keyword
MENU ▼
Read by QxMD icon Read
search

Liquids

keyword
https://www.readbyqxmd.com/read/29332004/host-agent-vector-environment-measures-for-electronic-cigarette-research-used-in-nih-grants
#1
Mary L Garcia-Cazarin, Rachel J Mandal, Rachel Grana, Kay L Wanke, Helen I Meissner
OBJECTIVE: The purpose of this study is to describe the focus and comprehensiveness of domains measured in e-cigarette research. METHODS: A portfolio analysis of National Institutes of Health grants focusing on e-cigarette research and funded between the fiscal years 2007 and 2015 was conducted. Grant proposals were retrieved using a government database and coded using the Host-Agent-Vector-Environment (HAVE) model as a framework to characterise the measures proposed...
January 13, 2018: Tobacco Control
https://www.readbyqxmd.com/read/29331956/adenosine-production-by-biomaterial-supported-mesenchymal-stromal-cells-reduces-the-innate-inflammatory-response-in-myocardial-ischemia-reperfusion-injury
#2
Eric Y Shin, Lanfang Wang, Marina Zemskova, Juline Deppen, Kai Xu, Frederick Strobel, Andrés J García, Rabindra Tirouvanziam, Rebecca D Levit
BACKGROUND: During myocardial ischemia/reperfusion (MI/R) injury, there is extensive release of immunogenic metabolites that activate cells of the innate immune system. These include ATP and AMP, which upregulate chemotaxis, migration, and effector function of early infiltrating inflammatory cells. These cells subsequently drive further tissue devitalization. Mesenchymal stromal cells (MSCs) are a potential treatment modality for MI/R because of their powerful anti-inflammatory capabilities; however, the manner in which they regulate the acute inflammatory milieu requires further elucidation...
January 13, 2018: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29331893/ambient-volatile-organic-compounds-vocs-in-communities-of-the-athabasca-oil-sands-region-sources-and-screening-health-risk-assessment
#3
Md Aynul Bari, Warren B Kindzierski
An investigation of ambient levels and sources of volatile organic compounds (VOCs) and associated public health risks was carried out at two northern Alberta oil sands communities (Fort McKay and Fort McMurray located < 25 km and >30 km from oil sands development, respectively) for the period January 2010-March 2015. Levels of total detected VOCs were comparatively similar at both communities (Fort McKay: geometric mean = 22.8 μg/m3, interquartile range, IQR = 13.8-41 μg/m3); (Fort McMurray: geometric mean = 23...
January 11, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29331859/development-of-a-method-to-determine-axitinib-lapatinib-and-afatinib-in-plasma-by-micellar-liquid-chromatography-and-validation-by-the-european-medicines-agency-guidelines
#4
Jaume Albiol-Chiva, Josep Esteve-Romero, Juan Peris-Vicente
A method based on micellar liquid chromatography to quantify the tyrosine kinase inhibitors axitinib, lapatinib and afatinib in plasma is reported. The sample pretreatment was a simple 1/5-dilution in a pure micellar solution, filtration and direct injection, without requiring extraction or purification steps. The three drugs were resolved from the matrix in 17min, using an aqueous solution of 0.07M sodium dodecyl sulfate - 6.0% 1-pentanol, buffered at pH7 with 0.01M phosphate salt as mobile phase, running under isocratic mode at 1mL/min through a C18 column...
January 2, 2018: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/29331819/new-strategy-for-determination-of-anthocyanins-polyphenols-and-antioxidant-capacity-of-brassica-oleracea-liquid-extract-using-infrared-spectroscopies-and-multivariate-regression
#5
Isadora R N de Oliveira, Jussara V Roque, Mariza P Maia, Paulo C Stringheta, Reinaldo F Teófilo
A new method was developed to determine the antioxidant properties of red cabbage extract (Brassica oleracea) by mid (MID) and near (NIR) infrared spectroscopies and partial least squares (PLS) regression. A 70% (v/v) ethanolic extract of red cabbage was concentrated to 9° Brix and further diluted (12 to 100%) in water. The dilutions were used as external standards for the building of PLS models. For the first time, this strategy was applied for building multivariate regression models. Reference analyses and spectral data were obtained from diluted extracts...
