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https://www.readbyqxmd.com/read/28549168/assessing-the-thermal-dissipation-sap-flux-density-method-for-monitoring-cold-season-water-transport-in-seasonally-snow-covered-forests
#1
Allison M Chan, David R Bowling
Productivity of conifers in seasonally snow-covered forests is high before and during snowmelt when environmental conditions are optimal for photosynthesis. Climate change is altering the timing of spring in many locations, and changes in the date of transition from winter dormancy can have large impacts on annual productivity. Sap flow methods provide a promising approach to monitor tree activity during the cold season and the winter-spring and fall-winter transitions. Although sap flow techniques have been widely used, cold season results are generally not reported...
May 26, 2017: Tree Physiology
https://www.readbyqxmd.com/read/28549029/a-contemporary-approach-to-reoperative-aortic-valve-surgery-when-is-less-more
#2
Deane E Smith, Michael S Koeckert, Patrick F Vining, Elias A Zias, Eugene A Grossi, Aubrey C Galloway
OBJECTIVE: Although the benefits of minimally invasive valvular surgery are well established, the applicability of extending these techniques to reoperative aortic valve surgery is unknown. We evaluated our experience with a minimally invasive approach to this patient population. METHODS: From January 2010 to September 2015, 21 patients underwent reoperative isolated aortic valve replacement via a minimally invasive approach by a single surgeon. All patients had preoperative evaluation with computerized tomography and coronary catheterization...
May 25, 2017: Innovations: Technology and Techniques in Cardiothoracic and Vascular Surgery
https://www.readbyqxmd.com/read/28549011/use-of-elderly-donors-in-liver-transplantation-a-paired-match-analysis-at-a-single-center
#3
Davide Ghinolfi, Quirino Lai, Daniele Pezzati, Paolo De Simone, Erion Rreka, Franco Filipponi
OBJECTIVE: To evaluate the use of elderly donors in liver transplantation (LT) and identify risk factors associated with a worse outcome. SUMMARY BACKGROUND DATA: Use of livers from very old donors could expand the donor pool but is not universally implemented. METHODS: This is a retrospective, single-center medical record review. From January 2001 to December 2014, 1354 LTs were performed. After exclusion of donors <18 years, ABO-incompatible LT, re-LT and UNOS 1 status patients, LT recipients were stratified into 2 groups based on donor age: 18-69 (n=692) vs...
May 25, 2017: Annals of Surgery
https://www.readbyqxmd.com/read/28548818/pla-pbat-bionanocomposites-with-antimicrobial-natural-rosin-for-green-packaging
#4
Hesham Moustafa, Nadia El Kissi, Ahmed I Abou-Kandil, Mohamed S Abdel-Aziz, Alain Dufresne
The use of biodegradable polymers is of great importance nowadays in many applications. Some of the most commonly used biopolymers are polylactic acid (PLA) and poly(butylene adipate-co-terephthalate) (PBAT) due to their superior properties and availability. In this manuscript, we use a facile and green modification method of organoclay (OC) by antimicrobial natural rosin which is considered as a toxicity-free reinforcing material, thus keeping the green character of the material. It increases the interlayer spacing between the clay platelets...
May 26, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28548656/nlr-locus-mediated-trade-off-between-abiotic-and-biotic-stress-adaptation-in-arabidopsis
#5
Hirotaka Ariga, Taku Katori, Takashi Tsuchimatsu, Taishi Hirase, Yuri Tajima, Jane E Parker, Rubén Alcázar, Maarten Koornneef, Owen Hoekenga, Alexander E Lipka, Michael A Gore, Hitoshi Sakakibara, Mikiko Kojima, Yuriko Kobayashi, Satoshi Iuchi, Masatomo Kobayashi, Kazuo Shinozaki, Yoichi Sakata, Takahisa Hayashi, Yusuke Saijo, Teruaki Taji
Osmotic stress caused by drought, salt or cold decreases plant fitness. Acquired stress tolerance defines the ability of plants to withstand stress following an initial exposure(1). We found previously that acquired osmotolerance after salt stress is widespread among Arabidopsis thaliana accessions(2). Here, we identify ACQOS as the locus responsible for ACQUIRED OSMOTOLERANCE. Of its five haplotypes, only plants carrying group 1 ACQOS are impaired in acquired osmotolerance. ACQOS is identical to VICTR, encoding a nucleotide-binding leucine-rich repeat (NLR) protein(3)...
