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https://www.readbyqxmd.com/read/29475151/ct-angiography-of-the-aorta-in-patients-with-marfan-disease-high-pitch-mdct-at-different-levels-of-tube-voltage-combined-with-sinogram-affirmed-iterative-reconstruction
#1
P Freyhardt, N Solowjowa, G Böning, J Kahn, B Aufmesser, P Haage, F Streitparth
OBJECTIVES: Aim of the study was the comparison of high-pitch dual-source CTA of the aorta acquired with different tube currents and methods of image reconstruction in patients with Marfan Disease (MFS). BACKGROUND: Patients with MFS receive repeatedly CT examinations of the entire aorta what leads to high cumulative lifetime radiation doses. Routine clinical use of low-kV-protocols in combination with iterative reconstruction for imaging of the aorta is still limited although this approach may be of great benefit for patients in need of serial follow-up scans...
February 15, 2018: Clinical Imaging
https://www.readbyqxmd.com/read/29475101/analyzing-%C3%AE-calpain-induced-proteolysis-in-a-myofibril-model-system-with-vibrational-and-fluorescence-spectroscopy
#2
Petter Vejle Andersen, Jens Petter Wold, Eva Veiseth-Kent
Degree of post-mortem proteolysis influences overall meat quality (e.g. tenderness and water holding capacity). Degradation of isolated pork myofibril proteins by μ-Calpain for 0, 15 or 45 min was analyzed using four spectroscopic techniques; Raman, Fourier transform infrared (FT-IR), near infrared (NIR) and fluorescence spectroscopy. Sodium dodecyl sulfate polyacrylamide gel electrophoresis was used to determine degree of proteolysis. The main changes detected by FT-IR and Raman spectroscopy were degradation of protein backbones manifested in the spectra as an increase in terminal carboxylic acid vibrations, a decrease in CN vibration, as well as an increase in skeletal vibrations...
February 10, 2018: Meat Science
https://www.readbyqxmd.com/read/29475035/nickel-cysteine-nanoparticles-synthesis-characterization-and-application-for-direct-electron-transfer-studies
#3
Ensiyeh Sharifi, Esmaeil Shams, Abdollah Salimi, Abdollah Noorbakhsh, Mohammad K Amini
Nickel-cysteine nanostructures (Ni-CysNSs) are prepared by a simple wet chemistry procedure under mild conditions, in which l-cysteine acts both as precursor and structure directing agent. This method involves the reaction of nickel chloride with l-cysteine, followed by simultaneous adjusting the pH in the range of 6-8.5 by addition of an aqueous NaOH solution. The structure and morphology of the prepared products are characterized using various techniques, including X-ray powder diffraction (XRD), Fourier transform-infrared (FT-IR) spectroscopy, CHNS elemental analysis, Field emission scanning electron microscopy (FESEM) and Transmission electron microscopy (TEM)...
January 31, 2018: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29474987/organic-and-inorganic-nano-fe-3-o-4-alga-ulva-flexuosa-based-synthesis-antimicrobial-effects-and-acute-toxicity-to-briny-water-rotifer-brachionus-rotundiformis
#4
Sakineh Mashjoor, Morteza Yousefzadi, Hossein Zolgharnain, Ehsan Kamrani, Mojtaba Alishahi
Following the recent progress in magnetic nanotechnology, concern over the optimal benefits and potential risks of iron oxide nanoparticles (Fe NPs), has increased. Hence, to minimize the negative impacts of inorganic Fe NPs, we report the phyco-synthesis and characterization of superparamagnetic Fe3 O4 NPs via reduction of ferric/ferrous chloride solution (2:1 M ratio; 88 °C) with green macroalga, Ulva flexuosa (wulfen) J.Agardh aqueous extract. The biogenic process is clean, eco-friendly, rapid, and facile to handle...
February 20, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29474936/adiposity-associated-changes-in-serum-glucose-and-adiponectin-levels-modulate-ovarian-steroidogenesis-during-delayed-embryonic-development-in-the-fruit-bat-cynopterus-sphinx
#5
Anuradha, Amitabh Krishna
The aim of the present study was to evaluate the mechanism by which embryonic development in Cynopterus sphinx is impaired during the period of increased accumulation of white adipose tissue during winter scarcity of food. The change in the mass of white adipose tissue during adipogenesis showed significant positive correlation with the circulating glucose level. But increase in circulating glucose level during the adipogenesis showed negative correlation with circulating progesterone and adiponectin levels...
