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Journal articles on the topic 'Dissoluion'

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Author: Grafiati

Published: 30 May 2022

Last updated: 31 May 2022

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1

Bech-Nielsen, G., and J. C. Reeve. "The Anodic Dissolution of Iron XII. Recent Findings Supplementing the Information about the Kinetics of the Dissoluion Reactions." Key Engineering Materials 20-28 (January 1991): 239–48. http://dx.doi.org/10.4028/www.scientific.net/kem.20-28.239.

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2

BRUYAKA, OLGA P. "ALLIANCE PARTNER DIVERSITY AND BIOTECH FIRMS' EXIT: DIFFERING EFFECTS ON DISSOLUION VS. DIVESTMENT." Academy of Management Proceedings 2008, no. 1 (August 2008): 1–6. http://dx.doi.org/10.5465/ambpp.2008.33622325.

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3

Suter, D., C. Siffert, B. Sulzberger, and W. Stumm. "Catalytic dissoluion of iron(III)(hydr)oxides by oxalic acid in the presence of Fe(II)." Naturwissenschaften 75, no. 11 (November 1988): 571–73. http://dx.doi.org/10.1007/bf00377723.

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4

Truesdale, Victor W. "Tidying up the environment: A journey from exponential curves to hydrodynamics in environmental batch dissolutions." Pure and Applied Chemistry 83, no. 5 (February 21, 2011): 1113–28. http://dx.doi.org/10.1351/pac-con-10-08-13.

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This paper reviews progress made over the last decade with the shrinking object approach to the kinetics of batch dissolution. It demonstrates how the O’Connor–Greenberg equation leads to three dissolutions: those that remain well undersaturated, those that saturate with a great excess of solid left-over, and those in the middle ground where saturation is approached or attained, but where much of the solid originally added dissolves. The equations that describe these conditions are discussed, alongside sample results that validate their use with test substances, for example, salts, sucrose, silica gel, and gypsum. The equations are then shown to be consistent with the hydrodynamic approach to dissolution. Finally, further work with middle-ground dissolutions of gypsum lead to a mechanism for the back-reaction, which involves the CaSO40 ion-pair. After comparison with existing studies of calcium carbonate dissolution, it is argued that this is a universal mechanism for salt dissolutions. The work improves batch dissolution as a technique to the point where it can be used synergistically with chemo-stat and rotating disc approaches. Suggestions are made for greater standardization in dissolution conditions, especially in environmental work where the data collected has to have global consistency.

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5

Kawanishi, Sakiko, Hiroyuki Shibata, and Takeshi Yoshikawa. "Contribution of Dislocations in SiC Seed Crystals on the Melt-Back Process in SiC Solution Growth." Materials 15, no. 5 (February 27, 2022): 1796. http://dx.doi.org/10.3390/ma15051796.

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The melt-back process has a significant effect on the quality of solution-grown SiC crystals. However, the phenomena surrounding the SiC dissolution into the molten alloy during the melt-back process have not been clarified. In this study, the behavior of 4H-SiC dissolution into molten alloy was investigated by using high-temperature in situ observation and subsequent KOH etching, and the effects of different doping conditions and crystal polarity were studied. Local dissolutions with hexagonal pyramid-shape originating from threading screw dislocation (TSD) were observed on the C face of n-type SiC with light nitrogen doping. Our analysis of their behavior revealed that the process was governed by the spiral dissolution. In addition to the dissolution at TSD, local dissolutions at threading-edge dislocations were observed on the Si face of the same crystal. The shape of the local dissolution at the dislocation was significantly affected by the doping conditions and the polarity of the SiC crystal. This local dissolution may occur during the melt-back process, suggesting that it is important to promote the dissolution while maintaining a smooth interface through the selection of the seed crystal and by keeping the degree of interface undersaturation small.

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6

Gupta, V. Rama Mohan, Srikanth K, Sree Giri Prasad, B, G. Naveen Kumar Reddy, and Sudheer B. "Formulation and Evaluation of Directly Compressible Agglomerates of Celecoxib." International Journal of Pharmaceutical Sciences and Nanotechnology 3, no. 4 (February 28, 2011): 1193–204. http://dx.doi.org/10.37285/ijpsn.2010.3.4.4.

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Prepared spherical crystals of Celecoxib to increase the compressible properties, dissolution rate and bioavailability, using hydrophilic polymers such as PEG-4000, sod.CMC, sod.alginate and PVP K-30. All the formulations were characterized for micromeritic properties, Drug loading, solubility, in vitro drug release and mean dissolutiom time (MDT). New formulations showed higher dissolution rates and less MDT values than the pure celecoxib. Among all, the crystals prepared with 10 % w/v PVP K-30 exhibited maximum dissolution rate (2.95±0.23%) and very less MDT values (18.50 ± 4.01 min). Hence it was considered as optimized formulation.

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7

Kim, Tae Hwan, Soyoung Shin, Seok Won Jeong, Jong Bong Lee, and Beom Soo Shin. "Physiologically Relevant In Vitro-In Vivo Correlation (IVIVC) Approach for Sildenafil with Site-Dependent Dissolution." Pharmaceutics 11, no. 6 (June 1, 2019): 251. http://dx.doi.org/10.3390/pharmaceutics11060251.

