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Journal articles on the topic 'Microdyn'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Neubert, Jonas C., André Kretzschmar, Sascha Wüstenberg, and Samuel Greiff. "Extending the Assessment of Complex Problem Solving to Finite State Automata." European Journal of Psychological Assessment 31, no. 3 (2015): 181–94. http://dx.doi.org/10.1027/1015-5759/a000224.

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Abstract. Recent advancements in the assessment of Complex Problem Solving (CPS) build on the use of homogeneous tasks that enable the reliable estimation of CPS skills. The range of problems featured in established instruments such as MicroDYN is consequently limited to a specific subset of homogeneous complex problems. This restriction is problematic when looking at domain-specific examples of complex problems, which feature characteristics absent from current assessment instruments (e.g., threshold states). We propose to utilize the formal framework of Finite State Automata (FSA) to extend

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Krkovic, Katarina, Sascha Wüstenberg, and Samuel Greiff. "Assessing Collaborative Behavior in Students." European Journal of Psychological Assessment 32, no. 1 (2016): 52–60. http://dx.doi.org/10.1027/1015-5759/a000329.

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Abstract. Skilful collaborative problem-solving is becoming increasingly important in various life areas. However, researchers are still seeking ways to assess and foster this skill in individuals. In this study, we developed a computer-assisted assessment for collaborative behavior (COLBAS) following the experiment-based assessment of behavior approach (objective personality tests; Cattell, 1958 ). The instrument captures participants’ collaborative behavior in problem-solving tasks using the MicroDYN approach while participants work collaboratively with a computer-agent. COLBAS can thereby a

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Greiff, Samuel, and Sascha Wüstenberg. "Assessment With Microworlds using MicroDYN: Measurement Invariance and Latent Mean Comparisons." European Journal of Psychological Assessment 30, no. 4 (2014): 304–14. http://dx.doi.org/10.1027/1015-5759/a000194.

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Computer-simulated microworlds have witnessed significant international interest over the last decades as assessment vehicles for complex mental skills. This interest strongly contrasts to what is currently known about measurement characteristics of microworlds. In this study measurement invariance and latent means of the MicroDYN measure, a computer-based assessment instrument containing an entire set of dynamic microworlds, were examined in four German subsamples of junior high school students in 8th–10th grade (n = 309), senior high school students in 11th–13th grade (n = 484), university s

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Serrano-Molina, Lizette, Mónica Hernández-López, Dolores Azucena Salazar-Piña, Silvia Bautista-Baños, and Margarita de Lorena Ramos-García. "The Response of Naturally Based Coatings and Citrus Fungicides to the Development of Four Postharvest Fungi." Journal of Fungi 10, no. 5 (2024): 309. http://dx.doi.org/10.3390/jof10050309.

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The tomato (Licopersicon esculentum Mill.) is considered to be one of the products with the highest demand due to its nutritional value; however, it is susceptible to infection by fungi during its pre- and postharvest stages. In this research, three commercial products (1% Citrocover, 1% Citro 80, and 0.002% Microdyn) and two coatings based on 1.0% chitosan/0.1% lime or 0.1% orange essential oils were evaluated in vitro and on Saladette tomatoes that were previously inoculated with four postharvest fungi. The application of the commercial citrus-based product Citrocover was highly effective in

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Quintero Jiménez, Anareli, Laura Sofía Castillo Ortega, and Edgar López López. "Efecto del aceite esencial de Cymbopogon citratus (dc.) Stapf (zacate limón) en la conservación de calidad postcosecha de fresa." Biotecnia 27 (February 7, 2025): e2460. https://doi.org/10.18633/biotecnia.v27.2460.

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Se evaluó el efecto del aceite esencial de zacate limón (Cymbopogon citratus) sobre la calidad postcosecha en frutos de fresas durante 21 días de almacenamiento a 4°C. Se emplearon concentraciones de 0.5%, 1.0%, 1.5% y 2.0% de aceite esencial de zacate limón, comparándolas con un control negativo y un control positivo con Microdyn. Los tratamientos con 1.5% y 2.0% de aceite esencial fueron los más efectivos en la conservación de la firmeza, el contenido de humedad y la actividad antioxidante, manteniendo la frescura visual del fruto. En contraste, los tratamientos con concentraciones de 0.5% y

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Herrmann, W., J. F. Beckmann, and A. Kretzschmar. "The role of learning in complex problem solving using MicroDYN." Intelligence 100 (September 2023): 101773. http://dx.doi.org/10.1016/j.intell.2023.101773.

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7

Stadler, Matthias, Amadeus J. Pickal, Laura Brandl, and Florian Krieger. "VOTAT in Action." Zeitschrift für Psychologie 232, no. 2 (2024): 109–19. http://dx.doi.org/10.1027/2151-2604/a000559.

