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Tatiana E Burtseva, Tatiana N Ammosova, Natalia N Protopopova, Svetlana Y Yakovleva, Maya P Slobodchikova
Type I congenital methemoglobinemia is an autosomal recessive disorder. A high frequency of congenital methemoglobinemia has been reported among Native Americans inhabiting the Yukon-Kuskokwim Delta. Other rare cases of congenital methemoglobinemia of types I and II have been reported in Japan and other countries. In Russia-namely, in Yakutia-a high frequency of type I congenital methemoglobinemia has been reported. In 2009, the Consultation Polyclinic of the Pediatric Center in Yakutsk city established a registry of children with congenital methemoglobinemia...
November 22, 2016: Journal of Pediatric Hematology/oncology
Robert H Coker, Alyssa N Weaver, Melynda S Coker, Carl J Murphy, Hanns-Christian Gunga, Mathias Steinach
PURPOSE: The Yukon Arctic Ultra is considered the longest and coldest ultraendurance event in the world. Cold exposure and exercise has been reported to influence circulating levels of myo-, adipo- and hepato-kines that may influence considerable alterations in the regulation of metabolism. The purpose of the study was to evaluate the influence of the Yukon Arctic Ultra (430 mile event) on potential activators of brown fat, metabolites and body composition in healthy individuals. METHODS: Eight male and female participants (mean±SEM; age = 44±3 yr; BMI = 23...
September 16, 2016: Medicine and Science in Sports and Exercise
Jeffery R Werner, Elizabeth A Gillis, Rudy Boonstra, Charles J Krebs
Throughout much of North America's boreal forest, the cyclical fluctuations of snowshoe hare populations (Lepus americanus) may cause other herbivores to become entrained in similar cycles. Alternating apparent competition via prey switching followed by positive indirect effects are the mechanisms behind this interaction. Our purpose is to document a change in the role of indirect interactions between sympatric populations of hares and arctic ground squirrels (Urocitellus parryii plesius), and to emphasize the influence of predation for controlling ground squirrel numbers...
2016: PeerJ
Sina Kazemi, Ido Hatam, Brian Lanoil
Alpine glaciers are retreating rapidly, exposing foreland minerals, which develop into soils. Bacterial communities in glacier forelands exhibit high rates of turnover and undergo dramatic shifts in composition within the first 50 years after deglaciation, followed by relative stabilization and convergence. This period of microbial development occurs simultaneously with plant colonization in most systems; thus, it remains unclear whether the changes in the bacterial communities occur primarily as the result of edaphic, climatic, or biotic factors...
September 6, 2016: Molecular Ecology
Diane M O'Brien, Kenneth E Thummel, Lisa R Bulkow, Zhican Wang, Brittany Corbin, Joseph Klejka, Scarlett E Hopkins, Bert B Boyer, Thomas W Hennessy, Rosalyn Singleton
OBJECTIVE: To measure the trends in traditional marine food intake and serum vitamin D levels in Alaska Native women of childbearing age (20-29 years old) from the 1960s to the present. DESIGN: We measured a biomarker of traditional food intake, the δ15N value, and vitamin D level, as 25-hydroxycholecalciferol (25(OH)D3) concentration, in 100 serum samples from 20-29-year-old women archived in the Alaska Area Specimen Bank, selecting twenty-five per decade from the 1960s to the 1990s...
July 28, 2016: Public Health Nutrition
Jessica M Young-Robertson, W Robert Bolton, Uma S Bhatt, Jordi Cristóbal, Richard Thoman
The terrestrial water cycle contains large uncertainties that impact our understanding of water budgets and climate dynamics. Water storage is a key uncertainty in the boreal water budget, with tree water storage often ignored. The goal of this study is to quantify tree water content during the snowmelt and growing season periods for Alaskan and western Canadian boreal forests. Deciduous trees reached saturation between snowmelt and leaf-out, taking up 21-25% of the available snowmelt water, while coniferous trees removed <1%...
