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https://www.readbyqxmd.com/read/29156588/cytotoxicity-of-poly-alkyl-cyanoacrylate-nanoparticles
#1
Einar Sulheim, Tore-Geir Iversen, Vu To Nakstad, Geir Klinkenberg, Håvard Sletta, Ruth Schmid, Anne Rein Hatletveit, Ane Marit Wågbø, Anders Sundan, Tore Skotland, Kirsten Sandvig, Ýrr Mørch
Although nanotoxicology has become a large research field, assessment of cytotoxicity is often reduced to analysis of one cell line only. Cytotoxicity of nanoparticles is complex and should, preferentially, be evaluated in several cell lines with different methods and on multiple nanoparticle batches. Here we report the toxicity of poly(alkyl cyanoacrylate) nanoparticles in 12 different cell lines after synthesizing and analyzing 19 different nanoparticle batches and report that large variations were obtained when using different cell lines or various toxicity assays...
November 18, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29156513/production-and-characterization-of-keratinolytic-proteases-by-a-chicken-feather-degrading-thermophilic-strain-thermoactinomyces-sp-yt06
#2
Lin Wang, Yuting Qian, Yun Cao, Ying Huang, Zhizhou Chang, Hongying Huang
Thermoactinomyces sp. strain YT06 was isolated from poultry compost and observed to degrade integral chicken feathers at 60°C completely, resulting in the formation of 3.24 mg/mL of free amino acid from 50 mL of culture containing 10 g/L chicken feathers. Strain YT06 could grow and secret keratinase using feather as the only carbon and nitrogen sources without other supplement, but complementation of 10 g/L sucrose and 4 g/L NaNO₃ increased the production of the keratinolytic enzyme. The maximum protease activities obtained were 110 U/mL and keratinase were 42 U/mL...
November 21, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29156284/temporal-characterization-and-statistical-analysis-of-flowback-and-produced-waters-and-their-potential-for-reuse
#3
Karl Oetjen, Kevin E Chan, Kristoffer Gulmark, Jan H Christensen, Jens Blotevogel, Thomas Borch, John R Spear, Tzahi Y Cath, Christopher P Higgins
Hydraulic fracturing (HF) has allowed for the utilization of previously unattainable shale oil and gas (O&G) resources. After HF is complete, the waters used to increase the facies' permeability return uphole as wastewaters. When these waters return to the surface, they are characterized by complex organic and inorganic chemistry, and can pose a health risk if not handled correctly. Therefore, these waters must be treated or disposed of properly. However, the variability of these waters' chemical composition over time is poorly understood and likely limits the applicability of their reuse...
November 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29155599/recombinant-fragment-of-human-surfactant-protein-d-a-hierarchical-regulator-of-pulmonary-hypersensitivity
#4
Taruna Madan
No abstract text is available yet for this article.
November 20, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29155458/localization-of-surfactant-protein-d-in-the-rheumatoid-synovial-membrane
#5
Anne Friesgaard Christensen, Grith Lykke Sorensen, Kirsten Junker, Peter Hvidbak Revald, Claus Varnum, Flemming Brandt Sorensen, Peter Junker
Surfactant protein-D (SP-D) is a collectin, which plays an important role in airway protection and inflammation. The molecule has both pro- and anti-inflammatory capacities depending on its molecular size. Its involvement in joint diseases is largely unknown and the aim of this investigation was to study SP-D occurrence and distribution in the synovial membrane of patients with long-standing rheumatoid arthritis (RA) and osteoarthritis (OA). Six RA patients and six OA patients, who underwent total hip arthroplasty, were included in the study...
November 20, 2017: APMIS: Acta Pathologica, Microbiologica, et Immunologica Scandinavica
https://www.readbyqxmd.com/read/29155085/ir-spectroscopy-analysis-of-pancreatic-lipase-related-protein-2-interaction-with-phospholipids-2-discriminative-recognition-of-various-micellar-systems-and-characterization-of-plrp2-dppc-bile-salt-complexes
#6
Eduardo Mateos-Diaz, Priscila Sutto-Ortiz, Moulay Sahaka, Deborah Byrne, Hélène Gaussier, Frédéric Carrière
The interaction of pancreatic lipase-related protein 2 (PLRP2) with various micelles containing phospholipids was investigated using pHstat enzyme activity measurements, differential light scattering, size exclusion chromatography (SEC) and transmission IR spectroscopy. Various micelles of 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) and lysophosphatidylcholine were prepared with either bile salts (sodium taurodeoxycholate or glycodeoxycholate) or Triton X-100, which are substrate-dispersing agents commonly used for measuring phospholipase activities...