February 20, 2018: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/29474918/dissecting-the-causal-mechanism-of-x-linked-dystonia-parkinsonism-by-integrating-genome-and-transcriptome-assembly
#6
Tatsiana Aneichyk, William T Hendriks, Rachita Yadav, David Shin, Dadi Gao, Christine A Vaine, Ryan L Collins, Aloysius Domingo, Benjamin Currall, Alexei Stortchevoi, Trisha Multhaupt-Buell, Ellen B Penney, Lilian Cruz, Jyotsna Dhakal, Harrison Brand, Carrie Hanscom, Caroline Antolik, Marisela Dy, Ashok Ragavendran, Jason Underwood, Stuart Cantsilieris, Katherine M Munson, Evan E Eichler, Patrick Acuña, Criscely Go, R Dominic G Jamora, Raymond L Rosales, Deanna M Church, Stephen R Williams, Sarah Garcia, Christine Klein, Ulrich Müller, Kirk C Wilhelmsen, H T Marc Timmers, Yechiam Sapir, Brian J Wainger, Daniel Henderson, Naoto Ito, Neil Weisenfeld, David Jaffe, Nutan Sharma, Xandra O Breakefield, Laurie J Ozelius, D Cristopher Bragg, Michael E Talkowski
X-linked Dystonia-Parkinsonism (XDP) is a Mendelian neurodegenerative disease that is endemic to the Philippines and is associated with a founder haplotype. We integrated multiple genome and transcriptome assembly technologies to narrow the causal mutation to the TAF1 locus, which included a SINE-VNTR-Alu (SVA) retrotransposition into intron 32 of the gene. Transcriptome analyses identified decreased expression of the canonical cTAF1 transcript among XDP probands, and de novo assembly across multiple pluripotent stem-cell-derived neuronal lineages discovered aberrant TAF1 transcription that involved alternative splicing and intron retention (IR) in proximity to the SVA that was anti-correlated with overall TAF1 expression...
February 22, 2018: Cell
https://www.readbyqxmd.com/read/29474520/stability-indicating-rp-hplc-method-for-estimation-of-potential-impurities-in-ledipasvir-and-characterization-of-a-new-degradation-impurity
#7
R Siva Kumar, K V Sravan Kumar, L Kondareddy, K R Yogeshwara, Gangrade Manish, Jayachandran Jeenet, Kanyawar Nitesh
A new sensitive and stability indicating reverse phase high-performance liquid chromatography method has been developed for the quantitative determination of potential impurities of Ledipasvir, active pharmaceutical ingredient. Efficient chromatographic separation was achieved on waters × select column contains C18 stationary phase in gradient mode, quantitation at wavelength of 325 nm and mobile phase A is 50 mM ammonium formate pH 3.5 and mobile phase B is acetonitrile with flow rate 1.2 mL. The method was validated according to International Council for Hormonisation guideline, linearity studies has shown correlation coefficient value greater than 0...
February 21, 2018: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/29474515/validated-stability-indicating-high-performance-liquid-chromatographic-determination-of-lesinurad
#8
Khalid A M Attia, Nasr M El-Abasawi, Ahmed El-Olemy, Ahmed H Abdelazim
Lesinurad is a novel selective uric acid reabsorption inhibitor which has been newly approved for the treatment of the chronic gout. The behavior of lesinurad under various stress conditions (hydrolysis, oxidation, thermal and photolysis) has been investigated as per ICH guidelines. The drug has been found to be labile to acidic hydrolysis, basic hydrolysis and oxidation but stable in neutral, thermal and photolytic conditions. A high performance liquid chromatographic method has been developed for selective determination of the studied drug in the presence of its related degradation products...
