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Journal articles on the topic 'Sedimentation modes'

Author: Grafiati

Published: 4 June 2021

Last updated: 14 February 2022

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1

Hernando, Louis, Aziz Omari, and David Reungoat. "Experimental study of sedimentation of concentrated mono-disperse suspensions: Determination of sedimentation modes." Powder Technology 258 (May 2014): 265–71. http://dx.doi.org/10.1016/j.powtec.2014.03.037.

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XIA, ZHENHUA, KEVIN W. CONNINGTON, SAIKIRAN RAPAKA, PENGTAO YUE, JAMES J. FENG, and SHIYI CHEN. "Flow patterns in the sedimentation of an elliptical particle." Journal of Fluid Mechanics 625 (April 14, 2009): 249–72. http://dx.doi.org/10.1017/s0022112008005521.

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We study the dynamics of a single two-dimensional elliptical particle sedimenting in a Newtonian fluid using numerical simulations. The main emphasis in this work is to study the effect of boundaries on the flow patterns observed during sedimentation. The simulations were performed using a multi-block lattice Boltzmann method as well as a finite-element technique and the results are shown to be consistent. We have conducted a detailed study on the effects of density ratio, aspect ratio and the channel blockage ratio on the flow patterns during sedimentation. As the channel blockage ratio is va

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Gubaidullin, Damir, Rinat Zaripov, and Liudmila Tkachenko. "Dynamics of nonlinear waves in the tubes filled with aerosol." MATEC Web of Conferences 148 (2018): 01002. http://dx.doi.org/10.1051/matecconf/201814801002.

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The results of experimental investigations of nonlinear oscillations of finely dispersed aerosol in the tube with various geometry on the end in the shock-wave, the shock-free wave modes and in the mode of transition to shock waves near the resonance frequency are presented. The time dependences of the numerical concentration of the oscillating aerosol droplets are presented. The effect of the frequency and amplitude of the piston displacement and the influence of the diaphragm internal diameter on the time coagulation and sedimentation of aerosol were studied. An increase in the amplitude of

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Shen, Liang, Han Xiao, Wan Qiu Yang, De Ren Miao, and Xiao Ming Li. "Study on Biological Aerated Filter as Enhanced Pretreatment Process of Coagulation and Sedimentation." Advanced Materials Research 726-731 (August 2013): 1940–44. http://dx.doi.org/10.4028/www.scientific.net/amr.726-731.1940.

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Using coagulation and sedimentation process in the advanced treatment of urban secondary effluent which can be recycled to circulating cooling water system in power plant is only perform well on CODCrand turbidity removal. But the concentrations of organic matter and NH3in effluent can not meet the requirements of circulating cooling water. Therefore, in this study, the feasibility of biological aerated filter (BAF) as a pretreatment enhancing coagulation and sedimentation process was discussed. Achieved by controlling the two operating modes: (1) secondary effluentcoagulation and sedimentatio

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Minelli, Caterina, Aneta Sikora, Raul Garcia-Diez, Katia Sparnacci, Christian Gollwitzer, Michael Krumrey, and Alex G. Shard. "Measuring the size and density of nanoparticles by centrifugal sedimentation and flotation." Analytical Methods 10, no. 15 (2018): 1725–32. http://dx.doi.org/10.1039/c8ay00237a.

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Dietze, E., F. Maussion, M. Ahlborn, B. Diekmann, K. Hartmann, K. Henkel, T. Kasper, G. Lockot, S. Opitz, and T. Haberzettl. "Sediment transport processes across the Tibetan Plateau inferred from robust grain size end-members in lake sediments." Climate of the Past Discussions 9, no. 4 (August 21, 2013): 4855–92. http://dx.doi.org/10.5194/cpd-9-4855-2013.

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Abstract. Grain size distributions offer powerful proxies of past environmental conditions that are related to sediment sorting processes. However, they are often of multimodal character because sediments can get mixed during deposition. To facilitate the use of grain size as palaeoenvironmental proxy this study aims to distinguish the main detrital processes that contribute to lacustrine sedimentation across the Tibetan Plateau using grain size end-member modelling analysis. Between three and five robust grain size end-member subpopulations were distinguished at different sites from similarly

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Dietze, E., F. Maussion, M. Ahlborn, B. Diekmann, K. Hartmann, K. Henkel, T. Kasper, G. Lockot, S. Opitz, and T. Haberzettl. "Sediment transport processes across the Tibetan Plateau inferred from robust grain-size end members in lake sediments." Climate of the Past 10, no. 1 (January 16, 2014): 91–106. http://dx.doi.org/10.5194/cp-10-91-2014.

