Relevant bibliographies by topics / Rotary dispersant

Academic literature on the topic 'Rotary dispersant'

Author: Grafiati
Published: 30 May 2022
Last updated: 31 May 2022

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Journal articles on the topic "Rotary dispersant"

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Chen, Xiaoyan, Weizhi Huang, Bobing He, and Yafeng Zhang. "Synthesis and Application of Tackifying Dispersant Poly (Vinyl Alcohol-Acrylic Acid-Triallyl Cyanate)." Polymers 14, no. 3 (January 29, 2022): 557. http://dx.doi.org/10.3390/polym14030557.

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At present, the thickener market is relatively advanced. Only by imparting thickeners with new properties can they meet the needs of the current market. In this work, a new modified tackifying dispersant poly (vinyl alcohol-acrylic acid-triallyl cyanate) (PVA-AA-t) was prepared via alcoholysis of a random copolymer composed of vinyl acetate (VAc), acrylic acid (AA), and triallyl cyanate (TAC) by a one-step high-temperature solution polymerization in methanol, which was a relatively simple method. The structure of the polymer was characterized by FTIR and TG. FTIR proved the successful synthesis of PVA-AA-t, while TG showed the thermal stability of PVA-AA-t at around 100 °C. The excellent thickening properties of the PVA-AA-t were observed using a nano particle size analyzer and a rotary viscometer. The nano particle size analyzer showed that the PVA-AA-t particles swelled in water to nearly nine times their initial size. The rotary viscometer showed that the viscosity of PVA-AA-t in water increased significantly, while PVA-AA-t was sensitive to electrolytes and pH, which changed the polymer molecular chain from stretched to curled, resulting in a decrease in viscosity. In addition, the dispersion properties of PVA-AA-t and a common thickener as graphene (Gr) dispersants were compared. The results indicate that PVA-AA-t has very good compatibility with Gr, and can effectively disperse Gr, because of the introduction of weak polar molecules (VAc) to the polymer molecules, changing their polarity, meaning that it is possible to use PVA-AA-t in the dispersion of Gr and other industrial applications (such as conductive textile materials, Gr batteries, etc.) derived from it.
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Coelho, Alexander, Luke Schenck, Gulenay Guner, Ashish Punia, and Ecevit Bilgili. "A Combined Isolation and Formulation Approach to Convert Nanomilled Suspensions into High Drug-Loaded Composite Particles That Readily Reconstitute." Powders 1, no. 2 (May 3, 2022): 88–109. http://dx.doi.org/10.3390/powders1020008.

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The advantage of nanoparticles to improve bioavailability of poorly soluble drugs is well known. However, the higher-energy state of nanoparticles beneficial for bioavailability presents challenges for both the stability of nanosuspensions and preventing irreversible aggregation if isolated as dry solids. The aim of this study is to explore the feasibility of an evaporation isolation route for converting wet media milled nanosuspensions into high drug-loaded nanocomposites that exhibit fast redispersion in aqueous media, ideally fully restoring the particle size distribution of the starting suspension. Optimization of this approach is presented, starting from nanomilling conditions and formulation composition to achieve physical stability post milling, followed by novel evaporative drying conditions coupled with various dispersant types/loadings. Ultimately, isolated nanocomposite particles reaching 55–75% drug load were achieved, which delivered fast redispersion and immediate release of nanoparticles when the rotary evaporator drying approach was coupled with higher concentration of hydrophilic polymers/excipients. This bench-scale rotary evaporation approach serves to identify optimal nanoparticle compositions and has a line of sight to larger scale evaporative isolation processes for preparation of solid nanocomposites particles.
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Clark, James, Ken Becker, and Richard Lessard. "MAINTAINING DISPERSANT STOCKPILES AND ASSESSING THEIR QUALITY." International Oil Spill Conference Proceedings 2008, no. 1 (May 1, 2008): 695–98. http://dx.doi.org/10.7901/2169-3358-2008-1-695.

