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https://www.readbyqxmd.com/read/28548841/light-absorption-by-brown-carbon-in-the-southeastern-united-states-is-ph-dependent
#1
Sabrina M Phillips, Aleia D Bellcross, Geoffrey D Smith
Light-absorbing organic material, or "brown carbon" (BrC), can significantly influence the effect that aerosols have on climate. Here, we investigate how changing pH affects the absorption spectra of water-soluble BrC from ambient particulate matter smaller than 2.5 μm collected in Athens, Georgia, in the spring and fall of 2016, including samples from nearby wildfires. We find that absorption increases 10% per pH unit from pH 2 to pH 12 with a broad, featureless tail at visible wavelengths, where the largest fractional increase is also observed...
May 26, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28548140/photobleaching-of-chromophoric-dissolved-organic-matter-cdom-in-the-yangtze-river-estuary-kinetics-and-effects-of-temperature-ph-and-salinity
#2
Guisheng Song, Yijie Li, Suzheng Hu, Guiju Li, Ruihua Zhao, Xin Sun, Huixiang Xie
The kinetics and temperature-, pH- and salinity-dependences of photobleaching of chromophoric dissolved organic matter (CDOM) in the Yangtze River estuary (YRE) were evaluated using laboratory solar-simulated irradiation and compared to those of Suwannee River humic substances (SRHSs). Nearly all CDOM in water at the head of the estuary (headwater herein) was photobleachable in both summer and winter, while significant fractions of CDOM (13-29%) were resistant to photobleaching in saltier waters. The photobleaching rate constant in the headwater was 25% higher in summer than that in winter...
May 26, 2017: Environmental Science. Processes & Impacts
https://www.readbyqxmd.com/read/28546583/hybridizing-feature-selection-and-feature-learning-approaches-in-qsar-modeling-for-drug-discovery
#3
Ignacio Ponzoni, Víctor Sebastián-Pérez, Carlos Requena-Triguero, Carlos Roca, María J Martínez, Fiorella Cravero, Mónica F Díaz, Juan A Páez, Ramón Gómez Arrayás, Javier Adrio, Nuria E Campillo
Quantitative structure-activity relationship modeling using machine learning techniques constitutes a complex computational problem, where the identification of the most informative molecular descriptors for predicting a specific target property plays a critical role. Two main general approaches can be used for this modeling procedure: feature selection and feature learning. In this paper, a performance comparative study of two state-of-art methods related to these two approaches is carried out. In particular, regression and classification models for three different issues are inferred using both methods under different experimental scenarios: two drug-like properties, such as blood-brain-barrier and human intestinal absorption, and enantiomeric excess, as a measurement of purity used for chiral substances...
May 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28544958/impact-of-triblock-copolymers-on-the-biophysical-function-of-naturally-derived-lung-surfactant
#4
Moritz Beck-Broichsitter, Christian A Ruge, Adam Bohr
The current study aimed at investigating the general applicability of triblock copolymers consisting of poly(ethylene glycol) and poly(propylene glycol) (Pluronic(®)) as excipients for lung delivery. After thorough physicochemical characterization of the diverse polymers, their cytotoxicity was evaluated using alveolar epithelial cells. Next, a naturally-derived lung surfactant was challenged with the distinct triblock copolymers with respect to changes in microstructure, adsorption to the air/liquid interface and dynamic surface tension behavior under bubble pulsation...
May 17, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28544560/fatal-intoxication-by-5f-adb-and-diphenidine-detection-quantification-and-investigation-of-their-main-metabolic-pathways-in-human-by-lc-ms-ms-and-lc-q-tofms
#5
Maiko Kusano, Kei Zaitsua, Kentaro Taki, Kazuaki Hisatsune, Jun'ichi Nakajima, Takako Moriyasu, Tomomi Asano, Yumi Hayashi, Hitoshi Tsuchihashi, Akira Ishii
Despite the implementation of the new blanket scheduling system in 2013, new psychoactive substance (NPS) abuse remains a serious social concern in Japan. We present a fatal intoxication case involving 5F-ADB (methyl 2-[1-(5-fluoropentyl)-1H-indazole-3-carboxamido]-3,3-dimethylbutanoate) and diphenidine. Postmortem blood screening by liquid chromatography/quadrupole time-of-flight mass spectrometry (LC/Q-TOFMS) in the information dependent acquisition (IDA) mode only detected diphenidine. Further urinary screening using an in-house database containing new NPS and metabolites detected not only diphenidine but also possible 5F-ADB metabolites; subsequent targeted screening by LC/tandem mass spectrometry (LC/MS/MS) allowed for the detection of very low level of unchanged 5F-ADB in postmortem heart blood...
