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https://www.readbyqxmd.com/read/28931157/is-nocturnal-foraging-in-a-tropical-bee-an-escape-from-interference-competition
#1
Adam R Smith, Shannon M Kitchen, Ryan M Toney, Christian Ziegler
Temporal niche partitioning may result from interference competition if animals shift their activity patterns to avoid aggressive competitors. If doing so also shifts food sources, it is difficult to distinguish the effects of interference and consumptive competition in selecting for temporal niche shift. Bees compete for pollen and nectar from flowers through both interference and consumptive competition, and some species of bees have evolved nocturnality. Here, we use tropical forest canopy towers to observe bees (the night-flying sweat bees Megalopta genalis and M...
January 1, 2017: Journal of Insect Science
https://www.readbyqxmd.com/read/28931072/high-prevalence-of-non-dipping-blood-pressure-and-vascular-stiffness-in-hiv-infected-south-africans-on-antiretrovirals
#2
M S Borkum, J M Heckmann, K Manning, J A Dave, N S Levitt, B L Rayner, N Wearne
BACKGROUND: HIV-infected individuals are at increased risk of tissue inflammation and accelerated vascular aging ('inflamm-aging'). Abnormal diurnal blood pressure (BP) rhythms such as non-dipping may contribute to an increased risk of cardiovascular and cerebrovascular events in HIV infected individuals. However, little data exists on ambulatory blood pressure (ABP) and measures of vascular stiffness in the black African HIV infected population. METHODS: This is a cross-sectional analysis of otherwise well, HIV infected outpatients on ART for >5 years...
2017: PloS One
https://www.readbyqxmd.com/read/28928374/rethinking-the-origin-of-primates-by-reconstructing-their-diel-activity-patterns-using-genetics-and-morphology
#3
Yonghua Wu, Haifeng Wang, Haitao Wang, Elizabeth A Hadly
Phylogenetic inference typically invokes nocturnality as ancestral in primates; however, some recent studies posit that diurnality is. Here, through adaptive evolutionary analyses of phototransduction genes by using a variety of approaches (restricted branch/branch-site models and unrestricted branch-site-based models (BS-REL, BUSTED and RELAX)), our results consistently showed that ancestral primates were subjected to enhanced positive selection for bright-light vision and relatively weak selection for dim-light vision...
September 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28928228/salivary-%C3%AE-amylase-in-on-call-from-home-fire-and-emergency-service-personnel
#4
Sarah Janet Hall, Brad Aisbett, Sam J Robertson, Sally A Ferguson, Anne Turner
The effect of working on-call from home on sympatho-adrenal medullary (SAM) system activity is currently unknown. This study had two aims, Aim 1: examine salivary α-amylase awakening response (AAR) and diurnal salivary α-amylase (sAA) profile in fire and emergency service workers who operate on-call from home following a night on-call with a call (NIGHT-CALL), a night on-call without a call (NO-CALL) and an off-call night (OFF-CALL) and, Aim 2: explore whether there was an anticipatory effect of working on-call from home (ON) compared to when off-call (OFF) on the diurnal sAA profile...
September 19, 2017: Endocrine Connections
https://www.readbyqxmd.com/read/28927285/impact-of-a-basal-bolus-insulin-regimen-on-metabolic-control-and-risk-of-hypoglycemia-in-patients-with-diabetes-undergoing-peritoneal-dialysis
#5
Ana María Gómez, Santiago Vallejo, Freddy Ardila, Oscar M Muñoz, Álvaro J Ruiz, Mauricio Sanabria, Alfonso Bunch, Elly Morros, Laura Kattah, Maira García-Jaramillo, Fabián León-Vargas
INTRODUCTION: Clinical interventional studies in diabetes mellitus usually exclude patients undergoing peritoneal dialysis (PD). This study evaluates the impact of an educational program and a basal-bolus insulin regimen on the blood glucose level control and risk of hypoglycemia in this population. METHODS: A before-and-after study was conducted in type 1 and type 2 DM patients undergoing PD at the Renal Therapy Services (RTS) clinic network, Bogota, Colombia. An intervention was instituted consisting of a three-month educational program and a basal-bolus detemir (Levemir, NovoNordisk) and aspart (Novorapid, NovoNordisk) insulin regimen...
