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https://www.readbyqxmd.com/read/28419504/sensory-and-rheological-characteristics-of-thickened-liquids-differing-concentrations-of-a-xanthan-gum-based-thickener
#1
Hyeri Kim, Han-Im Hwang, Ki-Won Song, Jeehyun Lee
The objectives of this study were to develop and compare sensory characteristics of beverages and soups thickened with different concentrations of a xanthan gum-based thickener, and to examine, using rheological measurement, whether the viscosity of the thickened liquids conformed to the recommendations of the National Dysphagia Diet Task Force. Beverages tested included water, plum juice, apple juice, orange juice, milk, soymilk, and Yakult. The thickening agent was added to samples at concentrations of 1%, 2%, or 3%...
April 17, 2017: Journal of Texture Studies
https://www.readbyqxmd.com/read/28419130/virus-induced-down-regulation-of-gmera1a-and-gmera1b-genes-enhances-the-stomatal-response-to-abscisic-acid-and-drought-resistance-in-soybean
#2
Takuya Ogata, Yukari Nagatoshi, Noriko Yamagishi, Nobuyuki Yoshikawa, Yasunari Fujita
Drought is a major threat to global soybean production. The limited transformation potential and polyploid nature of soybean have hindered functional analysis of soybean genes. Previous research has implicated farnesylation in the plant's response to abscisic acid (ABA) and drought tolerance. We therefore used virus-induced gene silencing (VIGS) to evaluate farnesyltransferase genes, GmERA1A and GmERA1B (Glycine max Enhanced Response to ABA1-A and -B), as potential targets for increasing drought resistance in soybean...
2017: PloS One
https://www.readbyqxmd.com/read/28407434/spatiotemporal-characterization-of-hydration-process-of-asymmetric-polymeric-wound-dressings-for-decubitus-ulcers
#3
Anna Górska, Przemyslaw Dorożyński, Władysław P Węglarz, Krzysztof Jasiński, Mateusz Kurek, Renata Jachowicz, Jolanta Klaja, Piotr Kulinowski
Pressure ulcers belong to the most chalenging clinical problems. As hydration level of such wounds is important for optimal healing, preparation of new wound dressing (WD) materials for pressure ulcers requires thorough in vitro evaluation as prerequisite to final in vivo testing. The aims of the study were to: (a) develop a simple method of preparation of asymmetric polymeric membrane, (b) to propose a set of in vitro methods for membrane characterization during hydration. A polyvinyl alcohol asymmetric membrane with homogeneous skin layer and porous spongy layer was developed with nonadhesive properties and ability to absorb and retain the water...
April 13, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28394535/-metaphylaxis-of-urolithiasis-new-look-modern-approach-implementation-in-a-mobile-application
#4
N K Gadzhiev, S S Brovkin, V E Grigorev, V V Dmitriev, V A Malkhasyan, D D Shkarupa, A V Pisarev, D V Mazurenko, V M Obidnyak, I N Orlov, S V Popov, N S Tagirov, S V Petrov
AIM: To analyze the sub-segment of mHealth devoted to assessing of the risk of recurrent stone formation and metaphylaxis of stone formation. To design a smartphone application (app.) in Russian language for urolithiasis patients. MATERIALS AND METHODS: Three working groups of urologists from three St. Petersburg clinics searched for downloadable medical applications relevant to the above requirements. After searching and analyzing existing medical applications, the most acceptable design and structure of our own application were identified...
April 2017: Urologii︠a︡
https://www.readbyqxmd.com/read/28383892/enantioseparation-of-imazalil-and-monitoring-of-its-enantioselective-degradation-in-apples-and-soils-using-ultrahigh-performance-liquid-chromatography-tandem-mass-spectrometry
#5
Runan Li, Fengshou Dong, Jun Xu, Xingang Liu, Xiaohu Wu, Xinglu Pan, Yan Tao, Zenglong Chen, Yongquan Zheng
Imazalil is a widely used systemic chiral fungicide that is still being employed as a racemic mixture without distinguishing the difference between enantiomers, which often leads to its inaccurate risk assessment. In this study, a robust and highly sensitive chiral separation method was developed for imazalil enantiomers by ultrahigh-performance liquid chromatography-tandem mass spectrometry and was further applied to study the degradation dynamics of imazalil enantiomers in apples and field soils at three sites in China...
