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Journal articles on the topic 'Separation'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Ashgriz, N., and J. Y. Poo. "Coalescence and separation in binary collisions of liquid drops." Journal of Fluid Mechanics 221 (December 1990): 183–204. http://dx.doi.org/10.1017/s0022112090003536.

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An extensive experimental investigation of the binary collision dynamics of water drops for size ratios of 1. 0.75, and 0.5, for the Weber-number range of 1 to 100, and for all impact parameters is reported. Two different types of separating collisions, namely reflexive and stretching separations, are identified. Reflexive separation is found to occur for near head-on collisions, while stretching separation occurs for large-impact-parameter collisions. The boundaries between both of the separating collisions and coalescence collision are found experimentally. Theoretical models for predictions

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2

Liu, Si Si, Chao Hui Zhang, and Han Bing Zhang. "Meniscus and Viscous Forces during the Nanoscale Separation of Sphere-on-Sphere Contact Surfaces." Advanced Materials Research 199-200 (February 2011): 739–44. http://dx.doi.org/10.4028/www.scientific.net/amr.199-200.739.

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When two surfaces are brought into contact or at small separations, the liquid between them forms meniscus, which contributes to adhesion and friction. The increased adhesive force and friction are always the substantial cause leading to micro/nanodevices’s failure. In this study, a dynamic contact model of sphere-on-sphere surfaces during nanoscale separation is presented. A numerical analysis of meniscus and viscous forces based on the dynamic contact model has been carried out. During the separation process, the effects of separation distance, initial meniscus height, surface wettability an

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3

Fisher, Talia. "Separation of Law and State." University of Michigan Journal of Law Reform, no. 43.2 (2010): 435. http://dx.doi.org/10.36646/mjlr.43.2.separation.

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In the framework of the jurisprudential literature, the law-state bond is assumed as a given. Points of dispute emerge only at more advanced stages of the discussion, with respect to such questions as the duty to obey state law or the appropriate extent of state intervention in social relations. This Article will be devoted to a reconsideration of the presupposition of the law-state link and to challenging the state's status vis-à-vis the law-both in its role as the producer of legal norms and its capacity as the arbiter of disputes. The Article opens with a comparative elucidation of the Hobb

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Herrera, Juan José. "Separatio. Estudios recientes sobre la separación metafísica en Tomás de Aquino." Espíritu 72, no. 165 (2023): 97–138. https://doi.org/10.63534/2938-3994.165.2023.97-138.herrera.

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Since its rediscovery in the first half of the 20th century, the ‘separatio’ as an intellectual operation typical of metaphysics in the thought of Thomas Aquinas has been the subject of very different interpretations. In fact, it is probably one of the most debated issues in the field of contemporary Thomism. Our work, which provides elements for an update of the status quaestionis, identifies three directions that the investigations on the Thomistic separatio have followed in recent years. We try to make known the main characteristics of these studies and leave some challenges for future anal

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Nasir Ahamed, Nuzhet Nihaar, Carlos A. Mendiola-Escobedo, Victor H. Perez-Gonzalez, and Blanca H. Lapizco-Encinas. "Assessing the Discriminatory Capabilities of iEK Devices under DC and DC-Biased AC Stimulation Potentials." Micromachines 14, no. 12 (2023): 2239. http://dx.doi.org/10.3390/mi14122239.

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There is a rising need for rapid and reliable analytical methods for separating microorganisms in clinical and biomedical applications. Microscale-insulator-based electrokinetic (iEK) systems have proven to be robust platforms for assessing a wide variety of microorganisms. Traditionally, iEK systems are usually stimulated with direct-current (DC) potentials. This work presents a comparison between using DC potentials and using DC-biased alternating-current (AC) potentials in iEK systems for the separation of microorganisms. The present study, which includes mathematical modeling and experimen

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Rao, B. N., D. Jeyakumar, K. K. Biswas, S. Swaminathan, and E. Janardhana. "Rigid body separation dynamics for space launch vehicles." Aeronautical Journal 110, no. 1107 (2006): 289–302. http://dx.doi.org/10.1017/s0001924000013166.

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Abstract This paper presents a systematic formulation for the simulation of rigid body dynamics, including the short period dynamics, inherent to stage separation and jettisoning parts of a satellite launcher. This also gives a review of various types of separations involved in a launch vehicle. The problem is sufficiently large and complex; the methodology involves iterations at successively lower levels of abstraction. The best choice to tackle such problems is to use state-of-the-art programming technique known as object oriented programming. The necessary classes have been identified to re

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Rza Behbudov, Shahin Ismayilov, Rza Behbudov, Shahin Ismayilov. "DETERMINATION OF THE INSIDE DIAMETER AND CAPACITY OF A VERTICAL GRAVITY SEPARATOR." PAHTEI-Procedings of Azerbaijan High Technical Educational Institutions 17, no. 06 (2022): 175–79. http://dx.doi.org/10.36962/pahtei17062022-175.

