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https://www.readbyqxmd.com/read/28874711/hemoglobin-diffusion-and-the-dynamics-of-oxygen-capture-by-red-blood-cells
#1
Stéphane Longeville, Laura-Roxana Stingaciu
Translational diffusion of macromolecules in cell is generally assumed to be anomalous due high macromolecular crowding of the milieu. Red blood cells are a special case of cells filled quasi exclusively (95% of the dry weight of the cell) with an almost spherical protein: hemoglobin. Hemoglobin diffusion has since a long time been recognized as facilitating the rate of oxygen diffusion through a solution. We address in this paper the question on how hemoglobin diffusion in the red blood cells can help the oxygen capture at the cell level and hence to improve oxygen transport...
September 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28864168/liuweiwuling-tablets-attenuate-bdl-induced-hepatic-fibrosis-via-modulation-of-tgf-%C3%AE-smad-and-nf-%C3%AE%C2%BAb-signaling-pathways
#2
Huimin Liu, Fang Dong, Guangquan Li, Ming Niu, Congen Zhang, Yanzhong Han, Lanzhi He, Ping Yin, Bin Wang, Xiuxiu Sang, Ruishen Li, Jiabo Wang, Zhaofang Bai, Xiaohe Xiao
ETHNOPHARMACOLOGICAL RELEVANCE: Liuweiwuling (LWWL) tablets contain a six-herb Chinese formula and are commonly prescribed to facilitate nourishment of the liver and kidneys, clear away toxic materials and activate blood circulation. Administration of LWWL is well known for its protective effects on the liver and its capacity to confer long-term stability in patients exhibiting reduced transaminase levels. Clinical studies have reported that LWWL can also be used for the treatment of liver fibrosis with associated treatment regimens resulting in a concomitant reduction in transforming growth factor β1 (TGF-β1) levels in the serum of patients with hepatic fibrosis...
August 31, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28833875/characterization-of-phenolic-compounds-in-green-and-red-oak-leaf-lettuce-cultivars-by-uhplc-dad-esi-qtof-ms-using-ms-e-scan-mode
#3
Gabriela E Viacava, Sara I Roura, Luis A Berrueta, Carmen Iriondo, Blanca Gallo, Rosa M Alonso-Salces
Lettuce (Lactuca sativa) is one of the most popular leafy vegetables in the world and constitutes a major dietary source of phenolic compounds with health promoting properties. In particular, the demand for green and red oak-leaf lettuces have considerably increased in the last years but few data on their polyphenol composition is available. Moreover, the utilization of analytical edge technology can provide new structural information and allow the identification of unknown polyphenols. In the present study the phenolic profiles of green and red oak-leaf lettuce cultivars were exhaustively characterized by ultrahigh performance liquid chromatography (UHPLC) coupled online to diode array detection (DAD), electrospray ionization (ESI) and quadrupole time-of-flight mass spectrometry (QToF/MS), using the MS(E) instrument acquisition mode for recording simultaneously exact masses of precursor and fragment ions...
August 22, 2017: Journal of Mass Spectrometry: JMS
https://www.readbyqxmd.com/read/28829579/anionic-cyclometalated-iridium-iii-complexes-with-a-bis-tetrazolate-ancillary-ligand-for-light-emitting-electrochemical-cells
#4
Elia Matteucci, Andrea Baschieri, Andrea Mazzanti, Letizia Sambri, Jorge Ávila, Antonio Pertegás, Henk J Bolink, Filippo Monti, Enrico Leoni, Nicola Armaroli
A series of monoanionic Ir(III) complexes (2-4) of general formula [Ir(C^N)2(b-trz)](TBA) are presented, where C^N indicates three different cyclometallating ligands (Hppy = 2-phenylpyridine; Hdfppy = 2-(2,4-difluoro-phenyl)pyridine; Hpqu = 2-methyl-3-phenylquinoxaline), b-trz is a bis-tetrazolate anionic N^N chelator (H2b-trz = di(1H-tetrazol-5-yl)methane), and TBA = tetrabutylammonium. 2-4 are prepared in good yields by means of the reaction of the suitable b-trz bidentate ligand with the desired iridium(III) precursor...
August 22, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28807068/secular-trends-in-dietary-patterns-of-young-children-in-brazil-from-1996-to-2006
#5
Ana Elisa Madalena Rinaldi, Wolney Lisboa Conde
OBJECTIVE: To describe dietary patterns (DP) from 1996 to 2006 and in the first 5 years of life and to explore individual and contextual characteristics associated with each DP. DESIGN: DP were defined by principal component analysis. The association between DP and individual (sociodemographic, maternal and child) and contextual (geographic regional and year) characteristics was analysed by multilevel analysis. SETTING: Two complex probabilistic Brazilian Demographic and Health Surveys (BDHS 1996, 2006)...
