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https://www.readbyqxmd.com/read/29938840/zero-linear-compressibility-in-nondense-borates-with-a-lu-ban-stool-like-structure
#1
Xingxing Jiang, Yi Yang, Maxim S Molokeev, Pifu Gong, Fei Liang, Shuaihua Wang, Lei Liu, Xiang Wu, Xiaodong Li, Yanchun Li, Shaofan Wu, Wei Li, Yicheng Wu, Zheshuai Lin
Discovering materials that exhibit zero linear compressibility (ZLC) behavior under hydrostatic pressure is extremely difficult. To date, only a handful of ZLC materials have been found, and almost all of them are ultrahard materials with densified structures. Here, to explore ZLC in nondense materials, a structural model analogous to the structure of the "Lu-Ban stool," a product of traditional Chinese woodworking invented 2500 years ago, is proposed. The application of this model to borates leads to the discovery of ZLC in AEB2 O4 (AE = Ca and Sr) with the unique "Lu-Ban stool"-like structure, which can obtain a subtle mechanical balance between pressure-induced expansion and contraction effects...
June 25, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29928526/development-and-validation-of-a-practical-instrument-for-injury-prevention-the-occupational-safety-and-health-monitoring-and-assessment-tool-osh-mat
#2
Yi Sun, Martin Arning, Frank Bochmann, Jutta Börger, Thomas Heitmann
Background: The Occupational Safety and Health Monitoring and Assessment Tool (OSH-MAT) is a practical instrument that is currently used in the German woodworking and metalworking industries to monitor safety conditions at workplaces. The 12-item scoring system has three subscales rating technical, organizational, and personnel-related conditions in a company. Each item has a rating value ranging from 1 to 9, with higher values indicating higher standard of safety conditions. Methods: The reliability of this instrument was evaluated in a cross-sectional survey among 128 companies and its validity among 30,514 companies...
June 2018: Safety and Health At Work
https://www.readbyqxmd.com/read/29872156/large-scale-additive-manufacturing-with-bioinspired-cellulosic-materials
#3
Naresh D Sanandiya, Yadunund Vijay, Marina Dimopoulou, Stylianos Dritsas, Javier G Fernandez
Cellulose is the most abundant and broadly distributed organic compound and industrial by-product on Earth. However, despite decades of extensive research, the bottom-up use of cellulose to fabricate 3D objects is still plagued with problems that restrict its practical applications: derivatives with vast polluting effects, use in combination with plastics, lack of scalability and high production cost. Here we demonstrate the general use of cellulose to manufacture large 3D objects. Our approach diverges from the common association of cellulose with green plants and it is inspired by the wall of the fungus-like oomycetes, which is reproduced introducing small amounts of chitin between cellulose fibers...
June 5, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29861469/alternative-carrier-solvents-for-pigments-extracted-from-spalting-fungi
#4
Lauren Pittis, Diego Rodrigues de Oliveira, Sarath M Vega Gutierrez, Seri C Robinson
The use of both naturally occurring and synthetic pigmented wood has been prevalent in woodcraft for centuries. Modern manifestations generally involve either woodworkers' aniline dyes, or pigments derived from a special class of fungi known as spalting fungi. While fungal pigments are more renewable than anilines and pose less of an environmental risk, the carrier required for these pigments-dichloromethane (DCM)-is both problematic for humans and tends to only deposit the pigments on the surface of wood instead of evenly within the material...
May 27, 2018: Materials
https://www.readbyqxmd.com/read/29756404/nasal-fibroscopy-as-a-routine-screening-procedure-of-sinonasal-adenocarcinoma-of-woodworkers-french-longitudinal-case-study
#5
Julie Martin, Flora Vayr, Christophe Paris, Sébastien Vergez, Peggy Krief, Amandine Luc, Julie Corvisier, Ludovic de Gabory, Fabrice Herin
BACKGROUND: The purpose of this study was to assess the relevancy of flexible nasoendoscopy as a routine screening procedure of sinonasal adenocarcinoma among people occupationally exposed to wood dust. METHODS: This study included woodworkers, occupationally exposed to wood dust. Evaluations were scheduled at the time of inclusion (T0) and after a 2-year period (T1). A questionnaire was used for standardized data collection. The score was based on anatomic landmarks on each side that are parts of the olfactory clefts: the area of middle turbinate, the anterior part of the olfactory cleft, the top of the choanal arch, the spheno-ethmoidal recess, the posterior part of the olfactory cleft, and the middle part of the olfactory cleft...
May 13, 2018: Head & Neck
https://www.readbyqxmd.com/read/29621947/comparison-of-two-music-training-approaches-on-music-and-speech-perception-in-cochlear-implant-users
#6
Christina D Fuller, John J Galvin, Bert Maat, Deniz Başkent, Rolien H Free
In normal-hearing (NH) adults, long-term music training may benefit music and speech perception, even when listening to spectro-temporally degraded signals as experienced by cochlear implant (CI) users. In this study, we compared two different music training approaches in CI users and their effects on speech and music perception, as it remains unclear which approach to music training might be best. The approaches differed in terms of music exercises and social interaction. For the pitch/timbre group, melodic contour identification (MCI) training was performed using computer software...