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The article provides a brief analysis of the internal diameter and capacity of a vertical gravity separator. The process of separation should be understood as the process of separating the solid, liquid and vapor phases in a stream. Devices in which liquid and solid phases are separated from gas are called separators. Separators used in gas condensate mines are divided into classes according to their different qualities. Separators are divided into the following types (classes) according to their purpose: a) working separators; b) measuring separators. Separators are cylindrical and spherical

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8

Bhattacharjee, Jyoti, and Subhasis Roy. "Advanced Techniques Using Ionic Liquids for Efficient Separation of Sugar Alcohols." Innovation Discovery 2, no. 1 (2025): 3. https://doi.org/10.53964/id.2025003.

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Recently, increasing interest has been reported in the application of ionic liquids (ILs) in separating alcohols and proteins, an important process for several industrial and pharmaceutical applications. Traditional separation processes are poorly effective, with low selectivity, high energy consumption, and environmental problems. This review presents special properties of ILs concerning tunability and remarkable solvation ability that hold great promise for separation processes. The IL stationary phases modified with certain functional groups can enhance the interaction between IL and target

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9

Marlow, Phillip, and Barbara J. Gillam. "Stereopsis Loses Dominance over Relative Size as Target Separation Increases." Perception 40, no. 12 (2011): 1413–27. http://dx.doi.org/10.1068/p7033.

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Binocular disparity produces less stereoscopic depth if the targets are separated by several degrees. It is thus possible that separation decreases the influence of stereopsis as a relative depth cue. Here, four experiments tested the strength of disparity in determining the direction of relative depth in the face of strongly conflicting relative size for a range of target separations. Under conditions of natural fixation—permitting sequential stereopsis—disparity dominated completely at small separations (0.42°) but gradually gave way to relative size domination at large separations. However,

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10

Nasir Ahamed, Nuzhet Nihaar, Carlos A. Mendiola-Escobedo, Victor H. Perez-Gonzalez, and Blanca H. Lapizco-Encinas. "Development of a DC-Biased AC-Stimulated Microfluidic Device for the Electrokinetic Separation of Bacterial and Yeast Cells." Biosensors 14, no. 5 (2024): 237. http://dx.doi.org/10.3390/bios14050237.

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Electrokinetic (EK) microsystems, which are capable of performing separations without the need for labeling analytes, are a rapidly growing area in microfluidics. The present work demonstrated three distinct binary microbial separations, computationally modeled and experimentally performed, in an insulator-based EK (iEK) system stimulated by DC-biased AC potentials. The separations had an increasing order of difficulty. First, a separation between cells of two distinct domains (Escherichia coli and Saccharomyces cerevisiae) was demonstrated. The second separation was for cells from the same do

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11

Jonoska, Nataša, Masahico Saito, Hwee Kim, and Brad Mostowski. "Symbol Separation in Double Occurrence Words." International Journal of Foundations of Computer Science 31, no. 07 (2020): 915–28. http://dx.doi.org/10.1142/s0129054120500343.

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A double occurrence word (DOW) is a word in which every symbol appears exactly twice. We define the symbol separation of a DOW [Formula: see text] to be the number of letters between the two copies of a symbol, and the separation of [Formula: see text] to be the sum of separations over all symbols in [Formula: see text]. We then analyze relationship among size, reducibility and separation of DOWs. Specifically, we provide tight bounds of separations of DOWs with a given size and characterize the words that attain those bounds. We show that all separation numbers within the bounds can be realiz

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12

Davies, Margaret. "Lesbian Separatism and Legal Positivism." Canadian journal of law and society 13, no. 1 (1998): 1–28. http://dx.doi.org/10.1017/s0829320100005561.

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AbstractLegal positivism and lesbian separatism provide very different, yet comparable, approaches to the issue of separation. Legal positivism practices separation as a tool of dominance, while lesbian separatism is based upon the need for identity formation and resistance to dominance. By elaborating upon the justifications advanced for lesbian separatism, this article critiques the separateness defended by legal positivists, and highlights the effects of power and context upon the significance of separation. Thus separatism as a political objective is not rejected or supported, except insof

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Krag, Ludvig Ahm, René Holst, and Niels Madsen. "The vertical separation of fish in the aft end of a demersal trawl." ICES Journal of Marine Science 66, no. 4 (2009): 772–77. http://dx.doi.org/10.1093/icesjms/fsp034.

