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https://www.readbyqxmd.com/read/28626247/time-resolved-saxs-studies-of-the-kinetics-of-thermally-triggered-release-of-encapsulated-silica-nanoparticles-from-block-copolymer-vesicles
#1
Charlotte J Mable, Matthew J Derry, Kate L Thompson, Lee A Fielding, Oleksandr O Mykhaylyk, Steven P Armes
Silica-loaded poly(glycerol monomethacrylate)-poly(2-hydroxypropyl methacrylate) diblock copolymer vesicles are prepared in the form of concentrated aqueous dispersions via polymerization-induced self-assembly (PISA). As the concentration of silica nanoparticles present during the PISA synthesis is increased up to 35% w/w, higher degrees of encapsulation of this component within the vesicles can be achieved. After centrifugal purification to remove excess non-encapsulated silica nanoparticles, SAXS, DCP, and TGA analysis indicates encapsulation of up to hundreds of silica nanoparticles per vesicle...
June 13, 2017: Macromolecules
https://www.readbyqxmd.com/read/28596917/assessment-of-vascular-change-using-swept-source-optical-coherence-tomography-angiography-a-new-theory-explains-central-visual-loss-in-behcet-s-disease
#2
Thanapong Somkijrungroj, Sritatath Vongkulsiri, Wijak Kongwattananon, Peranut Chotcomwongse, Sasivarin Luangpitakchumpol, Korrawan Jaisuekul
OBJECTIVE: To evaluate retinal vascular structural change in ocular Behcet's using optical coherence tomography angiography (OCTA) and fluorescein angiography (FA). METHODS: An analytic cross-sectional study of 37 eyes of 21 Behcet's uveitic patients was performed. Foveal retinal thickness (FRT), perifoveal hypoperfusion areas in superficial capillary plexus (SCP), and deep capillary plexus (DCP) were measured with swept-source optical coherence tomography and OCTA...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28593645/ultraviolet-a-photosensitivity-profile-of-dexchlorpheniramine-maleate-and-promethazine-based-creams-anti-inflammatory-antihistaminic-and-skin-barrier-protection-properties
#3
Gustavo Facchini, Samara Eberlin, Stefano Piatto Clerici, Ana Lucia Tabarini Alves Pinheiro, Adilson Costa
BACKGROUND: Unwanted side effects such as dryness, hypersensitivity, and cutaneous photosensitivity are challenge for adherence and therapeutical success for patients using treatments for inflammatory and allergic skin response. AIMS: In this study, we compared the effects of two dermatological formulations, which are used in inflammatory and/or allergic skin conditions: dexchlorpheniramine maleate (DCP; 10 mg/g) and promethazine (PTZ; 20 mg/g). METHODS: We evaluated both formulations for phototoxicity potential, skin irritation, anti-inflammatory and antihistaminic abilities, and skin barrier repair in vitro and ex vivo using the standard OECD test guideline n° 432, the ECVAM protocol n° 78, and cultured skin explants from a healthy patient...
June 7, 2017: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/28582765/new-applications-of-genetically-modified-pseudomonas-aeruginosa-for-toxicity-detection-in-water
#4
Dengbin Yu, Yang-Chun Yong, Changyu Liu, Youxing Fang, Lu Bai, Shaojun Dong
A novel mediator-free method based on genetically modified bacteria was developed for detecting water toxicity, where genetically modified Pseudomonas aeruginosa (GM P. aeruginosa) was selected as the biosensor strain and pyocyanin (PYO) produced by this strain was used as the indicator. The toxicity response of GM P. aeruginosa to 3, 5-dichlorophenol (3, 5-DCP) was measured electrochemically and spectroscopically, and the half maximal inhibitory concentration (IC50) of 3, 5-DCP was determined to be 15.1 mg/L...
May 29, 2017: Chemosphere
https://www.readbyqxmd.com/read/28582253/translating-comprehensive-conservative-care-for-chronic-knee-pain-into-a-digital-care-pathway-12-week-and-6-month-outcomes-for-the-hinge-health-program
#5
Peter Smittenaar, Jennifer C Erhart-Hledik, Rose Kinsella, Simon Hunter, Gabriel Mecklenburg, Daniel Perez
BACKGROUND: Chronic knee pain (CKP) affects a large number of adults, many of whom do not receive best-practice care and are at high risk for unnecessary surgery. OBJECTIVE: The aim of this study was to investigate the effect of the Hinge Health 12-week digital care program (DCP) for CKP on knee pain and function, with secondary outcomes of surgery interest and satisfaction, at 12 weeks and 6 months after starting the program. METHODS: Individuals with CKP were recruited onto the 12-week program, comprising sensor-guided physical exercises, weekly education, activity tracking, and psychosocial support such as personal coaching and cognitive behavioral therapy (CBT)...