April 13, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28376257/the-stiffness-of-a-crosslinked-hyaluronan-hydrogel-affects-its-chondro-induction-activity-on-hadscs
#6
Benjamin Teong, Shun-Cheng Wu, Chien-Mei Chang, Jhen-Wei Chen, Hui-Ting Chen, Chung-Hwan Chen, Je-Ken Chang, Mei-Ling Ho
Matrix stiffness plays an important role in stem cell differentiation. This study reports the synthesis of methacrylated hyaluronan (MeHA) with different degrees of methacrylation, ranging from 15 to 140% per disaccharide unit, which corresponds to a matrix stiffness ranging from 1.5 to 8 KPa. The swelling ratio was inversely proportional to the matrix stiffness, but the water content remained constant at >97% of the hydrogel mass. A fibril-like surface morphology and larger pore size were observed in lyophilized MeHA hydrogel with a lower stiffness...
April 4, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28371212/a-self-deploying-drug-release-device-using-polymeric-films
#7
Taro Kondo, Zhaleh Kashkouli Nezhad, Jin Suzuki, Nobuhiro Nagai, Matsuhiko Nishizawa, Toshiaki Abe, Hirokazu Kaji
Herein, we report a sheet-type device capable of self-deployment and sustained release of protein type drugs. The device consisted of a thin photopolymerized polyethylene glycol dimethacrylate (PEGDM) sheet and collagen microparticles (COLs), which were embedded in the sheet as drug carriers and for increased drug permeation. When the density of the COLs in the sheet was increased to be sufficiently interconnected, the drug permeability was increased. In addition, since protein type drugs electrostatically interacted with the COLs, a prolonged sustained release was possible...
March 29, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28369892/iron-species-determination-by-task-specific-ionic-liquid-based-in-situ-solvent-formation-dispersive-liquid-liquid-microextraction-combined-with-flame-atomic-absorption-spectrometry
#8
Susan Sadeghi, Vahid Ashoori
BACKGROUND: The task specific ionic liquid (TSIL) of 1-N-ethtyl-3-methylimidazolium bromide functionalized with 8-hydroxyquinoline was used as chelating agent and extracting solvent for dispersive liquid-liquid microextraction (DLLME) and subsequent determination of Fe(III) by flame atomic absorption spectrometry(FAAS). The in-situ solvent formation of the TSIL using KPF6 provided the desired water immiscible IL. The total Fe concentration could be determined after preoxidation of Fe(II) to Fe(III)...
March 30, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28346743/fabrication-of-a-mechanically-anisotropic-poly-glycerol-sebacate-membrane-for-tissue-engineering
#9
Chi-Nung Hsu, Pei-Yuan Lee, Ho-Yi Tuan-Mu, Chen-Yu Li, Jin-Jia Hu
Poly(glycerol sebacate) (PGS) has been used successfully as a scaffolding material for soft tissue engineering. PGS scaffolds, however, are usually mechanically isotropic, which may restrict their use in tissue repairs as many soft tissues in the body have anisotropic mechanical behaviors. Although various methods have been used to fabricate anisotropic scaffolds, it remains challenging to make anisotropic scaffolds from thermoset PGS. Here a new, simple method to fabricate an anisotropic PGS membrane which can then be used to construct thicker three-dimensional anisotropic scaffolds was developed...
March 27, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28323388/enhanced-intestinal-absorption-of-curcumin-in-caco-2-cell-monolayer-using-mucoadhesive-nanostructured-lipid-carriers
#10
Sanipon Chanburee, Waree Tiyaboonchai
This study aimed to compare the intestinal permeation of curcumin-loaded polymer coated nanostructured lipid carriers (NLCs) and uncoated NLCs using the Caco-2 cell model. The uncoated NLCs were prepared using a warm microemulsion technique, while polymer-coated NLCs were prepared with the same method but were followed by coating particle surface with polyethylene glycol (PEG) 400 or polyvinyl alcohol (PVA). After lyophilization, all formulations possessed a mean size of <400 nm with a zeta potential of ∼-30 mV and a high entrapment efficacy up to 90%...