August 15, 2017: Public Health Nutrition
https://www.readbyqxmd.com/read/28779769/lead-halide-perovskite-nanocrystals-from-discovery-to-self-assembly-and-applications
#6
Maksym V Kovalenko, Maryna I Bodnarchuk
Lead halide perovskites (LHPs) of the general formula APbX3 (A=Cs+, CH3NH3+, or CH(NH2)2+; X=Cl, Br, or I) have recently emerged as a unique class of low-cost, versatile semiconductors of high optoelectronic quality. These materials offer exceptionally facile solution-based engineerability in the form of bulk single crystals, thin films, or supported and unsupported nanostructures. The lattermost form, especially as colloidal nanocrystals (NCs), holds great promise as a versatile photonic source, operated via bright photoluminescence (PL) in displays or lighting (energy down-conversion of blue light into green and red), or via electroluminescence in light-emitting diodes...
August 9, 2017: Chimia
https://www.readbyqxmd.com/read/28741030/hidden-and-overall-haemorrhage-following-minimally-invasive-and-open-transforaminal-lumbar-interbody-fusion
#7
Yang Yang, Liangming Zhang, Bin Liu, Mao Pang, Peigen Xie, Zihao Chen, Wenbin Wu, Feng Feng, Limin Rong
BACKGROUND: Hidden haemorrhage has been proved to be significant in joint surgery. However, when referring to lumbar interbody fusion, it is often ignored because of its invisibility. This randomized controlled study aimed to calculate and compare hidden haemorrhage following minimally invasive and open transforaminal lumbar interbody fusion (MIS-TLIF and open TLIF). Meanwhile, its clinical significance was also analyzed. MATERIALS AND METHODS: A total of 41 patients were included in this study, then they were randomized to receive MIS-TLIF or open TLIF, 21 and 20, respectively...
July 24, 2017: Journal of Orthopaedics and Traumatology: Official Journal of the Italian Society of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/28685711/static-and-time-resolved-mid-infrared-spectroscopy-of-hg0-95cd0-05cr2se4-spinel
#8
S Barsaume, A V Telegin, Yu P Sukhorukov, N Stavrias, V A Fedorov, T K Menshchikova, A V Kimel
Static and time-resolved mid-infrared spectroscopy of ferromagnetic single crystal Hg0.95Cd0.05Cr2Se4 was performed below the absorption edge, in order to reveal the origin of the electronic transitions contributing to the magneto-optical properties of this material. The mid-infrared spectroscopy reveals a strong absorption peak around 0.236 eV which formerly was assigned to a transition within the selenide-chromium complexes ([Formula: see text] Se-Cr(2+)). To reveal the sensitivity of the transition to the magnetic order, we performed the studies in a temperature range across the Curie temperature and magnetic fields across the value at which the saturation of ferromagnetic magnetization occurs...
August 16, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28658585/transport-and-flow-characteristics-of-an-oscillating-cylindrical-fiber-for-total-artificial-lung-application
#9
Adnan Qamar, Joseph L Bull
Mass transport and fluid dynamics characteristics in the vicinity of an oscillating cylindrical fiber with an imposed pulsatile inflow condition are computationally investigated in the present study. The work is motivated by a recently proposed design modification to the Total Artificial Lung (TAL) device, which is expected to provide better gas exchange. Navier-Stokes computations, coupled with convection-diffusion equation are performed to assess flow dynamics and mass transport behavior around the oscillating fiber...
August 2017: Computer Methods in Biomechanics and Biomedical Engineering
https://www.readbyqxmd.com/read/28651697/docosahexaenoic-acid-dha-and-arachidonic-acid-ara-balance-in-developmental-outcomes
#10
John Colombo, D Jill Shaddy, Elizabeth H Kerling, Kathleen M Gustafson, Susan E Carlson
The DHA Intake and Measurement of Neural Development (DIAMOND) trial represents one of only a few studies of the long-term dose-response effects of LCPUFA-supplemented formula feeding during infancy. The trial contrasted the effects of four formulations: 0.00% docosahexaenoic acid (DHA)/0.00% arachidonic acid (ARA), 0.32% DHA/0.64% ARA, 0.64% DHA/0.64% ARA, and 0.96% DHA/0.64% ARA against a control condition (0.00% DHA/0.00% ARA). The results of this trial have been published elsewhere, and show improved cognitive outcomes for infants fed supplemented formulas, but a common finding among many of the outcomes show a reduction of benefit for the highest DHA dose (i...