January 4, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29331815/chemometric-simultaneous-determination-of-sofosbuvir-and-ledipasvir-in-pharmaceutical-dosage-form
#6
Mahsa Khalili, Mahmoud Reza Sohrabi, Vahid Mirzabeygi, Nahid Torabi Ziaratgahi
Partial least squares (PLS), different families of continuous wavelet transform (CWT), and first derivative spectrophotometry (DS) techniques were studied for quantification of Sofosbuvir (SFB) and Ledipasvir (LDV) simultaneously without separation step. The components were dissolved in Acetonitrile and the spectral behaviors were evaluated in the range of 200 to 400nm. The ultraviolet (UV) absorbance of LDV exhibits no interferences between 300 and 400nm and it was decided to predict the LDV amount through the classic spectrophotometry (CS) method in this spectral region as well...
January 6, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29331812/evidence-of-c-f-p-and-aromatic-%C3%AF-f-p-weak-interactions-in-imidazolium-ionic-liquids-and-its-consequences
#7
Sumit Kumar Panja, Nitin Srivastava, Jyoti Srivastava, Namburi Eswara Prasad, Hemanth Noothalapati, Shinsuke Shigeto, Satyen Saha
A simple change from alkyl group to alkene in side chain of imidazolium cation with same anion resulted in a drastic impact on physical properties (e.g., melting point) from bmimPF6 IL to cmimPF6 IL. The underlying reasons have been elucidated by structural and interaction studies with the help of DSC, SCXRD, vibrational and multi-nuclear NMR spectroscopic techniques. Experiments reveal existence of new weak interactions involving the carbon and π cloud of the imidazolium aromatic ring with fluoride of PF6 anion (i...
December 19, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29331796/determination-of-meropenem-in-endotracheal-tubes-by-in-tube-solid-phase-microextraction-coupled-to-capillary-liquid-chromatography-with-diode-array-detection
#8
L Hakobyan, J Pla Tolos, Y Moliner-Martinez, C Molins-Legua, Jesús Ruiz Ramos, M Gordon, Paula Ramirez-Galleymore, P Campins-Falco
Meropenem is a widely used antimicrobial for the treatment of infections associated with the use of invasive medical devices in intensive care unit patients. These treatments are not always effective, in fact, in-vitro studies have demonstrated the difficulty of antimicrobials to penetrate into the biofilm, however in-vivo studies of the effect of these compounds is a trend, mostly because of the complexity of pulmonary samples extracted from ETTs. Therefore, the objective of this study was to evaluate in-tube solid phase microextraction (in-tube SPME) coupled to capillary liquid chromatography (CapLC) with DAD to determine meropenem in ETTs in order to estimate the penetration capability into the biofilm...
January 8, 2018: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/29331795/development-and-validation-of-an-uhplc-ms-ms-approach-for-simultaneous-quantification-of-five-bioactive-saponins-in-rat-plasma-application-to-a-comparative-pharmacokinetic-study-of-aqueous-extracts-of-raw-and-salt-processed-achyranthes-bidentata
#9
Yi Tao, Yingshan Du, Weidong Li, Baochang Cai
A simple, accurate and sensitive ultra high-performance liquid chromatography-tandem mass spectrometry approach was established for the simultaneous determination of β-ecdysterone, 25S-inokosterone, ginsenoside Ro, chikusetsusaponin IV and chikusetsusaponin IVa in rat plasma after oral administration of raw and salt-processed Achyranthes bidentata extract. The saponins were completely separated on a Waters BEH C18 UHPLC column by using acetonitrile/0.1% formic acid-water as mobile phases. The mass analysis was performed in a triple quadrupole mass spectrometer using multiple reaction monitoring (MRM) with negative scan mode...
January 9, 2018: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/29331780/application-of-octanohydroxamic-acid-for-liquid-liquid-extraction-of-manganese-oxides-and-fabrication-of-supercapacitor-electrodes
#10
J Milne, I Zhitomirsky
MnO2 and Mn3O4 particles were prepared by wet chemical methods and efficiently dispersed and mixed with multiwalled carbon nanotubes (MWCNT) for the fabrication of composite MnO2-MWCNT and Mn3O4-MWCNT electrodes for electrochemical supercapacitors (ES). The problem of particle agglomeration was addressed by particle extraction through a liquid-liquid interface (PELLI) using octanohydroxamic acid (OHA) as a new extractor. OHA exhibited remarkable adsorption on particles due to a bidentate bonding mechanism. The use of OHA broadened the application of PELLI technology, because it allowed good extraction of particles from an aqueous phase at high pH...
