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https://www.readbyqxmd.com/read/28225592/controlling-agglomeration-of-protein-aggregates-for-structure-formation-in-liquid-oil-a-sticky-business
#1
Auke de Vries, Yuly Lopez Gomez, Bas Jansen, Erik van der Linden, Elke Scholten
Proteins are known to be effective building blocks when it comes to structure formation in aqueous environments. Recently, we have shown that submicron colloidal protein particles can also be used to provide structure to liquid oil and form so-called oleogels.1 Preventing extensive agglomeration of these submicron building blocks is a prerequisite to allow for efficient structure formation. This was achieved by applying a solvent exchange procedure to transfer the building blocks from water to oil. The aim of the current paper was to elucidate on the enhanced stability against agglomeration of heat-set whey protein isolate (WPI) aggregates in oil after applying such a solvent exchange procedure...
February 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28224887/facile-and-green-fabrication-of-cellulosed-based-aerogels-for-lampblack-filtration-from-waste-newspaper
#2
Peidong Fan, Yali Yuan, Junkai Ren, Bin Yuan, Qian He, Guangmei Xia, Fengxia Chen, Rui Song
In this study, the lightweight, hydrophobic and porous cellulose-based aerogels (CAGs) were synthesized through a freeze-drying process using waste newspaper as the only raw material. After crosslinking with glutaraldehyde and treatment with trimethylchlorosilane (TMCS) using a simple thermal chemical vapor deposition process, the resulting CAGs became hydrophobic and oleophilic. Furthermore, the as-prepared CAGs exhibited a low density (17.4-28.7mgcm(-3)) and mesoporous inner-structure. All these properties attributed the novel aerogel not only with a good adsorption capability of oils and organic solvents, including kerosene, nitrobenzene, and chloroform, but also an excellent filtration capacity of lampblack...
April 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28221926/evaluation-of-selected-nutrients-and-contaminants-in-distillers-grains-from-ethanol-production-in-texas
#3
Kyung-Min Lee, Timothy J Herrman, Lynn Post
This article contains the results of the evaluation of distillers grain (DG) coproducts from different ethanol plants around the United States and supplemented in animal diets in Texas, based on samples analyzed from 2008 to 2014. The samples were assessed for concentration, occurrence, and prevalence of selected nutrients and contaminants. Protein and sulfur contents of DG were largely different between maize and sorghum coproducts, as well as wet distillers grain with solubles (WDGS) and dried distillers grain with solubles (DDGS), indicating a significant effect of grain feedstock and dry grind process stream on DG composition and quality...
September 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/28219143/-influence-of-collagen-fibroin-scaffolds-containing-silver-nanoparticles-on-dermal-regeneration-of-full-thickness-skin-defect-wound-in-rat
#4
Z G You, L P Zhang, X G Wang, H L Zhou, S X Guo, P Wu, C M Han
Objective: To explore the influence of collagen/fibroin scaffolds containing silver nanoparticles on dermal regeneration of full-thickness skin defect wound in rat. Methods: Eighty-one collagen/fibroin scaffolds containing silver nanoparticles (with the mass concentration of silver nanoparticles as 10 mg/L) and 81 collagen/fibroin scaffolds without silver nanoparticles were produced respectively with freeze-drying method and enrolled as silver nanoparticles scaffold group (SNS) and control scaffold group (CS)...
February 20, 2017: Zhonghua Shao Shang za Zhi, Zhonghua Shaoshang Zazhi, Chinese Journal of Burns
https://www.readbyqxmd.com/read/28215086/salt-segregation-and-sample-cleanup-on-perfluoro-coated-nanostructured-surfaces-for-laser-desorption-ionization-mass-spectrometry-of-biofluid-samples
#5
Ya Zhou, Chen Peng, Kenneth D Harris, Rupasri Mandal, D Jed Harrison
We present a surface assisted laser desorption ionization (SALDI) technique, coupled with fluorocarbon coating, to achieve selective segregation of ionic and/or hydrophilic analytes from background biofluid electrolytes for quantiatve mass spectrometric analysis. By controlling the contact angle of (1H,1H,2H,2H-perfluorooctyl) trichlorosilane or (1H,1H,2H,2H-perfluorooctyl) dimethylchlorosilane to a specific range (105-120°), background electrolytes can be made to segregate from hydrophilic analytes during a drying step on the surface of a highly nanoporous thin film...