January 2018: Trends in Hearing
https://www.readbyqxmd.com/read/29505360/household-immigration-status-had-differential-impact-on-medicaid-enrollment-in-expansion-and-nonexpansion-states
#7
Michael S Cohen, William L Schpero
Recent research has shown that concern about the apprehension and deportation of undocumented immigrants can affect how members of their households who are eligible for public benefits choose to participate in public programs. The extent to which this "chilling effect" broadly affects adults' Medicaid enrollment nationally remains unclear, in part because of the difficulty of isolating undocumented immigrants in survey data. In this study we identified households that likely included undocumented immigrants and then examined whether gains in health care coverage due to the expansion of Medicaid eligibility under the Affordable Care Act (ACA) were dampened for eligible people living in households with mixed immigration status...
March 2018: Health Affairs
https://www.readbyqxmd.com/read/29493030/enantioselective-synthesis-of-fully-benzenoid-single-and-double-carbohelicenes-via-gold-catalyzed-intramolecular-hydroarylation
#8
Masakazu Satoh, Yu Shibata, Ken Tanaka
The enantioselective synthesis of fully benzenoid single and double carbo[6]helicenes has been achieved via the gold-catalyzed intramolecular hydroarylation. The single crystal of the racemic double carbo[6]helicene consists of unique layer structures like timbers with halving joints in the woodworking. Furthermore, the double carbo[6]helicenes exhibited relatively large CPL activities among chiral small organic molecules.
April 11, 2018: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29409653/classification-scheme-and-prevention-measures-for-caught-in-between-occupational-fatalities
#9
Chia-Fen Chi, Syuan-Zih Lin
The current study analyzed 312 caught-in-between fatalities caused by machinery and vehicles. A comprehensive and mutually exclusive coding scheme was developed to analyze and code each caught-in-between fatality in terms of age, gender, experience of the victim, type of industry, source of injury, and causes for these accidents. Boolean algebra analysis was applied on these 312 caught-in-between fatalities to derive minimal cut set (MCS) causes associated with each source of injury. Eventually, contributing factors and common accident patterns associated with (1) special process machinery including textile, printing, packaging machinery, (2) metal, woodworking, and special material machinery, (3) conveyor, (4) vehicle, (5) crane, (6) construction machinery, and (7) elevator can be divided into three major groups through Boolean algebra and MCS analysis...
April 2018: Applied Ergonomics
https://www.readbyqxmd.com/read/29334871/biomonitoring-of-arsenic-in-woodworkers-exposed-to-cca-and-evaluation-of-other-non-occupational-sources-in-uruguay
#10
Valery Bühl, María Cristina Álvarez, María H Torre, Mariela Pistón, Nelly Mañay
In Uruguay wood-impregnation plants use chromated copper arsenate (CCA) as preservative applying good manufacture practices (GMP). This study aims a retrospective evaluation of toxicologically relevant species levels in CCA exposed woodworker's urine (As-U) and an assessment of the effects of work risk factors and non-occupational sources in As-U of workers from a selected plant. From 2014 to 2016, As-U in 212 urine samples (As-U) of 73 woodworkers from six CCA impregnation plants were determined. In one of these plants, 35 workers were interviewed to obtain individual data of work tasks, lifestyles, diet, habits, etc...
January 2017: International Journal of Occupational and Environmental Health
https://www.readbyqxmd.com/read/29169917/primary-cutaneous-blastomycosis-after-inoculation-from-a-woodworking-blade
#11
Barry Ladizinski, Nicole Joy, David C Reid
No abstract text is available yet for this article.
January 2018: Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28979180/the-effect-of-different-workplace-nanoparticles-on-the-immune-systems-of-employees
#12
Natalja Kurjane, Tija Zvagule, Jelena Reste, Zanna Martinsone, Ilona Pavlovska, Inese Martinsone, Ivars Vanadzins
Currently, nanoparticles are widely present in the environment and are being used in various industrial technologies. Nanoparticles affect immune functions, causing different immune responses. The aim of the current study was to evaluate several cytokines, interleukin (IL)-1b, IL-6, IL-8, tumour necrosis factor-a (TNF-α), interferon-γ, adhesive molecule sICAM-1, macrophage inhibitory protein 1a (MIP1a) and secretory immunoglobulin A, in nasal lavage fluid and in the peripheral blood of healthy subjects exposed to workplace nanoparticles...
2017: Journal of Nanoparticle Research: An Interdisciplinary Forum for Nanoscale Science and Technology
https://www.readbyqxmd.com/read/28859747/auricular-hemosiderosis-in-a-diabetic-patient
#13
Krista N Larson, Mark A Russell
A 74-year-old Caucasian man with poorly controlled diabetes and hypertension was seen in the dermatology clinic for treatment of a nodular basal cell carcinoma on his right temple. He had poorly controlled diabetes for decades and had been insulin dependent for 20 to 25 years. He had not been on any anticoagulation therapy in the past or present and had no history of a hematologic disorder. He was retired and did woodworking as a hobby. During a routine presurgical head and neck skin examination, he was noted to have macular bluegray dyspigmentation of the central portion of the anterior portion of his ear lobes, bilaterally (Figure 1)...