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Abstract. Grain-size distributions offer powerful proxies of past environmental conditions that are related to sediment sorting processes. However, they are often of multimodal character because sediments can get mixed during deposition. To facilitate the use of grain size as palaeoenvironmental proxy, this study aims to distinguish the main detrital processes that contribute to lacustrine sedimentation across the Tibetan Plateau using grain-size end-member modelling analysis. Between three and five robust grain-size end-member subpopulations were distinguished at different sites from similarl

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Teťák, František. "The gravity flow dynamics of submarine fan sedimentation in the Magura Basin of the Western Carpathians (Magura Nappe, Slovakia)." Geologica Carpathica 61, no. 3 (June 1, 2010): 201–9. http://dx.doi.org/10.2478/v10096-010-0011-6.

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The gravity flow dynamics of submarine fan sedimentation in the Magura Basin of the Western Carpathians (Magura Nappe, Slovakia)This article deals with the dynamics of the deep-water gravity flows sedimentation within the Magura Formation. This investigation is based on analysis of the Magura sandstone sedimentary structures studied on the outcrops. The final comparison of the sedimentary structures and cycles with the paleocurrent directions provided an interpretation of the gravity flows dynamics and helped to restore the migration of the sandy lobes in space and time. Three modes of sedimen

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V. I. Donenko, O. M. Nazarenko, I. A. Nazarenko, M. P. Marchenko, and V. P. Sulima. "Technical advantages of the city sedimentation water reconstruction system." Ways to Improve Construction Efficiency, no. 45 (October 16, 2020): 26–36. http://dx.doi.org/10.32347/2707-501x.2020.45.26-36.

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The work designs a system of production components of urban infrastructure to create an energy efficient city. Hydraulic, hydrological, heat exchange processes of interaction of water structure and elements of treatment structures for centrifugal deposition of suspended matter have been investigated. Depending on the degree of contamination, devices for resource recovery are calculated. The duration of recovery operations was investigated. The technological cycle of re-water recovery and the number of cycles of cavitation generator for controlled conditioning of conditionally clean and dirty w

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10

Kidwell, Susan M. "Models for fossil concentrations: paleobiologic implications." Paleobiology 12, no. 1 (1986): 6–24. http://dx.doi.org/10.1017/s0094837300002943.

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Four basic types of skeletal concentrations are modeled in terms of changes in sedimentation rate alone. The model categorizes fossil concentrations on the relatively objective basis of their bed contacts, and uses this criterion to infer directional shifts in net sedimentation. This radical simplification of accumulation histories, in which hardpart input is held constant, yields a surprisingly powerful model capable of predicting a broad spectrum of taphonomic and paleobiologic phenomena. Type I concentrations grade from less fossiliferous sediments and terminate in omission surfaces; if har

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11

Marcou, Olivier, Bastien Chopard, Samira El Yacoubi, Boussad Hamroun, Laurent Lefèvre, and Eduardo Mendes. "A Lattice Boltzmann Model to Study Sedimentation Phenomena in Irrigation Canals." Communications in Computational Physics 13, no. 3 (March 2013): 880–99. http://dx.doi.org/10.4208/cicp.371011.260112s.

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AbstractFresh water is one of the most significant resources for human activities and survival, and irrigation is among the most important uses of water. The sustainibility and performance of irrigation canals can be greatly affected by sediment transport and deposition. In our previous works, we proposed a Lattice Boltzmann model for simulating a free surface flow in an irrigation canal, as an alternative to more traditional models mainly based on shallow water equations. Here we introduce the sedimentation phenomenon into our model by adding a new algorithm, based on the earlier work by B. C

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Gruziel-Słomka, Magdalena, Paweł Kondratiuk, Piotr Szymczak, and Maria L. Ekiel-Jeżewska. "Stokesian dynamics of sedimenting elastic rings." Soft Matter 15, no. 36 (2019): 7262–74. http://dx.doi.org/10.1039/c9sm00598f.

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We study numerically the dynamics of elastic microfilaments which form closed loops and settle under gravity in a viscous fluid. We observe diversity of periodic and stationary sedimentation modes, dependent on flexibility and initial configuration.

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13

Weisenstein, D. K., J. E. Penner, M. Herzog, and X. Liu. "Global 2-D intercomparison of sectional and modal aerosol modules." Atmospheric Chemistry and Physics 7, no. 9 (May 8, 2007): 2339–55. http://dx.doi.org/10.5194/acp-7-2339-2007.

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Abstract. We present an intercomparison of several aerosol modules, sectional and modal, in a global 2-D model in order to differentiate their behavior for tropospheric and stratospheric applications. We model only binary sulfuric acid-water aerosols in this study. Three versions of the sectional model and three versions of the modal model are used to test the sensitivity of background aerosol mass and size distribution to the number of bins or modes and to the prescribed width of the largest mode. We find modest sensitivity to the number of bins (40 vs. 150) used in the sectional model. Aeros

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Nascimento, Alexandre Ferreira do, Sheila Aparecida Correia Furquim, Eduardo Guimarães Couto, Raphael Moreira Beirigo, Jairo Calderari de Oliveira Júnior, Plínio Barbosa de Camargo, and Pablo Vidal-Torrado. "Genesis of textural contrasts in subsurface soil horizons in the Northern Pantanal-Brazil." Revista Brasileira de Ciência do Solo 37, no. 5 (October 2013): 1113–27. http://dx.doi.org/10.1590/s0100-06832013000500001.

