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https://www.readbyqxmd.com/read/29786775/stormram-4-an-mr-safe-robotic-system-for-breast-biopsy
#1
Vincent Groenhuis, Françoise J Siepel, Jeroen Veltman, Jordy K van Zandwijk, Stefano Stramigioli
Suspicious lesions in the breast that are only visible on magnetic resonance imaging (MRI) need to be biopsied under MR guidance with high accuracy and efficiency for accurate diagnosis. The aim of this study is to present a novel robotic system, the Stormram 4, and to perform preclinical tests in an MRI environment. Excluding racks and needle, its dimensions are 72 × 51 × 40 mm. The Stormram 4 is driven by two linear and two curved pneumatic stepper motors. The linear motor is capable of exerting 63 N of force at a pressure of 0...
May 21, 2018: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/29785958/association-between-hypertensive-disorders-in-pregnancy-and-particulate-matter-in-the-contiguous-united-states-1999-2004
#2
Tao Xue, Tong Zhu, Weiwei Lin, Evelyn O Talbott
Hypertensive disorders in pregnancy harm both maternal and infant health and have been linked to ambient particulate matter. However, existing studies are restricted to a local scale and remain inconsistent. A large-scale study is required to enrich the epidemiological evidence and explore the potential sources of the inconsistency. Making use of US birth certificates (1999-2004), and monitoring data from the environmental protection agency air quality networks, we associated hypertensive disorders in pregnancy with maternal exposure to fine particles or coarse particles using logistic regression analysis after adjusting for many covariates among >5 million subjects in the contiguous United States...
May 21, 2018: Hypertension
https://www.readbyqxmd.com/read/29784550/school-environmental-conditions-and-links-to-academic-performance-and-absenteeism-in-urban-mid-atlantic-public-schools
#3
J D Berman, M C McCormack, K A Koehler, F Connolly, D Clemons-Erby, M F Davis, C Gummerson, P J Leaf, T D Jones, F C Curriero
School facility conditions, environment, and perceptions of safety and learning have been investigated for their impact on child development. However, it is important to consider how the environment separately influences academic performance and attendance after controlling for school and community factors. Using results from the Maryland School Assessment, we considered outcomes of school-level proficiency in reading and math plus attendance and chronic absences, defined as missing 20 or more days, for grades 3-5 and 6-8 at 158 urban schools...
May 2, 2018: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/29783843/big-groundwater-datasets-reveal-possible-rare-contamination-amid-otherwise-improved-water-quality-for-some-analytes-in-a-region-of-marcellus-shale-development
#4
Tao Wen, Xianzeng Niu, Matthew Gonzales, Guanjie Zheng, Zhenhui Li, Susan Louise Brantley
Eleven thousand groundwater samples collected in the 2010s in an area of Marcellus shale-gas development are analyzed to assess spatial and temporal patterns of water quality. Using a new data mining technique, we confirm previous observations that methane concentrations in groundwater tend to be naturally elevated in valleys and near faults, but we also show that methane is also more concentrated near anticlines. Data mining also highlights waters with elevated methane that are not otherwise explained by geologic features...
May 22, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29783275/assessment-of-likelihood-ratio-for-four-contact-dermatitis-symptoms-of-vinca-minor
#5
Suman Bagchi, Chaturbhuja Nayak, Lex Rutten, Munmun Koley, Subhranil Saha, Mousumi Roy, Sk Jahir Abbas, Simantini Ghosh, Suman Halder, Ghulam Nabi Wani, Anaitulah Ahmad Mir, Showket Ahmad Bhat
BACKGROUND:  Contact dermatitis (CD) is a frequently occurring medical condition, for which Vinca minor (VM) is one of the recommended homeopathic medicines. However, the symptoms indicating this medicine have not yet been assessed systematically. Likelihood ratio (LR), based on Bayesian statistics, may yield better estimation of a medicine's indication than the existing method of entry of symptoms into materia medica and repertories. METHODS:  We investigated LRs of four CD symptoms of VM: (1) great sensitiveness of skin, with redness and soreness from slightest rubbing; (2) weeping eczema with foul, thick crusts; (3) itching amelioration in open air; and (4) CD of scalp...
