H. Koh

发表

Herbal bioactivation: The good, the bad and the ugly

Edmund Jon Deoon Lee, Hwee-Ling Koh, Shufeng Zhou, 2003, Life Sciences.

Chemical and morphological variations of Panax notoginseng and their relationship.

Dong Wang, Yan Hong, Min Xu, 2013, Phytochemistry.

Genetic diversity and variation of saponin contents in Panax notoginseng roots from a single farm.

H. Koh, Deborah Y Q Hong, A. Lau, 2005, Journal of agricultural and food chemistry.

Biodiversity in cultivated Panax notoginseng populations

H. Koh, Ying-Jun Zhang, Chong-ren Yang, 2008, Acta Pharmacologica Sinica.

Anti-proliferative effects of raw and steamed extracts of Panax notoginseng and its ginsenoside constituents on human liver cancer cells

S. Neo, E. Chan, H. Koh, 2011, Chinese medicine.

High-performance liquid chromatographic method with quantitative comparisons of whole chromatograms of raw and steamed Panax notoginseng.

A. Lau, H. Koh, Bee-Hong Seo, 2004, Journal of chromatography. A.

Antiplatelet and anticoagulant effects of Panax notoginseng: comparison of raw and steamed Panax notoginseng with Panax ginseng and Panax quinquefolium.

A. Lau, H. Koh, Ding-Fung Toh, 2009, Journal of ethnopharmacology.

Guide To Medicinal Plants, A: An Illustrated Scientific And Medicinal Approach

Chay-Hoon Tan, H. Koh, T. Chua, 2009 .

Determination of indican, isatin, indirubin and indigotin in Isatis indigotica by liquid chromatography/electrospray ionization tandem mass spectrometry.

H. Koh, P. Zou, 2007, Rapid communications in mass spectrometry : RCM.

Detection of aristolochic acid I, tetrandrine and fangchinoline in medicinal plants by high performance liquid chromatography and liquid chromatography/mass spectrometry.

E. Chan, H. Koh, S. Woo, 2006, Journal of pharmaceutical and biomedical analysis.

Hepatotoxic potential of asarones: in vitro evaluation of hepatotoxicity and quantitative determination in herbal products

H. Ho, H. Koh, D. Patel, 2015, Front. Pharmacol..

Simultaneous determination of synthetic phosphodiesterase-5 inhibitors found in a dietary supplement and pre-mixed bulk powders for dietary supplements using high-performance liquid chromatography with diode array detection and liquid chromatography-electrospray ionization tandem mass spectrometry.

H. Koh, P. Zou, M. Low, 2006, Journal of chromatography. A.

Structural elucidation of a tadalafil analogue found as an adulterant of a herbal product

H. Koh, P. Zou, M. Low, 2006, Food additives and contaminants.

Determination of ginsenosides in medicinal plants and health supplements by pressurized liquid extraction (PLE) with reversed phase high performance liquid chromatography

E. Ong, H. Koh, S. Woo, 2002 .

A preliminary ecotoxicity study of pharmaceuticals in the marine environment.

Amy M F Choong, H. Koh, S. Teo, 2006, Journal of toxicology and environmental health. Part A.

Ultra-high performance liquid chromatography/time-of-flight mass spectrometry (UHPLC/TOFMS) for time-dependent profiling of raw and steamed Panax notoginseng.

E. Chan, L. New, H. Koh, 2010, Journal of pharmaceutical and biomedical analysis.

Analysis of saponins in raw and steamed Panax notoginseng using high-performance liquid chromatography with diode array detection.

A. Lau, H. Koh, S. Woo, 2003, Journal of chromatography. A.

Current trends in modern pharmaceutical analysis for drug discovery.