February 19, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28203012/-effects-of-saliva-contamination-on-bond-strength-of-resin-resin-interfaces
#6
H J Guo, C Z Gao, F Lin, W Liu, L Yue
OBJECTIVE: To estimate the bond strength between different resin composite interfaces, and to evaluate the effect of saliva contamination and management with the contamination on the bond strength. METHODS: Two commercial resin composites containing different types of fillers (AP-X: barium-glass; P60: quartz) were tested in this study. The basic composite blocks were made of AP-X. After wet-ground flatted, the experimental groups were divided into three groups according to the surface treatment: (1)Direct bonding group: the bonding surface was rinsed with distilled water for 20 s, then dried with oil-free air for 20 s; (2)Saliva contamination group: the bonding surface was bathed in saliva for 30 min, then distilled water was rinsed for 20 s and dried with oil-free air for 20 s; (3)Saliva contamination and 75% ethanol wiping group: bonding surface bathed in saliva for 30 min, then wipe the surface with 75% ethanol, distilled water rinse for 20 s and dry with oil-free air for 20 s; The control group was made of the basic composite bulks of AP-X directly bonding with composite P60...
February 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/28196050/visualization-of-the-macula-in-gas-filled-eyes-spectral-domain-optical-coherence-tomography-versus-swept-source-optical-coherence-tomography
#7
Seong Joon Ahn, Seung Hoon Park, Byung Ro Lee
PURPOSE: To compare the visualization of the macula between spectral domain optical coherence tomography (SD-OCT) and swept-source OCT (SS-OCT) in gas-filled eyes. METHODS: Sixty-one patients with common indications of gas tamponade, including 27 with macular holes and 34 with rhegmatogenous retinal detachment, who were treated with vitrectomy and gas tamponade were imaged using both SD-OCT (3D-OCT 2000, Topcon, Tokyo, Japan) and SS-OCT (DRI-OCT, Topcon) at 1, 3, and 7 days after the surgery...
February 10, 2017: Retina
https://www.readbyqxmd.com/read/28187327/staphylococcal-ecosystem-of-kitoza-a-traditional-malagasy-meat-product
#8
Angela Ratsimba, Sabine Leroy, Jean Paul Chacornac, Danielle Rakoto, Elodie Arnaud, Victor Jeannoda, Régine Talon
Kitoza is a traditional meat product from Madagascar manufactured with strips of pork or beef. The process includes a first step of salting and mixing with spices followed by sun-drying or smoking step. As salting and drying select coagulase-negative staphylococci (CNS), our aim was to identify the CNS species in kitoza with the objective in the future of developing indigenous starters. Microbial analyses revealed that the only pathogenic bacterium enumerated was Staphylococcus aureus, which was found in 54% of the samples...
February 2, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28171806/bedside-rop-screening-and-telemedicine-interpretation-integrated-to-a-neonatal-transport-system-economic-aspects-and-return-on-investment-analysis
#9
Gábor Kovács, Zsolt Somogyvári, Erika Maka, László Nagyjánosi
BACKGROUND AND AIM: Peter Cerny Ambulance Service - Premature Eye Rescue Program (PCA-PERP) uses digital retinal imaging (DRI) with remote interpretation in bedside ROP screening, which has advantages over binocular indirect ophthalmoscopy (BIO) in screening of premature newborns. We aimed to demonstrate that PCA-PERP provides good value for the money and to model the cost ramifications of a similar newly launched system. METHODS: As DRI was demonstrated to have high diagnostic performance, only the costs of bedside DRI-based screening were compared to those of traditional transport and BIO-based screening (cost-minimization analysis)...
February 4, 2017: Early Human Development
https://www.readbyqxmd.com/read/28165864/comprehensive-utilization-of-activated-sludge-for-preparation-of-hydrolytic-enzymes-polyhydroxyalkanoates-and-water-retaining-organic-fertilizer
#10
He Ni, Xiao-Min Fan, Hao-Ning Guo, Jian-Hua Liang, Qing-Rong Li, Liu Yang, Hui Li, Hai-Hang Li
The urban wastewater treatment industry produces a large amount of excess activated sludge which is mainly composed of microbial biomass and costly to be disposed. In this research, a comprehensive utilization of activated sludge was developed by sequentially extracting hydrolytic enzymes and polyhydroxyalkanoates (PHAs), and the residue was used to prepare water-retaining organic fertilizer. The sludge was extracted with 4-fold H2O containing 1% Triton X-100 with the yield of 66.7% protease activity. The enzyme solution was precipitated in 80% acetone and vacuum-dried at 40°C at the dried enzyme yield of 2...
