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https://www.readbyqxmd.com/read/28526480/human-seasonal-and-circadian-studies-in-antarctica-halley-75-0-s
#1
Josephine Arendt, Benita Middleton
Living for extended periods in Antarctica exposes base personnel to extremes of daylength (photoperiod) and temperature. At the British Antarctic Survey base of Halley, 75(0)S, the sun does not rise for 110 d in the winter and does not set for 100 d in summer. Photoperiod is the major time cue governing the timing of seasonal events such as reproduction in many species. The neuroendocrine signal providing photoperiodic information to body physiology is the duration of melatonin secretion which reflects the length of the night: longer in the short days of winter and shorter in summer...
May 16, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28525444/cardiovascular-disease-risk-profile-and-readiness-to-change-in-blue-and-white-collar-workers
#2
Kerith D Aginsky, Demitri Constantinou, Maretha Delport, Estelle D Watson
This study provides a health and risk profile of blue- (BCWs) and white-collar workers (WCWs). Health screening data (n = 603; age 38.2 ± 9.7 years) included cholesterol and glucose finger-prick test, blood pressure, body mass index, and self-reported stress levels and readiness to change. Blue-collar workers were significantly older and had higher blood pressure readings and were more likely to develop hypertension (odds ratio [OR]: 1.72; 95% confidence interval [CI]: 1.05-2.81; P = .03), but less likely to present with hypercholesterolemia (OR: 0...
July 2017: Family & Community Health
https://www.readbyqxmd.com/read/28503383/social-relationships-enhance-the-time-spent-eating-and-intake-of-a-novel-diet-in-pregnant-hanwoo-bos-taurus-coreanae-heifers
#3
Dong-Han Shin, Hyun-Min Kang, Seongwon Seo
The objective of this study was to evaluate the effects of social relationships on the feed intake, eating behavior, and growth, upon exposure to a novel diet, in Hanwoo (Bos taurus coreanae) heifers during pregnancy. Twenty-four pregnant Hanwoo heifers, averaging 438 ± 27.8 kg in weight, 21 months in age, and 194 ± 8.5 days in pregnancy, were involved in a two-month (eight weeks) experiment. The heifers were randomly assigned to either the single housing group (SG; one individual per pen, n = 12), or the paired housing group (PG; two individuals per pen, n = 12)...
2017: PeerJ
https://www.readbyqxmd.com/read/28482006/predictability-and-parallelism-of-multi-trait-adaptation
#4
Randall Brian Langerhans
Environments shape the traits of organisms. Environmental variation may rarely alter selection on only a few traits, but instead precipitate wholesale changes of the multidimensional selective regime-many traits might experience divergent selection across divergent environments. Such changes in selection can elicit multifarious evolution. How predictable (from theory) and how parallel (consistent occurrences) is multi-trait divergence across replicated environments? Here, I address this question using the post-Pleistocene radiation of Bahamas mosquitofish (Gambusia hubbsi) inhabiting blue holes on Andros Island...
May 6, 2017: Journal of Heredity
https://www.readbyqxmd.com/read/28475965/how-could-discharge-management-affect-florida-spring-fish-assemblage-structure
#5
Kirsten Work, Keneil Codner, Melissa Gibbs
Freshwater bodies are increasingly affected by reductions in water quantity and quality and by invasions of exotic species. To protect water quantity and maintain the ecological integrity of many water bodies in central Florida, a program of adopting Minimum Flows and Levels (MFLs) has begun for both lentic and lotic waters. The purpose of this study was to determine whether there were relationships between discharge and stage, water quality, and biological parameters for Volusia Blue Spring, a first magnitude spring (discharge > 380,000 m(3) day(-1) or 100 mgd) for which an MFL program was adopted in 2006...
May 2, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28475520/mucocutaneous-hyperpigmentation-in-a-patient-with-a-history-of-both-minocycline-and-silver-ingestion
#6
Angel Fernandez-Flores, Thao Nguyen, David S Cassarino
Minocycline is a derivative of tetracycline. It has been widely used in dermatology for the treatment of acne and rosacea. One of its adverse effects is pigmentation of various body tissues. Clinically, 3 main distinct types of hyperpigmentation by minocycline have been distinguished: type I, with blue-gray to black pigment on the face in areas of scarring or inflammation; type II, with blue-gray pigment on normal skin of the legs, forearms and on the shins; and type III, with a diffuse muddy-brown discoloration in areas of sun exposure...
