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https://www.readbyqxmd.com/read/29150635/one-pot-synthesis-of-trifunctional-chitosan-edta-%C3%AE-cyclodextrin-polymer-for-simultaneous-removal-of-metals-and-organic-micropollutants
#1
Feiping Zhao, Eveliina Repo, Dulin Yin, Li Chen, Simo Kalliola, Juntao Tang, Evgenia Iakovleva, Kam Chiu Tam, Mika Sillanpää
The global contamination of water resources with inorganic and organic micropollutants, such as metals and pharmaceuticals, poses a critical threat to the environment and human health. Herein, we report on a bio-derived chitosan-EDTA-β-cyclodextrin (CS-ED-CD) trifunctional adsorbent fabricated via a facile and green one-pot synthesis method using EDTA as a cross-linker, for the adsorption of toxic metals and organic micropollutants from wastewater. In this system, chitosan chain is considered as the backbone, and the immobilized cyclodextrin cavities capture the organic compounds via host-guest inclusion complexation, while EDTA-groups complex metals...
November 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29150470/platelet-rich-plasma-in-achilles-tendon-healing-2-path-2-trial-protocol-for-a-multicentre-participant-and-assessor-blinded-parallel-group-randomised-clinical-trial-comparing-platelet-rich-plasma-prp-injection-versus-placebo-injection-for-achilles-tendon-rupture
#2
Joseph Alsousou, David J Keene, Philippa A Hulley, Paul Harrison, Susan Wagland, Christopher Byrne, Michael Maia Schlüssel, Susan J Dutton, Sarah E Lamb, Keith Willett
BACKGROUND: Achilles tendon injuries give rise to substantial long-lasting morbidity and pose considerable challenges for clinicians and patients during the lengthy healing period. Current treatment strategies struggle to curb the burden of this injury on health systems and society due to lengthy rehabilitation, work absence and reinjury risk. Platelet-rich plasma (PRP) is an autologous preparation that has been shown to improve the mechanobiological properties of tendons in laboratory and animal studies...
November 16, 2017: BMJ Open
https://www.readbyqxmd.com/read/29150134/stress-generation-in-mandibular-anterior-teeth-restored-with-different-types-of-post-and-core-at-various-levels-of-ferrule
#3
Anatolii Savychuk, Marianthi Manda, Christos Galanis, Christofer Provatidis, Petros Koidis
STATEMENT OF PROBLEM: Pertinent evidence regarding the mechanical integrity of mandibular anterior teeth restored with a post-and-core is limited. PURPOSE: The purpose of this finite element analysis study was to compare the impact of the post type (glass fiber post-and-resin core or cast post-and-core) along with the ferrule effect on the stress fields generated in endodontically treated mandibular lateral incisors and canines. MATERIAL AND METHODS: Three-dimensional models of the segmented mandible were developed...
November 15, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29150133/effect-of-coloring-and-sintering-on-the-translucency-and-biaxial-strength-of-monolithic-zirconia
#4
Nazmiye Sen, Ibrahim Bülent Sermet, Sevki Cinar
STATEMENT OF PROBLEM: The influences of coloring and sintering procedures on the optical and mechanical properties of monolithic zirconia have not been thoroughly investigated. PURPOSE: The purpose of this in vitro study was to investigate the effects of the coloring procedure and of varying final sintering temperatures on the translucency parameter (TP) and biaxial flexural strength (BFS) of monolithic zirconia. MATERIAL AND METHODS: Disk-shaped specimens (N=210) of 2 different monolithic zirconia brands (Vita YZ HT(White) [VYZa]; Vita YZ HT(Color) A2 [VYZb]; Prettau Zirkonzahn [PZ]; Prettau Anterior Zirkonzahn [PZA]) with a diameter of 15 mm and a thickness of 1...
November 15, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29149694/a-high-brightness-probe-of-polymer-nanoparticles-for-biological-imaging
#5
Sirong Zhou, Jiarong Zhu, Yaping Li, Liheng Feng
Conjugated polymer nanoparticles (CPNs) with high brightness in long wavelength region were prepared by the nano-precipitation method. Based on fluorescence resonance energy transfer (FRET) mechanism, the high brightness property of the CPNs was realized by four different emission polymers. Dynamic light scattering (DLS) and scanning electron microscopy (SEM) displayed that the CPNs possessed a spherical structure and an average diameter of ~75nm. Analysis assays showed that the CPNs had excellent biocompatibility, good photostability and low cytotoxicity...
