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https://www.readbyqxmd.com/read/27936351/metal-exposures-at-three-u-s-electronic-scrap-recycling-facilities
#1
Diana Ceballos, Catherine Beaucham, Elena Page
Many metals found in electronic scrap are known to cause serious health effects, including but not limited to cancer and respiratory, neurologic, renal, and reproductive damage. The National Institute for Occupational Safety and Health/Centers for Disease Control and Prevention performed three health hazard evaluations at electronic scrap recycling facilities in the U.S. to characterize employee exposure to metals and recommend control strategies to reduce these exposures. We performed air, surface, and biological monitoring for metals...
December 9, 2016: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/27936192/insecticidal-activity-of-melaleuca-alternifolia-essential-oil-and-rna-seq-analysis-of-sitophilus-zeamais-transcriptome-in-response-to-oil-fumigation
#2
Min Liao, Jin-Jing Xiao, Li-Jun Zhou, Yang Liu, Xiang-Wei Wu, Ri-Mao Hua, Gui-Rong Wang, Hai-Qun Cao
BACKGROUND: The cereal weevil, Sitophilus zeamais is one of the most destructive pests of stored cereals worldwide. Frequent use of fumigants for managing stored-product insects has led to the development of resistance in insects. Essential oils from aromatic plants including the tea oil plant, Melaleuca alternifolia may provide environmentally friendly alternatives to currently used pest control agents. However, little is known about molecular events involved in stored-product insects in response to plant essential oil fumigation...
2016: PloS One
https://www.readbyqxmd.com/read/27935969/effects-of-heavy-metals-from-soil-and-dust-source-on-dna-damage-of-the-leymus-chinensis-leaves-in-coal-mining-area-in-northwest-china
#3
Tianxin Li, Minjie Zhang, Zhongming Lu, Uwizeyimana Herman, Dzivaidzo Mumbengegwi, John Crittenden
Air and soil pollution from mining activities has been considered as a critical issue to the health of living organisms. However, few efforts have been made in distinguishing the main pathway of organism genetic damage by heavy metals related to mining activities. Therefore, we investigated the genetic damage of Leymus chinensis leaf cells, the air particulate matter (PM) contents, and concentrations of the main heavy metals (Pb, Cd, Cr, Hg) in soil and foliar dust samples collected from seven experiment points at the core mining area and one control point 20 kilometers away from the core mining area in Inner Mongolia in 2013...
2016: PloS One
https://www.readbyqxmd.com/read/27932851/computational-fluid-dynamic-modeling-of-a-medium-sized-surface-mine-blasthole-drill-shroud
#4
Y Zheng, W R Reed, L Zhou, J P Rider
The Pittsburgh Mining Research Division of the U.S. National Institute for Occupational Safety and Health (NIOSH) recently developed a series of models using computational fluid dynamics (CFD) to study airflows and respirable dust distribution associated with a medium-sized surface blasthole drill shroud with a dry dust collector system. Previously run experiments conducted in NIOSH's full-scale drill shroud laboratory were used to validate the models. The setup values in the CFD models were calculated from experimental data obtained from the drill shroud laboratory and measurements of test material particle size...
November 2016: Mining Engineering
https://www.readbyqxmd.com/read/27928474/comparison-effect-of-intravenous-ketamine-with-pethidine-for-analgesia-and-sedation-during-bone-marrow-procedures-in-oncologic-children-a-randomized-double-blinded-crossover-trial
#5
Babak Abdolkarimi, Soheila Zareifar, Majid Golestani Eraghi, Fazl Saleh
Background: Children suffering from cancer always require pain relief and reduce anxiety when undergoing painful procedures. The aim of this study is to compare the effect of pethedine and ketamine administration in cancer-diagnosed children undergoing bone marrow aspiration and biopsy procedures. Subjects and Methods: A randomized, double-blinded, crossover trial was carried out on 57 children undergoing painful procedures (bone marrow aspiration/biopsy). Patients were randomly assigned in a double-blinded fashion to receive either intravenous pethedine (1 mg/kg/dose) or ketamine (1 mg/kg/dose), respectively...