February 6, 2017: Preparative Biochemistry & Biotechnology
https://www.readbyqxmd.com/read/28163231/effects-of-storage-conditions-on-the-stability-of-spray-dried-inhalable-bacteriophage-powders
#11
Sharon S Y Leung, Thaigarajan Parumasivam, Fiona G Gao, Nicholas B Carrigy, Reinhard Vehring, Warren H Finlay, Sandra Morales, Warwick J Britton, Elizabeth Kutter, Hak-Kim Chan
This study aimed to develop inhalable powders containing phages active against antibiotic-resistant Pseudomonas aeruginosa for pulmonary delivery. A Pseudomonas phage, PEV2, was spray dried into powder matrices comprising of trehalose (0-80%), mannitol (0-80%) and L-leucine (20%). The resulting powders were stored at various relative humidity (RH) conditions (0, 22 and 60% RH) at 4°C. The phage stability and in vitro aerosol performance of the phage powders were examined at the time of production and after 1, 3 and 12 months storage...
February 2, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28163134/development-of-a-predictive-model-for-the-stabilizer-concentration-estimation-in-microreservoir-transdermal-drug-delivery-systems-mtdds-using-lipophilic-pressure-sensitive-adhesives-as-matrix-carrier
#12
Clémence Chenevas-Paule, Hans-Michael Wolff, Mark Ashton, Martin Schubert, Kalliopi Dodou
Microreservoir-type transdermal drug delivery systems (MTDDS) can prevent drug crystallization; however no current predictive model considers the impact of drug load and hydration on their physical stability. We investigated MTDDS films containing polyvinylpyrrolidone (PVP) as polymeric drug stabilizer in lipophilic pressure sensitive adhesive (silicone). Medicated and unmedicated silicone films with different molar N-vinylpyrrolidone (VP):drug ratios were prepared and characterized by FTIR, differential scanning calorimetry (DSC), scanning electron microscopy (SEM), microscopy, Dynamic Vapour Sorption (DVS) and stability testing for four months at different storage conditions...
February 2, 2017: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28159268/a-practical-method-for-extending-the-biuret-assay-to-protein-determination-of-corn-based-products
#13
Zelong Liu, Junhui Pan
A modified biuret method suitable for protein determination of corn-based products was developed by introducing a combination of an alkaline reagent with sodium dodecyl sulfate (reagent A) and heat treatments. The method was tested on seven corn-based samples. The results showed mostly good agreement (P>0.05) as compared to the Kjeldahl values. The proposed method was found to enhance the accuracy of prediction on zein content using bovine serum albumin as standard. Reagent A and sample treatment were proved to effectively improve protein solubilization for the thermally-dried corn-based products, e...
June 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28145793/development-and-characterization-of-poly-lactic-co-glycolic-acid-nanoparticles-loaded-with-copaiba-oleoresin
#14
Vinícius Raphael de Almeida Borges, Marina R Tavares, Julianna Henriques da Silva, Lidia Tajber, Fabio Boylan, Ana Ferreira Ribeiro, Luiz Eurico Nasciutti, Lucio Mendes Cabral, Valeria Pereira de Sousa
Copaiba oleoresin (CPO) obtained from Copaifera landgroffii, is described as active to a large number of diseases and more recently in the endometriosis treatment. In this work poly(lactic-co-glycolic acid) (PLGA) nanoparticles containing CPO were obtained using the design of experiments (DOE) as a tool to optimize the production process. The nanoparticles optimized by means of DOE presented an activity in relation to the cellular viability of endometrial cells. The DOE showed that higher amounts of CPO combined with higher surfactant concentrations resulted in better encapsulation efficiency and size distribution along with good stability after freeze drying...
February 1, 2017: Pharmaceutical Development and Technology
https://www.readbyqxmd.com/read/28133538/aerosol-synthesis-of-phase-controlled-iron-graphene-nanohybrids-through-feooh-nanorod-intermediates
#15
X S Lv, Y Qiu, Z Y Wang, G M Jiang, Y T Chen, X H Xu, R H Hurt
Iron-based nanoparticles form the basis for a host of sustainable alternative technologies based on this earth-abundant, low-toxicity element that can adopt a variety of oxidation states, crystal phases, and functions. Control of size, shape, and phase stability is a challenge for many nano-iron-based technologies, especially those involving Fe(0) that is susceptible to oxidation under ambient conditions. This article presents a continuous method for hybridizing Fe-based nanoparticles with carbon in the form of graphene-encapsulated Fe-based particles with core-shell symmetry that allows flexible control of iron particle size, shape, and phase stability...
