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https://www.readbyqxmd.com/read/28676297/inferring-synaptic-excitation-inhibition-balance-from-field-potentials
#1
Richard Gao, Erik J Peterson, Bradley Voytek
Neural circuits sit in a dynamic balance between excitation (E) and inhibition (I). Fluctuations in E:I balance have been shown to influence neural computation, working memory, and information flow, while more drastic shifts and aberrant E:I patterns are implicated in numerous neurological and psychiatric disorders. Current methods for measuring E:I dynamics require invasive procedures that are difficult to perform in behaving animals, and nearly impossible in humans. This has limited the ability to examine the full impact that E:I shifts have in cognition and disease...
July 1, 2017: NeuroImage
https://www.readbyqxmd.com/read/28675250/effects-of-different-rest-stop-durations-at-control-posts-during-a-long-journey-on-the-welfare-of-sheep
#2
Stefano Messori, Cecilia Pedernera-Romano, Pedro Rodriguez, Shanis Barnard, Daniele Giansante, Diego Magnani, Antoni Dalmau, Antonio Velarde, Paolo Dalla Villa
All livestock transport within the European Union must comply with the EC Regulation 1÷2005. For sheep, this law prescribes a maximum journey of 29 hours after which animals must rest in control posts (CP) for 24 hours before further transportation. However, there is no scientific evidence de ning the effects of di erent stop duration on sheep recovery during long journeys. The aim of this study was to assess if a shorter stop could be provided without impairing ewes' welfare. Ninety-six adult ewes were divided into 4 homogenous groups...
June 30, 2017: Veterinaria Italiana
https://www.readbyqxmd.com/read/28669255/a-simple-and-inexpensive-way-to-document-simple-husbandry-in-animal-care-facilities-using-qr-code-scanning
#3
Tyler Green, Terry Smith, Richard Hodges, W Mark Fry
Record keeping within research animal care facilities is a key part of the guidelines set forth by national regulatory bodies and mandated by federal laws. Research facilities must maintain records of animal health issues, procedures and usage. Facilities are also required to maintain records regarding regular husbandry such as general animal checks, feeding and watering. The level of record keeping has the potential to generate excessive amounts of paper which must be retained in a fashion as to be accessible...
January 1, 2017: Laboratory Animals
https://www.readbyqxmd.com/read/28649473/focus-expansion-and-stability-of-the-spread-parameter-estimate-of-the-power-law-model-for-dispersal-gradients
#4
Peter S Ojiambo, David H Gent, Lucky K Mehra, David Christie, Roger Magarey
Empirical and mechanistic modeling indicate that pathogens transmitted via aerially dispersed inoculum follow a power law, resulting in dispersive epidemic waves. The spread parameter (b) of the power law model, which is an indicator of the distance of the epidemic wave front from an initial focus per unit time, has been found to be approximately 2 for several animal and plant diseases over a wide range of spatial scales under conditions favorable for disease spread. Although disease spread and epidemic expansion can be influenced by several factors, the stability of the parameter b over multiple epidemic years has not been determined...
2017: PeerJ
https://www.readbyqxmd.com/read/28631623/morphological-self-stabilization-of-locomotion-gaits-illustration-on-a-few-examples-from-bio-inspired-locomotion
#5
Christine Chevallereau, Frédéric Boyer, Mathieu Porez, Johan Mauny, Yannick Aoustin
To a large extent, robotics locomotion can be viewed as cyclic motions, named gaits. Due to the high complexity of the locomotion dynamics, to find the control laws that ensure an expected gait and its stability with respect to external perturbations, is a challenging issue for feedback control. To address this issue, a promising way is to take inspiration from animals that intensively exploit the interactions of the passive degrees of freedom of their body with their physical surroundings, to outsource the high-level exteroceptive feedback control to low-level proprioceptive ones...
