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https://www.readbyqxmd.com/read/28647864/bonding-of-composite-resins-to-peek-the-influence-of-adhesive-systems-and-air-abrasion-parameters
#1
Bogna Stawarczyk, Simon Taufall, Malgorzata Roos, Patrick R Schmidlin, Nina Lümkemann
OBJECTIVE: The objective of the study was to investigate the tensile bond strength (TBS) to polyaryletheretherketone (PEEK) after different pretreatment and conditioning methods. METHODS: Four hundred PEEK specimens were fabricated and allocated to the following air-abrasion methods (n 1 = 80/pretreatment): (i) 50 μm Al2O3 (0.05 MPa); (ii) 50 μm Al2O3 (0.35 MPa); (iii) 110 μm Al2O3 (0.05 MPa); (iv) 110 μm Al2O3 (0.35 MPa); and (v) Rocatec 110 μm (0...
June 24, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/28644007/cyclotides-as-tools-in-chemical-biology
#2
Simon J de Veer, Joachim Weidmann, David J Craik
Among the various molecules that plants produce for defense against pests and pathogens, cyclotides stand out as exceptionally stable and structurally unique. These ribosomally synthesized peptides are around 30 amino acids in size, and are stabilized by a head-to-tail cyclic peptide backbone and three disulfide bonds that form a cystine knot. They occur in certain plants of the Rubiaceae, Violaceae, Cucurbitaceae, Fabaceae, and Solanaceae families, with an individual plant producing up to hundreds of different cyclotides...
June 23, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28641429/fluids-in-porous-media-iv-quench-effect-on-chemical-potential
#3
C Z Qiao, S L Zhao, H L Liu, W Dong
It appears to be a common sense to measure the crowdedness of a fluid system by the densities of the species constituting it. In the present work, we show that this ceases to be valid for confined fluids under some conditions. A quite thorough investigation is made for a hard sphere (HS) fluid adsorbed in a hard sphere matrix (a quench-annealed system) and its corresponding equilibrium binary mixture. When fluid particles are larger than matrix particles, the quench-annealed system can appear much more crowded than its corresponding equilibrium binary mixture, i...
June 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28638923/-reconstitution-of-large-conductance-calcium-activated-potassium-channels-into-artificial-planar-lipid-bilayers
#4
Jun Cheng, Xiao-Rong Zeng, Xiao-Qiu Tan, Peng-Yun Li, Jing Wen, Liang Mao, Yan Yang
This study was aimed to establish a method to create a stable planar lipid bilayer membranes (PLBMs), in which large conductance calcium-activated potassium channels (BKCa) were reconstituted. Using spreading method, PLBMs were prepared by decane lipid fluid consisting of N2-weathered mixture of phosphatidylcholine and cholesterol at 3:1 ratio. After successful incorporation of BKCa channel into PLBMs, single channel characteristics of BKCa were studied by patch clamp method. The results showed that i) the single channel conductance of BKCa was (206...
June 25, 2017: Sheng Li Xue Bao: [Acta Physiologica Sinica]
https://www.readbyqxmd.com/read/28638278/lifespan-and-associated-factors-of-peripheral-intravenous-cannula-among-infants-admitted-in-public-hospitals-of-mekelle-city-tigray-ethiopia-2016
#5
Eskedar Birhane, Kalayou Kidanu, Mekuria Kassa, Dawit Gerezgiher, Lidia Tsegay, Brhanu Weldu, Genet Kidane, Hadgu Gerensea
BACKGROUND: Peripheral Intravenous cannula (IV) is the most common vascular access device used to administer medications with the exception of medication or fluid with high or low PH or hyperosmolarity which may cause severe damage to small veins. The insertion of a peripheral intravenous cannula in newborn infants can be difficult. Appropriate veins with sufficient capacity to insert a cannula become less available throughout the hospital stay. Once a peripheral intravenous cannula is inserted, it is desirable that its patency can be maintained as long as possible...
2017: BMC Nursing
https://www.readbyqxmd.com/read/28634555/a-rare-case-of-pneumopericardium-in-the-setting-of-tuberculous-constrictive-pericarditis
#6
Lauro L Abrahan Iv, Stephanie Martha O Obillos, Jaime Alfonso M Aherrera, Jose Donato A Magno, Celia Catherine C Uy-Agbayani, Ulysses King G Gopez, Jobelle Joyce Anne R Baldonado
A 28-year-old Filipino male was admitted due to high-grade fevers and dyspnea on a background of chronic cough and weight loss. Due to clinical and echocardiographic signs of cardiac tamponade, emergency pericardiocentesis was performed on his first hospital day. Five days after, chest radiographs showed new pockets of radiolucency within the cardiac shadow, indicative of pneumopericardium. On repeat echo, air microbubbles admixed with loculated effusion were visualized in the anterior pericardial space. Constrictive physiology was also supported by a thickened pericardium, septal bounce, exaggerated respiratory variation in AV valve inflow, and IVC plethora...
