https://www.bibsonomy.org/BibSonomy RSS feed for /2025-01-17T03:35:17+01:00https://www.bibsonomy.org/bibtex/299396ba462b3ac84a03edae971ea55df/gdmcbaingdmcbain2025-01-17T02:36:22+01:0082b26-phase-transitions <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Wei-Youh Kuu" itemprop="url" href="/person/12b69e89568c6e8512197e368363a9b9f/author/0"><span itemprop="name">W. Kuu</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Rao Chilamkurti" itemprop="url" href="/person/12b69e89568c6e8512197e368363a9b9f/author/1"><span itemprop="name">R. Chilamkurti</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Chi Chen" itemprop="url" href="/person/12b69e89568c6e8512197e368363a9b9f/author/2"><span itemprop="name">C. Chen</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">International Journal of Pharmaceutics</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">166 </span></span>(<span itemprop="issueNumber">2</span>): <span itemprop="pagination">167-175</span></em> </span>(<em><span>May 1998<meta content="May 1998" itemprop="datePublished"/></span></em>)</span>Fri Jan 17 02:36:22 CET 2025International Journal of Pharmaceuticsmay2167-175Effect of relative humidity and temperature on moisture sorption and stability of sodium bicarbonate powder166199882b26-phase-transitions The effects of relative humidity and temperature on moisture sorption rate and stability profile of sodium bicarbonate powder exposed to various storage conditions were investigated using gravimetrical and acid-titration methods. In the study, samples were placed in desiccators, which contained various saturated salt solutions to generate desired levels of relative humidity, denoted as RH, ranging from 30–93% RH. The weight of each sample was determined periodically. The results show that both the temperature and relative humidity are key factors in moisture sorption isotherm and decomposition kinetics. The threshold relative humidity RHth is defined as the relative humidity above which sodium bicarbonate powder starts to rapidly gain weight. The critical relative humidity RHc is defined as the relative humidity above which sodium bicarbonate powder either starts to rapidly gain weight or starts to rapidly hydrolyze (resulting in losing weight). The moisture sorption isotherm shows an unusual phenomenon at high RH, where the weight of the sodium bicarbonate powder either increases or decreases with time, depending on the storage temperature. When the powder is exposed to a lower temperature and high humidity level (e.g. at 25°C and 93% RH), the weight increases rapidly, due to the fact that the relative humidity exceeds the RHth at this temperature. On the other hand, when the powder is exposed to higher temperature and high humidity levels (e.g. at 40°C, 89% RH and at 55oC, 82% RH), the weight of the powder decreases with time since the relative humidity is below the RHth at these temperature levels and the decomposition rate is higher than the moisture sorption rate. The decomposition of sodium bicarbonate results in the release of carbon dioxide. The values of RHc at 25 and 40°C were determined to be between 76 and 88% RH and between 48 and 75% RH, respectively. The accurate moisture content and the stability profiles of sodium bicarbonate were determined using a titration-drying-titration procedure. The results of determination show that sodium bicarbonate powder is stable below 76% RH at 25°C and below 48% RH at 40°C, respectively.https://www.bibsonomy.org/bibtex/2534e2dcc3254a66011e85b3ddf64e21b/gdmcbaingdmcbain2025-01-17T02:18:59+01:0001a60-20th-century 91f10-history-political-science <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Shirley Hazzard" itemprop="url" href="/person/14ec3d7530d8e154d0ef141e5132173da/author/0"><span itemprop="name">S. Hazzard</span></a></span></span>. </span><span class="additional-entrytype-information"><em><span itemprop="publisher">Little, Brown</span>, </em><em>Boston, Massachusetts, </em>(<em><span>1973<meta content="1973" itemprop="datePublished"/></span></em>)</span>Fri Jan 17 02:18:59 CET 2025Boston, MassachusettsDefeat of an ideal; a study of the self-destruction of the United Nations197301a60-20th-century 91f10-history-political-science https://www.bibsonomy.org/bibtex/26609416a5a02d824f111272195ebdcd2/gdmcbaingdmcbain2025-01-17T01:22:30+01:0082b26-phase-transitions 82d15-liquids <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="M. Sarbar" itemprop="url" href="/person/172d76313894433332dae8d77177e30f4/author/0"><span itemprop="name">M. Sarbar</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="A.K Covington" itemprop="url" href="/person/172d76313894433332dae8d77177e30f4/author/1"><span itemprop="name">A. Covington</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="R.L Nuttall" itemprop="url" href="/person/172d76313894433332dae8d77177e30f4/author/2"><span