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The Pantanal region can be characterized as a quaternary floodplain with predominant sedimentation in the form of alluvial fans. In the geomorphologic and sedimentary evolution, the avulsion process is inherent to this depositional system and its dynamics, together with surface water floods, influence soil sedimentation on this plain. The knowledge and differentiation of these two events can contribute to a better understanding of the variability of soil properties and distribution under the influence of these sedimentation processes. Therefore, this study investigated the genesis of soils in

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Weisenstein, D. K., J. E. Penner, M. Herzog, and X. Liu. "Global 2-D intercomparison of sectional and modal aerosol modules." Atmospheric Chemistry and Physics Discussions 6, no. 6 (December 7, 2006): 12729–67. http://dx.doi.org/10.5194/acpd-6-12729-2006.

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Abstract. We present an intercomparison of two aerosol modules, one sectional, one modal, in a global 2-D model in order to differentiate their behavior for tropospheric and stratospheric applications. We model only binary sulfuric acid-water aerosols in this study. Two versions of the sectional model and three versions of the modal model are used to test the sensitivity of background aerosol mass and size distribution to the number of bins or modes and to the prescribed width of the largest mode. We find modest sensitivity to the number of bins (40 vs 150) used in the sectional model. Aerosol

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16

Ksenofontov, B., E. Senik, and M. Ivanov. "Analysis of hydraulic modes of operation of the divergent plates block of the flotation-sedimentation tank." IOP Conference Series: Materials Science and Engineering 492 (March 13, 2019): 012024. http://dx.doi.org/10.1088/1757-899x/492/1/012024.

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17

Meldahl, Keith H. "Biogenic and Physical Modes of Stratification and Shell Bed Formation in the Recent Intertidal Environments of Bahia la Choya, Northern Gulf of California." Paleontological Society Special Publications 2 (1987): 177–88. http://dx.doi.org/10.1017/s2475262200004809.

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Fossil concentrations such as shell beds are preferred collection sites for paleontological and paleoecological data. Although ample attention has been paid to the roles and implications of physical processes in shell bed formation, the role of biogenic sediment reworking in generating shell beds has received little study.Subsurface shell beds in the Recent intertidal environment at Bahia la Choya form via three distinct processes: storm deposition, tidal channel migration, and biogenic reworking. Shell beds on the outer tidal flats are produced primarily by storm sedimentation. Lateral migrat

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18

Shao, Yun-Chuan, Chen-Yen Hung, and Yi-Ju Chou. "Numerical study of convective sedimentation through a sharp density interface." Journal of Fluid Mechanics 824 (July 6, 2017): 513–49. http://dx.doi.org/10.1017/jfm.2017.349.

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We conduct numerical simulations using the Eulerian–Lagrangian approach to investigate the formation of the leaking, finger, and stable-settling modes in convective sedimentation when a sediment-laden fluid layer descends through a sharply stratified ambient flow. We show that the temporal evolution of the sedimentation process for the leaking mode can be divided into three stages, including (in temporal order) Rayleigh–Taylor instability, convection, and leaking stages. The presence of sheet-like descending plumes of suspended particles is an important characteristic of the leaking mode, whic

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19

Doroshenko, Ya V., О. М. Karpash, and B. N. Hozhaiev. "The Investigation of the Composition of Pipeline Gas-liquid Flows and the Effect of Their Harmful Impurities on the Modes of Pumping, Energy Requirements of Transportation n." Prospecting and Development of Oil and Gas Fields, no. 4(73) (December 30, 2019): 35–45. http://dx.doi.org/10.31471/1993-9973-2019-4(73)-35-45.

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Based on the analysis of the composition of gas-liquid flows of various pipelines (trunk, field and gathering gas pipelines, oil pipelines, heat pipelines, water pipelines), it is established that diverse harmful impurities are contained in the interior of almost all operated metal pipelines, regardless of the purpose of pipelines use. In most cases, pipelines contain a complex multicomponent mixture of harmful impurities of various origins: gas conden-sate, water, machine oil, products of in-line corrosion, rock particles removed from the well, incrustation exfoliat-ed from the pipes, paraffi

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20

Nowaczyk, N. R., E. M. Haltia, D. Ulbricht, V. Wennrich, M. A. Sauerbrey, P. Rosén, H. Vogel, et al. "Chronology of Lake El'gygytgyn sediments." Climate of the Past Discussions 9, no. 3 (June 7, 2013): 3061–102. http://dx.doi.org/10.5194/cpd-9-3061-2013.