May 26, 2017: Nature Plants
https://www.readbyqxmd.com/read/28548624/changes-in-attachment-organization-emotion-dysregulation-and-interpersonal-problems-among-women-in-treatment-for-abuse
#6
Leah Keating, Robert T Muller, Catherine C Classen
OBJECTIVE: Women who have experienced childhood abuse often have interpersonal difficulties. The current study examines whether changes in emotion dysregulation mediate the relationship between changes in attachment patterns and changes in interpersonal problems among women who completed treatment for the sequelae of childhood abuse. METHOD: Participants were 36 women who completed a program targeting the psychological consequences of childhood maltreatment. At pre-and posttreatment, participants completed a projective assessment of adult attachment, and self-report measures of emotion dysregulation and interpersonal problems...
May 26, 2017: Journal of Trauma & Dissociation
https://www.readbyqxmd.com/read/28548476/is-cold-blood-cardioplegia-absolutely-superior-to-cold-crystalloid-cardioplegia-in-aortic-valve-surgery
#7
Daniel A Lerman, Matilde Otero-Losada, Kiddy Ume, Pablo A Salgado, Sai Prasad, Kelvin Lim, Bruno Péault, Nasri Alotti
BACKGROUND: Experimental evidence suggests that blood cardioplegia (BCP) may be superior to cold crystalloid cardioplegia (CCP) for myocardial protection. However, robust clinical data are lacking. We compared post-operative outcome of patients undergoing aortic valve replacement (AVR) using cold anterograde-retrograde intermittent BCP versus anterograde (CCP). METHODS: Adult consecutive isolated AVR performed between April 2006 and February 2011 at the Royal Infirmary Hospital of Edinburgh were retrospectively analyzed...
May 26, 2017: Journal of Cardiovascular Surgery
https://www.readbyqxmd.com/read/28548241/-making-better-use-of-u-s-women-psychology-sex-roles-and-womanpower-in-post-wwii-america
#8
Alexandra Rutherford
The relationship between American psychology and gender ideologies in the two decades following World War II was complicated and multivalent. Although many psy-professionals publicly contributed to the cult of domesticity that valorized women's roles as wives and mothers, other psychologists, many of them women, reimagined traditional sex roles to accommodate and deproblematize the increasing numbers of women at work, especially working mothers. In this article, I excavate and highlight the contributions of several of these psychologists, embedding their efforts in the context of the paradoxical expectations for women that colored the postwar and increasingly Cold War landscape of the United States...
May 26, 2017: Journal of the History of the Behavioral Sciences
https://www.readbyqxmd.com/read/28548173/effects-of-freeze-thawing-cycles-on-desorption-behaviors-of-pah-contaminated-soil-in-the-presence-of-a-biosurfactant-a-case-study-in-western-canada
#9
Y Yao, G H Huang, C J An, G H Cheng, J Wei
Many regions in Canada are facing increasing environmental threats posed by oil and gas exploitation and transportation. These contaminated lands are inevitably subjected to seasonal and diurnal freeze-thawing cycles (FTCs). However, knowledge about the effect of FTCs on the behaviours of hydrophobic contaminants during the aging process of soil is limited. This study investigated the desorption characteristics of phenanthrene in aging soils in the presence of the biosurfactant rhamnolipid under diurnal and seasonal FTC treatments...
May 26, 2017: Environmental Science. Processes & Impacts
https://www.readbyqxmd.com/read/28546833/energy-down-converting-organic-fluorophore-functionalized-mesoporous-silica-hybrids-for-monolith-coated-light-emitting-diodes
#10
Markus Börgardts, Thomas J J Müller
The covalent attachment of organic fluorophores in mesoporous silica matrices for usage as energy down converting phosphors without employing inorganic transition or rare earth metals is reported in this article. Triethoxysilylpropyl-substituted derivatives of the blue emitting perylene, green emitting benzofurazane, and red emitting Nile red were synthesized and applied in the synthesis of mesoporous hybrid materials by postsynthetic grafting to commercially available MCM-41. These individually dye-functionalized hybrid materials are mixed in variable ratios to furnish a powder capable of emitting white light with CIE chromaticity coordinates of x = 0...