November 16, 2017: Chemistry and Physics of Lipids
https://www.readbyqxmd.com/read/29154882/interaction-of-novel-twin-tailed-oxy-diester-functionalized-surfactant-with-lysozyme-spectroscopic-and-computational-perspective
#7
Imtiyaz Ahmad Bhat, Waseem Feeroze Bhat, Mohd Akram, Kabir-Ud-Din
Herein, we have examined the interaction of oxy-diester novel twin tailed (gemini) surfactant, 2,2(')-[(oxybis(ethane-1,2-diyl))bis(oxy)]bis(N-hexadecyl-N,Ndimethyl-2-oxoethanaminium) dichloride (C16-E2O-C16) with hen egg white lysozyme (HEWL), utilizing a spectroscopic and molecular docking techniques. Steady-state fluorescence infers ground state C16-E2O-C16-HEWL complex formation. Other spectroscopic results validated the conformational, structural and micro-environmental changes in HEWL upon interaction with C16-E2O-C16...
November 14, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29154881/influence-of-polymer-ratio-and-surfactants-on-controlled-drug-release-from-cellulosic-microsponges
#8
Yasser Shahzad, Sidra Saeed, Muhammad Usman Ghori, Tariq Mahmood, Abid Mehmood Yousaf, Muhammad Jamshaid, Rizwan Sheikh, Syed A A Rizvi
Microsponge refers to a highly cross-linked particle system with a capacity to adsorb (like a dry sponge) pharmaceutical materials. There are various methods available to prepare microsponge formulations, in this study we used quasi emulsion-solvent diffusion method with a combination of hydrophobic (ethyl cellulose) and hydrophilic polymers (hydroxypropyl methylcellulose) mediated via Tween 80 and polyvinyl alcohol. Various ratios and amounts of the polymers and surfactants were used to prepare microsponge formulations using ketoprofen as a model drug and extensively characterised...
November 14, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29153998/determination-of-isoquercitrin-in-rat-plasma-by-high-performance-liquid-chromatography-coupled-with-a-novel-synergistic-cloud-point-extraction
#9
Jun Zhou, Jiang Bing Sun, Qiao Feng Wang
A novel improved preconcentration method known as synergistic cloud point extraction was established for isoquercitrin preconcentration and determination in rat plasma prior to its determination by high performance liquid chromatography. Synergistic cloud point extraction greatly simplified isoquercitrin extraction and detection. This method was accomplished at room temperature (about 22°C) in 1min with the nonionic surfactant Tergitol TMN-6 as the extractant, n-octanol as cloud point revulsant and synergic reagent...
November 12, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/29153984/influence-of-mixed-additives-on-the-physicochemical-properties-of-a-5-25-sodium-hypochlorite-solution-an-unsupervised-multivariate-statistical-approach
#10
Oana Dragan, Ioan Tomuta, Dorina Casoni, Costel Sarbu, Radu Campian, Tiberiu Frentiu
INTRODUCTION: This article reports for the first time the effects of multiple additives (polyethylene glycol 400, Triton X-100, benzalkonium chloride, and ethyl formate) on the surface tension, pH, and viscosity of 5.25% sodium hypochlorite (NaOCl) irrigant solution. Advanced statistical approaches based on unsupervised multivariate analysis (cluster analysis and principal component analysis) were used to quantify the variability of the physicochemical properties of the modified NaOCl solution for the first time in dentistry...
