Green and eco-friendly mica/Fe3O4 as an efficient nanocatalyst for the multicomponent synthesis of 2-amino-4H-chromene derivatives Ali Maleki, Zoleikha Hajizadeh and Kobra Valadi Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran, Iran

alternatively dry-ground in a vibrating cup mill (Pulverisette 9, Fritsch) to produce particle size distributions with different d50 values. These particle size distributions were assessed by laser diffraction (Mastersize, 2000E). Chemical analysis (ICP-OES, Spec-tro) was also performed on all limestone samples to determine their nature.

vibrating mill, ESM (SIEBTECHNIK, M€uhlheim/Ruhr, Germany) for 4 h. The sample produced in this way was labeled ESMRT. This synthesis corresponds to the "Celite-ment" process and contains CHSH as the cementitious component. (3) Finally, the ground product was heated at 300°C, 320°C, 340°C, 360°C, 380°C, 400°C, 420°C, 440°C,

May 08, 2019· Pulverized the sample and 1g of sample is taken To this add one or two drops of liquid paraffin Mix to distribute a sample in liquid paraffin Apply the Paste to Liquid cell Measure with IR Note : Since liquid paraffin exhibit spectra 3000,2800, 1460, 1375, 730 cm-1 Nujol Method 28 Department of Pharmaceutics, KCP, CBE-32 29.

Excellent sample preparation is the foundation of high quality analytical results. For over 65 years SPEX® SamplePrep has been the leading sample preparation solutions provider to analytical scientists worldwide. Our range of high performance and easy to use mill, grinders, homogenizers, presses and fusion fluxers are used for a wide range of analytical techniques including AA, ICP, GC/MS ...

2.2. Sample Preparation for Terahertz Spectroscopy. Regard-ing the THz spectroscopy analysis, the sample preparation required grinding, sieving, and tablet pressing. Specifically, P. quinquefolium samples were ground to a powder with the MM400 ball mill (Retsch, Germany) at a vibration fre-quency of 90Hz for 3min. The powdered samples (particle

Thermal analysis curves of the hot-mix asphalt samples exposed in the weathering chamber during 0, 500, 1000, 1500 and 2000 h. 3258 V.F.C. Lins et al. / Fuel 87 (2008) 3254–3261 Author's ...

355. 【】. PerkinElmer|PEPE|（）PEPE、PE、PE、PE、PE、PE ...

Desk-Top High Speed Vibrating Ball Mill with 50ml Alumina Jar - MSK-SFM-3: The MSK-SFM-3 is a compact high speed vibrating ball mill for making small quantity of powder samples at easy and fast. It has higher impact energy created by three dimension movement, e.g. rotation, vibration and oscillation with frequency up to 1200 cycles per minute ...

Infrared spectrophotometers record the relative amount of energy as a function of the wavelength/frequency of the infrared radiation when it passes through a sample. Therefore, chemical structures of different samples will reflect differences in the IR absorption spectrum allowing for identification of a sample.

Mix-milling: 5.0 g substrate (microcrystalline cellulose, paper or eucalyptus) and 0.77 g AC-Air were milled together in an alumina pot with 200 g alumina balls of 5 mm diameter at 500 rpm in a Fritsch P-6 planetary ball mill. One milling cycle included 10 minutes of milling followed by 10 minutes of pause to allow dissipation of heat.

View With Charts And Images A REPORT ON IN-PLANT & MARKETING TRAINING The ACME Laboratories Ltd. The ACME Laboratories Ltd is one of the well renowned pharmaceutical companies in Bangladesh and also in the global area. The vision of this pharmaceutical company is to be recognized as a world class pharmaceutical company by providing high […]

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Apr 21, 2018· The magnetic measurement was performed in a vibrating sample magnetometer (VSM) (BHV-55, Riken, Japan) at room temperature. The UV–Vis spectra of the samples were taken on a UV–vis spectrophotometer (Shimadzu, UV-2550, Japan) + visible sources of 400 W Osram lamps.

Mar 01, 2017· The magnetic properties of the ferrite microspheres were investigated with a vibrating sample magnetometer (VSM) (Quantum Design, USA). Thermogravimetric analysie (TGA) was carried out using a DTG 60 (Shimadzu, Japan) at a heating rate of 10 °C min −1 up to 800 °C. 2.3. Preparation of amine-functionalized Fe 3 O 4 @C nanoparticles

KBr; the aim of this operation was to obtain a perfectly smooth and plain sample surface before Raman micros-copy analysis. Analysis by LC-MS/MS LC-MS/MS analyses were performed by using (Shimadzu UFLC LC-20AD) HPLC system (Shimadzu Corporation, Kyoto, Japan). EZ:FAAST (4 µ AAA-MS 250×2 mm) col-umn was used. A gradient programme was applied for