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Abstract: In our study, we integrated the vary-one-thing-at-a-time (VOTAT) strategy within epistemic activities in knowledge-lean problem-solving. VOTAT, altering a single variable while keeping others constant, was examined through a dual approach: an empirical analysis with MicroDYN tasks and a theoretical discussion. Empirically, we identified differences among participants who fully engaged in the VOTAT loop, those with incomplete loops, and nonusers. These distinctions were evident in their problem-solving approaches, hypothesis formulation, and decision-making efficiency. Theoretically,

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Greiff, Samuel, and Andreas Fischer. "Der Nutzen einer komplexen Problemlösekompetenz: Theoretische Überlegungen und empirische Befunde." Zeitschrift für Pädagogische Psychologie 27, no. 1-2 (2013): 27–39. http://dx.doi.org/10.1024/1010-0652/a000086.

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Seit Jahrzehnten wird diskutiert ob komplexes Problemlösen (KPL) ausschließlich von Intelligenz und Vorwissen abhängt, oder ob das systematische Generieren von Informationen, die viable Repräsentation der wesentlichen kausalen Zusammenhänge, sowie die zielführende Anwendung von Wissen operative Aspekte von Intelligenz erfordern, die von herkömmlichen Intelligenztests nur unzureichend erfasst werden. Der Klärung dieser Frage stehen bisher messtheoretische Probleme und eine unklare Abgrenzung von KPL zu Vorwissen und fluider Intelligenz gegenüber. In dieser Arbeit wird daher ein Verfahren zur Me

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9

Schweizer, Fabian, Sascha Wüstenberg, and Samuel Greiff. "Validity of the MicroDYN approach: Complex problem solving predicts school grades beyond working memory capacity." Learning and Individual Differences 24 (April 2013): 42–52. http://dx.doi.org/10.1016/j.lindif.2012.12.011.

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Sánchez-Arévalo, Carmen M., Ane Pérez García-Serrano, María Cinta Vincent-Vela, and Silvia Álvarez-Blanco. "Combining Ultrafiltration and Nanofiltration to Obtain a Concentrated Extract of Purified Polyphenols from Wet Olive Pomace." Membranes 13, no. 2 (2023): 119. http://dx.doi.org/10.3390/membranes13020119.

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Despite the environmental concerns raised every year by the generation of high volumes of wet olive pomace, it contains valuable phenolic compounds that are essential for the valorization of this by-product. In this work, an integrated process to recover phenolic compounds from wet olive pomace is proposed. It consists of ultrasound-assisted solid-liquid extraction, followed by ultrafiltration and nanofiltration. Several commercial membranes were studied at different operational conditions. The ultrafiltration stage allowed the purification of biophenols, which were obtained in the permeate st

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Schlackl, Herchl, and Samhaber. "Nanofiltration of Succinic Acid in Strong Alkaline Conditions." Membranes 9, no. 11 (2019): 147. http://dx.doi.org/10.3390/membranes9110147.

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Nanofiltration is considered to be an appropriate separation technique in the production of bio-based materials. For the utilization of process streams from the viscose-fiber production, understanding the separation behavior of organic compounds in highly alkaline solutions is necessary. Experiments with succinic acid in sodium hydroxide (NaOH) solutions with varying concentrations up to 5 mol L−1 were performed with the NP030 membrane from Microdyn Nadir. Furthermore, experiments with aqueous disodium succinate and solutions of sodium sulfate in sodium hydroxide were carried out. The influenc

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Christova, Darinka, Maya Staneva, Sijka Ivanova, et al. "Surface Modification of Polyethersulfon Nanofiltration Membrane for Improving Water-Ethanol Separation." Journal of Physics: Conference Series 2436, no. 1 (2023): 012024. http://dx.doi.org/10.1088/1742-6596/2436/1/012024.

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Abstract This paper reports on the surface modification of a nanofiltration polyethersulfon membrane, Microdyn Nadir NP030P, aiming at improved water-ethanol separation. To achieve this, three types of poly(vinyl alcohol) copolymers of varied hydrophilic-lipophilic balance were synthesized and tested as modifiers: double hydrophilic graft copolymer with poly(N,N-dimethyl acrylamide) side chains, amphiphilic copolymer of partially acetalized PVA, as well as amphiphilic copolymer with grafted hydrophobic poly(methyl methacrylate) chains. Copolymers’ chemical structure, composition and properties

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Sabri, Souhir, Ahmad Najjar, Yehia Manawi, et al. "Antibacterial Properties of Polysulfone Membranes Blended with Arabic Gum." Membranes 9, no. 2 (2019): 29. http://dx.doi.org/10.3390/membranes9020029.

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Polysulfone (PS) membranes blended with different loadings of arabic gum (AG) were synthesized using phase inversion method and the antibacterial properties of the synthesized membranes were tested using a number Gram-negative (Escherichia coli, Klebsiella pneumonia and Pseudomonas aeruginosa) and Gram-positive (Staphylococcus aureus) bacterial species. It was shown that AG addition to the dope polymer solutions essentially changed porous structure, hydrophilicity and zeta potential of the cast PS/AG membranes. These changes were due to the amphiphilic properties of AG macromolecules that cont

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Cassano, Bentivenga, Conidi, Galiano, Saoncella, and Figoli. "Membrane-Based Clarification and Fractionation of Red Wine Lees Aqueous Extracts." Polymers 11, no. 7 (2019): 1089. http://dx.doi.org/10.3390/polym11071089.