September 1, 2017: Journal of Diabetes Science and Technology
https://www.readbyqxmd.com/read/28927239/tubulins-rhythms-and-cell-walls-in-poplar-leaves-it-s-all-in-the-timing
#6
Scott A Harding, Hao Hu, Batbayar Nyamdari, Liang-Jiao Xue, Radnaa Naran, Chung-Jui Tsai
Plant cell walls exhibit architectural and compositional changes throughout their development and in response to external cues. While tubulins are involved in cell wall biogenesis, much remains unknown about the scope of their involvement during the orchestration of this resource-demanding process. A transgenic approach coupled with cell wall compositional analysis, RNA-seq and mining of publicly available diurnal gene expression data was used to assess the involvement of tubulins in poplar leaf cell wall biogenesis...
September 12, 2017: Tree Physiology
https://www.readbyqxmd.com/read/28926789/profiling-quinones-in-ambient-air-samples-collected-from-the-athabasca-region-canada
#7
Andrzej Wnorowski, Jean-Pierre Charland
This paper presents new findings on polycyclic aromatic hydrocarbon oxidation products-quinones that were collected in ambient air samples in the proximity of oil sands exploration. Quinones were characterized for their diurnal concentration variability, phase partitioning, and molecular size distribution. Gas-phase (GP) and particle-phase (PM) ambient air samples were collected separately in the summer; a lower quinone content was observed in the PM samples from continuous 24-h sampling than from combined 12-h sampling (day and night)...
September 5, 2017: Chemosphere
https://www.readbyqxmd.com/read/28926361/association-between-day-by-day-and-ambulatory-blood-pressure-variability-in-type-2-diabetes-patients
#8
Hiroyuki Iuchi, Masaya Sakamoto, Daisuke Matsutani, Hirofumi Suzuki, Yosuke Kayama, Norihiko Takeda, Kazunori Utsunomiya
It remains unclear whether ambulatory blood pressure variability (BPV) contributes toward day-by-day BPV, despite the fact that not only day-by-day but also ambulatory BPV is reported to be a risk factor for type 2 diabetes patients. This study aimed to determine the association between day-by-day BPV and ambulatory BPV, which is especially distinguished between diurnal and nocturnal BPV, in type 2 diabetes patients. Day-by-day and ambulatory BPV were assessed in 30 type 2 diabetes patients (aged 54±15 years; 87% men; glycated hemoglobin: 9...
September 18, 2017: Blood Pressure Monitoring
https://www.readbyqxmd.com/read/28922793/diurnal-cycling-transcription-factors-of-pineapple-revealed-by-genome-wide-annotation-and-global-transcriptomic-analysis
#9
Anupma Sharma, Ching Man Wai, Ray Ming, Qingyi Yu
Circadian clock provides fitness advantage by coordinating internal metabolic and physiological processes to external cyclic environments. Core clock components exhibit daily rhythmic changes in gene expression, and the majority of them are transcription factors (TFs) and transcription coregulators (TCs). We annotated 1,398 TFs from 67 TF families and 80 TCs from 20 TC families in pineapple, and analyzed their tissue-specific and diurnal expression patterns. Approximately 42% of TFs and 45% of TCs displayed diel rhythmic expression, including 177 TF/TCs cycling only in the nonphotosynthetic leaf tissue, 247 cycling only in the photosynthetic leaf tissue, and 201 cycling in both...
September 1, 2017: Genome Biology and Evolution
https://www.readbyqxmd.com/read/28920942/exponential-growth-and-selection-in-self-replicating-materials-from-dna-origami-rafts
#10
Xiaojin He, Ruojie Sha, Rebecca Zhuo, Yongli Mi, Paul M Chaikin, Nadrian C Seeman
Self-replication and evolution under selective pressure are inherent phenomena in life, and but few artificial systems exhibit these phenomena. We have designed a system of DNA origami rafts that exponentially replicates a seed pattern, doubling the copies in each diurnal-like cycle of temperature and ultraviolet illumination, producing more than 7 million copies in 24 cycles. We demonstrate environmental selection in growing populations by incorporating pH-sensitive binding in two subpopulations. In one species, pH-sensitive triplex DNA bonds enable parent-daughter templating, while in the second species, triplex binding inhibits the formation of duplex DNA templating...