March 21, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28306190/natural-polymeric-hydrogel-evaluation-for-skeletal-muscle-tissue-engineering
#11
Beth E Pollot, Christopher R Rathbone, Joseph C Wenke, Teja Guda
Although skeletal muscle has a remarkable ability to repair/regenerate after most types of injuries, there is limited regeneration after volumetric muscle loss (VML). A number of scaffold materials have been used in the development of grafts to treat VML, however, there is still a need to better understand the most appropriate material with regards to its ability to maintain mechanical integrity while also supporting myogenesis. Five commonly used natural polymeric materials (Collagen I, Agarose, Alginate, Fibrin, and Collagen Chitosan) used in skeletal muscle tissue engineering grafts were evaluated for their mechanical properties and myogenic capacity...
March 17, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28296198/mechanical-and-microstructural-analysis-of-a-radially-expandable-vascular-conduit-for-neonatal-and-pediatric-cardiovascular-surgery
#12
Abigail E Loneker, Samuel K Luketich, Doug Bernstein, Arush Kalra, Alan W Nugent, Antonio D'Amore, Denver M Faulk
In pediatric cardiovascular surgery, there is a significant need for vascular prostheses that have the potential to grow with the patient following implantation. Current clinical options consist of nonexpanding conduits, requiring repeat surgeries as the patient outgrows the device. To address this issue, PECA Labs has developed a novel ePTFE vascular conduit with the capability of being radially expanded via balloon catheterization. In the described study, a systematic characterization and comparison of two proprietary ePTFE expandable conduits was conducted...
March 10, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28267521/preparation-and-characterization-of-chitosan-film-incorporated-with-thinned-young-apple-polyphenols-as-an-active-packaging-material
#13
Lijun Sun, Jiaojiao Sun, Lei Chen, Pengfei Niu, Xingbin Yang, Yurong Guo
The objective of this study was to characterize the physical, mechanical and bioactive properties of chitosan film incorporated with thinned young apple polyphenols (YAP). The results indicated that the addition of YAP resulted in a significant increase in the thickness, density, swelling degree, solubility and opacity of chitosan film, but the water content, water vapor permeability and mechanical properties of the film were decreased. Besides, the antioxidant and antimicrobial properties of chitosan film were significantly enhanced by YAP...
May 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28260661/facile-and-scalable-synthesis-of-magnetite-carbon-adsorbents-by-recycling-discarded-fruit-peels-and-their-potential-usage-in-water-treatment
#14
Ji Ma, Shuangshuang Sun, Kezheng Chen
In this study, apple, banana and orange peels were used as precursor compounds for the mass production of magnetite/carbon adsorbents. A so-called "soak-calcination" procedure was employed by firstly soaking these waste fruit peels in FeCl3 aqueous solutions and secondly calcining these precursors in the nitrogen atmosphere to yield final magnetite/carbon composites. This approach is quite simple and effective to synthesize carbon-based adsorbents on an industrial scale. The as-produced adsorbents feature the merits of appropriate ferromagnetism (>4emug(-1)), high adsorption capacity (several hundreds of milligrams per gram for adsorption of methyl blue, Congo red, rhodamine B and Cr(6+) ions), and good regenerability (>85%)...
February 20, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28242946/the-effects-of-biomacromolecules-on-the-physical-stability-of-w-o-w-emulsions
#15
Jinlong Li, Yunping Zhu, Chao Teng, Ke Xiong, Ran Yang, Xiuting Li
The effect of bovine serum albumin (BSA), whey protein isolate (WPI), whey protein hydrolysate (WPH), sodium caseinate (SC), carboxymethylcellulose sodium (CMC), fish gelatin (FG), high methoxyl apple pectin (HMAP), low methoxyl apple pectin (LMAP), gum Arabic (GA), ι-carrageenan (CGN), and hydroxypropyl chitosan (HPCTS) on physical stability of internal or external aqueous phase of water-in-oil-in-water (W/O/W) emulsions was evaluated. WPI and CGN in the internal aqueous phase, and GA, HPCTS, and CMC in the external phase reduced the size of emulsion droplets...
