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https://www.readbyqxmd.com/read/27923182/sociodemographic-lifestyle-and-psychosocial-determinants-of-hair-cortisol-in-a-south-london-community-sample
#1
Susanne Fischer, Roman Duncko, Stephani L Hatch, Andrew Papadopoulos, Laura Goodwin, Souci Frissa, Matthew Hotopf, Anthony J Cleare
OBJECTIVE: Hypothalamic-pituitary-adrenal (HPA) measures are crucial for research into stress and stress-related disorders. Most HPA measures fluctuate depending on diurnal rhythms and state confounders. Hair cortisol concentrations (HCC) are less susceptible to such fluctuations, but less is known about trait-like confounders. Using a community sample, we tested the relationship between HCC and a range of variables including demographic variables, hair treatment, and medication, as well as psychosocial variables, namely childhood trauma, critical life events, and depressive symptoms...
November 17, 2016: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/27921173/day-to-day-variations-in-the-amplitude-of-the-soil-temperature-cycle-and-impact-on-adult-eclosion-timing-of-the-onion-fly
#2
Kazuhiro Tanaka, Yasuhiko Watari
The onion fly Delia antiqua advances its eclosion timing with decreasing temperature amplitude to compensate for a depth-dependent phase delay of the zeitgeber. To elucidate whether or not naturally occurring day-to-day variations in the amplitude of soil temperature cycle disturb this compensatory response, we monitored daily variations in the temperature amplitude in natural soils and evaluated the impact on adult eclosion timing. Our results indicated that both median and variance of the soil temperature amplitude become smaller as depth increases...
December 5, 2016: International Journal of Biometeorology
https://www.readbyqxmd.com/read/27904154/circadian-rhythm-of-blood-pressure-and-the-renin-angiotensin-system-in-the-kidney
#3
REVIEW
Naro Ohashi, Shinsuke Isobe, Sayaka Ishigaki, Hideo Yasuda
Activation of the intrarenal renin-angiotensin system (RAS) has a critical role in the pathophysiology of the circadian rhythm of blood pressure (BP) and renal injury, independent of circulating RAS. Although it is clear that the circulating RAS has a circadian rhythm, reports of a circadian rhythm in tissue-specific RAS are limited. Clinical studies evaluating intrarenal RAS activity by urinary angiotensinogen (AGT) levels have indicated that urinary AGT levels were equally low during both the daytime and nighttime in individuals without chronic kidney disease (CKD) and that urinary AGT levels were higher during the daytime than at nighttime in patients with CKD...
December 1, 2016: Hypertension Research: Official Journal of the Japanese Society of Hypertension
https://www.readbyqxmd.com/read/27904104/the-effects-of-unilateral-nephrectomy-on-blood-pressure-and-its-circadian-rhythm
#4
Naro Ohashi, Shinsuke Isobe, Sayaka Ishigaki, Takahisa Suzuki, Daisuke Motoyama, Takayuki Sugiyama, Masao Nagata, Akihiko Kato, Seiichiro Ozono, Hideo Yasuda
Objective Hypertension and diurnal blood pressure (BP) variation are widely accepted as risk factors for renal damage. However, the effects of unilateral nephrectomy on BP and its circadian rhythm have not yet been clarified in patients with a compromised renal function, including dialysis patients. Methods We investigated 22 unilateral nephrectomized patients (16 men and 6 women, age: 64.5±14.3 years). The function of the circulating renin-angiotensin system (RAS) (plasma renin activity and plasma angiotensin II) and 24-h ambulatory BP monitoring (ABPM) were evaluated before and after nephrectomy...
2016: Internal Medicine
https://www.readbyqxmd.com/read/27903064/modelling-of-the-distribution-of-biomphalaria-glabrata-and-biomphalaria-straminea-in-the-metropolitan-region-of-recife-pernambuco-brazil
#5
Verônica Santos Barbosa, Ricardo José de Paula Souza E Guimarães, Rodrigo Moraes Loyo, Constança Simões Barbosa
The occurrence of schistosomiasis is directly linked to the presence of its snail intermediate host Biomphalaria spp. Knowledge of geographical distribution, habitats and behaviour of these snails in relation to the climate is essential for guiding measures for disease prevention and control. This study aims to model the distribution of B. glabrata and B. straminea in schistosomiasis non-endemic areas of the metropolitan region of Recife (MRR) based on environmental data and estimates of snail distributions in endemic and neighbouring areas...