June 2017: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/28597705/evaluation-of-applying-a-combination-of-red-cell-indexes-and-formulas-to-differentiate-%C3%AE-thalassemia-trait-from-iron-deficiency-anemia-in-the-thai-population
#11
Sakorn Pornprasert, Choosak Thongsat, Uraiporn Panyachadporn
Red cell indexes and formulas have been established as simple, fast, and inexpensive tools to differentiate β-thalassemia (β-thal) trait from iron deficiency anemia. However, none of them showed 100.0% sensitivity and specificity. Moreover, one index may show greater sensitivity and specificity in one population but is ineffective in another population. This study evaluated the diagnostic reliability of a combination of two red cell indexes [red blood cell (RBC) and red blood cell distribution width (RDW)] and nine formulas called '11T score' for differentiation of β-thal trait and iron deficiency anemia in the Thai population...
March 2017: Hemoglobin
https://www.readbyqxmd.com/read/28572880/effect-of-medicinal-mushrooms-on-blood-cells-under-conditions-of-diabetes-mellitus
#12
REVIEW
Taras Vitak, Borys Yurkiv, Solomon Wasser, Eviatar Nevo, Natalia Sybirna
Diabetes mellitus (DM) is the third most common non-infectious disease leading to early disability and high mortality. Moreover, the number of patients is growing every year. The main symptom of DM is hyperglycemia. Increased levels of blood glucose activate polyol, hexosamine, and protein kinase metabolic pathways cause the intensification of non-enzymatic glycosylation and nitration of macromolecules. This, in turn, leads to the development of oxidative and nitrative stresses and secondary complications, such as different kinds of micro- and macroangiopathies...
May 15, 2017: World Journal of Diabetes
https://www.readbyqxmd.com/read/28568743/interventions-for-treatment-and-or-prevention-of-alcohol-hangover-systematic-review
#13
REVIEW
Ranil Jayawardena, Thulasika Thejani, Priyanga Ranasinghe, Dinithi Fernando, Joris C Verster
OBJECTIVE: To evaluate new research conducted over the past few years (2009-2016) assessing the effectiveness of potentially curative and/or preventive methods of alcohol hangover. METHODS: Data were retrieved by a 4-stage systematic search process. A search of the online Pubmed and Scopus databases were performed, using a combination of keywords: "Alcohol," "Ethanol," and "C2 H5 OH," in combination with the terms "Hangover," "Treatment," and "Prevention." The search comprised studies listed between January 1, 2009 and June 30, 2016...
May 31, 2017: Human Psychopharmacology
https://www.readbyqxmd.com/read/28547651/photoplethysmography-for-blood-volumes-and-oxygenation-changes-during-intermittent-vascular-occlusions
#14
T Y Abay, P A Kyriacou
Photoplethysmography (PPG) is an optical technique that measures blood volume variations. The main application of dual-wavelength PPG is pulse oximetry, in which the arterial oxygen saturation (SpO[Formula: see text]) is calculated noninvasively. However, the PPG waveform contains other significant physiological information that can be used in conjunction to SpO[Formula: see text] for the assessment of oxygenation and blood volumes changes. This paper investigates the use of near infrared spectroscopy (NIRS) processing techniques for extracting relative concentration changes of oxygenated ([Formula: see text]HbO[Formula: see text]), reduced ([Formula: see text]HHb) and total haemoglobin ([Formula: see text]tHb) from dual-wavelength PPG signals during intermittent pressure-increasing vascular occlusions...
May 25, 2017: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/28529456/ethyl-acetate-fraction-of-huogu-formula-inhibits-adipogenic-differentiation-of-bone-marrow-stromal-cells-via-the-bmp-and-wnt-signaling-pathways
#15
Xiangying Kong, Xiaomin Li, Cun Zhang, Liuluan Zhu, Chunfang Liu, Qingxia Qin, Cuiling Liu, Qianqian Wang, Jia Zhu, Xuan Wu, Hongye Wan, Weiheng Chen, Na Lin
Elevated adipogenesis of bone marrow stromal cells (BMSCs) is closely associated with non-traumatic osteonecrosis of femoral head (ONFH). Our previous studies have shown that Huogu (HG) formula was effective both in clinic experience and experimental ONFH. How HG impacts the differentiation of BMSCs and what is the underlying molecular mechanism remain largely unknown. Our results showed that ethyl acetate extract of HG (HGE) significantly decreased the adipocyte differentiation as determined by oil red staining, while slightly increased the ALP activity...
2017: International Journal of Biological Sciences
https://www.readbyqxmd.com/read/28496982/blood-gases-biochemistry-and-haematology-of-gal%C3%A3-pagos-hawksbill-turtles-eretmochelys-imbricata
#16
Juan Pablo Muñoz-Pérez, Gregory A Lewbart, Maximilian Hirschfeld, Daniela Alarcón-Ruales, Judith Denkinger, Jason Guillermo Castañeda, Juan García, Kenneth J Lohmann
The hawksbill turtle, Eretmochelys imbricata, is a marine chelonian with a circum-global distribution, but the species is critically endangered and has nearly vanished from the eastern Pacific. Although reference blood parameter intervals have been published for many chelonian species and populations, including nesting Atlantic hawksbills, no such baseline biochemical and blood gas values have been reported for wild Pacific hawksbill turtles. Blood samples were drawn from eight hawksbill turtles captured in near shore foraging locations within the Galápagos archipelago over a period of four sequential years; three of these turtles were recaptured and sampled on multiple occasions...
