Read by QxMD icon Read


Shaukat Ali M Shaikh, Atanu Barik, Beena G Singh, Ramani V Madukuri, Neduri V Balaji, Gottumukkal V Subbaraju, Devidas B Naik, K Indira Priyadarsini
Hispolon (HS), a natural polyphenol found in medicinal mushrooms, and its isoxazole (HI) and pyrazole (HP) derivatives have been examined for free radical reactions and in vitro antioxidant activity. Reaction of these compounds with one-electron oxidant, azide radicals (N3(•)) and trichloromethyl peroxyl radicals (CCl3O2(•)), model peroxyl radicals, studied by nanosecond pulse radiolysis technique, indicated formation of phenoxyl radicals absorbing at 420 nm with half life of few hundred microseconds (µs)...
October 13, 2016: Free Radical Research
Adam Michael Scheer, Arkke J Eskola, David L Osborn, Leonid Sheps, Craig Allen Taatjes
The pulsed photolytic chlorine-initiated oxidation of diethyl ketone [DEK; (CH3CH2)2C=O], 2,2,4,4-d4-DEK [d4-DEK; (CH3CD2)2C=O] and 1,1,1,5,5,5-d6-DEK [d6-DEK; (CD3CH2)2C=O] is studied at 8 Torr and 1 - 2 atm and from 400 - 625 K. Cl atoms produced by laser photolysis react with diethyl ketone to form either primary (3-pentan-on-1-yl, RP) or secondary (3-pentan-on-2-yl, RS¬¬) radicals, which in turn react with O2. Multiplexed time of flight mass spectrometry, coupled to either a hydrogen discharge lamp or tunable synchrotron photoionizing radiation, is used to detect products as a function of mass, time and photon energy...
October 11, 2016: Journal of Physical Chemistry. A
Jin-Won Noh, Kyoung-Beom Kim, Hyunchun Park, Young Dae Kwon
BACKGROUND: This study aims to set itself apart from prior research by elucidating gender differences in outpatient service utilization among adults aged 20 years or older, using nationally representative survey data. METHODS: Data from the Korea Health Panel (KHP) collected between 2010 and 2011 were used. In this study, all KHP participants who accessed outpatient service between 2010 and 2011 were included; 13,525 participants used outpatient services in 2010 and 12,991 in 2011...
October 5, 2016: Journal of Women's Health
Yong Zhang, Peng Zhao, Jie Li, Deyin Hou, Jun Wang, Huijuan Liu
A novel catalytic ozonation membrane reactor (COMR) coupling homogeneous catalytic ozonation and direct contact membrane distillation (DCMD) was developed for refractory saline organic pollutant treatment from wastewater. An ozonation process took place in the reactor to degrade organic pollutants, whilst the DCMD process was used to recover ionic catalysts and produce clean water. It was found that 98.6% total organic carbon (TOC) and almost 100% salt were removed and almost 100% metal ion catalyst was recovered...
October 2016: Chemosphere
Sojung Park, BoRin Kim, Soojung Kim
This study examined relationships between socioeconomic disadvantage and unmet health care needs among older adults in Korea adjusting for predisposing and health need factors. We examined how older adults' low-income status and working status affect unmet needs for healthcare over time, and how the association varies by reason for unmet needs (i.e. financial or non-financial). We used three waves of data (2009, 2011, 2012) from the Korea Health Panel (KHP) survey and a multinomial logistic mixed model to analyze how low socioeconomic disadvantages affects changes in unmet healthcare needs independently and in combination...
June 2016: Health Policy
Jeong-Eun Lee, Hyung-Ik Shin, Young Kyung Do, Eun Joo Yang
Persons with disabilities use more health care services due to ill health and face higher health care expenses and burden. This study explored the incidence of catastrophic health expenditures of households with persons with disabilities compared to that of those without such persons. We used the Korean Health Panel (KHP) dataset for the years 2010 and 2011. The final sample was 5,610 households; 800 (14.3%) of these were households with a person with a disability and 4,810 (85.7%) were households without such a person...
