIE group (n = 16) and Asphyxia group (n = 29). Amino acid and acylcarnitine levels were measured in cord blood dried spot samples from all newborns using ultra-performance liquid chromatography-mass spectrometry (UPLC-MS)...
April 16, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28411824/application-of-benchtop-and-portable-near-infrared-spectrometers-for-predicting-the-optimum-harvest-time-of-verbena-officinalis
#17
Cornelia K Pezzei, Stefan A Schönbichler, Christian G Kirchler, Julia Schmelzer, Shah Hussain, Verena A Huck-Pezzei, Michael Popp, Justine Krolitzek, Günther K Bonn, Christian W Huck
This study examined the applicability of near-infrared (NIR) spectroscopy coupled with multivariate data analysis (MVA) to determine the ideal harvest time of Verbena officinalis. NIR analyses were performed non-invasively on the fresh plant material based on the quantification of the key constituents verbenalin and verbascoside. Vibrational spectroscopic measurements were performed applying a conventional NIR benchtop device as well as a laboratory independent handheld NIR spectrometer. A novel high performance liquid chromatography (HPLC) method was applied as a reference method...
July 1, 2017: Talanta
https://www.readbyqxmd.com/read/28409627/simultaneous-atr-ftir-based-determination-of-malaria-parasitemia-glucose-and-urea-in-whole-blood-dried-onto-a-glass-slide
#18
Supti Roy, David Perez-Guaita, Dean W Andrew, Jack S Richards, Don McNaughton, Philip Heraud, Bayden R Wood
New diagnostic tools that can detect malaria parasites in conjunction with other diagnostic parameters are urgently required. In this study, Attenuated Total Reflection Fourier transform infrared (ATR-FTIR) spectroscopy in combination with Partial Least Square Discriminant Analysis (PLS-DA) and Partial Least Square Regression (PLS-R) have been applied as a point-of-care test for identifying malaria parasites, blood glucose and urea levels in whole blood samples from thick blood films on glass slides. The specificity for the PLS-DA was found to be 98 % for parasitemia levels >0...
April 14, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28408201/spatio-temporal-control-strategy-of-drug-delivery-systems-based-nano-structures
#19
REVIEW
Nahla Rahoui, Bo Jiang, Nadia Taloub, Yu Dong Huang
The drug instability, toxicity and the barrier to the target area necessitate a suitable drug delivery system with an external or internal control of the release. Spatio-temporal control using a surface functionalized nano-carrier seems to be the best alternative for guided drug delivery and release. This manuscript provides a broad spectrum about the drug carrier interface modification to cover the need for temporal drug delivery control under neglect side effects. On the other hand, recent advances related to the drug vehicle are highlighted, besides physical (Electric field, magnetic field, light) or mechanical (Ultrasound, mechanical strain), chemical (pH, redox gradient, enzyme) stimuli mediated DDS...
April 10, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28407890/characterization-and-authentication-of-spanish-pdo-wine-vinegars-using-multidimensional-fluorescence-and-chemometrics
#20
Rocío Ríos-Reina, Saioa Elcoroaristizabal, Juan A Ocaña-González, Diego L García-González, José M Amigo, Raquel M Callejón
This work assesses the potential of multidimensional fluorescence spectroscopy combined with chemometrics for characterization and authentication of Spanish Protected Designation of Origin (PDO) wine vinegars. Seventy-nine vinegars of different categories (aged and sweet) belonging to the Spanish PDOs "Vinagre de Jerez", "Vinagre de Montilla-Moriles" and "Vinagre de Condado de Huelva", were analyzed by excitation-emission fluorescence spectroscopy. A visual assessment of fluorescence landscapes pointed out different trends with vinegar categories...
September 1, 2017: Food Chemistry
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