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https://www.readbyqxmd.com/read/28447151/rhythms-in-the-endocrine-system-of-fish-a-review
#1
REVIEW
Mairi Cowan, Clara Azpeleta, Jose Fernando López-Olmeda
The environment which living organisms inhabit is not constant and many factors, such as light, temperature, and food availability, display cyclic and predictable variations. To adapt to these cyclic changes, animals present biological rhythms in many of their physiological variables, timing their functions to occur when the possibility of success is greatest. Among these variables, many endocrine factors have been described as displaying rhythms in vertebrates. The aim of the present review is to provide a thorough review of the existing knowledge on the rhythms of the endocrine system of fish by examining the hormones that show rhythmicity, how environmental factors control these rhythms and the variation in the responses of the endocrine system depending on the time of the day...
April 26, 2017: Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
https://www.readbyqxmd.com/read/28431947/a-bout-analysis-of-operant-response-disruption
#2
REVIEW
Ryan J Brackney, Timothy H Cheung, Federico Sanabria
Operant behavior appears to be organized in bouts of responses, whose parameters are differentially sensitive to various manipulations. This study investigated potential differential effects of three forms of operant response disruption-extinction (EXT), non-contingent reinforcement (NCR), and prefeeding (PRE)-on response bouts. In Experiment 1, Wistar Kyoto rats (WKY) were trained on a tandem variable-time (VT) 120s fixed-ratio (FR) 5 schedule of reinforcement; after stability was established, their responding was disrupted for three sessions with one of the three disrupters (EXT, NCR, or PRE)...
April 18, 2017: Behavioural Processes
https://www.readbyqxmd.com/read/28431883/primary-repair-of-traumatic-distal-biceps-ruptures-in-a-military-population-clinical-outcomes-of-single-versus-2-incision-technique
#3
Brian R Waterman, Lorenzo Navarro-Figueroa, Brett D Owens
PURPOSE: To determine the success of distal biceps repair in a high-demand military population and to comparatively evaluate the perioperative risk profile, functional results, and adverse patient outcomes of a single- versus 2-incision technique within this high-risk group. METHODS: Between 2007-2013, all military service members undergoing primary surgical repair for distal biceps rupture through the Military Health System were isolated. Patients with allograft tendon reconstruction, revision procedures, nonmilitary status, and/or follow-up of less than 24 month were excluded...
April 18, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28411387/prophylactic-dissection-of-level-v-in-primary-mucosal-scc-in-the-clinically-n-positive-neck-a-systematic-review
#4
REVIEW
Timothy McLean, Stephen J Kerr, Charles E B Giddings
OBJECTIVE: To review the evidence for level V dissection in the management of previously untreated mucosal squamous cell carcinoma (SCC) of the head and neck presenting with nodal metastasis when level V is clinically uninvolved. DATA SOURCE: The Preferred Reporting Items for Systematic Review and Meta-Analyses (PRISMA) were used to conduct a systematic review of the current literature, including all English language articles published after 1990. A literature search was performed on November 29, 2015, of Medline, EMBASE, Cumulative Index to Nursing and Allied Health Literature (CINAHL), and the Cochrane Library...
April 14, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28409444/locally-invasive-thyroid-cancer-options-for-a-treatment
#5
Nicola Avenia, Jacopo Vannucci, Massimo Monacelli, Andrea Polistena, Francesco Puma
Local invasion to neighbor organs by thyroid cancer is an important prognosticator and requires different therapeutic approach. Which one is the possible best treatment option and results are evaluated in this study. A single-institution experience in thyroid cancer invading the airway is evaluated retrospectively (1990-2016). Facts regarding patients' demographics, disease history, comorbidities, condition at first evaluation and reason for referral are analyzed. Hospital records and treatment details are extracted from charts and Institutional folders...