January 6, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29331744/urinary-metabolomics-study-the-mechanism-of-taohong-siwu-decoction-intervention-in-acute-blood-stasis-model-rats-based-on-liquid-chromatography-coupled-to-quadrupole-time-of-flight-mass-spectrometry
#11
Xiaosong Zhang, Pengling Li, Yongli Hua, Peng Ji, Wanling Yao, Qi Ma, Ziwen Yuan, Yanqiao Wen, Chaoxue Yang, Yanming Wei
Taohong Siwu Decoction (TSD) is a classic prescription in traditional Chinese medicine and is widely used to promote blood circulation to remove blood stasis. However, the effect mechanisms are not yet well understood. Here, a urinary metabolomic approach based on liquid chromatography coupled to quadrupole time-of-flight mass spectrometry (LC/Q-TOF-MS) was conducted to explore the changes in the endogenous metabolites and to assess the integral efficacy of TSD on acute blood stasis model rats. Then, parameters for hemorheology and coagulation functions were detected...
January 2, 2018: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/29331742/a-sensitive-and-selective-immunoaffinity-column-clean-up-coupled-to-uplc-ms-ms-for-determination-of-trace-methyl-3-quinoxaline-2-carboxylic-acid-in-animal-tissues
#12
Peipei Li, Xiaojun Zhang, Juanmei Zhang, Zhongyong Yan, Shuai Zhang, Si Chen, Yi Fang
This paper described a reliable and simple method for the selective determination of MQCA in animal tissues using ultra high performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS). A highly targeted immunoaffinity column was used for sample purification after enzymatic hydrolysis. The purified extracts were analyzed by reversed-phase HPLC-MS/MS in positive ESI and multiple reaction monitoring mode. The calibration curves showed good linearity with correlation coefficient (r2) larger than 0...
January 3, 2018: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/29331713/repeated-attempted-homicide-by-administration-of-drugs-documented-by-hair-analysis
#13
Valérie Baillif-Couniou, Christophe Bartoli, Caroline Sastre, Marjorie Chèze, Marc Deveaux, Georges Léonetti, Anne-Laure Pélissier-Alicot
Attempted murder by repeated poisoning is quite rare. The authors describe the case of a 62-year-old man who was admitted to an intensive care unit (ICU) for neurological disturbances complicated by inhalation pneumopathy. He presented a loss of consciousness while his wife was visiting him at the ICU (H0). Forty-eight hours later (H48), police officers apprehended the patient's wife pouring a liquid into his fruit salad at the hospital. Toxicological analyses of a blood sample and the infusion equipment (H0), as well as the fruit salad and its container (H48), confirmed the attempted poisoning with cyamemazine (H0) and hydrochloric acid (H48)...
January 5, 2018: Journal of Forensic and Legal Medicine
https://www.readbyqxmd.com/read/29331639/identification-of-the-disinfection-byproducts-of-bisphenol-s-and-the-disrupting-effect-on-peroxisome-proliferator-activated-receptor-gamma-ppar%C3%AE-induced-by-chlorination
#14
Sai Zheng, Jiachen Shi, Jing Zhang, Yi Yang, Jianying Hu, Bing Shao
Bisphenol S (BPS), an alternative product to bisphenol A (BPA), has been the focus of increasing public concern due to its potential endocrine disrupting effect and its adverse effects related to metabolic disorders such as obesity. The detection of its residue in drinking water supply systems suggests that BPS can be chlorinated; however, whether its endocrine disrupting effect can be disrupted by this chlorination remains unclear. In the present study, we identified the byproducts of the reaction of BPS with chlorine and assessed the effect of the main byproducts on peroxisome proliferator-activated receptor gamma (PPARγ)...
January 5, 2018: Water Research
https://www.readbyqxmd.com/read/29331564/direct-renin-inhibition-is-not-enough-to-prevent-reactive-oxygen-species-generation-and-vascular-dysfunction-in-renovascular-hypertension
#15
Alisson Martins-Oliveira, Danielle A Guimaraes, Carla S Ceron, Elen Rizzi, Diogo M M Oliveira, Carlos R Tirapelli, Dulce E Casarini, Fernanda B Fernandes, Lucas C Pinheiro, Jose E Tanus-Santos
Renin-angiotensin system activation promotes oxidative stress and endothelial dysfunction. However, no previous study has examined the effects of the renin inhibitior aliskiren, either alone or combined with angiotensin II type 1 antagonists on alterations induced by two-kidney, one-clip (2K1C) hypertension. We compared the vascular effects of aliskiren (50mg/kg/day), losartan (10mg/kg/day), or both by gavage for 4 weeks in 2K1C and control rats. Treatment with losartan, aliskiren, or both exerted similar antihypertensive effects...
