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https://www.readbyqxmd.com/read/28613849/covalency-in-americium-iii-hexachloride
#1
Justin N Cross, Jing Su, Enrique R Batista, Samantha K Cary, William J Evans, Stosh A Kozimor, Veronika Mocko, Brian L Scott, Benjamin W Stein, Cory J Windorff, Ping Yang
Developing a better understanding of covalency (or orbital mixing) is of fundamental importance. Covalency occupies a central role in directing chemical and physical properties for almost any given compound or material. Hence, the concept of covalency has potential to generate broad and substantial scientific advances, ranging from biological applications to condensed matter physics. Given the importance of orbital mixing combined with the difficultly in measuring covalency, estimating or inferring covalency often leads to fiery debate...
June 14, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28609175/center-for-the-polyurethanes-industry-summary-of-unpublished-industrial-hygiene-studies-related-to-the-evaluation-of-emissions-of-spray-polyurethane-foam-insulation
#2
Richard D Wood
Spray polyurethane foam (SPF) insulation is used as thermal insulation for residential and commercial buildings. It has many advantages over other forms insulation; however, concerns have been raised related to chemical emissions during and after application. The American Chemistry Council's (ACC's) Center for the Polyurethanes Industry (CPI) has gathered previously unpublished industrial hygiene air sampling studies submitted by member companies that were completed during an eight year period from 2007 to 2014...
June 13, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28597857/services-for-depression-and-suicide-in-thailand
#3
Thoranin Kongsuk, Suttha Supanya, Kedsaraporn Kenbubpha, Supranee Phimtra, Supattra Sukhawaha, Jintana Leejongpermpoon
Depression, together with suicide is an important contributor to the burden of disease in Thailand. Until recently, depression has been significantly under-recognized in the country. The lack of response to this health challenge has been compounded by a low level of access to standard care, constraints on mental health personnel and inadequate dissemination of knowledge in caring for people with these disorders. In the past decade, significant work has been undertaken to establish a new evidence-based surveillance and care system for depression and suicide in Thailand that operates at all levels of health-care provision nationwide...
April 2017: WHO South-East Asia Journal of Public Health
https://www.readbyqxmd.com/read/28573033/inducible-versus-constitutive-social-immunity-examining-effects-of-colony-infection-on-glucose-oxidase-and-defensin-1-production-in-honeybees
#4
Margarita M López-Uribe, Andrea Fitzgerald, Michael Simone-Finstrom
Honeybees use a variety of defence mechanisms to reduce disease infection and spread throughout the colony. Many of these defences rely on the collective action of multiple individuals to prevent, reduce or eradicate pathogens-often referred to as 'social immunity'. Glucose oxidase (GOX) and some antimicrobial peptides (e.g. defensin-1 or Def1) are secreted by the hypopharyngeal gland of adult bees on larval food for their antiseptic properties. Because workers secrete these compounds to protect larvae, they have been used as 'biomarkers' for social immunity...
May 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/28549369/safety-analysis-of-occupational-exposure-of-healthcare-workers-to-residual-contaminations-of-cytotoxic-drugs-using-fmeca-security-approach
#5
Laetitia Minh Mai Le, Delphine Reitter, Sophie He, Franck Té Bonle, Amélie Launois, Diane Martinez, Patrice Prognon, Eric Caudron
Handling cytotoxic drugs is associated with chemical contamination of workplace surfaces. The potential mutagenic, teratogenic and oncogenic properties of those drugs create a risk of occupational exposure for healthcare workers, from reception of starting materials to the preparation and administration of cytotoxic therapies. The Security Failure Mode Effects and Criticality Analysis (FMECA) was used as a proactive method to assess the risks involved in the chemotherapy compounding process. FMECA was carried out by a multidisciplinary team from 2011 to 2016...
December 1, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28542566/proteomic-analysis-in-the-dufour-s-gland-of-africanized-apis-mellifera-workers-hymenoptera-apidae
#6
Aparecida das Dores Teixeira, Patricia D Games, Benjamin B Katz, John M Tomich, José C Zanuncio, José Eduardo Serrão
The colony of eusocial bee Apis mellifera has a reproductive queen and sterile workers performing tasks such as brood care and foraging. Chemical communication plays a crucial role in the maintenance of sociability in bees with many compounds released by the exocrine glands. The Dufour's gland is a non-paired gland associated with the sting apparatus with important functions in the communication between members of the colony, releasing volatile chemicals that influence workers roles and tasks. However, the protein content in this gland is not well studied...
2017: PloS One
https://www.readbyqxmd.com/read/28521771/cancer-incidence-among-finnish-male-cobalt-production-workers-in-1969-2013-a-cohort-study
#7
Riitta Sauni, Panu Oksa, Jukka Uitti, Asko Linna, Raimo Kerttula, Eero Pukkala
BACKGROUND: There is inadequate evidence for the carcinogenicity of cobalt and cobalt compounds in humans. Consequently, the International Agency for Research on Cancer (IARC) has evaluated cobalt metal without tungsten carbide as possibly carcinogenic to humans (Group 2B). The aim of the study was to assess the risk of cancer among workers employed in a Finnish cobalt plant since the beginning of production in 1968. METHODS: The study cohort consisted of all males employed by the Finnish cobalt plant for at least a year during 1968-2004...
