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https://www.readbyqxmd.com/read/28741862/in-vivo-comparison-of-jellyfish-and-bovine-collagen-sponges-as-prototype-medical-devices
#1
Jonathan P Widdowson, Alex J Picton, Valerie Vince, Chris J Wright, Andrew Mearns-Spragg
Jellyfish have emerged as a source of next generation collagen that is an attractive alternative to existing sources, such as bovine and porcine, due to a plentiful supply and providing a safer source through lack of bovine spongiform encephalopathy (BSE) transmission risk and potential viral vectors, both of which could be transmitted to humans. Here we compare collagen implantable sponges derived for the first time from the Rhizostoma pulmo jellyfish. A further novelty for the research was that there was a comparison for sponges that were either uncrosslinked or crosslinked using 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride (EDC), and an assessment on how this affected resorption, as well as their biocompatibility compared to bovine type I collagen sponges...
July 25, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28728424/annals-express-false-negative-results-in-the-immunoassay-analysis-of-drugs-of-abuse-can-adulterants-be-detected-by-sample-check-test
#2
Barbara Matriciani, Bernd Huppertz, Ruprecht Keller, Ralf Weiskirchen
BACKGROUND: The dilution or adulteration of urine is a serious problem in drugs of abuse (DOA) testing. Tests to identify adulteration are currently available. This study investigated the ability of the CEDIA® sample check to detect adulteration. METHODS: Eight different DOAs were added to a urine sample obtained from a healthy, drug free subject: 2-ethylidene-1,5-dimethyl-3,3-diphenylpyrrolidine, 3,4-methylenedioxyamphetamine, benzoylecgonine, D-amphetaminesulfate, ethyl-D-glucuronide, morphine sulfate, oxazepam, (-)-11-nor-9-carboxy-∆(9)-tetrahydrocannabinol...
January 1, 2017: Annals of Clinical Biochemistry
https://www.readbyqxmd.com/read/28699536/supramolecular-self-assembled-nanogels-a-new-platform-for-anticancer-drug-delivery
#3
Jaleh Varshosaz, Somayeh Taymouri, Erfaneh Ghassami
Polymer micellar nanogels are a group of core-shell polymeric micelles with swelling properties in aqueous media. Nanogel systems have proven their potential in controlled, sustained and targetable drug delivery area with no immunological responses. This review includes a comprehensive wide range of self-assembly of polymeric nanogels as delivery systems for anticancer drugs. Nanogels are nanoparticulate drug delivery systems which are specially designed for enhanced target oriented and cellular uptake of drugs with emphasis on chemotherapeutic agents studied in this review...
July 10, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28692891/degradation-studies-of-quizalofop-p-and-related-compounds-in-soils-using-liquid-chromatography-coupled-to-low-and-high-resolution-mass-analyzers
#4
Rosalía López-Ruiz, Roberto Romero-González, José Luis Martínez Vidal, Manuel Fernández-Pérez, Antonia Garrido Frenich
A comprehensive degradation study of quizalofop-p, quizalofop-p-ethyl, quizalofop-p-tefuryl and propaquizafop in soil samples have been firstly performed using ultra high performance liquid chromatography coupled to Orbitrap mass spectrometry (UHPLC-Orbitrap-MS). Thus, metabolites or degradation products, such as CHHQ (dihydroxychloroquinoxalin), CHQ (6-chloroquinoxalin-2-ol), PPA ((R)-2-(4-hydroxyphenoxy)propionic acid) and 2,3-dihydroxyquinoxaline were also monitored. An extraction procedure based on QuEChERS procedure was used...
July 7, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28688172/potential-impact-of-the-sewer-system-on-the-applicability-of-alcohol-and-tobacco-biomarkers-in-wastewater-based-epidemiology
#5
Andrew P W Banks, Foon Yin Lai, Jochen F Mueller, Guangming Jiang, Steve Carter, Phong K Thai
Understanding the actual consumption of alcohol and tobacco in the population is important for forming public health policy. For this purpose, wastewater-based epidemiology has been applied as a complementary method to estimate the overall alcohol and tobacco consumption in different communities. However, the stability of their consumption biomarkers, ethyl sulfate, ethyl glucuronide, cotinine and trans-3'-hydroxycotinine, in the sewer system has not yet been assessed. This study aimed to conduct such assessment using sewer reactors mimicking conditions of rising main, gravity sewer and wastewater alone, over a 12-hour period...