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This study aimed to establish a physiologically relevant in vitro-in vivo correlation (IVIVC) model reflecting site-dependent dissolution kinetics for sildenafil based on population-pharmacokinetic (POP-PK) modeling. An immediate release (IR, 20 mg) and three sustained release (SR, 60 mg) sildenafil tablets were prepared by wet granulation method. In vitro dissolutions were determined by the paddle method at pH 1.2, 4.5, and 6.8 media. The in vivo pharmacokinetics were assessed after oral administration of the prepared IR and SR formulations to Beagle dogs (n = 12). The dissolution of sildenafil from SR formulations was incomplete at pH 6.8, which was not observed at pH 1.2 and pH 4.5. The relative bioavailability was reduced with the decrease of the dissolution rate. Moreover, secondary peaks were observed in the plasma concentration-time curves, which may result from site-dependent dissolution. Thus, a POP-PK model was developed to reflect the site-dependent dissolution by separately describing the dissolution and absorption processes, which allowed for estimation of the in vivo dissolution of sildenafil. Finally, an IVIVC was established and validated by correlating the in vitro and in vivo dissolution rates. The present approach may be applied to establish IVIVC for various drugs with complex dissolution kinetics for the development of new formulations.

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8

Nasaruddin, Indo Yama. "Efficiency and Effectiveness of Disclosure of Cooperation with Online." Esensi: Jurnal Bisnis dan Manajemen 10, no. 1 (December 24, 2020): 95–108. http://dx.doi.org/10.15408/ess.v10i1.17826.

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This research measures the efficiency and effectiveness of the dissolution of cooperatives conducted online. To see the efficiency and effectiveness of using cooperative dissolution performance variables, utilization of online services, performance in online services and interest in utilizing online services for cooperatives in cooperative dissolution activities. The analysis technique used is descriptive analysis by looking at the percentage of answers from respondents. The object of this research is cooperatives that are listed as cooperatives which are dissolved in the area of East Java Province and Yogyakarta Special Region as regions that have many cooperative dissolutions. The results showed that the performance of the dissolution of cooperatives in the Special Region of Yogyakarta and East Java Province was an average of 3.53 in the predicate of moderate capacity. Utilization of online services is quite high. The performance of online services obtained the average results of respondents' answers of 4.09 are in the predicate of high capacity. Interest in the need for cooperative online services as an alternative to cooperative dissolution systems in the Special Region of Yogyakarta and East Java Province is high.

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9

Lasaga, Antonio C., and Andreas Lüttge. "Mineralogical approaches to fundamental crystal dissolution kinetics - Dissolution of an A3B structure." European Journal of Mineralogy 16, no. 5 (October 18, 2004): 713–29. http://dx.doi.org/10.1127/0935-1221/2004/0016-0713.

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10

Baihaqi, Ahmad Ichsan, Dyah Utami Cahyaning Rahayu, and E. Budianto. "Effect of Drug Loading Method on Drug Dissolution Mechanism of Amoxicillin Trihydrate Encapsulated in Chitosan-Poly(N-Vinylpyrrolidone) Full-IPN Hydrogel as a Floating Drug Delivery System Matrix." Materials Science Forum 964 (July 2019): 251–56. http://dx.doi.org/10.4028/www.scientific.net/msf.964.251.

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Amoxicillin trihydrate suits to be encapsulated into a modified matrix to increase its bioavailability. In this study, the effect of drug loading methods on drug dissolution mechanism from chitosan-poly(N-vinylpyrrolidone) hydrogel with CaCO3 as the effervescent agent has been studied. It was found that the encapsulation efficiency of in situ and post loading methods were 93% and 75%, respectively. The dissolution values were 94% and 98%, respectively for in situ and post loading. The dissolution test data was incorporated into zero-order, first-order, Higuchi and Korsmeyer-Peppas models to evaluate the kinetic and the mechanism of the drug dissolutions. The in situ loading method fits well to first-order model (R2 = 0.9772), while the post loading method fits well to Higuchi model (R2 = 0.9880). Based on Korsmeyer-Peppas model, the dissolution mechanism of in situ loading was Fickian diffusion (n = 0.4024), while post loading was a combination of diffusion and erosion (n = 0.5532). From the SEM images, it showed that the surface and cross-sectional of the post loading method hydrogel formed pores and pore channels, both before and after the dissolution test. Meanwhile, on the surface and the cross-sectional of in situ loading method hydrogel had pores and pore channels only after dissolution test.

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11

Murphy, William M. "Dislocations and feldspar dissolution." European Journal of Mineralogy 1, no. 3 (July 27, 1989): 315–26. http://dx.doi.org/10.1127/ejm/1/3/0315.

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12

Lalmi, Boubekeur, Christophe Girardeaux, Alain Portavoce, Jean Bernardini, and Bernard Aufray. "Unusual Behaviour of the Dissolutions Kinetics of one Monolayer of Si in Cu(001)." Defect and Diffusion Forum 289-292 (April 2009): 601–6. http://dx.doi.org/10.4028/www.scientific.net/ddf.289-292.601.

