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https://www.readbyqxmd.com/read/27900320/the-golden-spiral-flap-a-new-flap-design-that-allows-for-closure-of-larger-wounds-under-reduced-tension-how-studying-nature-s-own-design-led-to-the-development-of-a-new-surgical-technique
#1
Sharad P Paul
This paper details the study of biodynamic excisional skin tension lines on the scalp and the development of a new flap technique for closure of scalp wounds. Recently, a study by this author, on pigskin, replicated whorls by placing tissue under rapid stretch using saline tissue expanders, by recreating rapid dermo-epidermal shear of skin - thereby concluding that the golden spiral pattern is nature's own pattern for rapid expansion. Given the relationship between tissue expansion and stretch has been shown to cause deformation gradients that have both elastic and growth factors, the author set out to test the hypothesis that a golden spiral pattern therefore would be more efficient at closing wounds under less tension when compared with standard semicircular rotational flap patterns...
2016: Frontiers in Surgery
https://www.readbyqxmd.com/read/27883274/impact-of-the-chronic-omega-3-fatty-acids-supplementation-in-hemiparkinsonism-model-induced-by-6-hydroxydopamine-in-rats
#2
Alexandre Sales Barros, Rafael Yuri Gouveia Crispim, Juliana Cavalcante Uchoa, Ricardo Basto Souza, Jonatas Cavalcante Lemos, Gerardo Cristino Filho, Mirna Marques Bezerra, Thales Fontenele Moraes Pinheiro, Silvânia Maria Mendes de Vasconcelos, Danielle Silveira Macêdo, Glauce Socorro de Barros Viana, Lissiana Magna Vasconcelos Aguiar
Parkinson's disease (PD) is characterized by a progressive degeneration of dopaminergic neurons in the substantia nigra. The neuronal degeneration may result from the convergence of a number of different pathogenic factors, including apoptosis, excitotoxicity and oxidative stress. Many studies emphasize the importance of omega-3 polyunsaturated fatty acids (ω-3 PUFAs) in vital processes such as maintenance of the properties of cell membranes and the participation in signal transduction and biodynamic activity of neuronal membranes...
November 24, 2016: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/27821556/amnion-epithelial-cells-promote-lung-repair-via-lipoxin-a4
#3
Jean L Tan, Yan Z Tan, Ruth Muljadi, Siow T Chan, Sin N Lau, Joanne C Mockler, Euan M Wallace, Rebecca Lim
: : Human amnion epithelial cells (hAECs) have been shown to possess potent immunomodulatory properties across a number of disease models. Recently, we reported that hAECs influence macrophage polarization and activity, and that this step was dependent on regulatory T cells. In this study, we aimed to assess the effects of hAEC-derived proresolution lipoxin-A4 (LXA4) on T-cell, macrophage, and neutrophil phenotype and function during the acute phase of bleomycin-induced lung injury. Using C57Bl6 mice, we administered 4 million hAECs intraperitoneally 24 hours after bleomycin challenge...
November 7, 2016: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/27810489/the-influence-of-urea-and-nitrate-nutrients-on-the-bioavailability-and-toxicity-of-nickel-to-prorocentrum-donghaiense-dinophyta-and-skeletonema-costatum-bacillariophyta
#4
Xu-Guang Huang, Xie-Chang Lin, Shun-Xing Li, Song-Li Xu, Feng-Jiao Liu
Nitrogen nutrients and nickel(Ni) are ubiquitous in aquatic environments, and they are important for primary production of ocean ecosystem. This study examined the interaction of nitrogen nutrients (specifically urea and nitrate) and Ni on chlorophyll (Chl a) concentration and photosynthesis parameters values of Prorocentrum donghaiense and Skeletonema costatum. The data presented here indicate that low concentration of Ni for P. donghaiense and S. costatum can enhance both Chl a concentration and photosynthesis parameters values when grown in urea containing environment...