July 8, 2017: Drug Testing and Analysis
https://www.readbyqxmd.com/read/28685869/biomarkers-of-the-alcohol-hangover-state-ethyl-glucuronide-etg-and-ethyl-sulfate-ets
#6
Marlou Mackus, Aurora J A E van de Loo, S Jorinde Raasveld, Anna Hogewoning, Javier Sastre Toraño, Frits M Flesch, Gerdien A H Korte-Bouws, Renier H P van Neer, Xiaochun Wang, Thomas T Nguyen, Karel A Brookhuis, Aletta D Kraneveld, Johan Garssen, Joris C Verster
INTRODUCTION: The aim of this study was to investigate the usefulness of ethyl glucuronide (EtG) and ethyl sulfate (EtS) as biomarkers of the hangover state. METHODS: Thirty-sixhealthy social drinkers participated in this study, being of naturalistic design. Eighteen participants experience regular hangovers (the hangover group), whereas the other 18 claim to not experience a hangover (the hangover-immune group). On a control day (alcohol-free) day and a post-alcohol day, urine EtG and EtS concentrations were determined and hangover severity assessed...
July 6, 2017: Human Psychopharmacology
https://www.readbyqxmd.com/read/28671321/the-influence-of-small-doses-of-ethanol-on-the-urinary-testosterone-to-epitestosterone-ratio-in-men-and-women
#7
Sami Albeiroti, Brian D Ahrens, Timofei Sobolevskii, Anthony W Butch
Endogenous steroid use can increase urinary testosterone/epitestosterone (T/E) values. In addition, ethanol in amounts >0.5 g per kg of body weight (g/kg) can also increase T/E values. However, the effect of smaller doses of ethanol on T/E values is unknown. The influence of 0.2 and 0.4 g/kg of ethanol on baseline T/E values in 20 men and 20 women with low and high baseline T/E values was investigated and correlated with ethyl glucuronide (EtG) and ethyl sulfate (EtS) concentrations. T/E values for 7 of the women were excluded from the study because of undetectable T concentrations or for other reasons...
July 3, 2017: Drug Testing and Analysis
https://www.readbyqxmd.com/read/28658739/targeted-screening-and-safety-evaluation-of-276-agrochemical-residues-in-raisins-using-buffered-ethyl-acetate-extraction-and-liquid-chromatography-tandem-mass-spectrometry-analysis
#8
T P Ahammed Shabeer, Manjusha Jadhav, Rushali Girame, Sandip Hingmire, Aarti Bhongale, Anjali Pudale, Kaushik Banerjee
A buffered ethyl acetate extraction method was optimized and validated in raisin matrix to monitor 276 pesticides by liquid chromatography-tandem mass spectrometry (LC-MS/MS) analysis. The final method involved homogenization of raisinsalong with water 1:1 raisins: water followed by extraction using ethyl acetate (10 mL/10 g raisins homogenate in presence of 0.1 mL acetic acid, 0.5 g sodium acetate and 10 g sodium sulfate, and cleanup by dispersive solid phase extraction with primary secondary amine sorbent (25 mg/5 mL extract)...
October 2017: Chemosphere
https://www.readbyqxmd.com/read/28539735/pharmacognostic-specification-chlorogenic-acid-content-and-in-vitro-antioxidant-activities-of-lonicera-japonica-flowering-bud
#9
Chayanon Chaowuttikul, Chanida Palanuvej, Nijsiri Ruangrungsi
BACKGROUND: Lonicera japonica Thunb. or Japanese Honeysuckle has been widely used in traditional medicine for antipyretic. OBJECTIVE: To establish the pharmacognostic specification of L. japonica flowering bud in Thailand and to determine its chlorogenic acid content and in vitro antioxidant activities. MATERIALS AND METHODS: Dried L. japonica flowering bud from 15 various herbal drugstores throughout Thailand were investigated for pharmacognostic specification...
April 2017: Pharmacognosy Research
https://www.readbyqxmd.com/read/28534923/divergent-syntheses-of-iodinated-isobenzofuranones-and-isochromenones-by-iodolactonization-of-2-alkynylbenzoic-acids-in-ionic-liquids
#10
Raffaella Mancuso, Christian C Pomelli, Francesco Malafronte, Asif Maner, Nadia Marino, Cinzia Chiappe, Bartolo Gabriele
The regiochemical outcome of the iodolactonization of 2-alkynylbenzoic acids, carried out at 100 °C in ionic liquids (ILs) as unconventional solvents and with molecular iodine as the iodine source, in the absence of external bases, was found to be strongly dependent on the nature of the IL medium. In particular, while the use of N-ethyl-N-methylmorpholinium dicyanamide (Mor1,2N(CN)2) promoted the stereoselective formation of (E)-3-(iodomethylene)isobenzofuran-1(3H)-ones, through an anti-5-exo-dig cyclization route, the use of 1-ethyl-3-methylimidazolium ethyl sulfate (EmimEtSO4) tended to favor the 6-endo-dig cyclization mode, with preferential or selective formation of 4-iodo-1H-isochromen-1-ones...