November 25, 2016: Geospatial Health
https://www.readbyqxmd.com/read/27899291/dynamic-changes-in-sleep-pattern-during-post-partum-in-normal-pregnancy-in-rat-model
#6
Neelima Sivadas, Arathi Radhakrishnan, B S Aswathy, Velayudhan Mohan Kumar, Kamalesh K Gulia
To develop an animal model for studies on peri-partum sleep disorders, sleep patterns in female Wistar rats during pregnancy, post-partum and after weaning, were assessed and associated adaptive changes in their anxiety were examined. Adult nulliparous female rats, maintained in standard laboratory conditions with ad libitum food and water, were surgically implanted with electroencephalogram and electromyogram electrodes under anaesthesia for objective assessment of sleep-wakefulness (S-W). After post-surgical recovery, three control recordings of S-W were taken for 24h before the animals were kept for mating...
November 26, 2016: Behavioural Brain Research
https://www.readbyqxmd.com/read/27898860/effects-of-collection-time-on-flow-of-chromium-and-dry-matter-and-on-basal-ileal-endogenous-losses-of-amino-acids-in-growing-pigs
#7
B G Kim, Y Liu, H H Stein
The objectives of this experiment were to examine the diurnal patterns of chromium and DM flow at the distal ileum of pigs and to determine the effect of collection time on basal ileal endogenous losses (BEL) of CP and AA. Eight barrows with an initial BW of 34.6kg (SD = 2.1) were individually fitted with a T-cannula in the distal ileum and randomly allotted to a replicated 4× 4 Latin square design with 4 diets and 4 periods in each square. Three diets contained either corn, soybean meal, or distillers dried grains with solubles as the sole source of CP and AA...
October 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27896067/relationship-between-high-frequency-oscillations-and-spikes-in-a-case-of-temporal-lobe-epilepsy
#8
Vishwanath Sagi, M Steven Evans
OBJECTIVE: The aim of this case report was to study the relationship between high-frequency oscillations (HFOs), spikes, and seizures in a patient with temporal lobe epilepsy. INTRODUCTION: During intracranial electroencephalography (EEG), HFOs are thought to be a marker for the seizure onset zone (SOZ). High-frequency oscillations are classified into ripples with frequencies of 70-200 Hz and fast ripples with frequencies of 200-500 Hz. Although HFOs are thought to be a marker for the SOZ, their relationship to spikes has not been studied in detail, especially within the SOZ...
2016: Epilepsy & Behavior Case Reports
https://www.readbyqxmd.com/read/27895208/diurnal-solar-energy-conversion-and-photoprotection-in-rice-canopies
#9
Katherine Georgina Meacham, Xavier Sirault, W Paul Quick, Susanne von Caemmerer, Robert T Furbank
Genetic improvement of photosynthetic performance of cereal crops and increasing the efficiency with which solar radiation is converted into biomass has recently become a major focus for crop physiologists and breeders. The pulse amplitude modulated chlorophyll fluorescence technique (PAM) allows quantitative leaf level monitoring of the utilization of energy for photochemical light conversion and photo-protection in natural environments, potentially over the entire crop lifecycle. Here the diurnal relationship between electron transport rate (ETR) and irradiance was measured in five cultivars of Oryza sativa in canopy conditions with PAM fluorescence under natural solar radiation...
November 28, 2016: Plant Physiology
https://www.readbyqxmd.com/read/27893106/evidence-for-a-gpr18-role-in-diurnal-regulation-of-intraocular-pressure
#10
Sally Miller, Emma Leishman, Olivia Oehler, Laura Daily, Natalia Murataeva, Jim Wager-Miller, Heather Bradshaw, Alex Straiker
Purpose: The diurnal cycling of intraocular pressure (IOP) was first described in humans more than a century ago. This cycling is preserved in other species. The physiologic underpinning of this diurnal variation in IOP remains a mystery, even though elevated pressure is indicated in most forms of glaucoma, a common cause of blindness. Once identified, the system that underlies diurnal variation would represent a natural target for therapeutic intervention. Methods: Using normotensive mice, we measured the regulation of ocular lipid species by the enzymes fatty acid amide hydrolase (FAAH) and N-arachidonoyl phosphatidylethanolamine phospholipase (NAPE-PLD), mRNA expression of these enzymes, and their functional role in diurnal regulation of IOP...