November 16, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/29153579/liquid-chromatography-coupled-to-quadrupole-orbitrap-high-resolution-mass-spectrometry-based-method-for-target-analysis-and-suspect-screening-of-non-ionic-surfactants-in-textiles
#11
Xin Luo, Li Zhang, Zengyuan Niu, Xiwen Ye, Zhixu Tang, Shuwei Xia
In this study, we describe a high-throughput and sensitive method for textiles analysis, using liquid chromatography coupled to quadrupole-Orbitrap high resolution mass spectrometry (LC-Q-Orbitrap HRMS), for the simultaneously quantitative analysis of 40 target alkylphenol polyethoxylates (APEO) oligomers with reference standards and screening of 160 alcohol polyethoxylates (AEO) oligomers without standards in textiles. The APEOs contain nonylphenol ethoxylates (NPEOs) and octylphenol ethoxylates (OPEOs) with an EO number of ethylene oxide of 1-20, while AEOs focus on C11EOs-C18EOs with an EO number of 1-20...
November 7, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/29153028/annals-express-development-of-a-simple-indocyanine-green-measurement-method-using-an-automated-biochemical-analyzer
#12
Yuka Sato, Masanori Seimiya, Toshihiko Yoshida, Yuji Sawabe, Eisaku Hokazono, Susumu Osawa, Kazuyuki Matsushita
Background The indocyanine green (ICG) retention rate is important for assessing the severity of liver disorders. In the conventional method, blood needs to be collected twice. In the present study, we developed an automated ICG method that does not require blood sampling before intravenous ICG injections and is applicable to an automated biochemical analyzer. Methods The sera of 471 patients collected before and after intravenous ICG injections and submitted to the clinical laboratory of our hospital were used as samples...
January 1, 2017: Annals of Clinical Biochemistry
https://www.readbyqxmd.com/read/29151471/-radiochromic-hydrogel-dosimeters
#13
Shuji Usui
Radiochromic hydrogel dosimeters are a useful tool for the verification of 3D dose distributions using optical CT scanners which are lower cost and with higher spatial resolution in a limited time than MRI scanners. In this paper, recent development of radiochromic micelle gel and genipin-gelatin gel dosimeters are described. They have the advantage of water equivalency, low or no diffusion property, and lower toxicity. Micelle gels consist of leuco dye, surfactant, radical initiator (halocarbons), and gelling agent...
2017: Japanese Journal of Medical Physics
https://www.readbyqxmd.com/read/29151462/-evaluation-of-radiochromic-gel-dosimeter-and-optical-ct
#14
Munehiro Yonehara, Ryo Wakana, Kazuhisa Sakakibara, Jun'ichi Kotoku, Takanori Kobayashi, Hiroaki Gotoh
Three-dimensional (3D) radiation dosimeter has received growing interest with the implementation of highly conformal radiotherapy treatments. Optical Computed tomography (CT) scanners have been developed for 3D quantitative measurement of optical attenuation. Malachite green and Leuco Crystal Violet (LCV) dye radiochromic gels were recently developed as radiation dosimeters in combination with optical CT scanners. Malachite green and LCV are colorless dyes and they become green or violet after irradiation, respectively...
2017: Japanese Journal of Medical Physics
https://www.readbyqxmd.com/read/29150729/effect-of-microemulsion-structure-on-fluorescence-and-nonlinear-optical-properties-of-rhodamine-6g
#15
M Pourtabrizi, N Shahtahmassebi, A Kompany, S Sharifi
This study is conducted to investigate the effect of nano-droplets concentration and size on linear and nonlinear optical properties of Rhodamine 6G by UV-Vis, spectrofluorometer and Z-Scan techniques. Nano-droplets were prepared by mixture of AOT, n-Decane and Water at three different water to surfactant molar ratios (W = 3, 6.7 and 40) and two dye to water mass ratios (R). At high enough dye concentration, the fluorescence intensity and its red shift depend on the concentration of dye in water nano-droplets (R)...
