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https://www.readbyqxmd.com/read/29777958/sssupramolecular-poly-acrylic-acid-f127-hydrogel-with-hydration-controlled-nitric-oxide-release-for-enhancing-wound-healing
#1
Mathilde Champeau, Valéria Póvoa, Lucas Militão, Flávia Cabrini, Guilherme F Picheth, Florian Meneau, Carlos P Jara, Eliana P de Araujo, Marcelo G de Oliveira
Topical nitric oxide (NO) delivery has been shown to accelerate wound healing. However, delivering NO to wounds at appropriate rates and doses requires new biomaterial-based strategies. Here, we describe the development of supramolecular interpolymer complex hydrogels comprising PEO-PPO-PEO (F127) micelles embedded in a poly(acrylic acid) (PAA) matrix, with S-nitrosoglutathione (GSNO) molecules dissolved in the hydrophilic domain. We show that PAA:F127/GSNO hydrogels start releasing NO upon hydration at rates controlled by their rates of water absorption...
May 16, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29777678/uva-riboflavin-collagen-crosslinking-stiffening-effects-on-anterior-and-posterior-corneal-flaps
#2
Hamed Hatami-Marbini, Sandeep M Jayaram
The UVA/riboflavin collagen crosslinking (CXL) is one of the treatment procedure for stopping the progression of keratoconus. The inclusion criterion for this procedure is a minimum corneal thickness of 400 μm, which is not often met in patients with advanced keratoconus. Preoperatively swelling of thin corneas was shown to stabilize the keratectasia without any postoperative endothelial damage. Recently, we have shown that swelling porcine corneas prior to the CXL treatment had no significant effect on the resulting improvement in their tensile properties...
May 16, 2018: Experimental Eye Research
https://www.readbyqxmd.com/read/29777328/a-systematic-review-on-the-off-label-use-of-montelukast-in-atopic-dermatitis-treatment
#3
Weng Khong Chin, Shaun Wen Huey Lee
Background Atopic dermatitis (AD) is the most common form of eczema. As leukotriene mediators are involved in the inflammatory phase of atopic dermatitis, montelukast has been suggested as a possible therapy. Aim of the review To evaluate the safety and efficacy of montelukast off-label use for the treatment atopic dermatitis. Method A search was performed from database inception until March 2018 in six electronic databases for randomized-controlled-trials examining the use of montelukast for AD. Results Among 301 articles screened, 11 studies met the inclusion criteria and were included in the review...
May 18, 2018: International Journal of Clinical Pharmacy
https://www.readbyqxmd.com/read/29777326/sirolimus-coated-poly-l-lactic-acid-modified-polypropylene-mesh-with-minimal-intra-peritoneal-adhesion-formation-in-a-rat-model
#4
S Lu, W Hu, Z Zhang, Z Ji, T Zhang
PURPOSE: This study evaluated the manufacturing method and anti-adhesion properties of a new composite mesh in the rat model, which was made from sirolimus (SRL) grafts on a poly(L-lactic acid) (PLLA)-modified polypropylene (PP) hernia mesh. METHODS: PLLA was first grafted onto argon-plasma-treated native PP mesh through catalysis of stannous chloride. SRL was grafted onto the surface of PP-PLLA meshes using catalysis of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDC) and 4-dimethylaminopyridine (DMAP) in a CH2 Cl2 solvent...
May 18, 2018: Hernia: the Journal of Hernias and Abdominal Wall Surgery
https://www.readbyqxmd.com/read/29776816/patterns-and-associations-of-structural-and-functional-cutaneous-responses-during-loading-at-heel-and-sacral-skin-in-aged-females-a-reanalysis-of-clinical-study-data
#5
Eva K B Pfannes, Ulrike Blume-Peytavi, Jan Kottner
AIM OF THE STUDY: The aim of this study was to explore possible interrelationships and cutaneous response patterns at the heel and sacral skin due to prolonged loading. MATERIALS AND METHODS: Skin stiffness, elasticity, roughness and transepidermal water loss, stratum corneum hydration, erythema, and temperature of n = 20 aged females (mean age 69.9 years) were measured before and after 90 and 150 min loading in supine position. Delta values were calculated and correlated using Spearman's rho...