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Polyvinylidenefluoride (PVDF) hollow fiber membranes prepared in laboratory through the inversion phase method were characterized and used to clarify an aqueous extract from red wine lees. Steady-state permeate fluxes of 53 kg/m2h were obtained in the treatment of the aqueous extract in selected operating conditions. Suspended solids were completely retained by the hollow fiber membranes while bioactive compounds, including polyphenols, anthocyanins, and resveratrol were recovered in the permeate stream. The clarified stream was then fractionated by nanofiltration (NF). Three different commerc

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Lazarova, M., M. Dencheva-Zarkova, D. Yankov, and J. Genova. "Effect of driving pressure and flux rate on red wine nanofiltration." Journal of Physics: Conference Series 2436, no. 1 (2023): 012002. http://dx.doi.org/10.1088/1742-6596/2436/1/012002.

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Abstract Red wine contains many bioactive components, such as phenolics, which play a beneficial role on human health and also are responsible for important sensory qualities of wine. Membrane technology offers advantages compared to the conventional methods used for polyphenols extraction in terms of high recovery/removal efficiency, no phase transition and mild operating conditions. In this study, nanofiltration of the native Bulgarian red wine Mavrud was performed. The MaxiMem membrane filtration system employing the nanofiltration membrane Microdyn Nadir™ NP030 P (MWCO 500 Da) was used for

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Klimonda, A., and I. Kowalska. "Application of polymeric membranes for the purification of solutions containing cationic surfactants." Water Science and Technology 79, no. 7 (2019): 1241–52. http://dx.doi.org/10.2166/wst.2019.115.

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Abstract The aim of the study was to examine physicochemical properties of three cationic surfactants and to evaluate the effectiveness of their removal with the use of polymeric membranes. The experiments were performed in a laboratory scale set-up with the use of Microdyn-Nadir® nanofiltration and ultrafiltration membranes. Cetrimonium bromide (CTAB), benzalkonium chloride (BAC) and Tequat LC90i (TEAQ) were chosen for the test. In the experiments, surfactant solutions in a wide range of concentration were treated (50–3,000 mg L−1). The experimental research included evaluation of the effect

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Abejón, Ricardo, Javier Rabadán, Aurora Garea, and Angel Irabien. "Comparison of Supported Ionic Liquid Membranes and Polymeric Ultrafiltration and Nanofiltration Membranes for Separation of Lignin and Monosaccharides." Membranes 10, no. 2 (2020): 29. http://dx.doi.org/10.3390/membranes10020029.

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Lignin is one of the three main components of lignocellulosic biomass and must be considered a raw material with attractive applications from an economic and ecological point of view. Therefore, biorefineries must have in mind the most adequate processing to obtain high-quality lignin and the separation tasks that play a key role to improve the purity of the lignin. Separation techniques based on membranes are a promising way to achieve these requirements. In this work, the separation performance of the SILM (Supported Ionic Liquid Membrane) formed with [BMIM][DBP] as IL (Ionic Liquid) and PTF

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Sánchez-Arévalo, Carmen M., Fausto Aldegheri, M. Cinta Vincent-Vela, and Silvia Álvarez-Blanco. "Integrated Membrane Process in Organic Media: Combining Organic Solvent Ultrafiltration, Nanofiltration, and Reverse Osmosis to Purify and Concentrate the Phenolic Compounds from Wet Olive Pomace." International Journal of Molecular Sciences 25, no. 10 (2024): 5233. http://dx.doi.org/10.3390/ijms25105233.

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Phenolic compounds from a hydroalcoholic extract of wet olive pomace were purified and concentrated by an integrated membrane process in organic media. First, UF010104 (Solsep BV) and UP005 (Microdyn Nadir) membranes were tested to be implemented in the ultrafiltration stage, with the aim of purifying the extract and obtaining a permeate enriched in phenolic compounds. Despite the high flux observed with the UF010104 membrane (20.4 ± 0.7 L·h−1·m−2, at 2 bar), the UP005 membrane was selected because of a more suitable selectivity. Even though some secoiridoids were rejected, the permeate stream

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Greiff, Samuel, Katarina Krkovic, and Jarkko Hautamäki. "The Prediction of Problem-Solving Assessed Via Microworlds." European Journal of Psychological Assessment 32, no. 4 (2016): 298–306. http://dx.doi.org/10.1027/1015-5759/a000263.

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Abstract. In this study, we explored the network of relations between fluid reasoning, working memory, and the two dimensions of complex problem solving, rule knowledge and rule application. In doing so, we replicated the recent study by Bühner, Kröner, and Ziegler (2008) and the structural relations investigated therein [ Bühner, Kröner, & Ziegler, (2008) . Working memory, visual-spatial intelligence and their relationship to problem-solving. Intelligence, 36, 672–680]. However, in the present study, we used different assessment instruments by employing assessments of figural, numerical,

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Ilavský, Ján, Danka Barloková, and Michal Prosňanský. "The Use of Membrane Processes in Manganese Removal from Drinking Water." Water 17, no. 8 (2025): 1226. https://doi.org/10.3390/w17081226.