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Abstract. A 318 m long sedimentary profile drilled by the International Continental Scientific Drilling Program (ICDP) at Site 5011-1 in Lake El'gygytgyn, Far East Russian Arctic, has been analysed for its sedimentologic response to global climate modes by chrono-stratigraphic methods. The 12 km wide lake is sited in an 18 km large crater that was created by the impact of a meteorite 3.58 Ma ago. Since then sediments have been continuously deposited. For establishing their chronology, major reversals of the Earth's magnetic field provided initial tie points for the age model, confirming that t

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Hyun, Sangmin, Jang Jun Bahk, Bong-Chool Suk, and Byong-Kwon Park. "Alternative modes of Quaternary pelagic biosiliceous and carbonate sedimentation: A perspective from the East Sea (Japan Sea)." Palaeogeography, Palaeoclimatology, Palaeoecology 247, no. 1-2 (April 2007): 88–99. http://dx.doi.org/10.1016/j.palaeo.2006.11.023.

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22

Blaszczyk, Pawel, and Richard M. Ashley. "Application of new criteria to control sediment problems in combined sewers in Poland." Water Science and Technology 33, no. 9 (April 1, 1996): 245–52. http://dx.doi.org/10.2166/wst.1996.0222.

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The Polish criteria for design and operation to control sediments in combined sewers may now be replaced to reflect new knowledge. A series of field investigations have been carried out to examine the occurrence and nature of sediments in sewers in Warsaw. Using the results of these studies and new UK approaches to the control of sedimentation in sewers, new simplified criteria have been defined based on different modes of sediment transport and relative sewer sizes.

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23

Rosemeier, Juliane, and Peter Spichtinger. "Pattern formation in clouds via Turing instabilities." Mathematics of Climate and Weather Forecasting 6, no. 1 (January 1, 2020): 75–96. http://dx.doi.org/10.1515/mcwf-2020-0104.

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AbstractPattern formation in clouds is a well-known feature, which can be observed almost every day. However, the guiding processes for structure formation are mostly unknown, and also theoretical investigations of cloud patterns are quite rare. From many scientific disciplines the occurrence of patterns in non-equilibrium systems due to Turing instabilities is known, i.e. unstable modes grow and form spatial structures. In this study we investigate a generic cloud model for the possibility of Turing instabilities. For this purpose, the model is extended by diffusion terms. We can show that fo

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Krishnappan, B. G. "Modelling of settling and flocculation of fine sediments in still water." Canadian Journal of Civil Engineering 17, no. 5 (October 1, 1990): 763–70. http://dx.doi.org/10.1139/l90-089.

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A numerical model to predict settling behaviour of fine sediment mixtures in a stagnant water column is described. Both single-grain settling mode and the floc settling mode are considered. The single-grain settling mode is analyzed by solving the unsteady, one-dimensional diffusion–advection equation numerically and the floc settling mode is examined by solving a coagulation equation expressed as a discrete equation in logarithmic radius space considering the differential settling as the only collision mechanism. The model results are compared with the laboratory experimental data of K. Kranc

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Nowaczyk, N. R., E. M. Haltia, D. Ulbricht, V. Wennrich, M. A. Sauerbrey, P. Rosén, H. Vogel, et al. "Chronology of Lake El'gygytgyn sediments – a combined magnetostratigraphic, palaeoclimatic and orbital tuning study based on multi-parameter analyses." Climate of the Past 9, no. 6 (November 1, 2013): 2413–32. http://dx.doi.org/10.5194/cp-9-2413-2013.

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Abstract. A 318-metre-long sedimentary profile drilled by the International Continental Scientific Drilling Program (ICDP) at Site 5011-1 in Lake El'gygytgyn, Far East Russian Arctic, has been analysed for its sedimentologic response to global climate modes by chronostratigraphic methods. The 12 km wide lake is sited off-centre in an 18 km large crater that was created by the impact of a meteorite 3.58 Ma ago. Since then sediments have been continuously deposited. For establishing their chronology, major reversals of the earth's magnetic field provided initial tie points for the age model, con

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BLIGNAULT, H. J., and J. N. THERON. "MODES OF SEDIMENTATION AND GLACIOLOGICAL ASPECTS OF THE PERMO-CARBONIFEROUS DWYKA GROUP IN THE ELANDSVLEI - ELANDSDRIF AREA, SOUTH AFRICA." South African Journal of Geology 115, no. 2 (June 1, 2012): 211–24. http://dx.doi.org/10.2113/gssajg.115.2.211.

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MEIER, J. A., J. S. JEWELL, C. E. BRENNEN, and J. IMBERGER. "Bubbles emerging from a submerged granular bed." Journal of Fluid Mechanics 666 (January 6, 2011): 189–203. http://dx.doi.org/10.1017/s002211201000443x.

