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Journal articles on the topic 'Sublimation'

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Author: Grafiati

Published: 4 June 2021

Last updated: 1 August 2024

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1

Chervet, Emmanuelle. "Nécessité et insuffisance des sublimations." Revue française de psychanalyse Vol. 87, no. 4 (September 20, 2023): 865–73. http://dx.doi.org/10.3917/rfp.874.0865.

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L’auteure discute l’idée de Laurent Danon-Boileau d’une origine de la sublimation liée à un manque de représentations inconscientes qui exige le traitement de l’excitation traumatique en excès. Elle propose d’introduire aussi le rôle du surmoi pour permettre l’aboutissement de la sublimation, processus actif qui passe par la trouvaille d’un objet du monde à transformer. C’est de l’articulation de la sublimation à l’identification que dépend sa valeur élaborative pour la psyché. Une vignette clinique illustre le fait qu’une rupture dans la sublimation ouvre à l’élaboration d’un pan de l’histoire qu’elle occultait. Quelques précisions sont proposées sur la différenciation entre sublimations « ordinaires » et sublimations « d’exception ».

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2

Gronbach, Manuel, Laura Kraußer, Timo Broese, Christina Oppermann, and Udo Kragl. "Sublimation for Enrichment and Identification of Marker Compounds in Fruits." Food Analytical Methods 14, no. 6 (January 14, 2021): 1087–98. http://dx.doi.org/10.1007/s12161-020-01954-6.

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AbstractIn this article, we describe the benefits of sublimation for natural product and food chemistry. The direct sublimation of substances from dried plant powders has not received much attention in research in the past, just like the sublimation of substances from dried plant extracts. We used sublimation to study dried sea buckthorn berry powders and dried sea buckthorn berry extracts. The results of the powder sublimations were compared to that of dried chokeberry, wolfberry, and European cornel powder. 52 marker substances of which 27 are specific for sea buckthorn were found in the sea buckthorn powder sublimates using LC/MS. The majority of them are not described in the literature and were obtained by direct sublimation. Accordingly, sublimation can help to identify new plant constituents. Our identification method was validated by the analysis of four commercially available fruit powders. The sea buckthorn powder showed an almost 80% correlation with the determined marker substances, whereas the other fruit powders did not achieve more than 38% correlation. The sublimates of sea buckthorn extracts show additional marker substances compared to the fruit powder sublimate, and we think that both techniques can be used to fight food fraud.

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3

Neumann, T. A., M. R. Albert, R. Lomonaco, C. Engel, Z. Courville, and F. Perron. "Experimental determination of snow sublimation rate and stable-isotopic exchange." Annals of Glaciology 49 (2008): 1–6. http://dx.doi.org/10.3189/172756408787814825.

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AbstractSnow sublimation is a fundamental process that affects the snow crystal structure and is important for ice-core interpretation, remote sensing, snow hydrology and chemical processes in snow. Prior studies have shown that sublimation can change the isotopic content of the remaining snow; these studies have inferred sublimation rates using field data, and were unable to control many of the environmental parameters that determine sublimation rate (e.g. temperature, relative humidity, snow microstructure). We present sublimation rate measurements on snow samples in the laboratory, where we have controlled many of these parameters simultaneously. We use the same experimental apparatus to determine sublimation rate, investigate the isotopic effects of sublimation, and study the isotopic exchange between vapor and solid. Our results suggest that pore spaces in snow are almost always at saturation vapor pressure; undersaturation may be possible in large pore spaces or in regions of rapid interstitial airflow. We present a revised formulation for determining the mass-transfer coefficient for snow as a linear function of Reynolds number (hm = 0.566Re + 0.075), estimate the fractionation coefficient for sublimating snow, and provide evidence for isotopic exchange between vapor and solid.

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4

Anishchenko, Oleksandr, Volodymyr Kukhar, Viktor Agarkov, and Alla Vorobeva. "Mathematical model development for superplastic forming of sheet shells by subliming agent gas pressure." E3S Web of Conferences 135 (2019): 01002. http://dx.doi.org/10.1051/e3sconf/201913501002.

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The authors presented in the article an analytical model of superplastic forming of spherical shells by pressure of the gas (gaseous phase) created upon sublimation of sublimate agent. Sublimate was placed in a hermetic cavity between the workpiece and the presser cover and heated to the temperature of its sublimation. The model uses the Berthelot equation for the state of real gases, the Bernoulli relation, and the F. Jovane equations for adjusting the shell forming pressure as a function of its relative height, the heat balance equation for the sublimation process, and the Clausius-Clapeyron relation for sublimation of substances. The authors showed that the superplastic forming pressure control can be effectively applied by the way of change in the forming temperature relative to temperature of sublimate agent sublimation. The experimental results of forming of shells from aluminum alloys AlMg3Mn, AlMg5Mn and AlMg6Mn, confirming theoretical calculations of the velocity and temperature conditions of superplastic forming by the sublimating agent pressure.

