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https://www.readbyqxmd.com/read/28204900/cadmium-bioaccumulation-in-aquatic-oligochaetes-using-a-biodynamic-model-a-review-of-values-of-physiological-parameters-and-model-validation-using-laboratory-and-field-bioaccumulation-data
#1
REVIEW
Leire Méndez-Fernández, Pilar Rodriguez, Maite Martínez-Madrid
This study reviews certain physiological digestive parameters in the literature that could be used to predict tissue residues in aquatic oligochaetes using the biodynamic model. Predictions were evaluated with independently measured Cd bioaccumulation data in sediment bioassays and field oligochaetes. The parameter review focused on three species commonly used in ecotoxicity testing and bioaccumulation studies: Tubifex tubifex (Tt), Limnodrilus hoffmeisteri (Lh) and Lumbriculus variegatus (Lv). Median Ingestion rates (g g(-1) d(-1), dw) at unpolluted conditions were 7...
February 16, 2017: Reviews of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28195714/predicting-partitioning-and-diffusion-properties-of-nonpolar-chemicals-in-biotic-media-and-passive-sampler-phases-by-gc-%C3%A3-gc
#2
Deedar Nabi, J Samuel Arey
The chemical parameters needed to explain and predict bioavailability, biodynamics, and baseline toxicity are not readily available for most nonpolar chemicals detected in the environment. Here, we demonstrate that comprehensive two-dimensional gas chromatography (GC × GC) retention times can be used to predict 26 relevant properties for nonpolar chemicals, specifically: partition coefficients for diverse biotic media and passive sampler phases; aquatic baseline toxicity; and relevant diffusion coefficients...
February 14, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28169527/molecular-biodynamers-dynamic-covalent-analogues-of-biopolymers
#3
Yun Liu, Jean-Marie Lehn, Anna K H Hirsch
Constitutional dynamic chemistry (CDC) features the use of reversible linkages at both molecular and supramolecular levels, including reversible covalent bonds (dynamic covalent chemistry, DCC) and noncovalent interactions (dynamic noncovalent chemistry, DNCC). Due to its inherent reversibility and stimuli-responsiveness, CDC has been widely utilized as a powerful tool for the screening of bioactive compounds, the exploitation of receptors or substrates driven by molecular recognition, and the fabrication of constitutionally dynamic materials...
February 7, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28113692/admittance-adaptive-model-based-approach-to-mitigate-biodynamic-feedthrough
#4
Joost Venrooij, Max Mulder, Mark Mulder, David A Abbink, Marinus M van Paassen, Frans C T van der Helm, Heinrich H Bulthoff
Biodynamic feedthrough (BDFT) refers to the feedthrough of vehicle accelerations through the human body, leading to involuntary control device inputs. BDFT impairs control performance in a large range of vehicles under various circumstances. Research shows that BDFT strongly depends on adaptations in the neuromuscular admittance dynamics of the human body. This paper proposes a model-based approach of BDFT mitigation that accounts for these neuromuscular adaptations. The method was tested, as proof-of-concept, in an experiment where participants inside a motion simulator controlled a simulated vehicle through a virtual tunnel...
September 12, 2016: IEEE Transactions on Cybernetics
https://www.readbyqxmd.com/read/28089465/differential-bioaccumulation-patterns-of-nanosized-and-dissolved-silver-in-a-land-snail-achatina-fulica
#5
Yuanzhen Chen, Youbin Si, Dongmei Zhou, Fei Dang
With the increasing application in antimicrobial products, silver nanoparticles (AgNP) are inevitably released into the terrestrial environment, and pose potential risks to invertebrates such as land snails Achatina fulica, which take up AgNP from food and water. Here we differentiate Ag uptake biodynamic between Ag forms (i.e., PVP-AgNP vs. AgNO3) and between exposure pathways. Snails assimilated Ag efficiently from lettuce leaves pre-exposed to AgNP, with assimilation efficiencies (AEs) averaging 62-85% and food ingestion rates of 0...
March 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28046047/expectation-or-sensorial-reality-an-empirical-investigation-of-the-biodynamic-calendar-for-wine-drinkers
#6
Wendy V Parr, Dominique Valentin, Phil Reedman, Claire Grose, James A Green
The study's aim was to investigate a central tenet of biodynamic philosophy as applied to wine tasting, namely that wines taste different in systematic ways on days determined by the lunar cycle. Nineteen New Zealand wine professionals tasted blind 12 Pinot noir wines at times determined within the biodynamic calendar for wine drinkers as being favourable (Fruit day) and unfavourable (Root day) for wine tasting. Tasters rated each wine four times, twice on a Fruit day and twice on a Root day, using 20 experimenter-provided descriptors...
2017: PloS One
https://www.readbyqxmd.com/read/28040526/the-effect-of-treatment-of-idiopathic-intracranial-hypertension-on-prevalence-of-retinal-and-choroidal-folds
#7
Mark J Kupersmith, Patrick A Sibony, Steven E Feldon, Jui-Kai Wang, Mona Garvin, Randy Kardon
PURPOSE: We described 3 types of folds in the retina and a crease in the outer retina associated with papilledema due to idiopathic intracranial hypertension (IIH) at presentation. We report the change in folds relative to treatment of IIH over the six months. Design/Study Subjects: Substudy of a randomized clinical trial. METHODS: Study eyes of subjects assigned to acetazolamide (ACZ, n=44) or placebo (PLB, n=43) had spectral domain optical coherence tomography (SDOCT) images of the optic disc and macula regions at baseline, 3 and 6 months...
December 28, 2016: American Journal of Ophthalmology
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
#8
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
#9
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
#10
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
#11
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
#12
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
#13
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...
January 2017: 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
#14
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...
November 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
#15
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
#16
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
#17
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
#18
COMPARATIVE STUDY
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
#19
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
#20
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
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