June 7, 2017: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/28458298/biological-activities-and-antibacterial-biomarker-of-sesbania-grandiflora-bark-extract
#11
Pimporn Anantaworasakul, Hiroshi Hamamoto, Kazuhisa Sekimizu, Siriporn Okonogi
In the present study, the fractionated extracts of Sesbania grandiflora bark were prepared and evaluated for their biological activities. The ethyl acetate fractionate (EAF) showed high antioxidant activity along with free radical scavenging and reducing mechanisms. The free radical scavenging antioxidant activity of EAF was 69.3 ± 3.6% where its Trolox equivalent antioxidant capacity was 13.6 ± 0.7 mM/mg. EAF exhibited the reducing power equivalent to ferrous sulfate at 152 ± 2 mM/mg and equivalent to gallic acid at 1...
April 30, 2017: Drug Discoveries & Therapeutics
https://www.readbyqxmd.com/read/28453638/etg-ets-in-serum-by-uhplc-ms-ms-in-suspected-sexual-assault-cases
#12
Solfrid Hegstad, Arne Helland, Cecilie Hagemann, Olav Spigset
A method including semi-automated extraction of ethyl glucuronide (EtG) and ethyl sulfate (EtS) from serum followed by ultra-performance liquid chromatography-tandem mass spectrometry (UHPLC-MS-MS) has been developed and validated. Sample preparation prior to UHPLC-MS-MS analysis consisted of protein precipitation and filtration through a phospholipid removal plate. Chromatography was achieved using an HSS T3 column and gradient elution with formic acid in water in combination with methanol. The mass spectrometer was monitored in the negative mode with multiple reaction monitoring...
April 27, 2017: Journal of Analytical Toxicology
https://www.readbyqxmd.com/read/28447183/optical-and-photophysical-investigation-of-2e-1-2-5-dimethylfuran-3-yl-3-9-ethyl-9h-carbazol-3-yl-prop-2-en-1-one-depo-by-spectrofluorometer-in-organized-medium
#13
Abdullah M Asiri, Al-Anood M Al-Dies, Salman A Khan
(2E)-1-(2,5-dimethylfuran-3-yl)-3-(9-ethyl-9H-carbazol-3-yl)prop-2-en-1-one (DEPO) was prepared by the reaction of 9-ethyl-9H-carbazole-3-carbaldehyde with 1-(2,5-dimethylfuran-3-yl)ethanone under microwave irradiation. The structure of DEPO was established experimentally by EI-MS, FT-IR, (1)H and (13)C NMR spectral studies. Electronic absorption and emission spectra of DEPO were studied in different solvents on the basis of polarities, and the obtain data were used to determine the solvatochromic properties such as extinction coefficient, oscillator strength, transition dipole moment, stokes shift, fluorescence quantum yield and photochemical quantum yield...
April 26, 2017: Journal of Fluorescence
https://www.readbyqxmd.com/read/28417172/simultaneous-determination-of-multiclass-pesticide-residues-in-human-plasma-using-a-mini-quechers-method
#14
Anshuman Srivastava, Satyajeet Rai, Ashish Kumar Sonker, Kajal Karsauliya, Chandra Prabha Pandey, Sheelendra Pratap Singh
Blood is one of the most assessable matrices for the determination of pesticide residue exposure in humans. Effective sample preparation/cleanup of biological samples is very important in the development of a sensitive, reproducible, and robust method. In the present study, a simple, cost-effective, and rapid gas chromatography-tandem mass spectrometry method has been developed and validated for simultaneous analysis of 31 multiclass (organophosphates, organochlorines, and synthetic pyrethroids) pesticide residues in human plasma by means of a mini QuEChERS (quick, easy, cheap, effective, rugged, and safe) method...
April 17, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28335977/simultaneous-determination-of-ethanol-s-four-types-of-non-oxidative-metabolites-in-human-whole-blood-by-liquid-chromatography-tandem-mass-spectrometry
#15
Xinyu Zhang, Feng Zheng, Zebin Lin, Sys Stybe Johansen, Tianfang Yu, Yuming Liu, Zhibin Huang, Jiaolun Li, Jie Yan, Yulan Rao
The importance of ethanol non-oxidative metabolites as the specific biomarkers of alcohol consumption in clinical and forensic settings is increasingly acknowledged. Simultaneous determination of these metabolites can provide a wealth of information like drinking habit and history, but it was difficult to achieve because of their wide range of polarity. This work describes development and validation of a simple liquid chromatography tandem mass spectrometry (LC-MS/MS) assay for 4 types of ethanol non-oxidative metabolites (ethyl glucuronide, ethyl sulfate, fatty acid ethyl esters and phosphatidylethanols) in 50 μL of human whole blood...