November 1, 2016: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/27889085/impact-of-diurnal-variability-and-meteorological-factors-on-the-pm2-5-aod-relationship-implications-for-pm2-5-remote-sensing
#11
Jianping Guo, Feng Xia, Yong Zhang, Huan Liu, Jing Li, Mengyun Lou, Jing He, Yan Yan, Fu Wang, Min Min, Panmao Zhai
PM2.5 retrieval from space is still challenging due to the elusive relationship between PM2.5 and aerosol optical depth (AOD), which is further complicated by meteorological factors. In this work, we investigated the diurnal cycle of PM2.5 in China, using ground-based PM measurements obtained at 226 sites of China Atmosphere Watch Network during the period of January 2013 to December 2015. Results showed that nearly half of the sites witnessed a PM2.5 maximum in the morning, in contrast to the least frequent occurrence (5%) in the afternoon when strong solar radiation received at the surface results in rapid vertical diffusion of aerosols and thus lower mass concentration...
November 23, 2016: Environmental Pollution
https://www.readbyqxmd.com/read/27885090/the-impact-of-circadian-rhythms-on-medical-imaging-and-radiotherapy-regimes-for-the-paediatric-patient
#12
E Forssell-Aronsson, R A Quinlan
Daily rhythmic changes are found in cellular events in cell cycle, DNA repair, apoptosis and angiogenesis in both normal and tumour tissue, as well as in enzymatic activity and drug metabolism. In this paper, we hypothesize that circadian rhythms need to be considered in radiation protection and optimization in personalized medicine, especially for paediatric care. The sensitivity of the eye lens to ionizing radiation makes the case for limiting damage to the lens epithelium by planning medical radio-imaging procedures for the afternoon, rather than the morning...
November 24, 2016: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/27882015/are-serum-eosinophilic-cationic-protein-levels-of-toll-collectors-affected-by-diesel-exhaust-exposure
#13
Cahit Bilgin, Peri Arbak, Ozlem Yavuz, Ege Gulec Balbay, Oner Balbay, Ali Nihat Annakkaya
OBJECTIVE: There are few studies on the diesel exhaust particulates (DEP) / eosinophilic cationic protein (ECP) level relationship. This study aimed to detect ECP levels in a highly DE exposed group, named as toll collectors. METHODS: In a cross-sectional study, levels of serum ECP, rates of respiratory symptoms, mean levels of respiratory functions, smoking status, and variations in peak expiratory flow (PEF) during weekends and working days were compared for 68 toll collectors (TC) (range of age, 24-48 years) and 28 controls (range of age, 25-61 years)...
September 2016: Pakistan Journal of Medical Sciences Quarterly
https://www.readbyqxmd.com/read/27876391/critical-evaluation-of-monitoring-strategy-for-the-multi-residue-determination-of-90-chiral-and-achiral-micropollutants-in-effluent-wastewater
#14
Bruce Petrie, Kathryn Proctor, Jane Youdan, Ruth Barden, Barbara Kasprzyk-Hordern
It is essential to monitor the release of organic micropollutants from wastewater treatment plants (WWTPs) for developing environmental risk assessment and assessing compliance with legislative regulation. In this study the impact of sampling strategy on the quantitative determination of micropollutants in effluent wastewater was investigated. An extended list of 90 chiral and achiral micropollutants representing a broad range of biological and physico-chemical properties were studied simultaneously for the first time...
November 19, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27873228/hypertension-in-chronic-kidney-disease
#15
Seyed Mehrdad Hamrahian, Bonita Falkner
Hypertension, a global public health problem, is currently the leading factor in the global burden of disease. It is the major modifiable risk factor for heart disease, stroke and kidney failure. Chronic kidney disease (CKD) is both a common cause of hypertension and CKD is also a complication of uncontrolled hypertension. The interaction between hypertension and CKD is complex and increases the risk of adverse cardiovascular and cerebrovascular outcomes. This is particularly significant in the setting of resistant hypertension commonly seen in patient with CKD...
November 22, 2016: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/27872898/the-impact-of-variable-wind-shear-coefficients-on-risk-reduction-of-wind-energy-projects
#16
Kenneth W Corscadden, Allan Thomson, Behrang Yoonesi, Josiah McNutt
Estimation of wind speed at proposed hub heights is typically achieved using a wind shear exponent or wind shear coefficient (WSC), variation in wind speed as a function of height. The WSC is subject to temporal variation at low and high frequencies, ranging from diurnal and seasonal variations to disturbance caused by weather patterns; however, in many cases, it is assumed that the WSC remains constant. This assumption creates significant error in resource assessment, increasing uncertainty in projects and potentially significantly impacting the ability to control gird connected wind generators...
