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https://www.readbyqxmd.com/read/28220727/effects-of-cold-storage-on-the-biological-characteristics-of-microplitis-prodeniae-hymenoptera-braconidae
#1
Z Yan, J J Yue, C Bai, Z Q Peng, C H Zhang
The endoparasitoid Microplitis prodeniae Rao and Chandry is an important potential augmentative biological control agent for lepidopteran pests of vegetables and tobacco. However, cold storage of pupae is required to ensure that sufficient parasitoids are available when they are needed in the field. In this study, pupae were maintained at 0, 4 or 10°C for 5-50 days after which the adults were evaluated for emergence, pre-emergence period, sex ratio, female longevity, oviposition period, and fecundity. Cold storage did not affect the pre-emergence period or proportion of females; however, there was a significant reduction in emergence, female longevity, oviposition period, and fecundity with increased exposure to cold...
February 21, 2017: Bulletin of Entomological Research
https://www.readbyqxmd.com/read/28217005/chromatin-based-epigenetic-regulation-of-plant-abiotic-stress-response
#2
Garima Pandey, Namisha Sharma, Pranav Pankaj Sahu, Manoj Prasad
Plants are continuously exposed to various abiotic and biotic factors limiting their growth and reproduction. In response, they need various sophisticated ways to adapt to adverse environmental conditions without compromising their proper development, reproductive success and eventually survival. This requires an intricate network to regulate gene expression at transcriptional and post-transcriptional levels, including epigenetic switches. Changes in chromatin modifications such as DNA and histone methylation have been observed in plants upon exposure to several abiotic stresses...
December 2016: Current Genomics
https://www.readbyqxmd.com/read/28216727/high-altitude-dermatology
#3
Lt Col G K Singh
Approximately, 140 million people worldwide live permanently at high altitudes (HAs) and approximately another 40 million people travel to HA area (HAA) every year for reasons of occupation, sports or recreation. In India, whole of Ladakh region, part of Northwest Kashmir, Northern part of Sikkim and Tenga valley of Arunachal are considered inhabited areas of HAA. The low quantity of oxygen, high exposure of ultraviolet (UV) light, very low humidity, extreme subzero temperature in winter, high wind velocity, make this region difficult for lowlanders as well as for tourists...
January 2017: Indian Journal of Dermatology
https://www.readbyqxmd.com/read/28214881/attenuation-of-low-ambient-temperature-induced-myocardial-hypertrophy-by-atorvastatin-via-promoting-bcl-2-expression
#4
Jing Liang, Kun Yin, Xuefeng Cao, Zhenbo Han, Qi Huang, Lai Zhang, Wenya Ma, Fengzhi Ding, Chongwei Bi, Dan Feng, Zhenwei Pan, Yu Liu
BACKGROUND/AIMS: It is well documented that myocardial hypertrophy is associated with low ambient temperature. Atorvastatin (Atv) has been shown to protect against atherosclerosis, cardiac fibrosis, ischemia/reperfusion injury, etc. In this study, we aim to determine whether atorvastatin is effective in the treatment of myocardial hypertrophy induced by cold exposure and to shed light on underlying mechanism. METHODS: The mice aged 4-week were randomized to Control (Ctl) group (raised at room temperature), Cold group (raised at 3-5ºC) and Atv treatment group (raised at 3-5ºC followed by 10mg/kg/day Atv infusion)...
January 24, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28214695/the-effects-of-atmospheric-pressure-cold-plasma-treatment-on-microbiological-physical-chemical-and-sensory-characteristics-of-vacuum-packaged-beef-loin
#5
A Bauer, Y Ni, S Bauer, P Paulsen, M Modic, J L Walsh, F J M Smulders
Effects on vacuum packaged and non-packaged beef longissimus samples exposed to atmospheric cold plasma (ACP) generated at different powers were studied over a 10day period of vacuum-, and a subsequent 3day period of aerobic storage. Exposure of non-covered beef samples under high power ACP conditions resulted in increased a*, b*, Chroma and Hue values, but ACP treatment of packaged loins did not impact colour (L*, a*, b*, Chroma, Hue), lipid peroxidation, sarcoplasmic protein denaturation, nitrate/nitrite uptake, or myoglobin isoform distribution...
