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https://www.readbyqxmd.com/read/29333949/the-reading-man-flap-for-reconstruction-of-large-periorbital-defects
#1
Elizabeth A Insull, Varajini Joganathan, Jonathan H Norris
PURPOSE: The "reading man" flap (RMF), a double advancement transposition cutaneous flap named for its appearance, has been described in the reconstruction of various circular skin defects, particularly in the malar region. We describe two cases where this flap was used to reconstruct the lower eyelid/periorbital region. METHODS: Two oculoplastic patients with lower eyelid basal cell carcinomas underwent Mohs micrographic excision resulting in a large skin defects...
January 15, 2018: Orbit
https://www.readbyqxmd.com/read/29330276/cutaneous-mycobacterium-massiliense-infection-from-tattooing-a-common-yet-under-reported-and-persistent-epidemic-hazard-for-dermatologists
#2
Lymaries Velez, Jennifer Harb, Stephanie Anuszewski, Stanton Wesson
Tattoo popularity continues to rise, with 3 in 10 Americans bearing at least one. Among tattoo complications, non-tuberculous mycobacteria (NTM) has emerged as a global public health concern. NTM infections associated with tattooing of immunocompetent individuals have occurred as sporadic cases and community outbreaks. Water sources are considered the major pathogenic reservoirs. Tattoo-related inoculation has been linked to contamination of ink, either during the manufacturing process or during dilution of black ink using non-sterile water...
January 12, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29329503/chemical-imaging-of-aggressive-basal-cell-carcinoma-using-time-of-flight-secondary-ion-mass-spectrometry
#3
Marwa Munem, Oscar Zaar, Kelly Dimovska Nilsson, Noora Neittaanmäki, John Paoli, John S Fletcher
A set of basal cell carcinoma samples, removed by Mohs micrographic surgery and pathologically identified as having an aggressive subtype, have been analyzed using time-of-flight secondary ion mass spectrometry (SIMS). The SIMS analysis employed a gas cluster ion beam (GCIB) to increase the sensitivity of the technique for the detection of intact lipid species. The GCIB also allowed these intact molecular signals to be maintained while surface contamination and delocalized chemicals were removed from the upper tissue surface...
January 12, 2018: Biointerphases
https://www.readbyqxmd.com/read/29317687/the-synergistic-bactericidal-effect-of-vancomycin-on-utmd-treated-biofilm-involves-damage-to-bacterial-cells-and-enhancement-of-metabolic-activities
#4
Jian Hu, Ning Zhang, Lifang Li, Ning Zhang, Yanfen Ma, Chedong Zhao, Qian Wu, Ying Li, Nianan He, Xiaoqin Wang
In this study, the synergistic effect of vancomycin, a cell wall synthesis inhibitor, and ultrasound-targeted microbubble destruction (UTMD), on cell viability of Staphylococcus epidermidis, embedded in biofilm, was investigated. Biofilms are the leading causes of antibiotic-resistant bacterial infections of medical implants and prosthetics worldwide. The antibiotic-resistant nature of biofilm-embedded pathogens poses a critical challenge to the medical community. Previously, studies have demonstrated the efficacy of using ultrasound waves and UTMD in circumventing this problem...
January 9, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29315146/conjunctival-concretions-found-in-mohs-micrographic-surgery
#5
Michael J Davis, Lauren P Rimoin, Travis W Blalock
No abstract text is available yet for this article.
January 8, 2018: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/29315027/surface-attachment-of-natural-antimicrobial-coatings-onto-conventional-polypropylene-nonwoven-fabric-and-its-antimicrobial-performance-assessment
#6
Lijun Ding, Hao Wang, Dan Liu, Zhengnan Zheng
The growing number of microbial cross-contamination events necessitates the development of novel antimicrobial strategies in the food industry. In this study, a polypropylene nonwoven fabric (PPNWF) was grafted with a natural antimicrobial component, aloe emodin (AE), and its antimicrobial performance was evaluated. The grafted samples (PPNWF-g-AE) were examined using Fourier transform infrared spectroscopy and scanning electron microscopy. AE was effectively grafted onto the surface of the PPNWF through the adsorption covalent effect...