2016: Scientific Reports
Javier Torréns
Pseudochalcura Ashmead is a genus of parasitic wasps within Eucharitidae (Chalcidoidea) that are all parasitoids of ants. The genus is widespread in the New World, with different species known from the Yukon and Alaska to northern Chile and Argentina. Descriptions of the adults (both sexes) of Pseudochalcura carinata sp. nov. from Argentina, and of the males of P. pauca Heraty and P. prolata Heraty are provided. A revised identification key to species is included.
2016: Zootaxa
Matthew N Herod, Tianjiao Li, André Pellerin, William E Kieser, Ian D Clark
The long lived radioisotope (129)I is a uranium fission product, and an environmental contaminant of the nuclear age. Consequently, it can trace anthropogenic releases of (129)I in watersheds, and has been identified as a potential means to distinguish water sources in discharge (Nimz, 1998). The purpose of this work was to identify the sources and mass input of (129)I and trace the transport, partitioning and mass balance of (129)I over time in a remote watershed. We monitored (129)I and other geochemical and isotope tracers (e...
November 1, 2016: Science of the Total Environment
Jennifer K Cano, Angel M Foster
BACKGROUND: Abortion has been legal without restriction in Canada since 1988 and is recognized as a medically necessary service. However, research indicates that women still face numerous barriers to accessing care, challenges which are amplified for women living in rural, remote, and northern regions in Canada. OBJECTIVES: This qualitative study aimed to document women's experiences seeking and obtaining abortion services while residing in Yukon Territory, identify financial and personal costs, and explore avenues through which services could be improved...
June 29, 2016: Contraception
Alyssa N Weaver, Melynda S Coker, Mathias Steinach, Robert H Coker
No abstract text is available yet for this article.
May 2016: Medicine and Science in Sports and Exercise
B L Langille, R Perry, D Keefe, O Barker, H D Marshall
Two hundred and eighty-seven longnose sucker Catostomus catostomus were collected from 14 lakes in Labrador, 52 from three lakes in Ontario, 43 from two lakes in British Columbia and 32 from a lake in Yukon; a total of 414 in all. The resulting 34 haplotypes (20 in Labrador) contained moderate haplotypic diversity (h = 0·657) and relatively low nucleotide diversity (π = 3·730 × 10(-3) . Mean ϕST (0·453, P < 0·05) over all populations revealed distinct genetic structuring among C. catostomus populations across Canada, based on province, which was validated by the analysis and spatial analysis of molecular variance (c...
August 2016: Journal of Fish Biology
Kate L Bassil, Junmin Yang, Laura Arbour, Rahim Moineddin, Mary E Brindle, Emily Hazell, Erik D Skarsgard
OBJECTIVES: Gastroschisis is a serious birth defect of the abdominal wall that is associated with mortality and significant morbidity. Our understanding of the factors causing this defect is limited. The objective of this paper is to describe the geographic variation in incidence of gastroschisis and characterize the spatial pattern of all gastroschisis cases in Canada between 2006 and 2011. Specifically, we aimed to ascertain the differences in spatial patterns between geographic regions and identify significant clusters and their location...
2016: Canadian Journal of Public Health. Revue Canadienne de Santé Publique
Zijian Sim, Jocelyn C Hall, Bill Jex, Troy M Hegel, David W Coltman
Past glaciation events have played a major role in shaping the genetic diversity and distribution of wild sheep in North America. The advancement of glaciers can isolate populations in ice-free refugia, where they can survive until the recession of ice sheets. The major Beringian refugium is thought to have held thinhorn sheep (Ovis dalli) populations during times of glacial advance. While isolation in the major refugium can account for much of the genetic and morphological diversity seen in extant thinhorn sheep populations, mounting evidence suggests the persistence of populations in smaller minor refugia...
August 2016: Molecular Ecology
Keyvan Dastmalchi, Isabel Wang, Ruth E Stark
The need for safe, effective preservatives is a prominent issue in the food and drug industries, reflecting demand for natural alternatives to synthetic chemicals viewed as harmful to consumers and the environment. Thus, this study determined the identities and scavenging capacities of antioxidant metabolites produced as a response to potato tuber wounding, using activity-guided fractionation of polar extracts from a Yukon Gold cultivar that had previously exhibited exceptionally high radical-scavenging activity...
