Results 31 to 40 of about 11,031 (219)
Characteristics of multiple‐year nitrous oxide emissions from conventional vegetable fields in southeastern China [PDF]
The annual and interannual characteristics of nitrous oxide (N2O) emissions from conventional vegetable fields are poorly understood. We carried out 4 year measurements of N2O fluxes from a conventional vegetable cultivation area in the Yangtze River ...
Deng, Jia +9 more
core +2 more sources
A method for the determination of organochlorine pesticides in the water samples by gas chromatography is described. The method consists of sorption of pesticides in water by Mn02 sorbent with a water: Chloroform (10:1, V/V) mixture.
Lê Ngọc Chung +1 more
doaj +1 more source
Determination of Quintozene Residues in Agricultural Commodities Using GC-ECD/MS [PDF]
Abstract Quintozene, pentachloronitrobenzene (PCNB) is a contact fungicide for control of soilbornephytopathogenic fungi during cultivation of diverse crops. It was introduced to agricultural use around 1930’sas a substitute for mercurial disinfectants. Although quintozene had been first registered in Korea on 1969.However, now it was banned to use due
Kyung-Geun Ahn +6 more
openaire +1 more source
Summertime partitioning and budget of NOycompounds in the troposphere over Alaska and Canada: ABLE 3B [PDF]
As part of NASA's Arctic Boundary Layer Expedition 3A and 3B field measurement programs, measurements of NO(x) HNO31, PAN, PPN, and NOy were made in the middle to lower troposphere over Alaska and Canada during the summers of 1988 and 1990.
Anderson, B +16 more
core +1 more source
The objective of this study was to optimize and validate a solid-liquid extraction method with low-temperature partitioning (SLE/LTP) for the analysis of pesticides.
Romenique da Silva de Freitas +4 more
doaj +1 more source
Rapid determination of methylmercury in fish tissues
The aim of the present study was to develop a rapid and inexpensive method for the determination of methylmercury in fish tissues based on GC/ECD instrumentation.
Petr Maršálek, Zdeňka Svobodová
doaj +1 more source
Chemical NOx budget in the upper troposphere over the tropical South Pacific [PDF]
The chemical NOx budget in the upper troposphere over the tropical South Pacific is analyzed using aircraft measurements made at 6-12 km altitude in September 1996 during the Global Tropospheric Experiment (GTE) Pacific Exploratory Mission (PEM) Tropics ...
Bradshaw, J D +6 more
core +2 more sources
In this work the exposure of wells and surface water to pesticides, commonly used for tobacco cropping, was assessed. Water consumption wells and surface water flows were sampled at different times.
Edson C. Bortoluzzi +7 more
doaj +1 more source
Effect of chloride on the chemical conversion of nitrate to nitrous oxide for δ15N analysis [PDF]
We investigate the influence of chloride concentration on the performance of the chemical reduction method for measurement of the nitrogen isotopic ratio (δ15N) in NO3− in natural waters (McIlvin and Altabet, 2005).
Altabet, Mark A. +2 more
core +1 more source
Pyrolysis of brominated feedstock plastic in a fluidised bed reactor [PDF]
Fire retarded high impact polystyrene has been pyrolysed using a fluidised bed reactor with a sand bed. The yield and composition of the products have been investigated in relation to fluidised bed temperature.
Bhaskar +10 more
core +1 more source