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We present an experimental study by Auger electron spectroscopy (AES) and low energy electron diffraction (LEED) of the dissolution of about one monolayer of silicon previously deposited at room temperature on Cu (001). The isochronal dissolution has been recorded in the temperature range [50-320°C] (annealing rate 1.5°C/min). The plateau observed in the kinetics dissolution for temperatures between 95°C and 240°C, reveals the formation of an intermetallic two dimensional superficial phase thermally stable in this range of temperature. On the plateau, LEED patterns show the formation of a (5x3) superstructure. Above 255°C, we observe a very fast dissolution of the surface alloy characteristic of a first-order surface transition. Isothermal dissolutions kinetics have been recorded above and under the surface transition temperature (250°C and 270°C). From these measurements, we have evaluated bulk diffusion coefficients of Si in Cu assuming a local equilibrium. The diffusion coefficients measured within this hypothesis at 250°C and 270°C are respectively higher and lower than those extrapolated from high temperature measurements for Ge in Cu.

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13

Posmet'ev, Valeriy, Vadim Nikonov, and Aleksey Matyashov. "RELEVANCE OF THE DEVELOPMENT AND USE IN THE STRUCTURE OF A TILLER ROAD TRAIN OF A REGENERATIVE SPRING-HYDRAULIC BONED DEVICE." Voronezh Scientific-Technical Bulletin 3, no. 3 (February 2, 2022): 102–16. http://dx.doi.org/10.34220/2311-8873-2022-102-116.

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The advantages are described, as well as the possibilities inherent in timber tractors with trailers-dissolutions to achieve high technical and economic indicators, significantly exceeding those of single timber vehicles, as well as other comparable layouts of timber haulers. The analysis of the scientific works of foreign authors was carried out, which made it possible to identify the most significant factors on which the efficiency of the process of hauling long-length timber products by timber tractors with dissolution trailers depends. The existing conditions for the hauling of long-length timber in the Russian Federation by timber tractors with a trailer, as well as the negative consequences of their operation in difficult road and climatic conditions, are considered. It has been established that the insufficient equipping of logging roads is accompanied for logging road trains by a forced unsteady mode of movement, which leads to failure due to the impact of alternating loads from the side of the trailer-dissolution with timber of the pivot assembly of the rotary conic devices of a timber tractor. In order to increase the efficiency of timber tractors with trailers-dissolutions, as well as to minimize the negative impact on the pivot assembly of alternating loads from the inertia forces of the trailer-dissolution with timber materials, a promising scheme of a recuperative spring-hydraulic rotary conical device is proposed. The necessary and sufficient tasks for the creation and practical use of the proposed device are formulated.

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14

STRØM, KAARE, and STEPHEN M. SWINDLE. "Strategic Parliamentary Dissolution." American Political Science Review 96, no. 3 (September 2002): 575–91. http://dx.doi.org/10.1017/s0003055402000345.

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An important agenda power in parliamentary democracies is the discretion over the dissolution of parliament. We argue that variation in constitutional rules and the political environment will systematically affect the frequency of early elections. We hypothesize that dissolution will be more frequent under single-party governments, when the head of state plays an insignificant role, when neither parliament nor the cabinet can inhibit dissolution, when minority governments are in power, when the head of state can dissolve unilaterally, and later in the constitutional term. Using standard logistic and Cox-proportional hazard techniques, we test these expectations in a pooled time-series setting against observations of most OECD parliamentary democracies for the years 1960–1995. We find that parliamentary dissolutions are more frequent earlier in the constitutional term, under minority governments, when the head of state plays an insignificant role, and when the parliament or the cabinet is not involved.

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15

Duque, Marcelo Dutra, Daniela Amaral Silva, Michele Georges Issa, Valentina Porta, Raimar Löbenberg, and Humberto Gomes Ferraz. "In Silico Prediction of Plasma Concentrations of Fluconazole Capsules with Different Dissolution Profiles and Bioequivalence Study Using Population Simulation." Pharmaceutics 11, no. 5 (May 5, 2019): 215. http://dx.doi.org/10.3390/pharmaceutics11050215.

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A biowaiver is accepted by the Brazilian Health Surveillance Agency (ANVISA) for immediate-release solid oral products containing Biopharmaceutics Classification System (BCS) class I drugs showing rapid drug dissolution. This study aimed to simulate plasma concentrations of fluconazole capsules with different dissolution profiles and run population simulation to evaluate their bioequivalence. The dissolution profiles of two batches of the reference product Zoltec® 150 mg capsules, A1 and A2, and two batches of other products (B1 and B2; C1 and C2), as well as plasma concentration–time data of the reference product from the literature, were used for the simulations. Although products C1 and C2 had drug dissolutions < 85% in 30 min at 0.1 M HCl, simulation results demonstrated that these products would show the same in vivo performance as products A1, A2, B1, and B2. Population simulation results of the ln-transformed 90% confidence interval for the ratio of Cmax and AUC0–t values for all products were within the 80–125% interval, showing to be bioequivalent. Thus, even though the in vitro dissolution behavior of products C1 and C2 was not equivalent to a rapid dissolution profile, the computer simulations proved to be an important tool to show the possibility of bioequivalence for these products.

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16

Noval, Noval, and Rosyifa Rosyifa. "SOLID DISPERSION FOR INCREASING DISSOLUTION RATE OF SODIUM DICLOFENAC WITH VARIATIONS OF POLYVINYL PYRROLIDONE K30." Journal of Pharmaceutical Care Anwar Medika 3, no. 2 (June 30, 2021): 86–98. http://dx.doi.org/10.36932/jpcam.v3i2.46.

