Results 251 to 260 of about 13,506 (299)

Numbers, Sizes, and Types of Diatoms Around Estuaries for a Diatom Test

American Journal of Forensic Medicine & Pathology, 2011
We collected 68 fresh, brackish, and seawater samples from various sites around the estuaries of 2 rivers at high and low tides. Seawater flowed approximately 2.4 (salinity, 2.2% at the site) and 1.2 km (1.8%) upstream of the estuaries, but the surface comprised essentially fresh water up to the mouth.
Eiji, Kakizaki, Shuji, Kozawa, Masahiro, Sakai, Nobuhiro, Yukawa   +3 more
openaire   +2 more sources

Testing the response of benthic diatom assemblages to common riverine contaminants

Science of The Total Environment, 2021
Benthic diatoms constitute keystone assemblages in riverine ecosystems, and their structure is used to support regulatory water quality assessment. However, no standard ecotoxicological tests exist using integrated responses of the benthic diatom assemblages.
Tânia, Vidal, Martha, Santos, Joana I, Santos, Ana T, Luís, Mário J, Pereira, Nelson, Abrantes, Fernando J M, Gonçalves, Joana L, Pereira   +7 more
openaire   +2 more sources

Diatoms in space: testing prospects for reliable diatom nanotechnology in microgravity

SPIE Proceedings, 2007
The worldwide effort to grow nanotechnology, rather than use lithography, focuses on diatoms, single cell eukaryotic algae with ornate silica shells, which can be replaced by oxides and ceramics, or reduced to elemental silicon, to create complex nanostructures with compositions of industrial and electronics importance. Diatoms produce an enormous
Richard Gordon, Richard B. Hoover, Jack A. Tuszynski, Javier de Luis, Philip J. Camp, Mary Ann Tiffany, Stephen S. Nagy, Mostafa Fayek, Pascal J. Lopez, Beatriz E. Lerner   +9 more
openaire   +1 more source

A Test of the Influence of Cyclotron Resonance Exposures on Diatom Motility

Health Physics, 1994
An attempt was made to test the hypothesis (McLeod et al. 1987; Smith et al. 1987) that a certain combination of direct current and alternating current magnetic field exposures at room temperature results in an increase in motility of a marine diatom (Amphora coffeaeformis) to a maximum value.
A V, Prasad, M W, Miller, C, Cox, E L, Carstensen, H, Hoops, A A, Brayman   +5 more
openaire   +2 more sources

Diatom test with Soluene-350 to diagnose drowning in sea water

Forensic Science International, 1999
The authors tested the Soluene-350 method to detect diatoms in three cases of sea water drowning. The negative results obtained in all three cases prompted us to re-test the method on samples of fresh water and sea water microalgae. The experiment showed that the siliceous frustule of sea water diatoms is solubilized by Soluene-350 while that of fresh ...
LAURA SIDARI, DI NUNNO, Nunzio, FULVIO COSTANTINIDES, MAURO MELATO   +3 more
openaire   +4 more sources

On testing difference equations for the diatomic eigenvalue problem

Journal of Computational Chemistry, 1988
AbstractThe determination of the vibration‐rotation eigenvalues (for an electronic state of a diatomic molecule) is done using various algorithms, where the differential equation y″ + f(r)y = 0 (with given initial values yo and y′o at an origin ro) is to be integrated, that is, to be replaced by a “convenient” difference equation (DE).
Hafez Kobeissi, Majida Kobeissi, Ali El Hajj   +2 more
openaire   +1 more source

A test on different aspects of diatom processing techniques

Journal of Applied Phycology, 2007
A factorial experiment was carried out in order to assess the effects of four treatment steps in diatom processing techniques (the quantity of hydrogen peroxide added to the sample, the time allowed to the digestion reaction, the use of centrifugation and the method used to settle the frustules onto the coverslip) on different aspects of the quality of
Saúl Blanco, Irene Álvarez, Cristina Cejudo   +2 more
openaire   +1 more source

The Diatom Test for Drowning in Ontario

Canadian Society of Forensic Science Journal, 1996
The diatom test for drowning has proved to be a useful, reliable, and valid test for the postmortem diagnosis of drowning in hundreds of cases of drowning in Ontario, Canada. In Ontario, the test has been largely applied to the femoral bone marrow which has facilitated the referral of cases from sites outside of the Office of the Chief Coroner for ...
openaire   +1 more source

An Evaluation of the Diatom Test in Deaths of Professional Divers

Medicine, Science and the Law, 1984
The use of the Diatom Test for drowning is controversial. In order to make a more realistic approach in the clinical field it was routinely used and evaluated in a study of the deaths of seventy professional divers where history and mode of death were accurately monitored.
openaire   +2 more sources

Types of diatoms in China’s three major rivers and the possible application for an automatic forensic diatom test

Australian Journal of Forensic Sciences, 2014
The diatom test is the most reliable approach that provides scientific support for diagnosis of drowning. However, there are limitations, which, made forensic scientists stop using the test, such as the fact that it is time-consuming and lack of domain knowledge of the diatom identification.
Jian Zhao, Yuzhong Wang, Yanji Zhang, Sunlin Hu, Chao Liu   +4 more
openaire   +1 more source