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Mar 26, 2019 · Stir bars – it was the stirring bars all along. That's the take-home from this paper, which shows definitively that (A) you cannot truly clean one of the things and that (B) the stuff that's stuck to them can be influencing the next reaction they're used in.At one level, I think that few organic chemists will be surprised that the Teflon-coating little thingies can be contaminated.
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Jun 26, 2014 · Under correct culture conditions, the growth rate of most cells on Cytodex 1 is comparable to that achieved on plastic or glass culture surfaces (Figure 14). 10 0 2 00 300 Hours 0.25 1.0 4.0 16.0 Cells/mLx10 5 Monolayer Cytodex Fig. 14.
The solution was then heated to 110 °C in a microwave reactor (Anton Paar Monowave 300) under a stirring rate of 1,200 r.p.m. min −1 and held at that temperature for 60 min, and then cooled to room temperature. The as-prepared Pd NPs are used for spectroscopic measurement.
Jul 17, 2008 · A solid state membrane for a reforming reactor is disclosed which comprises at least one oxygen anion-conducting oxide selected from the group consisting of hexaaluminates, cerates, perovskites, and o
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Continuous-flow reactors for carbon mass balance analysis. Cellulose filter paper (Whatman no. 1, with a minimum of 98% alpha-cellulose) was packed into reactors consisting of 5-ml, glass crimp-seal vials (VWR, ON, Canada) fitted with rubber stoppers (Bellco Glass Inc., NJ) .
In this work, we took the approach of measuring precipitation in both native 8-nm nanoporous amorphous silica (Controlled Pore Glass-75, or CPG-75), and CPG modified with a self-assembled monolayer containing an anhydride group, which presumably hydrolyzes in water to form a dicarboxylic acid.
Slide the glass heater coil around the reactor (part A, Figure 1B). Wrap a glass slide with polytetrafluoroethylene (PTFE) thread seal tape. Push the glass slide approximately 10 cm from the right side of the reactor, part A.
The liquid backflow, f 1 (m 3 s -1), data could be correlated with an average relative deviation of 17.2% by: f L = f Lentr + xf Lma with x = (1 - ε G) 3;f Lma = o.o7η L d I/ρ L (ρ LN d I2) 0 .
May 10, 2018 · 1. A multilayer cast film oriented in machine direction, the multilayer cast film comprises at least three layers A, B and C, wherein a) layer A is an outer layer comprising a heterophasic propylene copolymer, b) layer B is a core layer comprising a high isotacticity polypropylene homopolymer, and c) layer C is a sealing layer comprising a propylene based random copolymer or terpolymer .
Ceric sulfate slurries were regenerated electrochemically from cerous sulfate slurries in 1.6 molar sulfuric acid using a labsize tube and wire electrochemical cell. The cell consisted of a platinised titanium tube as the anode and a tungsten wire as the cathode. The reactor was run in a batchwise fashion. The anode to cathode area ratio was eleven. The dissolved ceric sulfate concentration .
This dissertation investigates the reactions of conjugated olefins that lead to catalyst deactivation and fouling in naphtha hydrotreater reactors using a commercial Ni-Mo-S/γ-Al₂O₃ catalyst. The reactions were performed in a micro-scale fixed bed reactor system operated at 150-250°C, 3-4 MPa H₂, LHSV of 1-8 hr-¹ and a H₂/feed ratio of 392-1200 standard mL/mL. During isoprene .
A plasma reactor equipped with a rotating vacuum chamber and internal glass wings is used to keep the granular materials homogeneously stirred and to modify the surface of both graphite slabs and .
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Sociology of Architecture is the sociological study of the built environment and the role and occupation of architects in modern societies. Related Journals of Sociiology of Architecture: Human architecture, The Sociology of Architecture and the Politics of Building:The Discursive Construction of Ground Zero, sociology of architecture journal, Journal of urban design, Architecture and Interior .
