Particle size

Xem 1-20 trên 75 kết quả Particle size
  • Standard method of test for particle size analysis of soils describes a procedure for the quantitative determination of the distribution of particle sizes in soils. The following applies to all specified limits in this standard: For the purposes of determining conformance with these specifications, an observed value or a calculated value shall be rounded off “to the nearest unit” in the last right-hand place of figures used in expressing the limiting value, in accordance with ASTM E 29. The values stated in SI units are to be regarded as the standard.

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  • The effects of micronization methods, mechanical and jet millings, on the physico-chemical properties of mushroom (Lentinus edodes) powder were investigated in contrast to shear pulverization. The powders of dried mushroom cap and stipe were prepared to obtain six powders. Compared to shear pulverization, mechanical and jet millings effectively reduced particle size and brought about a narrow and uniform particle size distribution.

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  • Tuyển tập các báo cáo nghiên cứu khoa học trên tạp chí khoa học vật lý quốc tế đề tài: Emulsion Polymers of Core-Shell Styrene-Butyl Acrylate: The Effect of Feeding and Aging Time on Particle Size Distribution

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  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: The role of particle size of particulate nano-zinc oxide wood preservatives on termite mortality and leach resistance

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  • It is to be determined with this test whether the particle size distribution of the powder permits a correct processing.

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  • Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí hóa hoc quốc tế đề tài : Densification characteristics of chromia/alumina castables by particle size distribution

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  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Correction: The role of particle size of particulate nano-zinc oxide wood preservatives on termite mortality and leach resistance

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  • Influence of mn2 concentration and uv irradiation time on the luminescence properties of mn doped zns nanocrystals. The structure and particle size of the obtained powders were measured by X-ray diffraction (XRD) and scanning electron microscopy (SEM) and shown that all samples are single phase with sphalerite crystal structure and average particle size of about 5-7nm.

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  • The importance of particle characterization in both the research and development, and the manufacture and quality control of materials and products that we use in our everyday lives is, in some sense, invisible to those of us not directly involved with these activities. Few of us know how particle size, shape, or surface characteristics can influence, for example, the efficacy of a painreliever, or the efficiency of a catalytic converter, or the resolution of a printer.

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  • Two FCC catalysts with a 60m average size, prepared with different crystallite sizes (0.4 and 0.9m), are studied in terms of total acidity, energy of ammonia desorption, specific surface area, relative amount of Brönsted and Lewis acid sites, crystallite and particle size, and micropore size distribution.

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  • In this article, we report on the preparation of CdSe quantum dots (QDs) by sol-gel method and their optical properties. The average size of QDs is also estimated by using various ways, such as the Scherer’s formula, The Effros-Brus-Kayanuma’s theoretical expression, TEM etc. The TEM images of samples show that the mean sizes of QDs are 4 nm. The mean sizes of QDs are smaller than that of other methods and arranging from 2 to 3.6 nm.

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  • Multilayer ceramic capacitors (MLCC) are indispensable electronic components for advanced electronic technology2-12, but larger capacity and smaller size are needed for future electronic devices. To meet these needs, BaTiO3 particles were downsized, but ferroelectric ceramics lose their ferroelectricity when their particle size is decreased and lose ferroelectricity entirely at a critical size2-11. This is known as the size effect and it impedes the progress of MLCC, so a novel solution has been eagerly anticipated....

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  • Số thứ tự (Theo danh sách lớp) KL thể tích tự nhiên - g (Natural density) Độ bão hoà - G (Degree of saturation) Khối lượng riêng - D (Specific gravity) Độ ẩm tự nhiên - W (Moisture contents) Giới hạn chảy - WL (Liquid limit) KL thể tích khô - gc Giới hạn dẻo - WP (Plastic limit) Chỉ số dẻo - IP (Plasticity index) Thành phần hạt - P (Particle size analysis) - % Hệ số rỗng - eo (Void ratio) 0.01 - 0.005 0.05 - 0.01 0.5 - 0.25 0.25 - 0.1 0.1 - 0.05 ...

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  • Is a branch of polymer science dealing with analysis and characterisation of polymers. üThe complication of macromolecular chains, the dispersion in molecular weight, tacticity, crystallinity, orientation, composition of polymers etc. and complex morphological systems ⇒ analysis of polymer ≠ the small organic materials ⇒ Focus on viscoelastic properties, dynamic mechanical testing.

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  • Acicular BaTiO3 particles were developed using solution systems. The morphology of BaC2O4 0.5H2O was controlled to acicular shape. Its phase transition to BaTiO3 was realized by introducing Ti ions from the coprecipitated amorphous phase. Acicular BaTiO3 particles have an aspect ratio as high as 18 and the particle size can be controlled by varying the growth period of BaC2O4 · 0.5H2O which governs the size of BaC2O4 · 0.5H2O particles. Acicular particles of crystalline BaTiO3 can be used for ultra-thin multilayer ceramic capacitors. ...

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  • PHÂN HỆ PHI SINH VẬT: MÔI TRƯỜNG VẬT LÝ, CÁC NGUỒN TÀI NGUYÊN PHI SINH VẬT Nội dung: 1. Mở đầu 2. Định nghĩa và phân loại vùng ven bờ 3. Các quá trình ven bờ 4. Địa mạo bờ biển 2.2. Phân loại và định nghĩa vùng ven bờ 2.2.1. Phân loại theo mô tả hình thái học - Dựa theo kích cỡ hạt cấu tạo bờ biển (particle size of beach material): · Bờ biển bùn - mud coasts; · Bờ biển cát - sand coasts (quartz, coral sand); · Bờ biển sỏi - gravel/shingle coasts; · Bờ biển...

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  • Ebook Handbook of Fillers this is a pretty good book written about the field of fillers for the plastics industry. As one of the very important field of plastics industry this is. Invite you to refer to the contents of the book to grasp the details.

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  • Marine Sediments are:Particles of various sizes derived from a variety of sources that are deposited on the ocean floor.A vast “library” recording geologic, oceanographic and climatic conditions Remarkably complete compared to land Effects of water velocity on transport: rivers and nearshore vs open ocean...

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  • X-ray diffraction is a tool for the investigation of the fine structure of matter. This technique had its beginnings in von Laue's discovery in 1912 that crystals diffract x-rays, the manner of the diffraction revealing the structure of the crystal. At first, x-ray diffraction was used only for the determination of crystal structure.

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  • Requires improvements in the whole column: – Sub 2 μm particles Porous for optimum mass transfer New bridged hybrid particle required for pressure tolerance (up to 15000 psi) Sizing technology for narrow particle size distribution – Column hardware New frit technology to retain particles New end fittings for high pressure/low dispersion operation – Packing technology New column packing processes to optimize stability

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