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5

Guilhon, David, Rodolfo Nucci Porsani, Luis Carlos Paschoarelli, and Olímpio José Pinheiro. "Sublimation intended for small formats: historical dimension, procedural steps, supplies and equipment." Revista de Ciencia y Tecnología, no. 39 (May 1, 2023): 35–44. http://dx.doi.org/10.36995/j.recyt.2023.39.005.

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Sublimation is a digital printing process that emerged as a response to gaps left by the graphic limitations of screen printing. But, in the recent history of digital printing, the adaptation of inks in home printers for sublimation of smallruns and formats, resulted in the exponential popularization of the technology. However, the scientific knowledgeabout sublimation is still incipient, especially the one that deals with small formats, common in the workshops of entrepreneurs in the personalized branch. Therefore, this article seeks to present in a detailed way the sublimationof small formats, its historical dimension, procedural steps, inputs and equipment.

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6

Trebukhov, Sergey, Valeriy Volodin, Alina Nitsenko, Xeniya Linnik, Erkebulan Kilibayev, Olga Kolesnikova, and Yury Liseitsev. "Dearsenation of Gold-Bearing Composite Concentrates without Forced Displacement in a Sublimator." Journal of Composites Science 7, no. 9 (September 11, 2023): 378. http://dx.doi.org/10.3390/jcs7090378.

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The primary devices for extracting volatile components from dispersed materials in a vacuum are devices with the movement of raw materials by directed vibrations. During the analysis of the operation of such installations, some shortcomings were identified, due to the supply of heat flow to the processed raw material and the requirements for the choice of structural materials. In this article, the authors tested a heating method and a design of a sublimator with the supply of heat flow to the dispersed material by radiation from the heater. The sublimation zone is made in the form of a shaft formed by simple-shaped plates, the design and material of which involve the use of refractory and ceramic materials that are inert with respect to an aggressive vaporous sulfide medium. The movement of bulk material through the volume of the sublimator occurs due to rheological properties: sliding along inclined plates. Technological tests on the sublimation of arsenic sulfides from gravity and flotation composite concentrates of the Bakyrchik deposit (Kazakhstan) have shown the possibility of a high degree of sublimation of arsenic (more than 96–99%) while preserving precious metal composites in the sublimation residue and stable operation of equipment. Sublimation residues containing 0.14–0.30% As can be processed by known methods. The possibility of sufficiently complete removal of arsenic and its compounds from composite concentrates at a reduced pressure with the removal of the latter in the most environmentally friendly sulfide form has been established.

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7

Magee, Nathan, Kayla Spector, Yi-Hsuan Lin, Corey Tong, and John Beatty. "Initial Ice Microparticle Sublimation Measurements from the Levitating Upper-Tropospheric Environmental Simulator (LUTES)." Journal of Atmospheric and Oceanic Technology 28, no. 7 (July 1, 2011): 884–90. http://dx.doi.org/10.1175/jtech-d-11-00028.1.

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Abstract Initial ice particle sublimation data are presented from the new Levitating Upper-Tropospheric Environmental Simulator (LUTES) at The College of New Jersey. This experimental system mimics the conditions of a typical cirrus cloud in order to evaluate the phase-change kinetics of single ice particles. These ice particles are charged and then trapped in a levitating electrodynamic balance where they can be observed as they sublimate in a subsaturated atmosphere. Levitation and sublimation take place within a vacuum chamber, which is contained in a freezer at a temperature of −40° to −80°C and is capable of a reduced pressure of 10 mb. The sublimation rates of the ice particles are observed at a variety of temperature, humidity, and pressure conditions and are compared to sublimation rates predicted by particle-scale diffusion models. Initial measurements suggest that the diffusion models are capturing the essential sublimation behavior of the particles, but further measurements promise to inform lingering questions about the fundamental thermodynamics and surface processes of sublimating and growing ice particles under cirrus conditions.

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8

Beretta, Gian Paolo, Alfonso Niro, and Mario Silvestri. "Solid Slider Bearings Lubricated by Their Own Melting or Sublimation." Journal of Tribology 109, no. 2 (April 1, 1987): 296–300. http://dx.doi.org/10.1115/1.3261355.

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We study the steady-state hydrodynamic lubrication of a solid-solid sliding bearing with spontaneous fusion or sublimation of the solid slider substance. Lubrication is sustained by the fluid film produced by fusion or sublimation. Our analysis extends the recent literature on liquid film lubrication of a melting solid slider to the interesting case of gaseous film lubrication of a sublimating solid slider. The results are in the form of analytical expressions showing the explicit influence of every parameter of the problem, together with conditions specifying the range of validity, and conditions guaranteeing that fusion or sublimation develop the necessary supply of lubricant. For substances like water and bismuth that contract upon melting, we extend the results to the interesting range of conditions dominated by the effect of pressure on the melting temperature.

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9

Corcos, Maurice. "Sublimation." Le Carnet PSY N�223, no. 2 (2019): 22. http://dx.doi.org/10.3917/lcp.223.0022.