January 10, 2018: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29331518/microwave-assisted-ionic-liquid-mediated-rapid-catalytic-conversion-of-non-edible-lignocellulosic-sunn-hemp-fibres-to-biofuels
#16
Souvik Kumar Paul, Saikat Chakraborty
Sunn hemp fibre - a cellulose-rich crystalline non-food energy crop, containing 75.6% cellulose, 10.05% hemicellulose, 10.32% lignin, with high crystallinity (80.17%) and degree of polymerization (650) - is identified as a new non-food substrate for lignocellulosic biofuel production. Microwave irradiation is employed to rapidly rupture the cellulose's glycosidic bonds and enhance glucose yield to 78.7% at 160 °C in only 46 min. The reactants - long-chain cellulose, ionic liquid, transition metal catalyst, and water - form a polar supramolecular complex that rotates under the microwave's alternating polarity and rapidly dissipates the electromagnetic energy through molecular collisions, thus accelerating glycosidic bond breakage...
January 3, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29331509/selenolanthionine-is-the-major-water-soluble-selenium-compound-in-the-selenium-tolerant-plant-cardamine-violifolia
#17
Eszter Borbála Both, Shuxun Shao, Jiqian Xiang, Zsuzsa Jókai, Hongqing Yin, Yafeng Liu, Anna Magyar, Mihály Dernovics
BACKGROUND: Selenium hyperaccumulation in plants often involves the synthesis of non-proteinaceous methylated selenoamino acids serving for the elimination of excess selenium from plant metabolism to protect plant homeostasis. METHODS: Our study aimed at the identification of the main selenium species of the selenium hyperaccumulator plant Cardamine violifolia (Brassicaceae) that grows in the wild in the seleniferous region of Enshi, China. A sample of this plant (3...
January 10, 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29331466/high-grain-diets-supplemented-with-phytogenic-compounds-or-autolyzed-yeast-modulate-ruminal-bacterial-community-and-fermentation-in-dry-cows
#18
V Neubauer, R Petri, E Humer, I Kröger, E Mann, N Reisinger, M Wagner, Q Zebeli
The feeding of concentrate-rich diets may lead to microbial imbalances and dysfermentation in the rumen. The main objective of this study was to determine the effects of supplementing phytogenic compounds (PHY) or autolyzed yeast (AY) on rumen fermentation and microbial abundance in cows intermittently fed concentrate-rich diets. The experiment was carried out as an incomplete 3 × 4 Latin square design, with 8 nonlactating rumen-fistulated Holstein-Friesian cows. The cows were randomly assigned to a concentrate diet that was either not supplemented (CON), or supplemented with PHY or AY...
January 10, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29331374/alternative-pathway-of-h2s-and-polysulfides-production-from-sulfurated-catalytic-cysteine-of-reaction-intermediates-of-3-mercaptopyruvate-sulfurtransferase
#19
Noriyuki Nagahara, Shin Koike, Takashi Nirasawa, Hideo Kimura, Yuki Ogasawara
It has been known that hydrogen sulfide and/or polysulfides are produced from a (poly)sulfurated sulfur-acceptor substrate of 3-mercaptopyruvate sulfurtransferase (MST) via thioredoxin (Trx) reduction in vitro. In this study, we used thiosulfate as the donor substrate and the catalytic reaction was terminated on the formation of a persulfide or polysulfides. We can present alternative pathway of production of hydrogen sulfide and/or polysulfides from (poly)sulfurated catalytic-site cysteine of reaction intermediates of MST via Trx reduction...
January 10, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29331369/equisetum-telmateia-extracts-chemical-compositions-antioxidant-activity-and-antimicrobial-effect-on-the-growth-of-some-pathogenic-strain-causing-poisoning-and-infection
#20
Marzie Yeganegi, Farideh Tabatabaei Yazdi, Seyed Ali Mortazavi, Javad Asili, Behrooz Alizadeh Behbahani, Adel Beig Babaei
The aerial parts of Equisetum telmateia have been used as a source of biologically active compounds to treat inflammatory, diarrhea, stomach-ache, eczema and mouth infections in traditional medicine. The aim of this work is to evaluate the extraction yield, chemical compositions, antioxidant activity and antimicrobial activity of E. telmateia extracts on Staphylococcus aureus, Bacillus cereus, Escherichia coli, Salmonella typhi and Candida albicans. Chemical compositions E. telmateia was analyzed by high performance liquid chromatography (HPLC) using a C18 column...
January 10, 2018: Microbial Pathogenesis
keyword
keyword
117822
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"