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Zeta potential provides a guide to the stability of solid or liquid particles in a liquid system, such as intravenous foods. A new ASTM International standard focuses on the zeta potential in systems containing biological material such as proteins, DNA, liposomes and other organic materials. The new standard, ASTM E2865 , Guide for Measurement of Electrophoretic Mobility and Zeta Potential of…, ASTM Committee E56 Next Meeting:, Nov. 12-13, November Committee Week, Atlanta Ga., Technical Contact:, Alan Rawle, Ph.D, Malvern Instruments Inc., Westborough, Mass., Phone: 508-768-6434; alan.rawle@malvern.com, ASTM Staff Contact:, Kathleen McClung, Phone: 610-832-9717; kmcclung@astm.org, ASTM PR Contact:, Barbara Schindler, Phone: 610-832-9603; bschindl@astm.org R elease #9317
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Current members of ASTM International Committees C01 on Cement and C09 on Concrete and Concrete Aggregates , and other interested parties, are invited to join a new C01 subcommittee, C01.98 on Sustainability Assessment. The scope of C01.98 is to support the development and maintenance of standards related to methodologies and metrics for assessing sustainability in the manufacture and use of…
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A new ASTM International practice provides a standard for preparing a mixture of cement paste that will simulate the shearing experienced by the cement paste in concrete. The new standard, ASTM C1738 , Practice for High-Shear Mixing of Hydraulic Cement Pastes, was developed by Subcommittee C01.22 on Workability , part of ASTM International Committee C01 on Cement . According to Chiara Ferraris,…
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Rheologists are encouraged to join in the development of a proposed new practice that will help standardize calibration of rotational rheometers to obtain accurate normal force measurements. ASTM WK33687 , Practice for Normal Force Calibration for Rotational Rheometers, is being developed by Subcommittee E37.08 on Rheology , part of ASTM International Committee E37 on Thermal Measurements . The…, ASTM Committee E37 Next Meeting:, Aug. 10-11, in conjunction with the North American Thermal Analysis Society Annual Conference, Des Moines, Iowa, Technical Contact:, Kenneth Aniunioh, Shimadzu Scientific Instruments, Laurel, Md., Phone: 864-633-7690; kenebaano@yahoo.com, ASTM Staff Contact:, Thomas O’Toole, Phone: 610-832-9739; totoole@astm.org, ASTM PR Contact:, Barbara Schindler, Phone: 610-832-9603; bschindl@astm.org Release #8923
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ASTM International Committee E56 on Nanotechnology has created a new subcommittee, E56.06 on Nano-Enabled Consumer Products. The scope of E56.06 is to develop scientifically credible standards for identification, evaluation and assessment of engineered nanomaterials in consumer products. Members of E56.06 will develop standards for determining the presence of engineered nanomaterials in consumer…, ASTM Committee E56 Next Meeting:, Nov 15-16, November Committee Week, San Antonio, Texas, Technical Contact:, (Chairman, E56) Debbie Kaiser, National Institute of Standards and Technology, Gaithersburg, Md., Phone: 301-975-6759; debra.kaiser@nist.gov ; (Subcommittee E56.06) Aleks Stefaniak, National Institute for Occupational Safety and Health, Morgantown, W.Va., Phone: 304-285-6302; boq9@cdc.gov, ASTM Staff Contact:, Timothy Brooke, Phone: 610-832-9729; tbrooke@astm.org, ASTM PR Contact:, Barbara Schindler, Phone: 610-832-9603; bschindl@astm.org Release #8698/Sept2010
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Rapid hardening hydraulic cements are used in a variety of applications in which reduced cementitious contents are desired or early service is needed. Included among these applications are paving, construction, stucco, mortar and block. A newly approved ASTM International standard covering these cements, ASTM C1600/C1600M , Specification for Rapid Hardening Hydraulic Cement, has been developed by…, Type URH, —ultra rapid hardening, for use where ultra high early strength is desired;, Type VRH, —very rapid hardening, for use where very high early strength is desired;, Type MRH, —medium rapid hardening, for use where mid-range rapid hardening, high early strength is desired; and, Type GRH, —general rapid hardening, for use when the higher strength properties of Type VRH or a Type MRH cement is not required. “ASTM C1600 lists minimum requirements for compressive strength, setting time, shrinkage and soundness (autoclave expansion),” says Hicks. “Optional specifications for sulfate expansion, alkali silicate reactions with aggregates, heat of hydration and expansion in water are also…
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The ASTM International Proficiency Testing Center is pleased to offer a 2010 Proficiency Testing Program on Thermal Analyses of Plastics (TAP) to laboratories who need a statistical quality assurance tool that will enable them to improve and maintain a high level of performance in conducting ASTM Differential Scanning Calorimetry (DSC), Oxidative-Induction Time (OIT) by Differential Scanning…, ASTM D3418, , Standard Test Method for Transition Temperatures and Enthalpies of Fusion and Crystallization of Polymers by Differential Scanning Calorimetry (DSC);, ASTM D3850, , Standard Test Method for Rapid Thermal Degradation of Solid Electrical Insulating Materials By Thermogravimetric Method (TGA); and, ASTM D3895, , Standard Test Method for Oxidative-Induction Time of Polyolefins by Differential Scanning Calorimetry. For each test trial, laboratory participants receive two sample materials along with interactive electronic data report forms and test instructions. Using the specified ASTM program tests, participating laboratories conduct the tests of their choice that they routinely run. Upon completion of…
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A revision to an important ASTM nanotechnology standard incorporates a large-scale interlaboratory study that took place in 2008. The revised standard, ASTM E2490 , Guide for Measurement of Particle Size Distribution of Nanomaterials in Suspension by Photon Correlation Spectroscopy (PCS), is under the jurisdiction of Subcommittee E56.02 on Characterization: Physical, Chemical and Toxicological…
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A workshop on the role of standards in the emerging field of nanotechnology will be held Oct. 8-9, 2008, at the National Institute of Standards and Technology near Washington, D.C. The workshop, "Enabling Standards for Nanomaterial Characterization," is being co-sponsored by the National Cancer Institute's Nanotechnology Characterization Laboratory, the National Institute of Standards and…
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The battle against cancer is being fought on many fronts. Among the most cutting-edge research efforts are attempts to engineer nanotechnology-based therapies. To aid in this endeavor, the Nanotechnology Characterization Laboratory, part of the National Cancer Institute’s Alliance for Nanotechnology in Cancer and the National Cancer Institute at Frederick, has developed methods for nanoparticle…, E2524, , Test Method for Analysis of Hemolytic Properties of Nanoparticles, -E2524 is a protocol for examining the destruction of red blood cells (hemolysis) that can lead to anemia, jaundice and other issues. All intravenously administered drugs must be examined to determine potential for hemolysis. • , E2525, , Test Method for Evaluation of the Effect of Nanoparticulate Materials on the Formation of Mouse Granulocyte-Macrophage Colonies, -E2525 describes a method for evaluating nanoparticle stimulation or inhibition of the maturation of certain bone marrow cells (macrophages). A common side effect of anti-cancer drugs is inhibition of this process, and bone marrow cells may be particularly sensitive to nano-scale material. • , E2526, , Test Method for Evaluation of Cytotoxicity of Nanoparticulate Materials on Porcine Kidney Cells and Human Hepatocarcinoma Cells, -Because studies have indicated that many nanoparticles are cleared from the body through the kidney or liver, these organs are good choices for target organ toxicity evaluation. E2526 presents a method for evaluation of nanomaterial toxicity by examining effects on kidney and cancerous liver cells. Martin Fritts is senior principal scientist at the Nanotechnology Characterization Laboratory and…