February 2018: Journal of Food Protection
https://www.readbyqxmd.com/read/29313595/the-byssus-threads-of-pinna-nobilis-a-histochemical-and-ultrastructural-study
#7
Andrea Diana, Marcella Reguzzoni, Terenzio Congiu, Antonio Rescigno, Federica Sollai, Mario Raspanti
The byssus of Pinna nobilis, the largest bivalve mollusc in the Mediterranean Sea, was investigated by histochemistry, immunohistochemistry, Transmission Electron Microscopy (TEM), Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM). At low magnification, the byssus threads appeared distinctively elliptical in cross-section, with a typical size approaching 50 x 25 micron and a featureless glassy appearance. Histochemical and immunohistochemical techniques confirmed the presence of elastic domains but the absence of collagen, which is known to be the main component in other molluscs...
November 13, 2017: European Journal of Histochemistry: EJH
https://www.readbyqxmd.com/read/29313392/improved-intestinal-absorption-of-paclitaxel-by-mixed-micelles-self-assembled-from-vitamin-e-succinate-based-amphiphilic-polymers-and-their-transcellular-transport-mechanism-and-intracellular-trafficking-routes
#8
Xiaoyou Qu, Yang Zou, Chuyu He, Yuanhang Zhou, Yao Jin, Yunqiang Deng, Ziqi Wang, Xinru Li, Yanxia Zhou, Yan Liu
To ensure that antitumor drugs can be effectively transported across intestinal barrier and then quickly released in tumor cells, mixed polymeric micelles (Mix-PMs) were designed and fabricated by combining poly(2-ethyl-2-oxazoline)-vitamin E succinate (PEOz-VES) with TPGS1000 for enhancing intestinal absorption of paclitaxel. PEOz-VES exhibited an extremely low critical micelle concentration and negligible cytotoxicity. The Mix-PMs were characterized to have about 20 nm in diameter, uniform spherical morphology, high drug-loading content and sustained drug release profile with a retained pH-sensitivity...
November 2018: Drug Delivery
https://www.readbyqxmd.com/read/29312537/lipopolysaccharide-induces-acute-bursal-atrophy-in-broiler-chicks-by-activating-tlr4-mapk-nf-%C3%AE%C2%BAb-ap-1-signaling
#9
Abdur Rahman Ansari, Ning-Ya Li, Zhi-Jian Sun, Hai-Bo Huang, Xing Zhao, Lei Cui, Ya-Fang Hu, Ju-Ming Zhong, Niel A Karrow, Hua-Zhen Liu
We investigated the mechanisms that induce atrophy of the chicken bursa of Fabricius (BF) upon lipopolysaccharide (LPS) treatment in young chicks. LPS treatment resulted in ∼36% decrease in bursal weight within 36 h (P < 0.01). Histological analysis showed infiltration of eosinophilic heterophils and nucleated oval shaped RBCs in or near blood vessels of the BF from LPS-treated chicks. Scanning electron micrographs showed severe erosion and breaks in the mucosal membrane at 12 h and complete exuviation of bursal mucosal epithelial cells at 36 h...
December 12, 2017: Oncotarget
https://www.readbyqxmd.com/read/29311594/cryo-em-structure-of-intact-rotary-h-atpase-synthase-from-thermus-thermophilus
#10
Atsuko Nakanishi, Jun-Ichi Kishikawa, Masatada Tamakoshi, Kaoru Mitsuoka, Ken Yokoyama
Proton translocating rotary ATPases couple ATP hydrolysis/synthesis, which occurs in the soluble domain, with proton flow through the membrane domain via a rotation of the common central rotor complex against the surrounding peripheral stator apparatus. Here, we present a large data set of single particle cryo-electron micrograph images of the V/A type H+-rotary ATPase from the bacterium Thermus thermophilus, enabling the identification of three rotational states based on the orientation of the rotor subunit...
January 8, 2018: Nature Communications
https://www.readbyqxmd.com/read/29306082/effect-of-freezing-conditions-on-%C3%AE-tricalcium-phosphate-camphene-scaffold-with-micro-sized-particles-fabricated-by-freeze-casting
#11
Gurdev Singh, S Soundarapandian
The long standing need of the implant manufacturing industries is to fabricate multi-matrix, customized porous scaffold as cost-effectively. In recent years, freeze casting has shown greater opportunity in the fabrication of porous scaffolds (tricalcium phosphate, hydroxyapatite, bioglass, alumina, etc.) such as at ease and good control over pore size, porosity, a range of materials and economic feasibility. In particular, tricalcium phosphate (TCP) has proved as it possesses good biocompatible (osteoinduction, osteoconduction, etc...