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Diclofenac sodium is included in class II category based on biopharmaceutics classification system (BCS), sodium diclofenac has low solubility and high permeability. Low solubility will affect absorption of drugs in body because rate of dissolution will decrease. PVP K30 is inert carrier that dissolves easily in water and can affect solubility of an active drug substance. To know solid dispersion system increasing dissolution rate of sodium diclofenac by adding variations concentration of PVP K30. Solid dispersion uses solvent method with variations concentration of PVP K30 1:3, 1:5, 1:7 and 1:9. Test physical properties of solid dispersions using a moisture test and compressibility. Solid dispersion dissolution test using type 2 dissolutions test and determination of concentration using UV-VIS spectrophotometry. Test results were analyzed using One Way ANOVA and continued test. Solid dispersion has a good physical whit moisture percentage not >5% and compressibility not >20%. Solid dispersion of sodium diclofenac with addition of PVP K30 can increase dissolution rate compared to pure sodium diclofenac (p<0,05) with highest at ratio 1:7. Each comparison has significant difference (p<0,05) expect in ratio 1:9. Solid dispersion of sodium diclofenac with PVP K30 can increase dissolution rate of pure sodium diclofenac.

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17

Noval, Noval, and Rosyifa Rosyifa. "Dispersi Padat untuk Peningkatan Laju Disolusi Natrium Diklofenak dengan Variasi Konsentrasi Polivinil Pirolidon K30." Jurnal Surya Medika 6, no. 2 (February 15, 2021): 94–101. http://dx.doi.org/10.33084/jsm.v6i2.2125.

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Diclofenac sodium is included in the class II category based on the biopharmaceutics classification system (BCS), sodium diclofenac has low solubility and high permeability. Low solubility will affect the absorption of drugs in the body because the rate of dissolution will decrease. Polyvinyl Pyrrolidone (PVP) K30 is an inert carrier that dissolves easily in water and can affect the solubility of an active drug substance. To know solid dispersion system increasing dissolution rate of sodium diclofenac by adding variations concentration of PVP K30. Solid dispersion uses a solvent method with variations concentration of PVP K30 1:3, 1:5, 1:7, and 1:9. Test physical properties of solid dispersions using a moisture test and compressibility. Solid dispersion dissolution test using type 2 dissolutions test and determination of concentration using UV-VIS spectrophotometry. Test results were analyzed using One Way ANOVA and continued test. Solid dispersion has a good physical whit moisture percentage not >5% and compressibility not >20%. Solid dispersion of sodium diclofenac with the addition of PVP K30 can increase dissolution rate compared to pure sodium diclofenac (p<0,05) with the highest ratio 1:7. Each comparison has a significant difference (p<0,05) except in ratio 1:9. Solid dispersion of sodium diclofenac with PVP K30 can increase the dissolution rate of pure sodium diclofenac.

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18

Lasaga, Antonio C., and Andreas Lüttge. "A model for crystal dissolution." European Journal of Mineralogy 15, no. 4 (July 28, 2003): 603–15. http://dx.doi.org/10.1127/0935-1221/2003/0015-0603.

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19

Pawlikowski, Maciej. "Artery Biomineralization and its Dissolution." Clinical Cardiology and Cardiovascular Interventions 3, no. 4 (March 18, 2020): 01–13. http://dx.doi.org/10.31579/2641-0419/048.

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This publication presents the results of studies on biomineralization of “atherosclerotic plaque” forming in the coronary arteries of the heart. Obtained results were compared to studies of an artery unaffected by the process of atherosclerosis. Different types of artery biomineralization were marked, in terms of both mineral and chemical composition. Theories on the formation of crystallization centers where “atherosclerotic plaque” develops were also presented. Results of preliminary in vitro studies on dissolving cholesterol and phosphate mineralization in arteries were presented. The results were interpreted, and conclusions were offered.

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20

Mary M.J, Mary M. J., and Dr Shivappa R. Dr.Shivappa.R. "Judicial Dissolution of Marriage - A Study." Indian Journal of Applied Research 2, no. 3 (October 1, 2011): 171–72. http://dx.doi.org/10.15373/2249555x/dec2012/53.

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21

Bonomi, Chiara, Alexandra Alexandri, Johannes Vind, Angeliki Panagiotopoulou, Petros Tsakiridis, and Dimitrios Panias. "Scandium and Titanium Recovery from Bauxite Residue by Direct Leaching with a Brønsted Acidic Ionic Liquid." Metals 8, no. 10 (October 17, 2018): 834. http://dx.doi.org/10.3390/met8100834.

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In this study, bauxite residue was directly leached using the Brønsted acidic ionic liquid 1-ethyl-3-methylimidazolium hydrogensulfate. Stirring rate, retention time, temperature, and pulp density have been studied in detail as the parameters that affect the leaching process. Their optimized combination has shown high recovery yields of Sc, nearly 80%, and Ti (90%), almost total dissolution of Fe, while Al and Na were partially extracted in the range of 30–40%. Si and rare earth element (REEs) dissolutions were found to be negligible, whereas Ca was dissolved and reprecipitated as CaSO4. The solid residue after leaching was fully characterized, providing explanations for the destiny of REEs that remain undissolved during the leaching process. The solid residue produced after dissolution can be further treated to extract REEs, while the leachate can be subjected to metal recovery processes (i.e., liquid–liquid extraction) to extract metals and regenerate ionic liquid.

