Items where Author is "Ahmad , Farediah"

Jani, Nor Akmalazura and Sirat, Hasnah Mohd and Ahmad, Farediah and Aminudin, Nurul Iman (2021) New sesquiterpene dilactone and β-carboline alkaloid and the α-glucosidase inhibitory activity of selected phytochemicals from Neolitsea cassia (L.) Kosterm. Natural Product Research. pp. 1-9. ISSN 1478-6419 E-ISSN 1478-6427

Aminudin, Nurul Iman and Norazhar, Nadia Aziba and Ahmad, Farediah (2021) Development of HPLC method and quantification of amentoflavone from leaves extracts of three Calophyllum species. In: IKM Pahang Branch Online Symposium 2021 : Chemistry for Sustainable World, 16 Jan 2021, Google Meet. (Unpublished)

Aminudin, Nurul Iman and Norazhar, Nadia Aziba and Ahmad, Farediah (2021) Development of a HPLC method for quantification of amentoflavone in leaf extracts of three calophyllum species. Malaysian Journal of Chemistry, 23 (2). pp. 33-39. ISSN 1511-2292 E-ISSN 2550-1658

Bakhtiar, M. Taher and Wan Salleh, Wan Mohd Nuzul Hakimi and Alkhamaiseh, Suhaib Ibrahim and Ahmad, Farediah and Rezali, Mohd Fazlin and Darnis, Deny Susanti and Hasan, Choudhury Mahmood (2020) A new xanthone dimer and cytotoxicity from the stem bark of calophyllum canum. Zeitschrift für Naturforschung C, 1 (2). pp. 87-91. ISSN 0939-5075 E-ISSN 1865-7125

Wan Salleh, Wan Mohd Nuzul Hakimi and On, Shamsul and Ahmad, Farediah and Mohd Sirat, Hasnah and Bakhtiar, M. Taher and Sarker, Satyajit Dey and Nahar, Lutfun (2020) A new xanthone and a new benzophenone from the roots of Garcinia hombroniana. Phytochemistry Letters, 35. pp. 216-219. ISSN 1874-3900

Aminudin, Nurul Iman and Ahmad, Farediah and Bakhtiar, M. Taher (2019) Antibacterial and antioxidant activities of extracts from Calophyllum ferrugineum and Calophyllum incrassatum = Aktiviti antibakteria dan antioksidan terhadap ekstrak daripada calophyllum ferrugineum dan calophyllum incrassatum. Malaysian Journal of Analytical Sciences, 23 (4). pp. 637-647. ISSN 1394-2506

Ramli, Siti Nurhafizah and Aminudin, Nurul Iman and Ahmad, Farediah and Darnis, Deny Susanti (2019) Comparison of extraction techniques for three Calophyllum species and their antioxidant activity = Perbandingan teknik pengekstrakan untuk tiga spesies Calophyllum dan aktiviti antioksidan. Malaysian Journal of Analytical Sciences, 23 (4). pp. 586-594. ISSN 1394 - 2506

Aminudin, Nurul Iman and Ahmad, Farediah and Bakhtiar, M. Taher and Deny Susanti, Darnis (2018) Antibacterial and antioxidant activities of extracts from Calophyllum ferrugineum and Calophyllum incrassatum. In: International Conference of Analytical Sciences (SKAM31), 17th-19th August 2018, Vistana Hotel, Kuantan, Pahang. (Unpublished)

Ramli, Siti Norhafizah and Aminudin, Nurul Iman and Ahmad, Farediah and Darnis, Deny Susanti (2018) Comparison of extraction techniques for three Calophyllum species and their antioxidant activity. In: International Conference of Analytical Sciences (SKAM31), 17th-19th August 2018, Vistana Hotel, Kuantan, Pahang. (Unpublished)

Jani, Nor Akmalazura and Mohd Sirat, Hasnah and Ahmad, Farediah and Abed, Salam Ahmed and Aminudin, Nurul Iman (2018) Chemical constituents of the stems of Neolitsea kedahensis Gamble. Phytochemistry Letters, 26. pp. 12-15. ISSN 1874-3900

Aminudin, Nurul Iman and Ahmad, Farediah and Bakhtiar, M. Taher and Mohamed Zulkifli, Razauden (2018) Isolation, cytotoxic and alpha-glucosidase inhibitory activities of new coumarins from calophyllum incrassatum. In: 34th International Conference on Natural Products 2018 (ICNP 2018), 19th-21st March 2018, Penang, Malaysia. (Unpublished)

