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https://www.readbyqxmd.com/read/29333991/evaluation-of-a-portable-gas-chromatograph-with-photoionization-detector-under-variations-of-voc-concentration-temperature-and-relative-humidity
#1
Jhy-Charm Soo, Eun Gyung Lee, Ryan F LeBouf, Michael L Kashon, William Chisholm, Martin Harper
The objective of this present study was to evaluate the performance of a portable gas chromatograph ─ photoionization detector (GC-PID), under various test conditions to determine if it could be used in occupational settings. A mixture of seven volatile organic compounds (VOCs) - acetone, ethylbenzene, methyl isobutyl ketone, toluene, m-xylene, p-xylene, and o-xylene - was selected because its components are commonly present in paint manufacturing industries. A full-factorial combination of four concentration levels (exposure scenarios) of VOC mixtures, three different temperatures (25˚C, 30˚C, and 35˚C), and three relative humidities (RHs; 25%, 50%, and 75%) was conducted in a full- size controlled environmental chamber...
January 15, 2018: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/29333807/contribution-of-diet-to-lead-exposure-among-children-aged-1-to-7-years-in-la-plata-buenos-aires
#2
Enrique Martins, Agustina Malpeli, Daniel Asens, Luis Telese, Victoria Fasano, Vania Vargas, Marina Tavella, Jorge E Colman Lerner
INTRODUCTION: Lead is a toxic metal which, even at low blood levels, can alter normal neurodevelopment in children, so no blood lead level is acceptable. Lead absorption from diet accounts for the highest contribution to blood lead levels in the population who is not exposed to contaminated environments or because of their occupation. The objective of this study was to determine the contribution of diet to lead exposure among children aged 1 to 7 years who attended Hospital de Niños de La Plata for health check-ups...
February 1, 2018: Archivos Argentinos de Pediatría
https://www.readbyqxmd.com/read/29333114/carcinogenesis-induced-by-low-dose-radiation
#3
Igor Piotrowski, Katarzyna Kulcenty, Wiktoria Maria Suchorska, Agnieszka Skrobała, Małgorzata Skórska, Marta Kruszyna-Mochalska, Anna Kowalik, Weronika Jackowiak, Julian Malicki
Background: Although the effects of high dose radiation on human cells and tissues are relatively well defined, there is no consensus regarding the effects of low and very low radiation doses on the organism. Ionizing radiation has been shown to induce gene mutations and chromosome aberrations which are known to be involved in the process of carcinogenesis. The induction of secondary cancers is a challenging long-term side effect in oncologic patients treated with radiation. Medical sources of radiation like intensity modulated radiotherapy used in cancer treatment and computed tomography used in diagnostics, deliver very low doses of radiation to large volumes of healthy tissue, which might contribute to increased cancer rates in long surviving patients and in the general population...
December 2017: Radiology and Oncology
https://www.readbyqxmd.com/read/29332268/methylmercury-intoxication-promotes-metallothionein-response-and-cell-damage-in-salivary-glands-of-rats
#4
Leidiane Alencar de Oliveira Lima, Leonardo Oliveira Bittencourt, Bruna Puty, Rafael Monteiro Fernandes, Priscila Cunha Nascimento, Marcia Cristina Freitas Silva, Sérgio Melo Alves-Junior, João de Jesus Viana Pinheiro, Rafael Rodrigues Lima
Environmental and occupational mercury exposure is considered a major public health issue. Despite being well known that MeHg exposure causes adverse effects in several physiologic functions, MeHg effects on salivary glands still not completely elucidated. Here, we investigated the cellular MeHg-induced damage in the three major salivary glands (parotid, submandibular, and sublingual) of adult rats after chronic, systemic and low doses of MeHg exposure. Rats were exposed by 0.04 mg/kg/day over 60 days. After that, animals were euthanized and all three glands were collected...