February 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28241661/spectral-sea-surface-reflectance-of-skylight
#16
Xiaodong Zhang, Shuangyan He, Afshin Shabani, Peng-Wang Zhai, Keping Du
In examining the dependence of the sea surface reflectance of skylight ρs on sky conditions, wind speed, solar zenith angle, and viewing geometry, Mobley [Appl. Opt.38, 7442 (1999).10.1364/AO.38.007442] assumed ρs is independent of wavelength. Lee et al. [Opt. Express18, 26313 (2010).10.1364/OE.18.026313] showed experimentally that ρs does vary spectrally due to the spectral difference of sky radiance coming from different directions, which was ignored in Mobley's study. We simulated ρs from 350 nm to 1000 nm by explicitly accounting for spectral variations of skylight distribution and Fresnel reflectance...
February 20, 2017: Optics Express
https://www.readbyqxmd.com/read/28239698/beneficial-effects-of-apple-peel-polyphenols-on-vascular-endothelial-dysfunction-and-liver-injury-in-high-choline-fed-mice
#17
Mengfan Jia, Daoyuan Ren, Yan Nie, Xingbin Yang
This study was designed to investigate the preventive effects of Red Fuji apple peel polyphenolic extract (APP) on vascular endothelial dysfunction and liver injury in mice fed a high choline diet. The mice were fed 3% dietary choline in drinking water for 8 weeks and displayed vascular dysfunction and liver damage (p < 0.01). The administration of APP at 600 and 900 mg per kg bw significantly elevated serum NO, HDL and 6-Keto-PGF1a levels and lowered serum TC, TG, LDL, ET-1 and TXB2 levels in the HC-fed mice...
February 27, 2017: Food & Function
https://www.readbyqxmd.com/read/28208254/electrochemical-detection-of-escherichia-coli-from-aqueous-samples-using-engineered-phages
#18
Danhui Wang, Juhong Chen, Sam R Nugen
In this study, an enzyme-based electrochemical method was developed for the detection of Escherichia coli (E. coli) using the T7 bacteriophages engineered with lacZ operon encoding for beta-galactosidase (β-gal). The T7lacZ phages can infect E. coli, and have the ability to trigger the overexpression of β-gal during the infection of E. coli. The use of the engineered phages resulted in a more sensitive detection of E. coli by (1) overexpression of β-gal in E. coli during the specific infection and (2) release of the endogenous intracellular β-gal from E...
February 7, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28195398/preparation-of-magnetic-mesoporous-silica-composite-for-the-solid-phase-microextraction-of-diazinon-and-malathion-before-their-determination-by-high-performance-liquid-chromatography
#19
Alireza Bazmandegan-Shamili, Ali Mohammad Haji Shabani, Shayessteh Dadfarnia, Masoud Rohani Moghadam, Mahboubeh Saeidi
A novel magnetic mesoporous silica material was synthesized and used as the sorbent for the magnetic solid-phase microextraction of diazinon and malathion before their quantification by high-performance liquid chromatography with UV detection. The sorbent was synthesized by a surfactant-templated one-pot sol-gel procedure using SiO2 -coated Fe3 O4 as the magnetic support, cetyltrimethylammonium bromide as the template and tetraethyl orthosilicate as the silicon source. The characteristics of the prepared sorbent were investigated using Fourier transform infrared spectroscopy, scanning electron microscopy, and X-ray diffraction...
April 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28194931/influence-of-scaffold-design-on-3d-printed-cell-constructs
#20
Auryn Souness, Fernanda Zamboni, Gavin M Walker, Maurice N Collins
Additive manufacturing is currently receiving significant attention in the field of tissue engineering and biomaterial science. The development of precise, affordable 3D printing technologies has provided a new platform for novel research to be undertaken in 3D scaffold design and fabrication. In the past, a number of 3D scaffold designs have been fabricated to investigate the potential of a 3D printed scaffold as a construct which could support cellular life. These studies have shown promising results; however, few studies have utilized a low-cost desktop 3D printing technology as a potential rapid manufacturing route for different scaffold designs...
February 14, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
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