November 11, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29149638/roles-of-n-and-c-terminal-domains-in-the-ligand-binding-properties-of-cytoglobin
#6
Shumpei Hanai, Hirofumi Tsujino, Taku Yamashita, Ryo Torii, Hitomi Sawai, Yoshitsugu Shiro, Koji Oohora, Takashi Hayashi, Tadayuki Uno
Cytoglobin (Cygb) is a member of the hexacoordinated globin protein family and is expressed ubiquitously in rat and human tissues. Although Cygb is reportedly upregulated under hypoxic conditions both in vivo and in vitro, suggesting a physiological function to protect cells under hypoxic/ischemic conditions by scavenging reactive oxygen species or by signal transduction, the mechanisms associated with this function have not been fully elucidated. Recent studies comparing Cygbs among several species suggest that mammalian Cygbs show a distinctly longer C-terminal domain potentially involved in unique physiological functions...
November 9, 2017: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/29149558/quantification-of-humic-substances-in-natural-water-using-nitrogen-doped-carbon-dots
#7
Yan-Fang Guan, Bao-Cheng Huang, Chen Qian, Han-Qing Yu
Dissolved organic matter (DOM) is ubiquitous in aqueous environments and plays a significant role in pollutant mitigation, transformation and organic geochemical circulation. DOM is also capable of forming carcinogenic by-products in the disinfection treatment processes of drinking water. Thus, efficient methods for DOM quantification are highly desired. In this work, a novel sensor for rapid and selective detection of humic substances (HS), a key component of DOM, based on fluorescence quenching of nitrogen-doped carbon quantum dots was developed...
November 17, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29149057/effects-of-surfactants-on-the-preparation-of-nanocellulose-pla-composites
#8
Kirsi Immonen, Panu Lahtinen, Jaakko Pere
Thermoplastic composite materials containing wood fibers are gaining increasing interest in the manufacturing industry. One approach is to use nano- or micro-size cellulosic fibrils as additives and to improve the mechanical properties obtainable with only small fibril loadings by exploiting the high aspect ratio and surface area of nanocellulose. In this study, we used four different wood cellulose-based materials in a thermoplastic polylactide (PLA) matrix: cellulose nanofibrils produced from softwood kraft pulp (CNF) and dissolving pulp (CNFSD), enzymatically prepared high-consistency nanocellulose (HefCel) and microcellulose (MC) together with long alkyl chain dispersion-improving agents...
November 17, 2017: Bioengineering
https://www.readbyqxmd.com/read/29148914/marginal-gap-formation-in-approximal-bulk-fill-resin-composite-restorations-after-artificial-ageing
#9
A Peutzfeldt, S Mühlebach, A Lussi, S Flury
The aim of this in vitro study was to investigate the marginal gap formation of a packable "regular" resin composite (Filtek Supreme XTE [3M ESPE]) and two flowable "bulk fill" resin composites (Filtek Bulk Fill [3M ESPE] and SDR [DENTSPLY DeTrey]) along the approximal margins of Class II restorations. In each of 39 extracted human molars (n=13 per resin composite), mesial and distal Class II cavities were prepared, placing the gingival margins below the cemento-enamel junction. The cavities were restored with the adhesive system OptiBond FL (Kerr) and one of the three resin composites...
November 17, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/29148846/preparation-and-evaluation-of-curcumin-loaded-self-assembled-micelles
#10
Lu-Lu Wang, Dan-Dan He, Shu-Xia Wang, Yun-Hao Dai, Jian-Ming Ju, Cheng-Lei Zhao
Objective Curcumin being used to treat various chronic diseases while its poor bioavailability issue limited its wide clinical application as a therapeutic agent. The aim of this work was to prepare curcumin-loaded self-assembled micelles using soluplus and solutol®HS15 (SSCMs) to enhance curcumin's solubility and thus oral bioavailability. Methods Optimum formulation was investigated and the optimized ratio of drugs and excipients was obtained and the SSCMs were prepared via ethanol solvent evaporation method...
November 17, 2017: Drug Development and Industrial Pharmacy
https://www.readbyqxmd.com/read/29148749/glycosyl-cross-coupling-of-anomeric-nucleophiles-scope-mechanism-and-applications-in-the-synthesis-of-aryl-c-glycosides
#11
Feng Zhu, Jacob Rodriguez, Tianyi Yang, Ilia Kevlishvili, Eric Miller, Duk Yi, Sloane O'Neill, Michael Rourke, Peng Liu, Maciej A Walczak
Stereoselective manipulations at the C1 anomeric position of saccharides are one of the central goals of preparative carbohydrate chemistry. Historically, the majority of reactions forming a bond with anomeric carbon has focused on reactions of nucleophiles with saccharide donors equipped with a leaving group. Here, we describe a novel approach to stereoselective synthesis of C-aryl glycosides capitalizing on the highly stereospecific reaction of anomeric nucleophiles. First, methods for the preparation of anomeric stannanes have been developed and optimized to afford both anomers of common saccharides in high anomeric selectivities...
