Class information for:
Level 1: VANADYL PORPHYRINS//STERYL CHLORIN ESTERS//PETROPORPHYRINS

Basic class information
Class id #P Avg. number of
references		 Database coverage
of references
15383 715 30.5 46%


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
18 4 THERMODYNAMICS//ENERGY & FUELS//ENGINEERING, CHEMICAL 531182
381 3       FUEL//HYDRODESULFURIZATION//ENERGY & FUELS 31814
3064 2             OIL SHALE//OIL SHALE ASH//VANADYL PORPHYRINS 2426
15383 1                   VANADYL PORPHYRINS//STERYL CHLORIN ESTERS//PETROPORPHYRINS 715

Terms with highest relevance score


rank Term termType Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with
term in
class
1 VANADYL PORPHYRINS authKW 649569 2% 89% 17
2 STERYL CHLORIN ESTERS authKW 341644 1% 100% 8
3 PETROPORPHYRINS authKW 266902 1% 63% 10
4 GEOPORPHYRINS authKW 261569 1% 88% 7
5 GEOCHEM COSMOCHEM address 246054 2% 52% 11
6 PYROPHAEOPHORBIDE A authKW 177938 1% 83% 5
7 DPEP authKW 128116 0% 100% 3
8 PYRROLE CHEMISTRY authKW 128116 0% 100% 3
9 ALKYL PORPHYRINS authKW 85411 0% 100% 2
10 BACTERIOCHLOROPHYLLS D authKW 85411 0% 100% 2

Web of Science journal categories


Rank Term Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with
term in
class
1 Geochemistry & Geophysics 4498 22% 0% 160
2 Energy & Fuels 2171 18% 0% 130
3 Engineering, Petroleum 1445 5% 0% 33
4 Engineering, Chemical 1222 18% 0% 130
5 Chemistry, Organic 916 17% 0% 124
6 Chemistry, Analytical 540 13% 0% 93
7 Chemistry, Multidisciplinary 420 18% 0% 129
8 Spectroscopy 263 6% 0% 42
9 Biochemical Research Methods 86 5% 0% 33
10 Limnology 34 1% 0% 7

Address terms


Rank Term Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with
term in
class
1 GEOCHEM COSMOCHEM 246054 2% 52% 11
2 CARL ICAHN 21 42705 0% 100% 1
3 CIENCIAS 1A 42705 0% 100% 1
4 COORDINAC CRUDO MAYA 42705 0% 100% 1
5 EJE CENT NORTE LAZARO 42705 0% 100% 1
6 ENVIRONM ENGN WATER OURCES GRP 42705 0% 100% 1
7 EQUILIBRIOS SOLUC ELE OQUIM 42705 0% 100% 1
8 FLOSSIL FUELS ENVIRONM GEOCHEM 42705 0% 100% 1
9 PHYS ANAL DIRECT 42705 0% 100% 1
10 POS CIENCIAS QUIM FQ 42705 0% 100% 1

Journals


Rank Term Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with
term in
class
1 ORGANIC GEOCHEMISTRY 81809 12% 2% 88
2 ENERGY & FUELS 10427 8% 0% 54
3 PETROLEUM CHEMISTRY 7407 3% 1% 18
4 GEOKHIMIYA 6805 3% 1% 22
5 FUEL SCIENCE & TECHNOLOGY INTERNATIONAL 2963 1% 2% 4
6 GEOCHIMICA ET COSMOCHIMICA ACTA 2577 4% 0% 28
7 AUSTRALIAN JOURNAL OF CHEMISTRY 2544 3% 0% 21
8 FUEL 2380 4% 0% 29
9 VISION TECNOLOGICA 1608 0% 2% 2
10 CHEMICAL GEOLOGY 1431 2% 0% 16