May 21, 2018: Homeopathy: the Journal of the Faculty of Homeopathy
https://www.readbyqxmd.com/read/29783115/long-term-trends-in-no-2-columns-related-to-economic-developments-and-air-quality-policies-from-1997-to-2016-in-china
#6
Xiuying Zhang, Wuting Zhang, Xuehe Lu, Xuejun Liu, Dongmei Chen, Lei Liu, Xianjin Huang
This study detected the long-term trends in NO2 concentrations in China from 1997 to 2016 based on the NO2 columns from GOME, SCIAMACHY, and GOME-2A. Both differences in the time-overlapped NO2 columns from GOME vs. SCIAMACHAY and SCIAMACHAY vs. GOME-2A showed seasonal variations, and the annual NO2 columns from GOME were 0.9% higher than those from SCIAMACHY, which exceeded that from GOME-2A by 14%. The long-term trends of the NO2 columns on a provincial scale could be simulated by cubic models (0.60 < R2  < 0...
May 18, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29782888/pm-2-5-and-ozone-indicators-of-air-quality-and-acute-deaths-in-california-2004-2007
#7
Cheng You, Dennis K J Lin, S Stanley Young
Since the London Great Smog of 1952 was estimated to have killed over 4000 people, scientists have studied the relationship between air quality and acute mortality. Currently, the association between air quality and acute deaths is usually taken as evidence for causality. As air quality has markedly improved since 1952, do contemporary datasets support this view? We use a large dataset, eight air basins in California for the years 2004-2007, to examine the possible association of ozone and PM2.5 with acute deaths after statistically removing seasonal and weather effects...
May 18, 2018: Regulatory Toxicology and Pharmacology: RTP
https://www.readbyqxmd.com/read/29781095/gasoline-exhaust-damages-spermatogenesis-through-downregulating-%C3%AE-6-integrin-and-%C3%AE-1-integrin-in-the-rat-model
#8
L Luo, E Li, S Zhao, J Wang, Z Zhu, Y Liu, J Luo, Z Zhao
The health influence of air pollution has been an international public health concern. Increasing evidence has suggested that air pollution has been associated with decreased sperm quality. However, the underlying molecular mechanisms are still not fully elucidated. We aimed to verify whether gasoline exhaust leads to reproductive impairment by injuring spermatogonial stem cells and explore its underlying molecular mechanism. Twenty male Sprague-Dawley rats were randomly divided into two groups: the exposure group (n = 10) and the control group (n = 10)...
May 20, 2018: Andrologia
https://www.readbyqxmd.com/read/29780445/a-comparison-of-simulated-and-field-derived-leaf-area-index-lai-and-canopy-height-values-from-four-forest-complexes-in-the-southeastern-usa
#9
John S Iiames, Ellen Cooter, Donna Schwede, Jimmy Williams
Vegetative leaf area is a critical input to models that simulate human and ecosystem exposure to atmospheric pollutants. Leaf area index (LAI) can be measured in the field or numerically simulated, but all contain some inherent uncertainty that is passed to the exposure assessments that use them. LAI estimates for minimally managed or natural forest stands can be particularly difficult to develop as a result of interspecies competition, age and spatial distribution. Satellite-based LAI estimates hold promise for retrospective analyses, but we must continue to rely on numerical models for alternative management analysis...
2018: Forests
https://www.readbyqxmd.com/read/29778838/changes-in-cell-wall-pectins-and-their-relation-to-postharvest-mesocarp-softening-of-hass-avocados-persea-americana-mill
#10
Bruno G Defilippi, Troy Ejsmentewicz, María Paz Covarrubias, Orianne Gudenschwager, Reinaldo Campos-Vargas
The avocado is a climacteric fruit and begins a softening process after harvest. During ripening, the mesocarp changes in texture, and this affects fruit quality and cold storage capacity. Softening is commonly associated with cell wall disassembly in climacteric fruits. However, changes in the cell wall structure and composition during avocado softening are poorly understood. To understand this process, cell wall pectins in "Hass" avocado fruit were studied during ripening at 20 °C after harvest and after cold storage...
