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https://www.readbyqxmd.com/read/28732338/toxic-organic-substances-and-marker-compounds-in-size-segregated-urban-particulate-matter-implications-for-involvement-in-the-in%C3%A2-vitro-bioactivity-of-the-extractable-organic-matter
#1
Athanasios Besis, Alexandra Tsolakidou, Dimitra Balla, Constantini Samara, Dimitra Voutsa, Anastasia Pantazaki, Theodora Choli-Papadopoulou, Theodore S Lialiaris
Toxic organic substances and polar organic marker compounds, i.e. polychlorinated biphenyls (PCBs), organochlorine pesticides (OCPs), polybrominated diphenyl ethers (PBDEs), polycyclic aromatic hydrocarbons (PAHs) and their nitro-derivatives (N-PAHs), as well as dicarboxylic acids (DCAs) and sugars/sugar anhydrites (S/SAs) were analyzed in size-segregated PM samples (<0.49, 0.49-0.97, 0.97-3 and >3 μm) collected at two urban sites (urban traffic and urban background) during the cold and the warm season...
July 18, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28732328/spectroscopic-descriptors-for-dynamic-changes-of-soluble-microbial-products-from-activated-sludge-at-different-biomass-growth-phases-under-prolonged-starvation
#2
Tahir Maqbool, Jinwoo Cho, Jin Hur
In this study, the spectroscopic indices of soluble microbial products (SMP) were explored using absorption and fluorescence spectroscopy to identify different distinctive biomass growth phases (i.e., exponential phase, pseudo-endogenous phase, and endogenous phase) and to describe the microbial activity of activated sludge in a batch type bioreactor under prolonged starvation. The optical descriptors, including UV absorption at 254 nm (UVA254), spectral slope, absorbance slope index (ASI), biological index (BIX), humification index (HIX), and the ratio of tryptophan-like to humic-like components (C1/C2), were examined to describe the dynamic changes in SMP...
July 15, 2017: Water Research
https://www.readbyqxmd.com/read/28732319/did-the-dependent-coverage-expansion-increase-risky-substance-use-among-young-adults
#3
Joshua Breslau, Hao Yu, Bing Han, Rosalie L Pacula, Rachel M Burns, Bradley D Stein
BACKGROUND: The dependent coverage expansion (DCE) enacted through the Affordable Care Act increased health insurance coverage among young adults. Increasing insurance coverage in this age group has the potential for unintended consequences on risky substance use. METHODS: Repeated cross-sectional surveys were used to compare change in substance use during the period the DCE was implemented in the 19-25year old target age group (Pre-DCE n=15,772, Post-DCE n=22,719) with contemporaneous change in a slightly older age group that was not targeted by the policy (Pre-DCE=19,851, Post-DCE n=28,157)...
July 14, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28732317/cross-lagged-relations-between-motives-and-substance-use-can-use-strengthen-your-motivation-over-time
#4
Christine A Lee, Karen J Derefinko, Heather A Davis, Richard Milich, Donald R Lynam
Motives for substance use have garnered considerable attention due to the strong predictive utility of this construct, both in terms of use and problems associated with use. The current study examined the cross-lagged relations between alcohol use and motives, and marijuana use and motives over three yearly assessment periods in a large sample (N=526, 48% male) of college students. The relations between substance use and motives were assessed at each time point, allowing for the examination of these inter-relations over time...
June 28, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28732306/photostability-testing-using-online-reactor-hplc-hyphenation-and-mass-spectrometric-compound-identification-illustrated-by-ketoprofen-as-model-compound
#5
Jaber Assaf, Diego Zulkiewicz Gomes, Bernhard Wuest, Maria Kristina Parr
Investigations on the photochemical stability of pharmaceutical substances are mandatory in drug development and licensing as photo-induced degradation of an active pharmaceutical ingredient (API) may not only lead to decreased API concentrations but also to toxic or reactive products. Thus, the US Food and Drug Administration (FDA) and the International Council for Harmonisation of Technical Requirements for Pharmaceuticals for Human Use (ICH) issued Guidance for Industry Q1B "Photostability Testing of New Drug Substances and Products" for testing of pure but also packed drugs...