June 20, 2017: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/28626749/a-century-spent-combating-rabies-in-morocco-1911-2015-how-much-longer
#6
Sami Darkaoui, Florence Cliquet, Marine Wasniewski, Emmanuelle Robardet, Nadia Aboulfidaa, Mohammed Bouslikhane, Ouafaa Fassi-Fihri
Rabies has no known beginning in Morocco and to date, government control efforts and plans fail to eradicate the disease. A review and analysis of available epidemiological data are crucial to learn lessons from the past and to propose effective actions. Legally, animal rabies is a notifiable disease since 1913 and legislation has been updated periodically since. Dogs have always been considered as both the disease's vector and reservoir, while cattle, other herbivores, and humans are victims. Animal rabies cases evolution from 1942 to 2015 is characterized by ascending phase then decreasing one following structured rabies control plan implementation in 1980s...
2017: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/28615133/platelet-rich-plasma-with-keratinocytes-and-fibroblasts-enhance-healing-of-full-thickness-wounds
#7
Jia Xian Law, Shiplu Roy Chowdhury, Aminuddin Bin Saim, Ruszymah Bt Hj Idrus
Advances in tissue engineering led to the development of various tissue-engineered skin substitutes (TESS) for the treatment of skin injuries. The majority of the autologous TESS required lengthy and costly cell expansion process to fabricate. In this study, we determine the possibility of using a low density of human skin cells suspended in platelet-rich plasma (PRP)-enriched medium to promote the healing of full-thickness skin wounds. To achieve this, full-thickness wounds of size 1.767 cm(2) were created at the dorsum part of nude mice and treated with keratinocytes (2 × 10(4) cells/cm(2)) and fibroblasts (3 × 10(4) cells/cm(2)) suspended in 10% PRP-enriched medium...
June 7, 2017: Journal of Tissue Viability
https://www.readbyqxmd.com/read/28571799/human-body-may-produce-bacteria
#8
Alen J Salerian
"Human body may produce bacteria" proposes that human body may produce bacteria and represent an independent source of infections contrary to the current paradigm of infectious disorders proposed by Louis Pasteur in 1880. The following observations are consistent with this hypothesis: A. Bidirectional transformations of both living and nonliving things have been commonly observed in nature. B. Complex multicellular organisms harbor the necessary properties to produce bacteria (water, nitrogen and oxygen). C...
June 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/28570267/allergen-encoding-bone-marrow-transfer-inactivates-allergic-t-cell-responses-alleviating-airway-inflammation
#9
Jane Al-Kouba, Andrew N Wilkinson, Malcolm R Starkey, Rajeev Rudraraju, Rhiannon B Werder, Xiao Liu, Soi-Cheng Law, Jay C Horvat, Jeremy F Brooks, Geoffrey R Hill, Janet M Davies, Simon Phipps, Philip M Hansbro, Raymond J Steptoe
Memory Th2 cell responses underlie the development and perpetuation of allergic diseases. Because these states result from immune dysregulation, established Th2 cell responses represent a significant challenge for conventional immunotherapies. New approaches that overcome the detrimental effects of immune dysregulation are required. We tested whether memory Th2 cell responses were silenced using a therapeutic approach where allergen expression in DCs is transferred to sensitized recipients using BM cells as a vector for therapeutic gene transfer...
June 2, 2017: JCI Insight
https://www.readbyqxmd.com/read/28556414/dynamic-compression-of-human-and-ovine-meniscal-tissue-compared-to-a-potential-thermoplastic-elastomer-hydrogel-replacement
#10
Kristine M Fischenich, Katie Boncella, Jackson T Lewis, Travis S Bailey, Tammy L Haut Donahue
Understanding how human meniscal tissue responds to loading regimes mimetic of daily life as well as how it compares to larger animal models is critical in the development of a functionally accurate synthetic surrogate. Seven human and 8 ovine cadaveric meniscal specimens were regionally sectioned into cylinders 5mm in diameter and 3 mm thick along with 10 polystyrene-b-polyethylene oxide block copolymer-based thermoplastic elastomer (TPE) hydrogels. Samples were compressed to 12% strain at 1 Hz for 5000 cycles, unloaded for 24 hours, and then retested...