May 17, 2018: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29778687/droplets-deposition-pattern-from-a-prototype-of-a-fixed-spraying-system-in-a-sloping-vineyard
#11
Stefan Otto, Donato Loddo, Arno Schmid, Christian Roschatt, Maria Venturelli, Gerd Innerebner
In Italy high-quality vines are sometimes grown in small fields with slope steeper than 5-10%, where an air-blast sprayer is impractical so spray-gun application of pesticides is used, a technique that is very costly and labour intensive, and that causes high pesticide exposure of the operators. A possible alternative is the use of a fixed spraying system, and the first researches are in progress in Italy. A fixed spraying system prototype was built in a vineyard at Laimburg Research Centre with an upper line with micro-sprinkler and a lower line with cooler-type nozzles, and a trial was performed with the aim of measuring the deposition pattern of droplets on the row and between rows with water sensitive papers, also in comparison with a precise low-drift air-blast sprayer...
May 17, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29778177/effect-of-calcium-formate-as-an-additive-on-desulfurization-in-power-plants
#12
Zhenhua Li, Chunfang Xie, Jing Lv, Ruiguo Zhai
SO2 in flue gas needs to be eliminated to alleviate air pollution. As the quality of coal decreases and environmental standard requirements become more stringent, the high-efficiency desulfurization of flue gas faces more and more challenges. As an economical and environmentally friendly solution, the effect of calcium formate as an additive on desulfurization efficiency in the wet flue gas desulfurization (WFGD) process was studied for the first time. Improvement of the desulfurization efficiency was achieved with limited change in pH after calcium formate was added into the reactor, and it was found to work better than other additives tested...
May 2018: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29778176/a-comprehensive-classification-method-for-voc-emission-sources-to-tackle-air-pollution-based-on-voc-species-reactivity-and-emission-amounts
#13
Guohao Li, Wei Wei, Xia Shao, Lei Nie, Hailin Wang, Xiao Yan, Rui Zhang
In China, volatile organic compound (VOC) control directives have been continuously released and implemented for important sources and regions to tackle air pollution. The corresponding control requirements were based on VOC emission amounts (EA), but never considered the significant differentiation of VOC species in terms of atmospheric chemical reactivity. This will adversely influence the effect of VOC reduction on air quality improvement. Therefore, this study attempted to develop a comprehensive classification method for typical VOC sources in the Beijing-Tianjin-Hebei region (BTH), by combining the VOC emission amounts with the chemical reactivities of VOC species...
May 2018: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29778082/a-review-of-the-impacts-of-tobacco-heating-system-on-indoor-air-quality-versus-conventional-pollution-sources
#14
REVIEW
Violeta Kaunelienė, Marija Meišutovič-Akhtarieva, Dainius Martuzevičius
With the introduction of novel and potentially less polluting nicotine containing products to the market, the impacts of their usage to indoor air quality as opposed to conventional pollution sources must be reviewed and considered. This review study aimed to comparatively analyse changes in indoor air quality as the consequence of tobacco heating system (THS) generated pollution against general indoor air quality in various micro-environments, especially with combustion-based pollution sources present. Indoor concentrations of formaldehyde, acetaldehyde, benzene, toluene, nicotine and PM2...
May 8, 2018: Chemosphere
https://www.readbyqxmd.com/read/29776689/on-the-nexus-of-air-pollution-and-health-expenditures-new-empirical-evidence
#15
Carla Blázquez-Fernández, David Cantarero-Priento, Marta Pascual-Sáez
OBJECTIVE: To analyse the impact of per capita income and environmental air quality variables on health expenditure determinants. METHOD: In this study, we analyse the relationship between air pollution and health expenditure in 29 OECD countries over the period 1995-2014. In addition, we test whether our findings differ between countries with higher or lower incomes. RESULTS: The econometric results show that per capita income has a positive effect on health expenditure, but is not as statistically significant as expected when lag-time is incorporated...