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This article deals with the removal of manganese from water via ultrafiltration and the oxidation of manganese with chlorine dioxide or potassium permanganate before ultrafiltration. The dose of oxidizing agents, time of contact with water, and manganese concentration in raw and treated water were monitored. A fully automated ultrafiltration device with membrane module UA-640 (Microdyn-Nadir) was used. A tubular reactor with a static mixer was used to reach a sufficient contact time for water with an oxidizing agent, enabling the oxidation of manganese in water. The concentration of Mn in the

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Carbonell-Alcaina, Carlos, Jose Luis Soler-Cabezas, Amparo Bes-Piá, et al. "Integrated Membrane Process for the Treatment and Reuse of Residual Table Olive Fermentation Brine and Anaerobically Digested Sludge Centrate." Membranes 10, no. 10 (2020): 253. http://dx.doi.org/10.3390/membranes10100253.

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Management of wastewater is a major challenge nowadays, due to increasing water demand, growing population and more stringent regulations on water quality. Wastewaters from food conservation are especially difficult to treat, since they have high salinity and high organic matter concentration. The aim of this work is the treatment of the effluent from a table olive fermentation process (FTOP) with the aim of reusing it once the organic matter is separated. The process proposed in this work consists of the following membrane-based technologies: Ultrafiltration (UF) (UP005, Microdyn Nadir), Forw

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TIAN, JING, KE-KE HUO, CHUN-TIAN ZHANG, and BING-ZHONG REN. "Microdon dentigiganteum sp. nov. and other Microdontinae species (Diptera: Syrphidae) from Northeast China." Zootaxa 4712, no. 1 (2019): 65–76. http://dx.doi.org/10.11646/zootaxa.4712.1.4.

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Hoverflies (Diptera: Syrphidae) of the subfamily Microdontinae were surveyed in Northeast China. A total of six species were identified, including one new to science, Microdon dentigiganteum sp. nov. from Liaoning. This new species has a pair of very large-size posterior calcars on the scutellum and very wide flat tarsi. New records of Metadon spuribifasciatus (Huo, Ren et Zheng, 2007), Microdon analis (Macquart, 1842) and Microdon auricomus Coquillett, 1898 from Jilin province, and Microdon ignotus Violovitsh, 1976 and Microdon oitanus Shiraki, 1930 from Liaoning province are provided. A key

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Heidemann, S. R., P. Lamoureux, and R. E. Buxbaum. "Growth cone behavior and production of traction force." Journal of Cell Biology 111, no. 5 (1990): 1949–57. http://dx.doi.org/10.1083/jcb.111.5.1949.

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The growth cone must push its substrate rearward via some traction force in order to propel itself forward. To determine which growth cone behaviors produce traction force, we observed chick sensory growth cones under conditions in which force production was accommodated by movement of obstacles in the environment, namely, neurites of other sensory neurons or glass fibers. The movements of these obstacles occurred via three, different, stereotyped growth cone behaviors: (a) filopodial contractions, (b) smooth rearward movement on the dorsal surface of the growth cone, and (c) interactions with

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Reemer, Menno. "A review of Microdontinae (Diptera: Syrphidae) of Surinam, with a key to the Neotropical genera." Tijdschrift voor Entomologie 157, no. 1 (2014): 27–57. http://dx.doi.org/10.1163/22119434-00002035.

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The fauna of Microdontinae (Diptera: Syrphidae) of Surinam is reviewed, based on a recent field survey by the author and a re-evaluation of previously collected material, mostly deposited in the RMNH collection (Leiden). A key to all 28 Neotropical genera of the subfamily is given. A total number of 42 species belonging to 13 genera are recorded from Surinam. Habitus photographs of all species are given. Compared with the checklist of Van Doesburg (1966), 24 species are added and five are removed. The following new species are described: Domodon peperpotensis sp. n., Microdon (Microdon) colakr

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Landsman, Adam, Peter A. Blume, Douglas A. Jordan, Dean Vayser, and Andres Gutierrez. "An Open-label, Three-arm Pilot Study of the Safety and Efficacy of Topical Microcyn Rx Wound Care versus Oral Levofloxacin versus Combined Therapy for Mild Diabetic Foot Infections." Journal of the American Podiatric Medical Association 101, no. 6 (2011): 484–96. http://dx.doi.org/10.7547/1010484.