March 2016: Journal of Korean Medical Science
Dennis Ausiello, Scott Lipnick
The next frontier in medicine involves better quantifying human traits, known as "phenotypes." Biological markers have been directly associated with disease risks, but poor measurement of behaviors such as diet and exercise limits our understanding of preventive measures. By joining together an uncommonly wide range of disciplines and expertise, the Kavli HUMAN Project will advance measurement of behavioral phenotypes, as well as environmental factors that impact behavior. By following the same individuals over time, KHP will liberate new understanding of dynamic links between behavioral phenotypes, disease, and the broader environment...
September 1, 2015: Big Data
Laura Bierut, David Cesarini
Despite clear links between genes and smoking, effective public policy requires far richer measurement of the feedback between biological, behavioral, and environmental factors. The Kavli HUMAN Project (KHP) plans to exploit the plummeting costs of data gathering and to make creative use of new technologies to construct a longitudinal panel data set that would compare favorably to existing longitudinal surveys, both in terms of the richness of the behavioral measures and the cost-effectiveness of the data collection...
September 1, 2015: Big Data
Adam Drewnowski, Ichiro Kawachi
Health is shaped by both personal choices and features of the food environment. Food-choice decisions depend on complex interactions between biology and behavior, and are further modulated by the built environment and community structure. That lower-income families have lower-quality diets is well established. Yet, diet quality also varies across small geographic neighborhoods and can be influenced by transportation, retail, and ease of access to healthy foods, as well as by attitudes, beliefs, and social interactions...
September 1, 2015: Big Data
Kenneth M Langa, David Cutler
The Kavli HUMAN Project (KHP) will provide groundbreaking insights into how biological, medical, and social factors interact and impact the risks for cognitive decline from birth through older age. It will richly measure the effect of cognitive decline on the ability to perform key activities of daily living. In addition, due to its family focus, the KHP will measure the impact on family members, including the amount of time that family members spend providing care to older adults with dementia. It will also clarify the division of caregiving duties among family members and the effects on caregivers' work, family life, and balance thereof...
September 1, 2015: Big Data
Okan Azmak, Hannah Bayer, Andrew Caplin, Miyoung Chun, Paul Glimcher, Steven Koonin, Aristides Patrinos
Until now, most large-scale studies of humans have either focused on very specific domains of inquiry or have relied on between-subjects approaches. While these previous studies have been invaluable for revealing important biological factors in cardiac health or social factors in retirement choices, no single repository contains anything like a complete record of the health, education, genetics, environmental, and lifestyle profiles of a large group of individuals at the within-subject level. This seems critical today because emerging evidence about the dynamic interplay between biology, behavior, and the environment point to a pressing need for just the kind of large-scale, long-term synoptic dataset that does not yet exist at the within-subject level...
September 1, 2015: Big Data
Yin-Huan Li, C Phillip Shelor, Purnendu K Dasgupta
We present an absorption spectrometric method using a polytetrafluoroethylene (PTFE) cell as a diffuse reflector. The system was used for monitoring ultrapure water. All compounds absorb to some degree at low UV wavelengths, and the absorption at 214 nm from a zinc lamp source was monitored using a charge-coupled device (CCD) spectrometer. The absorption was interpreted in terms of total organic carbon present. The cell acts as a nonlinear absorbance amplifier, improving both the limit of detection (LOD) and the dynamic range...
January 20, 2015: Analytical Chemistry
Patricia Carbajal-Palacios, Patricia Balderas-Hernandez, Jorge G Ibanez, Gabriela Roa-Morales
The usefulness of the standard chemical oxygen demand (COD) test for water characterization is offset to some extent by its requirement for highly toxic or expensive Cr, Ag, and Hg species. In addition, oxidation of the target samples by chromate requires a 2-3 h heating step. We have downscaled this method to obtain a reduction of up to ca. 80% in the use and generation of toxic residues and a time reduction of up to ca. 67%. This also translates into considerable energy savings by reducing the time required for heating as well as costly labour time...
May 2014: Environmental Technology
S R Thilagavathy, P Rajesh, P Ramasamy, K Ambujam
Single crystals of Potassium Hydrogen Phthalate doped with amino acid l-lysine were grown successfully by slow evaporation method. The concentration of dopant in the mother solution was 0.5mol%, 1mol% and 2mol%. There is a drastic change in the morphology due to variation in doping rates which is also reflected in the X-ray diffraction data. The Fourier Transform infrared spectroscopy study confirms the incorporation of l-lysine into Potassium Hydrogen Phthalate crystal. The thermal study indicates the dissociating nature of the crystal...
