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https://www.readbyqxmd.com/read/27920774/effects-of-tween-80-on-growth-and-biofilm-formation-in-laboratory-media
#1
Christina K Nielsen, Jørgen Kjems, Tina Mygind, Torben Snabe, Rikke L Meyer
Tween 80 is a widely used non-ionic emulsifier that is added to cosmetics, pharmaceuticals, and foods. Because of its widespread use we need to understand how it affects bacteria on our skin, in our gut, and in food products. The aim of this study is to investigate how Tween 80 affects the growth and antimicrobial susceptibility of Staphylococcus aureus, Listeria monocytogenes, and Pseudomonas fluorescens, which are common causes of spoilage and foodborne illnesses. Addition of 0.1% Tween 80 to laboratory growth media increased the growth rate of planktonic S...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27920195/efficacy-of-1-3-diacylglycerol-as-a-fat-emulsifier-in-low-density-diet-for-broilers
#2
S D Upadhaya, J W Park, J H Park, I H Kim
An experiment was conducted to study the effects of dietary supplementation of 1,3-diacylglycerol (DAG) as an emulsifier in a low-density diet on growth performance, nutrient digestibility, blood characteristics, and meat quality in broilers. A total of 480 1-day-old male 308 Ross broiler chicks were randomly allocated into 1 of the following 5 treatments: Control, fed a basal diet (CON), basal diet minus 100 kcal ME diet (LE), T1 (LE + 0.075% 1,3-DAG), T2 (LE + 0.10% 1,3-DAG), and T3 (LE + 0.15% 1,3-DAG)...
December 5, 2016: Poultry Science
https://www.readbyqxmd.com/read/27918966/development-of-novel-cilostazol-loaded-solid-snedds-using-a-spg-membrane-emulsification-technique-physicochemical-characterization-and-in-vivo-evaluation
#3
Omer Mustapha, Kyung Soo Kim, Shumaila Shafique, Dong Shik Kim, Sung Giu Jin, Youn Gee Seo, Yu Seok Youn, Kyung Taek Oh, Beom-Jin Lee, Young Joon Park, Chul Soon Yong, Jong Oh Kim, Han-Gon Choi
The objective of this study was to develop a novel solid self-nanoemulsifying drug delivery system (SNEDDS) using a membrane emulsification technique involving Shirasu porous glass (SPG) which produced very small and uniform emulsion droplets, resulting in enhanced solubility, dissolution and oral bioavailability of poorly water-soluble cilostazol. The effects of carriers on the drug solubility were assessed, and pseudo-ternary phase diagrams were plotted. Among the liquid SNEDDS formulations tested, the liquid SNEDDS composed of peceol (oil), Tween 20 (surfactant) and Labrasol (cosurfactant) at a weight ratio of 15/55/30, produced the smallest emulsion droplet size...
November 29, 2016: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/27917440/solid-flocculation-and-emulsifying-activities-of-the-lipopolysaccharide-produced-by-trichosporon-mycotoxinivorans-cla2
#4
Vitor S Domingues, Andrea S Monteiro, Gabriella Freitas Ferreira, Vera L Santos
The objective of this study was to evaluate the capability of a lipopolysaccharide, produced by Trichosporon mycotoxinivorans CLA2 using residue of biodiesel processing, to flocculate two different solids in suspension. In addition, the emulsifying activity and the stability of this lipopolysaccharide in response to pH and temperature variations and in the presence of some electrolytes were evaluated. The lipopolysaccharide was used in concentrations ranging from 20 to 80 mgL(-1) to flocculate 100 gL(-1) of kaolin and 50 gL(-1) of charcoal...
December 5, 2016: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/27916086/-recombinant-adenovirus-type-5-does-not-aggravate-asthma-symptoms-in-a-mouse-model-of-ovalbumin-induced-asthma
#5
Zhengling Zhang, Yiling Zhang, Jing Han, Ping Lu, Lin Xu
Objective To explore the effect of recombinant adenovirus type 5 (rAd5) on a mouse model of ovalbumin (OVA)-induced asthma. Methods Sixty female C57BL/6 mice (6-8 weeks old and 18-20 g) were randomly divided into 4 groups: healthy control group, rAd5 control group, OVA asthma control group and OVA asthma group with rAd5 immunization. 15 mice in each group. The mice in the OVA asthma control group and the OVA asthma group with rAd5 immunization were sensitized by intraperitoneal injection of 50 μg OVA emulsified in 2 mg of aluminum potassium sulfate on day 0, 7 and 14; subsequently, the mice in the two groups were exposed to OVA aerosol challenge for 3 consecutive days (on day 42, 43 and 44)...