Wan Salleh, Wan Mohd Nuzul Hakimi and Nik Sazali, Nik Shazwani Afifah and Ahmad, Farediah and Bakhtiar, M. Taher (2017) Biflavonoids from the leaves and stem bark of Garcinia griffithii and their biological activities. Marmara Pharmaceutical Journal, 21 (4). pp. 889-897. ISSN 1309-0801

Bakhtiar, M. Taher and Mohamed Amiroudine, Mohamed Zaffar Ali and Md. Jaffri, Juliana and Amri, Mohamad Shahreen and Darnis, Deny Susanti and Abd Hamid, Shafida and Rezali, Mohd Fazlin and Mahmood Hasan, Choudhury and W Read, Roger and Ahmed, Qamar Uddin and Ahmad, Farediah (2017) A lignan with glucose uptake activity in 3T3-L1 adipocytes from the stem bark of Knema patentinervia. Pakistan Journal of Pharmaceutical Science, 30 (4). pp. 1335-1339. ISSN 1011-601X

On, Shamsul and Wan Salleh, Wan Mohd Nuzul Hakimi and Ahmad, Farediah and Sirat, Hasnah M and Bakhtiar, M. Taher (2017) Cytotoxicity of triterpenes from the leaves of Garcinia prainiana King (Guttiferae). Marmara Pharmaceutical Journal: an international peer-reveiwed open acces journal of pharmacy and pharmaceutical sciences., 21 (1). pp. 127-131. ISSN 1309-0801

Hashim, Nur Athirah and Ahmad, Farediah and Jani, Nor Akmalazura and Darnis, Deny Susanti (2017) In vitro antioxidant, antityrosinase, antibacterial and cytotoxicity activities of the leaf and stem essential oil from piper magnibaccum C. DC. Journal of Essential Oil Bearing Plants, 20 (1). pp. 223-232. ISSN 0972-060X E-ISSN 0976-5026

Aminudin, Nurul Iman and Ahmad, Farediah and Bakhtiar, M. Taher and Mohamed Zulkifli, Razauden (2016) Cytotoxic and antibacterial activities of constituents from Calophyllum ferrugineum ridley. Records of Natural Products, 10 (5). pp. 649-653. ISSN 1307-6167

Aminudin, Nurul Iman and Ahmad, Farediah and Bakhtiar, M. Taher and Mohamed Zulkifli, Razauden (2016) Incrassamarin A–D: Four new 4-substituted coumarins from Calophyllum incrassatum and their biological activities. Phytochemistry Letters, 16. pp. 287-293. ISSN 1874-3900

On, Shamsul and Aminudin, Nurul Iman and Ahmad, Farediah and Mohd Sirat, Hasnah and Bakhtiar, M. Taher (2016) Chemical constituents from stem bark of Garcinia prainiana and their bioactivities. International Journal of Pharmacognosy and Phytochemical Research, 8 (5). pp. 756-760. ISSN 0975-4873

Aminudin, Nurul Iman and Ahmad, Farediah and Bakhtiar, M. Taher and Mohamed Zulkifli, Razauden (2016) Coumarins and chromanones from two Calophyllum species and their bioactivities. In: International Conference on Natural Products 2016 (ICNP 2016), 15th-17th March 2016, Kuala Terengganu, Terengganu, Malaysia. (Unpublished)

Abdul Aziz, Huwaida and Bakhtiar, Muhammad Taher and Sh Ahmed, Afnan and Wan Sulaiman, Wan Mohd. Azizi and Darnis, Deny Susanti and Roy Chowdhury, Shiplu and Ahmad, Farediah and Zakaria, Zainul Amiruddin (2016) In Vitro and In Vivo wound healing studies of standardized extract of Centella asiatica. In: International Conference on Natural Products 2016 (ICNP 2016), 15th-17th March 2016, Kuala Terengganu, Terengganu, Malaysia. (Unpublished)

Ahmed, Qamar Uddin and Hasan, Md. Mahmudul (Stu) and Mat So'ad, Siti Zaiton and Tengku Zakaria, Tengku Muhamad Faris Syafiq and Bakhtiar, M. Taher and Latip, Jalifah and Ahmad, Farediah and Sarian, Murni Nazira (2016) Isolation of antidiabetic compounds from tetracera Indica. In: International Conference on Natural Products 2016 (ICNP 2016), 15th-17th March 2016, Kuala Terengganu, Terengganu, Malaysia. (Unpublished)

