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D-Index & Metrics

Discipline name D-Index World Ranking National Ranking Publications Citations
Chemistry 64 7930 2301 189 19759

Jan Almlöf publications per year

The chart shows the history of publications by Jan Almlöf between 1971 and 2009, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Jan Almlöf published across 39 years, from 1971 to 2009, averaging 4.9 papers a year. Output peaked at 20 publications in 1982. 1 of the 192 publications appeared in the last two years.

No. of publications
5 10 15 20
Bar chart. Horizontal axis: year, 1971 to 2009. Vertical axis: number of publications, 0 to 20. Peak 20 publications in 1982. 1971: 4 publications 1972: 4 publications 1973: 5 publications 1974: 5 publications 1975: 9 publications 1976: 0 publications 1977: 1 publication 1978: 3 publications 1979: 2 publications 1980: 5 publications 1981: 8 publications 1982: 20 publications 1983: 3 publications 1984: 8 publications 1985: 4 publications 1986: 5 publications 1987: 6 publications 1988: 7 publications 1989: 10 publications 1990: 2 publications 1991: 20 publications 1992: 15 publications 1993: 7 publications 1994: 8 publications 1995: 9 publications 1996: 13 publications 1997: 3 publications 1998: 4 publications 1999: 0 publications 2000: 0 publications 2001: 0 publications 2002: 0 publications 2003: 0 publications 2004: 0 publications 2005: 0 publications 2006: 0 publications 2007: 1 publication 2008: 0 publications 2009: 1 publication
1971 2009

192 publications in total across all disciplines

View publications per year as a table
Jan Almlöf: publications per year, 1971 to 2009
Year Publications
1971 4
1972 4
1973 5
1974 5
1975 9
1976 0
1977 1
1978 3
1979 2
1980 5
1981 8
1982 20
1983 3
1984 8
1985 4
1986 5
1987 6
1988 7
1989 10
1990 2
1991 20
1992 15
1993 7
1994 8
1995 9
1996 13
1997 3
1998 4
1999 0
2000 0
2001 0
2002 0
2003 0
2004 0
2005 0
2006 0
2007 1
2008 0
2009 1
Total 192
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Jan Almlöf publications per year - data summary

  • Jan Almlöf, a Chemistry scholar from University of Minnesota, has 192 publications recorded across 39 years, from 1971 to 2009.
  • The oldest publication on record dates to 1971 and the most recent to 2009.
  • The most productive years are 1982 and 1991, with 20 publications each.
  • The least productive years with any output are 1977, 2007 and 2009, with 1 publication each.
  • 10 of the 39 years in the span carry no publications at all (1976, 1999, 2000, 2001 and others).
  • The rate of publication averages 4.9 papers per year over the whole span, or 6.6 per year counting only the 29 years with at least one publication.
  • The last 5 years on the chart (2005-2009) hold 2 publications, 1% of the career total.
  • Split into equal eras - 1971-1983: 69 publications (5.3 per year); 1984-1996: 114 publications (8.8 per year); 1997-2009: 9 publications (0.7 per year).
  • Comparing the opening and closing eras, the overall trend of publication is declining.

Jan Almlöf publication distribution in Chemistry in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Chemistry in 2026. The highlighted bar marks where Jan Almlöf sits on this spectrum.