Author Key Words


Rank Term Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with
term in
class		 LCSH search Wikipedia search
1 VANADYL PORPHYRINS 649569 2% 89% 17 Search VANADYL+PORPHYRINS Search VANADYL+PORPHYRINS
2 STERYL CHLORIN ESTERS 341644 1% 100% 8 Search STERYL+CHLORIN+ESTERS Search STERYL+CHLORIN+ESTERS
3 PETROPORPHYRINS 266902 1% 63% 10 Search PETROPORPHYRINS Search PETROPORPHYRINS
4 GEOPORPHYRINS 261569 1% 88% 7 Search GEOPORPHYRINS Search GEOPORPHYRINS
5 PYROPHAEOPHORBIDE A 177938 1% 83% 5 Search PYROPHAEOPHORBIDE+A Search PYROPHAEOPHORBIDE+A
6 DPEP 128116 0% 100% 3 Search DPEP Search DPEP
7 PYRROLE CHEMISTRY 128116 0% 100% 3 Search PYRROLE+CHEMISTRY Search PYRROLE+CHEMISTRY
8 ALKYL PORPHYRINS 85411 0% 100% 2 Search ALKYL+PORPHYRINS Search ALKYL+PORPHYRINS
9 BACTERIOCHLOROPHYLLS D 85411 0% 100% 2 Search BACTERIOCHLOROPHYLLS+D Search BACTERIOCHLOROPHYLLS+D
10 CHLOROPHYLL A TRANSFORMATION PRODUCTS 85411 0% 100% 2 Search CHLOROPHYLL+A+TRANSFORMATION+PRODUCTS Search CHLOROPHYLL+A+TRANSFORMATION+PRODUCTS

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.


