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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Chemistry 55 12157 10943 76 71 244 10584

Paul Wan Sia Heng publications per year

The chart shows the history of publications by Paul Wan Sia Heng between 1985 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Paul Wan Sia Heng published across 41 years, from 1985 to 2025, averaging 8.4 papers a year. Output peaked at 21 publications in 2008. 13 of the 346 publications appeared in the last two years.

No. of publications
5 10 15 20
Bar chart. Horizontal axis: year, 1985 to 2025. Vertical axis: number of publications, 0 to 21. Peak 21 publications in 2008. 1985: 2 publications 1986: 1 publication 1987: 2 publications 1988: 1 publication 1989: 0 publications 1990: 1 publication 1991: 2 publications 1992: 6 publications 1993: 6 publications 1994: 4 publications 1995: 5 publications 1996: 4 publications 1997: 1 publication 1998: 4 publications 1999: 8 publications 2000: 8 publications 2001: 4 publications 2002: 11 publications 2003: 10 publications 2004: 10 publications 2005: 18 publications 2006: 15 publications 2007: 12 publications 2008: 21 publications 2009: 6 publications 2010: 10 publications 2011: 12 publications 2012: 11 publications 2013: 11 publications 2014: 13 publications 2015: 17 publications 2016: 15 publications 2017: 13 publications 2018: 15 publications 2019: 12 publications 2020: 15 publications 2021: 4 publications 2022: 10 publications 2023: 13 publications 2024: 11 publications 2025: 2 publications
1985 2025

346 publications in total across all disciplines

View publications per year as a table
Paul Wan Sia Heng: publications per year, 1985 to 2025
Year Publications
1985 2
1986 1
1987 2
1988 1
1989 0
1990 1
1991 2
1992 6
1993 6
1994 4
1995 5
1996 4
1997 1
1998 4
1999 8
2000 8
2001 4
2002 11
2003 10
2004 10
2005 18
2006 15
2007 12
2008 21
2009 6
2010 10
2011 12
2012 11
2013 11
2014 13
2015 17
2016 15
2017 13
2018 15
2019 12
2020 15
2021 4
2022 10
2023 13
2024 11
2025 2
Total 346
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Paul Wan Sia Heng 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 Paul Wan Sia Heng 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, 241–260 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: 244 publications — 48th percentile

48% 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
201–220 1,281
221–240 1,216
241–260 1,100 244
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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Paul Wan Sia Heng 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 Paul Wan Sia Heng 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, 54–55 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: 55 D-Index — 33rd percentile

33% 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 55
56–57 1,051
58–59 930
60–61 882
62–63 834
64–65 731
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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Overview

Paul Wan Sia Heng is affiliated with the National University of Singapore in Singapore. Their research spans multiple fields with a primary focus on Pharmacology, Toxicology and Pharmaceutics as well as Engineering.

Their scholarly output includes significant contributions to Pharmaceutical Science and Food Science, alongside work in Mechanical Engineering, Analytical Chemistry, and Pediatrics, Perinatology and Child Health. Their main topics of study encompass Drug Solubility and Delivery Systems, Microencapsulation and Drying Processes, Powder Metallurgy Techniques and Materials, Analytical Methods in Pharmaceuticals, Pharmaceutical Studies and Practices, Injection Molding Process and Properties, and Advanced Drug Delivery Systems.

Among the recent papers associated with Paul Wan Sia Heng are:

  • High pressure homogenization - An update on its usage and understanding (2023), published in Process Safety and Environmental Protection
  • Insights on the role of excipients and tablet matrix porosity on aspirin stability (2020), published in International Journal of Pharmaceutics
  • Ensuring Product Stability - Choosing the Right Excipients (2022), published in Journal of Pharmaceutical Sciences
  • Relative Humidity Cycling: Implications on the Stability of Moisture-Sensitive Drugs in Solid Pharmaceutical Products (2022), published in Molecular Pharmaceutics
  • Influence of the porosity of cushioning excipients on the compaction of coated multi-particulates (2020), published in European Journal of Pharmaceutics and Biopharmaceutics

Frequent coauthors of Paul Wan Sia Heng include Lai Wah Chan, Natalia Veronica, Celine Valeria Liew, Daniel Robin Thio, and Tze Ning Hiew.

