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Isaac Assam Udo, Ifeanyi A Onwuezobe, Kingsley U Umeh
Purpose: The use of prosthetic biomaterials for reconstructing and reinforcing the posterior wall of the inguinal canal reduces the incidence of hernia recurrence. Cost, availability of mesh, and perhaps reluctance to adopt a new technique are factors which prevent widespread practice of hernioplasty in low-resource settings. Use of resterilized mesh significantly reduces the cost of hernioplasty and is safe. Patients and Methods: Sheets of 30 cm × 30 cm polypropylene mesh were cut into 16 cm × 8 cm to produce mesh strips which were repackaged into SELFSEAL® (Medical Action Industries Inc...
January 2018: Nigerian Journal of Surgery: Official Publication of the Nigerian Surgical Research Society
Qi Zhu, Caiyun Song, Xiaodong Li, Xudong Sun, Ji-Guang Li
Submicron sized, monodispersed spheres of Mn2+, Yb3+/Er3+ and Mn2+/Yb3+/Er3+ doped α-NaYF4 were easily autoclaved from mixed solutions of the component nitrates and ammonium fluoride (NH4F), in the presence of EDTA-2Na. Detailed characterizations of the resultant phosphors were obtained using XRD, Raman spectroscopy, FE-SEM, HR-TEM, STEM, PLE/PL spectroscopy, and fluorescence decay analysis. Finer structure and better crystal perfection was observed at a higher calcination temperature, and the spherical shape and excellent dispersion of the original particles was retained at temperatures up to 600 °C...
April 9, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
Sherin Jose Chockattu, B S Deepak, K Mallikarjun Goud
Context: One of the important goals of root canal therapy is disinfection aided by irrigation and intracanal medicaments. Commonly used nonsteroidal anti-inflammatory agents have shown anti-bacterial activity, thus, when used as intracanal medicaments, nonantibiotic agents have the potential to provide anti-inflammatory, local analgesic, and anti-bacterial activity. Aim: The aim of this study is to evaluate and compare the anti-bacterial efficiency of anti-inflammatory nonantibiotics ibuprofen and diclofenac, and routinely used intracanal dressing calcium hydroxide (Ca[OH]2 ), against Enterococcus faecalis , in an endodontic model...
January 2018: Journal of Conservative Dentistry: JCD
Sei Saitoh, Nobuhiko Ohno, Yurika Saitoh, Nobuo Terada, Satoshi Shimo, Kaoru Aida, Hideki Fujii, Tetsuro Kobayashi, Shinichi Ohno
Combined analysis of immunostaining for various biological molecules coupled with investigations of ultrastructural features of individual cells is a powerful approach for studies of cellular functions in normal and pathological conditions. However, weak antigenicity of tissues fixed by conventional methods poses a problem for immunoassays. This study introduces a method of correlative light and electron microscopy imaging of the same endocrine cells of compact and diffuse islets from human pancreatic tissue specimens...
February 27, 2018: Acta Histochemica et Cytochemica
Tao Li, Lei Chen, Jianbo Xiao, Fengping An, Cheng Wan, Hongbo Song
The in vitro prebiotic effects of resistant starch (RS), prepared by different treatments from purple yam, on Bifidobacterium adolescentis (bifidobacteria for short), were investigated. Tolerance tests indicated that bifidobacteria in PDS (prepared by debranching combined with autoclaving) and PDS.H (PDS further treated by double enzyme hydrolysis) media adapted better to simulated upper gastrointestinal conditions (at pH 1.5-3.0 and 0.3% and 1.0% bile acid) than those in GLU (glucose) and DAS (prepared by autoclaving) media...
April 5, 2018: Food & Function
Jicheng Chen, Yazhen Chen, Jingjing Tian, Huifang Ge, Xiaofeng Liang, Jianbo Xiao, Hetong Lin
A simple, accurate and specific high-performance liquid chromatography (HPLC) method has been developed and validated for simultaneous determination of sesamol, sesamin, asarinin and sesamolin in Monascus aged vinegar. The effects of acid hydrolysis and four heating treatments on the components content in Monascus aged vinegar were discussed. The results showed that the isomerisation of sesamin to asarinin, and decomposition of sesamolin to sesamol significantly increased, regardless of heating or acid hydrolysis...
August 1, 2018: Food Chemistry
Muhammad S Khan, Santosh K Misra, Ketan Dighe, Zhen Wang, Aaron S Schwartz-Duval, Dinabandhu Sar, Dipanjan Pan
Although significant technological advancements have been made in the development of analytical biosensor chips for detecting bacterial strains (E. coli, S. Mutans and B. Subtilis), critical requirements i.e. limit of detection (LOD), fast time of response, ultra-sensitivity with high reproducibility and good shelf-life with robust sensing capability have yet to be met within a single sensor chip. In order to achieve these criteria, we present an electrically-receptive thermally-responsive (ER-TR) sensor chip comprised of simple filter paper used as substrate coated with composite of poly(N-isopropylacrylamide) polymer (PNIPAm) - graphene nanoplatelet (GR) followed by evaporation of Au electrodes for capturing both Gram-positive (S...