December 2016: Xi Bao Yu Fen Zi Mian Yi Xue za Zhi, Chinese Journal of Cellular and Molecular Immunology
https://www.readbyqxmd.com/read/27915573/solid-dispersions-enhance-solubility-dissolution-and-permeability-of-thalidomide
#6
Silvana A Barea, Cristiane B Mattos, Ariadne C C Cruz, Vitor C Chaves, Rafael N Pereira, Claudia M O Simões, Jadel M Kratz, Letícia S Koester
Thalidomide (THD) is a BCS class II drug with renewed and growing therapeutic applicability. Along with the low aqueous solubility, additional poor biopharmaceutical properties of the drug, i.e. chemical instability, high crystallinity and polymorphism, lead to a slow and variable oral absorption. In this view, we developed solid dispersions (SDs) containing THD dispersed in different self-emulsifying carriers aiming at an enhanced absorption profile for the drug. THD was dispersed in lauroyl macrogol-32 glycerides (Gelucire® 44/14) and α-tocopherol polyethylene glycol succinate (Kolliphor® TPGS),in the presence or absence of the precipitation inhibitor polyvinylpyrrolidone K30 (PVP K30), by means of the solvent method...
December 5, 2016: Drug Development and Industrial Pharmacy
https://www.readbyqxmd.com/read/27914331/fabrication-of-%C3%AE-carotene-nanoemulsion-based-delivery-systems-using-dual-channel-microfluidization-physical-and-chemical-stability
#7
Xiang Luo, Yanyan Zhou, Long Bai, Fuguo Liu, Yihui Deng, David Julian McClements
A considerable research effort is focused on developing effective delivery systems for hydrophobic nutraceuticals. β-carotene, a pro-vitamin A carotenoid, requires encapsulation to improve its water dispersibility and chemical stability in foods. In this study, β-carotene was encapsulated in oil-in-water nanoemulsions fabricated using high-pressure dual-channel microfluidization. Two types of natural emulsifier, quillaja saponins (Q-Naturale) and whey protein isolate (WPI), were capable of producing nanoemulsions (d32=0...
November 16, 2016: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/27912987/gp85-protein-vaccine-adjuvanted-with-silica-nanoparticles-against-alv-j-in-chickens
#8
Jia Cheng, Shiyong Wen, Shenghua Wang, Pan Hao, Ziqiang Cheng, Yongxia Liu, Peng Zhao, Jianzhu Liu
This study focused on the effect of silica nanoparticles as adjuvant for vaccine applications comprised of gp85, a dominating structural protein of J Subgroup Avian Leukosis Virus (ALV-J), and which was evaluated by comparing with the responsiveness induced by that emulsified in Freund adjuvant. Thirty-six chickens were inoculated twice with gp85 adjuvanted with the silica nanoparticles or Freund's adjuvant at the 2nd and 3rd week old. Two weeks later, the inoculated chickens were challenged with a 10(2.2) 50% tissue culture infective dose (TCID50) of ALV-J...
November 29, 2016: Vaccine
https://www.readbyqxmd.com/read/27910752/submicron-emulsions-and-their-applications-in-oral-delivery
#9
Veenu Mundada, Mitali Patel, Krutika Sawant
A "submicron emulsion" is an isotropic mixture of drug, lipids, and surfactants, usually with hydrophilic cosolvents and with droplet diameters ranging from 10 to 500 nm. Submicron emulsions are of increasing interest in medicine due to their kinetic stability, high solubilizing capacity, and tiny globule size. Because of these properties, they have been applied in various fields, such as personal care, cosmetics, health care, pharmaceuticals, and agrochemicals. Submicron emulsions are by far the most advanced nanoparticulate systems for the systemic delivery of biologically active agents for controlled drug delivery and targeting...
2016: Critical Reviews in Therapeutic Drug Carrier Systems
https://www.readbyqxmd.com/read/27907978/comparison-of-the-single-dose-pharmacokinetics-pharmacodynamics-and-safety-of-two-novel-oral-formulations-of-dimethandrolone-undecanoate-dmau-a-potential-oral-male-contraceptive
#10
R Ayoub, S T Page, R S Swerdloff, P Y Liu, J K Amory, A Leung, L Hull, D Blithe, A Christy, J H Chao, W J Bremner, C Wang
Dimethandrolone (DMA, 7α,11β-dimethyl-19-nortestosterone) has both androgenic and progestational activities, ideal properties for a male hormonal contraceptive. In vivo, dimethandrolone undecanoate (DMAU) is hydrolyzed to DMA. We showed previously that single oral doses of DMAU powder in capsule taken with food are well tolerated and effective at suppressing both LH and testosterone (T), but absorption was low. We compared the pharmacokinetics and pharmacodynamics of two new formulations of DMAU, in castor oil and in self-emulsifying drug delivery systems (SEDDS), with the previously tested powder formulation...