May 10, 2018: Journal of Tissue Viability
https://www.readbyqxmd.com/read/29775841/cesium-desorption-behavior-of-weathered-biotite-in-fukushima-considering-the-actual-radioactive-contamination-level-of-soils
#6
Hiroki Mukai, Kenji Tamura, Ryosuke Kikuchi, Yoshio Takahashi, Tsuyoshi Yaita, Toshihiro Kogure
For the better understanding of radioactive contamination in Fukushima Prefecture at present and in future, Cs desorption experiments have been conducted mainly using weathered biotite (WB) collected from Fukushima Prefecture and considering the actual contamination level (∼10-10  wt%) of radiocesium in Fukushima Prefecture. In the experiments, 137 Cs sorbed to WB by immersing in 137 Cs solution for one day was mostly desorbed by solutions of 1 M NaNO3 , 1 M LiNO3 , 10-1  M HCl, and 10-1  M HNO3 , although it was barely desorbed by 1 M KNO3 , 1 M CsNO3 , 1 M NH4 NO3 , and natural seawater...
May 15, 2018: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/29775442/-copeptin-in-children-with-chronic-kidney-disease
#7
Piotr Skrzypczyk, Magdalena Okarska-Napierała, Elżbieta Górska, Anna Stelmaszczyk-Emmel, Małgorzata Pańczyk-Tomaszewska
Studies in adult patients suggest that copeptin (C-terminal fragment of antidiuretin propeptide) is related to kidney and cardiovascular diseases. AIM: The aim was to assess copeptin concentration in children with chronic kidney disease (CKD). MATERIALS AND METHODS: In a group of 38 children with CKD (age: from 4.70 to 18.00 mean 12.23±4.19 years) we evaluated: serum copeptin concentration [ng/mL], age, sex, etiology of CKD, presence of arterial hypertension (AH), medications, glomerular filtration rate (GFR), hemoglobin, calcium-phosphorus metabolism parameters, and lipids...
April 23, 2018: Polski Merkuriusz Lekarski: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/29774925/synthesis-of-n-dialkylamino-methyl-acrylamides-and-n-dialkylamino-methyl-methacrylamides-from-schiff-base-salts-useful-building-blocks-for-smart-polymers
#8
Abdullah Alzahrani, Styliana I Mirallai, Benjamin A Chalmers, Patrick McArdle, Fawaz Aldabbagh
The traditional thermal Mannich reaction is unsuitable for preparing polymerizable N-methylene amino substituted acrylamides and methacrylamides. Herein we provide a facile multi-gram high yield synthesis of these monomeric precursors to stimuli-responsive polymers by the addition of acrylamides and methacrylamides onto in situ generated or freshly isolated methylene Schiff base (iminium) salts. The X-ray crystal structure of the hydrated iminium salt, 1-(hydroxymethyl)azocan-1-ium chloride and monomer·HCl salt (N-[(azocan-1-yl)methyl]prop-2-enamide hydrochloride) is described...
May 18, 2018: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/29774822/partial-nephrectomy-in-central-renal-tumors
#9
Sohrab Arora, Craig Rogers
Nephron-sparing surgery, especially through a minimally invasive approach, is increasingly being performed for incidentally detected renal masses with excellent outcomes. Tumors in central location remain a surgical challenge during nephron-sparing surgery. In this chapter, we discuss the minimally invasive management of these tumors, which include complex hilar tumors and endophytic central tumors, with a focus on surgical technique. The key to management of these tumors is to maintain good preoperative hydration, achieving adequate exposure of tumor, and the use of intraoperative ultrasound to plan the resection plane...
May 2018: Journal of Endourology
https://www.readbyqxmd.com/read/29774742/dual-role-of-water-in-heterogeneous-catalytic-hydrolysis-of-sarin-by-zirconium-based-metal-organic-frameworks
#10
Mohammad R Momeni, Christopher J Cramer
Recent experimental studies on ZrIV-based metal-organic frameworks (MOFs) have shown the extraordinary effective-ness of these porous materials for the detoxification of phos-phorus-based chemical warfare agents (CWAs). However, pressing challenges remain with respect to characterizing these catalytic processes both at the molecular and crystalline lev-els. We here use theory to compare the reactivity of different zirconium-based MOFs for the catalytic hydrolysis of the CWA sarin, using both periodic and cluster modeling...