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ABSTRACT Ensuring the capability to mount a rapid and effective dispersant response when needed for an oil spill includes a proactive approach to manage dispersant stockpiles in such a way as to ensure that the quality of the product has not deteriorated over time. This includes 1) storage strategies that minimize potential adverse impacts of environmental elements (heat, cold, and humidity) on the chemical products and on their containers, 2) considerations to check the integrity of storage containers on a regular basis to ensure there is no loss of volatiles or introduction of water vapors (or endeavor to keep these processes to absolute minimums); 3) development and execution of a plan to rotate stock and use up older batches of product during response operations before mobilizing newer product; and 4) design and execution of a rational plan to sample the stored products on a logical and systematic schedule and have them analyzed for chemical quality and effectiveness. This paper provides guidance on approaches to address these 4 areas using information from dispersant manufacturers, response organizations that manage dispersant stockpiles, and results of testing for chemical quality and effectiveness completed for dispersant samples taken from various U.S. stockpiles of Corexit 9527. These data demonstrate that where recommended practices have been followed to ensure quality storage of the dispersants, batches of Corexit that have been held for over 30 years can remain acceptable for spill response contingencies. The recommended stockpile storage and management practices will also be effective in prolonging the useful life of other dispersant products; however their effective shelf life must be determined individually due to differences in the chemical composition of various product lines.
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Li, Zhi Miao, Ju Bao Liu, Min Luo, and Qiang Zhang. "Dynamic Finite Element Analysis and Experimental Study of Rotating Column in Cylinder." Applied Mechanics and Materials 229-231 (November 2012): 453–56. http://dx.doi.org/10.4028/www.scientific.net/amm.229-231.453.

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Rotary slender column in cylinder is a special structure in oil engineering. It contacts with outer cylinder and interacts with its inner pipe fluid and outer annular fluid. A partitioned coupling model was founded by dispersing slender column into beam element, dividing fluid domain into some sections, dispersing fluid section into hexahedron unit and transfer method of the information of coupling interface was described. Dynamics experimental device of column-liquid interaction was built to do column rotating test with considering the displacement and force boundary conditions of rotating column and testing axial excitation force of bottom column, axial acceleration of head column, transverse displacement of columns and collision and contact forces between inner columns and outer pipeline. The maximum absolute error between experimental results and numerical results is 0.31mm and this research provides the methods of numerical simulation and experimental study.
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Zhang, Yong Di, Bin Zhang, Yan Fang Yue, and Guang Yang. "Manufacturing Process of EP Matrix Composite Rapid Injection Mold and Application Case." Advanced Materials Research 1061-1062 (December 2014): 460–64. http://dx.doi.org/10.4028/www.scientific.net/amr.1061-1062.460.

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The prototype can be produced from RP(Rapid Prototyping) technology directly by 3D data model, by dispersing and accumulating layer by layer principle, so the new product development cycle can be shortened greatly. RT (Rapid Tooling) technology is a new method and technology for rapid manufacturing mold, which is developed from RP technology. In this research, a rotary switch prototype was produced by laser stereolithography (SL) technology. Using the prototype as master pattern , a injection mold was made by metal casting method , using the composite composed of epoxy resin E51, aluminum powder, quartz powder , graphite and others, the manufacturing process was described in detail, and the ABS samples were successfully obtained through trial production in the injection molding machine.
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Zhang, Honghui, Zhiyuan Zou, Seung-Bok Choi, and Xu Yang. "Active dispersing mechanism for settled magnetorheological fluid featuring with rotary blades and inductive coils in twin-tube damper." Smart Materials and Structures 30, no. 6 (April 27, 2021): 067001. http://dx.doi.org/10.1088/1361-665x/abf754.

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Wilson, AGL, LA Harper, and H. Baker. "Evaluation of insecticide residues and droplet drift following aerial application to cotton in New South Wales." Australian Journal of Experimental Agriculture 26, no. 2 (1986): 237. http://dx.doi.org/10.1071/ea9860237.