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22

Janev, Igor. "Relationalist View on the Dissolution of Former Yugoslavia and Emergent New States." Advances in Politics and Economics 3, no. 2 (May 19, 2020): p35. http://dx.doi.org/10.22158/ape.v3n2p35.

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Times After a logic-based foundation of Dialectic Relationism, as a holistic doctrine and a comprehensive systemic-dialectic methodology, in which the relations between the elements (units) constituting a system play the dominant role in its behavior, and even determine the very existence of the elements (units), we demonstrate its applicability to the political arena of international interactions of states and, in particular, to the dissolution of complex state entities and the emergence of new states. Then, we examine in more detail the processes leading to the dissolution of Former Yugoslavia and the emergence of new states following its break up. We elucidate the role of both internal and external factors in the dissolussion process and the role of international relations and environment in the political recognition of the new states. This Relationism concept provides a general framework for description and understanding of socio-political processes and regimes in individual states and international system as a whole.

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23

Viswanath, P., and Arghya Das. "Exploring chemo-mechanics of granular material using DEM." EPJ Web of Conferences 249 (2021): 14013. http://dx.doi.org/10.1051/epjconf/202124914013.

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Particle Size Distribution (PSD) is one of the prime guiding factors of granular media response. Degradation via weathering is a process, which brings about a gradual shift in the PSD. In nature, chemically sensitive material like calcite undergoes chemo-mechanical degradation bringing about variations in their behaviour. In the present study, an experimental investigation is carried out to get insight into the mechanical response during the coupled chemo-mechanical process. The experiments were carried out at two different rates of dissolutions in a custom made 1D compression mould. From the experiments, it is clear that the higher rate of dissolution reduces the lateral earth pressure more than the lower rate. Discrete Element Method (DEM) analyses the micromechanical process behind the observed response from experiments. The results showed a reduction in lateral stress as soon as the dissolution starts. DEM analysis confirms the competing mechanism between grain size reduction and grain rearrangement as the guiding element for the granular media response.

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24

Zhou, Cai Ju, Li Fang Li, Ying Liu, Shao Peng Wen, Yong En Guo, and Xiao Guang Niu. "Study on the Inclusion Complex of Rutin/Sulfobutylether-β-Cyclodextrin." Advanced Materials Research 455-456 (January 2012): 1177–81. http://dx.doi.org/10.4028/www.scientific.net/amr.455-456.1177.

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The inclusion complexes of rutin/sulfobutylether-β-cyclodextrin (SBE-β-CD) were prepared by grinding, co-precipitation and ultrasonic method and then identified with differential scanning calorimetry (DSC) and UV-visible spectrophotometry (UV). The molar ratio 1∶1 of rutin to SBE-β-CD in the complex was confirmed by phase solubility studies, and the dissolutions of rutin/SBE-β-CD were investigated by UV. The dissolution of rutin included in the complex showed significant increases in aqueous solution. The rutin/SBE-β-CD inclusion complex exhibited unique physical characteristics that are different from rutin.

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25

Acero, Patricia, Jordi Cama, and Carlos Ayora. "Kinetics of chalcopyrite dissolution at pH 3." European Journal of Mineralogy 19, no. 2 (April 26, 2007): 173–82. http://dx.doi.org/10.1127/0935-1221/2007/0019-1714.

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26

Asta, María P. Cama, and Patricia Acero. "Dissolution kinetics of marcasite at acidic pH." European Journal of Mineralogy 22, no. 1 (March 18, 2010): 49–61. http://dx.doi.org/10.1127/0935-1221/2010/0022-1981.

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27

Maslauskaitė, Aušra, and Deimantė Kuconytė. "Būti tėvu po skyrybų: tėvo kontaktai su nepilnamečiais vaikais." Culture & Society 7, no. 1 (2016): 11–32. http://dx.doi.org/10.7220/2335-8777.7.1.1.

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28

Zhang, Ronghua, Xuetong Zhang, Bernard Guy, Shumin Hu, Dominique De Ligny, and Jacques Moutte. "Experimental study of dissolution rates of hedenbergitic clinopyroxene at high temperatures: dissolution in water from 25 °C to 374 °C." European Journal of Mineralogy 25, no. 3 (September 13, 2013): 353–72. http://dx.doi.org/10.1127/0935-1221/2013/0025-2268.

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29

Moraga, Carlos, Eduardo Cerecedo-Saenz, Javier González, Pedro Robles, Francisco Raul Carrillo-Pedroza, and Norman Toro. "Comparative Study of MnO2 Dissolution from Black Copper Minerals and Manganese Nodules in an Acid Medium." Metals 11, no. 5 (May 18, 2021): 817. http://dx.doi.org/10.3390/met11050817.

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The low grade of copper deposits and the use of the froth flotation process have caused excessive tailing production. In recent years, experts have looked for new alternative methods to improve this situation. Black copper minerals are abundant resources not exploited by large-scale copper mining and possess high Mn concentrations. On the other hand, manganese nodules are submarine resources and show high concentrations of Cu, Ni, Fe, and, mainly, Mn. However, both mineral resources are refractory to conventional leaching processes, and so a reducing agent is necessary for their treatment. We studied the use of tailings obtained from the flotation of foundry slags with a high content of Fe3O4 as reducing agents at different MnO2/tailings ratios and H2SO4 concentrations. Mn dissolution was compared in marine nodule and black copper minerals samples. It was found that higher Mn dissolutions are obtained from marine nodules, likely due to the acid consumption created by Cu dissolution from black copper minerals. The remnant elements in manganese nodules were leached under an oxidant condition.