Rank Reference # ref.
in cl.		 Shr. of ref. in
cl.		 Citations
1 LASH, TD , LI, W , QUIZON-COLQUITT, DM , (2007) PORPHYRINS WITH EXOCYCLIC RINGS. PART 22: SYNTHESIS OF DEOXOPHYLLOERYTHROETIOPORPHYRIN (DPEP), THREE RING HOMOLOGUES, AND FIVE RELATED NONPOLAR BACTERIOPETROPORPHYRINS USING A WESTERN RING CLOSURE AND AN IMPROVED B-BILENE METHODOLOGY.TETRAHEDRON. VOL. 63. ISSUE 50. P. 12324 -12342 69 82% 6
2 ZHAO, X , XU, CM , SHI, Q , (2016) PORPHYRINS IN HEAVY PETROLEUMS: A REVIEW.STRUCTURE AND MODELING OF COMPLEX PETROLEUM MIXTURES. VOL. 168. ISSUE . P. 39 -70 59 65% 1
3 SHINER, CM , LASH, TD , (2005) PORPHYRINS WITH EXOCYCLIC RINGS. PART 21: INFLUENCE OF PYRROLIC AND CARBOCYCLIC RING ALKYL SUBSTITUENTS ON THE SYNTHESIS OF PORPHYRINS BEARING SIX-MEMBERED EXOCYCLIC RINGS.TETRAHEDRON. VOL. 61. ISSUE 49. P. 11628 -11640 43 88% 67
4 SMITH, BE , LASH, TD , (2010) PORPHYRINS WITH EXOCYCLIC RINGS. PART 25: SYNTHESIS OF PORPHYRINS WITH A FUSED CYCLIC ETHER SUBUNIT FROM TETRAHYDRO-4H-PYAN-4-ONE.TETRAHEDRON. VOL. 66. ISSUE 25. P. 4413 -4422 46 75% 8
5 KASHIYAMA, Y , KITAZATO, H , OHKOUCHI, N , (2007) AN IMPROVED METHOD FOR ISOLATION AND PURIFICATION OF SEDIMENTARY PORPHYRINS BY HIGH-PERFORMANCE LIQUID CHROMATOGRAPHY FOR COMPOUND-SPECIFIC ISOTOPIC ANALYSIS.JOURNAL OF CHROMATOGRAPHY A. VOL. 1138. ISSUE 1-2. P. 73 -83 40 93% 13
6 WOLTERING, M , TULIPANI, S , BOREHAM, CJ , WALSHE, J , SCHWARK, L , GRICE, K , (2016) SIMULTANEOUS QUANTITATIVE ANALYSIS OF NI, VO, CU, ZN AND MN GEOPORPHYRINS BY LIQUID CHROMATOGRAPHY-HIGH RESOLUTION MULTISTAGE MASS SPECTROMETRY: METHOD DEVELOPMENT AND VALIDATION.CHEMICAL GEOLOGY. VOL. 441. ISSUE . P. 81 -91 34 74% 0
7 LASH, TD , CATARELLO, JJ , (1993) PORPHYRINS WITH EXOCYCLIC RINGS .3. A REASSESSMENT ON THE UTILITY OF CYCLOPENTA[B]PYRROLES IN THE SYNTHESIS OF PORPHYRIN MOLECULAR FOSSILS - PREPARATION OF 3 TYPE-II PORPHYRINS RELATED TO DEOXOPHYLLOERYTHROETIOPORPHYRIN (DPEP).TETRAHEDRON. VOL. 49. ISSUE 20. P. 4159-4172 45 90% 12
8 LASH, TD , QUIZONCOLQUITT, DM , SHINER, CM , NGUYEN, TH , HU, Z , (1993) RECENT ADVANCES IN THE SYNTHESIS OF PORPHYRINS WITH 5-MEMBERED EXOCYCLIC RINGS.ENERGY & FUELS. VOL. 7. ISSUE 2. P. 172-178 43 91% 10
9 QIAN, KN , EDWARDS, KE , MENNITO, AS , WALTERS, CC , KUSHNERICK, JD , (2010) ENRICHMENT, RESOLUTION, AND IDENTIFICATION OF NICKEL PORPHYRINS IN PETROLEUM ASPHALTENE BY CYCLOGRAPH SEPARATION AND ATMOSPHERIC PRESSURE PHOTOIONIZATION FOURIER TRANSFORM ION CYCLOTRON RESONANCE MASS SPECTROMETRY.ANALYTICAL CHEMISTRY. VOL. 82. ISSUE 1. P. 413-419 24 86% 31
10 JUNIUM, CK , FREEMAN, KH , ARTHUR, MA , (2015) CONTROLS ON THE STRATIGRAPHIC DISTRIBUTION AND NITROGEN ISOTOPIC COMPOSITION OF ZINC, VANADYL AND FREE BASE PORPHYRINS THROUGH OCEANIC ANOXIC EVENT 2 AT DEMERARA RISE.ORGANIC GEOCHEMISTRY. VOL. 80. ISSUE . P. 60 -71 32 56% 2

Classes with closest relation at Level 1


Rank Class id link
1 23683 SYNTH ANAL//TETRABENZOPORPHYRIN//RETRO DIELS ALDER REACTION
2 16902 CHEMTAX//CHLOROPHYLL C PIGMENTS//CONSELLERIA PESCA
3 10735 CHLOROSOME//BACTERIOCHLOROPHYLL C//BACTERIOCHLOROPHYLL
4 12395 EXTRACTION INDUCED BY EMULSION BREAKING//WEAR METALS//DERIVATIVE POTENTIOMETRIC STRIPPING ANALYSIS
5 28524 CHEM ENGN CHEM TECHNOL//COAL DERIVATIVES//FLOWING SOLVENT REACTOR
6 33931 CHEMICAL TYPE OF OIL//ELEMENT ENRICHMENT FACTORS//MERCURY IN SOILS
7 8473 HYDROCRACKING//HYDRODEMETALLIZATION//HYDRODEMETALLATION
8 1196 ORGANIC GEOCHEMISTRY//OIL SOURCE CORRELATION//STERANES
9 9325 CHLORIN//BACTERIOCHLORIN//METHYL PYROPHEOPHORBIDE A
10 29573 PHAEOPHYTINS//ABUTILON INDICUM//WISSADULA PERIPLOCIFOLIA

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