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In a study to determine the extent of off target drift from aerial spraying, insecticides were applied to cotton crops in various strengths of crosswind by an aircraft fitted with rotary atomizers. Both water-based and oil-based sprays were applied, at 20 and 2 litres/ha respectively. Compared with the mean insecticide deposit across a 16-m target swath, in seven runs, the mean recoveries of insecticide 15, 165 and 3 15 m downwind from the edge of the swath were 6.8, 0.13 and 0.002% respectively. Deposition on plants was nearly twice that on the ground, but the proportional decline downwind was similar. Counts of droplets deposited on paper targets fixed to masts showed that the dispersing cloud of water-based spray contracted more rapidly than did that of the oil-based spray, probably because of greater evaporation of the former. The results indicate that a 300-m wide buffer zone between target crops and areas susceptible to contamination should be adequate under most conditions.
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Teske, Milton E., Daniel A. Wachspress, and Harold W. Thistle. "Prediction of Aerial Spray Release from UAVs." Transactions of the ASABE 61, no. 3 (2018): 909–18. http://dx.doi.org/10.13031/trans.12701.

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Abstract. This article summarizes the ability of CHARM+AGDISP to predict the drift and deposition of sprays released from rotary wing unmanned aerial vehicles (UAVs). This predictive capability results from merging algorithms for spray transport, as found in AGDISP (AGricultural DISPersal), with CHARM (Comprehensive Hierarchical Aeromechanics Rotorcraft Model). The resulting software tracks the release of spray droplets from nozzles on the UAV to deposition on the ground. To date, both AGDISP and CHARM, a code that provides a complete representation of the time-varying, unsteady flow field surrounding a helicopter during transient maneuvering flight near the ground, have been extensively validated. The CHARM+AGDISP software is applied to two UAVs to explore the flow field regimes that present challenges for effective UAV operations. The simulations undertaken indicate flight conditions that yield acceptable deposition levels and minimize drift; inversely, conditions are also identified that result in off-target drift that may be problematic. Keywords: Aerial application, AGDISP, CHARM, Helicopter modeling, Unmanned aerial vehicle (UAV).
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Lampert, E. P. "Control of Green Peach Aphids with Side-Dress Applications of Temik, 1984." Insecticide and Acaricide Tests 10, no. 1 (January 1, 1985): 256. http://dx.doi.org/10.1093/iat/10.1.256.

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Abstract On 4 May tobacco was transplanted into plots 30 ft (17 plants) x 15 ft (4 rows–42 inches on center) in a field of Norfolk and Appling loamy sand soil at the Central Crops Research Station, Clayton, NC. Plots were arranged in a randomized complete-block design with 3 reps. On 7 Jun treatments were applied with a Noble granular applicator mounted on a John Deere Hi-Cycle 600. The granule dispersing fan on each hopper was replaced with a 2 inch dia hose which extended to the soil surface. This resulted in a narrow band adjacent to the plant. Within 1 h after application, all treatments were incorporated with a rotary tiller and ridged. Once a week, the topmost 6-inch leaf on 5 consecutive plants in both center rows were examined; all green peach aphids were counted and recorded. All plants in both center rows were also counted and examined for aphid colonies. Prior to analysis of variance, the proportion of aphid colonized plants were subjected to the arcsin-square root transformation.
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Winters, Harvey, Hong Gay Eu, Sheng Li, Alla Alpatova, Abdullah H. Alshahri, Nasreen Nasar, and Noreddine Ghaffour. "Biofouling of seawater reverse osmosis membranes caused by dispersal of planktonic particulate bacterial aggregates (protobiofilms) from rotary energy recovery devices." Desalination 529 (May 2022): 115647. http://dx.doi.org/10.1016/j.desal.2022.115647.

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Dissertations / Theses on the topic "Rotary dispersant"

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Любека, Андрій Миколайович. "Гранулювання багатокомпонентних рідких систем в псевдозрідженому шарі." Thesis, КПІ ім. Ігоря Сікорського, 2021. https://ela.kpi.ua/handle/123456789/39467.

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Дисертаційна робота спрямована на вирішення важливої науково-технічної задачі – підвищення ефективності процесу одержання інноваційних гранульованих органо-мінеральних добрив необхідних для впровадження принципів раціонального землекористування.
The dissertation is aimed at solving an important scientific and technical problem - increasing the efficiency of the process of obtaining innovative granular organo-mineral fertilizers necessary for the implementation of the principles of rational land use. The dissertation is devoted to increase efficiency of process granulation in a fluidized bed of multicomponent heterogeneous liquid systems containing in equal quantities nutrients of an organic and mineral origin from obtaining complex granular humic-organomineral fertilizers with specified properties.
Диссертационная работа направлена на решение важной научно-технической задачи - повышение эффективности процесса получения инновационных гранулированных органо-минеральных удобрений необходимых для внедрения принципов рационального землепользования.
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D'Andrea, Lourdes Aparecida Zampieri [UNESP]. "Leishmaniose visceral na região de Presidente Prudente, São Paulo: distribuição espacial e rotas de dispersão." Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/152425.