No. of scientists
250 500 750 1,000 1,250
Bar chart with 63 bars. Horizontal axis: publications, 61–80 to 1,295+. Vertical axis: number of scientists, 0 to 1,350. Most scientists, 1,350, have 161–180 publications. The last bar groups every scientist with 1,295 publications or more. The highlighted bar, 181–200 publications, is where this scientist sits. 61–80 publications: 66 scientists 81–100 publications: 302 scientists 101–120 publications: 623 scientists 121–140 publications: 918 scientists 141–160 publications: 1,218 scientists 161–180 publications: 1,350 scientists 181–200 publications: 1,344 scientists 201–220 publications: 1,281 scientists 221–240 publications: 1,216 scientists 241–260 publications: 1,100 scientists 261–280 publications: 979 scientists 281–300 publications: 939 scientists 301–320 publications: 764 scientists 321–340 publications: 643 scientists 341–360 publications: 628 scientists 361–380 publications: 522 scientists 381–400 publications: 459 scientists 401–420 publications: 397 scientists 421–440 publications: 327 scientists 441–460 publications: 270 scientists 461–480 publications: 265 scientists 481–500 publications: 252 scientists 501–520 publications: 201 scientists 521–540 publications: 185 scientists 541–560 publications: 148 scientists 561–580 publications: 148 scientists 581–600 publications: 132 scientists 601–620 publications: 114 scientists 621–640 publications: 104 scientists 641–660 publications: 91 scientists 661–680 publications: 92 scientists 681–700 publications: 73 scientists 701–720 publications: 57 scientists 721–740 publications: 54 scientists 741–760 publications: 67 scientists 761–780 publications: 45 scientists 781–800 publications: 46 scientists 801–820 publications: 39 scientists 821–840 publications: 32 scientists 841–860 publications: 36 scientists 861–880 publications: 29 scientists 881–900 publications: 26 scientists 901–920 publications: 24 scientists 921–940 publications: 14 scientists 941–960 publications: 23 scientists 961–980 publications: 28 scientists 981–1,000 publications: 15 scientists 1,001–1,020 publications: 29 scientists 1,021–1,040 publications: 12 scientists 1,041–1,060 publications: 19 scientists 1,061–1,080 publications: 12 scientists 1,081–1,100 publications: 6 scientists 1,101–1,120 publications: 8 scientists 1,121–1,140 publications: 12 scientists 1,141–1,160 publications: 5 scientists 1,161–1,180 publications: 6 scientists 1,181–1,200 publications: 14 scientists 1,201–1,220 publications: 7 scientists 1,221–1,240 publications: 2 scientists 1,241–1,260 publications: 6 scientists 1,261–1,280 publications: 4 scientists 1,281–1,294 publications: 6 scientists 1,295+ publications: 100 scientists
61–80 publications 1,295+

This scientist: 189 publications — 29th percentile

29% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,295 publications or more.

View publications distribution as a table
Number of Chemistry scientists by publication count, Research.com 2026 ranking edition. Based on 17,934 ranked scientists.
Publications Scientists This scientist
61–80 66
81–100 302
101–120 623
121–140 918
141–160 1,218
161–180 1,350
181–200 1,344 189
201–220 1,281
221–240 1,216
241–260 1,100
261–280 979
281–300 939
301–320 764
321–340 643
341–360 628
361–380 522
381–400 459
401–420 397
421–440 327
441–460 270
461–480 265
481–500 252
501–520 201
521–540 185
541–560 148
561–580 148
581–600 132
601–620 114
621–640 104
641–660 91
661–680 92
681–700 73
701–720 57
721–740 54
741–760 67
761–780 45
781–800 46
801–820 39
821–840 32
841–860 36
861–880 29
881–900 26
901–920 24
921–940 14
941–960 23
961–980 28
981–1,000 15
1,001–1,020 29
1,021–1,040 12
1,041–1,060 19
1,061–1,080 12
1,081–1,100 6
1,101–1,120 8
1,121–1,140 12
1,141–1,160 5
1,161–1,180 6
1,181–1,200 14
1,201–1,220 7
1,221–1,240 2
1,241–1,260 6
1,261–1,280 4
1,281–1,294 6
1,295+ 100
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Jan Almlöf publication distribution in Chemistry in 2026 - data summary

  • The chart plots the publication count of all 17,934 Chemistry scientists ranked by Research.com in 2026, grouped into 63 ranges running from 61–80 to 1,295+ publications.
  • Jan Almlöf, a Chemistry scholar from University of Minnesota, records 189 publications - the 29th percentile of the discipline.
  • 29% of ranked Chemistry scientists score the same or lower than Jan Almlöf, and about 71% score higher.
  • The median of the discipline falls in the 241–260 publications range, and Jan Almlöf ranks below the median.
  • The most crowded range is 161–180 publications, holding 1,350 scientists (8% of the field).
  • 77% of the field sits in the lowest quarter of the value range (up to 361–380 publications), so the distribution is heavily right-skewed and high scores are rare.
  • The final bar has no upper bound: it groups every scientist with 1,295 publications or more, 100 scientists in all (<1% of the field).

Jan Almlöf D-index placement in Chemistry in 2026

The chart shows the D-index (discipline H-index) distribution of Chemistry scientists ranked by Research.com in 2026. The highlighted bar marks where Jan Almlöf sits on this spectrum.