January 14, 2018: Biological Trace Element Research
https://www.readbyqxmd.com/read/29331707/the-mediation-effect-of-ptsd-perceived-job-stress-and-resilience-on-the-relationship-between-trauma-exposure-and-the-development-of-depression-and-alcohol-use-problems-in-korean-firefighters-a-cross-sectional-study
#5
Johanna Inhyang Kim, Heyeon Park, Jeong-Hyun Kim
BACKGROUND: Firefighters constitute a high-risk group for depression and alcohol use disorders (AUDs) due to frequent exposure to trauma. Perceived job stress and resilience are powerful factors affecting the occurrence of depression and AUDs; however, research on this subject is scarce. METHODS: We investigated the relationship of perceived job stress and resilience with depression or AUDs in firefighters. A total of 7151 Korean firefighters were included for analysis...
December 29, 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/29330341/biomechanics-of-coupled-motion-in-the-cervical-spine-during-simulated-whiplash-in-patients-with-pre-existing-cervical-or-lumbar-spinal-fusion-a-finite-element-study
#6
H Huang, R W Nightingale, A B C Dang
OBJECTIVES: Loss of motion following spine segment fusion results in increased strain in the adjacent motion segments. However, to date, studies on the biomechanics of the cervical spine have not assessed the role of coupled motions in the lumbar spine. Accordingly, we investigated the biomechanics of the cervical spine following cervical fusion and lumbar fusion during simulated whiplash using a whole-human finite element (FE) model to simulate coupled motions of the spine. METHODS: A previously validated FE model of the human body in the driver-occupant position was used to investigate cervical hyperextension injury...
January 2018: Bone & Joint Research
https://www.readbyqxmd.com/read/29328060/-i-in-vivo-i-neutron-activation-analysis-of-bone-manganese-in-workers
#7
Yingzi Liu, Danelle Rolle-McFarland, Farshad Mostafaei, Yuanzhong Zhou, Yan Li, Wei Zheng, Ellen Wells, Linda Huiling Nie
Manganese (Mn) is a neurotoxicant. However, the impact of elevated, chronic Mn exposure is not well understood, partially due to the lack of a cumulative exposure biomarker. To address this gap, our group developed a compact <i>in vivo</i> neutron activation analysis (IVNAA) system to quantify Mn in bone (MnBn). In this study, we used this system and determined MnBn among male Chinese workers and compared results to their blood Mn (MnB), a measure of recent exposure, and the years of employment, a measure of cumulative exposure...
January 12, 2018: Physiological Measurement
https://www.readbyqxmd.com/read/29328055/an-analysis-of-radon-levels-in-the-basements-of-uk-workplaces-and-review-of-when-employers-should-test
#8
Tracy Dawn Gooding
Radon is a recognised lung carcinogen. The main source of radon in UK buildings is the ground. As basements have more ground contact than other parts of a building, and often limited ventilation, there is an increased potential for high radon levels to occur. Regulations are in place in the UK to control radon exposures at work, which prompt employers to undertake risk assessments, test where necessary and take action if levels exceed certain thresholds. Both Public Health England (PHE) and the Health and Safety Executive (HSE) currently advise employers to test routinely occupied basements for radon, irrespective of geographical location; the minimum annual occupancy threshold has been established as one hour per week (approximately 50 hours per year)...
January 12, 2018: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/29327654/delayed-reaction-the-tardy-embrace-of-physical-organic-chemistry-by-the-german-chemical-community
#9
Stephen J Weininger
The emergence of physical organic chemistry, which focuses on the mechanisms and structures of organic reactions and molecules using the tools of physical chemistry, was a major development in twentieth-century chemistry. It first flourished in the interwar period, in the UK and then in the US. Germany, by contrast, did not embrace the field until almost a half century later. The great success of classical organic chemistry, especially in synthesis, encouraged indifference to the new field among German chemists, as did their inductivist research philosophy, as enunciated by Walter Hückel's ground-breaking textbook (1931)...
January 12, 2018: Ambix
https://www.readbyqxmd.com/read/29325088/the-comet-assay-ready-for-30-more-years
#10
Peter Møller
During the last 30 years, the comet assay has become widely used for the measurement of DNA damage and repair in cells and tissues. A landmark achievement was reached in 2016 when the Organization for Economic Co-operation and Development adopted a comet assay guideline for in vivo testing of DNA strand breaks in animals. However, the comet assay has much more to offer than being an assay for testing DNA strand breaks in animal organs. The use of repair enzymes increases the range of DNA lesions that can be detected with the assay...