Aminudin, Nurul Iman and Ahmad, Farediah and Bakhtiar, M. Taher and Mohamed Zulkifli, Rezauden (2016) Cytotoxic and antibacterial evaluation of coumarins and chromanone acid from Calophyllum symingtonianum. Journal of Applied Pharmaceutical Science, 6 (1). pp. 23-27. ISSN 2231-3354

Hashim, Nur Athirah and Ahmad, Farediah and Darnis, Deny Susanti (2016) Antioxidant and antityrosinase activities of piper maingayi HK. essential oil. Jurnal Teknologi, 78 (1). pp. 169-174. ISSN 0127-9696 E-ISSN 2180-3722

Bakhtiar, M. Taher and Aminuddin, Amnani and Darnis, Deny Susanti and Aminudin, Nurul Iman and On, Shamsul and Ahmad, Farediah and Hamidon, Hanisuhana (2016) Cytotoxic, anti-inflammatory and adipogenic effects of inophyllum D, calanone,isocordato-oblongic acid, and morelloflavone on cell lines. Natural Products Sciences, 22 (2). pp. 122-128. ISSN 1226-3907 E-ISSN 2288-9027

Hasan, Md. Mahmudul (Stu) and Mat So'ad, Siti Zaiton and Shafiq, Tengku Muhammad Faris and Bakhtiar, M. Taher and Latip, Jalifah and Ahmad, Farediah and Sarian, Murni Nazira and Tunna, Tasnuva Sarwar and Ahmed, Qamar Uddin (2015) Phytochemical and in vitro antidiabetic investigations of stems of Tetracera Indica Merr., a Malaysian traditional medicinal plant. In: 8th Asian Network of Research on Antidiabetic Plants (ANRAP) International Seminar 2015, 23rd-25th Nov. 2015, Grand Bluewave Hotel, Shah Alam, Selangor. (Unpublished)

Aminudin, Nurul Iman and Ahmad, Farediah and Bakhtiar, M. Taher (2015) Antioxidant, cholinesterase and tyrosinase inhibitory activities of calophyllum symingtonianum and calophyllum depressinervosum. In: International Conference on Natural Products 2015, 24-25 March 2015, Double Tree by Hilton, Johor Bahru. (Unpublished)

Al-Zikri, Putri Nurhidayah and Bakhtiar, M. Taher and Darnis, Deny Susanti and Rezali, Mohd Fazlin and Read, Roger W and Sohrab, Md. Hossain and Hasan, Choudhury Mahmood and Ahmad, Farediah (2015) Bioguided isolation of cytotoxic triterpenoids from the stem of luvunga scandens. In: International Conference on Natural Products 2015, 24-25 March 2015, Double Tree by Hilton, Johor Bahru.

Aminudin, Nurul Iman and Ahmad, Farediah and Bakhtiar, M. Taher (2015) In vitro antioxidant, cholinesterase and tyrosinase inhibitory activities of calophyllum symingtonianum and calophyllum depressinervosum (guttiferae). Journal of Coastal Life Medicine, 3 (2). pp. 126-131. ISSN 2309-6152 (O), 2309-5288 (P)

Aminudin, Nurul Iman and Ahmad, Farediah and Bakhtiar, M. Taher and Mohamed Zulkifli, Razauden (2015) α-glucosidase and 15-lipoxygenase inhibitory activities of phytochemicals from calophyllum symingtonianum. Natural Products Communications, 10 (9). pp. 1585-1587. ISSN 1555-9475 (O), 1934-578X (P),

Aminudin, Nurul Iman and Ahmad, Farediah and Bakhtiar, M. Taher (2014) Anti bacterial activity of pyranocoumarins and crude extracts of Calophyllum symingtonianum. In: International Conference on Natural Products 2014, 18th-19th March 2014, Palm Garden Hotel, IOI Resorts, Putrajaya, Malaysia.

