H H Ang

Summary

Affiliation: Universiti Sains Malaysia
Country: Malaysia

Publications

  1. ncbi request reprint Quassinoids from Eurycoma longifolia
    Hooi Hoon Ang
    School of Pharmacy, Tokyo University of Pharmacy and Life Science, 1432 1 Horinouchi, Hachioji, 192 0392, Tokyo, Japan
    Phytochemistry 59:833-7. 2002
  2. ncbi request reprint Determination of mercury by cold vapor atomic absorption spectrophotometer in Tongkat Ali preparations obtained in Malaysia
    Hooi Hoon Ang
    School of Pharmaceutical Sciences, University Science Malaysia, Minden, Penang, Malaysia
    Int J Toxicol 23:65-71. 2004
  3. doi request reprint Lead contamination in Eugenia dyeriana herbal preparations from different commercial sources in Malaysia
    H H Ang
    School of Pharmaceutical Sciences, University Science Malaysia, Minden, 11800 Penang, Malaysia
    Food Chem Toxicol 46:1969-75. 2008
  4. ncbi request reprint Effects of Eurycoma longifolia Jack on sexual qualities in middle aged male rats
    H H Ang
    School of Pharmaceutical Sciences, University Science Malaysia, Minden, Penang, Malaysia
    Phytomedicine 10:590-3. 2003
  5. ncbi request reprint Eurycoma longifolia Jack enhances sexual motivation in middle-aged male mice
    Hooi Hoon Ang
    School of Pharmaceutical Sciences, University Science Malaysia, Minden, Penang, Malaysia
    J Basic Clin Physiol Pharmacol 14:301-8. 2003
  6. ncbi request reprint Determination of lead in Smilax myosotiflora herbal preparations obtained in Malaysia
    H H Ang
    School of Pharmaceutical Sciences, Universiti Sains Malaysia, Minden, Penang
    Int J Environ Health Res 14:261-72. 2004
  7. ncbi request reprint Sexual arousal in sexually sluggish old male rats after oral administration of Eurycoma longifolia Jack
    Hooi Hoon Ang
    School of Pharmaceutical Sciences, University Science Malaysia, Minden, Penang, Malaysia
    J Basic Clin Physiol Pharmacol 15:303-9. 2004
  8. ncbi request reprint Determination of lead in Smilax luzonensis herbal preparations in Malaysia
    Hooi Hoon Ang
    School of Pharmaceutical Sciences, University Science Malaysia, Minden, Penang, Malaysia
    Int J Toxicol 24:165-71. 2005
  9. ncbi request reprint Susceptibility studies of Malaysian Plasmodium falciparum clones to type II antifolate drugs after 3 years of continuous in vitro culture
    Hooi Hoon Ang
    School of Pharmaceutical Sciences, University Science Malaysia, Minden, Penang
    Chemotherapy 51:377-80. 2005
  10. ncbi request reprint Contamination of mercury in tongkat Ali hitam herbal preparations
    H H Ang
    School of Pharmaceutical Sciences, University Science Malaysia, Minden, Penang 11800, Malaysia
    Food Chem Toxicol 44:1245-50. 2006