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Abstract Krag, L. A., Holst, R., and Madsen, N. 2009. The vertical separation of fish in the aft end of a demersal trawl. – ICES Journal of Marine Science, 66: 772–777. Two multi-compartment separator frames were used to study the vertical separation of some commercially important fish species in the aft end of a trawl, with the aim of separating cod (Gadus morhua) from other species. A non-linear multinomial model with random effects was used to analyse the data and to compare the performance of the two frames. The vertical distribution of cod in the aft end of the trawl was close to uniform,

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14

Dujardin, Wouter, Cédric Van Goethem, Julian A. Steele, Maarten Roeffaers, Ivo F. J. Vankelecom, and Guy Koeckelberghs. "Polyvinylnorbornene Gas Separation Membranes." Polymers 11, no. 4 (2019): 704. http://dx.doi.org/10.3390/polym11040704.

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Polynorbornenes are already used in a wide range of applications. They are also considered materials for polymer gas separation membranes because of their favorable thermal and chemical resistance, rigid backbone and varied chemistry. In this study, the use of 5-vinyl-2-norbornene (VNB), a new monomer in the field of gas separations, is investigated by synthesizing two series of polymers via a vinyl-addition polymerization. The first series investigates the influence of the VNB content on gas separation in a series of homo and copolymers with norbornene. The second series explores the influenc

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OKABE, YUTAKA, TSUKASA MIYAJIMA, TOSHIRO ITO, and TOSHIHIRO KAWAKATSU. "APPLICATION OF MONTE CARLO METHOD TO PHASE SEPARATION DYNAMICS OF COMPLEX SYSTEMS." International Journal of Modern Physics C 10, no. 08 (1999): 1513–20. http://dx.doi.org/10.1142/s0129183199001297.

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We report the application of the Monte Carlo simulation to phase separation dynamics. First, we deal with the phase separation under shear flow. The thermal effect on the phase separation is discussed, and the anisotropic growth exponents in the late stage are estimated. Next, we study the effect of surfactants on the three-component solvents. We obtain the mixture of macrophase separation and microphase separation, and investigate the dynamics of both phase separations.

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16

Holler, Jacqueline. "Agency, Protection, and Punishment: Separating Women’s Experiences of Deposit in Early to Mid-Colonial New Spain, 1530–1680." Genealogy 8, no. 1 (2024): 11. http://dx.doi.org/10.3390/genealogy8010011.

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In the diverse multiethnic setting of colonial New Spain, women faced challenges in separating themselves from marriages they considered unendurable. The Catholic Church, which exercised hegemony over definitions of marriage in the colony, controlled access to permanent, formal separation or “ecclesiastical divorce”, while secular courts offered shorter-term separations generally aimed at reunifying couples. Outside of these options, flight, concealment, and bigamy, or “self-divorce,” offered the only recourse for women seeking to leave an untenable relationship. While it is well known that fe

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Tanjaya, Hengky, Raphael Albert Darius, Debora, et al. "A review of Microfluidic blood separation techniques." E3S Web of Conferences 426 (2023): 01063. http://dx.doi.org/10.1051/e3sconf/202342601063.

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Microfluidic blood separation is a modern biological technology used to separate blood cells from their fluids. Blood cells present in the blood become an important outline of many diseases. To maintain the stability and sterility of blood, a tool with renewable technology and a large capacity is needed. Microfluidic blood separation has important assets, especially changes in the physicochemical properties of blood cells that are used for quick and accurate clinical diagnosis. Dissemination of structural materials and compositions from the separation and sorting of blood uses a technical syst

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Zhang, Chao Zhu, Ahmed Kareem Abdullah, and Ali Abdullabs Abdullah. "Electroencephalogram-Artifact Extraction Enhancement Based on Artificial Intelligence Technique." Journal of Biomimetics, Biomaterials and Biomedical Engineering 27 (May 2016): 77–91. http://dx.doi.org/10.4028/www.scientific.net/jbbbe.27.77.

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Blind source separation (BSS) is an important technique used to recover isolated independent sources signals from mixtures. This paper proposes two blind artificial intelligent separation algorithms based on hybridization between artificial intelligent techniques with classical blind source separation algorithms to enhance the separation process. Speedy genetic algorithm SGA directly guesses the optimal coefficients of the separating matrix based on candidate initial from classical BSS algorithms also the separation criteria based on minimization of mutual information between the separating in

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Verma, Saurabh Kumar, and S. P. Sharma. "Focused resolution of thin conducting layers by various dipole EM systems." GEOPHYSICS 60, no. 2 (1995): 381–89. http://dx.doi.org/10.1190/1.1443774.

