the samples were homogenized in a ball mill

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  • Solvent-free MALDI-MS for the analysis of biological ...

    Solvent-free MALDI-MS for the Analysis of Biological Samples via a Mini-Ball Mill Approach Sarah Trimpin and Max L. Deinzer Department of Chemistry, Oregon State University, Corvallis, Oregon, USA An efficient, low sample load mini-ball mill (MBM) sample preparation procedure was developed for solvent-free MALDI analysis of peptides and proteins.

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  • (PDF) Ultra high-pressure homogenized emulsions stabilized ...

    Oil-in-water pre-emulsions (15% sunflower + 5% olive oils) obtained by colloid mill homogenization (CM) at 5000 rpm using whey protein isolate at different levels (1, 2 and 4%) were stabilized by ...

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  • RESEARCH ARTICLE Open Access Comparison of freezing ...

    Leaf samples (100–200 mg) were homogenized with a ball mill, extracted in 1 ml of 0.2 N perchloric acid for 1 h at 4°C to extract free polyamines and centrifuged at 16000 x g at 4°C for 30 min. Since we detected only very low levels of bound polyamines in our samples (data not shown), these were not further investigated. To 100 μl

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  • Homogenized in a sentence (esp. good sentence like quote ...

    12 The dried sample is crushed and homogenized, and stored in a jar. 13 Milk is usually homogenized, forced under high pressure through small openings to distribute the fat evenly. 14 Usually the sample homogenized, tested, and then discarded. 15 The mixture is homogenized in a ball mill for 15 minutes.

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  • Use of Stable Isotope Signatures to Determine Mercury ...

    Once they had been returned to the lab, samples were lyophilized, homogenized by a ball mill, and stored in borosilicate vials. Lake trout samples from Lakes Superior and Ontario were collected by Clarkson University during U.S. Environmental Protection Agency (EPA) monitoring cruises in 2006. Each sample represents a homogenized composite of five

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    • analytica ball mills

      Ball Mills for rapid batchwise comminution of medium-hard, soft, brittle, fibrous, temperature-sensitive and moist samples down to the finest particle size. Chat online Rapid Method for Sodium Hydroxide Fusion of Concrete and Brick ...

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    • Mill (grinding) - Wikipedia

      A mill is a device that breaks solid materials into smaller pieces by grinding, crushing, or cutting. Such comminution is an important unit operation in many processes.There are many different types of mills and many types of materials processed in them. Historically mills were powered by hand (e.g., via a hand crank), working animal (e.g., horse mill), wind or water ().

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    • Homogenize - definition of homogenize by The Free Dictionary

      A bead mill homogenizer is a good alternative to ultrasonic technology, especially for tough-to-disrupt cells like cyanobacteria, yeast, spores and microalgae, because ultrasonic homogenizers generally cannot homogenize those samples without the addition of .

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    • For preparing a homogenized salt mixture of 2 salts, is it ...

      All Answers ( 7) The nature of the solids and the force in the ball mill, may locally achieve the concentrations given by the liquidus line, at a lower Bulk temperature. Processing at a lower temperature often results in a longer time to reach a homogeneous bulk mixture.

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    • 5.2 Dissolved Oxygen and Biochemical Oxygen Demand ...

      The sample is usually fixed and titrated in the field at the sample site. It is possible, however, to prepare the sample in the field and deliver it to a lab for titration. Dissolved oxygen field kits using the Winkler method are relatively inexpensive, especially compared to a meter and probe.

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    • Frozen Tissue

      Nov 15, 2011 · The freezer mill operation for 25 stony coral samples, will take 2 to 5 hr with a minimum of two people working together. Most of the time is spent removing extraneous endolithic algae and excess skeleton from coral samples prior to grinding. Grinding 20 samples with a mortar and

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    • Two cytochromes P450 catalyze S-heterocyclizations in ...

      The samples were subsequently homogenized on a ball mill (Retsch MM400) using 5 mm diameter steel beads, shaking at 25 Hz for 2 min. The tissue extracts were heat-treated at 65°C for 10 min, spun at 17,000×g rcf, 4°C, for 5 min, passed through 0.45 µm PTFE filters, and .

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    • Ball Mill Design/Power Calculation

      The basic parameters used in ball mill design (power calculations), rod mill or any tumbling mill sizing are; material to be ground, characteristics, Bond Work Index, bulk density, specific density, desired mill tonnage capacity DTPH, operating % solids or pulp density, feed size as F80 and maximum 'chunk size', product size as P80 and maximum and ...

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    • data, the dedicated Thermo Scientific™ Eager Xperience ...

      TABLE 2. CHNS determination of petrochemical samples Results Different solids, viscous and liquid petrochemical samples were chosen to show the reproducibility obtained with the system. Coal, coke, graphite, lignite and catalyst samples were homogenized by a ball mill while viscous and liquid samples were analyzed without pre -treatment.

