Magnesium chloride solution was added to enhance flocculation during centrifugation. Afterwards, samples were freeze-dried. Following this, the samples were homogenized using a ceramic ball mill and measured for total carbon and nitrogen content by dry combustion with the Vario EL CN analyser (Elementar Analysensysteme , Hanau, …
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About 10 g samples were freeze-dried, ground and homogenized in a zirconia ball-mill. The samples mixed with 190Os tracer solutions were dissolved in carius tubes and Os extracted in liquid bromine. Os was further purified using micro-distillation. Os isotopes were measured using N-TIMS on Dartmouth Triton.
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The choice between wet and dry milling is, in general, unimportant in small-scale milling but is a major technical problem when large-scale milling in the metallurgical industries is involved. On purely mechanical grounds it is difficult to see any great difference in fundamental principles between wet and dry milling, since dry milling may be regarded as wet milling with a …
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Up to 6 liver samples are thoroughly homogenized in this way. Various combinations of grinding ball sizes and numbers as well as sample volumes were tested for the homogenization of liver with the result that a few 10 mm balls had a much better size reduction effect on the tissue structure than many smaller balls.
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Before total RNA extraction, the frozen epiphyses were homogenized using a ball mill (Braun Mikro-Dismembrator S) at 2600 rpm for 60 s. The samples were then processed and sequenced at the Center for Mouse Genomics at the University of Calgary. Total RNA-Seq kits (Life Technologies) were used to obtain Poly-adenylated mRNAs only from the total ...
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Sample Preparation and Analytical Methods Before analysis, the samples were freeze dried and then ground and homogenized in an agate ball mill. For X-ray fluorescence analy-sis (XRF), 600 mg of the sample powder were mixed with 3600 mg lithium tetraborate (Li2B4O7, Spektromelt), preoxidized at 500°C with NH4NO3, and fused to glass beads. The ...
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The fungal culture was homogenized with glass beads twice for 4 min at 25 m s −1 (Retsch, Ball Mill MM 400). Next, the samples were extracted twice with ethyl acetate. The extracts were dried with anhydrous sodium sulfate, evaporated under reduced pressure at 40 °C, and 2 mL of ethyl acetate was added.
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the samples were homogenized in a ball millJul 24, 2017· The mixture of powders was homogenised in a ball mill,The mean values of the data were calculated
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The samples were homogenized with a ball mill setting of 45 Hz for 4 min, and then ultrasounded in ice water for 5 min After that, the samples were centrifuged at 12,000 rpm and 4 °C for 15 min, and the supernatants were transferred into 5 ml EP tubes Again, 1 ml of methanol: H 2 O = 3:1 (v/v) and 1 ml of ethyl acetate were added The ball
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Ball mills and bead beaters can be considered as the most suitable methods for disruption of elastic and hard tissues. 29,30 The disadvantage of using ball mills and bead beaters is a possible sample heating, which may result in the decomposition of thermally unstable metabolites. The sample adhesion to the lysing balls or matrix may also ...
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The homogenized samples were transferred from the ball mill cylinder to glass tubes, and the cylinder was rinsed with 1.0 mL of 80% ice-cold methanol three times. The combined extracts were sonicated for 10 min, then centrifuged (Thermo Scientific; Model Sorvall ST16, Ottawa, Canada) for 10 min at 5000 rpm.
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seen to the S2 peak, the process was repeated. Method A was run on only two samples from the Oungre core. Method B involved the samples being homogenized through the same ball mill process but were then loaded immediately to the Hawk pyrolysis. In addition to the above analyses, samples were also subject to core extract, XRD and MICP analyses ...
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The mix proportions were homogenized for 1 h using a ball mill containing plastic balls a mixing media.A moisture content of 12 wt% was added, and the mixture was again homogenized for 30 min. Then, 110 g was measured and poured in a rectangular steel mold, then a pressure of 40 MPa was applied to form specimens measuring 110 × 50 × 10 mm.
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Samples were homogenized by a ball mill. Table 2 shows the CHNS/O of the vegetals used as biofuels while Table 3 indicates the relative Heat Values and the CO 2 Emission Trade calculated automatically by the software. 4
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Thereafter, 100 µL methanol (MeOH) and 60 µL 10 M aqueous sodium hydroxide were added and the samples were homogenized in a ball mill (20 Hz, 5 min, 22°C, MM 400, Rentsch, Haan, Germany). The crude suspension was then hydrolysed for 30 min at 60°C.
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Sub-samples from squeeze cakes were freeze-dried and ground in an agate ball mill for subsequent solid-phase analyses. In this way, the sub-samples were homogenized and integrated over the whole length of the WRC samples. …
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zinc oxide and ferric oxide are taken as starting materials. Mixture of these oxides were homogenized by using ball-mill and then treated with a ligand to produce a precursor. The samples obtained after the decomposition of precursor were characterized by infrared spectral
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The samples were homogenized with a ball mill setting of 45 Hz for 4 min, and then ultrasounded in ice water for 5 min. After that, the samples were centrifuged at 12,000 rpm and 4 °C for 15 min, and the supernatants were transferred into 5 ml EP tubes. Again, 1 ml of methanol: H 2 O = 3:1 (v/v) and 1 ml of ethyl acetate were added. The ball ...