December 30, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29298552/e-beam-sterilizable-thermoplastics-elastomers-for-healthcare-devices-mechanical-morphology-and-in-vivo-studies
#12
Ananad Bellam Balaji, Chantara Thevy Ratnam, Mohammad Khalid, Rashmi Walvekar
The effect of electron beam radiation on ethylene-propylene diene terpolymer/polypropylene blends is studied as an attempt to develop radiation sterilizable polypropylene/ethylene-propylene diene terpolymer blends suitable for medical devices. The polypropylene/ethylene-propylene diene terpolymer blends with mixing ratios of 80/20, 50/50, 20/80 were prepared in an internal mixer at 165°C and a rotor speed of 50 rpm/min followed by compression molding. The blends and the individual components were radiated using 3...
January 1, 2018: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/29298405/ultrastructural-features-of-alkhumra-hemorrhagic-fever-virus-infection-of-cells-under-in-vivo-and-in-vitro-conditions
#13
Tariq A Madani, El-Tayb M E Abuelzein, Huda Abu-Araki, Soad S Ali, Sawsan M Jalalah, Ahmed M Hassan, Hussein M S Al-Bar, Esam I Azhar
Alkhumra hemorrhagic fever virus (AHFV) is an emerging novel flavivirus that was discovered in Saudi Arabia in 1995. The virus has since caused several outbreaks in the country that resulted in case fatality rates ranging from 1% to 25%. Meager information has been published on the ultrastructural features of the virus on cells under in vitro or in vivo conditions. The present electron microscopic study examined and compared the intracellular growth of the AHFV on the LLC-MK2 cells and brain cells of new born Wistar rats, inoculated intracerebrally...
January 3, 2018: Vector Borne and Zoonotic Diseases
https://www.readbyqxmd.com/read/29297555/the-in-situ-effect-of-titanium-tetrafluoride-gel-on-erosion-abrasion-progression-in-human-dentin
#14
Taís Fonseca Mantilla, Cecilia Pedroso Turssi, Thayanne Monteiro Ramos-Oliveira, Camila Vieira da Silva, Luis Cláudio Suzuki, Patricia Moreira de Freitas
Erosion incidence is increasing and its control is still a challenge in clinical practice. This study evaluated 4% TiF4-gel effects on eroded human dentin subjected to in situ erosive/abrasive episodes. Seventy-two previously eroded dentin slabs (0.05 M citric acid, pH 2.3, 20 min) were allocated to 6 groups (n=12) according to the treatment to be performed during the in situ phase and number of erosive/abrasive cycles, as follows: 4% TiF4-gel applied once (TiF41), twice (TiF42) or three times (TiF43) followed by 1, 2 and 3 erosive/abrasive cycles, respectively...
May 2017: Brazilian Dental Journal
https://www.readbyqxmd.com/read/29296502/automated-multimodal-spectral-histopathology-for-quantitative-diagnosis-of-residual-tumour-during-basal-cell-carcinoma-surgery
#15
Radu Boitor, Kenny Kong, Dustin Shipp, Sandeep Varma, Alexey Koloydenko, Kusum Kulkarni, Somaia Elsheikh, Tom Bakker Schut, Peter Caspers, Gerwin Puppels, Martin van der Wolf, Elena Sokolova, T E C Nijsten, Brogan Salence, Hywel Williams, Ioan Notingher
Multimodal spectral histopathology (MSH), an optical technique combining tissue auto-fluorescence (AF) imaging and Raman micro-spectroscopy (RMS), was previously proposed for detection of residual basal cell carcinoma (BCC) at the surface of surgically-resected skin tissue. Here we report the development of a fully-automated prototype instrument based on MSH designed to be used in the clinic and operated by a non-specialist spectroscopy user. The algorithms for the AF image processing and Raman spectroscopy classification had been first optimised on a manually-operated laboratory instrument and then validated on the automated prototype using skin samples from independent patients...