December 2016: Aquatic Toxicology
https://www.readbyqxmd.com/read/27739135/effects-of-intensive-and-alternative-production-systems-on-the-technological-and-quality-parameters-of-rapeseed-seed-brassica-napus-l-siska
#5
Maja Turinek, Martina Bavec, Milan Repič, Matjaž Turinek, Andreja Urbanek Krajnc, Christian Möllers, Alba Tres, Franc Bavec
BACKGROUND: Organic production is widely assumed to affect quality and nutritional parameters of arable crops. A field experiment was started in 2009 following integrated (INT), organic (ORG) and biodynamic (BD) production standards for wheat, maize and rapeseed production. With resort to standard analytical procedures and chemometrics, compositional parameters of Brassica napus L. 'Siska' seed (water, protein, oil and glucosinolate content) by non-destructive near-infrared spectroscopy (NIRS), and fatty acid composition determined by gas chromatography, were assessed...
October 14, 2016: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/27709429/nutrient-changes-and-biodynamics-of-eisenia-fetida-during-vermicomposting-of-water-lettuce-pistia-sp-biomass-a-noxious-weed-of-aquatic-system
#6
Surindra Suthar, Bhawna Pandey, Rita Gusain, Rubia Zahid Gaur, Kapil Kumar
This paper reports the results of vermicomposting of water lettuce biomass (WL) spiked with cow dung at ratios of 20, 40, 60, and 80 % employing Eisenia fetida. A total of four treatments were established and changes in chemical properties of mixtures were observed. Vermicomposting caused a decrease in pH, TOC, volatile solids, and C/N ratio by 1.01-1.08-fold, 0.85-0.92-fold, 0.94-0.96-fold, 0.56-0.70-fold, respectively, but increase in EC, totN, totP, totK, totCa, totZn, totFe, and totCu, by 1.19-1.42-fold, 1...
October 5, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27640154/biodynamics-of-copper-oxide-nanoparticles-and-copper-ions-in-an-oligochaete-part-ii-subcellular-distribution-following-sediment-exposure
#7
Amalie Thit, Tina Ramskov, Marie-Noële Croteau, Henriette Selck
The use and likely incidental release of metal nanoparticles (NPs) is steadily increasing. Despite the increasing amount of published literature on metal NP toxicity in the aquatic environment, very little is known about the biological fate of NPs after sediment exposures. Here, we compare the bioavailability and subcellular distribution of copper oxide (CuO) NPs and aqueous Cu (Cu-Aq) in the sediment-dwelling worm Lumbriculus variegatus. Ten days (d) sediment exposure resulted in marginal Cu bioaccumulation in L...
August 31, 2016: Aquatic Toxicology
https://www.readbyqxmd.com/read/27548282/development-and-validation-of-a-biodynamic-model-for-mechanistically-predicting-metal-accumulation-in-fish-parasite-systems
#8
T T Yen Le, Milen Nachev, Daniel Grabner, A Jan Hendriks, Bernd Sures
Because of different reported effects of parasitism on the accumulation of metals in fish, it is important to consider parasites while interpreting bioaccumulation data from biomonitoring programmes. Accordingly, the first step is to take parasitism into consideration when simulating metal bioaccumulation in the fish host under laboratory conditions. In the present study, the accumulation of metals in fish-parasite systems was simulated by a one-compartment toxicokinetic model and compared to uninfected conspecifics...
2016: PloS One
https://www.readbyqxmd.com/read/27500633/are-epiphytic-microbial-communities-in-the-carposphere-of-ripening-grape-clusters-vitis-vinifera-l-different-between-conventional-organic-and-biodynamic-grapes
#9
Elizabeth Kecskeméti, Beate Berkelmann-Löhnertz, Annette Reineke
Using barcoded pyrosequencing fungal and bacterial communities associated with grape berry clusters (Vitis vinifera L.) obtained from conventional, organic and biodynamic vineyard plots were investigated in two subsequent years at different stages during berry ripening. The four most abundant operational taxonomic units (OTUs) based on fungal ITS data were Botrytis cinerea, Cladosporium spp., Aureobasidium pullulans and Alternaria alternata which represented 57% and 47% of the total reads in 2010 and 2011, respectively...