November 17, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29148721/ratiometric-fluorescence-sensing-and-real-time-detection-of-wa-ter-in-organic-solvents-with-one-pot-synthesis-of-ru-mil-101-al-nh2
#12
Hua-Qing Yin, Jichun Yang, Xue-Bo Yin
Ratiometric fluorescence detection attracts much attention because of its decreased environment influence and easy-to-differentiate color and intensity change. Herein, a guest-encapsulation metal organic framework (MOF), Ru@MIL-NH2, is prepared with 2-aminoterephthalic acid, AlCl3, and Ru(bpy)32+ by simple one-pot method for ratiometric fluorescence sensing of water in organic solvents. The rational selection of excitation wavelength provides dual emission at 465 and 615 nm from Ru@MIL-NH2 under single excitation of 300 nm...
November 17, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/29148701/metal-organic-framework-derived-metal-oxide-embedded-in-nitrogen-doped-graphene-network-for-high-performance-lithium-ion-batteries
#13
Zhu-Yin Sui, Pei-Ying Zhang, Meng-Ying Xu, Yuwen Liu, Zhi-Xiang Wei, Bao-Hang Han
Metal-organic frameworks (MOFs) are hybrid inorganic-organic materials that can be used as effective precursors to prepare various functional nanomaterials for energy-related applications. Nevertheless, most MOF-derived metal oxides exhibit low electrical conductivity and mechanical strain. These characteristics limit their electrochemical performance and hamper their practical application. Herein, we report a rational strategy for enhancing the lithium storage performance of MOF-derived metal oxide. The hierarchically porous Co3O4@NGN is successfully prepared by embedding ZIF-67-derived Co3O4 particles in a nitrogen-doped graphene network (NGN)...
November 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29148294/synthesis-physiochemical-property-and-antimicrobial-activity-of-novel-quaternary-ammonium-salts
#14
Xianrui Xie, Wei Cong, Feng Zhao, Hongjuan Li, Wenyu Xin, Guige Hou, Chunhua Wang
Twenty-four novel 5-phenyl-1,3,4-oxadiazole-2-thiol (POT) analogues, benzo[d]oxazole-2-thiol, benzo[d]thiazole-2-thiol and 5-methyl-1,3,4-thiadiazole-2-thiol-substituted N,N-bis(2-hydroxyethyl) quaternary ammonium salts (QAS) (5a-d, 6a-d, 7a-d, 10a-d, 13a-d, 16a-d) were prepared and characterised by FTIR, NMR and elemental analysis. Part of target compounds (5d, 6d, 7d, 10d, 13d, 16d) displayed potent antimicrobial effect against ten common pathogens (S. aureus, α-H-tococcus, β-H-tococcus, E. coli, P. aeruginosa, Proteus vulgaris, Canidia Albicans, Cytospora mandshurica, Physalospora piricola, Aspergillus niger) and had relatively low cytotoxity against two human cell lines (HaCat and LO2)...
December 2018: Journal of Enzyme Inhibition and Medicinal Chemistry
https://www.readbyqxmd.com/read/29147745/steroid-hormone-profiling-in-human-breast-adipose-tissue-using-semi-automated-purification-and-highly-sensitive-determination-of-estrogens-by-gc-apci-ms-ms
#15
Kristin Hennig, Jean Philippe Antignac, Emmanuelle Bichon, Marie-Line Morvan, Isabelle Miran, Suzette Delaloge, Jean Feunteun, Bruno Le Bizec
Body mass index is a known breast cancer risk factor due to, among other mechanisms, adipose-derived hormones. We developed a method for steroid hormone profiling in adipose tissue to evaluate healthy tissue around the tumor and define new biomarkers for cancer development. A semi-automated sample preparation method based on gel permeation chromatography and subsequent derivatization with trimethylsilyl (TMS) is presented. Progestagens and androgens were determined by GC-EI-MS/MS (LOQ 0.5 to 10 ng/g lipids)...