February 8, 2017: Meat Science
https://www.readbyqxmd.com/read/28212894/exogenous-thyroid-hormones-regulate-the-activity-of-citrate-synthase-and-cytochrome-c-oxidase-in-warm-but-not-cold-acclimated-lake-whitefish-coregonus-clupeaformis
#6
Megan A Zak, Amy M Regish, Stephen D McCormick, Richard G Manzon
Thermal acclimation is known to elicit metabolic adjustments in ectotherms, but the cellular mechanisms and endocrine control of these shifts have not been fully elucidated. Here we examined the relationship between thermal acclimation, thyroid hormones and oxidative metabolism in juvenile lake whitefish. Impacts of thermal acclimation above (19 °C) or below (8 °C) the thermal optimum (13 °C) and exposure to exogenous thyroid hormone (60 µg T4/g body weight) were assessed by quantifying citrate synthase and cytochrome c oxidase activities in liver, red muscle, white muscle and heart...
February 14, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28204886/environmental-and-biological-determination-of-acrolein-using-new-cold-fiber-solid-phase-microextraction-with-gas-chromatography-mass-spectrometry
#7
Cláudia M Dias, Helvécio C Menezes, Zenilda L Cardeal
Acrolein is a pollutant released daily to the indoor environment from different sources. The present study reports the development of a simple and sensitive cold fiber solid phase microextraction sampling method for the determination of acrolein in exhaled air and indoor air by gas chromatography mass spectrometry. O-(2,3,4,5,6-pentafluorobenzyl) hydroxylamine was used as derivatizing agent supported on a 65-μm polydimethylsiloxane-divinylbenzene SPME fiber. An acrolein permeation tube at 326.25 ng min(-1) rate was used to generate gaseous standards...
February 15, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28195002/coverage-of-tendon-exposure-after-radial-forearm-free-flap-by-the-dorsoulnar-artery-perforator-flap
#8
Rémi Foissac, Marc Benatar, Olivier Dassonville, Alexandre Bozec, Gilles Poissonnet, Olivier Camuzard
Objective This study was designed to assess the effectiveness of an alternative technique using a perforator flap to manage secondary tendon exposure after a radial forearm free flap in head and neck oncologic surgery. Study Design Prospective cohort study. Setting Plastic Reconstructive Surgery Unit, Nice University Hospital, Pasteur 2 Hospital, France. Subjects and Methods Despite its numerous advantages, the radial forearm free flap is associated with significant donor site morbidity and the risk of secondary tendon exposure...
February 1, 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28188872/pre-transplantation-31-p-magnetic-resonance-spectroscopy-for-quality-assessment-of-human-pancreatic-grafts-a-feasibility-study
#9
Lina Carlbom, Jan Weis, Lars Johansson, Olle Korsgren, Håkan Ahlström
OBJECTIVE: To investigate the feasibility of using (31)P-MRS for objective non-invasive quality assessment of human pancreas grafts prior to transplantation or islet isolation. MATERIALS AND METHODS: Pancreata from 5 human donors, 3 males and 2 females, aged 49-78years, with body mass index (BMI) 22-31kg/m(2), were included. Pancreata were perfused with histidine-tryptophan-ketoglutarate solution during procurement and stored in hypothermic condition (4°C) for 21-44h...
February 8, 2017: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/28188725/physiological-correlates-of-chill-susceptibility-in-lepidoptera
#10
Mads Kuhlmann Andersen, Signe Overgaard Jensen, Johannes Overgaard
The majority of insects enter a state of reversible coma if temperature is lowered sufficiently. If the cold treatment is not to severe these insects recover gradually when returned to benign temperatures in a time-dependent manner that often depends on the duration and intensity of the cold exposure. Previous studies have associated these phenotypes to changes in membrane potential (Vm) and ion balance, and especially hemolymph [K(+)] is known to be of importance for the recovery time. In the present study we examined this link in three species of Lepidoptera as insects from this order are known to possess resting hemolymph [K(+)] that would severely compromise Vm in other insects...