February 21, 2018: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/29474385/influence-of-diabetes-mellitus-duration-on-the-efficacy-of-ischemic-preconditioning-in-a-zucker-diabetic-fatty-rat-model
#9
Marie Vognstoft Hjortbak, Johanne Hjort, Jonas Agerlund Povlsen, Rebekka Vibjerg Jensen, Nicolaj Brejnholdt Støttrup, Mia R Laursen, Nichlas Riise Jespersen, Bo Løfgren, Hans Erik Bøtker
Augmented mortality and morbidity following an acute myocardial infarction in patients with diabetes mellitus Type 2 (T2DM) may be caused by increased sensitivity to ischemia reperfusion (IR) injury or altered activation of endogenous cardioprotective pathways modified by T2DM per se or ischemic preconditioning (IPC). We aimed to investigate, whether the duration of T2DM influences sensitivity against IR injury and the efficacy of IPC, and how myocardial glucose oxidation rate was involved. Male Zucker diabetic fatty rats (homozygote (fa/fa)) at ages 6-(prediabetic), 12- (onset diabetes) and 24-weeks of age (late diabetes) and their age-matched non-diabetic controls (heterozygote (fa/+) were subjected to IR injury in the Langendorff model and randomised to IPC stimulus or control...
2018: PloS One
https://www.readbyqxmd.com/read/29474186/local-bi-o-bonds-correlated-with-infrared-emission-properties-in-triply-doped-gd-2-95-yb-0-02-bi-0-02-er-0-01-ga-5-o-12-via-temperature-dependent-raman-spectra-and-x-ray-absorption-fine-structure-analysis
#10
Liping Tong, Katsuhiko Saito, Qixin Guo, Han Zhou, Xingmei Guo, Tongxiang Fan, Di Zhang
A correlation function between the Raman intensities and the nearest-neighbor mean-square relative displacement (MSRD) [Formula: see text] of local Bi-O bonds is successfully established based on x-ray absorption fine structure (XAFS) and temperature-dependent Raman spectra in the temperature range 77-300 K in amorphous and crystalline Gd2.95 Yb0.02 Bi0.02 Er0.01 Ga5 O12 . The structural symmetries of Gd2.95 Yb0.02 Bi0.02 Er0.01 Ga5 O12 are described by using [Formula: see text] of local Bi-O bonds. More importantly, Gd2...
February 23, 2018: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/29474071/identification-of-gibberellic-acid-derivatives-that-deregulate-cholesterol-metabolism-in-prostate-cancer-cells
#11
Folake A Egbewande, Martin C Sadowski, Claire Levrier, Kaylyn D Tousignant, Jonathan M White, Mark J Coster, Colleen C Nelson, Rohan A Davis
The naturally occurring pentacyclic diterpenoid gibberellic acid (1) was used in the generation of a drug-like amide library using parallel-solution-phase synthesis. Prior to the synthesis, a virtual library was generated and prioritized based on drug-like physicochemical parameters such as log P, hydrogen bond donor/acceptor counts, and molecular weight. The structures of the synthesized analogues (2-13) were elucidated following analysis of the NMR, MS, UV, and IR data. Compound 12 afforded crystalline material, and its structure was confirmed by X-ray crystallographic analysis...
February 23, 2018: Journal of Natural Products
https://www.readbyqxmd.com/read/29473983/biofilm-inhibitory-efficiency-of-phytol-in-combination-with-cefotaxime-against-nosocomial-pathogen-acinetobacter-baumannii
#12
Srinivasan Ramanathan, Kannappan Arunachalam, Sivasankar Chandran, Rathika Selvaraj, Karutha Pandian Shunmugiah, Veera Ravi Arumugam
AIMS: This study aimed to evaluate the antibiofilm potential of phytol and cefotaxime combinations (PCCs) against A. baumannii and to elucidate the molecular mechanism of their antibiofilm potential through the transcriptomic approach. METHODS AND RESULTS: Phytol and cefotaxime combination(s) (PCC(s) [160 μg ml-1 + 8 μg ml-1 for microbial type culture collection (MTCC) strain and 160 μg ml-1 + 0.5 μg ml-1 for clinical isolate] effectively inhibited the A. baumannii biofilm formation...