itemprop="name">R. Nuttall</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="R.N Goldberg" itemprop="url" href="/person/172d76313894433332dae8d77177e30f4/author/3"><span itemprop="name">R. Goldberg</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">The Journal of Chemical Thermodynamics</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">14 </span></span>(<span itemprop="issueNumber">10</span>): <span itemprop="pagination">967--976</span></em> </span>(<em><span>1982<meta content="1982" itemprop="datePublished"/></span></em>)</span>Fri Jan 17 01:22:30 CET 2025The Journal of Chemical Thermodynamics10967--976The activity and osmotic coefficients of aqueous sodium bicarbonate solutions14198282b26-phase-transitions 82d15-liquids We have used the isopiestic technique to measure the osmotic coefficients of mixed aqueous solutions of NaHCO3 and Na2CO3 at 298.15 K. During the isopiestic equilibration, the systems were pressurized with CO2(g) to reduce the loss of CO2 from the initially pure NaHCO3 solutions and the consequent conversion of bicarbonate to carbonate. Following equilibration, a differential titration analysis was performed to determine the amounts of carbonate and bicarbonate in the solutions. We have calculated the osmotic and the activity coefficients of pure sodium bicarbonate solutions up to a molality of 1.3 mol · kg−1, using the experimentally determined osmotic coefficients for the mixtures, the osmotic coefficients for pure sodium carbonate solutions, and the equations of Reilly, Wood, and Robinson together with the assumption that the interaction coefficients are zero.https://www.bibsonomy.org/bibtex/2a87a2440c745d828a142545e29488fc7/gdmcbaingdmcbain2025-01-17T00:02:37+01:0076t10-liquid-gas-two-phase-flows-bubbly-flows <meta content="thesis" itemprop="educationalUse"/><span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Prakash Rapolu" itemprop="url" href="/person/138b6fce25710bdc502dac7f45d6d5fca/author/0"><span itemprop="name">P. Rapolu</span></a></span></span>. </span><span class="additional-entrytype-information"><em>Department of Mechanical, Industrial and Nuclear Engineering of the College of Engineering, </em><em><span itemprop="educationalUse">Master&#039;s thesis</span>, </em>(<em><span>October 2007<meta content="October 2007" itemprop="datePublished"/></span></em>)</span>Fri Jan 17 00:02:37 CET 2025octCapillarity effect on two-phase flow resistance in microchannelsMaster's thesis200776t10-liquid-gas-two-phase-flows-bubbly-flows Two-phase flow plays a major role in number of technologies used in fuel cells, bioreactors, phase and particle separators, thermal management systems, chemical reactors, etc. Some of these applications involve air–water two-phase flow in channels much less than 1 mm in diameter. The fundamental understanding of flow characteristics, such as flow regime, pressure drop, and heat transfer, is essential in the design and control of these devices. In this work, an experimental set-up is developed to investigate the effects of surface energy/surface wettability and geometry on characteristics of two-phase flow in horizontal microchannels at adiabatic conditions. Two-phase (air-water) slug flow is established in microchannel test sections of varying sol-gel dip coated surface wettabilities. Pressure drop measurements and flow pattern detection by high speed visualization are employed to characterize the flow. Results indicate that two-phase flow resistance is a strong function of surface wettability and it increases with static contact angle. Significant change in contact line in advancing and receding interface, and thus increase in flow resistance, is observed with increase of hydrophobicity while geometry of the channels influences the frequency of the slugs. Presence of thin liquid film, whose thickness is a strong function of wettability, is observed experimentally which clearly elucidates the pressure drop variation with surface wettability. Hence for characterizing two-phase flow in microchannels surface wettability parameters should be accounted appropriately. https://www.bibsonomy.org/bibtex/26116e93e9c645d85cae2c197735d8968/gdmcbaingdmcbain2025-01-16T22:08:02+01:0001a70-biographies-obituaries-personalia-bibliographies Cinéma <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Le Monde avec AFP" itemprop="url" href="/person/11ce6d5e2692ff19996f045bd81e0fd29/author/0"><span itemprop="name">L. avec AFP</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Le Monde</span>, </em> </span>(<em><span>January 2025<meta content="January 2025" itemprop="datePublished"/></span></em>)</span>Thu Jan 16 22:08:02 CET 2025Le Monde jan1David Lynch, réalisateur de « Mulholland Drive » et d’« Elephant Man », est mort à l’âge de 78 ans202501a70-biographies-obituaries-personalia-bibliographies Cinéma