October 1, 2016: International Journal of Hematology-oncology and Stem Cell Research
https://www.readbyqxmd.com/read/27925149/behavioural-interventions-to-promote-workers-use-of-respiratory-protective-equipment
#6
REVIEW
Bao Yen Luong Thanh, Malinee Laopaiboon, David Koh, Pornpun Sakunkoo, Hla Moe
BACKGROUND: Respiratory hazards are common in the workplace. Depending on the hazard and exposure, the health consequences may include: mild to life-threatening illnesses from infectious agents, acute effects ranging from respiratory irritation to chronic lung conditions, or even cancer from exposure to chemicals or toxins. Use of respiratory protective equipment (RPE) is an important preventive measure in many occupational settings. RPE only offers protection when worn properly, when removed safely and when it is either replaced or maintained regularly...
December 7, 2016: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/27924259/cation-limited-kinetic-model-for-microbial-extracellular-electron-transport-via-an-outer-membrane-cytochrome-c-complex
#7
REVIEW
Akihiro Okamoto, Yoshihide Tokunou, Junki Saito
Outer-membrane c-type cytochrome (OM c-Cyt) complexes in several genera of iron-reducing bacteria, such as Shewanella and Geobacter, are capable of transporting electrons from the cell interior to extracellular solids as a terminal step of anaerobic respiration. The kinetics of this electron transport has implications for controlling the rate of microbial electron transport during bioenergy or biochemical production, iron corrosion, and natural mineral cycling. Herein, we review the findings from in-vivo and in-vitro studies examining electron transport kinetics through single OM c-Cyt complexes in Shewanella oneidensis MR-1...
2016: Biophysics and Physicobiology
https://www.readbyqxmd.com/read/27922840/sevoflurane-exposure-during-the-critical-period-affects-synaptic-transmission-and-mitochondrial-respiration-but-not-long-term-behavior-in-mice
#8
Woosuk Chung, Min Jeong Ryu, Jun Young Heo, Soomin Lee, Seunghwan Yoon, Haram Park, Sangil Park, Yangsik Kim, Yoon Hee Kim, Seok Hwa Yoon, Yong Sup Shin, Won Hyung Lee, Xianshu Ju, Gi Ryang Kweon, Youngkwon Ko
BACKGROUND: Anesthesia during the synaptogenic period induces dendritic spine formation, which may affect neurodevelopment. The authors, therefore, evaluated whether changes in synaptic transmission after dendritic spine formation induced by sevoflurane were associated with long-term behavioral changes. The effects of sevoflurane on mitochondrial function were also assessed to further understand the mechanism behind spinogenesis. METHODS: Postnatal day 16 to 17 mice were exposed to sevoflurane (2...
December 6, 2016: Anesthesiology
https://www.readbyqxmd.com/read/27921261/attempting-to-compensate-for-reduced-neuronal-nitric-oxide-synthase-protein-with-nitrate-supplementation-cannot-overcome-metabolic-dysfunction-but-rather-has-detrimental-effects-in-dystrophin-deficient-mdx-muscle
#9
Cara A Timpani, Adam J Trewin, Vanesa Stojanovska, Ainsley Robinson, Craig A Goodman, Kulmira Nurgali, Andrew C Betik, Nigel Stepto, Alan Hayes, Glenn K McConell, Emma Rybalka
Duchenne muscular dystrophy arises from the loss of dystrophin and is characterized by calcium dysregulation, muscular atrophy, and metabolic dysfunction. The secondary reduction of neuronal nitric oxide synthase (nNOS) from the sarcolemma reduces NO production and bioavailability. As NO modulates glucose uptake, metabolism, and mitochondrial bioenergetics, we investigated whether an 8-week nitrate supplementation regimen could overcome metabolic dysfunction in the mdx mouse. Dystrophin-positive control (C57BL/10) and dystrophin-deficient mdx mice were supplemented with sodium nitrate (85 mg/l) in drinking water...
December 5, 2016: Neurotherapeutics: the Journal of the American Society for Experimental NeuroTherapeutics
https://www.readbyqxmd.com/read/27921142/intra-population-variability-of-ocean-acidification-impacts-on-the-physiology-of-baltic-blue-mussels-mytilus-edulis-integrating-tissue-and-organism-response
#10
L S Stapp, J Thomsen, H Schade, C Bock, F Melzner, H O Pörtner, G Lannig
Increased maintenance costs at cellular, and consequently organism level, are thought to be involved in shaping the sensitivity of marine calcifiers to ocean acidification (OA). Yet, knowledge of the capacity of marine calcifiers to undergo metabolic adaptation is sparse. In Kiel Fjord, blue mussels thrive despite periodically high seawater PCO2, making this population interesting for studying metabolic adaptation under OA. Consequently, we conducted a multi-generation experiment and compared physiological responses of F1 mussels from 'tolerant' and 'sensitive' families exposed to OA for 1 year...