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Electromagnetic sounding in the frequency domain can be performed in two ways—either by changing frequency at a location (frequency sounding) or by changing the transmitter‐receiver (T-R) separation using a fixed frequency (geometric sounding). These changes in frequency or separation parameters effect vertical scanning of conductivity distributions below the earth’s surface. In case of thin conducting layers, there could be an optimum range of frequencies or T-R separations that provide maximum resolution of the layer parameters. Thus, for a given buried target layer, it should be possible to

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Sonker, Mukul, Daihyun Kim, Ana Egatz-Gomez, and Alexandra Ros. "Separation Phenomena in Tailored Micro- and Nanofluidic Environments." Annual Review of Analytical Chemistry 12, no. 1 (2019): 475–500. http://dx.doi.org/10.1146/annurev-anchem-061417-125758.

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Separations of bioanalytes require robust, effective, and selective migration phenomena. However, due to the complexity of biological matrices such as body fluids or tissue, these requirements are difficult to achieve. The separations field is thus constantly evolving to develop suitable methods to separate biomarkers and fractionate biospecimens for further interrogation of biomolecular content. Advances in the field of microfabrication allow the tailored generation of micro- and nanofluidic environments. These can be exploited to induce interactions and dynamics of biological species with th

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Herrero, Carlos Fernando P. S., Sergio Britto Garcia, Luis Vicente Garcia, and Helton Luiz Aparecido Defino. "Endplates Changes Related to Age and Vertebral Segment." BioMed Research International 2014 (2014): 1–6. http://dx.doi.org/10.1155/2014/545017.

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Endplate separations are defined as the presence of a space between the hyaline cartilage and the cortical bone of the adjacent vertebral body. This study evaluates endplate separations from the vertebral body and intervertebral discs and verifies if endplate separation is related to age and the spinal level. Groups were formed based on age (20–40 and 41–85 years old) and the vertebral segment (T7-T8 and L4-L5 segments). Histological analysis included assessment of the length of the vertebral endplates, the number and dimensions of the separations, and orientation of the collagen fibers, in th

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Yang, Shaolin, Cheng Zhen, Fangfang Li, et al. "Clay-Coated Meshes with Superhydrophilicity and Underwater Superoleophobicity for Highly Efficient Oil/Water Separation." Materials 16, no. 12 (2023): 4396. http://dx.doi.org/10.3390/ma16124396.

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A novel clay-coated mesh was fabricated via a simple brush-coating method without the use of special equipment, chemical reagents, and complex chemical reactions and operation processes. Possessing superhydrophilicity and underwater superoleophobicity, the clay-coated mesh can be used for efficiently separating various light oil/water mixtures. The clay-coated mesh also exhibits excellent reusability, maintaining a high separation efficiency of 99.4% after 30 repeated separations of the kerosene/water mixture.

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Peng, Fei, Zhi Guang Yang, Li Peng Wang, and Jing Sun. "Research on Separation Reliability and Shock Response of a Non-Fracture Super-Zip Separation Device." Applied Mechanics and Materials 878 (February 2018): 8–12. http://dx.doi.org/10.4028/www.scientific.net/amm.878.8.

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The separation reliability and shock response of a state-of-the-art non-fracture Super-Zip separation device have been analyzed. The simulated results showed that the minimum peak value of the internal pressure for separating of the non-fracture Super-Zip separation device was quarter of the conventional Super-Zip separation device. At the same time, on account of the non-fracture separation mode, the structure near the state-of-the-art non-fracture Super-Zip separation device had lower impact acceleration responses comparing with the conventional Super-Zip separation device.

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Li, Xiaohong, Junping Duan, Jiayun Wang, Zeng Qu, Miaomiao Ji, and BinZhen Zhang. "Continuous particle separation of microfluidic chip with integrated inertial separation and dielectrophoresis separation." AIP Advances 12, no. 3 (2022): 035148. http://dx.doi.org/10.1063/5.0075823.

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Particle separation is essential in many microfluidic systems such as biomedical analysis and chemical reactions. This study aims to report a microfluidic separation device combining dielectrophoresis force and inertial force to separate particles continuously. Most particles were separated by inertial force via passing through the contraction and expansion channel and then deviated into different outlets via interdigital electrodes. Numerical simulations using the software COMSOL Multiphysics 5.4 were performed to investigate the effects of flow rate and electric field distribution on particl

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Okoth Opondo, Sam, and Michael J. Shapiro. "Aesthetic Separation / Separation Aesthetics: The Pandemic and the Event Spaces of Precarity." Geopolítica(s). Revista de estudios sobre espacio y poder 11, Especial (2020): 223–38. http://dx.doi.org/10.5209/geop.69347.

