• However, material silica gel removes moisture by adsorption onto the surface of its numerous pores rather than by absorption into the bulk of the gel. (wikipedia.org)
  • The gel was washed with distillated water, and dried in an oven at 100 o C. Characterization of silica gel was carried out by determination of acidity, water adsorption capacity, and water content. (ugm.ac.id)
  • The increase of acid concentration caused water content, water adsorption capacity, and acidity of the silica gel resulted with HCl and citric acid tended to be increased, increased, and increased, but with H 2 SO 4 to be decreased, increased, and decreased, respectively. (ugm.ac.id)
  • This paper devoted to evaluate the surface behavior in term of adsorption and desorption of tartrazine and rhodamin on silica-cellulose thin layer in different mobile phase. (ub.ac.id)
  • Small paper envelopes containing silica xerogel pellets, usually with a "do not eat" warning, are often included in dry food packages to absorb any humidity that might cause spoilage of the food. (wikipedia.org)
  • In this research, synthesis and characterization of silica gel from sodium silicate through sol-gel process using H 2 SO 4 , HCl, and citric acid have been investigated. (ugm.ac.id)
  • Synthesis was carried out by mixing and stirring 20 mL of H 2 SO 4 , HCl or citric acid at certain concentration with 50 mL of sodium silicate solution (Na 2 O 0.17 M and SiO 2 0.61 M) for one hour and let to form gel. (ugm.ac.id)
  • However, its synthesis has not been extensively studied and highly variable yields of this ligand - ranging from 30-90% - have been reported in the literature, with a purification by silica gel column chromatography generally required. (thieme.de)
  • In this study, we explored the catalyst‐free one‐pot multi‐component synthesis of 1,4‐dihydropyridine derivatives by following green chemistry protocol. (researchgate.net)
  • Moreover, synthesis of gel silica by a sol-gel method is preferred due to the homogeneity and surface feature easily controlled. (ub.ac.id)
  • Silica gel's high specific surface area (around 750-800 m2/g (230,000-240,000 sq ft/oz)) allows it to adsorb water readily, making it useful as a desiccant (drying agent). (wikipedia.org)
  • For solid-state chemistry to take place, however, you need a surface and this is where dust takes centre stage. (chemistryworld.com)
  • In addition, various surface functionalized mesoporous materials with tunable meso-channels can be deliberately designed to tune its proton conductivity by sol-gel chemistry. (imec-int.com)
  • High surface area mesoporous sol-gel materials with tailored surface functional groups have gained immense interest in the scientific community. (imec-int.com)
  • Here at IMEC, we have the expertise of synthesizing mesoporous silica thin films via sol-gel (electro)chemistry and surface functionalization via self-assembled monolayers (SAMs). (imec-int.com)
  • The retardation factors (R f ) of the mixtures suggest complexity behavior on silica-cellulose surface. (ub.ac.id)
  • Silica alumina gel - light yellow, chemically stable, flame-resistant, insoluble except in alkali or hydrofluoric acid. (wikipedia.org)
  • It was a time when hardly any chemical related to silica and alumina chemistry was produced in India and most of it was imported. (indiacatalog.com)
  • Combination of strongly acidic cation exchanger (SA) based on silica gel with benzenesulfonic acid modification for removal of ionic compounds and unmodified silica (SiOH) for removal of polar compounds. (mn-net.com)
  • Silica gel is an amorphous and porous form of silicon dioxide (silica), consisting of an irregular tridimensional framework of alternating silicon and oxygen atoms with nanometer-scale voids and pores. (wikipedia.org)
  • Stabilizing silica gel - non-crystalline micro-porous solid powder, nontoxic, flame-resisting, used in brewery of grains for beer to improve taste, clearness, color, and foam and for removal of non-micro-organism impurities. (wikipedia.org)
  • contains a nano-porous silica micro-structure, suspended inside a liquid. (ostatic.com)
  • 7] Y. Chevalier, A.C. Grillet, M.I. Rahmi, C.L., M. Masure, P. Hemery and F. Babonneau: "The structure of porous silica-polysiloxane hybrid materials", Mat. (edu.pl)
  • 9] H. Fan, S. Reed, T. Baer, R. Schung, G.P. Lopez and C.J. Brinker: "Hierarchicaly structured functional porous silica and composite produced by evaporation-induced self assembly", Micropor. (edu.pl)
  • Based on the IR spectra and XRD data, it could concluded that the synthetic silica gels contained silanol (Si-OH) and siloxane (Si-O-Si) and were amorphous, showing similar pattern to kieselgel G 60 produced by Merck. (ugm.ac.id)
  • The amorphous silica was verified by the absence of sharp peaks and the presence of a broad peak at a 2 angle of 23.8 for the XRD analysis structure in the produced NPs. (riverpublishers.com)
  • Additionally dried and screened, it forms macro-pored silica gel which is used as drier, adsorbent and catalyst carrier. (wikipedia.org)
  • Canada-based SiliCycle, a fine chemistry company specialising in silica-based products, is to sell Belgium-based Umicore\'s precious metal-based homogenous catalysts to the North American life science industry. (manufacturingchemist.com)
  • In addition to SiliCycle's metal scavenging agents, heterogeneous catalysts and functionalised silica gels, customers will have access to Umicore's catalysts for chiral chemistry, metathesis applications for C-X coupling reactions and many more applications. (manufacturingchemist.com)
  • Up to now, various mild methods for acetalization and deacetalization have been developed to spare other acid-sensitive functionality, such as the use of catalysts such as ammonium nitrate, Amberlyst-15 or silica gel, and dehydrating agents such as P 2 O 5 . (organic-chemistry.org)
  • Early assays based on conventional designs that required postamplification product processing (e.g., gel electrophoresis), were time-consuming and prone to false-positive results from amplicon contamination. (cdc.gov)