October 1, 2016: Environmental Science. Nano
https://www.readbyqxmd.com/read/28125949/preparation-and-characterization-of-a-chitosan-galactosylated-hyaluronic-acid-heparin-scaffold-for-hepatic-tissue-engineering
#16
Jinyong Fan, Jun Yang
Cell culture microenvironment and hepatocyte-specific three-dimensional tissue-engineering scaffold play important roles for bioartificial liver devices. In the present study, highly porous sponge scaffolds composed of chitosan (CS) and galactosylated hyaluronic acid (GHA, galactose moieties were covalently coupled with hyaluronic acid through ethylenediamine), were prepared by freezing-drying technique. Because the growth factors specifically bind to heparin with a high affinity and biological stability of the growth factors are modulated by heparin...
April 2017: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/28124036/hierarchical-high-internal-phase-emulsions-and-transparent-oleogels-stabilized-by-quillaja-saponin-coated-nanodroplets-for-color-performance
#17
Xiao-Wei Chen, Jin-Mei Wang, Jian Guo, Zhi-Li Wan, Shou-Wei Yin, Xiao-Quan Yang
Herein, we report novel high internal phase emulsions and transparent oleogels that exhibit a hierarchical configuration by manipulating the spatial assembly of a natural small molecular-weight quillaja saponin for color performance. Quillaja saponin (QS) is a natural triterpenoid bidesmosidic from the soapbark tree (Quillaja saponaria Molina). Fairly monodispersed QS-coated nanodroplets (∼154 nm) were prepared using the ultrasonic emulsification strategy, and then used as block stabilizers for the fabrication of stable oil-in-water high internal phase emulsions (HIPEs, ϕ = 0...
January 26, 2017: Food & Function
https://www.readbyqxmd.com/read/28120896/catalytic-behavior-of-metal-catalysts-in-high-temperature-rwgs-reaction-in-situ-ft-ir-experiments-and-first-principles-calculations
#18
Sungjun Choi, Byoung-In Sang, Jongsup Hong, Kyung Joong Yoon, Ji-Won Son, Jong-Ho Lee, Byung-Kook Kim, Hyoungchul Kim
High-temperature chemical reactions are ubiquitous in (electro) chemical applications designed to meet the growing demands of environmental and energy protection. However, the fundamental understanding and optimization of such reactions are great challenges because they are hampered by the spontaneous, dynamic, and high-temperature conditions. Here, we investigated the roles of metal catalysts (Pd, Ni, Cu, and Ag) in the high-temperature reverse water-gas shift (RWGS) reaction using in-situ surface analyses and density functional theory (DFT) calculations...
January 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28120142/vacuum-drying-for-extending-litchi-shelf-life-vitamin-c-total-phenolics-texture-and-shelf-life-assessment
#19
Felipe Richter Reis, Aline Caroline de Oliveira, Gabriella Giani Pieretti Gadelha, Marcela Breves de Abreu, Hillary Isabelle Soares
In an attempt to obtain shelf-stable litchi fruit with preserved nutritional quality and good sensory features, quarters of peeled and pitted fruits were vacuum dried at 50, 60 and 70 °C at a constant pressure of 8.0 kPa. The product was assessed for its vitamin C, total phenolics and texture (hardness). In addition, the product with the best texture was assessed for its shelf-life by means of accelerated testing. Results suggest that vacuum dried litchi retained almost 70% of the vitamin C and total phenolics when compared to frozen fruits (control)...
January 24, 2017: Plant Foods for Human Nutrition
https://www.readbyqxmd.com/read/28119985/freeze-dried-mos2-sponge-electrodes-for-enhanced-electrochemical-energy-storage
#20
Suresh Kannan Balasingam, Minoh Lee, Byung Hoon Kim, Jae Sung Lee, Yongseok Jun
In the present study, we have synthesized high surface area MoS2 sponge electrodes via a facile hydrothermal method followed by a freeze drying process. The performance of the MoS2 based symmetric capacitor showed a high specific capacitance value of around 128 F g(-1) at a scan rate of 2 mV s(-1), and also a single electrode showed a specific capacitance of 510 F g(-1), which is a remarkable value to be reported for a MoS2 based material in a symmetric device configuration. Also, a high energy density of around 6...
January 25, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
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