H. Koh, P. Ong, Wai-Ping Yau, 2003, Drug discovery today.

Development of Phosphodiesterase–Protein-Kinase Complexes as Novel Targets for Discovery of Inhibitors with Enhanced Specificity

G. Anand, H. Koh, N. Tulsian, 2021, International journal of molecular sciences.

Hydrophilic interaction liquid chromatography with tandem mass spectrometry for the determination of underivatized dencichine (beta-N-oxalyl-L-alpha,beta-diaminopropionic acid) in Panax medicinal plant species.

E. Chan, A. Lau, H. Koh, 2005, Rapid communications in mass spectrometry : RCM.

Hypoglycemic Properties of Polysaccharides Extracted From Ganoderma lucidum in Alloxan-Induced Diabetic Rats

Shufeng Zhou, E. Chan, H. Koh, 2004 .

Quantification of α- and β-amyrin in rat plasma by gas chromatography-mass spectrometry: application to preclinical pharmacokinetic study.

J. Ching, Chay-Hoon Tan, H. Koh, 2011, Journal of mass spectrometry : JMS.

Structural elucidation of a new sildenafil analogue using high-resolution Orbitrap mass spectrometry.

H. Koh, M. Low, C. Kee, 2013, Rapid communications in mass spectrometry : RCM.

St. John's wort attenuates irinotecan-induced diarrhea via down-regulation of intestinal pro-inflammatory cytokines and inhibition of intestinal epithelial apoptosis.

M. Huang, Shufeng Zhou, S. Chan, 2006, Toxicology and applied pharmacology.

Identification of active compounds from medicinal plant extracts using gas chromatography-mass spectrometry and multivariate data analysis.

C. Yap, J. Ching, Chay-Hoon Tan, 2012, Journal of separation science.

Adverse events associated with the use of complementary medicine and health supplements: An analysis of reports in the Singapore Pharmacovigilance database from 1998 to 2009

H. Koh, D. Patel, C. Chan, 2012, Clinical toxicology.

Botanical Medicine and Natural Products Used for Erectile Dysfunction.

G. Anand, H. Koh, Valerie Jia-En Sin, 2020, Sexual medicine reviews.

Effects of Vitex trifolia L. leaf extracts and phytoconstituents on cytokine production in human U937 macrophages

S. Neo, Deepika Singh, H. Wee, 2020, BMC Complementary Medicine and Therapies.

Quantification of ginsenosides Rh4 and Rk3 in rat plasma by liquid chromatography-tandem mass spectrometry: application to a pre-clinical pharmacokinetic study.

H. Koh, D. Patel, Hai‐Shu Lin, 2012, Journal of mass spectrometry : JMS.

Protective effects of ginseng on neurological disorders

E. Ling, A. A. Farooqui, T. Farooqui, 2015, Front. Aging Neurosci..

The analysis of heavy metals in Chinese herbal medicine by flow injection-mercury hydride system and graphite furnace atomic absorption spectrometry.

W. Chui, Xudong Yuan, H. Koh, 2009, Phytochemical analysis : PCA.

Analysis of adulterants in a traditional herbal medicinal product using liquid chromatography-mass spectrometry-mass spectrometry.

M. Holmes, A. Lau, H. Koh, 2003, Journal of pharmaceutical and biomedical analysis.

β-Amyrin from Ardisia elliptica Thunb . is more potent than aspirin in inhibiting collagen-induced platelet aggregation

J. Ching, Chay-Hoon Tan, H. Koh, 2010 .

Safety and Quality Assessment of 175 Illegal Sexual Enhancement Products Seized in Red-Light Districts in Singapore

B. Bloodworth, H. Koh, M. Low, 2009, Drug safety.

Identification of Phytoconstituents in Leea indica (Burm. F.) Merr. Leaves by High Performance Liquid Chromatography Micro Time-of-Flight Mass Spectrometry

S. Neo, Deepika Singh, H. Koh, 2019, Molecules.

Evaluation of anti-proliferative activity of medicinal plants used in Asian Traditional Medicine to treat cancer.