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This paper explores the phenomena associated with the emergence of gas bubbles from a submerged granular bed. While there are many natural and industrial applications, we focus on the particular circumstances and consequences associated with the emergence of methane bubbles from the beds of lakes and reservoirs since there are significant implications for the dynamics of lakes and reservoirs and for global warming. This paper describes an experimental study of the processes of bubble emergence from a granular bed. Two distinct emergence modes are identified, mode 1 being simply the percolation

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Pang, Xiongqi, Ian Lerche, Haiyan Zhou, and Zhengxue Jiang. "Hydrocarbon Accumulation Control by Predominant Migration Pathways." Energy Exploration & Exploitation 21, no. 3 (June 2003): 167–86. http://dx.doi.org/10.1260/014459803769520034.

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Geological analysis and physical analogy experiments indicate that, under geological conditions, hydrocarbon tends to migrate along a path of least resistance and attempt to follow the largest buoyancy component. There are four generalized modes of possible transport. First, hydrocarbons tends to migrate along the pathways with high porosity and permeability, and with a large grade difference relative to surrounding rocks (grade difference predominance); second, hydrocarbons tends to migrate in the opposite direction in overlying formations to the nadir of the sedimentation centre (divided syn

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Сеник, E. Senik, Виноградов, M. Vinogradov, Таранов, R. Taranov, Козодаев, et al. "Rare Earth Metals Leaching from Coal Ash and Theirs Concentration." Safety in Technosphere 5, no. 1 (February 25, 2016): 48–55. http://dx.doi.org/10.12737/19023.

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Problems related to rare earth metals leaching from coal ash and theirs ion-exchange concentration from sulfuric solutions, in particular the characteristics of scandium, yttrium and lanthanum sorption by different ion exchange resins have been considered in this work. It has been shown that the best way to leach rare earth metals from coal ash is a complex acid and biological treatment of ash waste. Kinetics related to the process of scandium, yttrium and lanthanum acid leaching from ash and slag waste of CHPP in Kumertau has been investigated. Subsequent metal solutions concentration was ach

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PEDERNERA, TOMÁS E., ADRIANA C. MANCUSO, CECILIA A. BENAVENTE, and EDUARDO G. OTTONE. "PLANT TAPHONOMY IN A LAKE AFFECTED BY VOLCANISM (AGUA DE LA ZORRA FORMATION, UPPER TRIASSIC) MENDOZA, ARGENTINA." PALAIOS 35, no. 6 (June 26, 2020): 245–61. http://dx.doi.org/10.2110/palo.2019.104.

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ABSTRACT Volcanic eruptions have an impact on the paleoecology of plant communities and their preservation in the fossil record. The aim of this contribution is to evaluate the influence of volcanism on plant preservation in lacustrine settings via systematic sampling and chemical analyses of fossil plants in the Upper Triassic Agua de la Zorra Formation, of the Argentinian Cuyana Basin. Plant remains are not uniformly preserved throughout the Agua de la Zorra Formation and their stratigraphic distribution reflects the original spatial pattern of the plant communities. SEM-EDX analyses was use

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KHALIL, HANY, and RICARDO VILLOTA. "The Effect of Microwave Sublethal Heating on the Ribonucleic Acids of Staphylococcus aureus." Journal of Food Protection 52, no. 8 (August 1, 1989): 544–48. http://dx.doi.org/10.4315/0362-028x-52.8.544.

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The effect of microwave sublethal heat injury on the integrity of S. aureus FRI-100 RNA was examined. The extent of damage to RNA during sublethal microwave heat injury was greater than that occurring as a result of conventional sublethal heating. Although both heating modes resulted in the destruction of the 16S RNA, only those cells heated with microwave energy suffered lesions in their 23S RNA. When cells were allowed to recover, the conventionally heated cells regained normal profiles of the 16S and the 23S RNA after 180 min on the recovery medium. Microwave heated cells restored their 16S

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Schwamborn, Georg, Kai Hartmann, Bernd Wünnemann, Wolfgang Rösler, Annette Wefer-Roehl, Jörg Pross, Marlen Schlöffel, et al. "Sediment history mirrors Pleistocene aridification in the Gobi Desert (Ejina Basin, NW China)." Solid Earth 11, no. 4 (July 23, 2020): 1375–98. http://dx.doi.org/10.5194/se-11-1375-2020.

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Abstract. Central Asia is a large-scale source of dust transport, but it also held a prominent changing hydrological system during the Quaternary. A 223 m long sediment core (GN200) was recovered from the Ejina Basin (synonymously Gaxun Nur Basin) in NW China to reconstruct the main modes of water availability in the area during the Quaternary. The core was drilled from the Heihe alluvial fan, one of the world's largest alluvial fans, which covers a part of the Gobi Desert. Grain-size distributions supported by endmember modelling analyses, geochemical–mineralogical compositions (based on XRF

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Lee, Dong-Jin, and Robert J. Elias. "Mode of growth and life-history strategies of a Late Ordovician halysitid coral." Journal of Paleontology 65, no. 2 (March 1991): 191–99. http://dx.doi.org/10.1017/s0022336000020424.