2016: PloS One
https://www.readbyqxmd.com/read/27453542/a-new-skin-tensiometer-device-computational-analyses-to-understand-biodynamic-excisional-skin-tension-lines
#10
Sharad P Paul, Justin Matulich, Nick Charlton
One of the problems in planning cutaneous surgery is that human skin is anisotropic, or directionally dependent. Indeed, skin tension varies between individuals and at different body sites. Many a surgeon has tried to design different devices to measure skin tension to help plan excisional surgery, or to understand wound healing. However, many of the devices have been beset with problems due to many confounding variables - differences in technical ability, material (sutures) used and variability between different users...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27451171/-1-h-nmr-foodomics-reveals-that-the-biodynamic-and-the-organic-cultivation-managements-produce-different-grape-berries-vitis-vinifera-l-cv-sangiovese
#11
Gianfranco Picone, Alessia Trimigno, Paola Tessarin, Silvia Donnini, Adamo Domenico Rombolà, Francesco Capozzi
The increasing demand for natural foods and beverages, i.e. prepared by excluding synthetic chemicals along the whole production chain, has boosted the adoption of organic and biodynamic cultivation methods which are based on protocols avoiding use of synthetic pesticides. This trend is striking in viticulture, since wine production is largely shaped by the varying drinking attitudes of environment-friendly consumers. Using (1)H NMR, the compositions of grape berries, collected at harvest in 2009 and 2011, in experimental plots cultivated either with biodynamic or organic methods, were compared...
December 15, 2016: Food Chemistry
https://www.readbyqxmd.com/read/27367827/seawater-temperature-effect-on-metal-accumulation-and-toxicity-in-the-subantarctic-macquarie-island-isopod-exosphaeroma-gigas
#12
Alexander Lewis, Catherine K King, Nicole A Hill, Ashley Cooper, Ashley T Townsend, Julie A Mondon
Very little is currently known of subantarctic nearshore invertebrates' sensitivity to environmental metals and the role of temperature in this relationship. This study investigated Cu and Zn toxicity in the common subantarctic intertidal isopod, Exosphaeroma gigas, and the influence of temperature on Cu toxicity and bioaccumulation kinetics. Adult E. gigas are insensitive to Cu and Zn at concentrations of 3200 and 7400μg/L respectively in non-renewal tests at 5.5°C (ambient subtidal temperature) over 14days...
August 2016: Aquatic Toxicology
https://www.readbyqxmd.com/read/27322020/ernst-haeckel-s-biodynamics-1866-and-the-occult-basis-of-organic-farming
#13
Ulrich Kutschera
One hundred and 50 years ago (Sept. 1866), Ernst Haeckel published a monograph entitled General Morphology of Organisms, wherein key terms, such as Protista, Monera, ontogeny, phylogeny, ecology and the 'biogenetic law' where introduced. In addition, Haeckel coined the word "biodynamics" as a synonym for "general physiology." In contrast, Rudolf Steiner's "biodynamic agriculture," which originated in 1924, and was promoted via Ehrenfried Pfeiffer's book of 1938 with the same title, is an occult pseudoscience still popular today...
July 2, 2016: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/27294650/absorbed-power-distribution-in-the-whole-body-system-of-a-tractor-operator
#14
Jacek Kromulski, Tadeusz Pawłowski, Jan Szczepaniak, Wojciech Tanaś, Andrzej Wojtyła, Mariusz Szymanek, Jacek Tanaś, Waldemar Izdebski
INTRODUCTION AND OBJECTIVE: Many people are exposed to vibration (WBV) in their occupational lives. The biodynamic responses of the human body in sitting conditions have been widely measured under whole-body vibration (WBV). The measures are most often expressed in terms of force-motion relations at the driving-point, namely, mechanical impedance, apparent mass and absorbed power, and flow of vibration through the body, such as seat-to-head and body segments vibration transmissibility...
June 2, 2016: Annals of Agricultural and Environmental Medicine: AAEM
https://www.readbyqxmd.com/read/27235153/a-cad-cam-prototyped-temporomandibular-condyle-connected-to-a-bony-plate-to-support-a-free-fibula-flap-in-patients-undergoing-mandiblectomy-a-pilot-study-with-5-years-of-follow-up
#15
Leonardo Ciocca, Achille Tarsitano, Claudio Marchetti, Roberto Scotti
Reconstruction of the condyle after an ablative procedure with the aim of cancer elimination remains surgically challenging. This pilot study focused on mandibular condylar replacement using CAD-CAM temporomandibular prostheses connected to customized reconstructive plates to support free fibula flaps in oncological patients. Five patients underwent mandibular disarticulation resection, and two of them completed their 5-year follow ups. The condylar anatomy, the position of the condyle within the glenoid fossa, and glenoid anatomy were measured by superimposing pre- and postoperative CT images (obtained after 6 months and 5 years of follow up)...