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The consensual and dissensual modes of separation above alert us to how the COVID-19 pandemic has turned the present into a time of intense separation, one of which is between those bodies marked as essential versus non-essential, those that have ‘pre-existing conditions’ and those without, and those located in precarious zones of abandonment, congestion, and containment, and those that, owing to prevailing economic distancing and apartness, can practice a life of social distancing. Not only does this highlight how some lives and livelihoods are deemed essential yet disposable, we also come to

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Zheng, Jun, Guoqing Zhou, Yuliang Zhou, Dongfeng Yuan, and Tielin Zhao. "Bed Separation Characteristics of an LTCC Panel and Subsidence Controlling Grouting: Case Study of Longquan Coal Mine, China." Shock and Vibration 2022 (February 3, 2022): 1–13. http://dx.doi.org/10.1155/2022/3837625.

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The bed separation backfill grouting (BSBG) is commonly used to mitigate the surface subsidence caused by coal mining. The distribution characteristics of bed separation and its dynamic evolving process are crucial for BSBG design. This paper utilizes the continuum-discontinuum element method (CDEM) to study the distribution characteristics of bed separation for a longwall top coal caving (LTCC) panel of Longquan coal mine. Numerical results indicate that in addition to the bed separation below the primary key stratum, several small bed separations may also occurred in the strata between the p

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Balestra, Simone, and Uschi Backes-Gellner. "When a Door Closes, a Window Opens? Long-Term Labor Market Effects of Involuntary Separations." German Economic Review 18, no. 1 (2017): 1–21. http://dx.doi.org/10.1111/geer.12086.

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Abstract This study estimates the earning losses of workers experiencing an involuntary job separation. We employ, for the first time in the earning losses literature, a Poisson pseudo-maximum-likelihood estimator with fixed effects that has several advantages with respect to conventional fixed effects models. The Poisson estimator allows considering the full set of involuntary separations, including those with zero labor market earnings because of unemployment. By including individuals with zero earnings and by using our new method, the loss in the year of separation becomes larger than in pr

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BELOV, MIKHAIL I. "MATHEMATICAL MODEL OF SEPARATING POTATO IMPURITIES AT THE ELEVATOR." Agricultural engineering, no. 6 (2022): 43–46. http://dx.doi.org/10.26897/2687-1149-2022-6-43-46.

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Due to the lack of theoretical studies of modelling potato separation on the rod elevator, the authors conducted research of potato separation completeness on the elevator of potato harvester type KPK-3. The research resulted in designing a mathematical model of separating potato impurities on the potato harvester elevator that can help determine the completeness of separation on the elevator. As a result, the authors derived equations of the distribution of separating fi neness over the elevator apron length; proved equations of connection between the elevator length and separating fi neness.

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Ishmael, Khaldoon, Yao Zheng, and Olga Borić-Lubecke. "Phase Correlation Single Channel Continuous Wave Doppler Radar Recognition of Multiple Sources." Sensors 22, no. 3 (2022): 970. http://dx.doi.org/10.3390/s22030970.

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Continuous-wave Doppler radar (CWDR) can be used to remotely detect physiological parameters, such as respiration and heart signals. However, detecting and separating multiple targets remains a challenging task for CWDR. While complex transceiver architectures and advanced signal processing algorithms have been demonstrated as effective for multiple target separations in some scenarios, the separation of equidistant sources within a single antenna beam remains a challenge. This paper presents an alternative phase tuning approach that exploits the diversity among target distances and physiologi

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Liu, Jingyan, Renpeng Yuan, Junqiang Wang, Yaming Ma, and Zhengguo Shang. "Research on particle separation microfluidic chip based on standing surface acoustic wave." Journal of Physics: Conference Series 2740, no. 1 (2024): 012009. http://dx.doi.org/10.1088/1742-6596/2740/1/012009.

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Abstract Microparticle and cell separation is a key process in the study of cell properties, clinical diagnosis and disease treatment. In this paper, a particle separation method based on the combination of surface acoustic wave and microfluidic technology is proposed, which uses standing surface acoustic wave to achieve the separating of polystyrene microparticles of different sizes twice in a continuous flow. Through numerical simulation of the device model and particle trajectory simulation, the optimum particle separation parameters were determined. The particle separation microfluidic chi

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Jandera, Pavel. "Comprehensive two-dimensional liquid chromatography — practical impacts of theoretical considerations. A review." Open Chemistry 10, no. 3 (2012): 844–75. http://dx.doi.org/10.2478/s11532-012-0036-z.

