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Atmospheric deposition of nitrogen and sulphur in relation to critical loads of nitrogen and acidity in the Czech Republic
acidity atmospheric deposition
2015/3/3
Estimates of dry and wet deposition of sulphur and nitrogen were compared with critical loads of sulphur
and nitrogen in the Czech Republic on 1 ×1 km grid. Deposition was estimated from monitored a...
Problems of the statistical evidence of feedbacks between forest herb phytocoenoses and soil acidity at pollution load
substitute stands phytocoenosis bioindication trophic series soil acidity
2015/2/2
Emissions and ecological factors are evident in changes of dynamics of global forest ecosystems. Specific develop-ment takes place in these substitute stands on contaminated and devastated plots. The ...
Effect of thickening agents on perceived viscosity and acidity of model beverages
sensory evaluation acid taste cellulose derivatives model samples viscosimeter
2014/2/25
The effect of thickening agents – methyl cellulose, hydroxyethyl cellulose, sodium carboxymethyl cellulose, and xanthan gum – solutions on the sensory viscosity was investigated in the concentration r...
Synthesis and spectrophotometric determination of acidity constants of 2,3,4,6'-tetrahydroxy-3'-sulfoazobenzene and their use in determination of aluminum
Azo dye acidity constants aluminum spectrophotometric determination
2011/4/6
A novel azo derivative, 2,3,4,6'-tetrahydroxy-3'-sulfoazobenzene (THSA), was synthesized by using pyrogallol. The acid dissociation constants, or Ka values, of THSA were determined by the UV-visible s...
Impact of the East Asian summer monsoon on long-term variations in the acidity of summer precipitation in Central China
the East Asian summer monsoon long-term variations the acidity of summer precipitation Central China
2011/2/25
The acidity of precipitation has been observed at stations of the Acid Rain Monitoring Network run by the China Meteorological Administration (CMA-ARMN) since 1992. Previous studies have shown that di...
Effect of Turning Beans and Fermentation Method on the Acidity and Physical Quality of Raw Cocoa Beans
Beans cocoa fermentation quality
2010/9/30
This study concerns the influence of turning and fermentation method on quality of raw cocoa.
Fermentation trials were conducted in wooden box, plastic box and in heaps with or not turning. Cocoa fer...
Pore structure and surface acidity evaluation of Fe-PILCs
Pillared clays delaminated clays characterisation surface area surface acidity
2010/4/8
Fe-PILCs via different conditions using smectites from Hancili (Turkey) and Wyoming (USA) were synthesised. Presaturation had little effects on the basal spacing values while it had important effects ...
Relationships between Precipitation Chemistry,Hydrology,and Runoff Acidity
Relationships Precipitation Chemistry Hydrology Runoff Acidity
2009/10/28
High precipitation amounts of strongly varying ionic composition make the
western parts of southern Norway well-suited for studies of certain relationships
between precipitation chemistry, hydrology...
Modelling the Effects of Acid Sulphate Soils on River Acidity in Finland
Effects of Acid Sulphate Soils River Acidity
2009/10/26
Acid sulphate (AS) soils cover extensive areas of the coastal plains in western
Finland. These soils constitute an environmental hazard due to their ability to
relcase acidity when exposed to atmosp...
Combined Method of Ammonia IRMS-TPD Experiment and DFT Calculation to Characterize Zeolite Acidity
Zeolite Acidity Temperature programmed desorption Infrared spectroscopy Density functional theory Catalytic cracking
2010/9/8
Our recently developed potential characterization method for studying the zeolite acidity is reviewed. In this method, ammonia TPD is a principle technique and first the principle of the method was ex...
基于色调分形维数的柑橘糖度和有效酸度检测（Sugar Content and the Valid Acidity Test of the Citrus Based on the Fractal Dimensions of Hue）
柑橘 糖度 有效酸度 机器视觉 无损检测 色调 分形维数
2010/4/1
研究了宫川温州蜜柑糖度及有效酸度的机器视觉检测技术及影响检测精度的因素。对机器视觉系统采集的柑橘图像进行图像裁切、亮度法去图像背景和RGB空间至HSI空间的转换，将柑橘色调范围分割为0°～20°、20°～40°、40°～60°、60°～80°、80°～100°和100°～120°共6个区域，提取各区域色调分形维数，以此作为BP神经网络输入，无损检测宫川温州蜜柑糖度及有效酸度。167个测试样本的检测...
Development of Pt/WO3-ZrO2-Al2O3 Catalyst for Isomerization of Normal Heptane (Part 1) Control of Catalyst Acidity to Improve Isomerization Selectivity
Isomerization Normal heptane Solid super acid Research octane number
2009/7/28
The skeletal isomerization of paraffins is effective in improving the gasoline octane number, and platinum catalyst supported on sulfated zirconia (SZ) has been practically used for light naphtha iso...
Sensibility of two hairy vetch (Vicia villosa Roth.) genotypes to soil acidity
Vicia villosa sensibility pH substrates germination rate toleration
2010/1/19
Vetches are grown for pastures and mixtures with grain for forage. Hairy vetch is a
legume primarily used for soil improvement and bank stabilization, is well adapted to organic
cultivation and gr...
Analysis of the impacts of major anion variations on surface water acidity particularly with regard to conifer harvesting：case studies from Wales and Northern England
surface water acidity Wales Northern England
2009/6/5
Data on the water quality of streams draining a range of acidic and acid sensitive, mainly afforested, upland catchments in mid- and north-Wales and northern-England are described to investigate the a...
Critical loads of sulphur and nitrogen for freshwaters in Great Britain and assessment of deposition reduction requirements with the First-order Acidity Balance (FAB) model
critical loads acidification nitrate FAB model
2009/3/24
The critical loads approach is widely used within Europe to assess the impacts of acid deposition on terrestrial and freshwater ecosystems.