January 6, 2018: Mutagenesis
https://www.readbyqxmd.com/read/29324816/changes-in-respiratory-and-non-respiratory-symptoms-in-occupants-of-a-large-office-building-over-a-period-of-moisture-damage-remediation-attempts
#11
Ju-Hyeong Park, Sook Ja Cho, Sandra K White, Jean M Cox-Ganser
There is limited information on the natural history of building occupants' health in relation to attempts to remediate moisture damage. We examined changes in respiratory and non-respiratory symptoms in 1,175 office building occupants over seven years with multiple remediation attempts. During each of four surveys, we categorized participants using a severity score: 0 = asymptomatic; 1 = mild, symptomatic in the last 12 months, but not frequently in the last 4 weeks; 2 = severe, symptomatic at least once weekly in the last 4 weeks...
2018: PloS One
https://www.readbyqxmd.com/read/29324727/frequent-exertion-and-frequent-standing-at-work-by-industry-and-occupation-group-united-states-2015
#12
Taylor M Shockey, Sara E Luckhaupt, Matthew R Groenewold, Ming-Lun Lu
Repeated exposure to occupational ergonomic hazards, such as frequent exertion (repetitive bending or twisting) and frequent standing, can lead to injuries, most commonly musculoskeletal disorders (1). Work-related musculoskeletal disorders have been estimated to cost the United States approximately $2.6 billion in annual direct and indirect costs (2). A recent literature review provided evidence that prolonged standing at work also leads to adverse health outcomes, such as back pain, physical fatigue, and muscle pain (3)...
January 12, 2018: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/29324056/cardiopulmonary-effects-induced-by-occupational-exposure-to-titanium-dioxide-nanoparticles
#13
Lin Zhao, Yifang Zhu, Zhangjian Chen, Huadong Xu, Jingwen Zhou, Shichuan Tang, Zhizhen Xu, Fanling Kong, Xinwei Li, Yifei Zhang, Xianzuo Li, Ji Zhang, Guang Jia
Although some toxicological studies have reported that exposure to titanium dioxide nanoparticles (nano-TiO2) may elicit adverse cardiopulmonary effects, related data collected from human are currently limited. The purpose of this study is to explore cardiopulmonary effects among workers who were exposed to nano-TiO2 and to identify biomarkers associated with exposure. A cross-sectional study was conducted in a nano-TiO2 manufacturing plant in eastern China. Exposure assessment and characterization of TiO2 particles were performed in a packaging workshop...
January 11, 2018: Nanotoxicology
https://www.readbyqxmd.com/read/29323398/night-shift-work-and-hematological-cancers-a-population-based-case-control-study-in-three-nordic-countries
#14
Madar Talibov, Eero Pukkala, Jan Ivar Martinsen, Laufey Tryggvadottir, Elisabete Weiderpass, Johnni Hansen
Objective The aim of this case-control study was to assess the effect of night-shift work on the risk of hematological cancers. Methods The study included 39 371 leukemia, 56 713 non-Hodgkin lymphoma, 9322 Hodgkin lymphoma, and 26 188 multiple myeloma cases diagnosed between 1961 and 2005 in Finland, Sweden, and Iceland. Five controls for each case were selected from the Nordic Occupational Cancer Study (NOCCA) cohort, matched by year of birth, sex and country. Night-shift exposure was assessed by using the NOCCA job-exposure matrix (JEM)...
January 11, 2018: Scandinavian Journal of Work, Environment & Health
https://www.readbyqxmd.com/read/29320591/the-use-of-an-over-the-counter-hand-cream-with-sweet-almond-oil-for-the-treatment-of-hand-dermatitis
#15
Joshua A Zeichner, Diane Berson, Angela Donald
Hand dermatitis is estimated to affect greater than 15% of the general population. Childhood eczema, frequent hand washing, and occupational exposure to chemicals are predisposing factors. Hand dermatitis treatment involves both prevention of outbreaks and treatment of active disease. Moisturizers are essential to protect the skin from the environment, enhance hydration, and repair the skin barrier. They have been shown in large studies to prevent occupational related breakouts. Natural oils are commonly used in moisturizers for their moisturizing and emollient properties...