No. of scientists
250 500 750 1,000
Bar chart with 61 bars. Horizontal axis: D-Index, 40–41 to 159+. Vertical axis: number of scientists, 0 to 1,051. Most scientists, 1,051, have 56–57 D-Index. The last bar groups every scientist with 159 D-Index or more. The highlighted bar, 64–65 D-Index, is where this scientist sits. 40–41 D-Index: 289 scientists 42–43 D-Index: 612 scientists 44–45 D-Index: 808 scientists 46–47 D-Index: 776 scientists 48–49 D-Index: 835 scientists 50–51 D-Index: 861 scientists 52–53 D-Index: 872 scientists 54–55 D-Index: 933 scientists 56–57 D-Index: 1,051 scientists 58–59 D-Index: 930 scientists 60–61 D-Index: 882 scientists 62–63 D-Index: 834 scientists 64–65 D-Index: 731 scientists 66–67 D-Index: 775 scientists 68–69 D-Index: 683 scientists 70–71 D-Index: 646 scientists 72–73 D-Index: 561 scientists 74–75 D-Index: 501 scientists 76–77 D-Index: 437 scientists 78–79 D-Index: 388 scientists 80–81 D-Index: 354 scientists 82–83 D-Index: 292 scientists 84–85 D-Index: 275 scientists 86–87 D-Index: 254 scientists 88–89 D-Index: 235 scientists 90–91 D-Index: 185 scientists 92–93 D-Index: 192 scientists 94–95 D-Index: 155 scientists 96–97 D-Index: 163 scientists 98–99 D-Index: 125 scientists 100–101 D-Index: 105 scientists 102–103 D-Index: 105 scientists 104–105 D-Index: 112 scientists 106–107 D-Index: 88 scientists 108–109 D-Index: 68 scientists 110–111 D-Index: 69 scientists 112–113 D-Index: 65 scientists 114–115 D-Index: 79 scientists 116–117 D-Index: 61 scientists 118–119 D-Index: 44 scientists 120–121 D-Index: 37 scientists 122–123 D-Index: 40 scientists 124–125 D-Index: 33 scientists 126–127 D-Index: 26 scientists 128–129 D-Index: 34 scientists 130–131 D-Index: 35 scientists 132–133 D-Index: 25 scientists 134–135 D-Index: 27 scientists 136–137 D-Index: 17 scientists 138–139 D-Index: 16 scientists 140–141 D-Index: 20 scientists 142–143 D-Index: 20 scientists 144–145 D-Index: 15 scientists 146–147 D-Index: 9 scientists 148–149 D-Index: 9 scientists 150–151 D-Index: 16 scientists 152–153 D-Index: 11 scientists 154–155 D-Index: 9 scientists 156–157 D-Index: 3 scientists 158 D-Index: 3 scientists 159+ D-Index: 98 scientists
40–41 D-Index 159+

This scientist: 64 D-Index — 56th percentile

56% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 159 D-Index or more.

View D-Index distribution as a table
Number of Chemistry scientists by D-index, Research.com 2026 ranking edition. Based on 17,934 ranked scientists.
D-Index Scientists This scientist
40–41 289
42–43 612
44–45 808
46–47 776
48–49 835
50–51 861
52–53 872
54–55 933
56–57 1,051
58–59 930
60–61 882
62–63 834
64–65 731 64
66–67 775
68–69 683
70–71 646
72–73 561
74–75 501
76–77 437
78–79 388
80–81 354
82–83 292
84–85 275
86–87 254
88–89 235
90–91 185
92–93 192
94–95 155
96–97 163
98–99 125
100–101 105
102–103 105
104–105 112
106–107 88
108–109 68
110–111 69
112–113 65
114–115 79
116–117 61
118–119 44
120–121 37
122–123 40
124–125 33
126–127 26
128–129 34
130–131 35
132–133 25
134–135 27
136–137 17
138–139 16
140–141 20
142–143 20
144–145 15
146–147 9
148–149 9
150–151 16
152–153 11
154–155 9
156–157 3
158 3
159+ 98
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Jan Almlöf D-index placement in Chemistry in 2026 - data summary

  • The chart plots the discipline H-index (D-index) of all 17,934 Chemistry scientists ranked by Research.com in 2026, grouped into 61 ranges running from 40–41 to 159+ D-Index.
  • Jan Almlöf, a Chemistry scholar from University of Minnesota, records 64 D-Index - the 56th percentile of the discipline.
  • 56% of ranked Chemistry scientists score the same or lower than Jan Almlöf, and about 44% score higher.
  • The median of the discipline falls in the 62–63 D-Index range, and Jan Almlöf ranks above the median.
  • The most crowded range is 56–57 D-Index, holding 1,051 scientists (6% of the field).
  • 70% of the field sits in the lowest quarter of the value range (up to 70–71 D-Index), so the distribution is heavily right-skewed and high scores are rare.
  • The final bar has no upper bound: it groups every scientist with 159 D-Index or more, 98 scientists in all (<1% of the field).

Overview

Jan Almlöf was affiliated with the University of Minnesota in the United States. Their academic career involved research activities connected to this institution.