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30

McNulty, Michael Bennett. "Chemical Dissolution and Kant’s Critical Theory of Nature." Kant-Studien 109, no. 4 (December 19, 2018): 537–56. http://dx.doi.org/10.1515/kant-2018-4002.

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Abstract Kant conceives of chemical dissolutions as involving the infinite division and subsequent blending of solvent and solute. In the resulting continuous solution, every subvolume contains a uniform proportion of each reactant. Erich Adickes argues that this account stands in tension with other aspects of Kant’s Critical philosophy and his views on infinity. I argue that although careful analysis of Kant’s conception of dissolution addresses Adickes’ objections, the infinite division inherent to the process is beyond our human cognition, for Kant. Nevertheless, such infinite division may be considered as an idea of reason to make comprehensible chemical reactions, revealing reason to play a pivotal role in the foundations of chemistry.

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31

Kaide, Aya, Makoto Kanda, Hiroshi Tochigi, and Takashi Saeki. "Preparation of Magnetorheological Fluid Using Stabilizing Additives." MATEC Web of Conferences 333 (2021): 02005. http://dx.doi.org/10.1051/matecconf/202133302005.

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In this study, we examined three kinds of stabilizing additives to prepare stable MRF with good fluidity. We selected three stabilizing additives; a styrene isoprene block copolymer, a hydrophobic fumed silica, and an organogelator (CMOL SB03; PMDA-2C8/oleyl). We measured the rheological properties both for the dissolutions of the stabilizing additives in the base oil and MRFs prepared with the additives by using a rheometer; MCR302 (Anton Paar Corp.). From the experimental results, the viscosity of styrene isoprene block copolymer dissolution increased with concentration showing non-Newtonian properties. We selected a suitable concentration as 5wt% to satisfied good fluidity without forming gel. Since the viscosities of 7wt% fumed silica and 1wt% CMOL SB 03 dissolutions in the base oil consequently showed similar viscosity of the 5wt% copolymer, MRFs using such conditions were prepared. From the results of the stability test, the addition of the copolymer was effective to satisfy the stability of the MRF. We also found that the addition of such stabilizing additives were effective to increase the magnetic property of MRFs.

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Kaide, Aya, Makoto Kanda, Hiroshi Tochigi, and Takashi Saeki. "Preparation of Magnetorheological Fluid Using Stabilizing Additives." MATEC Web of Conferences 333 (2021): 02005. http://dx.doi.org/10.1051/matecconf/202133302005.

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In this study, we examined three kinds of stabilizing additives to prepare stable MRF with good fluidity. We selected three stabilizing additives; a styrene isoprene block copolymer, a hydrophobic fumed silica, and an organogelator (CMOL SB03; PMDA-2C8/oleyl). We measured the rheological properties both for the dissolutions of the stabilizing additives in the base oil and MRFs prepared with the additives by using a rheometer; MCR302 (Anton Paar Corp.). From the experimental results, the viscosity of styrene isoprene block copolymer dissolution increased with concentration showing non-Newtonian properties. We selected a suitable concentration as 5wt% to satisfied good fluidity without forming gel. Since the viscosities of 7wt% fumed silica and 1wt% CMOL SB 03 dissolutions in the base oil consequently showed similar viscosity of the 5wt% copolymer, MRFs using such conditions were prepared. From the results of the stability test, the addition of the copolymer was effective to satisfy the stability of the MRF. We also found that the addition of such stabilizing additives were effective to increase the magnetic property of MRFs.

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Carstensen, J. T., and Y. Yonezawa. "Dissolution Profiles in Column Dissolution." Journal of Pharmaceutical Sciences 75, no. 8 (August 1986): 764–68. http://dx.doi.org/10.1002/jps.2600750808.

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34

Agustine, Oly Viana. "Redesign Of Constitutional Mechanism For The Dissolution Of Political Parties: Comparative Study Of Indonesia and Germany (Redesain Mekanisme Konstitusional Pembubaran Partai Politik: Kajian Perbandingan Indonesia dan Jerman)." Negara Hukum: Membangun Hukum untuk Keadilan dan Kesejahteraan 9, no. 2 (January 2, 2019): 121–39. http://dx.doi.org/10.22212/jnh.v9i2.1009.

