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https://www.readbyqxmd.com/read/28823127/effects-of-feeding-corn-naturally-contaminated-with-aflatoxin-on-growth-performance-apparent-ileal-digestibility-serum-hormones-levels-and-gene-expression-of-na-k-atpase-in-ducklings
#1
Farzana Abbasi, Jingbo Liu, Hongfu Zhang, Xiaoyun Shen, Xuegang Luo
Objective: A 14-d trial was conducted to determine the effects of feeding corn naturally contaminated with aflatoxin B1 (AFB1) on growth performance, apparent ileal digestibility, serum hormones levels and gene expression of Na+, K+-ATPase in ducklings. Methods: A total of 704 ducklings were blocked on the basis of sex and body weight, and then allocated randomly to 1 of the following 2 treatments: 1) CON, basal diet and 2) AFB1, diets with 100% of normal corn replaced with AFB1 contaminated corn...
August 16, 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28823124/administration-of-vitamin-d%C3%A2-by-injection-or-drinking-water-alters-serum-25-hydroxycholecalciferol-concentrations-of-nursery-pigs
#2
Young Dal Jang, Jingyun Ma, Ning Lu, Jina Lim, H James Monegue, Robert L Stuart, Merlin Lindemann
Objective: Two experiments were conducted to evaluate vitamin D₃(VD₃) administration to nursery pigs by injection or in drinking water on serum 25-hydroxycholecalciferol (25-OHD₃) concentrations. Methods: At weaning, 51 pigs (27 and 24 pigs in experiments 1 and 2, respectively) were allotted to VD₃ treatments. Treatments in experiment 1 were: 1) control (CON), no vitamin administration beyond that in the diet, 2) intramuscular (i.m.) injection of 40,000 IU of VD₃ at weaning, and 3) water administration, 5,493 IU of VD₃/L drinking water for 14 d postweaning...
August 16, 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28822344/on-the-behavior-of-certain-ink-aging-curves
#3
Antonio A Cantú
This work treats writing inks, particularly ballpoint pen inks. It reviews those ink aging methods that are based on the analysis (measurement) of ink solvents (e.g., 2-phenoxyethanol, which is the most common among ballpoint pen inks). Each method involves measurements that are components of an ink aging parameter associated with the method. Only mass independent parameters are considered. An ink solvent from an ink that is on an air-exposed substrate will evaporate at a decreasing rate and is never constant as the ink ages...
July 19, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28821999/developmental-neurotoxicity-of-the-hippocampus-following-in-utero-exposure-to-methylmercury-impairment-in-cell-signaling
#4
Luana Heimfarth, Jeferson Delgado, Moara Rodrigues Mignori, Daniel Pens Gelain, José Cláudio Fonseca Moreira, Regina Pessoa-Pureur
In this study, we assessed some hippocampal signaling cascades and behavioral impairments in 30-day-old rat pups prenatally exposed to methylmercury (MeHg). Pregnant rats were exposed to 1.0 or 2.0 mg/kg MeHg by gavage in alternated days from gestational day 5 until parturition. We found increased anxiety-like and decreased exploration behavior evaluated by open field test and deficit of both short- and long-term memories by novel object recognition task, respectively, in MeHg-treated pups. Downregulated PI3K/Akt/mTOR pathway and activated/hypophosphorylated (Ser9) GSK3β in MeHg-treated pups could be upstream of hyperphosphorylated Tau (Ser396) destabilizing microtubules and contributing to neural dysfunction in the hippocampus of these rats...
August 18, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28821831/targeted-inhibition-of-rage-in-substantia-nigra-of-rats-blocks-6-ohda-induced-dopaminergic-denervation
#5
Juciano Gasparotto, Camila Tiefensee Ribeiro, Rafael Calixto Bortolin, Nauana Somensi, Thallita Kelly Rabelo, Alice Kunzler, Natália Cabral Souza, Matheus Augusto de Bittencourt Pasquali, José Claudio Fonseca Moreira, Daniel Pens Gelain
The receptor for advanced glycation endproducts (RAGE) is a pattern-recognition receptor associated with inflammation in most cell types. RAGE up-regulates the expression of proinflammatory mediators and its own expression via activation of NF-kB. Recent works have proposed a role for RAGE in Parkinson's disease (PD). In this study, we used the multimodal blocker of RAGE FPS-ZM1, which has become available recently, to selectively inhibit RAGE in the substantia nigra (SN) of rats intracranially injected with 6-hydroxydopamine (6-OHDA)...