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The upper surface of the corallum ofCatenipora rubrawas often at or just above the sediment-water interface during life. The vertical growth rate was barely sufficient to keep pace with background sedimentation and possible subsidence of the corallum. Therefore, the colonies were in constant danger of being covered by influxes of sediment, especially during storms. This was compensated by the ability of polyps to respond to sedimentation events and by certain aspects of colony growth. Rapid regeneration following partial mortality involved budding of uninjured polyps and rejuvenation of damage

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Varga, G., J. Kovács, and G. Újvári. "Late Pleistocene variations of the background aeolian dust concentration in the Carpathian Basin: an estimate using decomposition of grain-size distribution curves of loess deposits." Netherlands Journal of Geosciences - Geologie en Mijnbouw 91, no. 1-2 (September 2013): 159–71. http://dx.doi.org/10.1017/s0016774600001566.

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AbstractAeolian dust deposits can be considered as one of the most important archives of past climatic changes. Alternating loess and paleosol strata display variations of the dust load in the Pleistocene atmosphere. By using the observations of recent dust storms, we are able to employ Late Pleistocene stratigraphic datasets (with accurate chronological framework) and detailed granulometric data for making conclusions on the atmospheric dust load in the past. Age-depths models, created from the absolute age data and stratigraphic interpretation, allow us to calculate sedimentation rates and d

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Rai, Bijendra Kumar, SU Kafle, and A. Sundas. "A case of abdominal tuberculosis diagnosed by fine needle aspiration cytology (FNAC) of mesenteric lymph node." Health Renaissance 13, no. 3 (August 7, 2017): 177–80. http://dx.doi.org/10.3126/hren.v13i3.17966.

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Background: The modes of presentation of abdominal tuberculosis can be vague resulting in diagnostic dilemma.Objective: To report a case of abdominal tuberculosis diagnosed by FNAC of a mesenteric lymphnode.Case: A 17-year-old boy presented in General out Patient department complaining of abdominal pain, abdominal distension, and low grade fever, anorexia and weight loss for 2 months. The examination revealed pallor, low body weight, doughing of abdomen and multiple palpable painless, slightly mobile abdominal lymph nodes. The ultrasonography (USG) guided fine needle aspiration cytology (FNAC)

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Inoue, Hidenari. "SPECTROSCOPIC AND PHYSICOCHEMICAL METHODS FOR STUDYING THE INTERACTION OF METALLOPORPHYRIN WITH DNA." Indonesian Journal of Chemistry 2, no. 3 (June 9, 2010): 131–34. http://dx.doi.org/10.22146/ijc.21907.

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In recent years studies on the interaction of porphyrin with DNA have received much attention because of the importance in DNA-probing and photodynamic therapy of cancer. A variety of spectroscopic methods, e.g. NMR, ESR, Mössbauer, UV-visible absorption, circular dichroism (CD), magnetic circular dichroism (MCD), IR and Raman spectroscopy, have been employed for studying interactions between porphyrin and DNA. Of these spectroscopic methods, only a few instrumental analytical techniques applicable to an aqueous buffer solution of DNA have been particularly developed to investigate porphyrin-D

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Titorova, Valentina, Konstantin Sabbatovskiy, Veronika Sarapulova, Evgeniy Kirichenko, Vladimir Sobolev, and Ksenia Kirichenko. "Characterization of MK-40 Membrane Modified by Layers of Cation Exchange and Anion Exchange Polyelectrolytes." Membranes 10, no. 2 (January 27, 2020): 20. http://dx.doi.org/10.3390/membranes10020020.

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Coating of ion exchange membranes used in electrodialysis with layers of polyelectrolytes is a proven approach that allows for the increasing of the limiting current, the suppressing of sedimentation, the controlling of the intensity of generation of H+ and OH− ions, and also the improving of monovalent selectivity. However, in the case when two materials with the opposite sign of the charge of fixed groups come in contact, a bipolar boundary is created that can cause undesirable changes in the membrane properties. In this work, we used a MK-40 heterogeneous membrane on the surface of which a

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Su, L., and O. B. Toon. "Saharan and asian dust: similarities and differences determined by CALIPSO, AERONET and a coupled climate-aerosol microphysical model." Atmospheric Chemistry and Physics Discussions 10, no. 12 (December 2, 2010): 29513–67. http://dx.doi.org/10.5194/acpd-10-29513-2010.

