Results 261 to 270 of about 2,783,159 (312)

A new material of cryopreserving cell samples

Cryobiology, 2020
Cryopreservation was first studied in early twentieth century, and the cryopreservation of cell and tissue samples has become an inseparable process in biology research labs, helping scientists to store living materials and to accumulate specimens.
Tiantian, Liu, Duo, Xu, Rong, Zhou
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Materialized Sample Views for Database Approximation

22nd International Conference on Data Engineering (ICDE'06), 2006
We consider the problem of creating a sample view of a database table. A sample view is an indexed materialized view that permits efficient sampling from an arbitrary range query over the view. Such "sample views" are very useful in applications that require random samples from a database: approximate query processing, online aggregation, data mining ...
Shantanu Joshi 0001, Christopher M. Jermaine   +1 more
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Maintenance of materialized views of sampling queries

[1992] Eighth International Conference on Data Engineering, 2003
The authors discuss materialized views of random sampling queries of a relational database. They show how to maintain such views in the presence of insertions, deletions, and updates of the base relations. The basic idea is to reuse the maximal portion of the original sample when constructing the updated sample.
Frank Olken, Doron Rotem
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The role of sustainable materials in sample preparation

Analytical and Bioanalytical Chemistry, 2023
Sample preparation is a constantly evolving step in the measurement process with a positive effect on its performance. Its evolution has been marked by an underlying environmental commitment, with simplification, miniaturization, and automation being three of its driving forces.
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Sampling of biological materials for infrared spectroscopy

Analytical Biochemistry, 1964
Abstract Various methods for examining the infrared spectra of proteins have been investigated using yeast alcohol dehydrogenase and ribonuclease as typical proteins. These methods include films cast from aqueous solutions, KBr disks, and agar films.
L, MAY, R L, BOCCALATTE
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Applications of monolithic materials for sample preparation

Journal of Pharmaceutical and Biomedical Analysis, 2014
Recent advances in monolithic columns have made them an alternative to traditional packed columns used in liquid chromatography as well as capillary electrochromatography (CEC). The monolithic columns have been extensively studied and shown to possess several advantages that make them a promising and potential substitute for the particle packed columns.
Tarang, Nema, Eric C Y, Chan, Paul C, Ho
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Sampling of Dredged Material

2005
The guidance contained in this Guidelines for the Sampling and Analysis of Dredged material Intended for Disposal at Sea, addresses the points above and is an amalgamation of two documents produced for the London Convention and the 1996 Protocol thereto: Guidelines for the sampling of sediment ...
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Sampling and sample preparation of environmental material

1986
Methode de prelevement et de preparations d'echantillons pour: l'air (gaz, vapeurs et particules), l'eau et les solides (sol, sediments)
Richard G. Melcher, Thomas L. Peters, Herbert W. Emmel   +2 more
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Nested Sampling for Materials

2017
This chapter develops nested sampling into a powerful tool for the calculation of pressure-temperature phase diagrams, and demonstrates how it may be applied to single species and binary systems, including the Lennard-Jones system, a binary Lennard-Jones alloy, and an EAM model for Aluminium. A comparison to parallel tempering is also presented.
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Sampling of Particulate Material

2009
Particulate materials are often produced in very large quantities. In contrast, usually small quantities are used for characterization or applications. There are two reasons that small samples often give poor representation of the average quality of the bulk. One reason is the discrete nature of particles.
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