May 18, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28512369/-nanopesticides-light-or-dark-side-of-the-force
#8
REVIEW
Magdalena Matysiak, Marcin Kruszewski, Lucyna Kapka-Skrzypczak
Nanotechnology has been used in many branches of industry, including agriculture, where nanomaterials are used as carriers of chemical plant protection compounds, as well as active ingredients. Meanwhile, the effects of nanopesticides exposure on the human body are unknown. Due to their occupation, farmers should be particularly monitored. This paper summarizes the use of nanoparticles in agriculture, the route of potential exposure for agricultural workers and the current state of knowledge of nanopesticides toxicity to mammalian cells...
May 16, 2017: Medycyna Pracy
https://www.readbyqxmd.com/read/28490760/hormonal-pleiotropy-helps-maintain-queen-signal-honesty-in-a-highly-eusocial-wasp
#9
Ricardo Caliari Oliveira, Ayrton Vollet-Neto, Cintia Akemi Oi, Jelle S van Zweden, Fabio Nascimento, Colin Sullivan Brent, Tom Wenseleers
In insect societies, both queens and workers produce chemicals that reliably signal caste membership and reproductive status. The mechanisms that help to maintain the honesty of such queen and fertility signals, however, remain poorly studied. Here we test if queen signal honesty could be based on the shared endocrine control of queen fertility and the production of specific signals. In support of this "hormonal pleiotropy" hypothesis, we find that in the common wasp, application of methoprene (a juveline hormone analogue) caused workers to acquire a queen-like cuticular hydrocarbon profile, resulting in the overproduction of known queen pheromones as well as some compounds typically linked to worker fertility...
May 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28477162/polychlorinated-biphenyls-and-their-hydroxylated-metabolites-in-the-serum-of-e-waste-dismantling-workers-from-eastern-china
#10
Shengtao Ma, Guofa Ren, Xiangying Zeng, Zhiqiang Yu, Guoying Sheng, Jiamo Fu
A number of studies have reported on the exposure of e-waste dismantling workers to significantly high concentrations of halogenated organic pollutants such as polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers. Such exposure can have adverse health effects. However, little information on the metabolites of these contaminants exists. In this study, we investigated PCBs levels and their hydroxylated metabolites (OH-PCB) in the serum of e-waste workers in Taizhou in eastern China. Our results indicate elevated PCB and OH-PCB levels in the serum of the workers, with medians of 443...
May 5, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28448810/associations-between-blood-btexs-concentrations-and-hematologic-parameters-among-adult-residents-of-the-u-s-gulf-states
#11
Brett T Doherty, Richard K Kwok, Matthew D Curry, Christine Ekenga, David Chambers, Dale P Sandler, Lawrence S Engel
BACKGROUND: Studies of workers exposed to benzene at average air concentrations below one part per million suggest that benzene, a known hematotoxin, causes hematopoietic damage even at low exposure levels. However, evidence of such effects outside of occupational settings and for other volatile organic compounds (VOCs) is limited. OBJECTIVE: To investigate associations between ambient exposures to five VOCs, including benzene, and hematologic parameters among adult residents of the U...
July 2017: Environmental Research
https://www.readbyqxmd.com/read/28444322/fumigant-activity-of-sweet-orange-essential-oil-fractions-against-red-imported-fire-ants-hymenoptera-formicidae
#12
Wei Hu, Ning Zhang, Hongli Chen, Balian Zhong, Aixue Yang, Fan Kuang, Zhigang Ouyang, Jiong Chun
Sweet orange oil fractions were prepared by molecular distillation of cold-pressed orange oil from sample A (Citrus sinensis (L.) 'Hamlin' from America) and sample B (Citrus sinensis Osbeck 'Newhall' from China) respectively, and their fumigant activities against medium workers of red imported fire ants (Solenopsis invicta Buren) were investigated. The volatile composition of the orange oil fractions was identified and quantified using GC-MS. Fractions from sample A (A1, A2, and A3) contained 23, 37, and 48 chemical constituents, and fractions from sample B (B1, B2, and B3) contained 18, 29, and 26 chemical constituents, respectively...
April 21, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28431005/occupational-asthma-caused-by-acrylic-compounds-from-shield-surveillance-1989-2014
#13
G I Walters, A S Robertson, V C Moore, P S Burge
Background: Acrylic monomers (acrylates), methacrylates and cyanoacrylates all cause asthma by respiratory sensitization. Occupational inhalation exposures occur across a variety of industries including health care and dental work, beauty, laboratory science, assembly and plastic moulding. Aims: To examine notifications of occupational asthma caused by acrylic compounds from a UK-based regional surveillance scheme, in order to highlight prevalent exposures and trends in presentation...