July 2016: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/27206993/response-of-the-seated-human-body-to-whole-body-vertical-vibration-biodynamic-responses-to-mechanical-shocks
#16
Zhen Zhou, Michael J Griffin
The biodynamic response of the seated human body has been investigated with 20 males exposed to upward and downward shocks at 13 fundamental frequencies (1-16 Hz) and 18 magnitudes (up to ±8.3 ms(-2)). For 1- and 2- degree-of-freedom models, the stiffness and damping coefficients were obtained by fitting seat acceleration waveforms predicted from the measured force to the measured seat acceleration waveform. Stiffness and damping coefficients were also obtained in the frequency domain with random vibration...
May 20, 2016: Ergonomics
https://www.readbyqxmd.com/read/27133233/environment-and-genotype-effects-on-antioxidant-properties-of-organically-grown-wheat-varieties-a-three-year-study
#17
R Di Silvestro, A Di Loreto, S Bosi, V Bregola, I Marotti, S Benedettelli, A Segura-Carretero, G Dinelli
BACKGROUND: Wheat grain (Triticum aestivum L.) possesses significant amounts of antioxidants that contribute to the dietary antiradical protection against a number of chronic diseases. Despite the increasing interest towards organic food among both consumers and scientists, the availability of literature studies concerning the environment effect under organic management is still scarce. The aim of this study was to evaluate the antioxidant properties of wheat varieties by considering the genotype response to different environmental factors under biodynamic management...
May 2, 2016: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/27057993/contribution-of-aqueous-and-dietary-uptakes-to-lead-pb-bioaccumulation-in-gammarus-pulex-from-multipathway-modeling-to-in-situ-validation
#18
Rym Hadji, Nastassia Urien, Emmanuelle Uher, Lise C Fechner, Jérémie D Lebrun
Although dynamic approaches are nowadays used increasingly to describe metal bioaccumulation in aquatic organisms, the validation of such laboratory-derived modeling is rarely assessed under environmental conditions. Furthermore, information on bioaccumulation kinetics of Pb and the significance of its uptake by dietary route is scarce in freshwater species. This study aims at modeling aqueous and dietary uptakes of Pb in the litter-degrader Gammarus pulex and assessing the predictive quality of multipathway modeling from in situ bioaccumulation data...
July 2016: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/26929824/review-and-evaluation-of-hand-arm-coordinate-systems-for-measuring-vibration-exposure-biodynamic-responses-and-hand-forces
#19
REVIEW
Ren G Dong, Erik W Sinsel, Daniel E Welcome, Christopher Warren, Xueyan S Xu, Thomas W McDowell, John Z Wu
The hand coordinate systems for measuring vibration exposures and biodynamic responses have been standardized, but they are not actually used in many studies. This contradicts the purpose of the standardization. The objectives of this study were to identify the major sources of this problem, and to help define or identify better coordinate systems for the standardization. This study systematically reviewed the principles and definition methods, and evaluated typical hand coordinate systems. This study confirms that, as accelerometers remain the major technology for vibration measurement, it is reasonable to standardize two types of coordinate systems: a tool-based basicentric (BC) system and an anatomically based biodynamic (BD) system...
September 2015: Safety and Health At Work
https://www.readbyqxmd.com/read/26897647/active-passive-biodynamics-of-the-human-trunk-when-seated-on-a-wobble-chair
#20
A Shahvarpour, A Shirazi-Adl, C Larivière
Unstable sitting on a wobble chair with different balance difficulty levels can be used as an effective tool in exercises as well as evaluation and therapeutic stages of rehabilitation. No data on muscle activity levels and spinal loads are however available to assess its safety compared to other regular daily activities. The goal of this study was to estimate muscle forces and spinal loads in a seated unstable wobble chair task. In vivo 3D kinematics of the trunk and seat collected in an earlier study were used here to drive computational trunk musculoskeletal models of 6 normal and 6 low-back pain subject groups sitting on a wobble chair for a duration of 10s...
April 11, 2016: Journal of Biomechanics
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