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Dried sediment samples were homogenized and ground into a fine powder using a ball mill. The "Champagne test" [ Jaschinski et al., 2008 ] was used to determine if samples contained inorganic C. Only four samples (all from WAP-M core depths >60 cm) contained sufficient carbonate C to cause reaction with HCl.
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The samples were homogenized in a ball mill and the sintering temperatures were 1500°C and 2200°C, during times that varied of 30 until 240 minutes. The …
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Prior to chemical analysis, the samples were freeze-dried, ground, and homogenized in agate ball mills. For X-ray fluorescence (XRF) anal-ysis, 600 mg of the sample powder was mixed with 3600 mg dilithium tetraborate (Li 2B 4O 7, Spectromelt by Merck), preoxidized at 500°C with NH 4NO 3, and fused to glass beads in Pt crucibles. For the ...
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Ball milling is a size reduction technique that uses media in a rotating cylindrical chamber to mill materials to a fine powder. As the chamber rotates, the media is lifted up on the rising side and then cascades down from near the top of the chamber. With this motion, the particles in between the media and chamber walls are reduced in size by ...
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Sediment samples were stored at -18°C until drying at 60 °C in the drying oven. For all geochemical analyses, soil and sediment samples were ground in a vibratory disk mill using a steel grinding set. Rock samples were packed in clean aluminum foil and crushed with a hammer to a size suitable for milling.
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One part of the soil samples were homogenized in ball mill for 4 min at 45 Hz in 0.5 mL methanol solution (V methanol: V H2O = 3:1), then ultrasound treated for 5 min (incubated in ice water) for 5 times. The supernatant (0.4 mL) was transferred into a fresh centrifuge tube after centrifuged for 15 min at 10000×g at 4 °C.
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Nine samples (samples weight ranged from 8.8 to 36.9 kg) were subjected to Bond Ball Mill Work Index (BWI) testing. Each sample was stage-crushed to -6 mesh and homogenized. The test was performed at 80 mesh of grind (180 μm). Six samples were subjected to Abrasion Index (Ai) testing. Each sample was stage-crushed to -3/4 inch and …
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Samples were homogenized by a ball mill. Table 1 shows the CHNS data of six coal samples, which were analyzed ten times consequently. The calibration was performed with 2–3 mg of BBOT (2,5-Bis (5-ter-butyl-benzoxazol-2-yl) thiophene) OEA Standard. No matrix effect was observed when changing the sample. Figure 3 shows a typical CHNS chromatogram.
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The fresh soybean leaves or seeds 0.5 1g were homogenized using a ball mill grinder 30 Hz Retsch MM300 and zirconium oxide grinding beads with 2 3mL 80 ice cold methanol for 5 min at 4 C The homogenized samples were transferred from the ball mill cylinder to glass tubes and the cylinder was rinsed with 1.0 mL of 80 ice cold methanol . Get Price
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The samples were measured by weight (20 mg each) and were then added to 1 mL lipid extract (methyl tert-butyl ether/methanol = 3/1, v/v, mixed with the internal standard). The internal standards were listed in Table 2. With the addition of steel balls, the mixtures were homogenized using a ball mill.
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samples were homogenized in a ball mill (20 Hz, 5 min, 22°C, MM 400, Rentsch, Haan, Germany). The crude suspension was then hydrolysed for 30 min at 60°C. Directly after hydrolysis, samples were neutralized (pH 6-7) on ice with 70 µL of 50% acetic acid and extracted as described below. Lipid Extraction
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The frozen (−20°C) sediment samples were freeze-dried (Christ LOC-1M Alpha 1-4 and Christ Delta 1-24 LSCplus, Osterode am Harz, Germany) for 60–72 h. Except for the grain size analyses, the dried samples were homogenized in an agate ball mill (Fritsch Pulverisette, Idar-Oberstein, Germany) at 200 rpm for 10 min. Carbon, Nitrogen, and Sulfur
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The samples were first air-dried, ground and homogenized in a planetary agate ball-mill (Retsch PM100) and then prepared and analysed in a batch system. Each batch contained a method reagent blank, certified reference materials and some replicates.
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Ball milling technique, using mechanical alloying and mechanical milling approaches were proposed to the word wide in the 8th decade of the last century for preparing a wide spectrum of powder materials and their alloys. In fact, ball milling process is not new and dates back to more than 150 years. It has been used in size comminutions of ore, mineral dressing, preparing talc …
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A mixture of fat and oil with lecithin was homogenized at 20 using a homogenizer Ultraturrax T-25 (Janke Kunkel, Germany) with a rotation speed of 6000 rpm for 5 min. The spreadable cocoa cream samples were produced in a laboratory ball mill ino Produkt, Serbia), with a capacity of 5 …
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Samples must be homogenized to an adequate degree of analytical fineness and uniformity for chemical and physical analytical methods. Proper sample preparation can impact throughput, data quality, and cost of analysis. We offer a comprehensive range of laboratory mills, grinders, sonicators, and homogenizers for coarse, medium, fine, and ...
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