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Submitted by LOURDES APARECIDA ZAMPIERI D'ANDREA null (zampieri@muranet.com.br) on 2018-01-08T08:37:28Z No. of bitstreams: 1 Tese -D ANDREA, Lourdes Aparecida Zampieri.pdf: 8216517 bytes, checksum: cc8882ddd2cecf7137d25aa22f866c59 (MD5)
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
A questão central desenvolvida na presente tese é uma abordagem integrada de elementos que envolvem as ações de vigilância e o controle da leishmaniose visceral (LV), relacionando dados e análise do mundo microbiológico ao conjunto de informações espaciais existentes sobre o tema. Teve como principal objetivo, avaliar a distribuição espacial dos casos humanos com LV notificados e relacioná-los com a infecção na população canina nos municípios pertencentes à Rede Regional de Atenção à Saúde – RRAS 11 de Presidente Prudente – SP e as rotas de dispersão do agente patógeno. Para isto, foram utilizados conhecimentos geoepidemiológicos e de ferramentas de geoprocessamento e análise espacial para analisar as rotas de disseminação dos agentes e da infecção da doença na população canina na área urbana e rural. O estudo foi desenvolvido nos 45 municípios da macrorregião de Presidente Prudente – SP, com base populacional, no delineamento transversal e na coleta de dados in locu. Para entender o contexto da área foi realizado: levantamento de dados secundários, que constitui a criação de bases cartográficas que tenham sido elencadas como explicativas do fenômeno estudado (LV), com base na bibliografia sobre o tema; identificação das espécies de Leishmania circulantes na população canina, discutindo-se fatores de risco individuais para soropositividade de Leishmania em cães em áreas urbanas e rurais, bem como avaliando a prevalência de LV canina em assentamentos rurais da Região de Saúde de Presidente Prudente – SP. Também foi estratificado áreas para LV humana e canina, segundo o risco epidemiológico, com base em mapas temáticos, análises espaciais e proposto um modelo preditivo de rotas de dispersão e fluxos de transmissão da LV na população humana e canina. Com base nesses resultados, foi possível identificar na RRAS 11 de Presidente Prudente três diferentes tipos de centros de dispersão da LV: core, eixo e borda e a necessidade de a política pública repensar o Programa de Vigilância e Controle da LV e estabelecer estratégias diferenciadas para cada tipo de centro de dispersão, visando a quebra da cadeia de transmissão da doença e/ou o retardo do processo de dispersão em território Paulista.
The central issue developed in this thesis is an integrated approach of elements that involve actions of surveillance and controlling of the visceral leishmaniasis (VL), relating data and analysis of the microbiological world to the set of spatial information on this subject. The main objective was to evaluate the spatial distribution of human cases with reported VL and to relate them to infection in the canine population in the municipalities belonging to the Regional Network of Health Care - RRAS 11 of Presidente Prudente - SP and the pathogen's routes of dispersion. Geoepidemiological knowledge, geoprocessing tools and spatial analysis were used to analyze the agents' routes of dissemination and the disease's infection in the canine population in urban and rural areas. The study was carried out in the 45 municipalities of macroregion of Presidente Prudente - SP, with population base, in the cross - sectional design and in locu data collection. To understand the context of the area, were carried out: secondary data collection, for the creation of cartographic bases that have been listed as explanatory of the phenomenon studied (VL), based on the bibliography on the subject; identification of the circulating Leishmania species in the canine population, discussing individual risk factors for Leishmania seropositivity in dogs in urban and rural areas, as well as evaluating the prevalence of canine VL in rural settlements of the Health Region of Presidente Prudente – SP. Areas for human and canine VL were also stratified, according to the epidemiological risk, based on thematic maps and spatial analyzes, and a predictive model of dispersion routes and VL transmission flows in the human population and Canine was proposed. Based on these results, in RRAS 11 of Presidente Prudente were identified three different types of VL dispersion centers: core, axis and border, and the need for public policy to rethink the VL Surveillance and Control Program and to establish differentiated strategies for each type of dispersion center, aiming at breaking the chain of transmission of the disease and / or delaying the dispersal process in the Sao Paulo state area.
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Book chapters on the topic "Rotary dispersant"