September 18, 2017: Nature Materials
https://www.readbyqxmd.com/read/28920802/summer-and-winter-vitamin-d3-levels-in-seven-platyrrhine-species-housed-at-a-british-zoo-with-reference-to-natural-uvb-levels
#11
Rowena Killick, Richard Saunders, Sharon P Redrobe
Serum samples were collected from 24 platyrrhines of seven diurnal species housed with outdoor access at Bristol Zoo Gardens (United Kingdom) to test 25-hydroxyvitamin D3 (25OHD3) levels as part of the veterinary department's preventative health care program. Samples were collected in August 2008 (summer) and January 2009 (winter) to examine the effect of season on 25OHD3 levels. Dietary levels of vitamin D3 remained the same throughout the study period and fell within the range of 2000-4000 IU/kg dry matter, in accordance with current primate guidelines...
September 2017: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/28920168/the-online-measured-black-carbon-aerosol-and-source-orientations-in-the-nam-co-region-tibet
#12
Xin Zhang, Jing Ming, Zhongqin Li, Feiteng Wang, Guoshuai Zhang
Equivalent black carbon (eBC) mass concentrations were measured by an aethalometer (AE-31) in the Nam Co, central Tibet from 2010 to 2014. Different from previous filter-sampling studies (Ming et al., J Environ Sci 22(11):1748-1756, 2010; Zhao et al., Environ Sci Pollut Res 20:5827-5838, 2013), the first high-resolution online eBC measurement conducted in central Tibet is reported here, allowing to discuss the diurnal variations as well as seasonal variabilities of eBC. Average daily eBC concentration was 74 ± 50 ng/m(3), reflecting a global background level...
September 17, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28918760/effects-of-a-school-readiness-intervention-on-hypothalamus-pituitary-adrenal-axis-functioning-and-school-adjustment-for-children-in-foster-care
#13
Alice M Graham, Katherine C Pears, Hyoun K Kim, Jacqueline Bruce, Philip A Fisher
Maltreated children in foster care are at high risk for dysregulated hypothalamus-pituitary-adrenal (HPA) axis functioning and educational difficulties. The present study examined the effects of a short-term school readiness intervention on HPA axis functioning in response to the start of kindergarten, a critical transition marking entry to formal schooling, and whether altered HPA axis functioning influenced children's school adjustment. Compared to a foster care comparison group, children in the intervention group showed a steeper diurnal cortisol slope on the first day of school, a pattern previously observed among nonmaltreated children...
September 18, 2017: Development and Psychopathology
https://www.readbyqxmd.com/read/28918281/distribution-of-vocs-in-urban-and-rural-atmospheres-of-subtropical-india-temporal-variation-source-attribution-ratios-ofp-and-risk-assessment
#14
Amit Kumar, Deepak Singh, Krishan Kumar, Braj Bihari Singh, Vinod Kumar Jain
This paper reports the first study which comprises the seasonal, diurnal variability, source characterization, ozone forming potential and risk assessment of volatile organic compounds (VOCs) at three sites (two urban and one rural) in the National Capital Territory of Delhi, India. The study was performed during three seasons of the year 2013-14 and two different categories of VOCs (aromatics and halogenated) have been selected. The study used the sampling and analytical procedures of NIOSH methods. Results showed that the mean concentration of sum of VOCs (∑VOC) is significantly higher at urban sites (110...
September 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28917979/plantar-reflex-excitability-is-increased-in-the-evening-in-restless-legs-syndrome-patients
#15
Chloe Dafkin, Andrew Green, Benita Olivier, Warrick McKinon, Samantha Kerr
OBJECTIVE: To investigate if diurnal changes in spinal excitability (plantar reflex) occur in restless legs syndrome (RLS) participants compared to healthy matched controls. METHODS: Thirteen RLS participants and 13 healthy control participants' plantar reflex responses were evaluated in the evening (PM) and the morning (AM). Plantar reflex responses were assessed electromyographically, using motion analysis (kinematically) and by subjective nociception (Visual Analogue Scale)...