May 18, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29774636/formation-of-supramolecular-clusters-at-the-interface-of-zeolite-x-following-the-adsorption-of-rare-earth-cations-and-their-impact-on-the-macroscopic-properties-of-the-zeolite
#11
Roberta Guzzinati, Elena Sarti, Martina Catani, Valentina Costa, Antonella Pagnoni, Annalisa Martucci, Elisa Rodeghero, Donatella Capitani, Massimiliana Pietrantonio, Alberto Cavazzini, Luisa Pasti
The adsorption behavior of neodymium (Nd3+) and yttrium (Y3+) cations on synthetic FAU zeolite 13X in its sodium form (Na13X) has been investigated by means of an approach based on both macroscopic (namely, adsorption isotherm determination and thermal analysis) and microscopic measurements (including solid-state NMR spectroscopy and X-ray powder diffraction). The multidisciplinary study has revealed some unexpected features. Firstly, adsorption constants of cations are not correlated to their ionic radii (or hydration enthalpy)...
May 18, 2018: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/29773682/water-structure-changes-in-oxime-mediated-reactivation-process-of-phosphorylated-human-acetylcholinesterase
#12
Irina V Zueva, Sofya V Lushchekina, Patrick Masson
The role of water in oxime-mediated reactivation of phosphylated cholinesterases has been asked with recurrence. To investigate oximate water structure changes in this reaction, reactivation of paraoxon-inhibited human acetylcholinesterase (AChE) was performed by the oxime HI-6 at different pH in the presence and absence of lyotropic salts: a neutral salt (NaCl), a strong chaotropic salt (LiSCN) and strong kosmotropic salts (ammonium sulfate and phosphate HPO4 2- ). At the same time, molecular dynamic simulations of enzyme reactivation under the same conditions were performed over 100 ns...
May 17, 2018: Bioscience Reports
https://www.readbyqxmd.com/read/29772956/lumbar-muscle-structure-predicts-operational-postures-in-active-duty-marines
#13
David B Berry, Bahar Shahidi, Ana E Rodríguez-Soto, Jan M Hughes-Austin, Karen R Kelly, Samuel R Ward
Study Design Cross-sectional. Background The relationship between lumbar spine posture and muscle structure is not well understood. Objectives Investigate the predictive capacity of muscle structure on lumbar spine posture in active duty Marines. Methods Fouty-three Marines were scanned using an upright magnetic resonance imaging (MRI) scanner while standing unloaded and standing, sitting, and prone on elbows with body armor. Cobb, horizontal, and sacral angles were measured. Marines were then scanned unloaded in supine using a supine MRI scanner...
May 17, 2018: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/29772937/evaluation-of-sulphonamide-derivatives-acting-as-inhibitors-of-human-carbonic-anhydrase-isoforms-i-ii-and-mycobacterium-tuberculosis-%C3%AE-class-enzyme-rv3273
#14
Tanvi V Wani, Silvia Bua, Pravin S Khude, Abdul H Chowdhary, Claudiu T Supuran, Mrunmayee P Toraskar
A series of novel sulphonamide derivatives was obtained from sulphanilamide which was N4-alkylated with ethyl bromoacetate followed by reaction with hydrazine hydrate. The hydrazide obtained was further reacted with various aromatic aldehydes. The novel sulphonamides were characterised by infrared, mass spectrometry, 1 H- and 13 C-NMR and purity was determined by high-performance liquid chromatography (HPLC). Human (h) carbonic anhydrase (CA, EC 4.2.1.1) isoforms hCA I and II and Mycobacterium tuberculosis β-CA encoded by the gene Rv3273 (mtCA 3) inhibition activity was investigated with the synthesised compounds which showed promising inhibition...
December 2018: Journal of Enzyme Inhibition and Medicinal Chemistry
https://www.readbyqxmd.com/read/29772790/combined-effects-of-set-retarders-and-polymer-powder-on-the-properties-of-calcium-sulfoaluminate-blended-cement-systems
#15
Seongwoo Gwon, Seung Yup Jang, Myoungsu Shin
This study investigates the effects of set retarders on the properties of polymer-modified calcium sulfoaluminate (CSA) and Portland cement blend systems at early and long-term ages. The fast setting of the cement blend systems is typically adjusted by using retarders to ensure an adequate workability. However, how the addition of retarders influences the age-dependent characteristics of the cement blend systems was rarely investigated. This study particularly examines the effects of retarders on the microstructure and strength development of polymer-modified CSA and Portland cement blend pastes and mortars from 2 h to 90 days...