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Mohammad, Shuhairie, Mohd Falfazli Mat Jusof, Nurul Amira Mhd Rizal, Ahmad Azwan Abd Razak, Ahmad Nor Kasruddin Nasir, Raja Mohd Taufika Raja Ismail, and Mohd Ashraf Ahmad. "Elimination-Dispersal Sine Cosine Algorithm for a Dynamic Modelling of a Twin Rotor System." In Lecture Notes in Electrical Engineering, 167–78. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-2317-5_15.

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Yang, Shengqiang, Qixiang Yu, Baohai Yu, Feng Wang, Lei Wang, and Qinfang Wang. "The theoretical study of rotary jet dispersing the accumulating gas." In Mining Science and Technology, 221–26. CRC Press, 2004. http://dx.doi.org/10.1201/9780203022528-44.

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Wang, Feng, Lei Wang, Qinfang Wang, Qixiang Yu, Baohai Yu, and Shengqiang Yang. "The theoretical study of rotary jet dispersing the accumulating gas." In Mining Science and Technology, 221–25. Taylor & Francis, 2004. http://dx.doi.org/10.1201/9780203022528.ch44.

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Sniezhkin, Yurii, Raisa Shapar, and Olena Husarova. "GRINDING AND FRACTIONATION OF DRIED PLANT MATERIALS." In Priority areas for development of scientific research: domestic and foreign experience. Publishing House “Baltija Publishing”, 2021. http://dx.doi.org/10.30525/978-9934-26-049-0-35.

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In the absence of large-scale pectin production in Ukraine, pectin-containing powders are an alternative source. They are used as natural additives in the manufacture of health products, due primarily to the presence of pectin, as well as other useful natural components of raw materials. The purpose of the work is to conduct research on the dispersion and fractionation of dried plant materials and to determine the energy-saving regimes of these processes. The task of the research is to develop optimal modes of dispersion of dried plant materials; determine the depend-ence of the micromill performance and power consumption on the rotation speed of the dispersant rotor; to establish the influence of the load on the sieve and the scattering time on the fractionation process. Objects, equipment and research methods. Dried pectin-containing apples and table beets were used as research objects. Studies of the dispersion process were performed on an micromill (8-MM), the coarse part was ground on a disintegrator (ДЕЗІ), the study of the dispersed composition of powders was carried out on the device 029. The paper analyzes the existing methods of grinding and equipment for its implementation. The analysis showed that percussion mills are the most suitable for grinding dried pectin-containing apples and table beets. The dispersed composition of pectin-containing powders is determined in the article. The influence of material loading on the sieve and scattering time on the yield of the fine fraction was investigated. It is proved that the scattering process is more influenced by the scattering time. The paper graphically shows the effect of rotor speed on the equivalent particle diameter and powder dispersion; differential and integral particle distribution curves depending on rotor speed and scattering time for apple and beet powders; the dependence of micromill productivity and power consumption on the speed of the disperser rotor, etc. The optimal operating speed of the rotor is 50 m/s. At this speed, energy consumption for grinding dried materials is minimal. It is proved that the fractionation process almost does not depend on the load on the sieve, but depends on the scattering time. It is impractical to increase the process duration over 3 minutes. Increasing the time to 4 minutes increases the mass of the fine fraction by only 2…5%. The yield of the fine fraction of powders according to the optimal modes of dispersion and separation is: apple – 65...68%, beet – 62...65%. The possibility of re-grinding in order to increase the fine fraction yield is shown. Conclusions. According to the results of the research, the optimal dispersion regimes, the dependence of micromill productivity and power consumption on the dispersant rotor speed, as well as the effect of load on the sieve and scattering time of apple and beet powders on the fractionation process are determined. On the basis of the conducted researches energy-saving conditions of processes of dispersion and fractionation of pectin-containing powders and proper work of the corresponding equipment are defined.
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"Fig. 4 Principle of operation of rotor/stator homogenizer. late matter and can have compatibility problems with the product. [These sealing aids are now being made of polytetrafluoroethylene (PTFE), which improves the situation in most cases.] For manufacture of sterile products, the dispersing elements need to be sterilized, preferably by using steam. Experiments have shown that these elements are steam sterilizable in 15-30 min at 121 °C. These dispersers are available as in-line models or vertically mounted "probe"-style units (see Fig. 5). A colloid mill has several similarities with the rotor-stator type mixer. It has a stationary "stator" through the center of which the product is pumped at high pressure. The rotor moves close to the stator. The gap is often adjustable and is of the order of 0.1 mm. The adjustable feature of the gap often makes reproducibility of batches a challenge, as the screw type of adjusting mechanism for the rotor often is not repro-ducible to a high degree of accuracy. In a reciprocating design homogenizer, a piston moves in a cylinder and pushes the product through a nozzle whose opening is adjustable by means of a spring loaded Fig. 5 Dispersing element of an in-line unit. (Photo courtesy of Ika-Werke, Germany.)." In Pharmaceutical Dosage Forms, 426–28. CRC Press, 1998. http://dx.doi.org/10.1201/9781420000955-66.