September 13, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28917499/association-of-sleep-with-sudden-unexpected-death-in-epilepsy
#16
REVIEW
Ahmer Ali, Shasha Wu, Naoum P Issa, Sandra Rose, Vernon L Towle, Peter Warnke, James X Tao
OBJECTIVE: The objective of this study was to determine the association of sleep with sudden unexpected death in epilepsy (SUDEP). METHODS: We conducted a systematic review and meta-analysis based on literature search from databases PubMed, Web of Science, and Scopus using keywords "SUDEP", or "sudden unexpected death in epilepsy", or "sudden unexplained death in epilepsy". Sudden unexpected death in epilepsy was considered to occur during sleep if the patient was found in bed, if the SUDEP cases were documented as in sleep, or if the patient was found at bedside on the bedroom floor...
September 13, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28916681/circannual-testis-and-moult-cycles-persist-under-photoperiods-that-disrupt-circadian-activity-and-clock-gene-cycles-in-spotted-munia
#17
Neha Agarwal, Ila Mishra, Ruchi Komal, Sangeeta Rani, Vinod Kumar
We investigated if circannual rhythms underlying annual testis maturation and moult cycles were independent of the duration and frequency of light period and the circadian clock control in non-photoperiodic spotted munia. Birds were subjected to an aberrant light-dark (LD) cycle (3.5L:3.5D; T7, T=period length of LD cycle) and continuous light (LL, 24L:0D), with controls on 12L:12D (T24, 24 h LD cycle). Initial experiment measured the activity pattern and 24 h mRNA oscillations of circadian clock genes (bmal1, clock, per2, cry1, cry2) in the hypothalamus, putative site of the seasonal timing...
September 15, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28914847/-efficiency-of-triple-antihypertensive-therapy-in-patients-with-uncontrolled-hypertension-and-depressive-disorders
#18
V V Skibitsky, A V Fendrikova, A V Skibitsky
AIM: To evaluate the efficiency of triple antihypertensive therapy in patients with uncontrolled hypertension and depressive disorders (DD). MATERIAL AND METHODS: 153 patients with uncontrolled hypertension were examined, of whom 82 patients were diagnosed with mild and moderate DD. A combination of perindopril 10 mg/day, indapamide SR 1.5 mg/day, and amlodipine at an initial dose of 5 mg/day was given to patients with hypertension and DD. After 4 weeks of treatment, if target blood pressure (BP) levels could not be achieved, the dose of amlodipine was increased up to 10 mg/day...
2017: Terapevticheskiĭ Arkhiv
https://www.readbyqxmd.com/read/28911277/analysis-of-different-melatonin-secretion-patterns-in-children-with-sleep-disorders-melatonin-secretion-patterns-in-children
#19
Ana Checa-Ros, Antonio Muñoz-Hoyos, Antonio Molina-Carballo, Antonio Muñoz-Gallego, Susana Narbona-Galdó, Antonio Jerez-Calero, María Del Carmen Augustín-Morales
The objective of this study was to analyze circadian patterns of urinary 6-sulphatoxymelatonin (aMT6s) excretion in children with primary sleep disorders in comparison with healthy controls. A total of 124 control children and 124 patients (aged 4-14 years) diagnosed with diverse primary sleep disorders were recruited. aMT6s concentrations were measured in diurnal and nocturnal urine, as well as in 24-hour urine. aMT6s levels were significantly higher and showed significantly more evident circadian variations in the control group ( P < ...
October 2017: Journal of Child Neurology
https://www.readbyqxmd.com/read/28910551/effects-of-differences-in-the-availability-of-light-upon-the-circadian-rhythms-of-institutionalized-elderly
#20
José A Rubiño, Antoni Gamundí, Mourad Akaarir, Francesca Cañellas, Rubén Rial, Neus Ballester, M Cristina Nicolau
The aim of this study was to compare the availability of diurnal and nocturnal light in two residences for aged persons (R1 and R2, Palma de Mallorca, Illes Balears, Spain). We found that the R1 inmates were exposed to lower amounts of light during waking time and higher amounts during sleeping time. The main traits of the circadian rhythms and the quality of sleep in the inmates of the two residences were found to be positively related to the availability of light during waking time and negatively to the increased light exposure during bed time...
September 14, 2017: Chronobiology International
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