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https://www.readbyqxmd.com/read/28306190/natural-polymeric-hydrogel-evaluation-for-skeletal-muscle-tissue-engineering
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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 FTIR spectroscopy, scanning electron microscopy, and X-ray diffraction...
February 13, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28194931/influence-of-scaffold-design-on-3d-printed-cell-constructs
#10
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
https://www.readbyqxmd.com/read/28194874/preparation-and-characterization-of-a-silk-fibroin-calcium-sulfate-bone-cement
#11
Fuzhan Zhang, Hai Zhu, Genlin Wang, Jile Xie, Yunxia Tao, Wei Xia, Huilin Yang
This study aimed to prepare and characterize a silk fibroin/calcium sulfate (SF/CS) bone cement. SF solutions of the following concentrations 3, 4.5, 6, 7.5, and 9 g/L were used to prepare bone cement samples with SF-to-CS ratios of 0.35, 0.40, 0.45, 0.50, and 0.55 mL of SF solutions (or water as control) per g of CS. Compressive strength, setting time, degradation when immersed in phosphate-buffered saline, X-ray diffraction, Fourier infrared spectroscopy, and scanning electron microscopy were used to characterize the SF/CS bone cement...
February 14, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28174579/overexpression-of-mpcys4-a-phytocystatin-gene-from-malus-prunifolia-willd-borkh-enhances-stomatal-closure-to-confer-drought-tolerance-in-transgenic-arabidopsis-and-apple
#12
Yanxiao Tan, Mingjun Li, Yingli Yang, Xun Sun, Na Wang, Bowen Liang, Fengwang Ma
Phytocystatins (PhyCys) comprise a group of inhibitors for cysteine proteinases in plants. They play a wide range of important roles in regulating endogenous processes and protecting plants against various environmental stresses, but the underlying mechanisms remain largely unknown. Here, we detailed the biological functions of MpCYS4, a member of cystatin genes isolated from Malus prunifolia. This gene was activated under water deficit, heat (40°C), exogenous abscisic acid (ABA), or methyl viologen (MV) (Tan et al...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28159244/preparation-of-steppogenin-and-ascorbic-acid-vitamin-e-butylated-hydroxytoluene-oil-in-water-microemulsions-characterization-stability-and-antibrowning-effects-for-fresh-apple-juice
#13
Jing Tao, Qin Zhu, Fang Qin, Mingfu Wang, Jie Chen, Zong-Ping Zheng
Oil-in-water microemulsions (O/W MEs) allow the preparation of insoluble compounds into liquid. In this study, we prepared O/W MEs to improve the solubility and stability of steppogenin (S) in aqueous liquid, and studied their ability to inhibit fresh apple juice browning. The ME technique greatly increased steppogenin solubility up to 3000-fold higher than that in water. All SMEs demonstrated good stability after acceleration and long-term storage. In particular, 0.01% SME was associated with dramatic inhibition of fresh apple juice browning after 24h at room temperature and 7days at 4°C, and its antibrowning effects were further improved when combined with 0...
June 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28117157/direct-competitive-fluoroimmunoassays-for-detection-of-imidaclothiz-in-environmental-and-agricultural-samples-using-quantum-dots-and-europium-as-labels
#14
Xiude Hua, Yuan Ding, Jiachuan Yang, Ming Ma, Haiyan Shi, Minghua Wang
A direct quantum dots-based fluoroimmunoassay (QDFIA) and a time-resolved fluoroimmunoassay (TRFIA) for imidaclothiz (IMI) were developed by using the quantum dots (QDs)-labeled antibody and the europium (Eu(3+))-labeled antibody, respectively. After optimization, the half-maximal inhibition concentration (IC50) and the limit of detection (LOD, IC10) are 20.41 and 0.52μgL(-1) for the QDFIA, while 6.91 and 0.018μgL(-1) for the TRFIA, respectively. The cross-reactivities (CRs) with the analogues are negligible except for imidacloprid with CRs of 29...
January 20, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28101467/some-qualitative-and-rheological-properties-of-virgin-olive-oil-apple-vinegar-salad-dressing-stabilized-with-xanthan-gum
#15
Solmaz Abedinzadeh, Mohammadali Torbati, Sodeif Azadmard-Damirchi
Purpose: Lipid oxidation and rheological properties are the main qualitative parameters determined in food emulsions. Salad dressings are food emulsions important in our daily diet, but conventional salad dressings have high amounts of cholesterol and saturated fatty acids because of egg yolk in their formulations. There are many studies on the modification of salad dressing formulations to replace egg yolk and saturated fats. The present study describes new formulation of salad dressing with olive oil and apple vinegar to produce a functional food product...