Al Zikri, Putri Nurhidayah and Bakhtiar, M. Taher and Darnis, Deny Susanti and Rezali, Mohd Fazlin and Read, Roger W and Sohrab, Md. Hossain and Hasan, Choudhury Mahmood and Ahmad, Farediah (2014) Cytotoxic tirucallane triterpenes from the stem of luvunga scandens. Brazilian Journal of Pharmacognosy, 24 (5). pp. 561-564. ISSN 0102-695X

On, Shamsul and Ahmad, Farediah and M Sirat , Hasnah and Bakhtiar, M. Taher (2013) Chemical constituents and bioactivities of garcinia prainiana. In: International Conference on Natural Products 2013 (ICNP 2013), 4-6 Mar 2013, Shah Alam.

Alkhamaiseh, Suhaib Ibrahim and Bakhtiar, M. Taher and Ahmad, Farediah and Qaralleh, Haitham and Althunibat, Osama Yousef and Darnis, Deny Susanti and Solachuddin Jauhari, Arief Ichwan (2012) The phytochemical content and antimicrobial activities of Malaysian Calophyllum canum (stem bark). Pakistan Journal of Pharmaceutical Sciences, 25 (3). pp. 555-563. ISSN 11011-601X

Darnis, Deny Susanti and Bakhtiar, M. Taher and Nissad, Attoumani and Ahmad, Farediah (2011) Free radical scavenging and antibacterial activities of Malaysian guttiferae plants. Journal of Medicinal Plants Research, 5 (31). pp. 6714-6718. ISSN 1996-0875

On, Shamsul and Ahmad, Farediah and Mohd Sirat, Hasnah and Bakhtiar, M. Taher (2011) Phytochemistry and antioxidant activity of garcinia prainiana. In: International Conference on Natural products (ICNP 2011), 14-16 November 2011, Palm garden Resort, Putrajaya.

Alkhamaiseh, Suhaib Ibrahim and Bakhtiar, M. Taher and Ahmad, Farediah and Arief Ichwan, Solachuddin Jauhari and Darnis, Deny Susanti (2011) Antioxidant and cytotoxic activities of Calophyllum rubiginosum. International Journal of Phytomedicine, 3 (2). pp. 157-163. ISSN 0975-0185 (P)

Bakhtiar, M. Taher and Darnis, Deny Susanti and Rezali, Mohd Fazlin and Ahmad Zohri, Farah Syahidah and Solachuddin Jauhari, Arief Ichwan and Alkhamaiseh, Suhaib Ibrahim and Ahmad, Farediah (2011) Chemical constituents and bioactivities of Garcinia malaccensis Hk.f. In: International Conference on Natural Products, 14-16 November 2011, Palm garden Resort, Putrajaya, Malaysia.

Nik Sazali, Nik Shazwani Afifah and Ahmad, Farediah and Bakhtiar, M. Taher (2011) Chemical constituents and biological activities of the leaves of Garcinia griffithii(Guttiferae). In: International Conference on Natural Products (ICNP 2011): Metabolomics - A New Frontier in Natural Products Science, 14-16 November 2011, Putrajaya, Malaysia.

ALkhamaiseh, Suhaib Ibrahim and Bakhtiar, M. Taher and Ahmad, Farediah (2011) The phytochemical contents and antimicrobial activities of Malaysian Calophyllum rubiginosum. American Journal of Applied Sciences, 8 (3). pp. 201-205. ISSN 1546-9239

M. Sirat, Hasnah and Darnis, Deny Susanti and Ahmad, Farediah and Takayama, Hiromitsu and Kitajima, Mariko (2010) Amides, triterpene and flavonoids from the leaves of Melastoma malabathricum L. Journal of Natural Medicines, 64 (4). pp. 492-495. ISSN 1340-3443

Bakhtiar, M. Taher and Darnis, Deny Susanti and Arief Ichwan, Solachuddin Jauhari and Ahmad, Farediah (2010) Antioxidant activity of leaves of Calophyllum Rubiginosum. American Journal of Applied Sciences , 7 (10). pp. 1305-1309. ISSN 1554-3641(O), 1546-9239 (P)

Alkhamaiseh, Suhaib Ibrahim and Bakhtiar, M. Taher and Ahmad , Farediah (2010) Phytochemical and biological activity study of Calophyllum canum. In: 3rd International Conference on Advancement in Science and Technology (iCAST) 2010, 27-29 November 2010, Vistana Hotel, Kuantan, Pahang.

Darnis, Deny Susanti and Mohd. Sirat, Hasnah and Ahmad, Farediah and Mat Ali, Rasadah (2008) Bioactive constituents from the leaves of Melastoma Malabathricum L. Jurnal Ilmiah Farmasi, 5 (1). pp. 1-8.