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Abstract. This study compares the properties of atmospheric dust from the Saharan deserts and the Asian deserts using data from CALIPSO and AERONET during 2006 and 2007 along with simulations using a coupled climate-microphysical sectional model. Saharan deserts are largely south of 30° N, while Asian ones are primarily north of 30° N, hence they experience different meteorological regimes. Saharan dust lifting occurs all year long, primarily due to subtropical weather systems. However, Asian dust is lifted mostly in spring when mid-latitude frontal systems lead to high winds. Rainfall is more

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Su, L., and O. B. Toon. "Saharan and Asian dust: similarities and differences determined by CALIPSO, AERONET, and a coupled climate-aerosol microphysical model." Atmospheric Chemistry and Physics 11, no. 7 (April 5, 2011): 3263–80. http://dx.doi.org/10.5194/acp-11-3263-2011.

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Abstract. This study compares the properties of atmospheric dust from the Saharan deserts and the Asian deserts using data from CALIPSO and AERONET during 2006 and 2007 along with simulations using a coupled climate-microphysical sectional model. Saharan deserts are largely south of 30° N, while Asian ones are primarily north of 30° N, hence they experience different meteorological regimes. Saharan dust lifting occurs all year long, primarily due to subtropical weather systems. However, Asian dust is lifted mostly in spring when mid-latitude frontal systems lead to high winds. Rainfall is more

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WILSON, BRONWEN. "Venice, print, and the early modern icon." Urban History 33, no. 1 (May 2006): 39–64. http://dx.doi.org/10.1017/s0963926806003518.

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Venetian printmakers in the sixteenth century were enthusiastic participants in what became a project of civic self-promotion as they looked beyond the local market to an international one. In response to the fascination of foreigners who marvelled at the city's singular topography and its reputation for liberty and licentiousness, the bird's-eye view and images of local social types – such as the doge and courtesan – became transmuted into icons of the city's urban identity. The medium and modes of representation used to reproduce the republic's social and physical organization on paper are c

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Berger, G. W., J. J. Clague, and D. J. Huntley. "Thermoluminescence dating applied to glaciolacustrine sediments from central British Columbia." Canadian Journal of Earth Sciences 24, no. 3 (March 1, 1987): 425–34. http://dx.doi.org/10.1139/e87-044.

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Glaciolacustrine and lacustrine sediments are important indicators of deglacial, interglacial, and nonglacial intervals within the Quaternary of Canada, yet there are no techniques for measuring their absolute deposition ages beyond the last ~ 50 000 years. In an attempt to develop an absolute dating tool for such sediments, we applied the partial bleach thermoluminescence (TL) dating technique to glaciolacustrine sediments of known age from central British Columbia. Samples were selected to represent both ice-proximal and ice-distal deposition and different modes of sedimentation.The results

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Tempel, Karlheinz, Hannelore Kortenbeutel, and Christina von Zallinger. "Bleomycin - Induced DNA Damage and DNA Repair in Chicken Embryo Cells as Compared to X-Irradiation." Zeitschrift für Naturforschung C 54, no. 12 (December 1, 1999): 1068–74. http://dx.doi.org/10.1515/znc-1999-1211.

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Following in vitro- and in ovo-exposure of chicken embryo cells, the level of bleomycin (BM) - induced damage was evaluated by using DNA synthesis, nucleoid sedimentation (SED), and viscometry of alkaline cell lysates (VISC). This damage was compared to Xirradiation, using 5.9-378 nM BM in vitro, 1.5-116 μg BM/egg in ovo, and 2-32 Gy, respectively, in vitro as well as in ovo. With respect to BM. the most notable result is the increase in DNA synthesis and VISC at the lowest concentrations of the drug. A decrease in both parameters was observed at high BM concentrations and following exposure t

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Guensburg, Thomas E., and James Sprinkle. "Environmental controls of rapidly diversifying echinoderms during the Early Paleozoic." Paleontological Society Special Publications 6 (1992): 114. http://dx.doi.org/10.1017/s2475262200006742.

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Echinoderms were among the earliest phyla to exploit global environmental shifts leading to the rise of the Paleozoic Evolutionary Fauna during the Ordovician. Echinoderms including crinoids and rhombiferans diversified more rapidly and actually precede other groups such as bryozoans, corals, and many articulate brachiopods in the record. We argue that preadaptive morphologic strategies among the echinoderms coupled with newly available and widespread living space led to this success.Sessile attached echinoderms, especially crinoids and some blastozoans, dominate echinoderm faunas generally th

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Dong, Yingdi, Hongliang Li, Yuping Fan, Xiaomin Ma, Dong Sun, Yanhong Wang, Zhiyong Gao, and Xianshu Dong. "Tunable Dewatering Behavior of Montmorillonite Suspension by Adjusting Solution pH and Electrolyte Concentration." Minerals 10, no. 4 (March 25, 2020): 293. http://dx.doi.org/10.3390/min10040293.