Throughout their career, Jan Almlöf's work did not record any listed recent papers, co-authors, or frequent publication venues in the provided data. There are no documented publications in books or details about main fields, subfields, or specific topics of study associated with their research.

There is no available information about awards or distinctions received by Jan Almlöf during their professional tenure.

Jan Almlöf is recorded as deceased. The absence of detailed research output and bibliometric data limits the comprehensive overview of their scientific contributions. Nevertheless, their professional association with the University of Minnesota situates them within an academic environment known for diverse scholarly activities.

Best Publications

  • General methods for geometry and wave function optimization

    Thomas H. Fischer;Jan Almlof

  • Integral approximations for LCAO-SCF calculations

    Unknown

  • The complete active space SCF (CASSCF) method in a Newton–Raphson formulation with application to the HNO molecule

    Per E. M. Siegbahn;Jan Almlöf;Anders Heiberg;Björn O. Roos

  • General contraction of Gaussian basis sets. I. Atomic natural orbitals for first- and second-row atoms

    Jan Almlöf;Peter R. Taylor

  • Principles for a direct SCF approach to LICAO–MOab-initio calculations

    J. Almlöf;K. Faegri;K. Korsell

  • Avoiding the integral storage bottleneck in LCAO calculations of electron correlation

    Svein Sæbø;Jan Almlöf

  • Elimination of energy denominators in Møller—Plesset perturbation theory by a Laplace transform approach

    Jan Almlöf

  • Laplace transform techniques in Mo/ller–Plesset perturbation theory

    Marco Häser;Jan Almlöf

  • A theoretical study of multidimensional nuclear tunneling in malonaldehyde

    Norihiro Shida;Paul F. Barbara;Jan E. Almlöf

  • THE EQUILIBRIUM GEOMETRY OF C60 AS PREDICTED BY SECOND-ORDER (MP2) PERTURBATION THEORY

    Macro Häser;Jan Almlöf;Gustavo E. Scuseria

  • AB initio studies on the thermodynamic stability of the icosahedral C60 molecule “buckminsterfullerene”

    Hans Peter Lüthi;Jan Almlöf

  • Relative stabilities of fullerene, cumulene, and polyacetylene structures for Cn : n=18–60

    Martin Feyereisen;Maciej Gutowski;Jack Simons;Jan Almlöf

  • A reaction surface Hamiltonian treatment of the double proton transfer of formic acid dimer

    Norihiro Shida;Paul F. Barbara;Jan Almlöf

  • Electron correlation in tetrapyrroles: ab initio calculations on porphyrin and the tautomers of chlorin

    Jan Almlof;Thomas H. Fischer;Paul G. Gassman;Abhik Ghosh

  • C20: the smallest fullerene?

    V. Parasuk;J. Almlöf

  • Fast assembly of the Coulomb matrix: A quantum chemical tree code

    Matt Challacombe;Eric Schwegler;Jan Almlöf

  • Molecular Hessians for large-scale MCSCF wave functions

    Trygve U. Helgaker;Jan Almlöf;Hans Jo;rgen Aa. Jensen

  • Atomic Natural Orbital (ANO) Basis Sets for Quantum Chemical Calculations

    Jan Almlöf;Peter R. Taylor

  • How well does the Hartree–Fock model predict equilibrium geometries of transition metal complexes? Large‐scale LCAO–SCF studies on ferrocene and decamethylferrocene

    H. P. Lüthi;J. H. Ammeter;J. Almlöf;K. Faegri

  • General contraction of Gaussian basis sets. II - Atomic natural orbitals and the calculation of atomic and molecular properties

    Jan Almlof;Peter R. Taylor

  • Electronic effects of peripheral substituents in porphyrins: x-ray photoelectron spectroscopy and ab initio self-consistent field calculations

    Paul G. Gassman;Abhik Ghosh;Jan Almlof

Frequent Co-Authors

Peter R. Taylor
Peter R. Taylor Tianjin University
Abhik Ghosh
Abhik Ghosh University of Tromsø - The Arctic University of Norway
Trygve Helgaker
Trygve Helgaker University of Oslo
Per E. M. Siegbahn
Per E. M. Siegbahn Stockholm University
Paul G. Gassman
Paul G. Gassman University of Minnesota
Per Halfdan Nielsen
Per Halfdan Nielsen University of Copenhagen
Ulf Wahlgren
Ulf Wahlgren Stockholm University
Paul F. Barbara
Paul F. Barbara The University of Texas at Austin
Lawrence Que
Lawrence Que University of Minnesota
Hilde Fagerli
Hilde Fagerli Norwegian Meteorological Institute

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