December 1, 2016: Andrology
https://www.readbyqxmd.com/read/27904396/moisture-sensitivity-optical-mechanical-and-structural-properties-of-whey-protein-based-edible-films-incorporated-with-rapeseed-oil
#11
Sabina Galus, Justyna Kadzińska
The objective of this work is to study the effect of the rapeseed oil content on the physical properties of whey protein emulsion films. For this purpose, whey protein films with the addition of 0, 1, 2 and 3% of rapeseed oil, and glycerol as a plasticizer were obtained by the casting method. Film-forming emulsions were evaluated and compared using light scattering granulometry. The Sauter mean diameters (d32) of lipid droplets in film-forming solutions showed an increasing trend when increasing the oil volume fractions...
March 2016: Food Technology and Biotechnology
https://www.readbyqxmd.com/read/27892582/lubrication-of-chocolate-during-oral-processing
#12
S A Rodrigues, N Selway, M P Morgenstern, L Motoi, J R Stokes, B J James
The structure of chocolate is drastically transformed during oral processing from a composite solid to an oil/water fluid emulsion. Using two commercial dark chocolates varying in cocoa solids content, this study develops a method to identify the factors that govern lubrication in molten chocolate and saliva's contribution to lubrication following oral processing. In addition to chocolate and its individual components, simulated boluses (molten chocolate and phosphate buffered saline), in vitro boluses (molten chocolate and whole human saliva) and ex vivo boluses (chocolate expectorated after chewing till the point of swallow) were tested...
November 28, 2016: Food & Function
https://www.readbyqxmd.com/read/27890596/monoacyl-phosphatidylcholine-inhibits-the-formation-of-lipid-multilamellar-structures-during-in-vitro-lipolysis-of-self-emulsifying-drug-delivery-systems
#13
Thuy Tran, Scheyla D V S Siqueira, Heinz Amenitsch, Thomas Rades, Anette Müllertz
The colloidal structures formed during lipolysis of self-emulsifying drug delivery systems (SEDDS) might affect the solubilisation and possibly the absorption of drugs. The aim of the current study is to elucidate the structures formed during the in vitro lipolysis of four SEDDS containing medium-chain glycerides and caprylocaproyl polyoxyl-8 glycerides (Labrasol), with or without monoacyl phosphatidylcholine (MAPC). In situ synchrotron small-angle X-ray scattering (SAXS) was combined with ex situ cryogenic transmission electron microscopy (cryo-TEM) and dynamic light scattering (DLS) to elucidate the generated structures...
November 24, 2016: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/27890592/small-particle-size-lipid-emulsions-satiety-and-energy-intake-in-lean-men
#14
Y K Chan, S C Budgett, A K MacGibbon, S Y Quek, S Kindleysides, S D Poppitt
Lipid emulsions have been proposed to suppress hunger and food intake. Whilst there is no consensus on optimal structural properties or mechanism of action, small particle size (small-PS) stable emulsions may have greatest efficacy. Fabuless®, a commercial lipid emulsion reported in some studies to decrease energy intake (EI), is a small-PS, 'hard' fat emulsion comprising highly saturated palm oil base (PS, 82nm). To determine whether small-PS dairy lipid emulsions can enhance satiety, firstly, we investigated 2 'soft' fat dairy emulsions generated using dairy and soy emulsifying agents (PS, 114nm and 121nm) and a non-emulsified dairy control...
November 24, 2016: Physiology & Behavior
https://www.readbyqxmd.com/read/27889889/biosurfactant-production-by-the-crude-oil-degrading-stenotrophomonas-sp-b-2-chemical-characterization-biological-activities-and-environmental-applications
#15
Boutheina Gargouri, María Del Mar Contreras, Sonda Ammar, Antonio Segura-Carretero, Mohamed Bouaziz
In this work, biosurfactant-producing microorganisms were isolated from hydrocarbon-contaminated water collected from Tunisian oilfield. After enrichment and isolation, different bacterial strains were preliminary studied for their biosurfactant/bioemulsifier properties when using crude oil as the unique carbon source. In particular, the isolate strain B-2, a Gram-negative, rod-shaped bacterium, efficiently emulsified crude oil. The extracellular biosurfactant product from this strain presented an emulsification activity above 70% and a hydrophobicity of 71%...
