tracking
tracking, streaming A widespread practice in American elementary and secondary school systems, tracking attempts to homogenize classrooms by placing students according to a range of criteria which may include pupils' performances on standardized aptitude tests, classroom performance, perceived personal qualities and aspirations, and social class and ethnic origin. Different tracks typically offer different curricula, types of student–teacher relationship, and educational resources. The higher college tracks have been found to be more intellectually demanding, with better resources, and more favourable teacher expectations of pupils. Studies have highlighted the implications of tracking in terms of its negative psychological consequences for those placed in the lower tracks, reinforcement of ethnic and social class segregation, and perpetuation of inequality in society. The practice, issues, and debates have their British equivalent in the system of so-called streaming.
Cite this article
Pick a style below, and copy the text for your bibliography.
|
Concentrated nitric acid demand increases steadily.
Magazine article from: China Chemical Reporter; 5/26/2006; ; 700+ words
; ...around 40 concentrated nitric acid producers in China today...of concentrated nitric acid in China has increased...consumption of concentrated nitric acid reached 1.5616...has made small-tonnage nitric acid tank cars hard to gain...
|
|
Retrofitting nitric acid and ammonium nitrate plants: though no fundamentally radical changes have taken place in nitric acid and ammonium nitrate technology in the past decade, there are still many older plants which could benefit from retrofitting to bring them up to modern standards of efficiency and cleanliness.(Revamping)
Magazine article from: Nitrogen & Methanol; 9/1/2004; 700+ words
; A decade or so ago nitric acid and ammonium nitrate production technologies had...from a peculiarity in nitrogen oxides chemistry. Nitric oxide itself does not react with water. The nitric acid is formed by the reaction of nitrogen dioxide...
|
|
Nitric acid price anomalies.(Inorganics)
Magazine article from: China Chemical Reporter; 8/26/2008; ; 700+ words
; The price of concentrated nitric acid in the domestic market increased...production enthusiasm of concentrated nitric acid producers is fully mobilized...and low price in the concentrated nitric acid market from 2006 to 2007, investors...
|
|
How can nitric acid producer manage itself?(Inorganics)
Magazine article from: China Chemical Reporter; 2/6/2008; 700+ words
; ...the price of concentrated nitric acid went down in the golden...period for concentrated nitric acid. (b) The negative...of sales (Some nitric acid producers even refuse to...only in the concentrated nitric acid sector but also in...
|
|
Concentrated nitric acid market: basic supply and demand balance in future. (Inorganics).(Illustration)(Industry Overview)
Magazine article from: China Chemical Reporter; 5/16/2003; ; 700+ words
; ...production of concentrated nitric acid has developed rapidly...of concentrated nitric acid in the domestic market...expansion of concentrated nitric acid in Anhui Huaihua...development of concentrated nitric acid production in recent years...
|
|
Merchant nitric acid pricing moves independently of ammonia's influence.
Magazine article from: Chemical Market Reporter; 10/6/1997; 700+ words
; ...merchant market for strong nitric acid (98 percent), price...he says. Strong nitric acid, or as it is sometimes called, concentrated nitric acid, is a steady and...uses for concentrated nitric acid are the nitration of chlorobenzene...
|
|
Identify Market Opportunities for the Nitric Acid in China.
Business Wire; 11/16/2007; 700+ words
; ...in its catalogue. China Nitric Acid Industry Report, 2007...p063246/PRBW-China-Nitric-Acid.html For more...production capacity of nitric acid industry will exceed 1...development trend of China nitric acid industry, the excessive...
|
|
Forecast: China's concentrated nitric acid demand in 1993
Magazine article from: China Chemical Reporter; 1/1/1993; 700+ words
; Nitric acid is an important inorganic...Production situation China's nitric acid industry has developed...enterprise for concentrated nitric acid production, and its output...started exporting concentrated nitric acid at the beginning of the...
|
|
DOMESTIC DEMAND FOR NITRIC ACID MET LOCALLY
Magazine article from: Indonesian Commercial Newsletter; 1/11/1993; 700+ words
; ...Nowadays, Indonesia has been able to produce nitric acid to meet domestic demand. Because of this, Indonesia's nitric acid imports have shown the tendency to decline. Nitric acid is a petrochemical product made from...
|
|
Non-fertilizer uses of nitric acid: nitric acid is one of the basic chemical building blocks of the nitrogenous fertilizer industry, used in ammonium nitrate and nitrogen solutions as well as various NPK compounds. However, it is also a feedstock for a number of other chemical processes.(Nitric Acid)
Magazine article from: Nitrogen & Methanol; 9/1/2004; 700+ words
; Nitric acid is mostly produced as 'weak...up to 13bar. Uses Nitric acid is used mostly for the production...fertilizers: around 80% of nitric acid is used in fertilizer...Declining use World demand for nitric acid will continue to be largely...
|
|
nitric acid
Book article from: The Columbia Encyclopedia, Sixth Edition
nitric acid chemical compound, HNO 3 , colorless...nitrate with sulfuric acid. Nitric acid was known to the alchemists as aqua...it. Aqua regia is a mixture of nitric and hydrochloric acids. Niric acid is a component of acid rain .
|
|
nitric oxide
Book article from: The Columbia Encyclopedia, Sixth Edition
...and destroy vegetation. Large amounts of nitric oxide are created by internal-combustion...nitrogen and oxygen gases. In the environment, nitric oxide is a precursor of smog and acid rain . Nitric oxide in minute amounts serves as a source...
|
|
acid rain
Book article from: A Dictionary of Biology
...carbon dioxide (forming carbonic acid). Acid rain results from the emission into...atmospheric water to form sulphuric and nitric acids in rain, snow, or hail ( wet deposition...dry deposition ). Both types of acid deposition affect plant growth...
|
|
Acid-Base Chemistry
Book article from: Chemistry: Foundations and Applications
...bases are weak COMMON ACIDS AND BASES Strong Acids Strong Bases HCl hydrochloric acid NaOH sodium hydroxide HNO 3 nitric acid KOH potassium hydroxide H 2 SO 4 sulfuric acid Ba(OH) 2 barium hydroxide Weak Acids Weak Bases CH 3 COOH acetic...
|
|
Acid Rain
Book article from: Water:Science and Issues
...major categories of emission sources. Acid rain is a regional problem because prevailing...nitrogen compounds is commonly known as acid rain, although it also takes the form...Wet deposition is intermittent because acids reach the Earth only when precipitation...Nevertheless, it can be the primary ...
|