August 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28821538/reflecting-on-graphs-attributes-of-graph-choice-and-construction-practices-in-biology
#6
Aakanksha Angra, Stephanie M Gardner
Undergraduate biology education reform aims to engage students in scientific practices such as experimental design, experimentation, and data analysis and communication. Graphs are ubiquitous in the biological sciences, and creating effective graphical representations involves quantitative and disciplinary concepts and skills. Past studies document student difficulties with graphing within the contexts of classroom or national assessments without evaluating student reasoning. Operating under the metarepresentational competence framework, we conducted think-aloud interviews to reveal differences in reasoning and graph quality between undergraduate biology students, graduate students, and professors in a pen-and-paper graphing task...
2017: CBE Life Sciences Education
https://www.readbyqxmd.com/read/28821404/rifm-fragrance-ingredient-safety-assessment-isoamyl-alcohol-cas-registry-number-123-51-3
#7
A M Api, D Belsito, D Botelho, D Browne, M Bruze, G A Burton, J Buschmann, M L Dagli, M Date, W Dekant, C Deodhar, A D Fryer, K Joshi, S La Cava, A Lapczynski, D C Liebler, D O'brien, R Parakhia, A Patel, T M Penning, G Ritacco, J Romine, D Salvito, T W Schultz, I G Sipes, Y Thakkar, Y Tokura, S Tsang, J Wahler
No abstract text is available yet for this article.
August 15, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28821067/optimization-of-high-purity-chitin-and-chitosan-production-from-illex-argentinus-pens-by-a-combination-of-enzymatic-and-chemical-processes
#8
José Antonio Vázquez, Diana Noriega, Patricia Ramos, Jesus Valcarcel, Ramon Novoa-Carballal, Lorenzo Pastrana, Rui L Reis, Ricardo I Pérez-Martín
The present report illustrates the optimisation of the experimental conditions for the chemical and enzymatic production of chitin and chitosan from Illex argentinus pen by-products. Optima conditions for chitin isolation were established at 0.82M NaOH/36.4°C, 57.5°C/pH=9.29, 59.6°C/pH=9.30 and 49.6°C/pH=5.91 for chemical, alcalase, esperase and neutrase deproteinization, respectively. Chitin samples were subsequently deacetylated by alkaline treatment reaching the highest degrees of deacetylation (DD>93%) at 61...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28818053/the-impact-of-self-interviews-on-response-patterns-for-sensitive-topics-a-randomized-trial-of-electronic-delivery-methods-for-a-sexual-behaviour-questionnaire-in-rural-south-africa
#9
Guy Harling, Dumile Gumede, Tinofa Mutevedzi, Nuala McGrath, Janet Seeley, Deenan Pillay, Till W Bärnighausen, Abraham J Herbst
BACKGROUND: Self-interviews, where the respondent rather than the interviewer enters answers to questions, have been proposed as a way to reduce social desirability bias associated with interviewer-led interviews. Computer-assisted self-interviews (CASI) are commonly proposed since the computer programme can guide respondents; however they require both language and computer literacy. We evaluated the feasibility and acceptability of using electronic methods to administer quantitative sexual behaviour questionnaires in the Somkhele demographic surveillance area (DSA) in rural KwaZulu-Natal, South Africa...
August 17, 2017: BMC Medical Research Methodology
https://www.readbyqxmd.com/read/28817864/tobacco-cessation-strategies-it-takes-a-village
#10
Debbie Anne Chiu Qua
Smoking is the leading cause of preventable death and chronic diseases in the U.S. Identifying smokers and providing appropriate intervention is therefore an integral part of each clinic visit. A combination of pharmacotherapy as well as behavioral counseling provides the best results. Pharmacotherapy includes nicotine replacement (patch, gum, lozenges), bupropion and varenicline. More recently, electronic nicotinic delivery systems (such as e-cigarettes, vaporizers/vape pens, and hookah pens) have become popular...