November 26, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27888734/production-and-characterization-of-rhamnolipid-using-palm-oil-agricultural-refinery-waste
#16
Mohd Nazren Radzuan, Ibrahim M Banat, James Winterburn
In this research we assess the feasibility of using palm oil agricultural refinery waste as a carbon source for the production of rhamnolipid biosurfactant through fermentation. The production and characterization of rhamnolipid produced by Pseudomonas aeruginosa PAO1 grown on palm fatty acid distillate (PFAD) under batch fermentation were investigated. Results show that P. aeruginosa PAO1 can grow and produce 0.43gL(-1) of rhamnolipid using PFAD as the sole carbon source. Identification of the biosurfactant product using mass spectrometry confirmed the presence of monorhamnolipid and dirhamnolipid...
November 16, 2016: Bioresource Technology
https://www.readbyqxmd.com/read/27886653/waffle-production-influence-of-baking-plate-material-on-sticking-of-waffles
#17
Regina Huber, Georg Kalss, Regine Schoenlechner
Background of this study was to understand the factors that contribute to sticking of fresh egg waffles on baking plates. The aim of this study was to investigate the sticking (adhesion) behavior of waffles on 4 different baking plate materials (ductile iron, grey iron, low alloyed steel, and steel with titanium nitrite coating) at different baking parameters (temperature and time) and application of 3 different release agents (different fat compositions). Baking plates from ductile and grey iron showed lower release properties of waffles than the 2 steel baking plates...
November 25, 2016: Journal of Food Science
https://www.readbyqxmd.com/read/27886447/synthesis-of-novel-quaternary-silica-hybrid-bioactive-microspheres
#18
A Angelopoulou, E Κ Efthimiadou, G Kordas
PURPOSE: To survey the preparation of novel hybrid microspheres of quaternary silicate glassy composition (SiO2 P2 O5 CaONa2 O) and the prospect of using them as an osteogenic system with enhanced bioactive properties for the development of hydroxyapatite. METHOD: In line with our previous synthetic procedure a two-step process was followed, wherein polystyrene (PS) microspheres were prepared by the emulsifier free-emulsion polymerization method and constituted the core for the sol-gel coating of the silicate inorganic shell...
November 25, 2016: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/27885872/improvement-of-solubility-dissolution-and-stability-profile-of-artemether-solid-dispersions-and-self-emulsified-solid-dispersions-by-solvent-evaporation-method
#19
Muhammad Tayyab Ansari, Muhammad Sohail Arshad, Altaf Hussain, Zeeshan Ahmad
The purpose of this study was to investigate changes in the water solubility of artemether; a poorly soluble drug used for the treatment of malaria. Different solid dispersions (SD) of artemether were prepared using; artemether and polyethyleneglycol 6000 at ratio 12:88 (Group 1), self-emulsified solid dispersions (SESD) containing artemether, polyethylene glycol 6000, cremophor-A-25, olive oil, hydroxypropylmethylcellulose and transcutol in the ratio 12:75:5:4:2:2, respectively (Group 2). SESD's were also prepared by substituting cremophor-A-25 in Group 2 with poloxamer 188 (noted as Group 3)...
November 25, 2016: Pharmaceutical Development and Technology
https://www.readbyqxmd.com/read/27884712/solid-lipid-nanoparticles-for-sustained-pulmonary-delivery-of-yuxingcao-essential-oil-preparation-characterization-and-in-vivo-evaluation
#20
Yun Zhao, Yue-Xing Chang, Xiao Hu, Chun-Yu Liu, Li-Hui Quan, Yong-Hong Liao
The objective of this study was to prepare solid lipid nanoparticles (SLNs) for sustained pulmonary delivery of Yuxingcao essential oil (YEO). Three YEO loaded SLNs (SLN-200, SLN-400 and SLN-800) with different particle size were prepared and separated following a high-shear homogenization technique using Compritol 888 ATO as lipid and polyvinyl alcohol as an emulsifier. The particle size, zeta potential, drug encapsulation efficiency and drug loading of the SLNs were determined to be between 171 and 812nm, -17...
November 21, 2016: International Journal of Pharmaceutics
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