November 16, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/29147508/chiral-nanoprobes-for-targeting-and-long-term-imaging-of-the-golgi-apparatus
#16
Rong Sheng Li, Peng Fei Gao, Hong Zhi Zhang, Lin Ling Zheng, Chun Mei Li, Jian Wang, Yuan Fang Li, Feng Liu, Na Li, Cheng Zhi Huang
The Golgi apparatus is an essential subcellular organelle. Targeting and monitoring the Golgi change at the single-cell level over a long time scale are critical but are challenges that have not yet been tackled. Inspired by the precise Golgi positioning ability of galactosyltransferase and protein kinase D, due to their cysteine residues, we developed a method for long-term Golgi imaging. Fluorescent molecules, carbon quantum dots (CQDs) and silica nanoparticles could target the Golgi when they are modified with l-cysteine...
October 1, 2017: Chemical Science
https://www.readbyqxmd.com/read/29146560/changes-in-the-degree-of-polymerization-of-wood-celluloses-during-dilute-acid-hydrolysis-and-tempo-mediated-oxidation-formation-mechanism-of-disordered-regions-along-each-cellulose-microfibril
#17
Ryunosuke Funahashi, Yuko Ono, Reina Tanaka, Morihiko Yokoi, Kunihiko Daido, Toru Inamochi, Tsuguyuki Saito, Yoshiki Horikawa, Akira Isogai
Most commercially available plant celluloses, such as kraft pulps and cotton celluloses, have so-called leveling-off degrees of polymerization (LODPs) when subjected to dilute acid hydrolysis. The formation of LODPs is hypothesized to be caused by disordered regions that are present periodically along each cellulose microfibril in plant celluloses. Here, we prepared never-dried wood cellulose, and wood celluloses at different drying stages, and subjected them to dilute acid hydrolysis. The viscosity average degrees of polymerization (DPv) of the wood celluloses decreased in DPv with increasing dilute acid-hydrolysis times...
November 13, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29146456/is-more-always-better-how-different-doses-of-exercise-after-incomplete-spinal-cord-injury-affects-the-membrane-properties-of-deep-dorsal-horn-interneurons
#18
M M Rank, M P Galea, R Callister, R J Callister
Interneurons in the deep dorsal horn (DDH) of the spinal cord process somatosensory input, and form an important link between upper and lower motoneurons to subsequently shape motor output. Exercise training after SCI is known to improve functional motor recovery, but little is known about the mechanisms within spinal cord neurons that underlie these improvements. Here we investigate how the properties of DDH interneurons are affected by spinal cord injury (SCI) alone, and SCI in combination with different 'doses' of treadmill exercise training (3, 6, and 9wks)...
November 13, 2017: Experimental Neurology
https://www.readbyqxmd.com/read/29146416/fulminant-adrenergic-myocarditis-complicated-by-pulmonary-edema-cardiogenic-shock-and-cardiac-arrest
#19
Pawel Rostoff, Bohdan Nessler, Patrycja Pikul, Karolina Golinska-Grzybala, Tomasz Miszalski-Jamka, Jadwiga Nessler
Adrenergic myocarditis is an uncommon presentation of pheochromocytoma and extremely rare cause of de novo acute heart failure (AHF). We present a case of a 31-year-old Caucasian woman with a history of hypertension and recurrent occipital headaches who was admitted to the emergency department due to severe de novo AHF presenting as pulmonary edema and cardiogenic shock. During the hospital admission the patient experienced asystolic cardiac arrest and was successfully resuscitated, intubated, and mechanically ventilated...
November 10, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29146186/human-soluble-thrombomodulin-induced-blockade-of-peripheral-hmgb1-dependent-allodynia-in-mice-requires-both-the-lectin-like-and-egf-like-domains
#20
Yusuke Hayashi, Ryuichi Tsujita, Maho Tsubota, Haruka Saeki, Fumiko Sekiguchi, Goichi Honda, Atsufumi Kawabata
Thrombomodulin (TM), an endothelial protein with anti-coagulant activity, is composed of 5 domains, D1-D5. Recombinant human soluble TM (TMα) consisting of D1-D3, which is generated in CHO cells, suppresses inflammatory and nociceptive signals by inactivating high mobility group box 1 (HMGB1), one of damage-associated molecular patterns. TMα sequesters HMGB1 with the lectin-like D1 and promotes its degradation by thrombin binding to the EGF-like D2. We prepared TM's D123, D1 and D2 by the protein expression system of yeast, and evaluated their effects on HMGB1 degradation in vitro and on the allodynia caused by HMGB1 in distinct redox forms in mice in vivo...
November 13, 2017: Biochemical and Biophysical Research Communications
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