April 22, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28334528/why-prodrugs-and-propesticides-succeed
#16
REVIEW
John E Casida
What are the advantages of bioactivation in optimizing drugs and pesticides? Why are there so many prodrugs and propesticides? These questions are examined here by considering compounds selected on the basis of economic value or market success in 2015. The 100 major drugs and 90 major pesticides are divided into ones acting directly and those definitely or possibly requiring bioactivation. Established or candidate prodrugs accounted for 19% of the total drug sales, with corresponding values of 20, 37, and 17% for proinsecticides, proherbicides, and profungicides...
May 15, 2017: Chemical Research in Toxicology
https://www.readbyqxmd.com/read/28304351/the-preparation-and-identification-of-a-monoclonal-antibody-against-citrinin-and-the-development-of-detection-via-indirect-competitive-elisa
#17
Shimuye Kalayu Yirga, Sumei Ling, Yanling Yang, Jun Yuan, Shihua Wang
Citrinin (CTN) is a hepato-nephrotoxic mycotoxin produced by fungi genera of Aspergillus, Monauscus, and Penicillium. CTN contaminates grains, fruits, juices and vegetables, and causes various toxic effects to humans and animals. It has small molecular weight, which is non-immunogenic to animals. Thus, CTN was conjugated to bovine serum albumin (BSA) and ovalbumin (OVA), respectively, by amide bonds using 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride (EDC) and N-hydroxysuccinimide (NHS). Mice were immunized with CTN-BSA conjugates, and spleen cells of the immunized mice were fused with Sp2/0 myeloma cells to obtain 21H27 hybriodoma cell...
March 17, 2017: Toxins
https://www.readbyqxmd.com/read/28289994/determination-of-rhodamine-b-in-food-samples-by-fe3o4-ionic-liquids-%C3%AE-cyclodextrin-cross-linked-polymer-solid-phase-extraction-coupled-with-fluorescence-spectrophotometry
#18
Almojtaba AbdAlkhalig Ahmed Bakheet, Xia Shi Zhu
Fe3O4@Ionic liquids β-cyclodextrin polymer(Fe3O4@ mono-6- deoxy-6- (1-ethyl- imidazolium)-β-cyclodextrin iodide polymer, ILs-β-CDCP) was prepared. A novel method based on Fe3O4@ILs-β-CDCP solid phase extraction coupled with fluorescence spectrophotometry for Rhodamine B (RhB) determination, was investigated. Results were shown that RhB was adsorbed on Fe3O4@ILs-β-CDCP and eluted with sodium dodecyl sulfate (SDS) (1.0%) rapidly. Different parameters, such as pH, adsorption time and volume, eluent volume and time were studied...
March 13, 2017: Journal of Fluorescence
https://www.readbyqxmd.com/read/28272346/a-greener-quick-and-comprehensive-extraction-approach-for-lc-ms-of-multiple-mycotoxins
#19
Andreas Breidbach
In food/feed control, mycotoxin analysis is often still performed "one analyte at a time". Here a method is presented which aims at making mycotoxin analysis environmentally friendlier through replacing acetonitrile by ethyl acetate and reducing chemical waste production by analyzing four mycotoxins together, forgoing sample extract clean-up, and minimizing solvent consumption. For this, 2 g of test material were suspended in 8 mL water and 16 mL ethyl acetate were added. Extraction was accelerated through sonication for 30 min and subsequent addition of 8 g sodium sulfate...
March 7, 2017: Toxins
https://www.readbyqxmd.com/read/28242546/characterization-and-evaluation-of-bioactive-polyphenolic-constituents-from-zanthoxylum-armatum-dc-a-traditionally-used-plant
#20
Zulfa Nooreen, Shilpi Singh, Dhananjay Kumar Singh, Sudeep Tandon, Ateeque Ahmad, Suaib Luqman
Zanthoxylum armatum or Timoor has been used in different traditional system of medicine due to its aromatic properties and also in the treatment of cancer, diarrhea and cholera. In the present investigation, four chemically distinct compounds namely Tambulin (6), Prudomestin (7), Ombuin (8) and 3, 4, 5, 3', 4', 5'-hexahydroxydiphenyl ether (9) have been isolated and quantified from the fruits. To explore the biological activities, we have further studied the antiproliferative, antimicrobial and antioxidant efficacy...
May 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
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