2017: Case Reports in Cardiology
https://www.readbyqxmd.com/read/28633090/pulmonary-and-cardiac-pathology-in-sudden-unexpected-death-in-epilepsy-sudep
#7
REVIEW
Fábio A Nascimento, Zian H Tseng, Cristian Palmiere, Joseph J Maleszewski, Takayuki Shiomi, Aileen McCrillis, Orrin Devinsky
OBJECTIVE: To review studies on structural pulmonary and cardiac changes in SUDEP cases as well as studies showing pulmonary or cardiac structural changes in living epilepsy patients. METHODS: We conducted electronic literature searches using the PubMed database for articles published in English, regardless of publication year, that included data on cardiac and/or pulmonary structural abnormalities in SUDEP cases or in living epilepsy patients during the postictal period...
June 17, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28629227/chemical-and-biological-studies-on-cichorium-intybus-l
#8
Dinara Satmbekova, Radhakrishnan Srivedavyasasri, Yerkebulan Orazbekov, Roza Omarova, Ubaidilla Datkhayev, Samir A Ross
Cichorium intybus L. (Asteraceae family) is a world-wide grown plant known as chicory. In traditional medicine, this plant is used as diuretic, anti-inflammatory, digestive, cardiotonic and liver tonic. Chromatographic purification of the supercritical fluid extract of aerial parts of C. intybus on silica gel column led to isolation of three compounds: new compound, 28β-hydroxytaraxasterol (I), and two known compounds usnic acid (II) and β-sitosterol (III). Purification of the ethanolic extract of aerial parts of this plant on silica gel column chromatography yielded four compounds: 1,3-dioleylglycerate (IV), sitoindoside II (V), 11β-13-dihydrolactucin (VI) and β-sitosterol-3-O-glucoside (VII)...
June 19, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28627816/spectrophotometric-determination-of-selenium-through-triiodide-anion
#9
Otilia Bizerea-Spiridon, Radu Nartita, Alexandru F Rogobete, Adina Negrea, Ramona Stroescu, Teofana O Bizerea, Constantin Ilie, Otilia Marginean
BACKGROUND: Selenium is a chemical element found in the human body that plays a crucial role in its regulation. Depending on the concentration, it may have beneficial or have toxic effects. Selenium is incorporated as selenocysteine amino acid residue in selenoproteins which play an important role in many biological functions: anti-oxidant defense, regulation of the immune function and of the inflammatory response, metabolism of thyroid hormones, functioning of the central nervous system, biosynthesis of DNA and RNA, fertility, and reproduction...
May 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28627469/modeling-and-comparison-of-release-profiles-effect-of-the-dissolution-method
#10
Sara Cascone
During the last decades, the study of the in vitro dissolution of pharmaceuticals has been strongly encouraged by the FDA in order to determine its relationship with the in vivo bioavailability of a drug. In this work immediate and extended release formulations containing diclofenac, a BCS class II drug, were studied using different dissolution methods. The release profiles obtained in USP Apparatus II and USP Apparatus IV were evaluated and compared to determine the effect of the fluid dynamic conditions on the release...
June 14, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28626868/intrathecal-dexamethasone-vs-meperidine-for-prevention-of-shivering-during-transurethral-prostatectomy-a-randomized-controlled-trial
#11
S M Moeen, A M Moeen
BACKGROUND: Shivering is a common complication after spinal anesthesia. Also, during transurethral prostatectomy a large amount of irrigating fluids is used which may cause hypothermia and shivering. We hypothesized that intrathecal dexamethasone could effectively attenuate post-spinal shivering following transurethral prostatectomy as intrathecal meperidine. METHODS: Ninety male patients, ASA II-III, 50-75 years old were included in this prospective and randomized double-blind study...