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Background: This randomized, prospective, multicenter, open-label study was designed to test whether a topical, electrolyzed, superoxidized solution (Microcyn Rx) is a safe and effective treatment for mildly infected diabetic foot ulcers. Methods: Sixty-seven patients with ulcers were randomized into three groups. Patients with wounds irrigated with Microcyn Rx alone were compared with patients treated with oral levofloxacin plus normal saline wound irrigation and with patients treated with oral levofloxacin plus Microcyn Rx wound irrigation. Patients were evaluated on day 3, at the end of tre

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Whitty, Jeff M., David L. Morgan, Stirling C. Peverell, Dean C. Thorburn, and Stephen J. Beatty. "Ontogenetic depth partitioning by juvenile freshwater sawfish (Pristis microdon: Pristidae) in a riverine environment." Marine and Freshwater Research 60, no. 4 (2009): 306. http://dx.doi.org/10.1071/mf08169.

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The freshwater sawfish (Pristis microdon) is a critically endangered elasmobranch. Ontogenetic changes in the habitat use of juvenile P. microdon were studied using acoustic tracking in the Fitzroy River, Western Australia. Habitat partitioning was significant between 0+ (2007 year class) and larger 1+ (2006 year class) P. microdon. Smaller 0+ fish generally occupied shallower water (<0.6 m) compared with 1+ individuals, which mainly occurred in depths >0.6 m. Significant differences in hourly depth use were also revealed. The depth that 1+ P. microdon occupied was significantly influenc

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Thompson, S. E., and T. J. Kenchington. "Distribution and diet of Cyclothone microdon (Gonostomatidae) in a submarine canyon." Journal of the Marine Biological Association of the United Kingdom 97, no. 8 (2016): 1573–80. http://dx.doi.org/10.1017/s0025315416000916.

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The primarily bathypelagic gonostomatid Cyclothone microdon, amongst the most abundant of all vertebrates, remains poorly known. We describe its diet in The Gully, a very large submarine canyon off Nova Scotia, Canada, based on the stomach contents of specimens caught by midwater trawl. In The Gully, C. microdon had a shallower distribution than in open ocean and primarily fed at mesopelagic depths. Most of its diet comprised vertically migrant calanoid copepods, while its secondary prey was conchoeciinid ostracods. Both were typical of the food eaten in other regions by its mesopelagic congen

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SCARPARO, GIULIA, ROBERT WOLTON, MARCO MOLFINI, LUIGI CAO PINNA, and ANDREA DI GIULIO. "Comparative morphology of myrmecophilous immature stages of European Microdon species (Diptera: Syrphidae): updated identification key and new diagnostic characters." Zootaxa 4789, no. 2 (2020): 348–70. http://dx.doi.org/10.11646/zootaxa.4789.2.2.

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Hoverflies (Diptera: Syrphidae) of the genus Microdon Meigen have larvae that live in ant nests where they are predatory on ant larvae. Reflecting the exceptional challenges of this very specialized lifestyle, Microdon eggs, larvae and puparia are highly distinctive in their morphology. Detailed descriptions of these immature stages is, however, lacking for all but a very few species, and much of this has been limited through the sole use of light microscopes. Here, using Scanning Electron Microscopy (SEM), we present detailed, comparative descriptions of the immature stages of three European

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Reemer, Menno, and Hariharakrishnan Sankararaman. "Revision of the Oriental species of the hoverfly genus Paramixogaster Brunetti, 1923 (Diptera, Syrphidae, Microdontinae)." ZooKeys 1208 (July 25, 2024): 1–48. http://dx.doi.org/10.3897/zookeys.1208.122829.

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The species of the hoverfly genus Paramixogaster Brunetti, 1923 from the Oriental Region are revised. The resulting number of valid species is 15, of which the following four are described as new: P. halmaherensis Reemer, sp. nov., P. jubata Reemer, sp. nov., P. kodaiana Sankararaman & Reemer, sp. nov., and P. sulawesiana Reemer, sp. nov. Three new synonymies are established: Paramicrodon decipiens de Meijere, 1917, syn. nov. is a junior synonym of Microdon vespiformis de Meijere, 1908; Paramixogaster wegneri Keiser, 1964, syn. nov. is a junior synonym of Ceratophya indica Doleschall, 1857

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Lenz, Alfred C. "Early Devonian graptolites and graptolite biostratigraphy, Arctic Islands, Canada." Canadian Journal of Earth Sciences 50, no. 11 (2013): 1097–115. http://dx.doi.org/10.1139/cjes-2013-0057.

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The Early Devonian graptolite fauna of the Arctic Islands comprises the highest species content (17 species) in the world. In spite of this richness, no new species have been recognized; instead already-existing species, scattered around the then-known continents, suggest that relatively complete cosmopolitanism held sway for graptolites. Canadian Arctic biozonation is very similar to schemes elsewhere, consisting of the uniformis and hercynicus biozones in the Lochkovian, falcarius in the lower Pragian, and an expanded yukonensis Biozone in the upper Pragian and the lower Emsian. Three genera

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Martínez-Borrego, Daily, Elizabeth Arellano, Francisco X. González-Cózatl, Ivan Castro-Arellano, Livia León-Paniagua, and Duke S. Rogers. "Molecular systematics of the Reithrodontomys tenuirostris group (Rodentia: Cricetidae) highlighting the Reithrodontomys microdon species complex." Journal of Mammalogy 103, no. 1 (2021): 29–44. http://dx.doi.org/10.1093/jmammal/gyab133.

