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D-Index & Metrics

Discipline name D-Index World Ranking National Ranking Publications Citations
Chemistry 68 6731 45 158 12314

Ephraim Katchalski publications per year

The chart shows the history of publications by Ephraim Katchalski between 1950 and 2023, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Ephraim Katchalski published across 74 years, from 1950 to 2023, averaging 2.1 papers a year. Output peaked at 14 publications in 1968. 1 of the 159 publications appeared in the last two years.

No. of publications
5 10
Bar chart. Horizontal axis: year, 1950 to 2023. Vertical axis: number of publications, 0 to 14. Peak 14 publications in 1968. 1950: 1 publication 1951: 6 publications 1952: 3 publications 1953: 4 publications 1954: 4 publications 1955: 7 publications 1956: 9 publications 1957: 4 publications 1958: 3 publications 1959: 3 publications 1960: 6 publications 1961: 2 publications 1962: 8 publications 1963: 4 publications 1964: 6 publications 1965: 6 publications 1966: 12 publications 1967: 4 publications 1968: 14 publications 1969: 8 publications 1970: 6 publications 1971: 11 publications 1972: 10 publications 1973: 11 publications 1974: 4 publications 1975: 0 publications 1976: 0 publications 1977: 0 publications 1978: 0 publications 1979: 0 publications 1980: 0 publications 1981: 0 publications 1982: 0 publications 1983: 0 publications 1984: 0 publications 1985: 0 publications 1986: 0 publications 1987: 0 publications 1988: 0 publications 1989: 0 publications 1990: 0 publications 1991: 0 publications 1992: 0 publications 1993: 0 publications 1994: 0 publications 1995: 0 publications 1996: 0 publications 1997: 0 publications 1998: 0 publications 1999: 0 publications 2000: 0 publications 2001: 0 publications 2002: 0 publications 2003: 0 publications 2004: 0 publications 2005: 0 publications 2006: 1 publication 2007: 0 publications 2008: 1 publication 2009: 0 publications 2010: 0 publications 2011: 0 publications 2012: 0 publications 2013: 0 publications 2014: 0 publications 2015: 0 publications 2016: 0 publications 2017: 0 publications 2018: 0 publications 2019: 0 publications 2020: 0 publications 2021: 0 publications 2022: 0 publications 2023: 1 publication
1950 2023

159 publications in total across all disciplines

View publications per year as a table
Ephraim Katchalski: publications per year, 1950 to 2023
Year Publications
1950 1
1951 6
1952 3
1953 4
1954 4
1955 7
1956 9
1957 4
1958 3
1959 3
1960 6
1961 2
1962 8
1963 4
1964 6
1965 6
1966 12
1967 4
1968 14
1969 8
1970 6
1971 11
1972 10
1973 11
1974 4
1975 0
1976 0
1977 0
1978 0
1979 0
1980 0
1981 0
1982 0
1983 0
1984 0
1985 0
1986 0
1987 0
1988 0
1989 0
1990 0
1991 0
1992 0
1993 0
1994 0
1995 0
1996 0
1997 0
1998 0
1999 0
2000 0
2001 0
2002 0
2003 0
2004 0
2005 0
2006 1
2007 0
2008 1
2009 0
2010 0
2011 0
2012 0
2013 0
2014 0
2015 0
2016 0
2017 0
2018 0
2019 0
2020 0
2021 0
2022 0
2023 1
Total 159
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Ephraim Katchalski 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 Ephraim Katchalski 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, 141–160 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: 158 publications — 17th percentile

17% 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 1,218 158
161–180 1,350
181–200 1,344
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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Ephraim Katchalski 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 Ephraim Katchalski 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, 68–69 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: 68 D-Index — 64th percentile

64% 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
66–67 775
68–69 683 68
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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Overview

Ephraim Katchalski was a researcher affiliated with the Weizmann Institute of Science in Israel. Their work was documented mainly through publications in the journal Biopolymers, where all of their recent recorded papers appeared.

The recent papers attributed to them, showing continuity in publication from 2021 to 2023, include:

  • Issue Information, 2021, Biopolymers
  • Issue Information, 2022, Biopolymers
  • Issue Information, 2023, Biopolymers
  • Issue Information, 2023, Biopolymers
  • Issue Information, 2023, Biopolymers

These papers, while all sharing the same title "Issue Information," reflect a series of contributions over multiple years with different primary authors associated, indicating a collaborative editorial or contributing role in these volumes.

Katchalski worked with several frequent co-authors, each appearing in five co-authored works. These included:

  • Elkan Blout
  • Murray Goodman
  • David N. Beratan
  • Stephen C. Blacklow
  • Axel T. Brünger

Their publication activity was strongly tied to the journal Biopolymers, which served as their main venue of scholarly output.