February 23, 2018: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/29473933/assessment-of-genetic-integrity-splenic-phagocytosis-and-cell-death-potential-of-z-4-1-5-dimethyl-3-oxo-2-phenyl-2-3dihydro-1h-pyrazol-4-yl-amino-4-oxobut-2-enoic-acid-and-its-effect-when-combined-with-commercial-chemotherapeutics
#13
Rodrigo Juliano Oliveira, Naiara da Cruz Leite Santos, João Renato Pesarini, Beatriz Carneiro de Oliveira, Claudia Rodrigues Berno, Flávio Henrique Souza de Araújo, Ingridhy Ostaciana Maia Freitas da Silveira, Raquel Oliveira Nascimento, Andréia Conceição Milan Brochado Antoniolli-Silva, Antônio Carlos Duenhas Monreal, Adilson Beatriz, Dênis Pires de Lima, Roberto da Silva Gomes
The increased incidence of cancer and its high treatment costs have encouraged the search for new compounds to be used in adjuvant therapies for this disease. This study discloses the synthesis of (Z)-4-((1,5-dimethyl-3-oxo-2-phenyl-2,3dihydro-1H-pyrazol-4-yl) amino)-4-oxobut-2-enoic acid (IR-01) and evaluates not only the action of this compound on genetic integrity, increase in splenic phagocytosis and induction of cell death but also its effects in combination with the commercial chemotherapeutic agents doxorubicin, cisplatin and cyclophosphamide...
February 19, 2018: Genetics and Molecular Biology
https://www.readbyqxmd.com/read/29473848/bovine-%C3%AE-lactalbumin-hydrolysates-%C3%AE-lah-ameliorate-adipose-insulin-resistance-and-inflammation-in-high-fat-diet-fed-c57bl-6j-mice
#14
Jing Gao, Jiajia Song, Min Du, Xueying Mao
Obesity-induced adipose inflammation has been demonstrated to be a key cause of insulin resistance. Peptides derived from bovine α-lactalbumin have been shown to inhibit the activities of dipeptidyl peptidase IV (DPP-IV) and angiotensin converting enzyme (ACE), scavenge 2,2'-azinobis [3-ethylbenzothiazoline-6-sulfonate] (ABTS⁺) radical and stimulate glucagon-like peptide-2 secretion. In the present study, the effects of bovine α-lactalbumin hydrolysates (α-LAH) on adipose insulin resistance and inflammation induced by high-fat diet (HFD) were investigated...
February 23, 2018: Nutrients
https://www.readbyqxmd.com/read/29473842/antioxidant-activity-and-protective-effects-of-enzyme-extracted-oudemansiella-radiata-polysaccharides-on-alcohol-induced-liver-injury
#15
Xiuxiu Wang, Min Liu, Chen Zhang, Shangshang Li, Qihang Yang, Jianjun Zhang, Zhiyuan Gong, Jiandong Han, Le Jia
This work was to examine the antioxidation in vitro and hepatoprotective effects of enzyme-extracted Oudemansiella radiata polysaccharides (En-OPS) on alcohol-induced liver damage in mice. The antioxidant activities were determined according to the scavenging effects of En-OPS on hydroxyl, superoxide, and 1,1-diphenyl-2-picrylhydrazyl (DPPH) radicals, and the level of reducing power. En-OPS showed hepatoprotective activities on decreasing the serum levels of aspertate aminotransferase (AST), alamine aminotransferase (ALT), and alkaline phosphatase (ALP), as well as hepatic lipid levels of total cholesterol (TC) and triacylglycerols (TG)...
February 23, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29473499/natural-aristolochia-alkaloid-aristololactam-%C3%AE-d-glucoside-interaction-with-biomacromolecules-and-correlation-to-the-biological-perspectives
#16
Abhi Das, Gopinatha Suresh Kumar
Backgound: Natural aristolochia alkaloids have attracted the attention of both chemists and biologists from the stand point of their structural and pharmacological aspects. Many of the compounds isolated in this group are potent tumor inhibitors. These are divided into nitrophenanthrinic acid, phenanthrene lactams and isoquinoline alkaloids. A number of structure-activity studies have been performed on aristolochia alkaloids. Of particular interest is the molecule with the β-D-glucoside moiety that has similarity to the clinical anticancer agent daunomycin...