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AbstractA theory of comprehensive two-dimensional separations by liquid chromatographic techniques is overviewed. It includes heart-cutting and comprehensive two-dimensional separation modes, with attention to basic concepts of two-dimensional separations: resolution, peak capacity, efficiency, orthogonality and selectivity. Particular attention is paid to the effects of sample structure on the retention and advantages of a multi-dimensional HPLC for separation of complex samples according to structural correlations. Optimization of 2D separation systems, including correct selection of columns

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Ye, Yao Kun, Nan Yan, Feng Ding, and Jian Feng Man. "Simulation of an Explosive Separation Device Used in Aerospace Craft." Advanced Materials Research 721 (July 2013): 363–66. http://dx.doi.org/10.4028/www.scientific.net/amr.721.363.

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In order to study the work principle and separation features of an explosive separation device used in aerospace craft, this research establishes a three-dimensional finite element model based on ABAQUS software. Through simulation of separating process, the work principle is made clear, the separation time and maximum separation velocity are respectively 2.4ms and 8.9m/s. Meanwhile, a measurement system is designed for experiment and verifying the simulation results. The tested separation time and maximum separation velocity are respectively 2.8ms and 7.5m/s ,which shows that the proposed fin

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Zhang, Qiang, Jixiong Zhang, Zhongya Wu, and Yang Chen. "Overview of Solid Backfilling Technology Based on Coal-Waste Underground Separation in China." Sustainability 11, no. 7 (2019): 2118. http://dx.doi.org/10.3390/su11072118.

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China is the world’s largest coal producer country. However, large-scale coal mining has led to severe environmental pollution issues such as surface subsidence and gangue piling up. The gangue discharging amount has ranked the first in the world and coal mine enterprises are facing enormous discharging reduction pressure. This paper summarizes the research progress of the solid backfilling mining technology and then illustrates the realistic demands and significance of implementing underground coal-waste separation. It also focuses on the technical principles, systems and key equipment of the

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van Kooy, Laurens, Marieke Mooij, and Peter Rem. "Kinetic Gravity Separation." Physical Separation in Science and Engineering 13, no. 1 (2004): 25–32. http://dx.doi.org/10.1080/00207390410001710717.

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Separations by density, such as the separation of non-ferrous scrap into light and heavy alloys, are often realized by means of heavy media. In principle, kinetic gravity separations in water can be faster and cheaper, because they do not rely on suspensions or salt solutions of which the density must be tightly controlled. Test results of a prototype kinetic gravity separator in combination with suitable size classification techniques show promising results for particle sizes between 2 and 10 mm.

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Ma, Xiaoli, and Defei Liu. "Zeolitic Imidazolate Framework Membranes for Light Olefin/Paraffin Separation." Crystals 9, no. 1 (2018): 14. http://dx.doi.org/10.3390/cryst9010014.

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Propylene/propane and ethylene/ethane separations are performed by energy-intensive distillation processes, and membrane separation may provide substantial energy and capital cost savings. Zeolitic imidazolate frameworks (ZIFs) have emerged as promising membrane materials for olefin/paraffin separation due to their tunable pore size and chemistry property, and excellent chemical and thermal stability. In this review, we summarize the recent advances on ZIF membranes for propylene/propane and ethylene/ethane separations. Membrane fabrication methods such as in situ crystallization, seeded growt

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Bera, Debaditya, Rimpa Chatterjee, and Susanta Banerjee. "Aromatic polyamide nonporous membranes for gas separation application." e-Polymers 21, no. 1 (2021): 108–30. http://dx.doi.org/10.1515/epoly-2021-0016.

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Abstract Polymer membrane-based gas separation is a superior economical and energy-efficient separation technique over other conventional separation methods. Over the years, different classes of polymers are investigated for their membrane-based applications. The need to search for new polymers for membrane-based applications has been a continuous research challenge. Aromatic polyamides (PAs), a type of high-performance materials, are known for their high thermal and mechanical stability and excellent film-forming ability. However, their insolubility and processing difficulty impede their grow

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Abdul Majid, Omar, Margarita Kuznetsova, Christophe Castel, Eric Favre, and Rainier Hreiz. "Impact of Concentration Polarization Phenomena on Gas Separation Processes with High-Performance Zeolite Membranes: Experiments vs. Simulations." Membranes 14, no. 2 (2024): 41. http://dx.doi.org/10.3390/membranes14020041.

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Polarization phenomena play a key role in membrane separation processes but remain largely unexplored for gas separations, where the mass transfer resistance is most often limited to the membrane. This assumption, which is commonly used today for the simulation of membrane gas separations, has to be reconsidered when high-performance materials, showing a very high permeance and/or selectivity, are used. In this study, a series of steady-state separation performances experimentally obtained on CO2/CH4 mixtures with a zeolite membrane are compared to the predictions of a dedicated 1D approach, r

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Jellinek, Michael S., and M. Elyce Kearns. "Separation Anxiety." Pediatrics In Review 16, no. 2 (1995): 57–61. http://dx.doi.org/10.1542/pir.16.2.57.