Mar 03, 2017· A sulfonic acid functionalized titanium dioxide quasi-superparamagnetic nanocatalyst [email protected]@TiO2-OSO3H with average size of 61 nm and semispherical shape with surface area about 97 m2 g−1 with saturation magnetization 17.7 emu g−1 and the coercivity 9.84 Oe was successfully synthesized. The structure and morphology of the nanocatalyst was characterized by …

prepare the sample for testing, mix 1 milligrams of absorbent with 1000 milligrams of KBr uniformly, and then press them on a plate that is transparent under pressure of 2200 kg.cm-2 for 5 minutes. After this operation, the sample is ready for the FTIR test. The range of scan for specimens was between 3900-500 cm-1. Sorption Procedure

The dried samples were ground in a mill and sieved in a sieve shaker of particle size 300 m. ... (Shimadzu-8400S). The adsorbent was encapsulated with KBr spectroscopy grade and by introducing the mix in a piston's cell of a hydraulic pump with compression pressure 15KPa/cm2, the solid transluscent disk was obtained. The FTIR spectrum was ...

FTIR-84005, SHIMADZU Corporation (Kyoto, Japan). Sample of 0.1 g was mixed with 1 g of KBr, spectroscopy grade (Merk, Darmstadt, Germany), in a mortar. Part of this mix was introduced in a cell connected to a piston of a hydraulic pump giving a compression pressure of 15 kPa / cm. The mix was converted to a solid disc which was placed in an

Nov 01, 2008· The hot-mix asphalt is a mixture of mineral aggregate, filler, and asphalt binder, performed in adequate mill, scattered, and compressed in a hot condition. The hot-mix asphalt was exposed in a weathering chamber, and the sample degradation was evaluated using thermal analysis, Fourier transform infrared spectroscopy (FTIR), and gel permeation ...

IR analysis was performed using a Fourier transform IR spectrophotometer (FTIR-8001; Shimadzu Corp.). A total of 2 mg of each polysaccharide sample and 400 mg of KBr were mixed, ground for 5-10 min with an agate mortar and pressed into a 1-mm tablet . IR spectra were recorded in the frequency range of 4,000-400 cm-1.

sample containing approximately 1mg of drug and 200 mg of dried KBr was blended uniformly in an agate mortar and pressed into a translucent disk. The samples were scanned from 400 to 4000 cm − 1 ...

before adsorption using FTIR spectrophotometer (Shimadzu-8400S). 0.1g of the adsorbent was encapsulated with 1g of KBr spectroscopy grade (merk, Darmstadt, Germany) and by introducing the mix in a piston's cell of a hydraulic pump with compression pressure 15KPa/cm2, the solid transluscent disk was obtained which was

Jan 04, 2021· cellulose fibers as during the burial-soil test. Each sample was milled in a cryogenic mill, cold with liquid nitrogen, for a period of 5 minutes. After milling, the powder obtained was mixed with KBr and made into a pellet, and then it was fixed to the FTIR sample plate. Spectra were taken in triplicate for each sample at 400 to 4000cm-1.

An alternative approach, favored by some laboratories, is to use a vibrating agate or steel ball mill. A few milligrams of the sample is placed inside a clean vial together with the balls and ground for a set period of time recommended by the mill manufacturer, typically 30 s. One to three milligrams of the ground powder is then weighed and ...

00293810PEKCL,PE. /. 00271282 KBR WINDOW UNDRILLED 4MM IR. 00291110 DISC-NACL 20.5 X 3MM IR. 00292010 BAF2 DISC 2MM IR. 00293810 KCL WINDOW 3MM THICK PK/2 IR. 00400266 BURNER HEAD 1-SLOT AIR/C2H2 AA. 00400277 NITROUS OXIDE BURNER HEAD AA. 00405087 ...

spectrometry (FTIR) analysis (Shimadzu FTIR 8400S, Japan). FTIR spectra were obtained from KBr pellets with 1 mass% of the powdered resins at wave numbers in the 400 and 4000 cm-1. range. Composite preparation: Portland cement, water, CaCl. 2, bagasse fiber and unmodified/ glyoxalated

Image Quality Infrared Polarizers Datasheet. Specac offer a version of GS57000 series infrared polarizers especially for imaging applications, with anti-reflection coatings as standard and fabricated on zinc selenide (ZnSe) and germanium (Ge) infrared transmitting substrates with a high specification of optical flatness and parallelism. View PDF.

Product Description Sample grinding for KBr pellets and diffuse reflectance. The Specamill grinding accessory is designed to mix a solid sample with an excess of KBr powder for th