February 22, 2018: Mini Reviews in Medicinal Chemistry
https://www.readbyqxmd.com/read/29473275/design-synthesis-and-application-of-novel-chiral-c2-symmetric-spiroketal-containing-ligands-in-transition-metal-catalysis
#17
Alonso J Argüelles, Siyuan Sun, Brenna Budaitis, Pavel Nagorny
We present an expedient and economical route to a new spiroketal-based C2-symmetric chiral scaffold termed SPIROL. Based on this spirocyclic scaffold, several chiral ligands were generated and successfully employed in an array of stereoselective transformations including Ir-catalyzed hydroarylation (up to 95% ee), Pd-catalyzed allylic alkylation (up to 97% ee), intermolecular Pd-catalyzed Heck reaction (up to 95% ee), and Rh-catalyzed hydrogenations of dehydroalanine (up to 93% ee).
February 22, 2018: Angewandte Chemie
https://www.readbyqxmd.com/read/29473115/the-effects-of-exercise-training-associated-with-low-level-laser-therapy-on-biomarkers-of-adipose-tissue-transdifferentiation-in-obese-women
#18
Raquel Munhoz da Silveira Campos, Ana Raimunda Dâmaso, Deborah Cristina Landi Masquio, Fernanda Oliveira Duarte, Marcela Sene-Fiorese, Antonio Eduardo Aquino, Filippo Aragão Savioli, Pamela Cristina Lopes Quintiliano, Ana Claudia Pelissari Kravchychyn, Liliane Isabel Guimarães, Lian Tock, Lila Missae Oyama, Valter Tadeu Boldarine, Vanderlei Salvador Bagnato, Nivaldo Antonio Parizotto
Investigations suggest the benefits of low-level laser therapy (LLLT) to improve noninvasive body contouring treatments, inflammation, insulin resistance and to reduce body fat. However, the mechanism for such potential effects in association with exercise training (ET) and possible implications in browning adiposity processes remains unclear. Forty-nine obese women were involved, aged between 20 and 40 years with a body mass index (BMI) of 30-40 kg/m2 . The volunteers were divided into Phototherapy (808 nm) and SHAM groups...
February 23, 2018: Lasers in Medical Science
https://www.readbyqxmd.com/read/29473073/insights-from-ion-mobility-mass-spectrometry-infrared-spectroscopy-and-molecular-dynamics-simulations-on-nicotinamide-adenine-dinucleotide-structural-dynamics-nad-vs-nadh
#19
Juan Camilo Molano-Arevalo, Walter Gonzalez, Kevin Jeanne Dit Fouque, Jaroslava Miksovska, Philippe Maitre, Francisco Fernandez-Lima
Nicotinamide adenine dinucleotide (NAD) is found in all living cells where the oxidized (NAD+ ) and reduced (NADH) forms play important roles in many enzymatic reactions. However, little is known about NAD+ and NADH conformational changes and kinetics as a function of the cell environment. In the present work, an analytical workflow is utilized to study NAD+ and NADH dynamics as a function of the organic content in solution using fluorescence lifetime spectroscopy and in the gas-phase using trapped ion mobility spectrometry coupled to mass spectrometry (TIMS-MS) and infrared multiple photon dissociation (IRMPD) spectroscopy...
February 23, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29472787/kinetics-and-mathematical-modeling-of-infrared-thin-layer-drying-of-garlic-slices
#20
Mahmoud Younis, Diaeldin Abdelkarim, Assem Zein El-Abdein
Drying of garlic slices in thin-layer have been studied with Infrared (IR) at 0.075, 0.15, 0.225 and 0.3 W cm-2 radiation intensity and 0.75 and 1.25 m s-1 air flow velocity. The results showed increasing in drying rate and decreasing at the time of drying with decreasing air flow velocity and increasing IR radiation intensity. The effective moisture diffusivity (Deff ) was obtained using Fick's diffusion equation and its mean values ranged between 5.83×10-11 and 7.66×10-10 m2  s-1 for all investigated conditions...
February 2018: Saudi Journal of Biological Sciences
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