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Montmorillonite is always a troublemaker for the dewatering in coal processing since its existence can decrease the rates of sedimentation and filtration of coal slurry. To eliminate the adverse effect of montmorillonite, adjusting the slurry pH and adding electrolytes are always the key methods. However, the underlying mechanism still needs to be further studied. The dewatering of Na-montmorillonite (Na-Mt) suspensions has been studied as a function of NaCl concentration (10−3, 10−2, and 10−1 M) at different pH values (6.0, 7.7, 8.1, 9.2). The point of zero charge of edge surface of Na-Mt (pH

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Kacan, Kevin G., and Zachary J. Lebo. "Microphysical and Dynamical Effects of Mixed-Phase Hydrometeors in Convective Storms Using a Bin Microphysics Model: Melting." Monthly Weather Review 147, no. 12 (November 12, 2019): 4437–60. http://dx.doi.org/10.1175/mwr-d-18-0032.1.

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Abstract The dynamics of convective systems are inherently linked to microphysical processes through phase changes that result in warming or cooling. This is especially true of near-surface cooling via evaporation and melting of falling hydrometeors. In most numerical simulations, the melting of frozen hydrometeors (e.g., hail, graupel, snow) is computed within parameterized bulk microphysics schemes, many of which lack the ability to accurately represent mixed-phase hydrometeors (i.e., partially melted ice), which can affect hydrometeor sedimentation, melting, and evaporation of shed drops. T

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Yang, C. B., Y. L. Cheng, J. C. Liu, and D. J. Lee. "Treatment and reuse of backwash water in Taipei water treatment plant, Taiwan." Water Supply 6, no. 6 (December 1, 2006): 89–98. http://dx.doi.org/10.2166/ws.2006.961.

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A case study on the treatment and reuse of backwash water from Chang-Hsing Water Treatment Plant (CHWTP) and Swan-Sea Water Treatment Plant (SSWTP) of Taipei Water Department was conducted. Both backwash waters showed different properties. However, the characteristics of each backwash water did not vary considerably among samples taken during different time. Results from jar tests indicated that both polyaluminium chloride (PACl) and alum could result in effective removal of turbidity. Both DOC and absorbance of UV254 decreased slightly with increasing coagulant dosage. In continuous operation

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Mahler, Bryon P., Paul J. Bujalowski, Huzhang Mao, Erik A. Dill, Paul J. Jardine, Kyung H. Choi, and Marc C. Morais. "NMR structure of a vestigial nuclease provides insight into the evolution of functional transitions in viral dsDNA packaging motors." Nucleic Acids Research 48, no. 20 (October 21, 2020): 11737–49. http://dx.doi.org/10.1093/nar/gkaa874.

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Abstract Double-stranded DNA viruses use ATP-powered molecular motors to package their genomic DNA. To ensure efficient genome encapsidation, these motors regulate functional transitions between initiation, translocation, and termination modes. Here, we report structural and biophysical analyses of the C-terminal domain of the bacteriophage phi29 ATPase (CTD) that suggest a structural basis for these functional transitions. Sedimentation experiments show that the inter-domain linker in the full-length protein promotes oligomerization and thus may play a role in assembly of the functional motor

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Jeong, J. O., C. W. Kwon, and Y. K. Sohn. "Lithofacies and architecture of a basinwide tuff unit in the Miocene Eoil Basin, SE Korea: Modes of pyroclastic sedimentation, changes in eruption style, and implications for basin configuration." Geological Society of America Bulletin 120, no. 9-10 (September 1, 2008): 1263–79. http://dx.doi.org/10.1130/b26077.1.

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Baimanov, Kenesbay, Kadirbek Nazarbekov, Ruslan Baimanov, and Sharap Tazhibayev. "Hydraulic calculation of irrigation settling tanks of Amu Darya irrigation systems." E3S Web of Conferences 264 (2021): 03027. http://dx.doi.org/10.1051/e3sconf/202126403027.

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The Amu Darya river carries a large amount of up to 15 kg/m3 of suspended matter containing up to 85-90% suspended and 10-15% bottom sediments, which pose a serious threat to the hydroelectric power station and irrigation systems operating in its basin. In case of dam water intake, head sump tanks are provided in the composition of waterworks. So, in the composition of Right-Bank and Left-Bank, sedimentation tanks with mechanical cleaning to protect the channels were built at the Takhiatash hydroelectric complex Kaskelenskaya and Selinsky irrigation system. It is established that the hydraulic

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Cati, Alice. "The vulnerable gaze of the migrant." Alphaville: Journal of Film and Screen Media, no. 18 (December 1, 2019): 54–69. http://dx.doi.org/10.33178/alpha.18.05.

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In the current media system, we are observing the increasing sedimentation of symbolic forms, discourses and imagery regarding contemporary migrations. With the reuse of videos filmed by migrants, the documentary form represents the best “yielding field” where intercultural modes of representation and visual self-inscriptions can be constantly reinvented. In particular, videos made with nonprofessional devices have drawn viewers’ attention to the capacity of moving images to bear witness to reality “from below” and, in some respects, to reproduce aesthetically the opacity and the contingency o

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