December 5, 2016: Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
https://www.readbyqxmd.com/read/27918326/anesthetic-considerations-for-patients-with-congenital-central-hypoventilation-syndrome-a-systematic-review-of-the-literature
#11
Saptashree M Basu, Frances F Chung, Shireen F AbdelHakim, Jean Wong
Congenital central hypoventilation syndrome (CCHS) is a form of sleep-disordered breathing characterized by a diminished drive to breathe during sleep, despite progressive hypercapnia and hypoxia. The condition results from mutations in the paired-like homeobox 2B (PHOX2B) gene. The aim of this review was to conduct a systematic search of the current data on CCHS as it relates to perioperative considerations and to discuss the classification, prevalence, pathophysiology, presentation, genetics, and management of the condition...
December 1, 2016: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/27917680/development-of-nitrogen-and-methane-losses-in-the-first-eight-weeks-of-lactation-in-holstein-cows-subjected-to-deficiency-of-utilisable-crude-protein-under-restrictive-feeding-conditions
#12
Franz Sutter, Angela Schwarm, Michael Kreuzer
Low-protein diets are increasingly being used in dairy cow nutrition to minimise noxious nitrogen (N) emissions. However, at parturition, the lower milk yield at that time may mask deficiency in dietary utilisable crude protein (uCP; equivalent to metabolisable protein). Under restrictive feeding conditions, farmers would limit the feed allowance to match the lower measured milk yield, thereby exacerbating the deficiency. The consequences for N emission intensity per kg milk yield and methane emissions are unknown...
February 2017: Archives of Animal Nutrition
https://www.readbyqxmd.com/read/27914638/planting-richness-affects-the-recovery-of-vegetation-and-soil-processes-in-constructed-wetlands-following-disturbance
#13
Mary M Means, Changwoo Ahn, Gregory B Noe
The resilience of constructed wetland ecosystems to severe disturbance, such as a mass herbivory eat-out or soil disturbance, remains poorly understood. In this study, we use a controlled mesocosm experiment to examine how original planting diversity affects the ability of constructed freshwater wetlands to recover structurally and functionally after a disturbance (i.e., aboveground harvesting and soil coring). We assessed if the planting richness of macrophyte species influences recovery of constructed wetlands one year after a disturbance...
December 1, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27913023/in-stream-metabolism-and-atmospheric-carbon-sequestration-in-a-groundwater-fed-karst-stream
#14
Junbing Pu, Jianhong Li, Mitra B Khadka, Jonathan B Martin, Tao Zhang, Shi Yu, Daoxian Yuan
Atmospheric carbon sequestered in karst systems through dissolution of carbonate minerals is considered to have no net effect on long-term regional and global carbon budgets because precipitation of dissolved carbonate minerals emits CO2 back to the atmosphere. Even though recent studies have implied that rapid kinetics of carbonate dissolution coupled with the aquatic photosynthetic uptake of dissolve inorganic carbon (DIC) could facilitate a stable atmospheric C sink in karst rivers and streams, little is known about the magnitudes and long-term stability of this C sink...
November 29, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27909839/biventricular-support-using-a-centrifugal-pump-in-a-6%C3%A2-year-old-with-fulminant-myocarditis
#15
Hiromu Kehara, Tamaki Takano, Takamitsu Terasaki, Kenji Okada
We experienced a case of ventricular assist with both a pulsatile-flow and a continuous-flow pump in a pediatric patient, and herein report the clinical course and characteristics of the pumps. A 6-year-old female was diagnosed with fulminant myocarditis and transferred to our hospital for mechanical support. After 12 days of extracorporeal membrane oxygenation, we implanted a left ventricular assist device (LVAD) and a right ventricular assist device (RVAD) using centrifugal Gyro pumps with a membrane oxygenator in a paracorporeal fashion...