January 1, 2018: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/29320232/barriers-to-the-adoption-of-wearable-sensors-in-the-workplace-a-survey-of-occupational-safety-and-health-professionals
#16
Mark C Schall, Richard F Sesek, Lora A Cavuoto
OBJECTIVE: To gather information on the (a) types of wearable sensors, particularly personal activity monitors, currently used by occupational safety and health (OSH) professionals; (b) potential benefits of using such technologies in the workplace; and (c) perceived barriers preventing the widespread adoption of wearable sensors in industry. BACKGROUND: Wearable sensors are increasingly being promoted as a means to improve employee health and well-being, and there is mounting evidence supporting their use as exposure assessment and personal health tools...
January 1, 2018: Human Factors
https://www.readbyqxmd.com/read/29319538/-hidden-occupational-allergens-such-as-additives
#17
Santiago Quirce, Darío Antolín-Amérigo, Javier Domínguez-Ortega
PURPOSE OF REVIEW: With the development of innovative technologies, new agents are continually introduced to the workplace. Some of these agents can act as hidden allergens whenever they are not declared in the product labels or whenever their health hazards are unknown. This review article focuses on the identification and description of unusual and/or hidden allergens recently incriminated in occupational diseases. RECENT FINDINGS: Occupational exposure is an important global health issue that can induce respiratory and cutaneous disorders, as well as life-threatening anaphylaxis...
January 9, 2018: Current Opinion in Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29319452/characterization-of-airborne-btex-exposures-during-use-of-lawnmowers-and-trimmers
#18
Heather J Avens, Joshua R Maskrey, Allison L Insley, Kenneth M Unice, Rachel C D Reid, Jennifer Sahmel
Few studies have evaluated airborne exposures to benzene, toluene, ethylbenzene, and xylenes (BTEX) during operation of two-stroke and four-stroke small engines, such as those in lawn maintenance equipment. Full-shift, 8-hour personal samples were collected during a simulation study to characterize yard maintenance activities including mowing, trimming, and fueling. Short-term, 15-minute personal samples were collected to separately evaluate mowing and trimming exposures. Mean 8-hour time weighted average (TWA) BTEX concentrations were 2...
January 10, 2018: Archives of Environmental & Occupational Health
https://www.readbyqxmd.com/read/29319054/association-between-metabolic-syndrome-and-job-rank
#19
Ramin Mehrdad, Gholamreza Pouryaghoub, Mahboubeh Moradi
BACKGROUND: The occupation of the people can influence the development of metabolic syndrome. OBJECTIVE: To determine the association between metabolic syndrome and its determinants with the job rank in workers of a large car factory in Iran. METHODS: 3989 male workers at a large car manufacturing company were invited to participate in this cross-sectional study. Demographic and anthropometric data of the participants, including age, height, weight, and abdominal circumference were measured...
January 2018: International Journal of Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/29319052/measurement-of-lung-cancer-tumor-markers-in-a-glass-wool-company-workers-exposed-to-respirable-synthetic-vitreous-fiber-and-dust
#20
Shabnam Abtahi, Mahyar Malekzadeh, Ghafour Nikravan, Abbas Ghaderi
BACKGROUND: Occupational exposures to respirable synthetic vitreous fiber (SVF) and dust are associated with many lung diseases including lung cancer. Low-dose computed tomography is used for screening patients who are highly suspicious of having lung carcinoma. However, it seems not to be cost-effective. Serum biomarkers could be a useful tool for the surveillance of occupational exposure, by providing the possibility of diagnosing lung cancer in its early stages. OBJECTIVE: To determine if serum carcinoembryonic antigen (CEA) and cytokeratin fragment (CYFRA) 21-1 levels in workers exposed more than normal population to respirable SVF and dust may be used as indicators of progression towards lung cancer...
January 2018: International Journal of Occupational and Environmental Medicine
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