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10

Rodriguez, Beatriz. "Sublimation." Annals of Internal Medicine 155, no. 1 (July 5, 2011): 60. http://dx.doi.org/10.7326/0003-4819-155-1-201107050-00009.

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11

King, Cindy. "Sublimation." Callaloo 35, no. 4 (2012): 882. http://dx.doi.org/10.1353/cal.2013.0045.

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12

Bhat, Shashi. "Sublimation." Missouri Review 30, no. 3 (2007): 116–30. http://dx.doi.org/10.1353/mis.2007.0125.

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13

Haigh, Jennifer. "Sublimation." Ploughshares 40, no. 1 (2014): 100–110. http://dx.doi.org/10.1353/plo.2014.0023.

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14

Duparc, François. "Sublimation de vie, Sublimation de mort." Revue française de psychosomatique 46, no. 2 (2014): 91. http://dx.doi.org/10.3917/rfps.046.0091.

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15

King, J. C., P. S. Anderson, and G. W. Mann. "The seasonal cycle of sublimation at Halley, Antarctica." Journal of Glaciology 47, no. 156 (2001): 1–8. http://dx.doi.org/10.3189/172756501781832548.

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AbstractWe have used micrometeorological data collected at Hailey Research Station, Antarctica, to estimate monthly totals of snow sublimation. Direct sublimation from the snow surface is calculated using bulk-transfer formulae, while the sublimation of blowing snow is estimated using a model for suspended-particle number density and individual particle sublimation rates. During the winter months, sublimation losses are negligible, but between November and March sublimation removes around 25% of the snowfall. Surface sublimation and sublimation of blowing snow make roughly equal contributions to this total. Estimates of sublimation using micrometeorological data agree well with estimates made from daily snow-stake measurements.

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16

Kamalapurkar, Krishnamurthy A., Mahesh P. Chitali, and Revansidh R. Pujari. "Formulation development and characterization of fast dissolving tablets of oxcarbazepine." Indian Journal of Pharmaceutical and Biological Research 3, no. 01 (March 31, 2015): 11–17. http://dx.doi.org/10.30750/ijpbr.3.1.3.

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The objective of this study was formulation development and evaluation of Oxcarbazepine Fast Dissolving Tablets (FDTs) prepared by sublimation technique where different sublimating agents like camphor and menthol were used with L-HPC and crospovidone as a superdisintegrants. Oxcarbazepine is an anticonvulsant drug used in the treatment of epilepsy and bipolar disorder. Each sublimating agent was used in concentration of 10-20 mg per tablet. Tablets were first prepared and then kept in hot air oven for sublimation. The prepared FDTs were evaluated for weight variation, thickness, drug content, friability, hardness, wetting time, water absorption ratio, in-vitro dispersion time, in-vitro disintegration time and in-vitro dissolution time. All formulations showed disintegration time ranging from 8 to 332sec. Optimized batch (SA6) was selected for the stability studies. The results of stability studies revealed that there was no remarkable difference in the tested parameters of promising formulation after storage for 3 months at 400 c ± 20 c 75% ± 5%RH and at room temperature 65% ± 5%RH as compared to initial results All the prepared formulae complied with Pharmacopoeia requirements of drug contents.

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17

Gutton, Philippe. "Sublimation pubertaire." Adolescence 78, no. 4 (2011): 895. http://dx.doi.org/10.3917/ado.078.0895.

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18

Soler, Colette. "La sublimation." Che vuoi ? 19, no. 1 (2003): 155. http://dx.doi.org/10.3917/chev.019.0155.

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19

Chaboudez, Gisèle. "Sexuation, sublimation." Figures de la psychanalyse 43, no. 1 (September 19, 2022): 63–76. http://dx.doi.org/10.3917/fp.043.0063.

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20

VAN HAUTE, Philippe. "About Sublimation." Ethical Perspectives 5, no. 3 (October 1, 1998): 218–24. http://dx.doi.org/10.2143/ep.5.3.563085.

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21

Civitarese, Giuseppe. "On sublimation." International Journal of Psychoanalysis 97, no. 5 (October 2016): 1369–92. http://dx.doi.org/10.1111/1745-8315.12530.

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22

Tidhar Nir. "Adorno and Marcuse: Artistic Sublimation versus Ideological Sublimation." Cultural Critique 101 (2018): 84. http://dx.doi.org/10.5749/culturalcritique.101.2018.0084.

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23

Nir, Tidhar. "Adorno and Marcuse: Artistic Sublimation Versus Ideological Sublimation." Cultural Critique 101, no. 1 (September 2018): 84–101. http://dx.doi.org/10.1353/cul.2018.a712976.

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24

Sokratov, Sergey A., and Vladimir N. Golubev. "Snow isotopic content change by sublimation." Journal of Glaciology 55, no. 193 (2009): 823–28. http://dx.doi.org/10.3189/002214309790152456.

