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Industrial Health

Thomas E Bernard, Candi D Ashley, Ximena P Garzon, Jung-Hyun Kim, Aitor Coca
Wet bulb globe temperature (WBGT) index is used by many professionals in combination with metabolic rate and clothing adjustments to assess whether a heat stress exposure is sustainable. The progressive heat stress protocol is a systematic method to prescribe a clothing adjustment value (CAV) from human wear trials, and it also provides an estimate of apparent total evaporative resistance (Re,T,a). It is clear that there is a direct relationship between the two descriptors of clothing thermal effects with diminishing increases in CAV at high Re,T,a...
October 14, 2017: Industrial Health
Anugrah Shaw, Ana Carla Coleone-Carvalho, Julien Hollingshurst, Michael Draper, Joaquim Gonçalves Machado Neto
A collaborative approach, involving resources and expertise from several countries, was used to develop a test cell to measure cumulative permeation by a solid-state collection technique. The new technique was developed to measure the permeation of pesticide active ingredients and other chemicals with low vapor pressure that would otherwise be difficult to test via standard techniques. The development process is described and the results from the final chosen test method are reported. Inter-laboratory studies were conducted to further refine the new method and determine repeatability and reliability...
October 14, 2017: Industrial Health
Kirsi Jussila, Sirkka Rissanen, Anna Aminoff, Jens Wahlström, Arild Vaktskjold, Ljudmila Talykova, Jouko Remes, Satu Mänttäri, Hannu Rintamäki
Workers in the Arctic open-pit mines are exposed to harsh weather conditions. Employers are required to provide protective clothing for workers. This can be the outer layer, but sometimes also inner or middle layers are provided. This study aimed to determine how the Arctic open-pit miners protect themselves against cold and the sufficiency, and the selection criteria of the garments. Workers' cold experiences and the clothing in four Arctic open-pit mines in Finland, Sweden, Norway and Russia were evaluated by a questionnaire (n=1323)...
October 11, 2017: Industrial Health
Takashi Yamauchi, Toru Yoshikawa, Takeshi Sasaki, Shun Matsumoto, Masaya Takahashi, Machi Suka, Hiroyuki Yanagisawa
In Japan, overwork-related disorders occur among local public employees as well as those in private businesses. However, to date, there are no studies reporting the state of compensation for cerebrovascular/cardiovascular diseases (CCVD) and mental disorders due to overwork or work-related stress among local public employees in Japan over multiple years. This report examined the recent trend of overwork-related CCVD and mental disorders, including the incidence rates of these disorders, among local public employees in Japan from the perspective of compensation for public accidents, using data from the Japanese Government and relevant organizations...
October 11, 2017: Industrial Health
Masatake Yamauchi, Sachiko Sakuma
Health effects caused by ionizing radiations raise considerable concern among general public and radiation workers. To estimate ability of personal protective equipment (PPE) materials that reduce toxic effects of ionizing radiations, we developed an experimental bioassay system using Chinese Hamster V79 cells. The system developed here distinguished the biological effectiveness of X-ray that was significantly affected by elements composed of shielding materials. Survival of the cells exposed to sub-lethal dose of X-ray was enhanced more than 2 times when the X-ray was filtrated by a lead plate...
October 11, 2017: Industrial Health
Nobuyuki Shibata
Anti-vibration gloves have been used in real workplaces to reduce vibration transmitted through hand-held power tools to the hand. Generally materials used for vibration attenuation in gloves are resilient materials composed of certain synthetic and/or composite polymers. The mechanical characteristics of the resilient materials used in anti-vibration gloves are prone to be influenced by environmental conditions such as temperature, humidity, and photo-irradiation, which cause material degradation and aging...
October 5, 2017: Industrial Health
Limin Bao, Yanling Wang, Takeichiro Baba, Yasuhiro Fukuda, Kaoru Wakatsuki, Hideaki Morikawa
The purpose of this research was to enhance the stab resistance of protective clothing material by developing a new high-density nonwoven structure. Ice picks often injure Japanese police officers due to the strict regulation of swords in the country. Consequently, this study was designed to improve stab resistance against ice picks. Most existing anti-stab protective clothing research has focused on various fabrics impregnated with resin, an approach that brings with it problems of high cost and complicated processing...