2017: South Dakota Medicine: the Journal of the South Dakota State Medical Association
https://www.readbyqxmd.com/read/28817555/notes-from-the-field-death-of-a-farm-worker-after-exposure-to-manure-gas-in-an-open-air-environment-wisconsin-august-2016
#11
John M Shutske, Rebecca A Larson, Daniel M Schaefer, Liz Y Binversie, Scott Rifleman, Cheryl Skjolaas
On August 15, 2016, at approximately 6:30 a.m., a previously healthy male employee of a Wisconsin beef farm was found dead near the edge of an outdoor 60,400 square foot (1.4 acre) manure storage basin (Figure). The basin was approximately 15 feet (4.6 meters) deep and nearly full. The victim, aged 29 years, was discovered by another worker; the coroner was notified at 6:50 a.m., and he pronounced the victim dead at the scene. Thirteen dead cattle were discovered in an adjoining pen; three others were struggling to stand and were euthanized...
August 18, 2017: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/28817229/performance-equivalency-between-computer-based-and-traditional-pen-and-paper-assessment-a-case-study-in-clinical-anatomy
#12
Bruno Guimarães, José Ribeiro, Bernardo Cruz, André Ferreira, Hélio Alves, Ricardo Cruz-Correia, Maria Dulce Madeira, Maria Amélia Ferreira
The time, material, and staff-consuming nature of anatomy's traditional pen-and-paper assessment system, the increase in the number of students enrolling in medical schools and the ever-escalating workload of academic staff have made the use of computer-based assessment (CBA) an attractive proposition. To understand the impact of such shift in the assessment method, an experimental study evaluating its effect on students' performance was designed. Additionally, students' opinions toward CBA were gathered. Second-year medical students attending a Clinical Anatomy course were randomized by clusters in two groups...
August 17, 2017: Anatomical Sciences Education
https://www.readbyqxmd.com/read/28816431/carbon-nanotubes-arranged-as-smart-interfaces-in-lipid-langmuir-blodgett-films-enhancing-the-enzymatic-properties-of-penicillinase-for-biosensing-applications
#13
Fabio Scholl, Paulo Morais, Rayla Gabriel, Michael J Schöning, Jose Roberto Siqueira, Luciano Caseli
In this paper, carbon nanotubes (CNTs) were incorporated in penicillinase-phospholipid Langmuir and Langmuir-Blodgett (LB) films to enhance the enzyme catalytic properties. Adsorption of the penicillinase and CNTs at dimyristoylphosphatidic acid (DMPA) monolayers at the air-water interface was investigated by surface pressure-area isotherms, vibrational spectroscopy and Brewster angle microscopy. The floating monolayers were transferred to solid supports through the LB technique, forming mixed DMPA-CNTs-PEN films, which were investigated by quartz crystal microbalance, vibrational spectroscopy, and atomic force microscopy...
August 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28816430/dual-colorimetric-and-fluorescent-authentication-based-on-semiconducting-polymer-dots-for-anti-counterfeiting-applications
#14
Wei-Kai Tsai, Yung-Sheng Lai, Po-Jung Tseng, Chia-Hsien Liao, Yang-Hsiang Chan
Semiconducting polymer dots (Pdots) have recently emerged as a novel type of ultrabright fluorescent probes that can be widely used in analytical sensing and material science. Here we developed a dual visual agents based on Pdots for anti-counterfeiting applications. We first designed and synthesized two types of photoswitchable Pdots by incorporating photochromic dyes with multi-color semiconducting polymers to modulate their emission intensities and wavelengths. The resulting full-color Pdot assays showed the colorimetric and fluorescent dual-readout abilities to serve as an anti-counterfeiting reagent with low background interference...
August 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28816222/an-outlier-in-public-health-history-in-india-a-t-w-simeons-s-scheme-for-rural-medical-relief-kolhapur-1943-47
#15
Shubhada Pandya
It is customary to date provision of health services in rural India to the Report of the Bhore Committee (1946) and its descendants. It is presumed that in pre-Bhore India (the last half-century of the British era) the rural public health scenario was devoid of discerning commentators and practical effort. The presumption is misleading. Historical material shows that attempts, official and non-official, to improve rural environments and attend to the health problems of villagers were not wanting. Such efforts followed two main, sometimes intersecting, streams, namely sanitation and medical relief...