May 21, 2017: Drug Testing and Analysis
https://www.readbyqxmd.com/read/28540538/impact-of-a-community-based-frailty-intervention-among-middle-aged-and-older-prefrail-and-frail-homeless-women-a-pilot-randomized-controlled-trial
#6
Benissa E Salem, Jennifer Ma-Pham, Stephanie Chen, Mary-Lynn Brecht, Anna Liza Antonio, Masha Ames
Interventions are needed to address frailty and other behaviors (e.g., drug and alcohol use) among prefrail and frail homeless women (P/FHW). The purpose of this pilot randomized controlled trial (RCT) was to compare the efficacy of a Frailty Intervention (FI) versus a Health Promotion (HP) program among P/FHW (N = 32). Structured instruments assessed sociodemographics, individual, situational, health-related, and behavioral factors. While program differences were not statistically significant with the main outcome variables, medium-to-large effect sizes were found in favor of the HP program as it relates to physical and overall frailty, as well as, any drug use, alcohol use, and drug dependency...
May 24, 2017: Community Mental Health Journal
https://www.readbyqxmd.com/read/28540510/modelling-the-potential-mobility-of-cd-cu-ni-pb-and-zn-in-mollic-fluvisols
#7
Thilo Rennert, Jörg Rinklebe
European floodplain soils are frequently contaminated with potentially toxic inorganic substances. We used a multi-surface model to estimate the aqueous concentrations of Cd, Cu, Ni, Pb and Zn in three Mollic Fluvisols from the Central Elbe River (Germany). The model considered complexation in solution and interactions with soil organic matter (SOM), a clay mineral and hydrous Al, Fe and Mn oxides. The amounts of reactive metals were derived from extraction with 0.43 M HNO3. Modelling was carried out as a function of pH (soil pH ± 1...
May 24, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28539094/domestic-minor-sex-trafficking-among-child-welfare-involved-youth-an-exploratory-study-of-correlates
#8
Jennifer E O'Brien, Kevin White, Cynthia Fraga Rizo
Our research team used the National Survey of Child and Adolescent Well-Being II to explore relationships between demographic factors, domestic minor sex trafficking (DMST) status, and several psychosocial dependent variables for children and youth in the child welfare system who affirm that they have been paid for sex within the past 6 months. The sample included a total of 814 children and youth, 38 of whom reported DMST victimization. Results revealed that youth with a history of DMST victimization were more likely than their nonexploited peers to report runaway behavior, demonstrate externalizing behaviors, and test in the clinical range for a substance abuse problem...
January 1, 2017: Child Maltreatment
https://www.readbyqxmd.com/read/28535815/internet-based-attentional-bias-modification-training-as-add-on-to-regular-treatment-in-alcohol-and-cannabis-dependent-outpatients-a-study-protocol-of-a-randomized-control-trial
#9
Janika Heitmann, Madelon E van Hemel-Ruiter, Karin M Vermeulen, Brian D Ostafin, Colin MacLeod, Reinout W Wiers, Laura DeFuentes-Merillas, Martine Fledderus, Wiebren Markus, Peter J de Jong
BACKGROUND: The automatic tendency to attend to and focus on substance-related cues in the environment (attentional bias), has been found to contribute to the persistence of addiction. Attentional bias modification (ABM) interventions might, therefore, contribute to treatment outcome and the reduction of relapse rates. Based on some promising research findings, we designed a study to test the clinical relevance of ABM as an add-on component of regular intervention for alcohol and cannabis patients...
May 23, 2017: BMC Psychiatry
https://www.readbyqxmd.com/read/28535462/pharmaceutical-substances-in-ambient-particulates-a-preliminary-assessment
#10
Angelo Cecinato, Paola Romagnoli, Mattia Perilli, Catia Balducci
Till now, no attention has been paid to pharmaceuticals (PCs) in the air, though they are known to affect waters, soils, foods and biota. This paper describes the first attempt to characterize the PC occurrence in the air. Airborne particulates (PM10 or PM2.5 fractions, from Amsterdam, Netherland, Rome and Rende, Italy) were sampled on quartz fiber filter by means of pumping systems operating at medium-volume conditions (16 or 38.5 L min(-1)). The samples were solvent extracted through sonication with a dichloromethane:acetone:methanol mixture and reduced close to dryness; three fractions of the residue were separated through column chromatography; they comprised non polar, low polar and very polar organic compounds, respectively, and PCs were in the third one...