May 17, 2018: Materials
https://www.readbyqxmd.com/read/29772734/high-pressure-treatment-of-non-hydrated-flour-affects-structural-characteristics-and-hydration
#16
Sabina Jakobi, Mario Jekle, Thomas Becker
In recent years, high-pressure treatment (HPT) has become an established process concerning the preservation of food. However, studies dealing with the structural, and consequently functional modification of non-hydrated starchy matrices (moisture content ≤ 15%) by HPT are missing. To close this knowledge gap, pressure (0⁻600 MPa, 10 min) and pressurization time depending (0⁻20 min, 450 MPa) alterations of wheat flour were investigated. Pressure rise from 0 to 600 MPa or pressurization time rise from 0 to 20 min resulted in a decline of amylopectin content from 68...
May 16, 2018: Foods (Basel, Switzerland)
https://www.readbyqxmd.com/read/29771807/administration-of-an-oral-hydration-solution-prevents-electrolyte-and-fluid-disturbances-and-reduces-readmissions-in-patients-with-a-diverting-ileostomy-after-colorectal-surgery-a-prospective-randomized-controlled-trial
#17
Athanasios Migdanis, Georgios Koukoulis, Ioannis Mamaloudis, Ioannis Baloyiannis, Ioannis Migdanis, Maria Kanaki, Eleni Malissiova, Georgios Tzovaras
BACKGROUND: Patients with a newly formed ileostomy often develop electrolyte abnormalities and dehydration. OBJECTIVE: The study assessed the prophylactic effect of an isotonic hydration solution on dehydration and electrolyte abnormalities in patients with a newly formed ileostomy. DESIGN: This was a prospective, randomized, controlled trial (NCT02036346). SETTINGS: The study was conducted at a single surgical unit of a public university hospital...
May 15, 2018: Diseases of the Colon and Rectum
https://www.readbyqxmd.com/read/29771249/-new-italian-law-about-end-of-life-self-determination-and-shared-care-pathway
#18
Rosagemma Ciliberti, Matteo Gulino, Ilaria Gorini
The Italian Parliament has recently approved the Law n. 219/2017 concerning "Rules on informed consent and advance directives". The manuscript points out the main key points of the new law, in order to clarify the role of the advance directives and to provide clear operational guidelines for healthcare personnel. Taking into consideration the Italian deontological and juridical context, along with the main jurisprudential judgements, the law has been analysed. The Authors discussed the new rules and the bioethical issues also in relation to the provisions stated by the Convention on Human Rights and Biomedicine (Convention of Oviedo)...
May 2018: Recenti Progressi in Medicina
https://www.readbyqxmd.com/read/29771130/thermodynamics-of-mixing-primary-alkanolamines-with-water
#19
Abdenacer Idrissi, Pal Jedlovszky
The volume, energy, entropy, and Helmholtz free energy of mixing of the seven simplest primary alkanolamine molecules, i.e., MEA, MIPA, 2A1P, ABU, AMP, AMP2, and 1A2B with water is investigated by extensive computer simulations and thermodynamic integration. To check the force field dependence of the results, all calculations are repeated with two commonly used water models, namely SPC/E and TIP4P. The obtained results show that the thermodynamics of mixing of alkanolamines and water is largely independent from the type of the alkanolamine molecule...
May 17, 2018: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/29770709/lessons-learned-from-the-preserve-trial
#20
Sasan Partovi, Thomas Trischman, Preet S Kang
The recently published PRESERVE trial is presently the largest and most comprehensive clinical trial comparing commonly applied strategies for prevention of iodinated contrast-induced acute kidney injury in high-risk patients. The fundamental conclusion of the PRESERVE trial is that oral acetylcysteine and intravenous sodium bicarbonate are not superior to simple intravenous hydration with isotonic saline for the prevention of contrast-induced renal sequelae. In this commentary, we discuss the results in the context of selected past major trials, and provide insights into the strengths and potential weaknesses of the PRESERVE trial...
May 17, 2018: British Journal of Radiology
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