Class information for:
Level 1: FORMALDEHYDE//2 4 DINITROPHENYLHYDRAZINE//FORMALDEHYDE DETERMINATION

Basic class information
Bar chart of Publication_year

Last years might be incomplete

Hierarchy of classes
The table includes all classes above and classes immediately below the current class.


Cluster id Level Cluster label #P
3 4 GEOSCIENCES, MULTIDISCIPLINARY//GEOCHEMISTRY & GEOPHYSICS//METEOROLOGY & ATMOSPHERIC SCIENCES 1953906
16 3       METEOROLOGY & ATMOSPHERIC SCIENCES//ATMOSPHERIC ENVIRONMENT//JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 126179
1575 2             ISOPRENE//BIOGENIC EMISSIONS//VOLATILE ORGANIC COMPOUNDS 7519
5676 1                   FORMALDEHYDE//2 4 DINITROPHENYLHYDRAZINE//FORMALDEHYDE DETERMINATION 1619

Terms with highest relevance score


rank Category termType chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 FORMALDEHYDE authKW 810514 24% 11% 393
2 2 4 DINITROPHENYLHYDRAZINE authKW 330697 3% 36% 47
3 FORMALDEHYDE DETERMINATION authKW 273726 1% 94% 15
4 CARBONYL COMPOUNDS authKW 206721 7% 9% 112
5 DNPH authKW 191096 1% 55% 18
6 FLUORAL P authKW 124574 0% 80% 8
7 CARBONYLS authKW 120800 3% 13% 48
8 PFBHA authKW 98534 1% 56% 9
9 ABT ANALYT CHEM address 97807 1% 36% 14
10 FORMALDEHYDE IN AIR authKW 97326 0% 100% 5

Web of Science journal categories


chi_square_rank Category chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 Chemistry, Analytical 22015 50% 0% 807
2 Environmental Sciences 4492 27% 0% 430
3 Meteorology & Atmospheric Sciences 2961 13% 0% 203
4 Biochemical Research Methods 2291 13% 0% 214
5 Engineering, Environmental 1009 7% 0% 111
6 Food Science & Technology 232 5% 0% 89
7 Electrochemistry 191 4% 0% 58
8 Instruments & Instrumentation 156 4% 0% 64
9 Spectroscopy 109 3% 0% 47
10 Chemistry, Applied 62 3% 0% 43

Address terms


chi_square_rank term chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 ABT ANALYT CHEM 97807 1% 36% 14
2 BRANCH CAMPUS BIOTECHNOL 38930 0% 100% 2
3 GD UTILIZAT PROTECT ENVIRONM OURCES 38930 0% 100% 2
4 SCI TECHNOL TRANSFER 38930 0% 100% 2
5 UPR 5151 38930 0% 100% 2
6 CELL REGULATORY SYST 34753 0% 36% 5
7 GRP ATMOSPHER PHYS CHEM 25952 0% 67% 2
8 GUANGZHOU ENVIRONM PROTECT OURCES UT 25952 0% 67% 2
9 JOINT PROGRAM EXPOSURE SCI 25952 0% 67% 2
10 JOINT PROGRAM EXPOSURE ASSESSMENT 21895 0% 38% 3

Journals


chi_square_rank term chi_square shrOfCwithTerm shrOfTermInClass termInClass
1 ATMOSPHERIC ENVIRONMENT 9602 6% 1% 93
2 AMERICAN INDUSTRIAL HYGIENE ASSOCIATION JOURNAL 7865 2% 1% 31
3 JOURNAL OF CHROMATOGRAPHY A 4905 5% 0% 84
4 INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY 4554 2% 1% 28
5 TALANTA 4098 4% 0% 61
6 ANALYTICA CHIMICA ACTA 3261 4% 0% 65
7 CHROMATOGRAPHIA 2691 2% 0% 35
8 ENVIRONMENTAL SCIENCE & TECHNOLOGY 2406 4% 0% 61
9 ANALYST 2240 3% 0% 42
10 BUNSEKI KAGAKU 2196 2% 0% 26

Author Key Words


chi_square_rank term chi_square shrOfCwithTerm shrOfTermInClass termInClass LCSH search Wikipedia search
1 FORMALDEHYDE 810514 24% 11% 393 Search FORMALDEHYDE Search FORMALDEHYDE
2 2 4 DINITROPHENYLHYDRAZINE 330697 3% 36% 47 Search 2+4+DINITROPHENYLHYDRAZINE Search 2+4+DINITROPHENYLHYDRAZINE
3 FORMALDEHYDE DETERMINATION 273726 1% 94% 15 Search FORMALDEHYDE+DETERMINATION Search FORMALDEHYDE+DETERMINATION
4 CARBONYL COMPOUNDS 206721 7% 9% 112 Search CARBONYL+COMPOUNDS Search CARBONYL+COMPOUNDS
5 DNPH 191096 1% 55% 18 Search DNPH Search DNPH
6 FLUORAL P 124574 0% 80% 8 Search FLUORAL+P Search FLUORAL+P
7 CARBONYLS 120800 3% 13% 48 Search CARBONYLS Search CARBONYLS
8 PFBHA 98534 1% 56% 9 Search PFBHA Search PFBHA
9 FORMALDEHYDE IN AIR 97326 0% 100% 5 Search FORMALDEHYDE+IN+AIR Search FORMALDEHYDE+IN+AIR
10 O 2 3 4 5 6 PENTAFLUOROBENZYLHYDROXYLAMINE 97326 0% 100% 5 Search O+2+3+4+5+6+PENTAFLUOROBENZYLHYDROXYLAMINE Search O+2+3+4+5+6+PENTAFLUOROBENZYLHYDROXYLAMINE

Core articles
The table includes core articles in the class. The following variables is taken into account for the relevance score of an article in a cluster c:
(1) Number of references referring to publications in the class.
(2) Share of total number of active references referring to publications in the class.
(3) Age of the article. New articles get higher score than old articles.
(4) Citation rate, normalized to year.

Classes with closest relation at Level 1


rank cluster_id2 link
1 24819 ATMOSPHERIC CARBOXYLIC ACIDS//CAS COASTAL ENVIRONM PROC//QUIM ATMOSFER
2 9341 FORMALDEHYDE//DNA PROTEIN CROSS LINKS//FORMALDEHYDE INHALATION
3 5619 INDOOR CHEMISTRY//INDOOR AIR//INDOOR AIR QUALITY
4 2386 OZONE FORMATION POTENTIAL//NON METHANE HYDROCARBONS//VOLATILE ORGANIC COMPOUNDS
5 29061 CATALUMINESCENCE//ENERGY BLDG ENVIRONM ENGN//CATALUMINESCENCE CTL
6 32103 BIOMED DEVICES RUMENTAT//TEAR GLUCOSE//BIO SNIFFER
7 29461 TMAOASE//TRIMETHYLAMINE N OXIDE DEMETHYLASE//DRIED SEASONED SQUID
8 23523 BIOARENA//FORMALDEMETHONE//DIRECT BIOAUTOGRAPHY
9 18539 MALONALDEHYDE//MALONDIALDEHYDE//MALONDIALDEHYDE DETERMINATION
10 20150 PASSIVE SAMPLER//DIFFUSION TUBES//TAPE MONITOR

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