July 8, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28732298/stomatal-and-non-stomatal-factors-regulated-the-photosynthesis-of-soybean-seedlings-in-the-present-of-exogenous-bisphenol-a
#6
Liya Jiao, Lihong Wang, Qing Zhou, Xiaohua Huang
Bisphenol A (BPA) is an emerging environmental endocrine disruptor that has toxic effects on plants growth. Photosynthesis supplies the substances and energy required for plant growth, and regulated by stomatal and non-stomatal factors. Therefore, in this study, to reveal how BPA affects photosynthesis in soybean seedlings (Glycine max L.) from the perspective of stomatal and non-stomatal factors, the stomatal factors (stomatal conductance and behaviours) and non-stomatal factors (Hill reaction, apparent quantum efficiency, Rubisco activity, carboxylation efficiency, the maximum Rubisco carboxylation velocity, ribulose-1,5-bisphospate regeneration capacities mediated by maximum electron transport rates, and triose phosphate utilization rate) were investigated using a portable photosynthesis system...
July 18, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28732258/areca-catechu-palm-tree-nut-chewing-and-seizures-an-observational-study
#7
Farrah J Mateen, Marco Carone, Lhab Tshering, Chencho Dorji, Ugyen Dema, Sara J Grundy, Dili Ram Pokhrel, Damber K Nirola
OBJECTIVE: The objective of this study was to report the impact of chronic abuse of Areca catechu nut wrapped in leaf (also known as doma, quid, paan), the fourth most commonly abused psychoactive substance worldwide, on the frequency of seizures among people with epilepsy. METHODS: People with clinically diagnosed epilepsy (>14years old) residing in the Kingdom of Bhutan were surveyed for self-reported Areca catechu use, demographic variables, epilepsy characteristics, and seizure frequency...
July 18, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28732221/atrophic-mandible-fractures-are-bone-grafts-necessary-an-update
#8
Jaime Castro-Núñez, Larry L Cunningham, Joseph E Van Sickels
PURPOSE: The management of atrophic mandibular fractures poses a challenge because of anatomic variations and medical comorbidities associated with elderly patients. The purpose of this article is to review and update the literature regarding the management of atrophic mandible fractures using load-bearing reconstruction plates placed without bone grafts. MATERIALS AND METHODS: We performed a review of the English-language literature looking for atrophic mandibular fractures with or without continuity defects and reconstruction without bone grafts...
June 24, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28732185/chronotype-sleep-characteristics-and-musculoskeletal-disorders-among-hospital-nurses
#9
Yuan Zhang, Jeanne F Duffy, Elizabeth Ronan de Castillero, Kefang Wang
Work-related musculoskeletal disorders (WMSDs) persist as the leading occupational injury, accounting for nearly half of nurses' total occupational injuries. Musculoskeletal pain is a known cause of sleep disruption, and individuals with WMSDs that interfere with sleep often report more pain. Evening chronotype has been associated with poor sleep among nurses. However, the associations among chronotype, sleep, and WMSDs are still unclear, and were explored in the present study. A cross-sectional survey was administered to 397 nurses, with 47...
July 1, 2017: Workplace Health & Safety
https://www.readbyqxmd.com/read/28732069/saccharomyces-boulardii-cncm-i-745-supplementation-reduces-gastrointestinal-dysfunction-in-an-animal-model-of-ibs
#10
Paola Brun, Melania Scarpa, Chiara Marchiori, Gloria Sarasin, Valentina Caputi, Andrea Porzionato, Maria Cecilia Giron, Giorgio Palù, Ignazio Castagliuolo
BACKGROUND: We evaluated the effect of Saccharomyces boulardii CNCM I-745 on intestinal neuromuscular anomalies in an IBS-type mouse model of gastrointestinal motor dysfunctions elicited by Herpes Simplex Virus type 1 (HSV-1) exposure. METHODS: Mice were inoculated intranasally with HSV-1 (102 PFU) or vehicle at time 0 and 4 weeks later by the intragastric (IG) route (108 PFU). Six weeks after IG inoculum, mice were randomly allocated to receive oral gavage with either S...