March 23, 2018: Biosensors & Bioelectronics
Sami Rtimi, John Kiwi, Ayat Karimi, Rosendo Sanjinés
This study presents innovative Ti1- x Nbx N-Ag films obtained by a suitable combination of low-energy and high-energy sputtering leading to bacterial inactivation. The bacterial inactivation kinetics by the TiNbN layers was drastically enhanced by the addition of 6-7% Ag and proceeded to completion within 3 h after the film autoclaving. By X-ray photoelectron spectroscopy (XPS), the samples after autoclaving presented in their upper layers TiO2 , Nb2 O5 and Ag2 O with a surface composition of Ti0.81 Nb0.19 N0...
March 30, 2018: ACS Applied Materials & Interfaces
E Camposilvan, R Leone, L Gremillard, R Sorrentino, F Zarone, M Ferrari, J Chevalier
OBJECTIVES: The dental market moves towards high-translucency monolithic zirconia dental crowns, which are usually placed either with - or without - a thin glaze layer. The microstructural features and the mechanical performances of these materials are still controversial, as well as their susceptibility to aging. This paper aims at studying these aspects in the current generation of zirconia dental crowns showing different degrees of translucency. METHODS: Four different commercial zirconia materials were investigated, including one standard 'full-strength' 3Y-TZP and three grades with improved translucency...
March 26, 2018: Dental Materials: Official Publication of the Academy of Dental Materials
Kyungmo Kang, Yoonjee Chang, Jae Chun Choi, Se-Jong Park, Jaejoon Han
Safety concerns have emerged over the increased use of polypropylene (PP) in food-packaging markets. Some antioxidants in PP can migrate to foods and cause undesirable effects in humans. In this study, migration behaviors of butylated hydroxytoluene (BHT) and Irganox 1010 (I-1010) in PP sheets were determined according to the US FDA migration test conditions. In particular, we tested the effects of severe conditions of food processing and storage, such as autoclave heating (sterilization at about 121 °C), microwave radiation (700 W), and deep freezing (-30 °C) on migration of antioxidants...
March 25, 2018: Journal of Food Science
Chang Zeng, Mohamed M Meghil, Marcus Miller, Yaping Gou, Christopher W Cutler, Brian E Bergeron, Lina Niu, Jingzhi Ma, Franklin R Tay
OBJECTIVES: The effect of irrigation time on the antimicrobial efficacy of an apical negative pressure irrigation system was examined in vitro, followed by validation of the antimicrobial effect in vivo using the identified optimal irrigation time. METHODS: For the in vitro experiment, 44 extracted premolars were decoronated, instrumented, autoclaved and inoculated with Enterococcus faecalis (ATCC 29212) for 21 days. Four teeth were used as positive control, without irrigation...
March 20, 2018: Journal of Dentistry
(no author information available yet)
No abstract text is available yet for this article.
March 23, 2018: British Dental Journal
Anna Roszkowska, Marcos Tascon, Barbara Bojko, Krzysztof Goryński, Pedro Reck Dos Santos, Marcelo Cypel, Janusz Pawliszyn
The fast and sensitive determination of concentrations of anticancer drugs in specific organs can improve the efficacy of chemotherapy and minimize its adverse effects. In this paper, ex vivo solid-phase microextraction (SPME) coupled to LC-MS/MS as a method for rapidly quantitating doxorubicin (DOX) in lung tissue was optimized. Furthermore, the theoretical and practical challenges related to the real-time monitoring of DOX levels in the lung tissue of a living organism (in vivo SPME) are presented. In addition, several parameters for ex vivo/in vivo SPME studies, such as extraction efficiency of autoclaved fibers, intact/homogenized tissue differences, critical tissue amount, and the absence of an internal standard are thoroughly examined...
June 1, 2018: Talanta
Delphine Adam, Marta Maciejewska, Aymeric Naômé, Loïc Martinet, Wouter Coppieters, Latifa Karim, Denis Baurain, Sébastien Rigali
Cave moonmilk deposits host an abundant and diverse actinobacterial population that has a great potential for producing novel natural bioactive compounds. In our previous attempt to isolate culturable moonmilk-dwelling Actinobacteria, only Streptomyces species were recovered, whereas a metagenetic study of the same deposits revealed a complex actinobacterial community including 46 actinobacterial genera in addition to streptomycetes. In this work, we applied the rehydration-centrifugation method to lessen the occurrence of filamentous species and tested a series of strategies to achieve the isolation of hard-to-culture and rare Actinobacteria from the moonmilk deposits of the cave "Grotte des Collemboles"...