June 18, 2017: Acta Anaesthesiologica Scandinavica
https://www.readbyqxmd.com/read/28622216/the-clinical-picture-of-severe-systemic-capillary-leak-syndrome-episodes-requiring-icu-admission
#12
Marc Pineton de Chambrun, Charles-Edouard Luyt, François Beloncle, Marie Gousseff, Wladimir Mauhin, Laurent Argaud, Stanislas Ledochowski, Anne-Sophie Moreau, Romain Sonneville, Bruno Verdière, Sybille Merceron, Nathalie Zappella, Mickael Landais, Damien Contou, Alexandre Demoule, Sylvie Paulus, Bertrand Souweine, Bernard Lecomte, Antoine Vieillard-Baron, Nicolas Terzi, Elie Azoulay, Raymond Friolet, Marc Puidupin, Jérôme Devaquet, Jean-Marc Mazou, Yannick Fedun, Jean-Paul Mira, Jean-Herlé Raphalen, Alain Combes, Zahir Amoura
OBJECTIVE: Systemic capillary-leak syndrome is a very rare cause of recurrent hypovolemic shock. Few data are available on its clinical manifestations, laboratory findings, and outcomes of those patients requiring ICU admission. This study was undertaken to describe the clinical pictures and ICU management of severe systemic capillary-leak syndrome episodes. DESIGN, SETTING, PATIENTS: This multicenter retrospective analysis concerned patients entered in the European Clarkson's disease (EurêClark) Registry and admitted to ICUs between May 1992 and February 2016...
July 2017: Critical Care Medicine
https://www.readbyqxmd.com/read/28612423/chemiluminescence-selectivity-enhancement-in-the-on-chip-ru-bpy-3-2-system-the-potential-role-of-buffer-type-and-ph-in-the-determination-of-hydrochlorothiazide-in-combined-formulations-and-human-plasma
#13
Afsal Mohammed Kadavilpparampu, Haider A J Al Lawati, Fakhr Eldin O Suliman
A simple and highly selective on-chip Ru(bpy)3(2+) -oxidant chemiluminescence (CL) approach for estimation of a diuretic drug, hydrochlorothiazide (HCZ), in biological fluids was realized in the presence of other fixed-dose combination drugs by manipulating simultaneously the method of active species (Ru(bpy)3(3+) ) production and type of carrier buffer with pH used for the CL reaction. Chemical oxidation processes involved in the Ru(bpy)3(2+) -Ce(IV) CL system have been successfully miniaturised in this study using a microfabricated device to generate Ru(bpy)3(3+) instantaneously...
June 14, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
https://www.readbyqxmd.com/read/28608834/multi-dimensional-spectrum-effect-relationship-of-the-impact-of-chinese-herbal-formula-lichong-shengsui-yin-on-ovarian-cancer
#14
Yanhong Wang, Yang Li, Yan Zhang, Guan Feng, Zhixin Yang, Qingxia Guan, Rui Wang, Fengjuan Han
Lichong Shengsui Yin (LCSSY) is an effective and classic compound prescription of Traditional Chinese Medicines (TCMs) used for the treatment of ovarian cancer. To investigate its pharmacodynamic basis for treating ovarian cancer, the multi-dimensional spectrum-effect relationship was determined. Four compositions (I to IV) were obtained by extracting LCSSY successively with supercritical CO₂ fluid extraction, 75% ethanol reflux extraction, and the water extraction-ethanol precipitation method. Nine samples for pharmacological evaluation and fingerprint analysis were prepared by changing the content of the four compositions...
June 13, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28603715/contrast-induced-nephropathy-in-renal-transplant-recipients-a-single-center-experience
#15
Bassam G Abu Jawdeh, Anthony C Leonard, Yuvraj Sharma, Swapna Katipally, Adele R Shields, Rita R Alloway, E Steve Woodle, Charuhas V Thakar
BACKGROUND: Contrast-induced nephropathy (CIN) in native kidneys is associated with a significant increase in mortality and morbidity. Data regarding CIN in renal allografts are limited, however. We retrospectively studied CIN in renal allografts at our institution: its incidence, risk factors, and effect on long-term outcomes including allograft loss and death. METHODS: One hundred thirty-five renal transplant recipients undergoing 161 contrast-enhanced computed tomography (CT) scans or coronary angiograms (Cath) between years 2000 and 2014 were identified...