May 18, 2017: Chemosphere
https://www.readbyqxmd.com/read/28534495/exercise-induces-cerebral-vegf-and-angiogenesis-via-the-lactate-receptor-hcar1
#11
Cecilie Morland, Krister A Andersson, Øyvind P Haugen, Alena Hadzic, Liv Kleppa, Andreas Gille, Johanne E Rinholm, Vuk Palibrk, Elisabeth H Diget, Lauritz H Kennedy, Tomas Stølen, Eivind Hennestad, Olve Moldestad, Yiqing Cai, Maja Puchades, Stefan Offermanns, Koen Vervaeke, Magnar Bjørås, Ulrik Wisløff, Jon Storm-Mathisen, Linda H Bergersen
Physical exercise can improve brain function and delay neurodegeneration; however, the initial signal from muscle to brain is unknown. Here we show that the lactate receptor (HCAR1) is highly enriched in pial fibroblast-like cells that line the vessels supplying blood to the brain, and in pericyte-like cells along intracerebral microvessels. Activation of HCAR1 enhances cerebral vascular endothelial growth factor A (VEGFA) and cerebral angiogenesis. High-intensity interval exercise (5 days weekly for 7 weeks), as well as L-lactate subcutaneous injection that leads to an increase in blood lactate levels similar to exercise, increases brain VEGFA protein and capillary density in wild-type mice, but not in knockout mice lacking HCAR1...
May 23, 2017: Nature Communications
https://www.readbyqxmd.com/read/28534313/class-based-chronicities-of-suffering-and-seeking-help-comparing-addiction-treatment-programs-in-uganda
#12
Julia Vorhölter
Based on ethnographic fieldwork, this article looks at changing discourses and practices in the field of mental health care in Uganda. In particular, it analyzes two psychotherapeutic institutions designed to treat drug- and alcohol-addiction, and their accessibility and affordability for people from different class backgrounds. The first center is a high-class residential facility near Kampala which offers state-of-the-art addiction therapy, but is affordable only for the rich. The second center, a church-funded organization in Northern Uganda, cares mainly for people from poor, rural families who cannot afford exp/tensive treatment...
May 22, 2017: Culture, Medicine and Psychiatry
https://www.readbyqxmd.com/read/28534298/formulation-and-in-vitro-characterization-of-bioactive-mesoporous-silica-with-doxorubicin-and-metronidazole-intended-for-bone-treatment-and-regeneration
#13
Katarzyna Czarnobaj, Magdalena Prokopowicz, Wiesław Sawicki
The purpose of this study was to evaluate the surface mineralization activity and in vitro drug behavior potential of two forms of mesoporous silica: powder and granulate. Ordered mesoporous SiO2 powder was synthesized by surfactant-assisted sol-gel process using tetraethoxysilane as a silica precursor and hexadecyltrimethylammonium bromide as the structure-directing agent. The granulate was prepared using silica powder and ethyl cellulose as a binding agent. Metronidazole (MT)-an anti-inflammatory substance and doxorubicin hydrochloride (ChD)-an anti-cancer drug were chosen as drug models for delivery studies...
May 22, 2017: AAPS PharmSciTech
https://www.readbyqxmd.com/read/28534173/successful-treatment-of-patients-with-newly-diagnosed-untreated-light-chain-multiple-myeloma-with-a-combination-of-bendamustine-prednisone-and-bortezomib-bpv
#14
Hannah Tessenow, Madlen Holzvogt, Bruno Holzvogt, Marc Andrea, Simone Heyn, Thomas Schliwa, Maik Schwarz, Thomas Zehrfeld, Cornelia Becker, Christian Pfrepper, Georg Nikolaus Franke, Rainer Krahl, Madlen Jentzsch, Sabine Leiblein, Sebastian Schwind, Marius Bill, Vladan Vucinic, Thoralf Lange, Dietger Niederwieser, Wolfram Pönisch
INTRODUCTION: Patients with light chain myeloma frequently have a light chain tubular cast nephropathy, which can lead to severe renal impairment. In the present retrospective study, bortezomib was combined with other active substances like bendamustine and prednisone (BPV), in order to assess the efficacy and toxicity of the combination therapy in patients with light chain multiple myeloma. METHODS: Between September 2008 and May 2015, 25 patients with newly diagnosed light chain multiple myeloma were treated with bendamustine 60 mg/m(2) on days 1 and 2, bortezomib 1...