2017: PloS One
https://www.readbyqxmd.com/read/28731926/history-of-anaesthesia-the-ketamine-story-past-present-and-future
#11
Georges Mion
: Ketamine's history begins in the 1950s in Detroit, Michigan, at Parke-Davis Laboratories. On 26 March 1956, Harold V. Maddox synthesised phencyclidine or PCP. Domino studied PCP effects in animals and in 1958, Greifenstein made the first trials of PCP in humans under the name of Sernyl. Sernyl did not cause depression of cardiovascular and respiratory functions, but elicited severe excitation with a very prolonged postoperative recovery. Because of its psychedelic effects, it became a street drug under the name of 'angel dust' and was placed on schedule II of Federal Controlled Substance Act (CSA) in 1978...
July 20, 2017: European Journal of Anaesthesiology
https://www.readbyqxmd.com/read/28731863/screening-adolescents-for-alcohol-use-tracking-practice-trends-of-massachusetts-pediatricians
#12
Sharon Levy, Rosemary E Ziemnik, Sion K Harris, Lily Rabinow, Louise Breen, Christina Fluet, Heather Strother, John H Straus
OBJECTIVES: Substance use screening is a recommended component of routine healthcare for adolescents. A 2008 survey of Massachusetts primary care physicians found high rates of screening, but low rates of validated tool use, leading to the concern that physicians may be missing substance use-related problems and disorders. In an effort to improve practice, a cross-disciplinary group developed and distributed an adolescent screening, brief intervention, and referral to treatment toolkit in 2009...
July 20, 2017: Journal of Addiction Medicine
https://www.readbyqxmd.com/read/28731365/chemical-composition-and-antimigraine-activity-of-essential-oil-of-angelicae-dahuricae-radix
#13
Jingbo Sun, He Li, Jinghui Sun, Huimin Liu, Jianguang Chen, Chunmei Wang
The aim of this study was to explore the chemical composition and the effect of essential oil of Angelicae dahuricae radix on a nitroglycerin (NTG)-induced rat model of migraine. The CO2 supercritical fluid extraction method was optimized for the extraction of essential oil of A. dahuricae radix (EOAD) and its chemical composition was determined. The migraine model was established by subcutaneous injection of NTG (10 mg/kg) 1 h after the last administration of EOAD. The therapeutic effect of EOAD and its underlying mechanism were assessed by monitoring behavioral changes, levels of nitric oxide (NO) in serum and brain tissues, plasma levels of calcitonin gene-related peptide (CGRP) and endothelin (ET), and ET/NO ratio...
July 21, 2017: Journal of Medicinal Food
https://www.readbyqxmd.com/read/28731300/solid-state-structures-of-lead-complexes-with-relevance-for-biological-systems
#14
Katsuyuki Aoki, Kazutaka Murayama, Ning-Hai Hu
Structural information on the interaction between lead ion and its targeting biological substances is important not only for enriching coordination chemistry of lead but for successfully treating lead poisoning that is a present-day problem. This chapter provides structural data, mainly metal binding sites/modes, observed in crystal structures of lead complexes with biorelevant molecules, obtained from the Cambridge Structural Database (the CSD version 5.36 updated to May 2015) and the Protein Data Bank (PDB updated to February 2016)...
April 10, 2017: Metal Ions in Life Sciences
https://www.readbyqxmd.com/read/28731175/heat-shock-induced-hikeshi-protects-cell-viability-via-nuclear-translocation-of-heat-shock-protein-70
#15
Toru Yanoma, Kyoichi Ogata, Takehiko Yokobori, Munenori Ide, Erito Mochiki, Yoshitaka Toyomasu, Mitsuhiro Yanai, Norimichi Kogure, Akiharu Kimura, Masaki Suzuki, Nobuhiro Nakazawa, Tuya Bai, Tetsunari Oyama, Takayuki Asao, Ken Shirabe, Hiroyuki Kuwano
Heat shock proteins (HSPs), particularly HSP70, help restore normal cellular function following damage caused by stressors. HSP expression in tumor tissues indicates cancer progression, and while the development of HSP inhibitors is progressing, these substances are not widely used to treat cancer. HIKESHI (C11orf73) does not control the intracellular movement of HSP70 at normal temperatures; however, it does regulate the function and movements of HSP70 during heat shock. In this study, we examined the intracellular movement of HSP70 during heat shock to investigate the significance of HIKESHI expression in gastric cancer (GC) and determine if HIKESHI inhibition has cytotoxic effects...