2017: Frontiers in Medicine
https://www.readbyqxmd.com/read/28602300/development-of-on-line-spectrofluorimetric-methodology-for-selenium-monitoring-in-foods-and-biological-fluids-using-chrome-azurol-s-quenching
#16
Débora G Santarossa, Liliana P Fernández
A novel, simple and accurate on-line green methodology for Se(IV) monitoring by molecular fluorescence has been developed. Because the analyte does not exhibit fluorescence, the organic dye Chrome azurol S (CAS) has been chosen to allow detection. The effect of metal-quenching on CAS excitation and emission conditions (λex=300nm; λem=407nm) was used as criterion for analyte quantification in presence of sodium cholate bile salt (NaC). The quenching mechanism was explored, and it can be classified as a collisional type with a Stern-Volmer constant value of 3...
September 1, 2017: Talanta
https://www.readbyqxmd.com/read/28599199/the-haemodynamic-effects-of-bolus-versus-slower-infusion-of-intravenous-crystalloid-in-healthy-volunteers
#17
Ida F Ukor, Andrew K Hilton, Michael J Bailey, Rinaldo Bellomo
PURPOSE: This pilot study aimed to characterise the haemodynamic effect of 1L of IV normal saline (NS) administered as a rapid versus slow infusion on cardiac output (CO), heart rate (HR), systemic blood pressures, and carotid blood flow in six healthy volunteers. MATERIALS AND METHODS: Six healthy male volunteers aged 18-65years were randomized to receive 1L NS given over 30min or 120min. On a subsequent study session the alternate fluid regimen was administered...
May 30, 2017: Journal of Critical Care
https://www.readbyqxmd.com/read/28592709/relationship-between-contrast-enhancement-of-the-perivascular-space-in-the-basal-ganglia-and-endolymphatic-volume-ratio
#18
Toshio Ohashi, Shinji Naganawa, Toshio Katagiri, Kayao Kuno
PURPOSE: We routinely obtain the endolymphatic hydrops (EH) image using heavily T2-weighted three dimensional-fluid attenuated inversion recovery (hT2w-3D-FLAIR) imaging at 4 hours after intravenous administration of a single-dose of gadolinium-based contrast media (IV-SD-GBCM). While repeating the examination, we speculated that the contrast enhancement of the perivascular space (PVS) in the basal ganglia might be related to the degree of EH. Therefore, the purpose of this study was to investigate the relationship between the endolymphatic volume ratio (%ELvolume) and the signal intensity of the PVS (SI-PVS)...
June 8, 2017: Magnetic Resonance in Medical Sciences: MRMS
https://www.readbyqxmd.com/read/28590353/proposed-clinical-pathway-for-non-operative-management-of-high-grade-pediatric-pancreatic-injuries-based-on-a-multicenter-analysis-a-pediatric-trauma-society-collaborative
#19
Bindi J Naik-Mathuria, Eric H Rosenfeld, Adam Vogel, Ankush Gosain, Randall Burd, Richard A Falcone, Rajan Thakkar, Barbara Gaines, David Mooney, Mauricio Escobar, Mubeen Jafri, Anthony Stallion, Denise B Klinkner, Robert Russell, Brendan Campbell, Rita V Burke, Jeffrey Upperman, David Juang, Shawn St Peter, Stephon J Fenton, Marianne Beaudin, Hale Wills, Stephanie Polites, Adam Pattyn, Christine Leeper, Laura V Veras, Ilan Maizlin, Shefali Thaker, Alexis Smith, Megan Waddell, Joseph Drews, James Gilmore, Lindsey Armstrong, Alexis Alex Ler, Suzanne Moody, Brandon Behrens, Laurence Carmant
BACKGROUND: Guidelines for non-operative management (NOM) of high-grade pancreatic injuries in children have not been established, and wide practice variability exists. The purpose of this study was to evaluate common clinical strategies across multiple pediatric trauma centers in order to develop a consensus-based standard clinical pathway. METHODS: A multicenter, retrospective review was conducted of children with high-grade (AAST grade III-V) pancreatic injuries treated with NOM between 2010-15...
June 6, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28582287/does-cleft-palate-width-correlate-with-veau-classification-and-outcome
#20
Robin Wu, Shayan Cheraghlou, Yassmin Parsaei, Roberto Travieso, Derek M Steinbacher
PURPOSE: Wider cleft palates are thought to be associated with increased complications and poorer outcomes following cleft palate repair. Objective cleft palate photographic measurement and assessment of complications have not been previously performed. The purpose of this study is to quantitatively characterize a series of cleft palate dimensions and to investigate possible correlations with Veau classification and intra-, peri-, and postoperative outcomes. METHODS: The analytic sample included primary cleft palate repairs performed by the senior author over a 2-year period...
June 2, 2017: Journal of Craniofacial Surgery
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