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AbstractWe present results from cold-laboratory observations of changes in isotopic (δ18O and δD) content by sublimation in snow and ice samples under nearly isothermal conditions. The results show large increases in observed δ18O and δD in snow samples within several centimeters of the surface. They contradict the assumption of a non-changing isotopic content due to layer-by-layer transport mechanisms driven by sublimation/desublimation processes. The data also do not support the idea that isotopic changes of snow and firn are limited by the possibility that the ice matrix incorporates the atmospheric water vapor and that forced water-vapor diffusion in the pore space (wind pumping) is a requirement for isotopic content change. The observations show that sublimation from ice samples results in much lower increases in heavy-isotope content in the first several millimetres near the sublimating surface over the same time period, despite sublimation intensities similar to those of the snow samples. The results suggest that continuous phase transitions inside snow (recrystallization) are the process responsible for the isotopic content change because they are the primary mass-exchange mechanism between the snow mass and the surrounding environment. Modeling the isotopic content of the ice matrix therefore requires inclusion of a two-stage process: fractionation at the ice-matrix surface due to repetitive phase transitions, and fractionation due to preferable diffusion of light water isotopes in the pore space. For interpretation of the observed natural isotopic profiles in snow, the first process can be linked to the time a snow layer undergoes recrystallization, while the second process is related to the total ice/snow mass gain/loss determined by the external environmental conditions.

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25

Bolmal, Uday, C. K. Pandey, V. Phatarpekar, N. G. Dhople, and Rajkumar Kotha. "Comparative Evaluation of Isoniazid and Rifampicin Dispersible Tablets Prepared by Direct Compression and Sublimation Methods." International Journal of Pharmaceutical Sciences and Nanotechnology 6, no. 4 (December 31, 2013): 2225–39. http://dx.doi.org/10.37285/ijpsn.2013.6.4.5.

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Dispersible tablets are gaining popularity over conventional tablets due to its increased popularity for administration to pediatric and geriatric patients as it provides quick onset of action and ease of administration. An attempt had been made, to develop dispersible tablet of isoniazid and rifampicin combination by direct compression and sublimation method, to increase the bioavailability of the anti-tubercular agents as well to provide the local delivery in the case of oral tuberculosis. Formulation F1 to F8 (2% and 4% w/w of different superdisintegrants (crospovidone, pregelatinized starch, croscarmellose sodium and sodium starch glycolate) formulated by direct compression method. The formulations containing 4% of superdisintegrants (F2, F4, F6, and F8) were selected as optimized and hence 4% of superdisintegrants were used for sublimation method (F9 to F12). The effects of sublimating material (camphor) on drug release profile and disintegration property were evaluated. Studies on two different methods showed sublimation method as a better alternative as its formulations rapidly disintegrates, disperse and shows faster drug release (in 14 min) in comparison to direct compression (in 20 min). Pre-compression parameters of formulation blends indicated good flow properties and compressibility. Simultaneous estimation was performed for calculation of drug content and % drug release. In vitro release data analysis revealed 90% drug release. F9 formulation (sublimation) showed best anti-tubercular activity. F2, F9 formulations were found to be stable even after 90 days. Hence it is evident from this study that fast dissolving tablets could be a promising delivery system for isoniazid and rifampicin with improved drug availability and better patient compliance.

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26

Bemska, Jadwiga, and Joanna Szkudlarek. "Surface modification of cotton fabrics for sublimation printing." Autex Research Journal 13, no. 3 (September 30, 2013): 67–70. http://dx.doi.org/10.2478/v10304-012-0026-4.

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Abstract The use of sublimation thermal transfer printing onto cotton is not widely practiced because of the lack of disperse dyes affinity for cellulose fibres. The studies were performed onto polymer application on cotton fibres in order to achieve the ability to absorption of sublimating dyes and thus the possibility of making printouts onto cotton. The following parameters were evaluated: whiteness degree after impregnation, the relative strength of colours of the obtained printouts, test washing fastness, and dry and wet rubbing fastness.

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27

Huang, Ning, and Guanglei Shi. "The significance of vertical moisture diffusion on drifting snow sublimation near snow surface." Cryosphere 11, no. 6 (December 20, 2017): 3011–21. http://dx.doi.org/10.5194/tc-11-3011-2017.

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Abstract. Sublimation of blowing snow is an important parameter not only for the study of polar ice sheets and glaciers, but also for maintaining the ecology of arid and semi-arid lands. However, sublimation of near-surface blowing snow has often been ignored in previous studies. To study sublimation of near-surface blowing snow, we established a sublimation of blowing snow model containing both a vertical moisture diffusion equation and a heat balance equation. The results showed that although sublimation of near-surface blowing snow was strongly reduced by a negative feedback effect, due to vertical moisture diffusion, the relative humidity near the surface does not reach 100 %. Therefore, the sublimation of near-surface blowing snow does not stop. In addition, the sublimation rate near the surface is 3–4 orders of magnitude higher than that at 10 m above the surface and the mass of snow sublimation near the surface accounts for more than half of the total snow sublimation when the friction wind velocity is less than about 0.55 m s−1. Therefore, the sublimation of near-surface blowing snow should not be neglected.

