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https://www.readbyqxmd.com/read/28631623/morphological-self-stabilization-of-locomotion-gaits-illustration-on-a-few-examples-from-bio-inspired-locomotion
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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...
May 12, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28505817/fractal-dimension-and-universality-in-avascular-tumor-growth
#10
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
#11
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
#12
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
#13
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
#14
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
#15
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
#16
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
https://www.readbyqxmd.com/read/28414619/how-the-nerves-reached-the-muscle-bernard-katz-stephen-w-kuffler-and-john-c-eccles-certain-implications-of-exile-for-the-development-of-twentieth-century-neurophysiology
#17
Frank W Stahnisch
This article explores the work by Bernard Katz (1911-2003), Stephen W. Kuffler (1913-1980), and John C. Eccles (1903-1997) on the nerve-muscle junction as a milestone in twentieth-century neurophysiology with wider scientific implications. The historical question is approached from two perspectives: (a) an investigation of twentieth-century solutions to a longer physiological dispute and (b) an examination of a new kind of laboratory and academic cooperation. From this vantage point, the work pursued in Sydney by Sir John Carew Eccles' team on the neuromuscular junction is particularly valuable, since it contributed a central functional element to modern physiological understanding regarding the function and structure of the human and animal nervous system...
April 17, 2017: Journal of the History of the Neurosciences
https://www.readbyqxmd.com/read/28413809/preclinical-imaging-of-iridocorneal-angle-and-fundus-using-a-modified-integrated-flexible-handheld-probe
#18
Xun Jie Jeesmond Hong, Vengalathunadakal K Shinoj, Vadakke Matham Murukeshan, Mani Baskaran, Tin Aung
A flexible handheld imaging probe consisting of a [Formula: see text] charge-coupled device camera, light-emitting diode light sources, and near-infrared laser source is designed and developed. The imaging probe is designed with specifications to capture the iridocorneal angle images and posterior segment images. Light propagation from the anterior chamber of the eye to the exterior is considered analytically using Snell's law. Imaging of the iridocorneal angle region and fundus is performed on ex vivo porcine samples and subsequently on small laboratory animals, such as the New Zealand white rabbit and nonhuman primate, in vivo...
April 2017: Journal of Medical Imaging
https://www.readbyqxmd.com/read/28407279/orangutan-trade-confiscations-and-lack-of-prosecutions-in-indonesia
#19
Vincent Nijman
Prosecuting and sentencing law breakers punishes the offender and acts as a deterrent for future law breakers. With thousands of Sumatran and Bornean orangutans (Pongo abelii and P. pygmaeus) having entered private and government rescue centers and facilities, I evaluate the role of successful prosecution in orangutan conservation in Indonesia. Orangutans have been protected in Indonesian since 1931 and they are not allowed to be traded or to be kept as pets. In the period 1993-2016 at least 440 orangutans were formally confiscated, and many more were "donated" to law enforcement agencies...
April 13, 2017: American Journal of Primatology
https://www.readbyqxmd.com/read/28400519/balance-of-microtubule-stiffness-and-cortical-tension-determines-the-size-of-blood-cells-with-marginal-band-across-species
#20
Serge Dmitrieff, Adolfo Alsina, Aastha Mathur, François J Nédélec
The fast bloodstream of animals is associated with large shear stresses. To withstand these conditions, blood cells have evolved a special morphology and a specific internal architecture to maintain their integrity over several weeks. For instance, nonmammalian red blood cells, mammalian erythroblasts, and platelets have a peripheral ring of microtubules, called the marginal band, that flattens the overall cell morphology by pushing on the cell cortex. In this work, we model how the shape of these cells stems from the balance between marginal band rigidity and cortical tension...
April 25, 2017: Proceedings of the National Academy of Sciences of the United States of America
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