October 5, 2017: Industrial Health
Noriko Shimasaki, Katsuaki Shinohara, Hideki Morikawa
For occupational safety, healthcare workers must select and wear appropriate personal protective equipment (PPE), protective clothing and masks, to countermeasure against exposure to infectious body fluid and blood splash. It is important for healthcare workers to ensure the protective performance against penetration of pathogens in each PPE. The International Standards Organization (ISO) 22609 test evaluates the effectiveness of medical face masks to protect against penetration of splashed synthetic blood...
October 5, 2017: Industrial Health
Ronald Heus, Emiel A Denhartog
To determine safe working conditions in emergency situations at petro-chemical plants in the Netherlands a study was performed on three protective clothing combinations (operator's, firefighter's and aluminized). The clothing was evaluated at four different heat radiation levels (3.0, 4.6, 6.3 and 10.0k∙W∙m(-2)) in standing and walking posture with a thermal manikin RadMan(TM). Time till pain threshold (43°C) is set as a cut-off criterion for regular activities.Operator's clothing did not fulfil requirements to serve as protective clothing for necessary activities at heat radiation levels above 1...
October 3, 2017: Industrial Health
Agnes Psikuta, Barbara Koelblen, Emel Mert, Piero Fontana, Simon Annaheim
Following the growing interest in the further development of manikins to simulate human thermal behaviour more adequately, thermo-physiological human simulators have been developed by coupling a thermal sweating manikin with a thermo-physiology model. Despite their availability and obvious advantages, the number of studies involving these devices is only marginal, which plausibly results from the high complexity of the development and evaluation process and need of multi-disciplinary expertise. The aim of this paper is to present an integrated approach to develop, validate and operate such devices including technical challenges and limitations of thermo-physiological human simulators, their application and measurement protocol, strategy for setting test scenarios, and the comparison to standard methods and human studies including details which have not been published so far...
September 29, 2017: Industrial Health
Yasuo Morimoto, Hiroto Izumi, Yukiko Yoshiura, Yuri Fujisawa, Kazuhiro Yatera, Katsuhide Fujita, Junko Maru, Shigehisa Endoh, Kazumasa Honda
In order to examine the usefulness of intratracheal instillation of nanoparticles for the screening of the harmful effects of nanoparticles, we performed intratracheal instillation studies of nanomaterials on rats using different delivery devices and postures as a basic study. Multiwall carbon nanotubes (MWCNTs) with a geometric mean length and secondary diameter of 2.16 μm and 752 nm, respectively, were used as the nanomaterials. Male F344 rats were intratracheally exposed to 0.04 or 0.2 mg/rat of MWCNT, were dissected at 1 day and 3 days, and cell analyses of the bronchoalveolar lavage fluid (BALF) were analyzed...
September 5, 2017: Industrial Health
Don-Hee Han, Yesol Park, Jae-Jong Woo
To get a better fit performance of filtering facepieces, a tight fitting net (TFN) was invented. This study was carried out to evaluate whether the TFN improves fit performance using a quantitative fit test (QNFT). The existing mask was of cup type with an aluminum clip on the nose bridge. The TFN mask was the same as the existing mask, but attached a TFN instead of aluminum clip. One hundred subjects (male 52, female 48) were selected to match fourfold in Korean 25-member facial size category for half-mask (KFCH)...
August 31, 2017: Industrial Health
Yukari Nakada, Aya Sugimoto, Hiroshi Kadotani, Naoto Yamada
Short sleep duration is a serious problem that not only enhances the risk of various mental and physical disorders, but also affects the productivity in the workplace. However, in terms of studies focused on workers, there are few reports that evaluated sleeping conditions in an objective way. The purpose of this study is to implement sleep health education in the workplace in terms of primary prevention of mental health disorder and then to investigate the subjective and objective effectiveness of the education using self-administered questionnaires (sleep duration, ESS, AIS, PHQ-9, SF-8) and an activity monitor (MTN-210)...
August 29, 2017: Industrial Health
Ravi Gautam, Yong Heo, GyeongDong Lim, EunSeob Song, Katharine Roque, JaeHee Lee, YeonGyeong Kim, AhRang Cho, SoJung Shin, ChangYul Kim, GiHwan Bang, JiYun Bahng, HyoungAh Kim
Exposure to bioaerosols in indoor animal farms associates with respiratory illnesses, but little is known about the immune modulation to chicken farmers. This study aimed to compare the general immunity of chicken farmers with those of control subjects with non-agricultural jobs. Blood taken from the farmers and controls was subjected to plasma IgE and IgG subclass measurements. Isolated peripheral blood mononuclear cells (PBMC) were stimulated and cytokine production was measured. Indoor total and respirable dust levels and their endotoxin (LPS) and aflatoxin (AF) levels in the farms were measured...