February 7, 2017: Journal of Insect Physiology
https://www.readbyqxmd.com/read/28187945/impact-of-ambient-temperature-on-morbidity-and-mortality-an-overview-of-reviews
#11
Xuping Song, Shigong Wang, Yuling Hu, Man Yue, Tingting Zhang, Yu Liu, Jinhui Tian, Kezheng Shang
The objectives were (i) to conduct an overview of systematic reviews to summarize evidence from and evaluate the methodological quality of systematic reviews assessing the impact of ambient temperature on morbidity and mortality; and (ii) to reanalyse meta-analyses of cold-induced cardiovascular morbidity in different age groups. The registration number is PROSPERO-CRD42016047179. PubMed, Embase, the Cochrane Library, Web of Science, the Cumulative Index to Nursing and Allied Health Literature (CINAHL), and Global Health were systematically searched to identify systematic reviews...
February 7, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28186086/hoxc10-suppresses-browning-of-white-adipose-tissues
#12
Yvonne Ng, Shi-Xiong Tan, Sook Yoong Chia, Hwee Yim Angeline Tan, Sin Yee Gun, Lei Sun, Wanjin Hong, Weiping Han
Given that increased thermogenesis in white adipose tissue, also known as browning, promotes energy expenditure, significant efforts have been invested to determine the molecular factors involved in this process. Here we show that HOXC10, a homeobox domain-containing transcription factor expressed in subcutaneous white adipose tissue, is a suppressor of genes involved in browning white adipose tissue. Ectopic expression of HOXC10 in adipocytes suppresses brown fat genes, whereas the depletion of HOXC10 in adipocytes and myoblasts increases the expression of brown fat genes...
February 10, 2017: Experimental & Molecular Medicine
https://www.readbyqxmd.com/read/28178991/an-ethnographic-study-of-salt-use-and-humoral-concepts-in-a-latino-farm-worker-community-in-california-s-central-valley
#13
Judith C Barker, Claudia Guerra, M Judy Gonzalez-Vargas, Kristin S Hoeft
BACKGROUND: This article reports on the use of domestic or table salt for its perceived health effects and healing properties in a Latino farmworker community. It explores how contemporary salt usage beliefs can be seen to have roots in long-standing humoral theories of medicine and health. METHODS: This qualitative investigation comprised 30 in-depth individual interviews and five focus groups conducted in Spanish with Mexican and Central American immigrants in one small city in California's Central Valley (N = 61 total participants)...
February 8, 2017: Journal of Ethnobiology and Ethnomedicine
https://www.readbyqxmd.com/read/28178573/enhancement-of-cold-and-salt-tolerance-of-arabidopsis-by-transgenic-expression-of-the-s-adenosylmethionine-decarboxylase-gene-from-leymus-chinensis
#14
Zhujiang Liu, Panpan Liu, Dongmei Qi, Xianjun Peng, Gongshe Liu
Leymus chinensis is an important perennial forage grass natively distributed in the Eurasian Steppe. However, little is known about the molecular mechanism of its adaptation to extreme environmental conditions. Based on L. chinensis cold-treated sequence database, a highly expressed S-adenosylmethionine decarboxylase gene (LcSAMDC1) was isolated from L. chinensis. Gene structure analysis showed that LcSAMDC1 has two introns and three exons as well as three non-overlapping ORFs in its mRNA sequence. One hour of cold exposure caused a significant up-regulation of LcSAMDC1, while abscisic acid (ABA), salt, and osmotic stresses slightly induced its expression...
January 19, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28177744/impact-of-hot-and-cold-exposure-on-human-skeletal-muscle-gene-expression
#15
Roksana B Zak, Robert J Shute, Matthew W S Heesch, D Taylor La Salle, Matthew P Bubak, Nicholas E Dinan, Terence L Laursen, Dustin Russel Slivka
: Many human diseases lead to a loss of skeletal muscle metabolic function and mass. Local and environmental temperature can modulate the exercise-stimulated response of several genes involved in mitochondrial biogenesis and skeletal muscle function in a human model. However, the impact of environmental temperature, independent of exercise, has not been addressed in a human model. Thus, the purpose of this study was to compare the effects of exposure to hot, cold, and room temperature conditions on skeletal muscle gene expression related to mitochondrial biogenesis and muscle mass...