  • A real-time reverse transcription-polymerase chain (e.g., gel electrophoresis), were time-consuming, and were reaction (RT-PCR) assay was developed to rapidly detect prone to false-positive results from amplicon contamina- the severe acute respiratory syndrome-associated coron- tion. (cdc.gov)
  • Bee Chems found an unmet need of making nano silica for Indian investment casting foundries and thus became the first Indian company to manufacture nano silica that too without any technical support of any kind. (indiacatalog.com)
  • Nano silica (SiO2) has an extensive range of products from manufacturing to scientific. (riverpublishers.com)
  • When a visible indication of the moisture content of the silica gel is required, ammonium tetrachlorocobaltate(II) (NH4)2[CoCl4] or cobalt(II) chloride CoCl2 is added. (wikipedia.org)
  • Due to its ultra-low density, the gel was able to capture these high-speed particles like a fly in a spider's web, without damaging their internal structure. (chemistryworld.com)
  • The synthetic route for producing silica gel was patented in 1918 by Walter A. Patrick, a chemistry professor at Johns Hopkins University. (wikipedia.org)
  • In World War II, silica gel was indispensable in the war effort for keeping penicillin dry, protecting military equipment from moisture damage,[citation needed] as a fluid cracking catalyst for the production of high octane gasoline, making carbon disulfide, and as a catalyst support for the manufacture of butadiene from ethanol (feedstock for synthetic rubber production). (wikipedia.org)
  • Fluorosulfates and sulfamoyl fluorides have applications ranging from chemical biology to polymer chemistry in addition to being valuable synthetic precursors to diaryl sulfates, sulfamides and sulfamates. (sigmaaldrich.com)
  • 2] C.J. Brinker and Scherer, G.W., 1990, Sol-Gel Science: The Physics and Chemistry of Sol-Gel Processing , Academic Press Inc., New York. (ugm.ac.id)
  • abstract = "Amine double-functionalized adsorbents were fabricated using silica gel as supports and their capabilities for CO2 capture were examined. (korea.ac.kr)
  • The individual contaminants analyzed as part of the PAT program include metals, silica (14808607), asbestos (1332214) fibers, and organic solvent s. (cdc.gov)
  • Occasionally, on the DAT Organic Chemistry section, you'll be asked about one of the chemical lab tests you likely used in your lab sections to identify the functional groups in a molecule. (bootcamp.com)
  • In this work we present experimental results about the formation, properties and structure of sol - gel silica based biocomposite containing Calcium alginate as an organic compound. (edu.pl)
  • 5] R. Ceccato, S. Dire and L. Lutterotti: "Pyrolysis pathway of sol-gel derived organic/inorganic hybrid nanocomposites", J. Non-Crystalline Solids, Vol. 322, (2003), pp. 22-28. (edu.pl)
  • PAT Round 125 was mailed out on April 1, 1996 and contained the organic solvent methanol (67561) on silica-gel tubes. (cdc.gov)
  • Wet' silica gel, as may be freshly prepared from alkali silicate solutions, may vary in consistency from a soft transparent gel, similar to gelatin or agar, to a hard solid, namely a water-logged xerogel. (wikipedia.org)
  • it is more solid than common household gels like gelatine or agar. (ostatic.com)
  • Results showed that at a range of investigated concentration (0.6 - 3.0 M) the increase of concentration, formation of gel with H 2 SO 4 tended to be faster, but with HCl and citric acid to be slower. (ugm.ac.id)
  • In interstellar space, these dusty clouds of gas slowly come together under high pressure and low temperatures to kickstart the star formation process through chemistry. (chemistryworld.com)
  • In the last case, the material is properly called silica xerogel. (wikipedia.org)
  • Silica xerogel with an average pore size of 2.4 nanometers has a strong affinity for water molecules and is widely used as a desiccant. (wikipedia.org)
  • A new system capable of automatically turning words into molecules on demand will open up the digitisation of chemistry, scientists say. (phys.org)
  • Researchers from the University of Glasgow's School of Chemistry, who developed the system, claim it will lead to the creation of a "Spotify for chemistry"-a vast online repository of downloadable recipes for important molecules including drugs. (phys.org)
  • With so few molecules in any given volume of space, Fraser believes it raises a question that sums up the whole field: how does chemistry happen if there aren't many atoms or molecules around? (chemistryworld.com)
  • In a new paper published in the journal Science , the Glasgow researchers describe a universal approach to digitizing chemistry , including a programming system which could remove the vast majority of the effort required to program the robots. (phys.org)
  • in Arabian Journal of Chemistry Elsevier. (ac.rs)
  • The Glasgow team, led by Professor Lee Cronin, have laid the groundwork for digital chemistry with the development of what they call a " chemical processing unit"-an affordable desktop-sized robot chemist which is capable of doing the repetitive and time-consuming work of creating chemicals. (phys.org)
  • Professor Lee Cronin, Regius Professor of Chemistry at the University of Glasgow, said: "What we've managed to do with the development of our 'Chemical Spotify' is something similar to ripping a compact disc into an MP3. (phys.org)
  • All these kinds of weird and wonderful processes are very much formed in gas-phase chemistry. (chemistryworld.com)
  • The newly obtained sorbent, based on silica gel modified with polyaniline, was successfully used as a solid phase in SPE technique to remove the undesirable matrix effect. (pjoes.com)
  • Most applications of silica gel require it to be dried, in which case it is called silica xerogel. (ostatic.com)
  • I am an archaeologist and am currently using moisture-indicating silica gel (orange) to dry out some metal finds from our excavations. (stackexchange.com)
  • This will cause the gel to be blue when dry and pink when hydrated. (wikipedia.org)