November 18, 2017: Journal of Fluorescence
https://www.readbyqxmd.com/read/29150411/an-epithelial-biomarker-signature-for-idiopathic-pulmonary-fibrosis-an-analysis-from-the-multicentre-profile-cohort-study
#16
Toby M Maher, Eunice Oballa, Juliet K Simpson, Joanne Porte, Anthony Habgood, William A Fahy, Aiden Flynn, Philip L Molyneaux, Rebecca Braybrooke, Hrushikesh Divyateja, Helen Parfrey, Doris Rassl, Anne-Marie Russell, Gauri Saini, Elisabetta A Renzoni, Anne-Marie Duggan, Richard Hubbard, Athol U Wells, Pauline T Lukey, Richard P Marshall, R Gisli Jenkins
BACKGROUND: Idiopathic pulmonary fibrosis (IPF) is a progressive, fatal disorder with a variable disease trajectory. The aim of this study was to assess potential biomarkers to predict outcomes for people with IPF. METHOD: PROFILE is a large prospective longitudinal cohort of treatment-naive patients with IPF. We adopted a two-stage discovery and validation design using patients from the PROFILE cohort. For the discovery analysis, we examined 106 patients and 50 age and sex matched healthy controls from Nottingham University Hospitals NHS Trust and the Royal Brompton Hospital...
November 14, 2017: Lancet Respiratory Medicine
https://www.readbyqxmd.com/read/29150015/the-flotation-and-adsorption-of-mixed-collectors-on-oxide-and-silicate-minerals
#17
REVIEW
Longhua Xu, Jia Tian, Houqin Wu, Zhongyuan Lu, Wei Sun, Yuehua Hu
The analysis of flotation and adsorption of mixed collectors on oxide and silicate minerals is of great importance for both industrial applications and theoretical research. Over the past years, significant progress has been achieved in understanding the adsorption of single collectors in micelles as well as at interfaces. By contrast, the self-assembly of mixed collectors at liquid/air and solid/liquid interfaces remains a developing area as a result of the complexity of the mixed systems involved and the limited availability of suitable analytical techniques...
November 11, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/29149889/electronic-cigarette-vapor-alters-the-lateral-structure-but-not-tensiometric-properties-of-calf-lung-surfactant
#18
Rebecca J Przybyla, Jason Wright, Rajan Parthiban, Saeed Nazemidashtarjandi, Savas Kaya, Amir M Farnoud
BACKGROUND: Despite their growing popularity, the potential respiratory toxicity of electronic cigarettes (e-cigarettes) remains largely unknown. One potential aspect of e-cigarette toxicity is the effect of e-cigarette vapor on lung surfactant function. Lung surfactant is a mixture of lipids and proteins that lines the alveolar region. The surfactant layer reduces the surface tension of the alveolar fluid, thereby playing a crucial role in lung stability. Due to their small size, particulates in e-cigarette vapor can penetrate the deep lungs and come into contact with the lung surfactant...
November 17, 2017: Respiratory Research
https://www.readbyqxmd.com/read/29149883/serum-concentrations-of-krebs-von-den-lungen-6-surfactant-protein-d-and-matrix-metalloproteinase-2-as-diagnostic-biomarkers-in-patients-with-asbestosis-and-silicosis-a-case-control-study
#19
Changjiang Xue, Na Wu, Xue Li, Meihua Qiu, Xuqin Du, Qiao Ye
BACKGROUND: Asbestosis and silicosis are progressive pneumoconioses characterized by interstitial fibrosis following exposure to asbestos or silica dust. We evaluated the potential diagnostic biomarkers for these diseases. METHODS: The serum concentrations of Krebs von den Lungen-6 (KL-6), surfactant protein D (SP-D), and matrix metalloproteinase-2 (MMP-2), MMP-7, and MMP-9 were measured in 43 patients with asbestosis, 45 patients with silicosis, 40 dust-exposed workers (DEWs) without pneumoconiosis, and 45 healthy controls (HCs)...
November 17, 2017: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/29149748/in-situ-long-term-modeling-of-phenanthrene-dynamics-in-an-aged-contaminated-soil-using-the-vsoil-platform
#20
Khaled Brimo, Patricia Garnier, François Lafolie, Geoffroy Séré, Stéphanie Ouvrard
Management and remediation actions of polycyclic aromatic hydrocarbons (PAH) contaminated sites require an accurate knowledge of the dynamics of these chemicals in situ under real conditions. Here we developed, under the Virtual Soil Platform, a global model for PAH that describes the principal physical and biological processes controlling the dynamics of PAH in soil under real climatic conditions. The model was applied first to simulate the observed dynamics of phenanthrene in situ field experimental plots of industrial contaminated soil...
November 14, 2017: Science of the Total Environment
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