2017: Beilstein Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28546467/post-exercise-cold-water-immersion-modulates-skeletal-muscle-pgc-1%C3%AE-mrna-expression-in-immersed-and-non-immersed-limbs-evidence-of-systemic-regulation
#11
Robert Allan, Adam Philip Sharples, Graeme L Close, Barry Drust, Sam O Shepherd, John Dutton, James P Morton, Warren Gregson
Mechanisms mediating post-exercise cold-induced increases in PGC-1α gene expression in human skeletal muscle are yet to be fully elucidated, but may involve local cooling effects on AMPK and p38 MAPK related signalling and/or increased systemic β-adrenergic stimulation. We aimed to therefore examine whether post-exercise cold-water immersion enhancement of PGC-1α mRNA is mediated through local or systemic mechanisms. Ten subjects completed acute cycling (8x5 min at ~80% peak power output) followed by seated-rest (CON) or single-leg cold-water immersion (CWI; 10 min, 8°C)...
May 25, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28546316/satellites-reveal-contrasting-responses-of-regional-climate-to-the-widespread-greening-of-earth
#12
Giovanni Forzieri, Ramdane Alkama, Diego G Miralles, Alessandro Cescatti
Changes in vegetation cover associated to the observed greening may affect several biophysical processes, whose net effects on climate are unclear. Here, we analyze remotely sensed dynamics in leaf area index (LAI) and energy fluxes to explore the associated variation in local climate. We show that the increasing trend in LAI contributed to the warming of boreal zones through a reduction of surface albedo, and to an evaporation-driven cooling in arid regions. The interplay between LAI and surface biophysics is amplified up to five times under extreme warm-dry and cold-wet years...
May 25, 2017: Science
https://www.readbyqxmd.com/read/28545666/mahuannin-b-an-adenylate-cyclase-inhibitor-attenuates-hyperhidrosis-via-suppressing-%C3%AE-2-adrenoceptor-camp-signaling-pathway
#13
Zengyong Wang, Yu Cui, Guoyu Ding, Mengge Zhou, Xiaoyao Ma, Yuanyuan Hou, Min Jiang, Dailin Liu, Gang Bai
BACKGROUND: Based on the traditional application of traditional Chinese Medicines (TCMs), Ephedra Herba (EH) is used to cure cold fever by inducing sweating, whereas Ephedra Radix (ER) is used to treat hyperhidrosis. Although they come from the same plant, Ephedra sinica Stapf, but have play opposing roles in clinical applications. EH is known to contain ephedrine alkaloids, which is the driver of the physiological changes in sweating, heart rate and blood pressure. However, the active pharmacological ingredients (APIs) of ER and the mechanisms by which it restricts sweating remain unknown...
July 1, 2017: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/28545111/northern-range-expansion-of-the-asian-tiger-mosquito-aedes-albopictus-analysis-of-mosquito-data-from-connecticut-usa
#14
Philip M Armstrong, Theodore G Andreadis, John J Shepard, Michael C Thomas
BACKGROUND: The Asian tiger mosquito (Aedes albopictus) is an invasive species and important arbovirus vector that was introduced into the U.S. in the 1980's where it continues to expand its range. Winter temperature is an important constraint to its northward expansion, with potential range limits located between the 0° and -5°C mean cold month isotherm. Connecticut is located within this climatic zone and therefore, Ae. albopictus was monitored statewide to assess its northern range expansion and to delineate where populations can stably persist...
May 18, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28543616/experimental-soil-warming-shifts-the-fungal-community-composition-at-the-alpine-treeline
#15
Emily F Solly, Björn D Lindahl, Melissa A Dawes, Martina Peter, Rômulo C Souza, Christian Rixen, Frank Hagedorn
Increased CO2 emissions and global warming may alter the composition of fungal communities through the removal of temperature limitation in the plant-soil system, faster nitrogen (N) cycling and changes in the carbon (C) allocation of host plants to the rhizosphere. At a Swiss treeline featuring Larix decidua and Pinus uncinata, the effects of multiple years of CO2 enrichment and experimental soil warming on the fungal community composition in the organic horizons were analysed using 454-pyrosequencing of ITS2 amplicons...