S. Neo, Azhar Ali, Chay-Hoon Tan, 2019, Journal of ethnopharmacology.

A high performance liquid chromatography method for the simultaneous determination of arctiin, chlorogenic acid and glycyrrhizin in a Chinese proprietary medicine.

W. Chui, Xudong Yuan, H. Koh, 2005, Journal of pharmaceutical and biomedical analysis.

Screening of synthetic PDE-5 inhibitors and their analogues as adulterants: analytical techniques and challenges.

H. Koh, D. Patel, M. Low, 2014, Journal of pharmaceutical and biomedical analysis.

Isolation and characterization of propoxyphenyl linked sildenafil and thiosildenafil analogues in health supplements.

H. Koh, M. Low, C. Kee, 2012, Journal of pharmaceutical and biomedical analysis.

Isolation and identification of thiohomosildenafil and thiosildenafil in health supplements.

B. Bloodworth, H. Koh, P. Zou, 2008, Journal of pharmaceutical and biomedical analysis.

Ethnobotanical survey of usage of fresh medicinal plants in Singapore.

S. Neo, Chay-Hoon Tan, H. Koh, 2014, Journal of ethnopharmacology.

In vitro Antimalarial Evaluations and Cytotoxicity Investigations of Carica papaya Leaves and Carpaine

L. Rénia, H. Ho, B. Russell, 2019, Natural Product Communications.

Herb-Drug Interactions

Wei Duan, Paul Wan Sia Heng, Sui Yung Chan, 2012, Drugs.

Retrospective Study of Reported Adverse Events Due to Complementary Health Products in Singapore From 2010 to 2016

Adena Theen Lim, H. Koh, D. Patel, 2018, Front. Med..

A Review of Botanical Characteristics, Traditional Usage, Chemical Components, Pharmacological Activities, and Safety of Pereskia bleo (Kunth) DC

Chay-Hoon Tan, H. Koh, S. Zareisedehizadeh, 2014, Evidence-based complementary and alternative medicine : eCAM.

Herb-drug interactions: a literature review.

Wei Duan, Paul Wan Sia Heng, Sui Yung Chan, 2005, Drugs.

Chemical fingerprinting of Isatis indigotica root by RP-HPLC and hierarchical clustering analysis.

H. Koh, Y Hong, Y. Hong, 2005, Journal of pharmaceutical and biomedical analysis.

Ultra-performance liquid chromatography/time-of-flight mass spectrometry based metabolomics of raw and steamed Panax notoginseng.

Hwee-Ling Koh, E. Chan, A. Lau, 2007, Rapid communications in mass spectrometry : RCM.

Synthesis and in vitro antimalarial activity of some indolo[3,2-c]quinolines

J. Phillipson, H. Koh, M. J. O'neill, 1992 .

LC and LC-MS-MS analyses of undeclared codeine in antiasthmatic Chinese proprietary medicine.

M. Holmes, H. Koh, S. Woo, 2000, Journal of pharmaceutical and biomedical analysis.

HPLC and GC-MS screening of Chinese proprietary medicine for undeclared therapeutic substances.

H. Koh, S. Woo, S. Y. Liu, 2001, Journal of pharmaceutical and biomedical analysis.

Isolation and structural elucidation of dapoxetine as an adulterant in a health supplement used for sexual performance enhancement.

B. Bloodworth, H. Koh, M. Low, 2009, Journal of Pharmaceutical and Biomedical Analysis.

Structural elucidation of a PDE-5 inhibitor detected as an adulterant in a health supplement.

B. Bloodworth, H. Koh, P. Zou, 2008, Journal of pharmaceutical and biomedical analysis.

Identification of benzamidenafil, a new class of phosphodiesterase-5 inhibitor, as an adulterant in a dietary supplement.

B. Bloodworth, H. Koh, P. Zou, 2008, Journal of pharmaceutical and biomedical analysis.

Effects of water-soluble Ganoderma lucidum polysaccharides on the immune functions of patients with advanced lung cancer.