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Abstract The Reithrodontomys tenuirostris species group is considered “the most specialized” within the genus Reithrodontomys from morphological and ecological perspectives. Previous studies based on molecular data recommended changes in the taxonomy of the group. In particular, R. microdon has been the most taxonomically questioned, with the suggestion that it constitutes a complex of cryptic species. We analyzed the phylogenetic relationships of the R. tenuirostris species group using DNA sequences from the mitochondrial Cytochrome b gene and Intron 7 of the nuclear beta fibrinogen gene. In

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Delgado, Mónica A., José O. Solbiati, María J. Chiuchiolo, Ricardo N. Farías, and Raúl A. Salomón. "Escherichia coli Outer Membrane Protein TolC Is Involved in Production of the Peptide Antibiotic Microcin J25." Journal of Bacteriology 181, no. 6 (1999): 1968–70. http://dx.doi.org/10.1128/jb.181.6.1968-1970.1999.

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ABSTRACT A Tn5 insertion in tolC eliminated microcin J25 production. The mutation had little effect on the expression of the microcin structural gene and presumably acted by blocking microcin secretion. The tolC mutants carrying multiple copies of the microcin genes were less immune to the microcin. TolC is thus likely a component of a microcin export complex containing the McjD immunity protein, an ABC exporter.

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Trikolidi, F. A., and M. V. Nazarkin. "New data on the Cow Shark teeth (Hexanchiformes) from the Cretaceous deposits of Sakhalin Island (Russia)." Proceedings of the Zoological Institute RAS 320, no. 1 (2016): 66–70. http://dx.doi.org/10.31610/trudyzin/2016.320.1.66.

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The tooth of cow shark of the genus Hexanchus (Hexanchidae) from the Cretaceous (Lower Campanian) deposits of southern Sakhalin Island is described. It is most similar with the teeth, described as Hexanchus microdon (Agassiz, 1835) or H. cf. microdon from the Upper Cretaceous of Japan. Previously shark teeth from the Cretaceous deposits of the Russian Far East not described.

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Paulsen, Teressa, Pumoli Malapati, Yoshiyuki Shibata, et al. "MicroDNA levels are dependent on MMEJ, repressed by c-NHEJ pathway, and stimulated by DNA damage." Nucleic Acids Research 49, no. 20 (2021): 11787–99. http://dx.doi.org/10.1093/nar/gkab984.

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Abstract Extrachromosomal circular DNA (eccDNA) are present within all eukaryotic organisms and actively contribute to gene expression changes. MicroDNA (200-1000bp) are the most abundant type of eccDNA and can amplify tRNA, microRNA, and novel si-like RNA sequences. Due to the heterogeneity of microDNA and the limited technology to directly quantify circular DNA molecules, the specific DNA repair pathways that contribute to microDNA formation have not been fully elucidated. Using a sensitive and quantitative assay that quantifies eight known abundant microDNA, we report that microDNA levels a

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Rodríguez, Eliana, Carina Gaggero, and Magela Laviña. "The Structural Gene for Microcin H47 Encodes a Peptide Precursor with Antibiotic Activity." Antimicrobial Agents and Chemotherapy 43, no. 9 (1999): 2176–82. http://dx.doi.org/10.1128/aac.43.9.2176.

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ABSTRACT Microcin H47 is a bactericidal antibiotic produced by a naturally occurring Escherichia coli strain isolated in Uruguay. The microcin genetic system is located in the chromosome and extends over a 10-kb DNA segment containing the genes required for microcin synthesis, secretion, and immunity. The smallest microcin synthesis gene,mchB, was sequenced and shown to encode a highly hydrophobic peptide. An mchB-phoA gene fusion, which directed the synthesis of a hybrid bifunctional protein with both PhoA and microcin H47-like activities, was isolated. The results presented herein lead us to

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Reemer, Menno, and Hariharakrishnan Sankararaman. "Revision of the Oriental species of the hoverfly genus Paramixogaster Brunetti, 1923 (Diptera, Syrphidae, Microdontinae)." ZooKeys 1208 (July 25, 2024): 1–48. https://doi.org/10.3897/zookeys.1208.122829.

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The species of the hoverfly genus <i>Paramixogaster</i> Brunetti, 1923 from the Oriental Region are revised. The resulting number of valid species is 15, of which the following four are described as new: <i>P. halmaherensis</i> Reemer, sp. nov., <i>P. jubata</i> Reemer, sp. nov., <i>P. kodaiana</i> Sankararaman & Reemer, sp. nov., and <i>P. sulawesiana</i> Reemer, sp. nov. Three new synonymies are established: <i>Paramicrodon decipiens</i> de Meijere, 1917, syn. nov. is a junior synonym of <i>Microdon vespiformis</i> de Meijere, 1908; <i>Paramixogaster wegneri</i> Keiser, 1964, syn. nov. i

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Rodríguez, Eliana, and Magela Laviña. "Genetic analysis of microcin H47 immunity." Canadian Journal of Microbiology 44, no. 7 (1998): 692–97. http://dx.doi.org/10.1139/w98-044.