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      The materials of 700 cm 3 volume sample with the balls was charged to the ball mill and ground initially at 100 revolutions. The ground sample was screened wit h the test sieve and the undersize sample was weighed and fresh unsegregated feed was added to the oversize to bring its weight back to that of original charge. T he numbers

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    • The Effect of Rolling As-Cast and Homogenized U-10Mo ...

      microstructure, end-state mechanical properties, residual stresses, and defects, their effect on the mill during processing, and eventually, their in-reactor performance. In the work documented herein, studies were conducted to determine the effect of cold and hot rolling the as-cast and homogenized U-10Mo on its microstructure and hardness.

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    • Influence of homogenization efficiency on milk fat content ...

      Milk samples (raw, homogenized, microfluidized) with different average fat globule diameters as determined by photon correlation spectroscopy were measured for fat content by a MilkoScan 133B infrared analyser in comparison to a standard chemical method.

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    • Pasteurized vs. Homogenized Milk: What's The Difference ...

      Nov 29, 2016 · While it is possible to have pasteurized milk that hasn't been homogenized and homogenized milk that hasn't been pasteurized, most milk found in U.S. supermarkets have undergone both processes. If they are to occur together, milk is typically pasteurized first and then homogenized, because the heat from pasteurization makes fat molecules easier to break down for homogenization.

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    • ball mill homogenizer

      Ball Mill - RETSCH - powerful grinding and homogenization. RETSCH is the world leading manufacturer of laboratory ball mills and offers the perfect product for each application. The High Energy Ball Mill E max and MM 500 were developed for grinding with the highest energy input.

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    • Contamination risk of stable isotope samples during milling

      spectrometry analysis, wood must be homogenized, and a convenient method involves a ball mill capable of milling samples directly in sample tubes. However, sample-tube plastic can contaminate wood during milling, which could lead

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    • Laboratory magazine articles and reports for download - RETSCH

      The decision to use a Planetary Ball Mill for this application was mainly based on the fact that it produces very small particle sizes which were considered an important prerequisite for more in-depth analysis of the yeast cells. Particle sizes in the submicron range promote a .

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    • C. Dagounaki*, C. Sikalidis**, A. Kassoli-Fournaraki*, A ...

      The added components were samples from two limestones ... 12% and 15%. All the mixtures were homogenized in a ball mill for 24 hours. 7 g of the final powders were used to .

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    • Influence of homogenization efficiency on milk fat content ...

      The objective of our study was to evaluate the effect of homogenization on fat content determination by infrared analysis as a function of fat globule diameter in raw milk, homogenized in three different ways: (1) by the built-in ball homogenizer of the infrared MilkoScan 133B analyser; (2)standard homogenization; and (3)microfluidization.

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    • Metabolomic analysis of the interaction between plants and ...

      Plant samples were homogenized using a ball mill (Retsch , Haan, Germany). For extraction, 49–51 mg of each homogenized plant sample was weighed in a microcentrifuge tube. dry masses were weighed and then homogenized in a ball mill in microcentrifuge tubes with the addition of a little purified and calcined sea sand (Merck ...

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    • Determination of Metals in Dietary Supplements Using HR-CS ...

      Samples and Reagents Mineral tablets were finely ground and homogenized using a ball mill. Ginseng powder and the content of a capsule were analyzed as received without further sample treatment. A necessary dilution for the determination of Zn was obtained by the addition of spectral carbon powder.

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    • METHODOLOGY - Metallurgist & Mineral Processing Engineer

      Then the samples were homogenized by means of a riffle splitter, and the samples reduced to 2kg which was the mill feed. The mill feed samples were taken for chemical analysis at the SGS laboratory. Wet grinding of the ore samples, individually, was then done in a laboratory stainless steel ball mill using steel balls of about 8mm in size at a ...

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    • Ball Mills

      In all ore dressing and milling Operations, including flotation, cyanidation, gravity concentration, and amalgamation, the Working Principle is to crush and grind, often with rob mill & ball mills, the ore in order to liberate the minerals. In the chemical and process industries, grinding is an important step in preparing raw materials for subsequent treatment.

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    • Elevated concentrations of U and co-occurring metals in ...

      were performed at beamline 11-2 in the Stanford Synchrotron Radiation Lightsource. MW1, MW2, and BRS soil samples were finely ground with mortar and pestle and homogenized with a ball mill (crescent wig-l-bug), with oven dried Boron Nitride (Sigma-Aldrich 99.99%), to achieve a manageable volume.

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    • Effect of Homogenization Method on ... - OPS Diagnostics LLC

      The plate with sample was placed into the mixer mill (HT Homogenizer, OPS Diagnostics) and homogenized at 1200 rpm for 2 minutes. The lysate was then transferred to a 2ml microfuge tube, followed by the addition of 20 μl SDS and 20 μl Proteinase K.

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    • Hypogymnia Physodes Samples from - U.S EPA Web Server

      Prior to digestion for -element analysis, lichen samples were ground and homogenized in a SPEX (Metuchen, NJ) 8000M ball mill equipped with zirconium balls. Grinding was performed at the University of Michigan laboratory of Dr. Joel D. Blum. Aliquots of homogenized lichen samples (25-35 mg) were digested in batches of 30-35 in a

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