2,577 research outputs found
Sol Satinsky memorial scrapbook 1966
No full textConsists of a scrapbook filled with newspaper clippings relating to Satinsky, who was a director and president of the Jewish Exponent in Philadelphia. Satinskly also served as past President of the Allied Jewish Appeal, Vice President of the Federation of Jewish Agencies, President of the Jewish Publication Society of America, Founder of Friends of Lubavitch in Philadelphia, and active in Dropsie College and the Joint Distribution Committe
Personal Papers (MS 80-0002)
No full textLetter from Sol Satinsky to Isaac H. Kempner thanking for the letter regarding the nomination of the American Jewish Board
Personal Papers (MS 80-0002)
No full textLetter from Sol Satinsky to Arthur Alpert discussing Mr. Alpert's nomination to the National Council of the Joint Distribution Committee
The Development of Nanostructured TiO2 Sol-Gel Derived Coatings – the Influence of Substrate Preparation Method and Post Treatment of Coatings
No full textThe analysis of literature data and experimental results obtained by the Author of the report clearly showed that further researches shall be devoted to the surface preparation method and characterization of the substrate obtained to check the dependency of morphological features whether they are characteristics of sol or substrates
Sol Grossbard papers 1919
No full textA typescript written while serving in the Signal Corps with the U.S. Expeditionary Forces in Siberia, 1918-1919. It is a critique of the attitudes and policies of the Allies towards Russia and its various political groups which led to the Allies' intervention in Siberia in 1918, and how these shared Russian attitudes toward each of the Allies and contributed to the final outcome of the Allies' venture in Russia. The author also presents his views as to what steps the U.S. should have taken to have enabled a stable democratic Russian government to have evolve
Scrutinizing the importance of surface chemistry versus surface roughness for aluminium / sol-gel film adhesion
No full textThe sol-gel synthesis process is a versatile method used to produce a wide diversity of materials and is being increasingly used as a surface modification method to alter porosity, wettability, catalytic activity, biocompatibility and corrosion performance of underlying substrates. Silane sol–gel films deposited on aluminium and aluminium alloys have been widely studied as chemical conversion coatings and as coupling agent between the substrate and organic layers. This study set out to investigate the effect of the surface chemical treatment prior to sol-gel application on the interfacial adhesion properties of a hybrid sol-gel film. Different surface pre-treatments, including two abrasive treatments and three chemical surface pre-treatments were used and their effect on surface chemistry and surface roughness was assessed. Surfaces were characterized by scanning electron microscopy, x-ray photoelectron spectroscopy, roughness measurements and static contact angles. Cerium nitrate loaded hybrid sol-gel films were deposited and adhesion on commercially pure aluminium was evaluated using pull-off testing. Statistical analysis revealed that, although highest adhesion values were obtained on rougher surfaces, the strongest correlation exists between the surface hydroxyl fraction and adhesion strength.Team Arjan MolTeam Yaiza Gonzalez Garci
From past research experiences looking to the future of sol–gel
No full textAbstract: Based on the outline of the conference that the author held in St. Petersburg for the conferment of the Life Achievement Award, some important steps in the evolution of science and sol–gel technology are revisited through examples taken from his research experiences. The goal is to reconsider what has been done in the past in light of what has been learned in the meantime. Some topics are still current and probably deserve further and more in-depth research, and new ideas for future work may be suggested. Driven by the interest of finding new materials and new fields of application, the sol–gel has evolved from the first studies on simple glass and glass–ceramic systems, to more sophisticated and complex organic–inorganic systems, multifunctional materials, and nanocomposites. [Figure not available: see fulltext.]
Sol–gel one-pot synthesis in soft conditions of mesoporous silica materials ready for drug delivery system
No full textThe present work reveals a new and simple strategy, a one-step sol–gel procedure, to encapsulate a low water-soluble drug in silica mesostructured microparticles and to improve its release in physiological media. The synthesis of these new materials is based on the efficient solubilisation of a poorly water-soluble drug in surfactant micelles (Tween 80, a pharmaceutical excipient) which act as template for the silica network. A strict control of the sol–gel process and the parameters procedure in soft conditions (concentration, pH, temperature) was applied to reach the solubilisation limit of the drug in the micellar solution so as to optimise its encapsulation. Even if this one-pot procedure could appear limited by the low drug loading, it could provide an interesting alternative for the formulation of many recent highly active but very poorly soluble drugs.Nanostructured MaterialsApplied Science
El Sol 4-Ollin de los aztecas
No full textDe acuerdo con Hans Ludendorff (1930), el Tzolkin/Tonalpohualli de 260 días es un ciclo creado para la previsión de eclipses debido a su congruencia con el periodo de paso del Sol por los nodos de la órbita lunar, cada 173.333 días. Esta congruencia divide el ciclo de 260 días en tres partes iguales: 87, 87 y 86 días. Debido a que la duración real del pasaje del Sol por los nodos de la órbita lunar es ligeramente inferior a una tercera parte de un doble tzolkin, i.e. 173.1 en lugar de 173.3 las conjunciones del Sol y los nodos de la órbita lunar regresan un día cada veinte Tun, por lo que una regresión completa en el almanaque de 260 días toma 260 x 20 = 5,200 Tun. Ludendorff asevera que la duración de la Cuenta Larga es el ciclo de corrección del Tzolkin/Tonalpohuali para el cálculo de los eclipses a largo plazo. Las tres zonas de eclipses en el almanaque de 260 días son de 35 días cada una, las restantes son de 52 días cada una y están libres de eclipses. Por lo anterior, cualquier día del Tzolkin que sale de una zona de eclipses estará libre de la ocurrencia de estos durante 1,040 años, hasta que entra en la siguiente zona de eclipses, localizada 52 días después en el almanaque (20 x 52 = 1 ,040). Los nombres de los cinco Soles de la cosmología azteca están ordenados de tal manera que muestran una sucesión lógica de cinco periodos de 1,040 años cada uno. Cada vez que el nombre del día que denomina un Sol entra a una zona de eclipses el siguiente nombre entra a una nueva época de 1,040 años libre de ellos. El inicio del primer Sol toma lugar en el año 3119 a.C., que es el mismo año que inicia la Tabla de Venus en el códice de Dresde; todas las fechas están en conformidad con años bien documentados de la ceremonia del Fuego Nuevo. Esto es lo que se expone en este artículo, con algunos detalles complementarios
El Tlacuache Núm. 915 (2020). 915 Año 19 (2019) enero. El Tlacuache
No full textUna promesa a San Miguel, a través del juego de La Mulita en Alpuyeca por José Cuauhtli Alejandro Medina Romera, Jairo Macedonio Flores, Karen Abigayl Yáñez Rodríguez y Alfredo Balam Castro Zamora
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