May 27, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28516389/microenvironmental-scenario-of-the-bone-marrow-of-inorganic-arsenic-exposed-experimental-mice
#11
Jacintha Archana Pereira, Sujata Law
Exposure to arsenic on a regular basis, mainly through drinking water, agricultural pesticide, and sometimes therapeutic dose, results in various diseases of different tissues including the bone marrow hematopoietic system. Hematopoiesis is a dynamic process by which bone marrow (BM) hematopoietic stem/progenitor cells (HSPCs) generate a relatively constant pool of functionally mature blood cells by the support of microenvironmental components. The present study has been aimed to understand stem cell microenvironmental status during arsenic toxicity and the consequent reflection of dysregulation involving the hematopoietic machinery in experimental mice...
May 17, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28507824/non-invasive-radiofrequency-field-treatment-to-produce-hepatic-hyperthermia-efficacy-and-safety-in-swine
#12
Jason C Ho, Lam Nguyen, Justin J Law, Matthew J Ware, V Keshishian, N C Lara, Trac Nguyen, Steven A Curley, Stuart J Corr
The Kanzius non-invasive radio-frequency hyperthermia system (KNiRFH) has been investigated as a treatment option for hepatic hyperthermia cancer therapy. The treatment involves exposing the patient to an external high-power RF (13.56 MHz) electric field, whereby the propagating waves penetrate deep into the tumor causing targeted heating based on differential tissue dielectric properties. However, a comprehensive examination of the Kanzius system alongside any associated toxicities and its ability to induce hepatic hyperthermia in larger animal models, such as swine, are the subjects of the work herein...
2017: IEEE Journal of Translational Engineering in Health and Medicine
https://www.readbyqxmd.com/read/28506903/ethnozoological-assessment-of-animals-used-by-mon-traditional-medicine-vendors-at-kyaiktiyo-myanmar
#13
Vincent Nijman, Chris R Shepherd
ETHNOPHARMACOLOGICAL RELEVANCE: Wild animals are widely used in traditional Asian medicine but information from Myanmar is lacking. We show that a wide range of animals are used at a pilgrimage site, mostly for their rendered fats and oils to be used in mixed concoctions. The majority of species were sold to be used to treat aching joints, muscle ache and skin diseases. AIM OF THE STUDY: To assess wildlife for sale for medicinal purposes, and document their medicinal use at Kyaiktiyo, a pilgrimage site at a 1100m tall mountain, with many of the pilgrims climbing to the top...
July 12, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28505817/fractal-dimension-and-universality-in-avascular-tumor-growth
#14
Fabiano L Ribeiro, Renato Vieira Dos Santos, Angélica S Mata
For years, the comprehension of the tumor growth process has been intriguing scientists. New research has been constantly required to better understand the complexity of this phenomenon. In this paper, we propose a mathematical model that describes the properties, already known empirically, of avascular tumor growth. We present, from an individual-level (microscopic) framework, an explanation of some phenomenological (macroscopic) aspects of tumors, such as their spatial form and the way they develop. Our approach is based on competitive interaction between the cells...
April 2017: Physical Review. E
https://www.readbyqxmd.com/read/28494263/zipf-s-law-of-abbreviation-and-the-principle-of-least-effort-language-users-optimise-a-miniature-lexicon-for-efficient-communication
#15
Jasmeen Kanwal, Kenny Smith, Jennifer Culbertson, Simon Kirby
The linguist George Kingsley Zipf made a now classic observation about the relationship between a word's length and its frequency; the more frequent a word is, the shorter it tends to be. He claimed that this "Law of Abbreviation" is a universal structural property of language. The Law of Abbreviation has since been documented in a wide range of human languages, and extended to animal communication systems and even computer programming languages. Zipf hypothesised that this universal design feature arises as a result of individuals optimising form-meaning mappings under competing pressures to communicate accurately but also efficiently-his famous Principle of Least Effort...
