Results 261 to 270 of about 13,506 (299)

On Nobert’s Test-Plate and the Striæ of Diatoms

Journal of Cell Science
ABSTRACT The limit of the resolvability of lines, or how small a space can exist between lines and still admit of their being separated under the microscope, appears to be an undecided point. Professor Queckett (‘Treatise on the Microscope,’ 3d ed., p.
W. S. Sullivant, T. G. Wormley
openaire   +1 more source

CHARACTERISATION OF THE ADHESION OF FOULING DIATOMS ONTO TEST SURFACES

Diatom Research, 2007
The dominant presence of marine diatoms fouling the latest non-toxic, antifoul coatings has increased interest in characterising diatom adhesives and the mechanisms of their adhesion. In this study the adhesion of two benthic, fouling diatoms [Craspedostauros australis Cox and Haslea sp. Simonsen (Bacillariophyceae, Ochrophyta)] was measured on 23 test
A. Willis, J. Pacifico, T. M. Dugdale, R. Wetherbee   +3 more
openaire   +1 more source

A test of methods for assessing water quality based on diatoms

SIL Proceedings, 1922-2010, 1991
Un programme de 3 ans a été proposé à la CEC afin de standardiser les méthodes biologiques basées sur les diatomées et établir un "indice de diatomée" unique qui pourrait être appliqué aux fleuves de la Communauté Européenne. L'objectif du présent article est de présenter les principaux résultats de l'étude sur l'indice diatomée de la CEC.
Coste, Michel, Descy, J.P.
openaire   +2 more sources

The Diagnostic Value of the Diatom Test for Drowning, II. Validity: Analysis of Diatoms in Bone Marrow and Drowning Medium

Journal of Forensic Sciences, 1997
Abstract In part two of this series, we investigated the characteristics of diatom frustules recovered from bone marrow and samples of putative drowning medium in case of freshwater drownings. A total of 52 cases of freshwater drowning with diatoms in the femoral bone marrow in which a sample of the putative drowning medium was also ...
openaire   +2 more sources

Objective Diagnosis of Drowning by the "Diatom Test" - A Critical Review.

Forensic science review, 2004
The identification of diatoms in the body tissues to prove a death by drowning (known as the diatom test) dates back to the end of the 19th century. However, in recent decades the reliability of this method was disproved because of an alleged inaccuracy and high false positive rate; nonetheless, the matter is still highly controversial.
BORTOLOTTI, Federica, TAGLIARO, Franco, MANETTO G.   +2 more
openaire   +2 more sources

The dissolution of opaline silica of diatom tests in sea water

Journal of the Oceanographical Society of Japan, 1980
Two different series of measurements have been made of the solubilities and rates of solution in sea water of acid-washed siliceous tests of the diatomsThalassiosira decipiens andRhizosolenia hebetata. The kinetic approach was carried out on the assumption that the tests behave as identical solid spheres.
Akiyoshi Kamatani, John P. Riley, Geoffrey Skirrow   +2 more
openaire   +1 more source

Design and Testing of a New Diatom-Based Index for Heavy Metal Pollution

Archives of Environmental Contamination and Toxicology, 2017
The Tinto and Odiel river basins (SW Spain) are known worldwide for their unique water characteristics. Such uniqueness is a consequence of their flow through the Iberian Pyrite Belt (an area rich in metal sulphides) and the mining activities in the basins.
M. R. Fernández, G. Martín, J. Corzo, A. de la Linde, E. García, M. López, M. Sousa   +6 more
openaire   +2 more sources

[Evaluation of three methods for forensic diatom test].

Nan fang yi ke da xue xue bao = Journal of Southern Medical University, 2015
To compare the efficacy of three methods for forensic diatom test, namely strong acid digestion-centrifuge enrichment-light microscopy (SD-CE-LM), microwave digestion-membrane filtration-automated scanning electron microscopy (MD-ME-SEM), and microwave digestion-membrane filtration-light microscopy (MD-MF-LM).Sixty samples were randomly divided into 3 ...
Yuzhong, Wang, Jian, Zhao, Peng, Li, Sunlin, Hu, Huipin, Wang, Huijun, Wang, Chao, Liu   +6 more
openaire   +1 more source

MD-VF-Auto SEM: A method of the forensic diatom test that may help end the longstanding “war-on-diatoms”

Forensic Science International
The diatom test has been a classical test for drowning diagnosis for over a century. While it is often regarded in literature as a reliable method-even a golden standard-its validity remains a subject of ongoing controversy. This paper emphasized that the major cause for the controversy is from the methodology of the test.
Sunlin, Hu, Liang, Chen, Jie, Ma, Liguang, Li, Yang, Ming, Jingjie, Wu, Yang, Liu, Siyun, Guo, Yuchi, Zhou   +8 more
openaire   +2 more sources

On testing diatomic vibration-rotation wavefunction for high levels

Journal of Computational Physics, 1985
The Morse potential is considered as an example of a model problem whose exact solution can be used to test numerical methods for solving the vibration-rotation equation for diatomic molecules. The difficulty with the exact Morse solution is that it depends on the generalised Laguerre polynomial which is complicated to handle for high vibrational ...
openaire   +2 more sources