April 5, 2017: JMIR Rehabil Assist Technol
https://www.readbyqxmd.com/read/28574924/optical-coherence-tomography-angiography-in-retinal-vein-occlusion-correlations-between-macular-vascular-density-visual-acuity-and-peripheral-nonperfusion-area-on-fluorescein-angiography
#6
Daniel Seknazi, Florence Coscas, Alexandre Sellam, Fabien Rouimi, Gabriel Coscas, Eric H Souied, Agnès Glacet-Bernard
PURPOSE: To study correlations in patients with retinal vein occlusion between the automatically quantified macular vascular densities in the superficial and deep capillary plexus (DCP) obtained using optical coherence tomography angiography (OCTA) and the data from conventional examination, particularly visual acuity and peripheral retinal nonperfusion assessed using fluorescein angiography (FA). METHODS: Retrospective, observational study of patients with retinal vein occlusion who underwent a comprehensive ophthalmic examination including FA and OCTA using the AngioVue OCTA system version 2015...
May 31, 2017: Retina
https://www.readbyqxmd.com/read/28571245/rituximab-a-magic-bullet-for-pemphigus
#7
V Anandan, W Afthab Jameela, R Sowmiya, M Mani Surya Kumar, P Lavanya
INTRODUCTION: Pemphigus, an autoimmune disease, was fatal before the era of corticosteroids. With the advent of steroids, mortality decreased but morbidity was present due to the side effects of high dose steroids. Newer drugs targeted at the molecular level are said to have fewer side effects and improved effectiveness. AIM: The aim of our study was to assess the effectiveness of one such drug, Rituximab, a biological, in treating pemphigus vulgaris and to identify common adverse events...
April 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28561879/des-gamma-carboxy-prothrombin-in-hepatocellular-cancer-patients-waiting-for-liver-transplant-a-systematic-review-and-meta-analysis
#8
Quirino Lai, Samuele Iesari, Giovanni Battista Levi Sandri, Jan Lerut
BACKGROUND: The use of des-gamma-carboxy prothrombin (DCP) as a predictor of the risk of recurrence of hepatocellular cancer (HCC) after liver transplant (LT) has recently gained interest, especially in view of the recent extension of the eligibility criteria of these patients for LT. The aim of the present study is to look into this important matter based on a systematic review and meta-analysis. METHODS: A systematic literature review about the role of DCP in the specific setting of LT for HCC has been conducted...
May 26, 2017: International Journal of Biological Markers
https://www.readbyqxmd.com/read/28555163/spontaneous-production-of-glutathione-conjugated-forms-of-1-2-dichloropropane-comparative-study-on-metabolic-activation-processes-of-dihaloalkanes-associated-with-occupational-cholangiocarcinoma
#9
Yu Toyoda, Tappei Takada, Hiroshi Suzuki
Recently, epidemiological studies revealed a positive relationship between an outbreak of occupational cholangiocarcinoma and exposure to organic solvents containing 1,2-dichloropropane (1,2-DCP). In 1,2-DCP-administered animal models, we previously found biliary excretion of potentially oncogenic metabolites consisting of glutathione- (GSH-) conjugated forms of 1,2-DCP (GS-DCPs); however, the GS-DCP production pathway remains unknown. To enhance the understanding of 1,2-DCP-related risks to human health, we examined the reactivity of GSH with 1,2-DCP in vitro and compared it to that with dichloromethane (DCM), the other putative substance responsible for occupational cholangiocarcinoma...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28552111/combination-of-serum-tumor-markers-dickkopf-1-dcp-and-afp-for-the-diagnosis-of-primary-hepatocellular-carcinoma
#10
Qi-Fan Qin, Jie Weng, Gan-Xin Xu, Chun-Ming Chen, Chang-Ku Jia
OBJECTIVE: To evaluate the detection accuracy of the biomarkers dickkopf-1, DCP and AFP as a serum biomarker panel by comparing the sensitivity of the panel with those of the individual biomarkers. METHODS: The study was composed of three groups, one with HCC patients, one with non-HCC liver diseases and one with healthy controls. Serum AFP was measured using a chemiluminescence assay and serum dickkopf-1 and DCP were measured with ELISA. The sensitivity and specificity of the biomarkers were analyzed as single parameters and as a serum panel...