Collaborators

Detail Information

Publications25

  1. ncbi request reprint Quassinoids from Eurycoma longifolia
    Hooi Hoon Ang
    School of Pharmacy, Tokyo University of Pharmacy and Life Science, 1432 1 Horinouchi, Hachioji, 192 0392, Tokyo, Japan
    Phytochemistry 59:833-7. 2002
    ..The structures of 1-3 were elucidated by spectroscopic methods, and that of 3 was further confirmed by X-ray crystallography. The known quassinoids, laurycolactone B (4) and eurycomalactone (5) were also identified...
  2. ncbi request reprint Determination of mercury by cold vapor atomic absorption spectrophotometer in Tongkat Ali preparations obtained in Malaysia
    Hooi Hoon Ang
    School of Pharmaceutical Sciences, University Science Malaysia, Minden, Penang, Malaysia
    Int J Toxicol 23:65-71. 2004
    ....
  3. doi request reprint Lead contamination in Eugenia dyeriana herbal preparations from different commercial sources in Malaysia
    H H Ang
    School of Pharmaceutical Sciences, University Science Malaysia, Minden, 11800 Penang, Malaysia
    Food Chem Toxicol 46:1969-75. 2008
    ....
  4. ncbi request reprint Effects of Eurycoma longifolia Jack on sexual qualities in middle aged male rats
    H H Ang
    School of Pharmaceutical Sciences, University Science Malaysia, Minden, Penang, Malaysia
    Phytomedicine 10:590-3. 2003
    ..Hence, this study shows that E. longifolia Jack enhanced the sexual qualities of the middle aged male rats, further supports the folkuse of E. longifolia Jack as an aphrodisiac...
  5. ncbi request reprint Eurycoma longifolia Jack enhances sexual motivation in middle-aged male mice
    Hooi Hoon Ang
    School of Pharmaceutical Sciences, University Science Malaysia, Minden, Penang, Malaysia
    J Basic Clin Physiol Pharmacol 14:301-8. 2003
    ..In conclusion, this study has shown that E. longifolia Jack continues to enhance sexual motivation in adult, middle-aged male mice and in retired breeders...
  6. ncbi request reprint Determination of lead in Smilax myosotiflora herbal preparations obtained in Malaysia
    H H Ang
    School of Pharmaceutical Sciences, Universiti Sains Malaysia, Minden, Penang
    Int J Environ Health Res 14:261-72. 2004
    ....
  7. ncbi request reprint Sexual arousal in sexually sluggish old male rats after oral administration of Eurycoma longifolia Jack
    Hooi Hoon Ang
    School of Pharmaceutical Sciences, University Science Malaysia, Minden, Penang, Malaysia
    J Basic Clin Physiol Pharmacol 15:303-9. 2004
    ..We conclude that the results of this study support the folk use of this plant as an aphrodisiac...
  8. ncbi request reprint Determination of lead in Smilax luzonensis herbal preparations in Malaysia
    Hooi Hoon Ang
    School of Pharmaceutical Sciences, University Science Malaysia, Minden, Penang, Malaysia
    Int J Toxicol 24:165-71. 2005
    ....
  9. ncbi request reprint Susceptibility studies of Malaysian Plasmodium falciparum clones to type II antifolate drugs after 3 years of continuous in vitro culture
    Hooi Hoon Ang
    School of Pharmaceutical Sciences, University Science Malaysia, Minden, Penang
    Chemotherapy 51:377-80. 2005
    ..Therefore, the susceptibility of these clones to the type II antifolate drugs, cycloguanil and pyrimethamine, before and after subculturing them in vitro for a period of 3 years, was studied...
  10. ncbi request reprint Contamination of mercury in tongkat Ali hitam herbal preparations
    H H Ang
    School of Pharmaceutical Sciences, University Science Malaysia, Minden, Penang 11800, Malaysia
    Food Chem Toxicol 44:1245-50. 2006
    ..5 ppm for mercury. Out of these 26 products, four products have already registered with the DCA, Malaysia whilst the rest, however, have not registered with the DCA, Malaysia...
  11. ncbi request reprint Evaluation of mercury contamination in Smilax myosotiflora herbal preparations
    Hooi Hoon Ang
    School of Pharmaceutical Sciences, Universiti Sains Malaysia, Minden, Penang, Malaysia
    Int J Toxicol 26:433-9. 2007
    ....
  12. ncbi request reprint Analysis of lead content in herbal preparations in Malaysia
    H H Ang
    School of Pharmaceutical Sciences, Universiti Sains Malaysia, Minden, 11800, Penang, Malaysia
    Hum Exp Toxicol 22:445-51. 2003
    ..Although this study showed that only 92% of the products complied with the quality requirement for traditional medicines in Malaysia, however, they cannot be assumed safe from lead contamination because of batch-to-batch inconsistency...
  13. ncbi request reprint Effect of Eurycoma longifolia Jack on orientation activities in middle-aged male rats
    H H Ang
    School of Pharmaceutical Sciences, University Science Malaysia, Minden, 11800, Penang, Malaysia
    Fundam Clin Pharmacol 16:479-83. 2002