2016: International Scholarly Research Notices
https://www.readbyqxmd.com/read/27867784/on-the-sensitivity-of-the-diurnal-cycle-in-the-amazon-to-convective-intensity
#17
Kyle F Itterly, Patrick C Taylor, Jason B Dodson, Ahmed B Tawfik
Climate and reanalysis models contain large water and energy budget errors over tropical land related to the misrepresentation of diurnally forced moist convection. Motivated by recent work suggesting that the water and energy budget is influenced by the sensitivity of the convective diurnal cycle to atmospheric state, this study investigates the relationship between convective intensity, the convective diurnal cycle, and atmospheric state in a region of frequent convection-the Amazon. Daily, 3-hourly satellite observations of top of atmosphere (TOA) fluxes from Clouds and the Earth's Radiant Energy System Ed3a SYN1DEG and precipitation from Tropical Rainfall Measuring Mission 3B42 data sets are collocated with twice daily Integrated Global Radiosonde Archive observations from 2002 to 2012 and hourly flux tower observations...
July 27, 2016: Journal of Geophysical Research. Atmospheres: JGR
https://www.readbyqxmd.com/read/27864091/diurnal-variations-in-subcutaneous-allergen-immunotherapy-reactions
#18
Aakash A Bavishi, Leslie C Grammer, Jacqueline Pongracic, Karen Rychlik, Rajesh Kumar, Phyllis Zee, Paul A Greenberger, Anna B Fishbein
BACKGROUND: Circadian rhythms underlie many immune responses and allergic diseases. Subcutaneous immunotherapy (SCIT) can result in adverse reactions; however, it is unclear whether such reactions have a diurnal pattern. OBJECTIVE: To assess whether the timing of SCIT affects the rate of adverse reactions. METHODS: This study was a retrospective medical record review of adult patients (n = 289) who received SCIT at the Northwestern Medical Faculty Foundation, Chicago, Illinois, during a 10-year period (2004-2014)...
November 15, 2016: Annals of Allergy, Asthma & Immunology
https://www.readbyqxmd.com/read/27859082/inactive-trout-come-out-at-night-behavioral-variation-circadian-activity-and-fitness-in-the-wild
#19
Libor Závorka, David Aldvén, Joacim Näslund, Johan Höjesjö, Jörgen I Johnsson
Theory suggests that high activity levels in animals increase growth at the cost of increased mortality. This growth-mortality tradeoff has recently been incorporated into the wider framework of the pace-of-life syndrome (POLS) hypothesis. However, activity is often quantified only in the laboratory and on a diurnal basis, leaving open the possibility that animals manage predation risk and feeding efficiency in the wild by modulating their circadian activity rhythms. Here we investigate how laboratory activity in wild brown trout parr (Salmo trutta L...
September 2016: Ecology
https://www.readbyqxmd.com/read/27856849/rosetta-s-comet-67p-churyumov-gerasimenko-sheds-its-dusty-mantle-to-reveal-its-icy-nature
#20
S Fornasier, S Mottola, H U Keller, M A Barucci, B Davidsson, C Feller, J D P Deshapriya, H Sierks, C Barbieri, P L Lamy, R Rodrigo, D Koschny, H Rickman, M A'Hearn, J Agarwal, J-L Bertaux, I Bertini, S Besse, G Cremonese, V Da Deppo, S Debei, M De Cecco, J Deller, M R El-Maarry, M Fulle, O Groussin, P J Gutierrez, C Güttler, M Hofmann, S F Hviid, W-H Ip, L Jorda, J Knollenberg, G Kovacs, R Kramm, E Kührt, M Küppers, M L Lara, M Lazzarin, J J Lopez Moreno, F Marzari, M Massironi, G Naletto, N Oklay, M Pajola, A Pommerol, F Preusker, F Scholten, X Shi, N Thomas, I Toth, C Tubiana, J-B Vincent
The Rosetta spacecraft has investigated comet 67P/Churyumov-Gerasimenko from large heliocentric distances to its perihelion passage and beyond. We trace the seasonal and diurnal evolution of the colors of the 67P nucleus, finding changes driven by sublimation and recondensation of water ice. The whole nucleus became relatively bluer near perihelion, as increasing activity removed the surface dust, implying that water ice is widespread underneath the surface. We identified large (1500 m(2)) ice-rich patches appearing and then vanishing in about 10 days, indicating small-scale heterogeneities on the nucleus...
November 17, 2016: Science
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