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Fear in reaction to danger potentially leads to life-saving "fight or flight." Anxiety is intrinsic to fear, and the young infant experiences anxiety during the earliest inevitable separations from caretakers. Over time, a child learns to experience anxiety in anticipation of fear, whether this fear is based on a true impending danger or a separation (eg, being left to fall asleep at bedtime). Bowlby, recognizing the infant's life and death dependency on a caretaker, defined separation as the "basic anxiety of infancy." The mother's leaving is so potentially dangerous that the infant responds

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Dorokhov, A. S., А. G. Aksenov, A. V. Sibirev, M. A. Mosyakov, and N. V. Sazonov. "Study of an Exhaust Gas Heat Separation System for the Beet Harvester." Agricultural Machinery and Technologies 16, no. 1 (2022): 19–26. http://dx.doi.org/10.22314/2073-7599-2022-16-1-19-26.

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It was noted that increased soil moisture worsens the quality of harvesting root crops due to a decrease in the completeness of separation. To increase the separating capacity of a slotted cleaner for root crops, it was proposed to improve the heating of the separating surface with hot exhaust gas. (Research purpose) To optimize the design and technological parameters of an exhaust gas heat separation system of the sugar beet harvester power plant. (Materials and methods) Federal Scientific Agroengineering Center VIM developed an exhaust gas heat separation system for harvesting root crops and

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Brăcăcescu, Carmen, Ioan Ţenu, Costin Mircea, and George Bunduchi. "Experimental research on influence of functional parameters of combined installations designed at separating the impurities out of cereal seeds." E3S Web of Conferences 112 (2019): 03004. http://dx.doi.org/10.1051/e3sconf/201911203004.

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The paper presents the experimental installation, the methodology and measuring apparatus used for experimental research of qualitative indexes of impurities separation out of grain seeds for combined separating systems (according to specific weight and aerodynamic properties of seeds). The experimental installation used was composed of a gravimetric separator with mechanical shaker with unbalanced masses (mounted on the platform working surface) and an aspiration installation with fan. The experimental research has aimed at quantitative and qualitative influence on separation quality index of

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Zhang, Yingying, Xuzhao Yang, Jingli Han, et al. "Screening of Pure ILs and DESs for CO2 Separation, N2O Separation, and H2S Separation Processes." International Journal of Chemical Engineering 2023 (February 18, 2023): 1–20. http://dx.doi.org/10.1155/2023/8691957.

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Ionic liquids (ILs) are proposed as potential “green” solvents with remarkable properties. Deep eutectic solvents (DESs) are a new type of ILs with additional properties, such as higher biodegradability and a lower price. ILs and DESs are “green” absorbents for various gas separations, such as CO2/N2, CO2/H2/CO, H2S/CH4, and N2O/N2. Due to their large number, the screening of ILs is crucial. Although ILs with high absorption capacities were screened using gas solubility and selectivity, it is important to consider the energy and solvents used in the process. In this paper, the absorbent amount

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Liu, Congmin, Xin Zhang, Junxiang Zhai, Xuan Li, Xiuying Guo, and Guangli He. "Research progress and prospects on hydrogen separation membranes." Clean Energy 7, no. 1 (2023): 217–41. http://dx.doi.org/10.1093/ce/zkad014.

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Abstract Membrane separation technologies, with a broad application prospect in the field of hydrogen separation, are characterized by the simplicity of the devices, high energy efficiency and environmental friendliness. The performance of separation membranes is the primary factor that determines the efficiency of hydrogen separation. Therefore, the development of hydrogen separation membranes is always a research focus. This paper presents and reviews the research developments and features of organic membranes, inorganic membranes and hybrid matrix membranes for hydrogen separations. First,

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Zhang, Hongrui, Chuanlian Liu, Luz María Mejía, and Heather Stoll. "Technical note: Accelerate coccolith size separation via repeated centrifugation." Biogeosciences 18, no. 5 (2021): 1909–16. http://dx.doi.org/10.5194/bg-18-1909-2021.

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Abstract. Coccolithophores play a key role in the marine carbon cycle and ecosystem. The carbonate shells produced by coccolithophore, named as coccolith, could be well preserved in the marine sediment for millions of years and become an excellent archive for paleoclimate studies. The micro-filtering and sinking–decanting methods have been successfully designed for coccolith separation and promoted the development of geochemistry studies on coccolith, such as the stable isotopes and Sr / Ca ratio. However, these two methods are still not efficient enough for the sample-consuming methods. In th

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Ma, Z., K.-L. Liaw, and Y. Zeng. "Spousal-Residence Separation among Chinese Young Couples." Environment and Planning A: Economy and Space 28, no. 5 (1996): 877–90. http://dx.doi.org/10.1068/a280877.