April 27, 2017: American Journal of Dermatopathology
https://www.readbyqxmd.com/read/28470307/probing-the-dynamics-of-n-methylacetamide-in-methanol-via-ab-initio-molecular-dynamics
#7
Vivek K Yadav, Michael L Klein
Two-dimensional infrared (2D IR) spectroscopy of amide 1 vibrational bands provides a valuable probe of proteins as well as molecules such as N-methylacetamide (NMA), which present peptide-like H-bonding possibilities to a solvent. To assist in rationalizing a large body of experimental 2D IR data on NMA in both aqueous and non-aqueous solvents, we have performed an ab initio molecular dynamics simulation of NMA in methanol. Our study enables us to compare and contrast our findings with earlier calculations on NMA in water, and thereby explore the effect of solvent on the structural and dynamical properties of the NMA solute...
May 4, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28468769/an-animal-like-cryptochrome-controls-the-chlamydomonas-sexual-cycle
#8
Yong Zou, Sandra Wenzel, Nico Müller, Katja Prager, Elke-Martina Jung, Erika Kothe, Tilman Kottke, Maria Mittag
Cryptochromes are known as flavin-binding blue light receptors in bacteria, fungi, plants and insects. The animal-like cryptochrome (aCRY) of the green alga Chlamydomonas reinhardtii has extended our view on cryptochromes, because it responds also to other wavelengths of the visible spectrum, including red light. Here, we have investigated if aCRY is involved in the regulation of the sexual life cycle of C. reinhardtii, which is controlled by blue and red light at both, the step of gametogenesis and of germination...
May 3, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28467685/structural-alterations-in-tumor-draining-lymph-nodes-before-papillary-thyroid-carcinoma-metastasis
#9
Andrew M Hinson, Nicole A Massoll, Lee Ann Jolly, Brendan C Stack, Donald L Bodenner, Aime T Franco
BACKGROUND: The purpose of this study was to define and characterize the thyroid tumor-draining lymph nodes in genetically engineered mice harboring thyroid-specific expression of oncogenic Braf(V600E) with and without Pten insufficiency. METHODS: After intratumoral injection of methylene blue, the lymphatic drainage of the thyroid gland was visualized in real time. The thyroid gland/tumor was resected en bloc with the respiratory system for histological analysis...
May 3, 2017: Head & Neck
https://www.readbyqxmd.com/read/28464097/live-animal-assessments-of-rump-fat-and-muscle-score-in-angus-cows-and-steers-using-3-dimensional-imaging
#10
M J McPhee, B J Walmsley, B Skinner, B Littler, J P Siddell, L M Cafe, J F Wilkins, V H Oddy, A Alempijevic
The objective of this study was to develop a proof of concept for using off-the-shelf Red Green Blue-Depth (RGB-D) Microsoft Kinect cameras to objectively assess P8 rump fat (P8 fat; mm) and muscle score (MS) traits in Angus cows and steers. Data from low and high muscled cattle (156 cows and 79 steers) were collected at multiple locations and time points. The following steps were required for the 3-dimensional (3D) image data and subsequent machine learning techniques to learn the traits: 1) reduce the high dimensionality of the point cloud data by extracting features from the input signals to produce a compact and representative feature vector, 2) perform global optimization of the signatures using machine learning algorithms and a parallel genetic algorithm, and 3) train a sensor model using regression-supervised learning techniques on the ultrasound P8 fat and the classified learning techniques for the assessed MS for each animal in the data set...