April 2017: Asian Pacific Journal of Tropical Medicine
https://www.readbyqxmd.com/read/28541678/identification-of-active-hydrogen-species-on-palladium-nanoparticles-for-an-enhanced-electrocatalytic-hydrodechlorination-of-2-4-dichlorophenol-in-water
#11
Guangming Jiang, Mengna Lan, Zhiyong Zhang, Xiaoshu Lv, Zimo Lou, Xinhua Xu, Fan Dong, Sen Zhang
Clarifying hydrogen evolution and identifying the active hydrogen species are crucial to the understanding of electrocatalytic hydrodechlorination (EHDC) mechanism. Here, monodisperse palladium nanoparticles (Pd NPs) are used as a model catalyst to demonstrate the potential-dependent evolutions of three hydrogen species, including adsorbed atomic hydrogen (H*ads), absorbed atomic hydrogen (H*abs) and molecular hydrogen (H2) on Pd NPs, and then their effect on EHDC of 2,4-dichlorophenol (2,4-DCP). Our results show that H*ads, H*abs and H2 all emerge at -0...
May 25, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28538221/retinal-microvasculature-in-nonproliferative-diabetic-retinopathy-automated-quantitative-optical-coherence-tomography-angiography-assessment
#12
Marco Lupidi, Gabriel Coscas, Florence Coscas, Tito Fiore, Elisa Spaccini, Daniela Fruttini, Carlo Cagini
PURPOSE: To perform a qualitative and quantitative assessment of the foveal microvasculature in eyes with diabetic maculopathy using optical coherence tomography angiography (OCT-A). METHODS: Retrospective case series of 48 eyes with diabetic maculopathy and 47 healthy eyes evaluated by Spectralis OCT-A. Perifoveal arcade disruptions, linear vascular dilations, microaneurysms, intraretinal microvascular abnormalities and flow-void areas were qualitatively analyzed on OCT angiograms both for the superficial (SCP) and deep (DCP) capillary plexuses...
May 25, 2017: Ophthalmic Research
https://www.readbyqxmd.com/read/28527381/enantioselectivity-of-haloalkane-dehalogenase-linb-on-the-degradation-of-1-2-dichloropropane-a-qm-mm-study
#13
Xiaowen Tang, Ruiming Zhang, Yanwei Li, Qingzhu Zhang, Wenxing Wang
The hydrolysis dechlorination mechanism of a chiral organochlorinepollutant, 1,2-dichloropropane (DCP), catalyzed by haloalkane dehalogenase LinB has been investigated by using a combined quantum mechanics/molecular mechanics method. LinB was confirmed to be enantioselective towards the catabolism of the racemic mixture. Based on the SN2 nucleophilic substitution mechanism, the dechlorination process was identified as the rate-determining step in LinB-catalyzed degradation of 1,2-dichloropropane, the Boltzmann-weighted average potential barrier of which is 18...
May 12, 2017: Bioorganic Chemistry
https://www.readbyqxmd.com/read/28522828/efficient-wideband-numerical-simulations-for-nanostructures-employing-a-drude-critical-points-dcp-dispersive-model
#14
Qiang Ren, Jogender Nagar, Lei Kang, Yusheng Bian, Ping Werner, Douglas H Werner
A highly efficient numerical approach for simulating the wideband optical response of nano-architectures comprised of Drude-Critical Points (DCP) media (e.g., gold and silver) is proposed and validated through comparing with commercial computational software. The kernel of this algorithm is the subdomain level discontinuous Galerkin time domain (DGTD) method, which can be viewed as a hybrid of the spectral-element time-domain method (SETD) and the finite-element time-domain (FETD) method. An hp-refinement technique is applied to decrease the Degrees-of-Freedom (DoFs) and computational requirements...
May 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28521016/influence-of-gsh-s-transferase-on-the-mutagenicity-induced-by-dichloromethane-and-1-2-dichloropropane
#15
Nozomi Akiba, Kazuhiro Shiizaki, Yoshitaka Matsushima, Osamu Endo, Kazuho Inaba, Yukari Totsuka
It has been suggested that dichloromethane (DCM) and 1,2-dichloropropane (DCP) are responsible for occupational cholangiocarcinoma. Dihaloalkanes are metabolically activated by GSH S-transferase theta1 (GSTT1) to yield products such as episulfonium ions. However, whether the GSTT1-mediated step of these dihaloalkanes is related to occupational cholangiocarcinoma is not known. In the present study, we investigated the influence of GSTT1 activation on the mutagenicity of DCM and 1,2-DCP using GSTT1-expressing Salmonella typhimurium TA100 (TA100-GST)...