June 1, 2017: Occupational Medicine
https://www.readbyqxmd.com/read/28426518/pathophysiologic-insight-into-mesoamerican-nephropathy
#14
Magdalena Madero, Fernando E García-Arroyo, Laura-Gabriela Sánchez-Lozada
PURPOSE OF REVIEW: Mesoamerican nephropathy (MeN) is an emerging pathophysiological entity of Chronic kidney desease (CKD) not related to traditional risk factors (diabetes and hypertension) that have caused thousands of deaths in Central America, mainly in sugarcane workers. The focus of this review is to discuss the risk factors and probable mechanisms involved in the initiation and progression of this devastating disease. RECENT FINDINGS: Frequent episodes of subclinical Acute kidney injury caused by repetitive heat stress, dehydration, and strenuous work have been regarded as the main risk factors for MeN...
July 2017: Current Opinion in Nephrology and Hypertension
https://www.readbyqxmd.com/read/28417225/comparative-proteomic-analysis-provides-insight-into-10-hydroxy-2-decenoic-acid-biosynthesis-in-honey-bee-workers
#15
Xiao-Hui Yang, Shi-Fa Yang, Rui-Ming Wang
10-Hydroxy-2-decenoic acid (10-HDA) is the major compound produced from the mandibular glands (MGs) of honey bee workers. However, little information is available on the molecular mechanisms of 10-HDA biosynthesis. In our study, based on investigating the 10-HDA secretion pattern and the morphological characteristics of MGs from honey bee workers of different ages, a comparative proteomic analysis was performed in the MGs of workers with different 10-HDA production. In total, 59 up-regulated protein species representing 45 unique proteins were identified in high 10-HDA-producing workers by 2-DE-MALDI-TOF/TOF MS...
April 17, 2017: Amino Acids
https://www.readbyqxmd.com/read/28396010/analysis-of-the-variability-of-the-pharmacokinetics-of-multiple-drugs-in-young-adult-and-elderly-subjects-and-its-implications-for-acceptable-daily-exposures-and-cleaning-validation-limits
#16
REVIEW
Anthony J Streeter, Ellen C Faria
The elderly constitute a significant, potentially sensitive, subpopulation within the general population, which must be taken into account when performing risk assessments including determining an acceptable daily exposure (ADE) for the purpose of a cleaning validation. Known differences in the pharmacokinetics of drugs between young adults (who are typically the subjects recruited into clinical trials) and the elderly are potential contributors affecting the interindividual uncertainty factor (UFH) component of the ADE calculation...
March 20, 2017: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/28395344/occurrence-of-fumigants-and-hazardous-off-gassing-chemicals-in-shipping-containers-arriving-in-sweden
#17
Urban Svedberg, Gunnar Johanson
Containerized cargo shipment makes up the backbone of international trade. The principal aim of this cross-sectional study was to establish a qualitative and quantitative description of gaseous fumigants and volatile off-gassing substances facing workers tasked with entering shipping containers. A total of 372 packed and 119 empty shipping containers were sampled in six ports and two distribution centers in Sweden. Fourier-transform infrared spectrometry (FTIR) and photoionization detection (PID) were the analytical methods applied to the bulk of samples...
March 1, 2017: Annals of Work Exposures and Health
https://www.readbyqxmd.com/read/28393646/-start-development-of-an-intervention-for-a-first-stabilization-and-arousal-modulation-for-highly-stressed-minor-refugees
#18
Andrea Dixius, Eva Möhler
START - Development of an Intervention for a First Stabilization and Arousal-modulation for Highly Stressed Minor Refugees This article focuses on the development of an intervention called "Stress-Traumasymptoms- Arousal-Regulation-Treatment" (START), through the process of working with refugeed minors in acute stress during the clearing process immediately on arrival in Germany. START is a short manualized structured intervention for crisis intervention and stabiliziation of children and adolescents suffering from intense stress and acute tension or desperation...
April 2017: Praxis der Kinderpsychologie und Kinderpsychiatrie
https://www.readbyqxmd.com/read/28387332/odorant-cues-linked-to-social-immunity-induce-lateralized-antenna-stimulation-in-honey-bees-apis-mellifera-l
#19
Alison McAfee, Troy F Collins, Lufiani L Madilao, Leonard J Foster
Hygienic behaviour (HB) is a social immunity trait in honey bees (Apis mellifera L.) whereby workers detect, uncap and remove unhealthy brood, improving disease resistance in the colony. This is clearly economically valuable; however, the molecular mechanism behind it is not well understood. The freeze-killed brood (FKB) assay is the conventional method of HB selection, so we compared odour profiles of FKB and live brood to find candidate HB-inducing odours. Surprisingly, we found that significantly more brood pheromone (β-ocimene) was released from FKB...
April 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28386800/chemical-ecology-of-stingless-bees
#20
Sara Diana Leonhardt
Stingless bees (Hymenoptera, Apidae: Meliponini) represent a highly diverse group of social bees confined to the world's tropics and subtropics. They show a striking diversity of structural and behavioral adaptations and are important pollinators of tropical plants. Despite their diversity and functional importance, their ecology, and especially chemical ecology, has received relatively little attention, particularly compared to their relative the honeybee, Apis mellifera. Here, I review various aspects of the chemical ecology of stingless bees, from communication over resource allocation to defense...
April 6, 2017: Journal of Chemical Ecology
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