    ..In conclusion, this study gives further evidences that different fractions of E. longifolia Jack modified the orientation activities of the middle-aged male rats...
  14. ncbi request reprint Effect of Eurycoma longifolia Jack on libido in middle-aged male rats
    Hooi Hoon Ang
    School of Pharmaceutical Sciences, University Science Malaysia, Minden, Penang, Malaysia
    J Basic Clin Physiol Pharmacol 13:249-54. 2002
    ..7%, 13.0%, 8.7%, and 13.0% for these fractions, respectively, during the 20-minute observation period. The results of this study show that E. longifolia Jack extracts can increase libido in middle-aged male rats...
  15. ncbi request reprint Electrophoretic variations of peptidase E (PEPE) in characterizing clones and isolates of Plasmodium falciparum from different geographical areas
    H H Ang
    School of Pharmaceutical Sciences, University of Science Malaysia, Penang, Malaysia
    Folia Parasitol (Praha) 44:128-30. 1997
    ..3.4.11 or 13). Results showed that they were pure clones as they were monovariant with regards to this enzyme unlike their parent isolates which were divariant...
  16. ncbi request reprint Effects of Eurycoma longifolia jack on laevator ani muscle in both uncastrated and testosterone-stimulated castrated intact male rats
    H H Ang
    School of Pharmaceutical Sciences, University Science Malaysia, Minden, 11800, Penang, Malaysia
    Arch Pharm Res 24:437-40. 2001
    ..Hence, the pro-androgenic effect as shown by this study further supported the traditional use of this plant as an aphrodisiac...
  17. ncbi request reprint Susceptibility of Malaysian Plasmodium falciparum isolates to antimalarial drugs after cryopreservation and 12 months of continuous in vitro culture
    H H Ang
    School of Pharmaceutical Sciences, University of Science Malaysia, Penang
    Chemotherapy 43:311-5. 1997
    ..8, 74.3, 112.4, 89.8, 91.8 and 103.3 nM for cycloguanil, and 26.9, 31.4, 47.0, 28.1, 14.9 and 56.7 nM for pyrimethamine. Thus none of these isolates differed in their original susceptibilities after either of these procedures...
  18. ncbi request reprint Quantitative assessment of Malaysian plasmodium falciparum clones to schizontocidal drugs before and after cryopreservation
    H H Ang
    School of Pharmaceutical Sciences, University of Science Malaysia, Minden Penang, Malaysia
    Chemotherapy 45:446-51. 1999
    ..They, however, maintained their original susceptibilities after cryopreservation...
  19. ncbi request reprint Evaluation of the potency activity of aphrodisiac in Eurycoma longifolia Jack
    H H Ang
    School of Pharmaceutical Sciences, University Science Malaysia, Minden, 11800, Penang, Malaysia
    Phytother Res 15:435-6. 2001
    ..These results provide further evidence that E. longifolia increases the aphrodisiac potency activity in treated animals...
  20. ncbi request reprint Effect of 7-day daily replacement of culture medium containing Eurycoma longifolia Jack constituents on the Malaysian Plasmodium falciparum isolates
    H H Ang
    School of Pharmaceutical Sciences, University Science Malaysia, Penang
    J Ethnopharmacol 49:171-5. 1995
    ..Further results indicated that chloroquine exhibited total inhibition at concentrations > 2.50 and 0.62 micrograms ml-1 after 1 and 2 days post-treatment, respectively and at all concentrations after 3 days post-treatment...
  21. ncbi request reprint Studies on the anxiolytic activity of Eurycoma longifolia Jack roots in mice
    H H Ang
    School of Pharmaceutical Sciences, University Science Malaysia, Minden, Penang
    Jpn J Pharmacol 79:497-500. 1999
    ..4 fighting episodes) when compared with control mice. In addition, these results were found to be consistent with anxiolytic effect produced by diazepam. Hence, this study supports the medicinal use of this plant for anxiety therapy...
  22. ncbi request reprint Herbal medicines in Malaysia
    Hooi Hoon Ang
    Clin Pharmacol Ther 77:451. 2005
  23. ncbi request reprint Aphrodisiac evaluation in non-copulator male rats after chronic administration of Eurycoma longifolia Jack
    H H Ang
    School of Pharmaceutical Sciences, University of Science Malaysia, Minden, 11800, Penang, Malaysia
    Fundam Clin Pharmacol 15:265-8. 2001
    ..Hence, this study lends further support to the use of the plant by indigenous populations as a traditional medicine for its aphrodisiac property...
  24. ncbi request reprint Potential drug-herb interaction with antiplatelet/anticoagulant drugs
    Jun Tze Saw
    School of Pharmaceutical Sciences, University Science Malaysia, Minden, 11800 Penang, Malaysia
    Complement Ther Clin Pract 12:236-41. 2006
    ..It is thus prudent for all care givers to be aware of the possibility of drug-herb interaction and inquire about herbal use from patients...
  25. ncbi request reprint An insight into Malaysian herbal medicines
    Hooi Hoon Ang
    Trends Pharmacol Sci 25:297-8. 2004