Their work is regularly published in venues such as:

  • International Journal of Pharmaceutics (16 publications)
  • Molecular Pharmaceutics (4 publications)
  • European Journal of Pharmaceutics and Biopharmaceutics (4 publications)
  • Pharmaceutics (3 publications)
  • AAPS PharmSciTech (2 publications)

Best Publications

  • Alginates as a useful natural polymer for microencapsulation and therapeutic applications

    Cheong Hian Goh;Paul Wan Sia Heng;Lai Wah Chan

  • Overview of milling techniques for improving the solubility of poorly water-soluble drugs

    Zhi Hui Loh;Asim Kumar Samanta;Paul Wan Sia Heng

  • Microencapsulation of microbial cells

    Sweta Rathore;Parind Mahendrakumar Desai;Celine Valeria Liew;Lai Wah Chan

  • Evaluation of sodium alginate as drug release modifier in matrix tablets.

    Celine Valeria Liew;Lai Wah Chan;Ai Ling Ching;Paul Wan Sia Heng

  • Mechanisms of external and internal gelation and their impact on the functions of alginate as a coat and delivery system

    Lai Wah Chan;Huey Ying Lee;Paul W.S. Heng

  • Cross-linking mechanisms of calcium and zinc in production of alginate microspheres.

    L.W Chan;Y Jin;P.W.S Heng

  • Evaluating proteins release from, and their interactions with, thermosensitive poly (N-isopropylacrylamide) hydrogels.

    Jing-Yi Wu;Shao-Qiong Liu;Paul Wan-Sia Heng;Yi-Yan Yang

  • Production of alginate microspheres by internal gelation using an emulsification method.

    L.W Chan;H.Y Lee;P.W.S Heng

  • Effect of oil loading on microspheres produced by spray drying.

    L. H. Tan;L. W. Chan;P. W. S. Heng

  • Design of controlled-release solid dosage forms of alginate and chitosan using microwave.

    Tin Wui Wong;Lai Wah Chan;Shyan Bin Kho;Paul Wan Sia Heng

  • Investigation of the influence of mean HPMC particle size and number of polymer particles on the release of aspirin from swellable hydrophilic matrix tablets.

    Paul Wan Sia Heng;Lai Wah Chan;Michael G Easterbrook;Xiaoman Li

  • Drug encapsulation in alginate microspheres by emulsification

    L. S. C. Wan;P. W. S. Heng;L. W. Chan

  • Relationship Between Swelling and Drug Release in a Hydrophilic Matrix

    Lucy S. C. Wan;Paul W. S. Heng;L. F. Wong

  • Relationship between polymer viscosity and drug release from a matrix system.

    Lucy Wan Sai Cheong;Paul Wan Sia Heng;Lee Fun Wong

  • Improved formulation of photosensitizer chlorin e6 polyvinylpyrrolidone for fluorescence diagnostic imaging and photodynamic therapy of human cancer

    William Wei Lim Chin;Paul Wan Sia Heng;Patricia Soo Ping Thong;Ramaswamy Bhuvaneswari

  • Coating of multiparticulates for sustained release

    Elaine S. K. Tang;L. W. Chan;Paul W. S. Heng

  • In-line quantification of micronized drug and excipients in tablets by near infrared (NIR) spectroscopy: Real time monitoring of tabletting process.

    Atul D. Karande;Paul Wan Sia Heng;Celine Valeria Liew

  • Effects of aldehydes and methods of cross-linking on properties of calcium alginate microspheres prepared by emulsification.

    Lai Wah Chan;Paul W.S. Heng

  • The effect of hydroxypropylmethylcellulose on water penetration into a matrix system

    L.S.C. Wan;P.W.S. Heng;L.F. Wong

  • Matrix swelling: A simple model describing extent of swelling of HPMC matrices

    Lucy Sai Cheong Wan;Paul Wan Sia Heng;Lee Fun Wong

  • Controlled release drug delivery systems.

    Paul W. S. Heng

Frequent Co-Authors

William W. Chin
William W. Chin Harvard Medical School
Reginald B. H. Tan
Reginald B. H. Tan National University of Singapore
Yi Yan Yang
Yi Yan Yang Agency for Science, Technology and Research
Changquan Calvin Sun
Changquan Calvin Sun University of Minnesota
Steven T. Wereley
Steven T. Wereley Purdue University West Lafayette
Siling Wang
Siling Wang Shenyang Pharmaceutical University
Zexiang Shen
Zexiang Shen Nanyang Technological University
Eng Seng Chan
Eng Seng Chan Monash University Malaysia
Paul C. Ho
Paul C. Ho National University of Singapore
Peter York
Peter York University of Bradford

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