December 1, 2016: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/27909035/randomised-controlled-pilot-study-to-investigate-the-effectiveness-of-thoracic-epidural-and-paravertebral-blockade-in-reducing-chronic-post-thoracotomy-pain-topic-feasibility-study-protocol
#16
Joyce Yeung, Teresa Melody, Amy Kerr, Babu Naidu, Lee Middleton, Kostas Tryposkiadis, Jane Daniels, Fang Gao
INTRODUCTION: Open chest surgery (thoracotomy) is considered the most painful of surgical procedures. Forceful wound retraction, costochondral dislocation, posterior costovertebral ligament disruption, intercostal nerve trauma and wound movement during respiration combine to produce an acute, severe postoperative pain insult and persistent chronic pain many months after surgery is common. Three recent systematic reviews conclude that unilateral continuous paravertebral blockade (PVB) provides analgesia at least equivalent to thoracic epidural blockade (TEB) in the postoperative period, has a lower failure rate, and symptom relief that lasted months...
December 1, 2016: BMJ Open
https://www.readbyqxmd.com/read/27906496/aerobic-expression-of-vitreoscilla-hemoglobin-improves-the-growth-performance-of-cho-k1-cells
#17
Mariana Juárez, Claudia H González-De la Rosa, Elisa Memún, Juan-Carlos Sigala, Alvaro R Lara
Inefficient carbon metabolism is a relevant issue during the culture of mammalian cells for the production of biopharmaceuticals. Therefore, cell engineering strategies to improve the metabolic and growth performance of cell lines are needed. The expression of Vitreoscilla stercoraria hemoglobin (VHb) has been shown to significantly reduce overflow metabolism and improve the aerobic growth of bacteria. However, the effects of VHb on mammalian cells have been rarely studied. Here, the impact of VHb on growth and lactate accumulation during CHO-K1 cell culture was investigated...
December 1, 2016: Biotechnology Journal
https://www.readbyqxmd.com/read/27903433/cold-acclimation-allows-drosophila-flies-to-maintain-mitochondrial-functioning-under-cold-stress
#18
Hervé Colinet, David Renault, Damien Roussel
Environmental stress generally disturbs cellular homeostasis. Researchers have hypothesized that chilling injury is linked to a shortage of ATP. However, previous studies conducted on insects exposed to nonfreezing low temperatures presented conflicting results. In this study, we investigated the mitochondrial bioenergetics of Drosophila melanogaster flies exposed to chronic cold stress (4 °C). We assessed mitochondrial oxygen consumption while monitoring the rate of ATP synthesis at various times (0, 1, 2, and 3 days) during prolonged cold stress and at two assay temperatures (25 and 4 °C)...
November 27, 2016: Insect Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/27902622/efficacy-and-safety-of-penetration-acupuncture-on-head-for-acute-intracerebral-hemorrhage-a-randomized-controlled-study
#19
Hai-Qiao Wang, Chun-Ling Bao, Zhi-Hua Jiao, Gui-Rong Dong
BACKGROUND: Acupuncture, especially acupuncture treatment on head for acute intracerebral hemorrhage (ICH), has long been disputable. The aim of this study was to evaluate the efficacy and safety of penetration acupuncture on head in patients with acute ICH. METHODS: Eighty-two patients with acute ICH were randomized to receive penetration acupuncture treatment on head combined with conventional treatment (treatment group [TG]) or conventional treatment only (control group [CG])...
November 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27901646/the-time-dependent-health-and-biochemical-effects-in-rats-exposed-to-stainless-steel-welding-dust-and-its-soluble-form
#20
Tadeusz Halatek, Magdalena Stanislawska, Irena Kaminska, Malgorzata Cieslak, Radoslaw Swiercz, Wojciech Wasowicz
Welding processes that generate fumes containing toxic metals, such as hexavalent chromium (Cr(VI)), manganese (Mn), and nickel (Ni), have been implicated in lung injury, inflammation, and lung tumor promotion in animal models. The principal objective of this study was to determine the dynamics of toxic effects of inhalation exposure to morphologically rated welding dust from stainless steel welding and its soluble form in TSE System with a dynamic airflow. We assessed the pulmonary toxicity of welding dust in Wistar rats exposed to 60...
November 30, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
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