March 22, 2018: Antibiotics
J M M Adams, A L Winters, E M Hodgson, J A Gallagher
Background: Energy crops including Miscanthus provide a storable, portable energy source which can be used to complement a wide range of products and energy generation systems. Miscanthus is predominantly used in Europe as a combustion material for electricity generation but also has the potential for biochemical conversion due to its high yield and low-nutrient requirements. The ratio of holocellulose (hemicellulose and cellulose combined) to acid detergent lignin (H:L) within the senesced material has previously been shown to indicate the relative suitability of Miscanthus accessions for thermochemical conversion...
2018: Biotechnology for Biofuels
Bhaskar Mitra, Rene Lametsch, Tolga Akcan, Jorge Ruiz-Carrascal
The impact of thermal processing on meat proteins oxidation was investigated. Cooking treatments included 58 °C for either 72 min or 17 h (mimicking low temperature-long time sous vide cooking), 80, 98 and 160 °C for 72 min (mimicking common cooked meat products, stewing and roasting, respectively) and 118 °C for 8 min (autoclaving). Tryptophan degradation, fluorescent oxidation products, free thiol content and α-aminoadipic and γ-glutamic semialdehydes were tracked. For all of them, there was a consistent trend to increased levels of oxidative damage with higher cooking temperatures and longer cooking times, although the extent varied from one indicator to another...
March 10, 2018: Meat Science
Mohammad Hadi Aazami, Mohammad Hasan Fathi Nasri, Mohsen Mojtahedi, Shahla Roudbar Mohammadi
The aim of this study was to evaluate the ability of heat-killed baker's yeast (HKBY), the cell wall of baker's yeast (CWBY), and cell wall (1→3)-β-d-glucan of baker's yeast (BGBY) to bind aflatoxin B1 (AFB1 ) in phosphate-buffered saline (PBS) spiked with 0.5 μg/mL AFB1 . Baker's yeast ( Saccharomyces cerevisiae) was heat killed by autoclaving at 121°C for 10 min. The cell wall was physically extracted, and (1→3)-β-d-glucan was extracted by a modified method. The concentration of AFB1 was determined by high-performance liquid chromatography after exposure to binders for three contact times, 30 min, 5 h, and 24 h, at room temperature...
March 16, 2018: Journal of Food Protection
Anqi Dong, Yan Zhao, Xinqing Zhao, Qiyong Yu
Out-of-autoclave prepreg typically needs a long cure cycle to guarantee good properties as the result of low processing pressure applied. It is essential to reduce the manufacturing time, achieve real cost reduction, and take full advantage of out-of-autoclave process. The focus of this paper is to reduce the cure cycle time and production cost while maintaining high laminate quality. A rapidly cured out-of-autoclave resin and relative prepreg were independently developed. To determine a suitable rapid cure procedure for the developed prepreg, the effect of heating rate, initial cure temperature, dwelling time, and post-cure time on the final laminate quality were evaluated and the factors were then optimized...
March 13, 2018: Materials
Katarzyna Walczak, Heike Meißner, Ursula Range, Andreas Sakkas, Klaus Boening, Mieszko Wieckiewicz, Ioannis Konstantinidis
PURPOSE: The aging of zirconia ceramics (Y-TZP) is associated with tetragonal to monoclinic phase transformation. This change in microstructure may affect the optical properties of the ceramic. This study examines the effect of aging on the translucency of different zirconia materials. MATERIALS AND METHODS: 120 disc-shaped specimens were fabricated from four zirconia materials: Cercon ht white, BruxZir Solid Zirconia, Zenostar T0, Lava Plus (n = 30 per group). Accelerated aging was performed in a steam autoclave (134°C, 0...
March 11, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
Feng Cheng, Zheng Cui, Kwonit Mallick, Nagamany Nirmalakhandan, Catherine E Brewer
Hydrothermal liquefaction (HTL) of high-lipid microalgae Nannochloropsis salina (N. salina) and low-lipid microalgae Galdieria sulphuraria (G. sulphuraria) were run under subcritical conditions (310-350 °C and 10-17 MPa) in a 1.8 L batch autoclave system. HTL mass and energy balances for both species were compared under different operating conditions to predict the optimum reaction conditions for new algae strains based on their feedstock composition. Bio-crude oils and chars were characterized by bomb calorimetry, elemental analysis, inductively coupled plasma optical emission spectrometry (ICP-OES), and thermogravimetric analysis (TGA)...
February 24, 2018: Bioresource Technology
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