April 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28463583/decolorization-of-acid-disperse-and-reactive-dyes-by-trametes-versicolor-cbr43
#11
Seung-Ok Yang, Hong Sodaneath, Jung-In Lee, Hyekyeng Jung, Jin-Hee Choi, Hee Wook Ryu, Kyung-Suk Cho
The mycoremediation has been considered as a promising method for decolorizing dye wastewater. To explore new bioresource for mycoremediation, a new white-rot fungus that could decolorize various dyes commonly used in textile industries was isolated, and its ligninolytic enzyme activity and decolorization capacity were characterized. The isolated CBR43 was identified as Trametes versicolor based on the morphological properties of its fruit body and spores, as well as through partial 18S rDNA gene sequences...
May 2, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28456772/lafutidine-a-histamine-h2-receptor-antagonist-with-mucosal-protective-properties-attenuates-5-fluorouracil-induced-intestinal-mucositis-in-mice-through-activation-of-extrinsic-primary-afferent-neurons
#12
T Sano, D Utsumi, K Amagase, K Matsumoto, M Tominaga, K Higuchi, T Takeuchi, S Kato
Intestinal mucositis accompanied by severe diarrhea is one of the most common side effects during cancer chemotherapy. Lafutidine, a histamine H2 receptor antagonist with mucosal protective properties via sensory afferent neurons, is used for the treatment of upper gastrointestinal diseases. The present study investigated the effects of lafutidine on 5-fluorouracil (5-FU)-induced intestinal mucositis induced in mice. Male C57BL/6 wild-type (WT), sensory deafferented mice, and transient receptor potential vanilloid subfamily 1 knockout (TRPV1KO) mice were used...
February 2017: Journal of Physiology and Pharmacology: An Official Journal of the Polish Physiological Society
https://www.readbyqxmd.com/read/28456763/female-white-collar-workers-remain-at-higher-risk-of-breast-cancer-after-adjustments-for-individual-risk-factors-related-to-reproduction-and-lifestyle
#13
Cecilia Kullberg, Jenny Selander, Maria Albin, Signe Borgquist, Jonas Manjer, Per Gustavsson
OBJECTIVES: The aim was to investigate the variation in risk of breast cancer between occupational groups with a focus on white-collar and blue-collar workers and to investigate to what extent the differences were explained by risk factors related to reproduction and lifestyle. METHODS: Between 1991 and 1996, 14 119 women born between 1923 and 1950 and residents of Malmö, Sweden, were included in this cohort study. Individual data on risk factors (eg, age, parity, age at first child, months of breast feeding per child, hormonal replacement therapy, physical activity, alcohol consumption, smoking, height and body mass index) and occupational history were assessed using a questionnaire...
April 29, 2017: Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/28451353/highly-specific-noninvasive-photoacoustic-and-positron-emission-tomography-of-brain-plaque-with-functionalized-croconium-dye-labeled-by-a-radiotracer
#14
Yajing Liu, Yanping Yang, Mingjian Sun, Mengchao Cui, Ying Fu, Yu Lin, Zijing Li, Liming Nie
Highly-efficient targeting probes are desirable for disease diagnosis and functional imaging. However, most of the current near-infrared (NIR) probes suffer from low signal conversion, insufficient photostability, poor probe specificity, and limited functions. Herein, an NIR ultrahigh absorbing croconium dye for amyloid (CDA) was designed and synthesized to specifically bind to cerebrovascular amyloid without antibody linkage. This unique CDA is able to strongly bind the hydrophobic channels of amyloid beta (Aβ) fiber with a very strong binding energy of -9...
April 1, 2017: Chemical Science
https://www.readbyqxmd.com/read/28448264/use-of-ovine-based-collagen-extracellular-matrix-and-gentian-violet-methylene-blue-antibacterial-foam-dressings-to-help-improve-clinical-outcomes-in-lower-extremity-wounds-a-retrospective-cohort-study
#15
Eric L Lullove
Dressings that provide broad spectrum metalloprotease reduction along with inherent aspects of an extracellular matrix may contribute to improved wound healing outcomes and shorter treatment times. OBJECTIVE: The author performed a retrospective case series analysis to determine the clinical outcomes of regular debridement with the use of ovine-based collagen extracellular matrix dressings and gentian violet/methylene blue polyurethane antibacterial foam dressings in treating 53 patients with 53 chronic lower extremity wounds (diabetic foot ulcers [DFUs], venous leg ulcers, and heel pressure ulcers)...