May 15, 2018: Gaceta Sanitaria
https://www.readbyqxmd.com/read/29774404/quality-indicators-for-hip-fracture-care-a-systematic-review
#16
REVIEW
S C Voeten, P Krijnen, D M Voeten, J H Hegeman, M W J M Wouters, I B Schipper
Quality indicators are used to measure quality of care and enable benchmarking. An overview of all existing hip fracture quality indicators is lacking. The primary aim was to identify quality indicators for hip fracture care reported in literature, hip fracture audits, and guidelines. The secondary aim was to compose a set of methodologically sound quality indicators for the evaluation of hip fracture care in clinical practice. A literature search according to the PRISMA guidelines and an internet search were performed to identify hip fracture quality indicators...
May 17, 2018: Osteoporosis International
https://www.readbyqxmd.com/read/29772882/correlation-analysis-of-air-pollutant-index-levels-and-dengue-cases-across-five-different-zones-in-selangor-malaysia
#17
Loshini Thiruchelvam, Sarat C Dass, Rafdzah Zaki, Abqariyah Yahya, Vijanth S Asirvadam
This study investigated the potential relationship between dengue cases and air quality - as measured by the Air Pollution Index (API) for five zones in the state of Selangor, Malaysia. Dengue case patterns can be learned using prediction models based on feedback (lagged terms). However, the question whether air quality affects dengue cases is still not thoroughly investigated based on such feedback models. This work developed dengue prediction models using the autoregressive integrated moving average (ARIMA) and ARIMA with an exogeneous variable (ARIMAX) time series methodologies with API as the exogeneous variable...
May 7, 2018: Geospatial Health
https://www.readbyqxmd.com/read/29772780/the-radon-gas-in-underground-buildings-in-clay-soils-the-plaza-balmis-shelter-as-a-paradigm
#18
Carlos Rizo Maestre, Víctor Echarri Iribarren
In healthy buildings, it is considered essential to quantify air quality. One of the most fashionable indicators is radon gas. To determine the presence of this element, which is harmful to health, in the environment, the composition of the soil is studied. The presence of radon gas within a building depends both on the terrain in which it is located and on the composition of the materials of which it is composed, and not as was previously believed, only by the composition of the soil (whether granitic or not)...
May 17, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29770989/vitrification-for-bovine-embryos-with-low-quality-grade
#19
Hiroshi Tajimi, Tsugumi Yamazaki, Syoko Oike, Tatsuyuki Yoshida, Konosuke Okada, Masashige Kuwayama, Hitoshi Ushijima
This study was conducted to examine the utility of vitrification for bovine embryos with low-quality grade, and simple cryoprotectants dilution method for practitioners. In Experiment 1, survival of frozen embryos was compared with that of vitrified embryos using minimum volume cooling (MVC). Then, vitrified embryos were used to confirm the optimum sucrose concentration in Experiment 2. The survival rates of embryos that had been vitrified following diluted cryoprotectants with the one-step in-straw method were compared with those of fresh control embryos in Experiment 3...
May 17, 2018: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/29767217/assessing-mentorship-experiences-of-faculty-at-a-military-academic-center-challenge-and-opportunity
#20
Kevin C McMains, Rechell G Rodriguez, Jennifer Peel, Heather C Yun, Mark W True, Woodson S Jones
OBJECTIVES: Mentor relationships are a key component of professional development within academic medicine. To date, there are no investigations into the prevalence and effects of mentor relationships within military academic medicine. This quality improvement initiative aimed to establish the prevalence and effects of mentorship, including whether sex differences exist among faculty at a military academic center, the San Antonio Uniformed Services Health Education Consortium, and identify opportunities to improve faculty development efforts for mentorship to benefit faculty at this institution...
May 2018: Southern Medical Journal
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