May 17, 2017: Mutagenesis
https://www.readbyqxmd.com/read/28515937/dicyano-and-tetracyanopentacene-foundation-of-an-intriguing-new-class-of-easy-to-synthesize-organic-semiconductors
#16
Florian Glöcklhofer, Andreas Petritz, Esther Karner, Michael J Bojdys, Barbara Stadlober, Johannes Fröhlich, Miriam M Unterlass
Cyanated pentacenes are very promising candidate materials for ambipolar and n-type transistors. However, only a few examples have been obtained to date - all requiring lengthy, multi-step processes. Herein, we present the first preparation of 5,7,12,14-tetracyanopentacene (TCP) and a facile, scaled-up preparation of 6,13-dicyanopentacene (DCP). Both compounds are prepared by a one-pot synthesis using cheap quinones as starting materials. Detailed crystallographic investigations evince that the bulk assemblies of both cyanated pentacenes are dominated by non-covalent interactions, resulting in a dense, stable, face-to-face packing and in an intriguing packing motif for TCP...
March 14, 2017: Journal of Materials Chemistry. C, Materials for Optical and Electronic Devices
https://www.readbyqxmd.com/read/28501447/comparison-of-quantitative-measurement-of-foveal-avascular-zone-and-macular-vessel-density-in-eyes-of-children-with-amblyopia-and-healthy-controls-an-optical-coherence-tomography-angiography-study
#17
Ihsan Yilmaz, Osman Bulut Ocak, Basak Saracoglu Yilmaz, Aslı Inal, Birsen Gokyigit, Muhittin Taskapili
PURPOSE: To quantify vessel density of superficial capillary plexus (SCP), deep capillary plexus (DCP), and the foveal avascular zone (FAZ) of children's amblyopic eyes and to compare the measurements with those of companion eyes and age-matched controls. METHODS: Fifteen patients with strabismic amblyopia, and 15 age-matched controls were included in this cross-sectional study. SCP, DCP, and FAZ were measured via optical coherence tomographic angiography (OCTA)...
May 10, 2017: Journal of AAPOS: the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/28489918/oct-angiography-a-qualitative-and-quantitative-comparison-of-4-oct-a-devices
#18
Marion R Munk, Helena Giannakaki-Zimmermann, Lieselotte Berger, Wolfgang Huf, Andreas Ebneter, Sebastian Wolf, Martin S Zinkernagel
PURPOSE: To compare the quality of four OCT-angiography(OCT-A) modules. METHOD: The retina of nineteen healthy volunteers were scanned with four OCT-devices (Topcon DRI-OCT Triton Swept-source OCT, Optovue RTVue-XR, a prototype Spectralis OCT2, Heidelberg-Engineering and Zeiss Cirrus 5000-HD-OCT). The device-software generated en-face OCT-A images of the superficial (SCP) and deep capillary plexuses (DCP) were evaluated and scored by 3 independent retinal imaging experts...
2017: PloS One
https://www.readbyqxmd.com/read/28484419/altered-functional-connectivity-of-striatal-subregions-in-patients-with-multiple-sclerosis
#19
Fangyuan Cui, Li Zhou, Zengjian Wang, Courtney Lang, Joel Park, Zhongjian Tan, Yao Yu, Chunyan Sun, Ying Gao, Jian Kong
Abnormal corticostriatal resting-state functional connectivity (rsFC) has been implicated in the neuropathology of multiple sclerosis. The striatum, a component of the basal ganglia, is involved in diverse functions including movement, cognition, emotion, and limbic information processing. However, the brain circuits of the striatal subregions contributing to the changes in rsFC in relapsing-remitting multiple sclerosis (RRMS) patients remain unknown. We used six subdivisions of the striatum in each hemisphere as seeds to investigate the rsFC of striatal subregions between RRMS patients and matched healthy controls (HCs)...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28483496/relationship-between-internal-reflectivity-of-diabetic-microaneurysms-on-sd-oct-and-detection-on-oct-angiography
#20
Mariacristina Parravano, Daniele De Geronimo, Fabio Scarinci, Lea Querques, Gianni Virgili, Joseph Michael Simonett, Monica Varano, Francesco Bandello, Giuseppe Querques
PURPOSE: To correlate the appearance of Microaneurysms (MAs) on structural spectral-domain optical coherence tomography (SD-OCT) with their detection on OCT angiography (OCTA) in patients with non-proliferative diabetic retinopathy (NPDR). DESIGN: Inter-instrument reliability study. METHODS: Sixteen patients with NPDR without macular edema underwent SD-OCT and OCTA. To compare MAs seen on OCTA to those on SD-OCT, we superimposed the OCTA superficial capillary plexus (SCP) vascular landmarks onto those of the near infrared...
May 5, 2017: American Journal of Ophthalmology
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