August 22, 2017: Industrial Health
George Rachiotis, Konstantinos Kostikas, Dimitra Pinotsi, Christos Hadjichristodoulou, Spyros Drivas
Greece is a significant cement producing country. The aim of this study was to investigate the prevalence and risk factors of lung function impairment among Greek cement workers. One hundred thirty- seven cement production workers participated in this study. In addition, 110 employees not exposed to cement dust comprised the control group. The concentration of cement total dust at workplace varied from 1.1 to 11.6 mg/m3. In only one of the measurements, the Threshold Limit Level of 10 mg/m3 has been exceeded...
August 22, 2017: Industrial Health
Yuichi Fukuda, Shinichi Iwasaki, Yasuhiko Deguchi, Koichiro Ogawa, Tomoko Nitta, Koki Inoue
After workers take long-term sickness absence due to mental disorders (LTSA-MD), the occupational stress of the coworkers in the same work unit might be affected. The aims of this study were to evaluate the effect of the incident of LTSA-MD on the coworkers' occupational stress. A retrospective cohort study of 16,032 public servants was conducted. The Brief Job Stress Questionnaire (BJSQ) was used, which was administered in 2011 and 2012. To analyze the amount of change in occupational stress, the difference between the scores of the BJSQ scales in 2011 and 2012 was calculated...
August 19, 2017: Industrial Health
A Virgílio M Oliveira, Adélio R Gaspar, António M Raimundo, Divo A Quintela
The objective of the present contribution is to assess the exposure to hot thermal environments in the Portuguese glass industry. For this purpose a field survey was carried out and the measurements took place in industrial units - five industries and nineteen workplaces were considered - so all the results are based on real working conditions. In order to assess the level of heat exposure the Wet Bulb Globe Temperature (WBGT) index and the Predicted Heat Strain (PHS) model, defined in ISO Standards 7243 (1989) and 7933 (2004), respectively, were used...
August 19, 2017: Industrial Health
Maria U Kottwitz, Christin Gerhardt, Diana Pereira, Lionel Iseli, Achim Elfering
Besides dealing with high workload, being a teacher is challenging with respect to the social context. There is increasing evidence that adverse social job characteristics challenge sleep quality. The current study tests whether restraint sleep quality (defined as worse sleep quality before than during vacation) is related to time-related job stressors, job resources, and social job characteristics.Forty-eight elementary school teachers (42% female) participated both during the last week before and the first week after vacation...
August 11, 2017: Industrial Health
Parvin Nassiri, Mohammad Reza Monazzam, Farideh Golbabaei, Somayeh Farhang Dehghan, Athena Rafieepour, Ali Reza Mortezapour, Mehdi Asghari
The purpose of this article is to examine the applicability of Universal Thermal Climate Index (UTCI) index as an innovative index for evaluating of occupational heat stress in outdoor environments. 175 workers of 12 open-pit mines in Tehran, Iran were selected for this research study. First, the environmental variables such as air temperature, wet-bulb temperature, globe temperature, relative humidity and air flow rate were measured; then UTCI, wet-bulb globe temperature (WBGT) and heat stress index (HSI) indices were calculated...
October 7, 2017: Industrial Health
Alberto Ranavolo, Tiwana Varrecchia, Martina Rinaldi, Alessio Silvetti, Mariano Serrao, Silvia Conforto, Francesco Draicchio
The aims of the present work were: to calculate lifting energy consumption (LEC) in work activities designed to have a growing lifting index (LI) by means of revised NIOSH lifting equation; to evaluate the relationship between LEC and forces at the L5-S1 joint. The kinematic and kinetic data of 20 workers were recorded during the execution of lifting tasks in three conditions. We computed kinetic, potential and mechanical energy and the corresponding LEC by considering three different centers of mass of: 1) the load (CoML); 2) the multi-segment upper body model and load together (CoMUpp+L); 3) the whole body and load together (CoMTot)...
October 7, 2017: Industrial Health
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