Although specific research fields or topics were not enumerated, the association with Biopolymers suggests involvement in areas related to biochemical polymers and molecular biology, consistent with the focus of that journal.

The absence of recorded awards or book publications suggests their academic contributions were primarily journal-based. Their continuing collaborations with established scientists indicate engagement in ongoing research networks within their domain.

Best Publications

  • Poly-α-Amino Acids

    Ephraim Katchalski

  • The Configurational Changes of Poly-L-proline in Solution

    Izchak Z. Steinberg;William F. Harrington;Arieh Berger;Michael Sela

  • Synthesis and chemical properties of poly-alpha-amino acids.

    Ephraim Katchalski;Michael Sela

  • A WATER-INSOLUBLE POLYANIONIC DERIVATIVE OF TRYPSIN. I. PREPARATION AND PROPERTIES.

    Yehuda Levin;Marit Pecht;Leon Goldstein;Ephraim Katchalski

  • Lymphocyte transformation induced by concanavalin A and its reversion by methyl-α-d-mannopyranoside

    Abraham Novogrodsky;Ephraim Katchalski

  • Theoretical Analysis of the Role of Diffusion in Chemical Reactions, Fluorescence Quenching, and Nonradiative Energy Transfer

    Izchak Z. Steinberg;Ephraim Katchalski

  • Precipitation of arabic acid and some seed polysaccharides by glycosylphenylazo dyes

    J Yariv;H Lis;E Katchalski

  • Polymers tripeptides as collagen models. II. Conformational changes of poly(L-prolyl-glycyl-L-prolyl) in solution.

    J. Engel;J. Kurtz;E. Katchalski;A. Berger

  • Conformational studies of poly‐L‐alanine in water

    R. T. Ingwall;H. A. Scheraga;N. Lotan;A. Berger

  • Papain-collodion membranes. I. Preparation and properties.

    Goldman R;Kedem O;Silman Ih;Caplan

  • Biological properties of poly-alpha-amino acids.

    Michael Sela;Ephraim Katchalski

  • Soybean hemagglutinin, a plant glycoprotein. I. Isolation of a glycopeptide.

    Halina Lis;Nathan Sharon;Ephraim Katchalski

  • Papain--collodion membranes. II. Analysis of the kinetic behavior of enzymes immobilized in artificial membranes.

    Rachel. Goldman;Ora. Kedem;Ephraim. Katchalski

  • Kinetic behavior of a two-enzyme membrane carrying out a consecutive set of reactions

    Rachel Goldman;Ephraim Katchalski

  • Poly-L-proline

    Arieh Berger;Joseph Kurtz;Ephraim Katchalski

  • The Availability of the Disulfide Bonds of Human and Bovine Serum Albumin and of Bovine γ-Globulin to Reduction by Thioglycolic Acid

    Ephraim Katchalski;George S. Benjamin;Violet Gross

  • PREPARATION AND PROPERTIES OF WATER-INSOLUBLE DERIVATIVES OF UREASE.

    Erella Riesel;Ephraim Katchalski

  • A Synthesis of Cyclic Peptides Utilizing High Molecular Weight Carriers

    Mati Fridkin;Abraham Patchornik;Ephraim Katchalski

  • A Two-stage Cleavage of Rabbit γ-Globulin by a Water-insoluble Papain Preparation Followed by Cysteine

    John J. Cebra;David Givol;H.I. Silman;Ephraim Katchalski

  • Papain Membrane on a Collodion Matrix: Preparation and Enzymic Behavior

    R. Goldman;H. I. Silman;S. R. Caplan;O. Kedem

  • Effect of the microenvironment on the mode of action of immobilized enzymes.

    Ephraim Katchalski;Israel Silman;Rachel Goldman

Frequent Co-Authors

Michael Sela
Michael Sela Weizmann Institute of Science
Nathan Sharon
Nathan Sharon Weizmann Institute of Science
Mati Fridkin
Mati Fridkin Weizmann Institute of Science
Halina Lis
Halina Lis Weizmann Institute of Science
Uriel Z. Littauer
Uriel Z. Littauer Weizmann Institute of Science
Israel Silman
Israel Silman Weizmann Institute of Science
Jeffrey M. Becker
Jeffrey M. Becker University of Tennessee at Knoxville
David Givol
David Givol Weizmann Institute of Science
Harold A. Scheraga
Harold A. Scheraga Cornell University
Leo Sachs
Leo Sachs Weizmann Institute of Science

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