August 2017: Cognition
https://www.readbyqxmd.com/read/28490143/method-for-sampling-and-analysis-of-volatile-biomarkers-in-process-gas-from-aerobic-digestion-of-poultry-carcasses-using-time-weighted-average-spme-and-gc-ms
#16
Jacek A Koziel, Lam T Nguyen, Thomas D Glanville, Heekwon Ahn, Timothy S Frana, J Hans van Leeuwen
A passive sampling method, using retracted solid-phase microextraction (SPME) - gas chromatography-mass spectrometry and time-weighted averaging, was developed and validated for tracking marker volatile organic compounds (VOCs) emitted during aerobic digestion of biohazardous animal tissue. The retracted SPME configuration protects the fragile fiber from buffeting by the process gas stream, and it requires less equipment and is potentially more biosecure than conventional active sampling methods. VOC concentrations predicted via a model based on Fick's first law of diffusion were within 6...
October 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28456853/cultured-meat-in-islamic-perspective
#17
Mohammad Naqib Hamdan, Mark J Post, Mohd Anuar Ramli, Amin Rukaini Mustafa
Cultured meat is a promising product that is derived through biotechnology that partially circumvents animal physiology, thereby being potentially more sustainable, environmentally friendly and animal friendly than traditional livestock meat. Such a novel technology that can impact many consumers evokes ethical, philosophical and religious discussions. For the Islamic community, the crucial question is whether cultured meat is halal, meaning compliant with Islamic laws. Since the culturing of meat is a new discovery, invention and innovation by scientists that has never been discussed by classical jurists (fuqaha'), an ijtihad by contemporary jurists must look for and provide answers for every technology introduced, whether it comply the requirements of Islamic law or not...
April 29, 2017: Journal of Religion and Health
https://www.readbyqxmd.com/read/28444189/environmental-enrichment-in-the-21st-century
#18
Kristine Coleman, Melinda A Novak
More than a quarter of a century has elapsed since the Animal Welfare Act mandated that research facilities develop and follow a plan to promote the psychological well-being of captive primates. Since passage of this law, considerable effort and resources have been directed to designing environmental enrichment strategies in an effort to improve animal welfare. These plans typically consist of environmental enrichment and socialization efforts. While environmental enhancement has undergone a great deal of improvement in the past 25 years, it should be viewed as a continual work in progress, which takes advantage of emergent and future technologies...
April 21, 2017: ILAR Journal
https://www.readbyqxmd.com/read/28436493/an-attenuated-mycobacterium-tuberculosis-clinical-strain-with-a-defect-in-esx-1-secretion-induces-minimal-host-immune-responses-and-pathology
#19
Helena Strand Clemmensen, Niels Peter Hell Knudsen, Erik Michael Rasmussen, Jessica Winkler, Ida Rosenkrands, Ahmad Ahmad, Troels Lillebaek, David R Sherman, Peter Lawætz Andersen, Claus Aagaard
Although Mycobacterium tuberculosis (M.tb) DK9897 is an attenuated strain, it was isolated from a patient with extrapulmonary tuberculosis and vaccination with a subunit vaccine (H56) induced poor protection against it. Both attenuation and lack of protection are because M.tb DK9897 cannot secrete the EsxA virulence factor nor induce a host response against it. Genome sequencing identified a frameshift mutation in the eccCa1 gene. Since the encoded EccCa1 protein provides energy for ESX-1 secretion, it suggested a defect in the ESX-1 type VII secretion system...
April 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28423644/disulfide-bond-disrupting-agents-activate-the-unfolded-protein-response-in-egfr-and-her2-positive-breast-tumor-cells
#20
Renan B Ferreira, Mengxiong Wang, Mary E Law, Bradley J Davis, Ashton N Bartley, Paul J Higgins, Michael S Kilberg, Katherine E Santostefano, Naohiro Terada, Coy D Heldermon, Ronald K Castellano, Brian K Law
Many breast cancer deaths result from tumors acquiring resistance to available therapies. Thus, new therapeutic agents are needed for targeting drug-resistant breast cancers. Drug-refractory breast cancers include HER2+ tumors that have acquired resistance to HER2-targeted antibodies and kinase inhibitors, and "Triple-Negative" Breast Cancers (TNBCs) that lack the therapeutic targets Estrogen Receptor, Progesterone Receptor, and HER2. A significant fraction of TNBCs overexpress the HER2 family member Epidermal Growth Factor Receptor (EGFR)...
April 25, 2017: Oncotarget
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