April 2017: Wounds: a Compendium of Clinical Research and Practice
https://www.readbyqxmd.com/read/28445880/heating-of-newborn-infants-due-to-blue-light-emitting-diode-fibreoptic-phototherapy-pads
#16
Pei Ling Ng, Tony Carlisle, Marleesa Ly, Scott Adam Morris
BACKGROUND: Surface temperatures of fibreoptic phototherapy pads using a high intensity blue light-emitting diode (LED) light source have not been studied. OBJECTIVES: The aim of this study was to measure the temperature of LED fibreoptic phototherapy pads during phototherapy in a bench-top study, and to determine temperature effects on babies during phototherapy. METHODS: A commercially available LED fibreoptic phototherapy system was tested...
April 27, 2017: Neonatology
https://www.readbyqxmd.com/read/28444555/evaluating-the-effectiveness-of-a-novel-atomized-liquid-needle-free-transdermal-delivery-system
#17
Yi-Huei Huang, Chieh-Shen Hu, Yi-Jhen Ke, Chiao-Hsi Chiang, Po-Da Hong, Ming-Kung Yeh
Needle-free jet injections constitute a crucial method for drug delivery. A novel liquid drug delivery system has been proposed recently, in which pressure atomizes liquid before delivering that atomized liquid to the patient's body; however, the mechanism and efficiency of the system are unclear. This study explored the shot delivery pressure, penetration depth, and cumulative amount of permeation of this system. This system was used to deliver 0.5% (w/v) methylene blue to agarose phantoms at various shot delivery pressures...
April 25, 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/28442122/the-effect-of-temperature-on-cyclic-fatigue-of-nickel-titanium-rotary-endodontic-instruments
#18
Amandeep Dosanjh, Susan Paurazas, Mazin Askar
INTRODUCTION: This study examined the effect of different temperatures on the cyclic fatigue of nickel-titanium rotary files. METHODS: Three groups of nickel-titanium rotary files (EF group [EdgeFile; EdgeEndo, Albuquerque, NM], VB group [Vortex Blue; Dentsply Tulsa Dental Specialties, Tulsa, OK], and ESX group [ESX; Brasseler USA, Savannah, GA]) of size 25 with a .04 taper and 25-mm length were tested in a metal block that simulated a canal curvature of 60° and a 5-mm radius curvature...
May 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28440890/fluorescence-and-autoradiographic-evaluation-of-tau-pet-ligand-pbb3-to-%C3%AE-synuclein-pathology
#19
Shunsuke Koga, Maiko Ono, Naruhiko Sahara, Makoto Higuchi, Dennis W Dickson
BACKGROUND: The tau PET ligand 2-((1E,3E)-4-(6-([(11) C]methylamino)pyridin-3-yl)buta-1,3-dienyl)benzo[d]thiazol-6-ol ([(11) C]PBB3) binds to a wide range of tau pathology; however, binding property of PBB3 to non-tau inclusions remains unknown. To clarify whether [(11) C]PBB3 binds to α-synuclein pathology, reactivity of PBB3 was assessed by in vitro fluorescence and autoradiographic labeling of brain sections from α-synucleinopathies patients. METHOD: Of 10 pure Lewy body disease and 120 multiple system atrophy (MSA) cases in the Mayo Clinic brain bank, we selected 3 Lewy body disease and 4 MSA cases with a range of α-synuclein severity based on the quantitative analysis of α-synuclein burden...
April 25, 2017: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/28437554/molecular-identification-of-cetaceans-from-the-west-atlantic-using-the-e3-i5-region-of-coi
#20
L H O Falcão, A S Campos, J E P Freitas, M A A Furtado-Neto, V V Faria
Molecular identification is very useful in cases where morphology-based species identification is not possible. Examples for its application in cetaceans include the identification of carcasses of stranded animals in advanced state of decomposition and body parts that are illegally traded. One DNA region that is often used for molecular identification is the Folmer region of the mitochondrial gene cytochrome c oxidase subunit I (COI) (locus 48 to 705 bp). This locus has been used for the identification of several animal species, including whales and dolphins...
April 20, 2017: Genetics and Molecular Research: GMR
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