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Environmental Studies Using the Tecan QC Kit and an Automated Liquid Handling System
George Rodrigues, Emily Avis, Alf Price, Verena Gerber

The study illustrates the effect of two environmental factors (air temperature and humidity) on the volumetric performance of a Tecan Freedom EVO ® pipetting robot, equipped with a liquid LiHa (Liquid Handling Arm). Tecan recommends that the EVO be installed in a controlled environment. However, some users choose to operate in less controlled conditions.

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A pico-liter semi-automated screening method for morphological identification of microorganisms from environmental samples
Ms. Charmi Chande, Dr. Ravindra Phadke

An economically feasible microfabrication protocol was developed for fabricating micro features used for bacterial analysis from environmental samples like soil and green sulfur bacteria sample. Organisms were classified in 11 morphotypes by using open source Image analysis software named CMEIAS and the standardized protocol was confirmed by viable count and pure culture study

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Busted! First Detection of Steroid Hormones in Pacific Walrus Bones
Charapata P, Horstmann L, and Misarti N

The Pacific walrus (Odobenus rosmarus divergens) is a candidate species for the Endangered Species List because Arctic sea ice has declined significantly in the past decades. This project focuses on validating a method for extracting steroid hormones from archaeological, historical, and modern bone creating a baseline of hormone levels during different climate regimes.

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Experimental Evolution in Diatoms - Thermal longterm acclimation in two model diatom species
Katrin Schmidt1, Sinéad Collins2, Thomas Mock1

Experimental Evolution in two model Diatoms

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METHOD DEVELOPMENT FOR THE SIMULTANEOUS DETERMINATION OF METHYLMERCURY AND INORGANIC MERCURY IN SEAFOOD
Sergio Carneado, Ariane V. Zmozinski, Carmen Ibáñez-Palomino, Àngels Sahuquillo, José Fermín López-Sánchez, Márcia M. da Silva

This work reports the method development for the simultaneous determination of methylmercury (MeHg+) and inorganic mercury (iHg) species in seafood. The study focused on the extraction and quantification of MeHg+ by liquid chromatography coupled to on-line UV irradiation and cold vapour atomic fluorescence spectroscopy (LC-UV-HG-AFS), using HCl 4 mol L-1 as extractant agent.

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Relationships between Water Quality Constituents in the Delta and the Influence of Different Sources of Water
Richard A. Denton and Paul Hutton

Analysis of detailed grab sample data from San Francisco Bay and Delta and development of regression relationships between EC, TDS and water quality constituents such as chloride, bromide, sodium, calcium, sulfate, alkalinity and hardness. The relationships in the interior Delta vary depending upon the percentage contributions from seawater, agricultural drainage and freshwater inflows.

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Microextraction techniques combined with X-ray fluorescence spectrometry for determination of different metal ions in water
Karina Kocot (a), Beata Zawisza (a), Eva Marguí (b), Ignasi Queralt (c), Rafal Sitko (a)

In present work new preconcentration procedures combining microextraction techniques and X-ray fluorescence spectroscopy were developed. Proposed methodologies are promising tools for multielemental analysis enabling detection of natural pollutants in different water samples.

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Effects of aquaculture effluents on nitrogen characteristics in two Chinese estuaries
David Kaiser, Lucia S. Herbeck

The poster describes similarities and differences of the effects aquaculture effluents have on the nitrogen composition in estuarine waters of two sites in southern China

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APPLICATION OF LIQUID CHROMATOGRAPHY WITH UV DETECTION FOR DETERMINATION OF PLANT GROWTH REGULATOR IN COMMON PLANT FERTILIZERS
Borowczyk K., Wyszczelska-Rokiel M., Stachniuk J., Chwatko G., Glowacki R.

1. The methodology allows facile and accurate determination of IBA in common plant fertilizer samples.
2. The analytical figures of linearity, precision and recovery shown during the method validation procedure are well within the criteria for biological sample analysis.
3. In temperature -18, 4 and 25 °C the analyte stays stable for 6 h.
4. The assay should help in control of phytohormones concentration in plants and fertilizers.

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Showing Results 11 - 20 of 48
Scientific News
Low-level Arsenic Exposure Before Birth Associated with Early Puberty in Female Mice
Study examine whether low-dose arsenic exposure could have similar health outcomes in humans.
Intensity of Desert Storms May Affect Ocean Phytoplankton
MIT study finds phytoplankton are extremely sensitive to changing levels of desert dust.
Determination of Phosphate in Soil Extracts in the Field: A Green Chemistry Enzymatic Method
New method for phosphate determination which can be carried out in the field to obtain results on the spot.
Open-Source Photometric System for Enzymatic Nitrate Quantification
New method proposed for developing a cheaper, more accessible open-source water testing platform capable of performing Nitrate Reductase Nitrate-Nitrogen Analysis.
Toxic Algae is a Threat to Our Water
A report concludes that blooms of toxic cyanobacteria, or blue-green algae, are a poorly monitored and underappreciated risk to recreational and drinking water quality in the U.S., and may increasingly pose a global health threat.
Significant Part of Greenhouse Gas Emissions Comes From River and Sea Organisms
Running streams are key sources of the greenhouse gas carbon dioxide, but why is it so?
Better Estimates of Worldwide Mercury Pollution
New findings show Asia produces twice as much mercury emissions as previously thought.
Real-Time Data for Cancer Therapy
Biochemical sensor implanted at initial biopsy could allow doctors to better monitor and adjust cancer treatments.
New Biosensors for Managing Microbial ‘Workers’
Researchers at Harvard’s Wyss Institute have unveiled new biosensors that enable scientists to more effectively control and 'communicate with' engineered bacteria.
Playing 'Tag' with Pollution lets Scientists See Who's It
Using a climate model that can tag sources of soot from different global regions and can track where it lands on the Tibetan Plateau, researchers have determined which areas around the plateau contribute the most soot — and where.
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