December 1, 2016: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28168096/transcriptomic-response-of-maize-primary-roots-to-low-temperatures-at-seedling-emergence
#16
Mauro Di Fenza, Bridget Hogg, Jim Grant, Susanne Barth
BACKGROUND: Maize (Zea mays) is a C4 tropical cereal and its adaptation to temperate climates can be problematic due to low soil temperatures at early stages of establishment. METHODS: In the current study we have firstly investigated the physiological response of twelve maize varieties, from a chilling condition adapted gene pool, to sub-optimal growth temperature during seedling emergence. To identify transcriptomic markers of cold tolerance in already adapted maize genotypes, temperature conditions were set below the optimal growth range in both control and low temperature groups...
2017: PeerJ
https://www.readbyqxmd.com/read/28166943/cold-adaptive-thermogenesis-following-consumption-of-certain-pungent-spice-principles-a-validation-study
#17
Chaitanya Pandit, K R Anilakumar
Identifying a means to activate or potentiate thermogenic mechanisms through ingestion of dietary compounds have important implications in cold endurance and survival. Although many reports discuss the thermogenic potential of spices, it is surprising that none of the studies verify whether consumption of spices can improve cold endurance. In this study, we have attempted to evaluate if ingestion of certain spices can activate heat-generating mechanisms in the body such that a fall in. core body temperature (CBT) can be delayed or prevented when faced with a cold challenge...
February 2017: Journal of Thermal Biology
https://www.readbyqxmd.com/read/28165406/examining-the-effects-of-ambient-temperature-on-pre-term-birth-in-central-australia
#18
Supriya Mathew, Deepika Mathur, Anne B Chang, Elizabeth McDonald, Gurmeet R Singh, Darfiana Nur, Rolf Gerritsen
Preterm birth (born before 37 completed weeks of gestation) is one of the leading causes of death among children under 5 years of age. Several recent studies have examined the association between extreme temperature and preterm births, but there have been almost no such studies in arid Australia. In this paper, we explore the potential association between exposures to extreme temperatures during the last 3 weeks of pregnancy in a Central Australian town. An immediate effect of temperature exposure is observed with an increased relative risk of 1%-2% when the maximum temperature exceeded the 90th percentile of the summer season maximum temperature data...
February 4, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28161488/cold-atmospheric-pressure-plasma-elimination-of-clinically-important-single-and-mixed-species-biofilms
#19
Martina Modic, Neil P McLeod, J Mark Sutton, James L Walsh
Mixed-species biofilms reflect the natural environment of many pathogens in clinical settings and are highly resistant to disinfection methods. An indirect cold atmospheric-pressure air-plasma system was evaluated under two different discharge conditions for its ability to kill representative Gram-positive (Staphylococcus aureus) and Gram-negative (Pseudomonas aeruginosa) pathogens. Plasma treatment of individual 24-h-old biofilms and mixed-species biofilms that contained additional species (Enterococcus faecalis and Klebsiella pneumoniae) was considered...
February 1, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28160059/finger-cold-induced-vasodilation-of-older-korean-female-divers-haenyeo-effects-of-chronic-cold-exposure-and-aging
#20
Joo-Young Lee, Joonhee Park, Eunsook Koh, Seongwon Cha
The aim of the present study was to evaluate the local cold tolerance of older Korean female divers, haenyeo (N = 22) in terms of cold acclimatization and ageing. As control groups, older non-diving females (N = 25) and young females from a rural area (N = 15) and an urban area (N = 51) participated in this study. To evaluate local cold tolerance, finger cold-induced vasodilation (CIVD) during finger immersion of 4 °C water was examined. As a result, older haenyeos showed greater minimum finger temperature and recovery finger temperature than older non-diving females (P < 0...
February 3, 2017: International Journal of Biometeorology
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