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Spousal-residence separation has become a serious social problem in China since the Cultural Revolution. Apart from housing shortages, the government's migration control, through the restriction on urban-household registration, is a main contributor to the separation. Based on the microdata of the 1987 National Population Survey, we find that the variation in spousal-residence separations among Chinese young couples in the mid-1980s is well explained by personal and household factors within a multivariate model. The separations were aggravated by migrations for the reasons of employment or edu

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Zhao, Liucheng, Shaoying Li, Xiaodong Yu, and Zhenfu Luo. "Effect of separating tank of compound dry separation bed on oil shale separation performance." Powder Technology 380 (March 2021): 311–20. http://dx.doi.org/10.1016/j.powtec.2020.11.001.

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Li, Feng Jiu, Yun Long Qu, Fu Ping Li, and Jin Rui Zhang. "Present Status of China's Hematite Processing Technology Study." Advanced Materials Research 734-737 (August 2013): 958–61. http://dx.doi.org/10.4028/www.scientific.net/amr.734-737.958.

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This paper describes the hematite beneficiation technology progress and equipment,the current research has through biological flotation, flotation and selective aggregation separation process for separating iron minerals.Can reach a maximum of iron grade of 67.50%, metal recovery rate of 75% of the final concentrate of current hematite beneficiation process for gravity separation magnetic separation reverse flotation process.

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Gerber, C. T., B. Bhushan, and N. V. Gitis. "Experimental Study of Long-Term Static Friction and Magnetic Slider/Disk Interplanar Separation." Journal of Tribology 118, no. 1 (1996): 12–20. http://dx.doi.org/10.1115/1.2837067.

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Capacitance between a slider and disk was measured to relate slider/disk interplanar separation to static friction. The parallel plate capacitance formula was used to convert the capacitance into separation with a resolution of less than 1 nm. Separation and coefficient of static friction (stiction) were measured using assorted lubricant thicknesses with and without bonding on polished and textured disks. Separation was measured during contact start/stop (CSS) and long term slider dwell times, after which static friction was measured. Polished disks had high stiction events with smaller separa

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El-Naggar, Ashraf Yehia. "Thermal and Hydrothermal Treatment of Silica Gels as Solid Stationary Phases in Gas Chromatography." Journal of Analytical Methods in Chemistry 2013 (2013): 1–6. http://dx.doi.org/10.1155/2013/931067.

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Silica gel was prepared and treated thermally and hydrothermally and was characterized as solid stationary phase in gas chromatography. The characteristics have been evaluated in terms of polarity, selectivity, and separation efficiencies. These parameters were used to assess the outer silica surface contributions and the degree of surface deactivation brought about by different treatment techniques. The parent silica elutes the paraffinic hydrocarbons with high efficiency of separation and elutes aromatic hydrocarbons with nearly good separation and has bad separation of alcohols. The calcine

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Hrytsaka, O. M. "Theoretical researches of threshing and separation processes of bread mass by the threshing-separating device." Mehanization and electrification of agricultural, no. 12 (2020): 60–66. http://dx.doi.org/10.37204/0131-2189-2020-12-7.

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Annotation Purpose. Theoretical researches of increase of efficiency of working processes of threshing, separation of grain mass by combine harvesters by improvement and use of a multi-drum design of the threshing-separating device with rational design and technological parameters of work capable to provide necessary agrotechnical requirements. Methods. In theoretical researches the analysis of interaction of the threshing-separating device with grain mass with use of mathematical modeling of processes of threshing of grain, separation of a rough heap and their estimation is carried out. Resul

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Zhao, Qin, Biao Ma, Cenbo Xiong, Liang Yu, Bing Fu, and Shufa Yan. "Modeling of the Dynamics of Conical Separate Plates in a Wet Multi-Disc Clutch." Lubricants 13, no. 6 (2025): 262. https://doi.org/10.3390/lubricants13060262.

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Wet multi-disc clutches in transmission systems suffer from the incomplete separation of the friction components, which raises the drag torque and results in power loss and heightened fuel consumption. This incomplete separation arises from the force imbalance between resistance forces, such as the oil viscosity force, and the lack of an axial separating force. Therefore, providing an axial separating force is a potential solution to this problem. In this investigation, small-angle conical separate plates were designed which can provide the elastic restoring force during the separation process

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