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Microcin H47 is a bactericidal antibiotic produced by a natural Escherichia coli isolate. The genetic system encoding microcin production and immunity consists of at least seven clustered genes. Four of these are devoted to microcin biosynthesis and two genes are required for its secretion into the extracellular medium. The product of the seventh gene, mchI, determines the cell's self-immunity. This gene was shown to encode a highly hydrophobic 69-residue peptide. Analysis of the MchI amino acid sequence, as well as the characterization of MchIPhoA hybrid proteins, indicated that the microcin

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Hartley, I. H. "SELAGINACEAE." Bothalia 21, no. 1 (1991): 57–59. http://dx.doi.org/10.4102/abc.v21i1.862.

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Lagos, Rosalba, Jorge E. Villanueva, and Octavio Monasterio. "Identification and Properties of the Genes Encoding Microcin E492 and Its Immunity Protein." Journal of Bacteriology 181, no. 1 (1999): 212–17. http://dx.doi.org/10.1128/jb.181.1.212-217.1999.

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ABSTRACT The gene coding for the immunity protein (mceB) and the structural gene of microcin E492 (mceA), a low-molecular-weight channel-forming bacteriocin produced by a strain of Klebsiella pneumoniae, have been characterized. The microcin gene codes for a precursor protein of either 99 or 103 amino acids. Protein sequencing of the N-terminal region of microcin E492 unequivocally identified this gene as the microcin structural gene and indicated that this microcin is synthesized as a precursor protein that is cleaved at either amino acid 15 or 19, at a site resembling the double-glycine moti

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Reemer, Menno, Jeffrey H. Skevington, and Scott Kelso. "Revision of the Neotropical hoverfly genus Peradon Reemer (Diptera, Syrphidae, Microdontinae)." ZooKeys 896 (December 5, 2019): 1–93. http://dx.doi.org/10.3897/zookeys.896.36493.

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The species of the Neotropical hoverfly genus Peradon Reemer, 2013 are revised, based on morphological characters with aid of mitochondrial DNA barcodes. The resulting number of valid species is increased to 31, of which the following seven are described as new: P. ballux Reemer, sp. nov., P. brevis Reemer, sp. nov., P. costaricensis Reemer, sp. nov., P. notialus Reemer, sp. nov., P. palpator Reemer, sp. nov., P. pompiloides Reemer, sp. nov., and P. surinamensis Reemer, sp. nov. Two new synonymies are established: Microdon langi Curran, 1925, syn. nov. and Microdon flavomarginatum Curran, 1925

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Reemer, Menno, Jeffrey H. Skevington, and Scott Kelso. "Revision of the Neotropical hoverfly genus Peradon Reemer (Diptera, Syrphidae, Microdontinae)." ZooKeys 896 (December 5, 2019): 1–93. https://doi.org/10.3897/zookeys.896.36493.

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The species of the Neotropical hoverfly genus Peradon Reemer, 2013 are revised, based on morphological characters with aid of mitochondrial DNA barcodes. The resulting number of valid species is increased to 31, of which the following seven are described as new: P. ballux Reemer, sp. nov., P. brevis Reemer, sp. nov., P. costaricensis Reemer, sp. nov., P. notialus Reemer, sp. nov., P. palpator Reemer, sp. nov., P. pompiloides Reemer, sp. nov., and P. surinamensis Reemer, sp. nov. Two new synonymies are established: Microdon langi Curran, 1925, syn. nov. and Microdon flavomarginatum Curran, 1925

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Mercado, Gabriela, Mario Tello, Macarena Marín, Octavio Monasterio, and Rosalba Lagos. "The Production In Vivo of Microcin E492 with Antibacterial Activity Depends on Salmochelin and EntF." Journal of Bacteriology 190, no. 15 (2008): 5464–71. http://dx.doi.org/10.1128/jb.00351-08.

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ABSTRACT Microcin E492 is a channel-forming bacteriocin that is found in two forms, namely, a posttranslationally modified form obtained by the covalent linkage of salmochelin-like molecules to serine 84 and an unmodified form. The production of modified microcin E492 requires the synthesis of enterochelin, which is subsequently glycosylated by MceC and converted into salmochelin. mceC mutants produced inactive microcin E492, and this phenotype was reversed either by complementation with iroB from Salmonella enterica or by the addition of exogenous salmochelin. Cyclic salmochelin uptake by Esc

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Vassiliadis, Gaëlle, Jean Peduzzi, Séverine Zirah, Xavier Thomas, Sylvie Rebuffat, and Delphine Destoumieux-Garzón. "Insight into Siderophore-Carrying Peptide Biosynthesis: Enterobactin Is a Precursor for Microcin E492 Posttranslational Modification." Antimicrobial Agents and Chemotherapy 51, no. 10 (2007): 3546–53. http://dx.doi.org/10.1128/aac.00261-07.