2017: Skinmed
https://www.readbyqxmd.com/read/28841385/characterization-of-wood-dust-emission-from-hand-held-woodworking-machines
#14
F-X Keller, F Chata
This article focuses on the prevention of exposure to wood dust when operating electrical hand-held sawing and sanding machines. A laboratory methodology was developed to measure the dust concentration around machines during operating processes. The main objective was to characterize circular saws and sanders, with the aim of classifying the different power tools tested in terms of dust emission (high dust emitter vs. low dust emitter). A test set-up was developed and is described and a measurement methodology was determined for each of the two operations studied...
January 2018: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28829721/assessment-of-indoor-levels-of-volatile-organic-compounds-and-carbon-dioxide-in-schools-in-kuwait
#15
Layla Al-Awadi
Indoor air quality (IAQ) in schools is a matter of concern because children are most vulnerable and sensitive to pollutant exposure. Conservation of energy at the expense of ventilation in heating, ventilation, and air conditioning (HVAC) systems adversely affects IAQ. Extensive use of new materials in building, fitting, and refurbishing emit various pollutants such that the indoor environment creates its own discomfort and health risks. Various schools in Kuwait were selected to assess their IAQ. Comprehensive measurements of volatile organic compounds (VOCs) consisting of 72 organic compounds consisting of aliphatic (C3 -C6 ), aromatic (C6 -C9 ), halogenated (C1 -C7 ), and oxygenated (C2 -C9 ) functional groups in indoor air were made for the first time in schools in Kuwait...
January 2018: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/28791982/health-education-effect-on-knowledge-and-practice-of-workplace-personal-hygiene-and-protective-measures-among-woodworkers-in-enugu-nigeria
#16
L Ezeugwu, E N Aguwa, S U Arinze-Onyia, T A Okeke
BACKGROUND: There has been increasing incidence of occupational diseases among woodworkers due to exposure to preventable hazards in the workplace. The objective of this study was to determine the effects of health education on the knowledge and practice of workplace hygiene and protective measures among woodworkers in Enugu timber market. MATERIALS AND METHODS: This was a before and after study conducted among 290 woodworkers using interviewer administered semi-structured questionnaire and manual on workplace hazards prevention...
July 2017: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/28788136/wood-colorization-through-pressure-treating-the-potential-of-extracted-colorants-from-spalting-fungi-as-a-replacement-for-woodworkers-aniline-dyes
#17
Sara C Robinson, Eric Hinsch, Genevieve Weber, Kristina Leipus, Daniel Cerney
The extracellular colorants produced by Chlorociboria aeruginosa, Scytalidium cuboideum, and Scytalidium ganodermophthorum, three commonly utilized spalting fungi, were tested against a standard woodworker's aniline dye to determine if the fungal colorants could be utilized in an effort to find a naturally occurring replacement for the synthetic dye. Fungal colorants were delivered in two methods within a pressure treater-the first through solubilization of extracted colorants in dichloromethane, and the second via liquid culture consisting of water, malt, and the actively growing fungus...
July 24, 2014: Materials
https://www.readbyqxmd.com/read/28780566/effect-of-reduced-use-of-organic-solvents-on-disability-pension-in-painters
#18
Bengt Järvholm, Alex Burdorf
OBJECTIVE: To investigate whether the decreased use of paints based on organic solvents has caused a decreased risk for neuropsychiatric disorders in painters by studying their incidence in disability pensions. METHODS: The incidence of disability pension in Swedish painters who had participated in health examinations between 1971 and 1993 was studied through linkage with Swedish registers of disability pension over 1971-2010 and compared with the incidence in other construction workers as woodworkers, concrete workers and platers...
November 2017: Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/28453349/chronic-exertional-compartment-syndrome-of-the-hand-case-report-and-literature-review
#19
C Liam Dwyer, Maximillian C Soong, N George Kasparyan
BACKGROUND: Chronic exertional compartment syndrome (CECS) is characterized by activity-induced pain, swelling, and decreased muscle function due to increased pressure and decreased circulation within a confined muscle compartment. Although well-known to occur in the leg, involvement of the hand has rarely been reported in the literature. METHODS: We present a 44 year old male with CECS involving bilateral thenar and hypothenar compartments. Symptoms were reproduced on exam by driving screws into wood with a screwdriver...
May 2017: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/28319791/premium-subsidies-the-mandate-and-medicaid-expansion-coverage-effects-of-the-affordable-care-act
#20
Molly Frean, Jonathan Gruber, Benjamin D Sommers
Using premium subsidies for private coverage, an individual mandate, and Medicaid expansion, the Affordable Care Act (ACA) has increased insurance coverage. We provide the first comprehensive assessment of these provisions' effects, using the 2012-2015 American Community Survey and a triple-difference estimation strategy that exploits variation by income, geography, and time. Overall, our model explains 60% of the coverage gains in 2014-2015. We find that coverage was moderately responsive to price subsidies, with larger gains in state-based insurance exchanges than the federal exchange...
May 2017: Journal of Health Economics
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