Shufeng Zhou, E. Chan, Wenbo Tang, 2005, Journal of medicinal food.

Oxaliplatin regulates expression of stress ligands in ovarian cancer cells and modulates their susceptibility to natural killer cell-mediated cytotoxicity.

S. Neo, H. Koh, S. Seow, 2015, International immunology.

Ginsenoside Rg1 modulates medial prefrontal cortical firing and suppresses the hippocampo-medial prefrontal cortical long-term potentiation

R. Rajkumar, G. Dawe, Chay-Hoon Tan, 2017, Journal of ginseng research.

Isolation and structural elucidation of flibanserin as an adulterant in a health supplement used for female sexual performance enhancement.

H. Koh, M. Low, C. Kee, 2012, Journal of pharmaceutical and biomedical analysis.

Medicinal Plants and Malaria: Applications, Trends, and Prospects

H. Kiat, H. Koh, R. Suwanarusk, 2016 .

Electrospray tandem mass spectrometric investigations of tadalafil and its analogue.

H. Koh, P. Zou, M. Low, 2006, Rapid communications in mass spectrometry : RCM.

Chinese Proprietary Medicine in Singapore

H. Koh, S. Woo, H L Koh, 2000, Drug safety.

Isolation and characterization of a tadalafil analogue, N-cyclopentyl nortadalafil in health supplement.

H. Koh, M. Low, Yimin Xu, 2016, Journal of pharmaceutical and biomedical analysis.

Structural elucidation of propoxyphenyl isobutyl aildenafil, adulterant in a health supplement using high-resolution Orbitrap mass spectrometry.

B. Bloodworth, H. Koh, M. Low, 2014, Journal of pharmaceutical and biomedical analysis.

Identification of a new sildenafil analogue in a health supplement.

H. Koh, M. Low, Xiaowei Ge, 2011, Journal of pharmaceutical and biomedical analysis.

Quality Control and Quality Assurance of Phytomedicines

Wai-Ping Yau, Cheong Hian Goh, Hwee-Ling Koh, 2015 .

Isolation and structural elucidation of a new sildenafil analogue from a functional coffee

B. Bloodworth, H. Koh, M. Low, 2013, Analytical and Bioanalytical Chemistry.

Effects of Leea indica leaf extracts and its phytoconstituents on natural killer cell-mediated cytotoxicity in human ovarian cancer

S. Neo, Deepika Singh, Azhar Ali, 2023, BMC Complementary Medicine and Therapies.

Detection of Sildenafil Analogues in Herbal Products for Erectile Dysfunction

H. Koh, P. Zou, M. Low, 2006, Journal of toxicology and environmental health. Part A.

Isolation and identification of hydroxythiohomosildenafil in herbal dietary supplements sold as sexual performance enhancement products

B. Bloodworth, H. Koh, Y. Zeng, 2009, Food additives & contaminants. Part A, Chemistry, analysis, control, exposure & risk assessment.

Structural identification of a new acetildenafil analogue from pre-mixed bulk powder intended as a dietary supplement

E. Chan, H. Koh, P. Zou, 2006, Food additives and contaminants.

Letter: Liquid Chromatography Ion-Trap Time-of-Flight Mass Spectrometric Study on the Fragmentation of an Acetildenafil Analogue

H. Koh, P. Zou, M. Low, 2007, European Journal of Mass Spectrometry.

A randomized, double-blind, placebo- controlled study on the anti-haemostatic effects of Curcuma longa, Angelica sinensis and Panax ginseng.

H. Ng, H. Koh, L. Lee, 2017, Phytomedicine : international journal of phytotherapy and phytopharmacology.

Ethnobotanical survey of usage of fresh medicinal plants in Singapore.

S. Neo, Chay-Hoon Tan, H. Koh, 2014, Journal of ethnopharmacology.