May 22, 2017: New Phytologist
https://www.readbyqxmd.com/read/28542868/initial-placement-and-secondary-displacement-of-a-new-suture-method-catheter-for-sciatic-nerve-block-in-healthy-volunteers-a-randomised-double-blind-pilot-study
#16
T S Lyngeraa, C Rothe, C Steen-Hansen, M H Madsen, C B Christiansen, A M Andreasen, L H Lundstrøm, K H W Lange
We performed a randomised double-blind pilot study in 16 healthy volunteers to investigate the success rate for placing a new suture-method catheter for sciatic nerve block. A catheter was inserted into both legs of volunteers and each was randomly allocated to receive 15 ml lidocaine 2% through the catheter in one leg and 15 ml saline in the other leg. Successful placement of the catheter was defined as a 20% decrease in maximum voluntary isometric contraction for dorsiflexion of the ankle. Secondary outcomes were maximum voluntary isometric contraction for plantar flexion at the ankle, surface electromyography and cold sensation...
May 25, 2017: Anaesthesia
https://www.readbyqxmd.com/read/28542832/integrated-transcriptomic-and-metabolomic-analysis-reveals-adaptive-changes-of-hibernating-retinas
#17
Yizhao Luan, Jingxing Ou, Vincent P Kunze, Fengyu Qiao, Yan Wang, Lai Wei, Wei Li, Zhi Xie
Hibernation is a seasonally adaptive strategy that allows hibernators to live through extremely cold conditions. Despite the profound reduction of blood flow to the retinas, hibernation causes no lasting retinal injury. Instead, hibernators show an increased tolerance to ischemic insults during the hibernation period. To understand the molecular changes of the retinas in response to hibernation, we applied an integrative transcriptome and metabolome analysis to explore changes in gene expression and metabolites of 13-lined ground squirrel retinas during hibernation...
May 25, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28542270/prevalence-of-cough-throughout-childhood-a-cohort-study
#18
Maja Jurca, Alban Ramette, Cristian M Dogaru, Myrofora Goutaki, Ben D Spycher, Philipp Latzin, Erol A Gaillard, Claudia E Kuehni
BACKGROUND: Cough in children is a common reason for medical consultations and affects quality of life. There are little population-based data on the epidemiology of recurrent cough in children and how this varies by age and sex, or between children with and without wheeze. We determined the prevalence of cough throughout childhood, comparing several standardised cough questions. We did this for the entire population and separately for girls and boys, and for children with and without wheeze...
2017: PloS One
https://www.readbyqxmd.com/read/28542219/late-neolithic-phytolith-and-charcoal-records-of-human-activities-and-vegetation-change-in-shijiahe-culture-tanjialing-site-china
#19
Xiao Hong Zhu, Bing Li, Chun Mei Ma, Cheng Zhu, Li Wu, Hui Liu
There is significant archaeological evidence marking the collapse of the Shijiahe culture in the middle reaches of the Yangtze River in China during the late Neolithic Period. However, the causes for this cultural collapse remain unclear. Our sedimentary records from a 3.3 m long profile and 76 phytolith and charcoal samples from the Tanjialing archaeological sites provide records of interactions between an ancient culture and vegetation change. During the early Shijiahe culture (c, 4850-4400 cal BP), the climate was warm and humid...
2017: PloS One
https://www.readbyqxmd.com/read/28542212/proteome-dynamics-of-cold-acclimating-rhododendron-species-contrasting-in-their-freezing-tolerance-and-thermonasty-behavior
#20
Jose V Die, Rajeev Arora, Lisa J Rowland
To gain a better understanding of cold acclimation in rhododendron and in woody perennials in general, we used the 2D-DIGE technique to analyze the rhododendron proteome during the seasonal development of freezing tolerance. We selected two species varying in their cold acclimation ability as well as their thermonasty response (folding of leaves in response to low temperature). Proteins were extracted from leaves of non-acclimated (NA) and cold acclimated (CA) plants of the hardier thermonastic species, R. catawbiense (Cata...
2017: PloS One
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