July 21, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28730718/impact-of-binding-mechanism-on-selective-inhibition-of-histone-deacetylase-isoforms
#16
Christian Meyners, Franz-Josef Meyer-Almes
Industrialized drug screening campaigns usually deliver hundreds of compounds that are active on a particular pharmaceutical target. In light of high failure rates of drug candidates due to unforeseeable off-target toxicity, the early identification of the most promising compounds with high potential for target selectivity is an urgent need to improve the quality of lead compounds and lower attrition rates in the drug development process. The reliable prediction of the selectivity of active substances for a target protein is a challenging task...
June 14, 2017: Chemical Biology & Drug Design
https://www.readbyqxmd.com/read/28730529/role-of-the-golgi-apparatus-in-the-blood-brain-barrier-golgi-protection-may-be-a-targeted-therapy-for-neurological-diseases
#17
REVIEW
Shuwen Deng, Hui Liu, Ke Qiu, Hong You, Qiang Lei, Wei Lu
The blood-brain barrier (BBB) protects the brain from toxic material in the blood, provides nutrients for brain tissues, and screens harmful substances from the brain. The specific brain microvascular endothelial cells (BMVECs), tight junction between endothelial cells, and astrocytes ensure proper function of the central nervous system (CNS). Pathological factors disrupt the integrity of the BBB by destroying the normal function of endothelial cells and decreasing the production of tight junction proteins or the expression of proteins specifically localized on astrocytes...
July 20, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28730389/cardiovascular-effects-of-high-molecular-weight-compounds-of-humic-nature
#18
M V Zykova, M V Belousov, T V Lasukova, A S Gorbunov, L A Logvinova, A M Dygai
The active ingredient extracted from the peat humic substances was characterized by physicochemical parameters evaluated by UV- and IR-spectroscopy, titration, and elemental (C, H, N) analysis. The cardiovascular effects of this ingredient were examined on isolated Langendorff-perfused rat heart. It was found that the active substance in a concentration range of 0.01-0.1 mg/ml produced a vasodilating effect; in addition, it decreased the end-diastolic and left-ventricular developed pressures.
July 18, 2017: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28730360/characterization-of-extracellular-polymeric-substance-eps-fractions-produced-by-microcystis-aeruginosa-under-the-stress-of-linoleic-acid-sustained-release-microspheres
#19
Lixiao Ni, Danye Li, Shiyi Rong, Lili Su, Wei Zhou, Peifang Wang, Chao Wang, Shiyin Li, Kumud Acharya
This paper focuses on the characterization of extracellular polymeric substances (EPS), which are composed of soluble EPS (SL-EPS), loosely bound EPS (LB-EPS), and tightly bound EPS (TB-EPS) produced by Microcystis aeruginosa under the stress of linoleic acid (LA) and LA sustained-release microspheres. Three-dimensional excitation-emission matrix (3D-EEM) fluorescence spectroscopy and Fourier transform infrared (FTIR) spectrometry were used to characterize three forms of EPS while the content of polysaccharide and protein was tested, respectively...
July 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28730295/incarceration-of-the-medial-collateral-ligament-in-the-intercondylar-notch-following-proximal-avulsion
#20
Edward Walton, Martin Williams, James R Robinson
Intra-articular entrapment of the medial collateral ligament (MCL) is a rare but recognised complication of traumatic injury to the posteromedial corner (PMC) of the knee. Considering the MCL is the most commonly injured ligament of the knee this complication is extremely rare with only a handful of cases describing MCL entrapment following distal avulsion of the MCL. We present the first known case of MCL entrapment following proximal avulsion of the MCL and posterior oblique ligament (POL) with the mid-substance of the MCL becoming entrapped in the joint, lying on the superior surface of the medial meniscus and extending up into the intercondylar notch...
July 20, 2017: Skeletal Radiology
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