May 22, 2017: Journal of Cancer Research and Clinical Oncology
https://www.readbyqxmd.com/read/28533917/management-of-esophageal-caustic-injury
#15
EDITORIAL
Mark Anthony A De Lusong, Aeden Bernice G Timbol, Danny Joseph S Tuazon
Ingestion of caustic substances and its long-term effect on the gastrointestinal system maintain its place as an important public health issue in spite of the multiple efforts to educate the public and contain its growing number. This is due to the ready availability of caustic agents and the loose regulatory control on its production. Substances with extremes of pH are very corrosive and can create severe injury in the upper gastrointestinal tract. The severity of injury depends on several aspects: Concentration of the substance, amount ingested, length of time of tissue contact, and pH of the agent...
May 6, 2017: World Journal of Gastrointestinal Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28533147/diversities-of-behavioral-traits-and-neuropsychological-function-in-different-substance-addiction
#16
Hui-Yi Wang, Tzong-Shi Wang, Yi-Chyan Chen
OBJECTIVE: There are various temperaments and personality characters that modulate the development of substance addiction. The pharmacological properties of substances would alter the homeostasis of brain function and influence the neuropsychological performance through different neurotransmissions which then facilitate diverse emotional and behavioral responses. Our goal is to assess the interaction between personality characteristics, neuropsychological performances and Stroop interference in alcoholics, heroin and amphetamine dependent persons...
May 19, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/28533019/the-in-vitro-effect-of-nonylphenol-propranolol-and-diethylstilbestrol-on-quality-parameters-and-oxidative-stress-in-sterlet-acipenser-ruthenus-spermatozoa
#17
Olena Shaliutina, Ievgeniia Gazo, Anna Shaliutina-Kolešová, Ievgen Lebeda, Marek Rodina
The sturgeon is a highly endangered fish mostly due to over-fishing, habitat destruction, and water pollution. Nonylphenol (NP), propranolol (PN), and diethylstilbestrol (DES) are multifunctional xenobiotic compounds used in a variety of commercial and industrial products. The mechanism by which these xenobiotic compounds interfere with fish reproduction is not fully elucidated. This study assessed the effect of NP, PN, and DES on motility parameters, membrane integrity, and oxidative/antioxidant status in sterlet Acispenser ruthenus spermatozoa...
May 19, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28531769/increases-in-prescription-opioid-injection-abuse-among-treatment-admissions-in-the-united-states-2004-2013
#18
Christopher M Jones, Aleta Christensen, R Matthew Gladden
BACKGROUND: The 2015 HIV outbreak in Indiana associated with prescription opioid injection coupled with rising rates of hepatitis C, especially in areas with long-standing opioid abuse, have raised concerns about prescription opioid injection. However, research on this topic is limited. We assessed trends in treatment admissions reporting injection, smoking, and inhalation abuse of prescription opioids and examined characteristics associated with non-oral routes of prescription opioid abuse in the U...
May 16, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28531764/disrupted-resting-brain-graph-measures-in-individuals-at-high-risk-for-alcoholism
#19
Bharath Holla, Rajanikant Panda, Ganesan Venkatasubramanian, Bharat Biswal, Rose Dawn Bharath, Vivek Benegal
Familial susceptibility to alcoholism is likely to be linked to the externalizing diathesis seen in high-risk offspring from high-density alcohol use disorder (AUD) families. The present study aimed at comparing resting brain functional connectivity and their association with externalizing symptoms and alcoholism familial density in 40 substance-naive high-risk (HR) male offspring from high-density AUD families and 30 matched healthy low-risk (LR) males without a family history of substance dependence using graph theory-based network analysis...
May 14, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28531762/high-dose-testosterone-enanthate-supplementation-boosts-oxidative-stress-but-exerts-little-effect-on-the-antioxidant-barrier-in-sedentary-adolescent-male-rat-liver
#20
Ewa Sadowska-Krepaa, Barbara Klapcinępa, Barbara Kłapcińska, Sławomir Jagsz, Anna Nowara, Izabela Szołtysek-Bołdys, Małgorzata Chalimoniuk, Józef Langfort, Stanisław J Chrapusta
BACKGROUND: Anabolic-androgenic steroids abuse is on the rise among adolescent boys and young men, mostly in those seeking a 'shortcut' to an improved body image. This approach is associated with the risk of severe adverse health effects, some of which involve the liver and are linked to hepatic oxidative stress. Testosterone and its esters is a cornerstone of most anabolic-androgenic steroid stacking protocols. METHODS: We assessed and compared several hepatotoxicity and liver oxidative stress indices, as well as the contents of some components of the hepatic antioxidant barrier between sedentary adolescent male rats given a 6-week course of weekly im testosterone enanthate (TE, 8 or 80mg/kgBW/week) or vehicle (sesame oil) injections...
March 11, 2017: Pharmacological Reports: PR
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