March 2017: National Medical Journal of India
https://www.readbyqxmd.com/read/28814151/long-term-care-service-trajectories-and-their-predictors-for-persons-living-with-dementia-results-from-a-canadian-study
#16
Denise S Cloutier, Margaret J Penning, Kim Nuernberger, Deanne Taylor, Stuart MacDonald
OBJECTIVE: We used latent transition analysis to explore common long-term care (LTC) service trajectories and their predictors for older adults with dementia. METHOD: Using linked administrative data collected over a 4-year interval (2008-2011), the study sample included 3,541 older persons with dementia who were clients of publicly funded LTC in British Columbia, Canada. RESULTS: Our results revealed relatively equal reliance on home care (HC) and facility-based residential care (RC) as starting points...
August 1, 2017: Journal of Aging and Health
https://www.readbyqxmd.com/read/28813944/robotic-set-up-to-quantify-hand-eye-behavior-in-motor-execution-and-learning-of-children-with-autism-spectrum-disorder
#17
Claudia Casellato, Marta Gandolla, Alessandro Crippa, Alessandra Pedrocchi
Autism spectrum disorder (ASD) is a multifaceted neurodevelopmental disorder characterized by a persistence of social and communication impairment, and restricted and repetitive behaviors. However, motor disorders have also been described, but not objectively assessed. Most studies showed inefficient eye-hand coordination and motor learning in children with ASD; in other experiments, mechanisms of acquisition of internal models in self-generated movements appeared to be normal in autism. In this framework, we have developed a robotic protocol, recording gaze and hand data during upper limb tasks, in which a haptic pen-like handle is moved along specific trajectories displayed on the screen...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28811154/theoretical-study-on-electron-structure-and-charge-transport-properties-of-tetraazapentacene-derivatives
#18
Xiao-Dan Tang
By Means of Marcus electron transfer theory, the charge transport properties of tetraazapentacene (4N-PEN) derivatives were systematically explored. The reorganization energies were studied by both adiabatic potential-energy surfaces and normal mode analysis. The charge diffusion constants were evaluated from the random walk simulation. From the perspective of homology modeling, a selected 4N-PEN derivative without experimental crystal structure was built into three kinds of possible packing modes with reference to its relative analogues and then fully optimized...
June 23, 2017: Journal of Molecular Graphics & Modelling
https://www.readbyqxmd.com/read/28810853/acute-effects-of-reducing-sitting-time-in-adolescents-a-randomized-cross-over-study
#19
Anisse Penning, Anthony D Okely, Stewart G Trost, Jo Salmon, Dylan P Cliff, Marijka Batterham, Steven Howard, Anne-Maree Parrish
BACKGROUND: Levels of sitting among adolescents are high, especially during the school day. The acute cognitive and health consequences associated with prolonged sitting are poorly understood in adolescents. This randomized crossover design study examined the acute effects of a simulated school day with reduced sitting or usual sitting on adolescents' cognitive function and cardiometabolic biomarkers. METHODS: Eighteen healthy school aged adolescents were recruited from the community to the study (11 males; 7 females; mean age [SD] = 13...
August 15, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28807547/gas-chromatography-mass-spectrometry-and-high-performance-liquid-chromatography-diode-array-detection-for-dating-of-paper-ink
#20
Oscar Díaz-Santana, Daura Vega-Moreno, Francisco Conde-Hardisson
An extraction and determination method is shown for the analysis of dyes and solvents present in two types of ballpoint pen inks that are deposited onto paper. Ink extracts are analysed using a combination of gas chromatography with mass spectrometry (GC-MS), and high-pressure liquid chromatography with photodiode array detection (HPLC-DAD), within a single sample extraction procedure. Seventeen solvents and thirteen dyes contained in two Montblanc(®) inks (black and blue) were monitored for 45 months at monthly intervals, in order to determine variations in the concentrations of the compounds over time...
August 1, 2017: Journal of Chromatography. A
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