December 2016: Advanced Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28089203/carbon-footprint-and-energy-use-of-food-waste-management-options-for-fresh-fruit-and-vegetables-from-supermarkets
#16
Mattias Eriksson, Johanna Spångberg
Food waste is a problem with economic, environmental and social implications, making it both important and complex. Previous studies have addressed food waste management options at the less prioritised end of the waste hierarchy, but information on more prioritised levels is also needed when selecting the best available waste management options. Investigating the global warming potential and primary energy use of different waste management options offers a limited perspective, but is still important for validating impacts from the waste hierarchy in a local context...
January 11, 2017: Waste Management
https://www.readbyqxmd.com/read/28042104/laboratory-bioassays-with-three-different-substrates-to-test-the-efficacy-of-insecticides-against-various-stages-of-drosophila-suzukii-diptera-drosophilidae
#17
Aneliya Koleva Pavlova, Melanie Dahlmann, Mirjam Hauck, Annette Reineke
Rapid worldwide spread and polyphagous nature of the spotted wing Drosophila Drosophila suzukii Matsumura (Diptera: Drosophilidae) calls for efficient and selective control strategies to prevent severe economic losses in various fruit crops. The use of insecticides is one option for management of this invasive pest insect. Efficacy of insecticides is usually assessed first in laboratory bioassays, which are compounded by the cryptic nature of D. suzukii larvae and the fact that fruits used in bioassays often start to rot and dissolve before larvae have reached the adult stage...
January 2017: Journal of Insect Science
https://www.readbyqxmd.com/read/28008718/binary-solvent-based-ionic-liquid-assisted-surfactant-enhanced-emulsification-microextraction-for-the-determination-of-four-fungicides-in-apple-juice-and-apple-vinegar
#18
Xiaochu Chen, Xu Zhang, Fengmao Liu, Fan Hou
A binary-solvent-based ionic-liquid-assisted surfactant-enhanced emulsification microextraction method was developed for the separation/preconcentration and determination of four fungicides (pyrimethanil, fludioxonil, cyprodynil, pyraclostrobin) in apple juice and apple vinegar. A nonchlorinated solvent amyl acetate, which has a lower density than water, was used as the extraction solvent, and an ionic liquid 1-hexyl-3-methylimidazolium hexafluorophosphate, which has a high density and low toxicity, was used as a secondary solvent mixed with the extraction solvent...
December 23, 2016: Journal of Separation Science
https://www.readbyqxmd.com/read/27993542/modification-of-citrus-and-apple-pectin-by-power-ultrasound-effects-of-acid-and-enzymatic-treatment
#19
Nerea Muñoz-Almagro, Antonia Montilla, F Javier Moreno, Mar Villamiel
Pectin-derived oligosaccharides are emerging as a new generation of functional ingredients with new or improved technological and/or bioactive properties as compared to pectin. This work addresses the impact of power ultrasound (US) on the structure of citrus and apple pectin under different experimental conditions of power, amplitude and pectin concentration in aqueous and acid media, as well as in the presence of a pectinase. Results indicated that depolymerisation of both pectin increased with time and intensity of US in aqueous media and their polydispersity decreased...
December 1, 2016: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/27987275/self-assembled-magnetic-nanoparticle-supported-zeolitic-imidazolate-framework-8-an-efficient-adsorbent-for-the-enrichment-of-triazine-herbicides-from-fruit-vegetables-and-water
#20
Lian Zhou, Ping Su, Yulan Deng, Yi Yang
Zeolitic imidazolate frameworks have positive surface charges and high adsorption capabilities. In this work, zeolitic imidazolate frameworks-8 and negatively charged magnetic nanoparticles were self-assembled by electrostatic attraction under sonication. The extraction performance of the synthesized hybrid material was evaluated by using it as a magnetic adsorbent for the enrichment of triazine herbicides in various sample matrices prior to analysis using ultrafast liquid chromatography. The main parameters, that is, extraction time, adsorbent dosage, salt concentration, and desorption conditions, were evaluated...
December 16, 2016: Journal of Separation Science
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