June 5, 2014: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
Xianrui Liang, Liping Du, Feng Su, Harendra S Parekh, Weike Su
Spectroscopic tools such as NMR can be applied to the quantitative analysis of active pharmaceutical ingredients with relative ease and accuracy. Here, we demonstrate the quantification of clindamycin phosphate (CLP) in a conventional tablet formulation, performed using potassium hydrogen phthalate (KHP) as the internal standard and deuterium oxide (D2O) as the NMR solvent. The methyl protons signal of CLP at 0.72 ppm (triplet) relative to the signal of KHP at 7.37-7.40 ppm (multiplet) was used for quantification purposes using (1)H NMR...
April 2014: Magnetic Resonance in Chemistry: MRC
Amrit Jalan, Ionut M Alecu, Rubén Meana-Pañeda, Jorge Aguilera-Iparraguirre, Ke R Yang, Shamel S Merchant, Donald G Truhlar, William H Green
We present new reaction pathways relevant to low-temperature oxidation in gaseous and condensed phases. The new pathways originate from γ-ketohydroperoxides (KHP), which are well-known products in low-temperature oxidation and are assumed to react only via homolytic O-O dissociation in existing kinetic models. Our ab initio calculations identify new exothermic reactions of KHP forming a cyclic peroxide isomer, which decomposes via novel concerted reactions into carbonyl and carboxylic acid products. Geometries and frequencies of all stationary points are obtained using the M06-2X/MG3S DFT model chemistry, and energies are refined using RCCSD(T)-F12a/cc-pVTZ-F12 single-point calculations...
July 31, 2013: Journal of the American Chemical Society
Joan Noguerol-Arias, Angela Rodríguez-Abalde, Eva Romero-Merino, Xavier Flotats
This paper reports the development of an innovative sample preparation method for the determination of the chemical oxygen demand (COD) in heterogeneous solid or semisolid samples, with high suspended solids and COD concentrations, using an optimized closed reflux colorimetric method. The novel method, named solid dilution (SD), is based on a different technique of sample preparation, diluting the sample with magnesium sulfate (MgSO(4)) previous to COD determination. With this, it is possible to obtain a solid homogeneous mixture much more easily analyzable...
July 3, 2012: Analytical Chemistry
Y S Fung, Z Wu, K L Dao
A sensitive method for determining total organic carbon at microgram per liter levels in industrial, environmental, and drinking waters by thermal combustion ion chromatography was developed using tube furnace and readily accessable HPLC equipment. To achieve complete oxidation, persulfate (0.25%) was added to oxidize nonvolatile organic compounds in solution and cupric oxide heated at 900 °C to convert volatile organic compounds to CO(2), which was scrubbed in a 20 mL solution of 50 mM KOH with 10 drops of butanol added...
July 1, 1996: Analytical Chemistry
Yelena N Tarasenko, Nancy E Schoenberg, Keisa L Bennett
Meeting the health care needs of rural residents is complicated by their substantial medical burdens that frequently outstrip patient and community resources. Nowhere is this more evident than in central Appalachia. Preventive procedures are often sacrificed as patients and providers attend to more pressing medical issues. We report the results of a pilot study designed to explore the need for and appropriateness of a potential intervention placed in an emergency department (ED), with the eventual goal of using the ED to link traditionally underserved patients to preventive services...
April 2011: Journal of Primary Care & Community Health
Carlos Cairós, Jordi Coello, Santiago Maspoch
The diffuse reflectance near-infrared (NIR) spectrum of a powdered sample includes the contribution of specular and diffuse reflectance, which is a function of absorbance and scattering. The fraction of light scattered depends in a complex manner on the physical properties of the sample such as particle size, refraction index, etc. Several theories to study the dependence of NIR spectra on the particle size have been proposed. The best known is the Kubelka-Munk model, an approach based on continuous mathematics...
December 2008: Applied Spectroscopy
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"