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Dissolution of political parties is an authority that is monopolized by the Indonesian Constitutional Court and the Federal Constitutional Court of Germany. In contrast to the dissolution of associations, political parties have an important role in determining government policies that require specifically in the constitution. The Federal Constitutional Court of Germany has until now received nine requests for the dissolution of a political party with five decisions, namely two dissolutions granted and three dismissal of a political party has been rejected. While the Indonesian Constitutional Court since its establishment has never examined the dissolution of political parties. Thus it becomes an important and interesting thing to uncover the problem of dissolution of political parties in Germany in order to find the right policy in Indonesia. Normative juridical research methods are used in this study with case studies and comparison approaches. The conclusion obtained is that the dissolution of political parties denied the right of association and assembly which is endorsed by the constitution. The German Constitutional Court has disbanded political parties proportionally by examining and deciding on the dissolution of political parties not only in text but also in the context which meet the criteria of ”clear and present danger” to the sovereignty of the German Federal Government and the free democratic basic order. Therefore, it is necessary to redesign the disruption of the dissolution of political parties in Indonesia with empirical sociological and psychological studies in order to meet the ”clear and present danger” criteria.AbstrakPembubaran partai politik merupakan kewenangan yang dimonopoli, baik oleh Mahkamah Konstitusi Indonesia maupun Mahkamah Konstitusi Federal Jerman. Pembubaran partai politik berbeda dengan pembubaran organisasi lain, dikarenakan partai politik memiliki peran yang penting dalam penentuan kebijakan pemerintah yang pembatasannya perlu diatur khusus dalam konstitusi. Mahkamah Konstitusi Federal Jerman hingga saat ini telah menerima sembilan kali permohonan pembubaran partai politik dengan lima putusan yakni dua permohonan pembubaran dikabulkan dan tiga permohonan pembubaran partai politik ditolak. Sedangkan Mahkamah Konstitusi Indonesia sejak berdiri belum pernah memeriksa pembubaran partai politik. Dengan demikian, menjadi hal penting dan menarik untuk menganalisa mekanisme pembubaran partai politik di Jerman agar dapat ditemukan mekanisme yang tepat dalam pembubaran partai politik di Indonesia. Metode penelitian yang digunakan adalah yuridis normatif dengan pendekatan studi kasus dan perbandingan. Kesimpulan yang didapat dalam penelitian ini adalah pembubaran partai politik merupakan pembatasan hak berserikat dan berkumpul yang disahkan oleh konstitusi. Mahkamah Konstitusi Jerman telah melaksanakan pembubaran partai politik secara proporsional dengan memeriksa dan memutus pembubaran partai politik tidak hanya secara teks tetapi juga konteksnya yang memenuhi kriteria “clear and present danger” terhadap kedaulatan Pemerintah Federal Jerman dan tatanan demokrasi yang bebas. Oleh karena itu, perlu dilakukan desain ulang mekanisme pembubaran partai politik di Indonesia dengan kajian sosiologis dan psikologis secara empiris agar memenuhi kriteria “clear and present danger”.

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35

Kovačević, Igor, and Božidar Šarler. "Solid-Solid Phase Transformations in Aluminium Alloys Described by a Multiphase-Field Model." Materials Science Forum 508 (March 2006): 579–84. http://dx.doi.org/10.4028/www.scientific.net/msf.508.579.

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A model for solving isothermal solid-solid phase transformations in multicomponent aluminium alloys is presented. A multiphase-field model for the dissolutions of various phases in an aluminium matrix during homogenization is presented. Driving forces for phase transformations are calculated using data obtained from the commercial software JMatPro and an aluminium database. An integrated concept of the multiphase-field model with solute diffusion is used. A onedimensional model for the simultaneous dissolution of the Mg2Si and Si phases in the aluminium matrix of ternary Al-Mg-Si alloys is introduced. An explicit central finite difference numerical scheme is used for the solution of the time transient phase-field equations and the solute diffusion equations.

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Zhu, Yinian, Huiling Xuan, Yanpeng Liang, Qiming Yan, Zongqiang Zhu, Zhangnan Jiang, Lihao Zhang, Huili Liu, and Shen Tang. "Dissolution and Solubility of the Synthetic Natroalunite and the Arsenic-Incorporated Natroalunite at pH of 2.00–5.60 and 25–45°C." Journal of Chemistry 2019 (November 3, 2019): 1–15. http://dx.doi.org/10.1155/2019/9568360.

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Arsenic is very harmful to most living organisms. The solubility data of As-containing compounds are significant in geoscience and environmental science. The arsenic-incorporated natroalunite precipitation has been proposed to eliminate arsenic from water, both for industrial practice and remediation of polluted areas. Unfortunately, only few works have been made on partial arsenic incorporation in natroalunite and the thermodynamic data for natroalunite and arsenic-incorporated natroalunite now are still lacking. Moreover, the dissolution mechanisms of arsenic-incorporated natroalunites have never been studied. In the present work, the dissolution of the synthetic natroalunite [Na0.93(H3O)0.61Al2.82(SO4)2(OH)6] and the synthetic arsenic-incorporated natroalunite [Na0.88(H3O)2.44Al2.35(AsO4)0.38(SO4)1.62(OH)6] at 25°C, 35°C, and 45°C was experimentally examined in HNO3 solution (pH of 2.00 and 4.00) and pure water. The characterizations confirmed that the solids showed no recognizable change after dissolution. All dissolutions underwent a pH variation, which was caused by a great depleting of H3O+/OH− ions, typically at the reaction beginning. The dissolution in H3O+ medium proved to be near-stoichiometric within the short beginning period, and the dissolved Na+, Al3+, SO42−, and AsO43− concentrations were stoichiometric according to the initial solids and then appeared to be nonstoichiometric with the Na/SO4 mole ratios higher and the Al/SO4 and AsO4/SO4 mole ratios lower than the stoichiometry until the experimental end, indicating that the components were released from solid to solution preferentially after the following order: Na+ (H3O+) > SO42− > AsO43− > Al3+. From the experimental results under the condition of initial pH 2.00 and 25°C, the solubility products [Ksp] and the Gibbs free energies of formation [ΔGf°] were calculated to be 10−81.02±0.33∼10−81.04±0.27 and −4713 ± 2 to −4714 ± 1 kJ/mol for the natroalunite and 10−92.30±0.30∼10−92.41±0.37 and −5078 ± 2 to −5079 ± 2 kJ/mol for the arsenic-incorporated natroalunite, respectively. The thermodynamic quantities, ΔG°, ΔH°, ΔS°, and ΔCp°, were determined to be 462303.43 J/K·mol, 122466.83 J/mol, −1140.39 J/K·mol, and 4280.13 J/K·mol for the natroalunite dissolution reaction at initial pH 2.00 and 25°C and to be 526925.48 J/K·mol, 159674.76 J/mol, −1232.38 J/K·mol, and 1061.12 J/K·mol for the dissolution of the arsenic-incorporated natroalunite at initial pH 2.00 and 25°C, respectively.