April 13, 2017: Updates in Surgery
https://www.readbyqxmd.com/read/28387524/a-new-adaptive-time-step-method-for-unsteady-flow-simulations-in-a-human-lung
#6
Ana Fenández-Tena, Alfonso C Marcos, Cristina Martínez, D Keith Walters
The innovation presented is a method for adaptive time-stepping that allows clustering of time steps in portions of the cycle for which flow variables are rapidly changing, based on the concept of using a uniform step in a relevant dependent variable rather than a uniform step in the independent variable time. A user-defined function was developed to adapt the magnitude of the time step (adaptive time step) to a defined rate of change in inlet velocity. Quantitative comparison indicates that the new adaptive time stepping method significantly improves accuracy for simulations using an equivalent number of time steps per cycle...
April 7, 2017: Computer Methods in Biomechanics and Biomedical Engineering
https://www.readbyqxmd.com/read/28380780/controlling-periodic-ripple-microstructure-formation-on-4h-sic-crystal-with-three-time-delayed-femtosecond-laser-beams-of-different-linear-polarizations
#7
Wanlin He, Jianjun Yang, Chunlei Guo
The control of laser-induced periodic ripple microstructures on 4H-SiC crystal surface is studied using temporally delayed collinear three femtosecond laser pulse trains linearly polarized in different directions. The ripple orientation appears to develop independent of the individual laser polarizations and exhibits non-monotonical change with variable time delays, whose variation tendency is also affected by the polarization intersection angles. Remarkably, the ripple period is observed to transfer from high- to low-spatial-frequency regions, accompanied by distinctly improved morphological uniformity and clearness...
March 6, 2017: Optics Express
https://www.readbyqxmd.com/read/28380158/leadership-practices-in-hospital-nursing-a-self-of-manager-nurses
#8
Vânea Lúcia Dos Santos Silva, Silvia Helena Henriques Camelo, Mirelle Inácio Soares, Zélia Marilda Rodrigues Resck, Lucieli Dias Pedreschi Chaves, Fabiana Cristina Dos Santos, Laura Andrian Leal
OBJECTIVE: To assess the frequency of the leadership practices performed by the manager nurses of hospital institutions and their association with the variables of the socioprofessional profile. METHOD: Cross-sectional, descriptive, correlational study conducted in four hospitals in a city of the state of São Paulo. A sociodemographic questionnaire and the instrument Leadership Practices Inventory were used. Data collection and analysis were based on an exemplary Leadership Practices Model...
April 3, 2017: Revista da Escola de Enfermagem da U S P
https://www.readbyqxmd.com/read/28372168/floral-parts-of-gomphrena-globosa-l-as-a-novel-alternative-source-of-betacyanins-optimization-of-the-extraction-using-response-surface-methodology
#9
Custódio Lobo Roriz, Lillian Barros, M A Prieto, Patricia Morales, Isabel C F R Ferreira
The present study describes a novel mechanical process for the pigmented parts of Gomphrena globosa L. The effects of the variables of the maceration extraction of betacyanins have not been properly described. Therefore, this study also aims to optimize the conditions that maximize betacyanins extraction from G. globosa as an alternative source. Assisted by response surface methodology, an experimental design was developed for testing the extraction variables (time, temperature, ethanol-water proportion and solid-liquid ratio)...
August 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28362762/phase-noise-analysis-of-swept-source-optical-coherence-tomography-systems
#10
Yuye Ling, Yu Gan, Xinwen Yao, Christine P Hendon
We propose a new model to characterize the phase noise in swept-source optical coherence tomography (SS-OCT). The new model explicitly incorporates scanning variability, timing jitter, and sample location in addition to intensity noise (shot noise). The model was analyzed and validated by using both Monte Carlo methods and experiments. We suggest that the proposed model can be used as a guideline for future SS-OCT experimental designs.