In a different approach, PdNP were immobilized onto an opencell macroporous (10 μm pore size), polymeric borate monolith, that was grown in situ within the walls of a commercial, tubular glass .
Microflow technology, i.e., the use of microfluidic devices for continuous flow synthesis, represents a highly useful and increasingly popular method in organic chemistry. Recently, also an increasing number of polymer synthesis protocols attain benefit from this technique. In particular, the control of highly exothermic, fast polymerization reactions can be improved due to the excellent heat .
The reactor was loaded with 150–300 mg of Pd–SiO 2, which was held between plugs of glass wool (6–10 mg), each supported by borosilicate glass rods (2 mm diameter). These, in turn, were secured between silver-coated fritted VCR gaskets (Swagelok, SS-4-VCR-2-60M), which were also used to seal the reactor to the tubing of the gas–liquid .
More importantly, the quantum efficiency in microchannel monolith reactor was much higher (0.10%) than that of the cell type reactor (0.0005%) and previously reported internally illuminated monolith reactor (0.012%). The significantly improved quantum efficiency indicated photon energy was efficiently utilized in the microchannel monolith reactor.
Reactors are defined by a real or imaginary boundary that physically confines the processes. Lakes, segments of a river, and settling tanks in treatment plants are examples of reactors. Most, but not all, reactors experience continuous flow (in and out). Some reactors, experience flow (input and output) only once. These are called "batch" reactors.
The expanded-bed GAC reactor consists of a 96.5 cm Plexiglas tube with an internal diameter of 10.2 cm and an influent and effluent header. The reactor volume is 10 L including the recycle loop. Two of these reactors have been operated for over 40 months to .
The solution was then heated to 200 °C in a microwave reactor (Anton Paar Monowave 300) under a stirring rate of 1200, r.p.m. min −1 and held at that temperature for 5 min and then cooled to room temperature. The as-prepared Pt nanoparticles were precipitated with 45 ml of acetone and re-dispersed in 10 ml of ethylene glycol to remove excess .
Aug 19, 2019 · The combination of nanosized bioactive glass (NBG) particles and biopolymers leads to nanocomposites exhibiting osteoconductive, osteogenic, antibacterial, and angiogenic properties, which are required characteristics for bone tissue engineering. In this review, the fabrication techniques for polymer/NBG nanocomposites such as nanofibers, 3D scaffolds, microbeads, hydrogels are discused.
FIELD: chemistry. SUBSTANCE: invention can be used in chemical industry to prepare a composition of polycarboxylic acids. A bubble column reactor 600 has an external reaction vessel and an internal structure 602 which lies at least partly inside the external reaction vessel.
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Reactors designed for convenient operation at moderate pressure and/or for corrosion resistance. Convenient and Easy Sealing with O-rings and Split Ring Closures. Parr has developed a new O-ring and closure system to accommodate the requirements of this unique glass-to-metal seal and support, which is convenient to use. A face seal-type O-ring .
Combining microfluidics and FT-IR spectroscopy: towards spatially resolved information on chemical processes. Adeline Perro * a, Gwenaelle Lebourdon a, Sarah Henry b, Sophie Lecomte b, Laurent Servant a and Marre * c a Institut des Sciences Moléculaires, Université de Bordeaux—CNRS, 351 cours de la libération, 33405 Talence, France.
US20140033779A1 US13/984,471 US201213984471A US2014033779A1 US 20140033779 A1 US20140033779 A1 US 20140033779A1 US 201213984471 A US201213984471 A US 201213984471A US 2014033779 A1 US2014033779 A1 US 2014033779A1 Authority US United States Prior art keywords substrate coating coated reactor method Prior art date 2011-02-09 Legal status (The legal status is .
After the reactor is warmed to 45°C, 45.86 g of IPDI are added through an addition funnel over 10 minutes to the reactor under moderate stirring. The reaction is kept for 2 hours at 60°C. 630 g of KF-6002 dissolved in 452 g of distilled MEK are then added and stirred until a homogeneous solution is formed. 0.235 g of DBTDL are added, and the .