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28

Gemes, Ken. "Freud and Nietzsche on Sublimation." Journal of Nietzsche Studies 38, no. 1 (2009): 38–59. http://dx.doi.org/10.2307/20717974.

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Abstract The notion of sublimation is essential to Nietzsche and Freud. However, Freud's writings fail to provide a persuasive notion of sublimation. In particular, Freud's writings are confused on the distinction between pathological symptoms and sublimation and on the relation between sublimation and repression. After rehearsing these problems in some detail, it is proposed that a return to Nietzsche allows for a more coherent account of sublimation, its difference from pathological symptoms, and its relation to repression. In summary, on Nietzsche's account, while repression and pathological symptoms involve a disintegration (of the self), sublimation involves integration. The article concludes with a brief consideration of some post-Freudian accounts of sublimation that represent a return to a more Nietzschean approach.

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29

Gemes, Ken. "Freud and Nietzsche on Sublimation." Journal of Nietzsche Studies 38, no. 1 (2009): 38–59. http://dx.doi.org/10.2307/jnietstud.38.2009.0038.

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Abstract The notion of sublimation is essential to Nietzsche and Freud. However, Freud's writings fail to provide a persuasive notion of sublimation. In particular, Freud's writings are confused on the distinction between pathological symptoms and sublimation and on the relation between sublimation and repression. After rehearsing these problems in some detail, it is proposed that a return to Nietzsche allows for a more coherent account of sublimation, its difference from pathological symptoms, and its relation to repression. In summary, on Nietzsche's account, while repression and pathological symptoms involve a disintegration (of the self), sublimation involves integration. The article concludes with a brief consideration of some post-Freudian accounts of sublimation that represent a return to a more Nietzschean approach.

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30

Polyansky, K. K. "Economic and mathematical approach to optimization of vacuum-freeze drying of the enzyme preparation inulinase Bacillus polymyxa 29." Proceedings of the Voronezh State University of Engineering Technologies 82, no. 2 (September 18, 2020): 31–35. http://dx.doi.org/10.20914/2310-1202-2020-2-31-35.

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One of the promising directions of improving the processes of processing plant raw materials is bioconversion using enzyme preparations, the use of which allows you to significantly change, intensify and improve existing technologies for the production of food products as a system of energy-efficient processes. The subject of the study is the enzyme preparation of inulinase Bacillus polymyxa 29, which ensures the conversion of the plant polymer inulin to fructose. Fructose has an increased interest in food technologies as a safer human health alternative to sucrose. Fructose yield reaches 90–95%; the sweetness coefficient of fructose is 1.73 times higher than sucrose. Production of enzyme with maximum activity is achieved by vacuum-sublimation drying at time-programmed mode of heat supply control taking into account limitations due to quality of heat exchange and economic feasibility of the process. Method of selection of optimal solutions in vacuum-sublimation drying of feather preparation Bacillus polymyxa 29 according to profit index is proposed. The proposed approach resolved the main technical gap between productivity and energy consumption. An optimal loading of the sublimator has been established, which ensures the minimization of specific electric power consumption for various values of the initial moisture drying of the enzyme, taking into account the given efficiency of the vacuum sublimation dryer.

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31

Pestoni, B., K. Altwegg, H. Balsiger, N. Hänni, M. Rubin, I. Schroeder, M. Schuhmann, and S. Wampfler. "Detection of volatiles undergoing sublimation from 67P/Churyumov-Gerasimenko coma particles using ROSINA/COPS." Astronomy & Astrophysics 645 (January 2021): A38. http://dx.doi.org/10.1051/0004-6361/202039130.

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Context. The ESA Rosetta mission has allowed for an extensive in situ study of the comet 67P/Churyumov-Gerasimenko. In measurements performed by the ram gauge of the COmet Pressure Sensor (COPS), observed features are seen to deviate from the nominal ram gauge signal. This effect is attributable to the sublimation of the volatile fraction of cometary icy particles containing volatiles and refractories. Aims. The objective of this work is to investigate the volatile content of icy particles that enter the COPS ram gauge. Methods. We inspected the ram gauge measurements to search for features associated with the sublimation of the volatile component of cometary particles impacting the instrument. All the sublimation features with a high-enough signal-to-noise ratio were modelled by fitting one or more exponential decay functions. The parameters of these fits were used to categorise different compositions of the sublimating component. Results. Based on features that are attributable to ice sublimation, we infer the detection of 73 icy particles containing volatiles. Of these, 25 detections have enough volatile content for an in-depth study. From the values of the exponential decay constants, we classified the 25 inferred icy particles into three types, interpreted as different volatile compositions, which are possibly further complicated by their differing morphologies. The available data do not give any indication as to which molecules compose the different types. Nevertheless, we can estimate the total volume of volatiles, which is expressed as the diameter of an equivalent sphere of water (density of 1 g cm−3). This result was found to be on the order of hundreds of nanometres.