April 1, 2017: Optics Letters
https://www.readbyqxmd.com/read/28351674/a-simple-approach-to-measure-transmissibility-and-forecast-incidence
#11
Pierre Nouvellet, Anne Cori, Tini Garske, Isobel M Blake, Ilaria Dorigatti, Wes Hinsley, Thibaut Jombart, Harriet L Mills, Gemma Nedjati-Gilani, Maria D Van Kerkhove, Christophe Fraser, Christl A Donnelly, Neil M Ferguson, Steven Riley
Outbreaks of novel pathogens such as SARS, pandemic influenza and Ebola require substantial investments in reactive interventions, with consequent implementation plans sometimes revised on a weekly basis. Therefore, short-term forecasts of incidence are often of high priority. In light of the recent Ebola epidemic in West Africa, a forecasting exercise was convened by a network of infectious disease modellers. The challenge was to forecast unseen "future" simulated data for four different scenarios at five different time points...
February 24, 2017: Epidemics
https://www.readbyqxmd.com/read/28351227/early-dynamic-positron-emission-tomography-pet-computed-tomography-and-pet-angiography-for-endoleak-detection-after-abdominal-endovascular-aneurysm-repair
#12
Robert Drescher, Falk Gühne, Martin Freesmeyer
PURPOSE: To propose a positron emission tomography (PET)/computed tomography (CT) protocol including early-dynamic and late-phase acquisitions to evaluate graft patency and aneurysm diameter, detect endoleaks, and rule out graft or vessel wall inflammation after endovascular aneurysm repair (EVAR) in one examination without intravenous contrast medium. TECHNIQUE: Early-dynamic PET/CT of the endovascular prosthesis is performed for 180 seconds immediately after intravenous injection of F-18-fluorodeoxyglucose...
March 1, 2017: Journal of Endovascular Therapy
https://www.readbyqxmd.com/read/28349011/late-onset-hydrocephalus-in-children-with-tuberculous-meningitis
#13
Disha Sharma, Ira Shah, Sharad Patel
Hydrocephalus is a known complication of tuberculous meningitis (TBM). It is almost always present in patients who have had the disease for four to six weeks. However, hydrocephalus can also develop later in the disease course as seen in our 3 patients. All 3 patients had multi-drug resistant (MDR) tuberculosis (TB) and developed hydrocephalus after variable time after starting second line anti-tuberculous therapy (ATT). A 7 years old girl had hydrocephalus at onset of TBM and was shunted but the hydrocephalus increased in size after 6 months of being on second line ATT in spite of a patent ventricular peritoneal (VP) shunt...
October 2016: Journal of Family Medicine and Primary Care
https://www.readbyqxmd.com/read/28346956/early-nephrectomy-in-unilateral-multicystic-dysplastic-kidney-in-children-cures-hypertension-early-an-observation
#14
Basant Kumar, Vijai Datta Upadhyaya, Manish Kumar Gupta, Laxmi Kant Bharti, Ram Nawal Rao, Sheo Kumar
Objective Surgery is still indicated as the treatment of choice in subset of patients with unilateral multicystic dysplastic kidney (UMCDK) because of its potential complications and malignant change. The purpose of this study is to present our observation that early nephrectomy may cure hypertension early in children with UMCDK and review the literature. Materials and Methods We report here four children (two males and two females) with antenatally diagnosed UMCDK with hypertension, treated in the past 4 years...
March 27, 2017: European Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/28334187/individual-differences-in-human-auditory-processing-insights-from-single-trial-auditory-midbrain-activity-in-an-animal-model
#15
Travis White-Schwoch, Trent Nicol, Catherine M Warrier, Daniel A Abrams, Nina Kraus
Auditory-evoked potentials are classically defined as the summations of synchronous firing along the auditory neuraxis. Converging evidence supports a model whereby timing jitter in neural coding compromises listening and causes variable scalp-recorded potentials. Yet the intrinsic noise of human scalp recordings precludes a full understanding of the biological origins of individual differences in listening skills. To delineate the mechanisms contributing to these phenomena, in vivo extracellular activity was recorded from inferior colliculus in guinea pigs to speech in quiet and noise...