December 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/29289823/toltrazuril-mixed-nanomicelle-delivery-system-based-on-sodium-deoxycholate-brij-c20-polyethylene-ether-triton-x100-characterization-solubility-and-bioavailability-study
#16
Li Zhang, Dandan Ren, Jianyu Zhou, Guangneng Peng, Gang Shu, Zhixiang Yuan, Fei Shi, Ling Zhao, Lizi Yin, Guoqing Fan, Chang Liu, Hualin Fu
Toltrazuril (Tol) is a broad-spectrum anticoccidiosis drug that is widely used in the prevention and treatment of coccidiosis infection in poultry and mammals. However, the drug has poor aqueous solubility (25 °C, 0.41 μg/mL), and its dose escalation for systemic administration remains challenging. We engineered a Tol mixed nanomicelle (TMNM) delivery system based on sodium deoxycholate-Brij C20 polyethylene ether-triton x100 (NaDC-Brij58-Tx100) as surfactants by film hydration method. The physical properties of TMNM were characterized, and the pharmacokinetic parameters of Tol and TMNM were compared...
December 16, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29285162/enhancing-effects-of-basic-fibroblast-growth-factor-and-fibronectin-on-osteoblast-adhesion-to-bone-scaffolds-for-bone-tissue-engineering-through-extracellular-matrix-integrin-pathway
#17
Li Feng, Yehong Li, Wenchao Zeng, Bo Xia, Dongsheng Zhou, Jing Zhou
The present study aimed to investigate the effects of basic fibroblast growth factor (bFGF) and fibronectin (FN) on adhesion of osteoblasts seeded into bio-derived bone scaffolds. Rat calvarial osteoblasts were separated and their osteogenic phenotypes were determined by staining for alkaline phosphatase as well as alizarin red staining. The bio-derived bone scaffolds were prepared from the metaphysis of porcine femur and their physicochemical properties were assessed by scanning electron microscopy (SEM) and X-ray diffraction analysis...
December 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29284662/junctional-trafficking-and-restoration-of-retrograde-signaling-by-the-cytoplasmic-ryr1-domain
#18
Alexander Polster, Stefano Perni, Dilyana Filipova, Ong Moua, Joshua D Ohrtman, Hicham Bichraoui, Kurt G Beam, Symeon Papadopoulos
The type 1 ryanodine receptor (RyR1) in skeletal muscle is a homotetrameric protein that releases Ca2+ from the sarcoplasmic reticulum (SR) in response to an "orthograde" signal from the dihydropyridine receptor (DHPR) in the plasma membrane (PM). Additionally, a "retrograde" signal from RyR1 increases the amplitude of the Ca2+ current produced by CaV1.1, the principle subunit of the DHPR. This bidirectional signaling is thought to depend on physical links, of unknown identity, between the DHPR and RyR1. Here, we investigate whether the isolated cytoplasmic domain of RyR1 can interact structurally or functionally with CaV1...
December 28, 2017: Journal of General Physiology
https://www.readbyqxmd.com/read/29283675/depth-dependent-out-of-plane-young-s-modulus-of-the-human-cornea
#19
Manuel A Ramirez-Garcia, Stephen R Sloan, Bennett Nidenberg, Yousuf M Khalifa, Mark R Buckley
Purpose/Aim: Despite their importance in accurate mechanical modeling of the cornea, the depth-dependent material properties of the cornea have only been partially elucidated. In this work, we characterized the depth-dependent out-of-plane Young's modulus of the central and peripheral human cornea with high spatial resolution. MATERIALS AND METHODS: Central and peripheral corneal buttons from human donors were subjected to unconfined axial compression followed by stress relaxation for 30 min...
December 28, 2017: Current Eye Research
https://www.readbyqxmd.com/read/29277640/using-image-attributes-to-assure-accurate-particle-size-and-count-using-nanoparticle-tracking-analysis
#20
Adrian P Defante, Wyatt N Vreeland, Kurt D Benkstein, Dean C Ripple
Nanoparticle tracking analysis (NTA) obtains particle size by analysis of particle diffusion through a time series of micrographs and particle count by a count of imaged particles. The number of observed particles imaged is controlled by the scattering cross-section of the particles and by camera settings such as sensitivity and shutter speed. Appropriate camera settings are defined as those that image, track, and analyze a sufficient number of particles for statistical repeatability. Here, we test if image attributes, features captured within the image itself, can provide measurable guidelines to assess the accuracy for particle size and count measurements using NTA...
December 22, 2017: Journal of Pharmaceutical Sciences
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