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"without producing any appreciable velocity differences, so that almost no mixing oc-curs. By installing a stationary baffle, some mixing capability is added. This works well on materials with viscosities from 5000-25,000 centipoise. For the best results, with products between 100,000 and 250,000 centipoise, a counterrotating set of crossbars provides excellent blending. Such equipment is illustrated in Fig. 15. Some designs use the same motor, turning a pinion gear between two opposing bevel gears to provide rotation in opposite directions. Others provide a greater degree of flexibility by driving the two shafts on separate motors. In either case, there will be a hollow shaft driving the anchor agitator and an additional shaft located inside the hollow shaft to drive the inner crossbars [21]. B. High-Speed Dispersers A simple yet powerful device used extensively in industries other than pharmaceutical manufacturing for dispersion of solid particles in liquids is the high-speed disperser. Sometimes called a saw-blade disperser for the shape of the mixing impeller, this ma-chine consists of a variable-speed shaft connected to an impeller with a serrated edge. The mixer is designed to rotate at a high speed in order to produce shear and pumping (Fig. 16). This type of equipment is designed specifically to disperse powders, usually pig-ments, into liquids. Much has been written that high-speed dispersers are capable only of dispersing "easy" pigments [23]. This is true if the particles are hard agglomerates or individual hard particles with some strength. Furthermore, the high-speed disperser design is ineffective if the viscosity is low. The only shear stress that is delivered to Darticles is due to the hydraulic shear that is a product of the shear rate and the viscos-Fig. 15 Counterrotating agitator. (From Ref. 21.)." In Pharmaceutical Dosage Forms, 341. CRC Press, 1998. http://dx.doi.org/10.1201/9781420000955-42.

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Conference papers on the topic "Rotary dispersant"

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Megson, Steven D., Michael Wilson, and Stuart A. MacGregor. "Multiphase Flow Investigation of a Centrifugal Filter Using Computational Fluid Dynamics and Experiments." In ASME 2002 Pressure Vessels and Piping Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/pvp2002-1570.

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Modern “high tech” lubricant oils have been developed to contain a high level of dispersant additive to the base oil. As contaminant loading has increased, designers are required to address the problem of controlling the contamination found in the oil. One method is the use of bypass centrifugal sedimentation. This paper describes a computational study of the basic flow characteristics in a centrifugal sedimenting rotor using the computational fluid dynamics (CFD) package STAR-CD. Simplified CFD models have indicated regions of flow which would be difficult to demonstrate by experimental methods alone. For example, backflow from the outlet channel is found to cause a disruptive secondary flow in some models, but this flow is contained by the inclusion of a more realistic geometry. Two–phase flow computations have also been carried out to investigate the behaviour of spherical particulates of different sizes. Flow and geometry factors affecting the centrifuge performance are discussed.
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