2017: Conservation Physiology
https://www.readbyqxmd.com/read/28442566/bayesian-posteriors-for-arbitrarily-rare-events
#17
Drew Fudenberg, Kevin He, Lorens A Imhof
We study how much data a Bayesian observer needs to correctly infer the relative likelihoods of two events when both events are arbitrarily rare. Each period, either a blue die or a red die is tossed. The two dice land on side [Formula: see text] with unknown probabilities [Formula: see text] and [Formula: see text], which can be arbitrarily low. Given a data-generating process where [Formula: see text], we are interested in how much data are required to guarantee that with high probability the observer's Bayesian posterior mean for [Formula: see text] exceeds [Formula: see text] times that for [Formula: see text] If the prior densities for the two dice are positive on the interior of the parameter space and behave like power functions at the boundary, then for every [Formula: see text] there exists a finite [Formula: see text] so that the observer obtains such an inference after [Formula: see text] periods with probability at least [Formula: see text] whenever [Formula: see text] The condition on [Formula: see text] and [Formula: see text] is the best possible...
May 9, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28429933/remarkably-enhancing-green-excitation-efficiency-for-solar-energy-utilization-red-phosphors-ba2zns3-eu-2-x-co-doped-halide-ions-x-cl-br-i
#18
Tingting Luo, Yun Du, Zhongxian Qiu, Yanmei Li, Xiaofang Wang, Wenli Zhou, Jilin Zhang, Liping Yu, Shixun Lian
Eu(2+)-activated Ba2ZnS3 has been reported as a red phosphor with a broad emission band peaking at 650 nm under blue excitation for white-LED. In this study, Ba2ZnS3:Eu(2+), X(-) (X = F, Cl, Br, I) phosphors doped with halide ions were prepared by traditional high-temperature solid-state reaction. Phase identification of powders was performed by X-ray powder diffraction analysis, confirming the existence of single-phase Ba2ZnS3 crystals without dopant. The corresponding excitation spectra showed an additional broad band in the green region peaking at 550 nm when the phosphor was halogenated except by the smallest F(-)...
April 21, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28422904/a-comparison-of-prognosis-calculators-for-geriatric-trauma-a-prognostic-assessment-of-life-and-limitations-after-trauma-in-the-elderly-consortium-study
#19
COMPARATIVE STUDY
Tarik David Madni, Akpofure Peter Ekeh, Scott C Brakenridge, Karen J Brasel, Bellal Joseph, Kenji Inaba, Brandon R Bruns, Jeffrey D Kerby, Joseph Cuschieri, M Jane Mohler, Paul A Nakonezny, Audra Clark, Jonathan Imran, Steven E Wolf, M Elizabeth Paulk, Ramona L Rhodes, Herb A Phelan
BACKGROUND: The nine-center Prognostic Assessment of Life and Limitations After Trauma in the Elderly consortium has validated the Geriatric Trauma Outcome Score (GTOS) as a prognosis calculator for injured elders. We compared GTOS' performance to that of the Trauma Injury Severity Score (TRISS) in a multicenter sample. METHODS: Three Prognostic Assessment of Life and Limitations After Trauma in the Elderly centers not submitting subjects to the GTOS validation study identified subjects aged 65 years to 102 years admitted from 2000 to 2013...
July 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28400735/a-novel-stopped-flow-assay-for-quantitating-carbonic-anhydrase-activity-and-assessing-red-blood-cell-hemolysis
#20
Pan Zhao, R Ryan Geyer, Walter F Boron
We report a novel carbonic-anhydrase (CA) assay and its use for quantitating red-blood-cell (RBC) lysis during stopped-flow (SF) experiments. We combine two saline solutions, one containing HEPES/pH 7.03 and the other, ~1% CO2/44 mM [Formula: see text]/pH 8.41, to generate an out-of-equilibrium CO2/[Formula: see text] solution containing ~0.5% CO2/22 [Formula: see text]/pH ~7.25 (10°C) in the SF reaction cell. CA catalyzes relaxation of extracellular pH to ~7.50: [Formula: see text] + H(+) → CO2 + H2O. Proof-of-concept studies (no intact RBCs) show that the pH-relaxation rate constant (kΔpH)-measured via pyranine fluorescence-rises linearly with increases in [bovine CAII] or [murine-RBC lysate]...
2017: Frontiers in Physiology
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