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ABSTRACT Microcin E492-producing bacteria secrete both unmodified and posttranslationally modified microcins. The modification consists of a C-glucosylated linear trimer of N-(2,3-dihydroxybenzoyl)-l-serine, a catecholate siderophore related to salmochelins and enterobactin. We show here that repression of enterobactin biosynthesis inhibits the acquisition of microcin E492 posttranslational modification, as monitored by high-performance liquid chromatography and mass spectrometry. Furthermore, exogenous enterobactin restored the production of posttranslationally modified microcin in a bacteria

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Delgado, Mónica A., Paula A. Vincent, Ricardo N. Farías, and Raúl A. Salomón. "YojI of Escherichia coli Functions as a Microcin J25 Efflux Pump." Journal of Bacteriology 187, no. 10 (2005): 3465–70. http://dx.doi.org/10.1128/jb.187.10.3465-3470.2005.

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ABSTRACT In the present study, we showed that yojI, an Escherichia coli open reading frame with an unknown function, mediates resistance to the peptide antibiotic microcin J25 when it is expressed from a multicopy vector. Disruption of the single chromosomal copy of yojI increased sensitivity of cells to microcin J25. The YojI protein was previously assumed to be an ATP-binding-cassette-type exporter on the basis of sequence similarities. We demonstrate that YojI is capable of pumping out microcin molecules. Thus, one obvious explanation for the protective effect against microcin J25 is that Y

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Trujillo, Mónica, Eliana Rodrı́guez, and Magela Laviña. "ATP Synthase Is Necessary for Microcin H47 Antibiotic Action." Antimicrobial Agents and Chemotherapy 45, no. 11 (2001): 3128–31. http://dx.doi.org/10.1128/aac.45.11.3128-3131.2001.

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ABSTRACT Microcin H47 is a gene-encoded peptide antibiotic produced by a natural Escherichia coli strain isolated in Uruguay. In order to identify cellular components necessary for its antibiotic action, microcin H47-resistant mutants isolated in this work, as well as previously described mutants affected in membrane proteins, were analyzed. These studies indicated that (i) receptor outer membrane proteins for ferric-catechol siderophores would be involved in microcin-specific binding to the cell surface, (ii) the TonB pathway is needed for microcin H47 uptake, and (iii) the presence of the AT

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Marines-Macías, Tania, Pablo Colunga-Salas, and Livia León-Paniagua. "Reithrodontomys microdon (Rodentia: Cricetidae)." Mammalian Species 54, no. 1020 (2022): 1–8. https://doi.org/10.1093/mspecies/seac005.

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Marines-Macías, Tania, Colunga-Salas, Pablo, León-Paniagua, Livia (2022): Reithrodontomys microdon (Rodentia: Cricetidae). Mammalian Species 54 (1020): 1-8, DOI: 10.1093/mspecies/seac005, URL: http://dx.doi.org/10.1093/mspecies/seac005

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Ranai, K. "MICRODOS." ACM SIGSMALL/PC Notes 12, no. 2 (1986): 15–26. http://dx.doi.org/10.1145/382158.383031.

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Thompson, F. Christian. "A new Microdon ant fly from Sri Lanka (Diptera: Microdontidae)." Entomologist's Monthly Magazine 156, no. 2 (2020): 87–91. http://dx.doi.org/10.31184/m00138908.1562.4029.

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Reemer, Menno, and Gunilla Stahls. "Generic revision and species classification of the Microdontinae (Diptera, Syrphidae)." ZooKeys 288 (April 12, 2013): 1–213. https://doi.org/10.3897/zookeys.288.4095.

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With 552 species group names available (excluding misspellings), the Microdontinae constitute the smallest of the three subfamilies of Syrphidae. Paradoxically, this subfamily is taxonomically the least organized of the three: 388 species names were previously classified in a single genus, <i>Microdon</i> Meigen, 1803. The present paper introduces a new generic classification of the Microdontinae, relying partly on the results of phylogenetic analyses of morphological and molecular data as published in other papers, and partly on examination of primary type specimens of 347 taxa, plus addition

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Carlson, Steve A., Timothy S. Frana, and Ronald W. Griffith. "Antibiotic Resistance in Salmonella enterica Serovar Typhimurium Exposed to Microcin-Producing Escherichia coli." Applied and Environmental Microbiology 67, no. 8 (2001): 3763–66. http://dx.doi.org/10.1128/aem.67.8.3763-3766.2001.

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ABSTRACT Microcin 24 is an antimicrobial peptide secreted by uropathogenicEscherichia coli. Secretion of microcin 24 provides an antibacterial defense mechanism for E. coli. In a plasmid-based system using transformed Salmonella enterica, we found that resistance to microcin 24 could be seen in concert with a multiple-antibiotic resistance phenotype. This multidrug-resistant phenotype appeared when Salmonella was exposed to an E. coli strain expressing microcin 24. Therefore, it appears that multidrug-resistant Salmonellacan arise as a result of an insult from other pathogenic bacteria.

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