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32

Hari, Kuralla, Saripilli Rajeswari, and Kolapalli Venkata Ramanamurthy. "PREPARATION AND EVALUATION OF ORALLY DISINTEGRATING TABLETS OF DROTAVERINE HYDROCHLORIDE USING SUBLIMATION TECHNIQUE." International Journal of Pharmacy and Pharmaceutical Sciences 10, no. 5 (May 1, 2018): 85. http://dx.doi.org/10.22159/ijpps.2018v10i5.24503.

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Objective: To formulate orally disintegrating taste masked tablets of drotaverine hydrochloride (HCl) by sublimation technique.Methods: Initially superdisintegrant was selected and its concentration was optimized by pre-compression and post-compression parametric evaluation. Camphor and menthol were used as sublimating agents alone and in combination to mask the taste of drotaverine hydrochloride. Prepared tablets were evaluated for physicochemical evaluation, in vitro dissolution studies and fourier transformation-infrared spectroscopy, differential scanning calorimetry and X-ray diffractometry studies.Results: The optimised formulation DCM2 prepared with a mixture of camphor and menthol was characterised by fourier transformation-infrared spectroscopy, differential scanning calorimetry and X-ray diffractometry studies and found no incompatibility and no major shifts were noticed.Conclusion: The results demonstrated that the prepared drotaverine HCl orally disintegrating tablets showed better taste masking. The present sublimation technique can be effectively used for taste masking and also for orally disintegrating tablets.

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33

MacDonald, M. K., J. W. Pomeroy, and A. Pietroniro. "On the importance of sublimation to an alpine snow mass balance in the Canadian Rocky Mountains." Hydrology and Earth System Sciences 14, no. 7 (July 30, 2010): 1401–15. http://dx.doi.org/10.5194/hess-14-1401-2010.

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Abstract. A modelling study was undertaken to evaluate the contribution of sublimation to an alpine snow mass balance in the Canadian Rocky Mountains. Snow redistribution and sublimation by wind, snowpack sublimation and snowmelt were simulated for two winters over an alpine ridge transect located in the Canada Rocky Mountains. The resulting snowcover regimes were compared to those from manual snow surveys. Simulations were performed using physically based blowing snow (PBSM) and snowpack ablation (SNOBAL) models. A hydrological response unit (HRU)-based spatial discretization was used rather than a more computationally expensive fully-distributed one. The HRUs were set up to follow an aerodynamic sequence, whereby eroded snow was transported from windswept, upwind HRUs to drift accumulating, downwind HRUs. That snow redistribution by wind can be adequately simulated in computationally efficient HRUs over this ridge has important implications for representing snow transport in large-scale hydrology models and land surface schemes. Alpine snow sublimation losses, in particular blowing snow sublimation losses, were significant. Snow mass losses to sublimation as a percentage of cumulative snowfall were estimated to be 20–32% with the blowing snow sublimation loss amounting to 17–19% of cumulative snowfall. This estimate is considered to be a conservative estimate of the blowing snow sublimation loss in the Canadian Rocky Mountains because the study transect is located in the low alpine zone where the topography is more moderate than the high alpine zone and windflow separation was not observed. An examination of the suitability of PBSM's sublimation estimates in this environment and of the importance of estimating blowing snow sublimation on the simulated snow accumulation regime was conducted by omitting sublimation calculations. Snow accumulation in HRUs was overestimated by 30% when neglecting blowing snow sublimation calculations.

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Bintanja, Richard. "The mass balance of a dry snow surface during a snowstorm." Annals of Glaciology 38 (2004): 79–83. http://dx.doi.org/10.3189/172756404781814898.

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AbstractThis paper focuses on the surface mass balance of a horizontally homogeneous snowfield, with emphasis on the effects of snowdrift sublimation. A one-dimensional model of the atmospheric boundary layer that includes snowdrift physics and thermodynamics is used. In sufficiently strong winds, snow particles are eroded from the surface. Once airborne, they are susceptible to sublimation. Averaged over longer time periods, the net erosive flux equals sublimation of snowdrift. However, model results show that there is no such balance in the course of a snowstorm event. They also indicate that snowdrift sublimation tends to enhance net erosion, but the increase occurs more slowly than the mass transfer by snowdrift sublimation, and the maximum is smaller. This difference in temporal behaviour influences the average erosion rate owing to non-linear interactions between snowdrift sublimation, drift density and erosion. Since the increase in relative humidity due to snowdrift diminishes surface sublimation, the average change in total ablation induced by snowdrift sublimation remains small. Observations made during snowdrift episodes in Antarctica agree qualitatively with some of the model results.

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Matsumura, Keisuke, Kodo Kawase, and Kei Takeya. "Observation of sublimation of ice using terahertz spectroscopy." Royal Society Open Science 7, no. 9 (September 2020): 192083. http://dx.doi.org/10.1098/rsos.192083.

