定价： 1656元 / 折扣价： 1474 元 加购物车

定价： 816元 / 折扣价： 727 元 加购物车

定价： 2081元 / 折扣价： 1853 元 加购物车

定价： 708元 / 折扣价： 631 元 加购物车

定价： 2081元 / 折扣价： 1853 元 加购物车

定价： 590元 加购物车

5.1 The particle shape of coarse aggregates influences the properties of some construction materials and may affect their placement and consolidation.5.2 This test method provides a means for checking compliance with specifications that limit such particles or to determine the relative shape characteristics of coarse aggregates.1.1 This test method covers the determination of the percentages of flat particles, elongated particles, or flat and elongated particles in coarse aggregates. Two procedures, Method A and Method B, are presented in this standard. Method A is a reflection of the original procedure as developed prior to Superpave and is intended for all non-Superpave applications. Method B is a comparison of the maximum particle dimension to the minimum particle dimension and is intended for use with Superpave specifications.1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.1.2.1 Exception (regarding sieves, per Specification E11)—The values stated in SI units shall be considered standard for the dimensions of the wire cloth openings and the diameter of the wires used in the wire cloth. When sieve mesh sizes are referenced, the alternate inch-pound designations are provided for information purposes and enclosed in parentheses.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 590元 加购物车

5.1 The biological response to materials in the form of small particles, as from wear debris, often is significantly different from that to the same materials as larger implant components. The size and shape (morphology) of the particles may have a major effect on the biological response; therefore, this practice provides a standardized nomenclature for describing particles. Such a unified nomenclature will be of value in interpretation of biological tests of responses to particles, in that it will facilitate separation of biological responses associated with shape from those associated with the chemical composition of debris.5.2 The quantity, size, and morphology of particles released as wear debris from implants in vivo may produce an adverse biological response which will affect the long term survival of the device. Characterization of such debris will provide valuable information regarding the effectiveness of device designs or methods of processing components and the mechanisms of wear.5.3 The morphology of particles produced in laboratory tests of wear and abrasion often is affected by the test conditions, such as the magnitude and rate of load application, device configuration, and test environment. Comparison of the morphology and size of particles produced in vitro with those produced in vivo will provide valuable information regarding the degree to which the method simulates the in vivo condition being modeled.1.1 This practice covers a series of procedures for characterization of the morphology, number, size, and size distribution of particles. The methods utilized include sieves, optical, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and electrooptical.1.2 These methods are appropriate for particles produced by a number of different methods. These include wear test machines (Test Method F732), total joint simulation systems (Guides F1714 and F1715), abrasion testing, methods for producing particulates, such as shatter boxes or pulverizers, commercially available particles, and particles harvested from tissues in animal or clinical studies.1.3 The debris may include metallic, polymeric, ceramic, or any combination of these.1.4 The digestion procedures to be used and issues of sterilization of retrieved particles are not the subject of this practice.1.5 A classification scheme for description of particle morphology is included in Appendix X3.1.6 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.1.7 As a precautionary measure, removed debris from implant tissues should be sterilized or minimally disinfected by an appropriate means that does not adversely affect the particulate material.1.8 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

定价： 646元 加购物车

定价： 646元 加购物车

定价： 515元 加购物车

5.1 This test method is for measuring the mechanically tapped packing density of powders that are smaller than 0.8 mm in diameter, such as Fluidized Catalytic Cracking Catalysts (FCC).1.1 This test method covers the determination of the mechanically tapped packing density of fine catalyst and catalyst carrier particles smaller than 0.8 mm in diameter.1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.1.3 This standard does not purport to address all of the safety concerns, if any associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 515元 加购物车

定价： 156元 / 折扣价： 133 元 加购物车

定价： 260元 / 折扣价： 221 元 加购物车

1.1 In a broad sense, this terminology covers terminology associated with liquid particles dispersed in gas. The principal emphasis, however, is on particles produced by the process of atomization. 1.2 All terms, followed by their definitions, are arranged alphabetically. In addition, the terminology contains several tables wherein terms related to specific subjects are segregated and identified. 1.3 Within the broad scope, the following specific categories are included: 1.3.1 Terms pertaining to the structure and condition of individual particles or groups of particles as observed in nature. 1.3.2 Terms pertaining to the structure and condition of individual particles or groups of particles produced by an atomizing device. 1.3.3 Terms pertaining to atomizing devices according to the primary energy source responsible for spray development. (When more than one term is used for the same device or class of devices, the alternative term is followed by the preferred term.) Definitions of the devices may refer to their construction, operating principle, or distinctive spray characteristics. The atomizers, however, are not classified by their respective areas of application or end use. Moreover, the listed terms are generic and do not include brand names, trademarks, or proprietary designations. 1.3.4 Terms pertaining to statistical parameters involving particle measurement, particle size, and size distribution functions. 1.3.5 Terms pertaining to instruments and test procedures utilized in the characterization of liquid particles and sprays. 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 590元 加购物车

定价： 590元 加购物车