November 1, 2016: Food Chemistry
Angela W Chan, Julie Hopkins, Isabelle Gagnon, Daniel W Birch
BACKGROUND: Bariatric surgery is typically offered in larger health care centers, forcing patients to travel long distances to access care. An adult obesity program was established in Whitehorse, Yukon based on the multidisciplinary adult bariatric clinic in Edmonton, to alleviate long-distance care difficulties. This study analyzes patient/health care staff satisfaction and surgical outcomes for this program. METHODS: A survey was administered to patients and health care staff at Edmonton and Whitehorse...
May 2016: American Journal of Surgery
Susan K Raatz, Laura Idso, LuAnn K Johnson, Matthew I Jackson, Gerald F Combs
Resistant starch (RS) has unique digestive and absorptive properties which may provide health benefits. We conducted a study to determine the contributions of cultivar, cooking method and service temperature on the RS contents of potatoes (Solanum tuberosum L.). We hypothesized that the RS content would vary by variety, cooking method and service temperature. Potatoes of three common commercial varieties (Yukon Gold, Dark Red Norland, and Russet Burbank) were subjected to two methods of cooking (baking or boiling) and three service temperatures: hot (65°C), chilled (4°C) and reheated (4°C for 6d; reheated to 65°C) and analyzed the starch content by modification of a commercially available assay...
October 1, 2016: Food Chemistry
Annie-Claude Bourgeois, Tammy Zulz, Bolette Soborg, Anders Koch
BACKGROUND: Tuberculosis is highly prevalent in many Arctic areas. Members of the International Circumpolar Surveillance Tuberculosis (ICS-TB) Working Group collaborate to increase knowledge about tuberculosis in Arctic regions. OBJECTIVE: To establish baseline knowledge of tuberculosis surveillance systems used by ICS-TB member jurisdictions. DESIGN: Three questionnaires were developed to reflect the different surveillance levels (local, regional and national); all 3 were forwarded to the official representative of each of the 15 ICS-TB member jurisdictions in 2013...
2016: International Journal of Circumpolar Health
Pierre B Boucher, Danica Brousseau, Sarah Chahine
The objective of this jurisdictional review is to provide summary information pertaining to the regulation of chiropractors in Canadian provinces and territories on the topic of informed consent. Our review shows that two provinces have legislated for all healthcare professions: Ontario and Prince Edward Island. Two chiropractic regulatory bodies (New Brunswick and, Newfoundland and Labrador) have adopted the Canadian Chiropractic Association Code of Conduct. All chiropractic regulatory bodies of the other provinces and Yukon have adopted their own specific dispositions regarding informed consent...
March 2016: Journal of the Canadian Chiropractic Association
Andrew M Ramey, John M Pearce, Andrew B Reeves, Rebecca L Poulson, Jennifer Dobson, Brian Lefferts, Kyle Spragens, David E Stallknecht
BACKGROUND: Eurasian-origin and intercontinental reassortant highly pathogenic (HP) influenza A viruses (IAVs) were first detected in North America in wild, captive, and domestic birds during November-December 2014. Detections of HP viruses in wild birds in the contiguous United States and southern Canadian provinces continued into winter and spring of 2015 raising concerns that migratory birds could potentially disperse viruses to more northerly breeding areas where they could be maintained to eventually seed future poultry outbreaks...
March 31, 2016: Virology Journal
Joseph Domagalski, Michael S Majewski, Charles N Alpers, Chris S Eckley, Collin A Eagles-Smith, Liam Schenk, Susan Wherry
Annual stream loads of mercury (Hg) and inputs of wet and dry atmospheric Hg deposition to the landscape were investigated in watersheds of the Western United States and the Canadian-Alaskan Arctic. Mercury concentration and discharge data from flow gauging stations were used to compute annual mass loads with regression models. Measured wet and modeled dry deposition were compared to annual stream loads to compute ratios of Hg stream load to total Hg atmospheric deposition. Watershed land uses or cover included mining, undeveloped, urbanized, and mixed...
October 15, 2016: Science of the Total Environment
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