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Although many studies have investigated the phase change of water, few have focused on the sublimation of ice. This study revealed that ice sublimation can be observed using terahertz (THz) spectroscopy. From measurements in the range of 210–270 K, the sublimation was observed over the entire temperature range and the rate of sublimation was increased proportionally with temperature. Particularly on a time scale of a few hundred minutes, the sublimation progresses visibly above 250 K. Above a certain temperature, the absorption coefficient increased during sublimation. These findings suggest that an interesting phenomenon may occur in the phase change of water at sub-zero temperatures, indicating that THz spectroscopy would be useful for measuring water and ice.

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Wu, Ting-Ying, Chendi Gao, Man-Chen Huang, Zhi Zhang, Peng-Yuan Wang, Hsun-Yi Chen, Guosong Chen, and Hsien-Yeh Chen. "Vapor-Stripping and Encapsulating to Construct Particles with Time-Controlled Asymmetry and Anisotropy." Coatings 10, no. 12 (December 18, 2020): 1248. http://dx.doi.org/10.3390/coatings10121248.

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An innovative chemical vapor sublimation and deposition (CVSD) process was shown to produce nanoscale anisotropic hybrid materials. Taking advantage of controlled thermodynamic properties and the mass transfer of molecules, this process allowed for water vapor sublimation from an iced template/substrate and stagewise vapor deposition of poly-p-xylylene onto the sublimating ice substrate. In this study, the use of sensitive soybean agglutinin (SBA) protein tubes was demonstrated as an example to prepare the anisotropic hybrid material based on the CVSD process. The rationale of a timing parameter, Δt, was controlled to program the sublimation of the SBA-ice templates and the deposition of poly-p-xylylene during the CVSD process. As a result of this control, a stripping stage occurred, during which SBA tubes were exposed on the particle surface, and a subsequent encapsulation stage enabled the transformation of the ice templates into a nanometer-sized anisotropic hybrid material of poly-p-xylylene as the matrix with encapsulated SBA tubes. The timing parameter Δt and the controlled stripping and encapsulating stages during CVSD represent a straightforward and intriguing mechanism stemming from physical chemistry fundamentals for the fabrication of hybrid materials from sensitive molecules and with predetermined sizes and asymmetrical shapes. A simulation analysis showed consistency with the experimental results and controllability of the timing mechanism with predictable particle sizes.

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Kumar, Inder, Dipima Chaudhary, Bhumika Thakur, and Vinay Pandit. "Formulation and Evaluation of Piroxicam Fast Dissolving Tablets Using Direct Compression and Sublimation Method." Journal of Drug Delivery and Therapeutics 10, no. 3-s (June 15, 2020): 17–25. http://dx.doi.org/10.22270/jddt.v10i3-s.4063.

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Objective: In the present research work, fast dissolving tablets of Piroxicam were formulated by two different techniques i.e. direct compression method and sublimation method using different superdisintegrants. Methods: Twelve formulations were prepared (PXM1 to PXM12) in which first six formulation were prepared by direct compression technique and other six formulation were prepared by sublimation method by using camphor as a sublimating agent. Result and Discussion: All the formulations were subjected for precompression, post compression parameters, and shows all the data within the specific limits. Formulation PXM4 containing 5 % crospovidone showed 99.480 ± 0.291 % drug release in 20 min which was more than the drug release of rest of the formulations. The optimized formulation PXM4 was compared with the marketed formulation and it revealed that drug release of PXM4 was found to be 99.397 ± 0.751 % in 20 min, which was greater than the marketed formulation. Finally, results were statistically analysed by the application of one way ANOVA and t-test. The stability study of the optimized formulation PXM4 showed no significant changes in, drug content, disintegration time and in-vitro drug release. Conclusion: Piroxicam can be successfully prepared using direct compression technique and it will enhance the drug dissolution, which will further increase absorption and bioavailability of the drug. Keywords: Direct compression, fast dissolving tablets, sublimation, Piroxicam.

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Wang, Zhao Hui, and Ming Heng Shi. "The Effects of Sublimation-Condensation Region on Heat and Mass Transfer During Microwave Freeze Drying." Journal of Heat Transfer 120, no. 3 (August 1, 1998): 654–60. http://dx.doi.org/10.1115/1.2824333.

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The sublimation-condensation model, developed for freeze drying of unsaturated porous media in the author’s previous work, is analyzed numerically. The moisture redistribution in the sublimation-condensation region is taken into account in this model. The calculations show that the saturation of ice in the sublimation-condensation region will obviously decrease, and its effects on heat and mass transfer cannot be neglected for microwave freeze-drying of unsaturated porous media. The microwave freeze-drying tests of unsaturated beef are carried out. The experimental results show that the drying time is approximately proportional to the initial saturation of beef. Moreover the sublimation-condensation model is validated by the experimental results. These results show that the sublimation-condensation model agrees better with experimental results than the sublimation interface model.

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Ovenseri, Airemwen Collins, and Uhumwangho Uwumagbe Michael. "Formulation of Non-effervescent Floating Dosage Form of Metronidazole using Sintering and Sublimation Technique." Dhaka University Journal of Pharmaceutical Sciences 20, no. 1 (June 20, 2021): 11–17. http://dx.doi.org/10.3329/dujps.v19i2.50853.