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Torres-Carrasco, M., J. G. Palomo, and F. Puertas. "Sodium silicate solutions from dissolution of glasswastes. Statistical analysis." Materiales de Construcción 64, no. 314 (March 30, 2014): e014. http://dx.doi.org/10.3989/mc.2014.05213.

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Symak, Dmytro, Jaroslaw Gumnitsky, Volodymyr Atamaniuk, and Oleg Nagurskyy. "Investigation of physical dissolution of benzoic acid polydisperse mixture." Chemistry & Chemical Technology 11, no. 4 (December 20, 2017): 469–74. http://dx.doi.org/10.23939/chcht11.04.469.

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Tsykhanovska, Iryna, Victoria Evlash, Alexandr Alexandrov, and Tatуana Gontar. "Dissolution Kinetics of Fe3O4 Nanoparticles in the Acid Media." Chemistry & Chemical Technology 13, no. 2 (June 10, 2019): 170–84. http://dx.doi.org/10.23939/chcht13.02.170.

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Adham, A. K. M., and Akira Kobayashi. "Effect of Global Warming on the Dissolution of Limestone." Journal of Rainwater Catchment Systems 15, no. 2 (2010): 1–9. http://dx.doi.org/10.7132/jrcsa.kj00006069056.

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41

Mejía Fernández, Ricardo. "¿Disolución o reconciliación transformadora de la estética en Hegel? Una respuesta." Thémata Revista de Filosofía, no. 56 (2017): 13–40. http://dx.doi.org/10.12795/themata.2017.i56.01.

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42

Franke, Walter A. "The enigma of fluorite morphology revisited by dissolution experiments." European Journal of Mineralogy 27, no. 2 (April 9, 2015): 255–62. http://dx.doi.org/10.1127/ejm/2015/0027-2435.

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Kurumathoor, Raji, and Gerhard Franz. "Etch pits on beryl as indicators of dissolution behaviour." European Journal of Mineralogy 30, no. 1 (February 1, 2018): 107–24. http://dx.doi.org/10.1127/ejm/2018/0030-2703.

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Symak, Dmytro, Vira Sabadash, Jaroslaw Gumnitsky, and Zoriana Hnativ. "Kinetic Regularities and Mathematical Modelling of Potassium Chloride Dissolution." Chemistry & Chemical Technology 15, no. 1 (February 15, 2021): 148–52. http://dx.doi.org/10.23939/chcht15.01.148.

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The dissolution process of potassium chloride particles in the apparatus with two-blade mechanical stirrer was investigated and the mass transfer coefficient was determined. The experimental results were generalized by criterion dependence. The independence of the mass transfer coefficient from the solid particles diameter was confirmed. A countercurrent process of potassium salt dissolution in two apparatuses with a mechanical stirring was considered. A mathematical model for countercurrent dissolution was developed and the efficiency of this process was determined.

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45

Ross, Margaret. "Dissolution." Iowa Review 43, no. 2 (September 2013): 173–76. http://dx.doi.org/10.17077/0021-065x.7423.

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46

Swann, B. "Dissolution." Interdisciplinary Studies in Literature and Environment 17, no. 1 (January 1, 2010): 181. http://dx.doi.org/10.1093/isle/isp134.

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47

Johnson. "Dissolution." Fourth Genre: Explorations in Nonfiction 19, no. 2 (2017): 15. http://dx.doi.org/10.14321/fourthgenre.19.2.0015.

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Garin, Marita. "Dissolution." Hudson Review 39, no. 3 (1986): 464. http://dx.doi.org/10.2307/3856772.

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Murray, Neil V., and Erik Rosenthal. "Dissolution." Journal of the ACM 40, no. 3 (July 1993): 504–35. http://dx.doi.org/10.1145/174130.174135.

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Das, Hirak Jyoti. "National Assembly Elections in Kuwait, 2016." Contemporary Review of the Middle East 4, no. 2 (May 29, 2017): 193–210. http://dx.doi.org/10.1177/2347798917694758.

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Among the Gulf Cooperation Council (GCC) countries, Kuwait not only has the oldest constitution but also has a vibrant parliament. Kuwait has sent elected representatives to the National Assembly since 1963 that shares the legislative responsibilities with the Amir. In the last decade Kuwait National Assembly has confronted the government on various issues, especially on corruption charges and incompetence of individual ministers. It has led to frequent disruptions and dissolution of the assembly five times since 2003. The 2016 elections has returned a large number of deputies with inclination to traditional opposition and though it bodes well for democratization in the oil-rich Gulf state, it raises questions about going back to the era of disruptions and dissolutions seen during 2008–2012.

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