October 5, 2016: Cerebral Cortex
https://www.readbyqxmd.com/read/28327492/pet-therapy-an-effective-strategy-to-care-for-the-elderly-an-experimental-study-in-a-nursing-home
#16
Alfonso Sollami, Elisa Gianferrari, Manuela Alfieri, Giovanna Artioli, Chiara Taffurelli
BACKGROUND AND AIM: There has recently been a growing interest towards patients' affective and emotional needs, especially in relational therapies, which are considered vital as to increase the understanding of those needs and patients' well-being. In particular, we paid attention to those patients who are forced to spend the last phase of their existence in residential facilities, namely elderly people in nursing homes, who often feel marginalized, useless, depressed, unstimulated or unable to communicate...
March 14, 2017: Acta Bio-medica: Atenei Parmensis
https://www.readbyqxmd.com/read/28306724/respiratory-dna-viruses-are-undetectable-in-nasopharyngeal-secretions-from-adenotonsillectomized-children
#17
Ronaldo Bragança Martins, Lucas Penna Rocha, Mirela Moreira Prates, Talita Bianca Gagliardi, Balduino Biasoli, Marcelo Junqueira Leite, Guilherme Buzatto, Miguel Angelo Hyppolito, Davi Casale Aragon, Edwin Tamashiro, Fabiana Cardoso Pereira Valera, Eurico Arruda, Wilma Terezinha Anselmo-Lima
Respiratory viruses are frequently detected in association with chronic tonsillar hypertrophy in the absence of symptoms of acute respiratory infection (ARI). The present analysis was done in follow-up to a previous clinical study done by this same group. Nasopharyngeal washes (NPWs) were obtained from 83 of 120 individuals at variable times post adenotonsillectomy, in the absence of ARI symptoms. A look back at virus detection results in NPWs from the same 83 individuals at the time of tonsillectomy revealed that 73...
2017: PloS One
https://www.readbyqxmd.com/read/28279660/validity-of-the-instrumented-push-and-release-test-to-quantify-postural-responses-in-persons-with-multiple-sclerosis
#18
Mahmoud El-Gohary, Daniel Peterson, Geetanjali Gera, Fay B Horak, Jessie M Huisinga
OBJECTIVE: To test the validity of wearable inertial sensors to provide objective measures of postural stepping responses to the Push and Release clinical test in people with multiple sclerosis DESIGN: Cross-sectional SETTING: University medical center balance disorders laboratory PARTICIPANTS: 52 PwMS and 21 age-matched healthy controls MAIN OUTCOME MEASURES: stepping latency, time and number of steps required to reach stability, and initial step length were calculated from three inertial measurement units placed on participants' lumbar spine and feet...
March 6, 2017: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28239905/estimators-for-longitudinal-latent-exposure-models-examining-measurement-model-assumptions
#19
Brisa N Sánchez, Sehee Kim, Mary D Sammel
Latent variable (LV) models are increasingly being used in environmental epidemiology as a way to summarize multiple environmental exposures and thus minimize statistical concerns that arise in multiple regression. LV models may be especially useful when multivariate exposures are collected repeatedly over time. LV models can accommodate a variety of assumptions but, at the same time, present the user with many choices for model specification particularly in the case of exposure data collected repeatedly over time...
February 27, 2017: Statistics in Medicine
https://www.readbyqxmd.com/read/28195515/targeting-cell-adhesion-molecules-with-nanoparticles-using-in%C3%A2-vivo-and-flow-based-in%C3%A2-vitro-models-of-atherosclerosis
#20
Khosrow Khodabandehlou, Jacqueline J Masehi-Lano, Christopher Poon, Jonathan Wang, Eun Ji Chung
Atherosclerosis is a leading cause of death worldwide; in addition to lipid dysfunction, chronic arterial wall inflammation is a key component of atherosclerosis. Techniques that target cell adhesion molecules, which are overexpressed during inflammation, are effective methods to detect and treat atherosclerosis. Specifically, research groups have identified vascular cell adhesion molecule-1, intercellular adhesion molecule-1, platelet endothelial cell adhesion molecule, and selectins (E-selectin and P-selectin) as correlated to atherogenesis...
April 2017: Experimental Biology and Medicine
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