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The aim of this study was to formulate a novel non-effervescent floating dosage form of metronidazole using the sublimation and sintering technique. Granules were formulated using the wet granulation technique. Ammonium bicarbonate (30% w/w) was incorporated as the sublimating agent. The granules were characterized for micromeritic properties. Thereafter, the granules were compressed using a single punch tableting machine and the physicotechnical properties were evaluated. The metronidazole tablet was then sintered at 70oC for 12 h. All granules were free flowing and compressible. The metronidazole tablets had no floating lag time showing that tablets floated instantaneously. FTIR and DSC studies showed that metronidazole and the excipients used in the formulation were compatible. Azadirachta indica gum was used in the formulation of non-effervescent floating dosage form of metronidazole using sublimation and sintering technique which is beneficial in sustained release formulations. Dhaka Univ. J. Pharm. Sci. 20(1): 11-17, 2021 (June)

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Lysenko, Vladimir I., Sergey A. Gaponov, Boris V. Smorodsky, Alexander D. Kosinov, and Mikhail I. Yaroslavtsev. "Stability of Supersonic Boundary Layer on the Sublimation Surface." Siberian Journal of Physics 15, no. 1 (2020): 42–61. http://dx.doi.org/10.25205/2541-9447-2020-15-1-42-61.

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Theoretical investigation of the supersonic flat-plate boundary-layer properties under conditions of the surface material sublimation has been performed for Mach number M = 2. Naphthalene (C10H8) was chosen as the substance for the sublimation coating. Performed computations show that with increasing surface temperature due to stagnation temperature increase, the mass flow rate of naphthalene evaporation increases. Calculations performed on the basis of linear stability theory show that such an increase of evaporation leads to a noticeable decrease of the local growth rates of unstable perturbations in the boundary layer. It is found that stabilization of the boundary layer by the surface coating sublimation occurs with increasing temperature of the sublimation coating, reaching a maximum near the triple point temperature of the sublimation material. The carried out experiments confirmed the stabilizing effect of surface sublimation.

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Pons-Nicolas, Sylvie. "Sublimations et deuil. Avatars de la trajectoire d’un processus." Revue française de psychanalyse Vol. 87, no. 4 (September 20, 2023): 853–63. http://dx.doi.org/10.3917/rfp.874.0853.

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L’auteur interroge la proposition de Laurent Danon-Boileau qui fait de l’élaboration de la castration un point déterminant pour différencier deux types de sublimations. Elle recherche les prémices de cette distinction dans les écrits théoriques de Freud et de certains auteurs post-freudiens comme Green et Duparc. Chemin faisant, la question du deuil de la perte, introduite par Freud dans « Éphémère destinée », l’amène à envisager la sublimation comme une consolation face à la « passagèreté » et l’incertitude. Ce qu’elle articule avec la perte de l’omnipotence, selon Winnicott. En appui sur la clinique présentée lors du colloque, elle aborde la fonction du public dans certaines sublimations artistiques « adressées », et propose qu’il y ait différents types de sublimations en fonction des avatars de la trajectoire du processus sublimatoire à l’œuvre dans la résolution du conflit œdipien. Ne s’agirait-il pas de distinguer entre des sublimations des pulsions partielles préœdipiennes et celles résolument post-œdipiennes, avec leur corollaire, la castration ?

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de Mijolla-Mellor, Sophie. "Sublimation et Symbolisation." Topique 151, no. 1 (May 27, 2021): 7–13. http://dx.doi.org/10.3917/top.151.0011.

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43

Žižek, Slavoj. "Death and Sublimation." American Journal of Semiotics 7, no. 3 (1990): 63–72. http://dx.doi.org/10.5840/ajs19907318.

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Reznik, Serge. "Sublimation contre perversion." Che vuoi ? 32, no. 2 (2009): 27. http://dx.doi.org/10.3917/chev.032.0027.

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Barus-Michel, Jacqueline. "Perversion et sublimation." Revue internationale de psychosociologie VIII, no. 19 (2002): 157. http://dx.doi.org/10.3917/rips.019.0157.

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BERNET, Rudolf. "Sublimation et symbolisation." Revue Philosophique de Louvain 96, no. 4 (November 1, 1998): 698–709. http://dx.doi.org/10.2143/rpl.96.4.541928.

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Aubert-Godard, Anne. "Handicap et sublimation." Champ psy 63, no. 1 (2013): 119. http://dx.doi.org/10.3917/cpsy.063.0119.

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de Mijolla-Mellor, Sophie. "Humour et Sublimation." Champ psy 67, no. 1 (2015): 93. http://dx.doi.org/10.3917/cpsy.067.0093.

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Denis, Paul. "Emprise et sublimation." Revue française de psychanalyse 82, no. 5 (2018): 1481. http://dx.doi.org/10.3917/rfp.825.1481.

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Bouchard, Christine. "Amour, langage, sublimation." Revue française de psychanalyse 60, no. 3 (1996): 765. http://dx.doi.org/10.3917/rfp.g1996.60n3.0765.

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