chemistryUSM

New Image of Chemistry School

2011-11-02T13:55:00.002+08:00

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Blogger Pictures

Seminar of Visiting Professor Dr. Meledath Govindan

2011-11-02T10:49:00.001+08:00

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Seminar of Visiting Professor Dr. Meledath Govindan

Use of NMR inStructure Elucidation of Natural Products: A Novel Polyacetylene from Centellaasiatica

Structure elucidationis an important part of natural products chemistry. Very often chemists isolate a pure compoundfrom a natural source – e.g., crude extract from plants, marine organisms orbacterial broth, and it would be necessary to know the structure of thecompound. For the past 3-4 decades NMR(nuclear magnetic resonance) spectroscopy has become the primary tool toachieve this. In this presentation, Professor Govindan will illustrate theprocess through the example of determining the structure of a unique, highlyoxygenated polyacetylene isolated from the Malaysian medicinal herb, Centella asiatica. He will illustrate the use of various NMRspectra, such as proton and carbon NMR, COSY, TOCSY, HMQC and HMBC inestablishing the carbon connectivities and functional group placements. The role of IR (infrared) spectroscopy and MS(mass spectrometry) will also be illustrated.

BriefBiographical Sketch – Dr. Meledath Govindan

Meledath Govindan iscurrently a Professor of Chemistry at FitchburgState Universityin Fitchburg, Massachusetts, USwhere his primary responsibility has been for teaching Organic Chemistry at theundergraduate level. His researchinterest is in natural products chemistry and he has been collaborating withthe Biomaterial Sciences and Engineering Laboratory of the Massachusetts Institute of Technology, Cambridge, MAwhere he holds the position of Visiting Professor. Prior to his current position at FSU he wasProfessor of Chemistry and Physical Sciences Coordinator at the University ofthe Virgin Islands, St. Thomas, USA, where he conducted extensive research onmarine natural products with funding from the National Institutes of Health,USA.
Dr. Govindan received his Ph.D. in chemistry from the University of Georgia,Athens, USAand the M.S. in organic chemistry from the University of Kentucky. His undergraduate degree is from the University of Calicut,Kerala, India. Dr. Govindan has published over 15 papers inpeer-reviewed journals and made over 25 scientific presentations. He has been active in developing andimplementing new student-centered teaching methodologies and has made extensiveuse of techniques, such as POGIL (Process Oriented Guided Inquiry Learning) andCPR (Calibrated Peer Review). He iscurrently involved in developing ways to measure learning outcomes in chemistrycourses and the chemistry program at FSU. Dr. Govindan also serves as the pre-medical advisor for his universityand is involved in guiding students in getting admission to medical, dental,veterinary, pharmacy, optometry and other post-graduate health professionalprograms. He served six years on theNashoba Regional School Committee as a member elected from his hometown of Lancaster, MAand also served on the Board of Directors of Nashoba Robotics, a non-profitorganization that supports the robotics program in the Nashoba schools.

Seminar of Visiting Professor Hassan Y. Aboul-Enein

2011-10-18T09:04:00.000+08:00

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Seminar of Visiting Professor Hassan Y. Aboul-Enein

Fluorinated HPLC Phases — Looking Beyond C18 for Reversed-Phase

Professor Hassan Y. Aboul-Enein

Pharmaceutical and Medicinal Chemistry Department, National Research Centre, Dokki, Cairo 12311, EGYPT

E-mail: haboulenein@yahoo.com and enein@gawab.com

Reversed-phase high performance liquid chromatography (HPLC) is one of the most utilized forms of chromatography. The C8 and C18 stationary phases are the most widely used for reversed-phase HPLC. However, analysts occasionally encounter difficult separations for which selectivity, ruggedness or reproducibility are not obtained easily using traditional C8 and C18 phases. These separations might require the use of novel or selective phases that interact with analytes in a manner different than C8 or C18 phases .

¢ These types of stationary phases separate compounds based upon selective stationary phase interactions such as steric recognition charge transfer or π–π interactions. One class of selective or novel phases that have been used for a variety of separations are fluorinated phases

¢ Fluorinated phases can provide different elution orders, leading to enhanced selectivity for difficult-to-separate compounds

¢ Fluorinated phases also offer the possibility to use simpler mobile phases and avoid using extreme pH conditions and complex mobile-phase preparations.

¢ Fluorinated packings also exhibit excellent selectivity for compounds having hydroxyl, nitro and other polar groups in large ring systems.

This presentation will present several types of fluorinated stationary phases and show several examples of how this extra selectivity has been used to achieve chromatographic separation for a broad range of applications.

Chemistry Night 2011

2011-03-06T15:17:00.000+08:00

Malam Kimia 2011 telah diadakan pada 5 Mac 2011. Majlis telah dirasmikan oleh Timbalan Naib Canselor HEPP Profesor Dato' Omar Osman dan Dekan PPPS Kimia Profesor Wan Ahmad Kamil Mahmood.

From Malam Kimia 2011

New NMR 500 Arrived at PPS Kimia Feb 2011

2011-02-11T21:28:00.000+08:00

From New NMR 500 2011

Perbincangan Projek Air Bersama UKM. Jan 2011

2011-02-02T21:39:00.000+08:00

From Water Project UKM 2011

RSC Book Exhibition, Feb 2011

2011-01-26T11:18:00.000+08:00

From RSC Book Exhibition 2011

Lawatan dari Lung Hwa University, Taiwan. Jan 2011

2010-12-31T11:20:00.000+08:00

From Lawatan Lung Hwa Uni. Taiwan 2011

Postgraduate Students Catalysts Chemistry

2010-12-28T15:26:00.000+08:00

From Group Foto Inorganic 2010

Chemistry Outreach Programme

2010-12-15T15:21:00.000+08:00

From Chemistry Outreach Programme, National University of Singapore

Lawatan dari Universiti Teknologi Mara

2010-12-04T15:56:00.000+08:00

From Lawatan Univ. Teknologi Mara 2010

Kunjungan Delegasi Kementrian Pendidikan Loas Ke USM

2010-10-28T14:39:00.000+08:00

From New Folder

Majlis perjumpaan dengan delegasi Kementrian Pendidikan Loas ke Malaysia pada 26 Oktober 2010 bertempat di Bilik Persidangan Pusat Pengajian Sains Kimia, USM.

Seminar Tahun Akhir & Seminar Kerjaya

2010-05-12T15:47:00.000+08:00

11 Mei 2010, TAHNIAH dan ribuan terima kasih kepada semua yang terlibat dalam usaha menjayakan Seminar Tahun Akhir & Seminar Kerjaya. 2010 adalah tahun kedua USM melalui Program APEX dan PPS Kimia juga terus memainkan peranan dalam menjayakan aspirasi USM. Sehubungan dengan ini PPS Kimia sejak beberapa tahun yang lalu telah membuat ketetapan untuk menyediakan peluang kepada semua pelajar yang berkemampuan untuk menjalankan projek tahun akhir agar para graduan melalui pendedahan kepada kaedah penyelidikan dan kemahiran insaniah (soft skills). Sesungguhnya dalam masa dua semester projek tahun akhir, pelajar bukan sahaja didedahkan kepada kaedah penyelidikan kimia malah mereka juga berhadapan dengan pelbagai cabaran seperti pengurusan masa, bekerja secara berkumpulan dan bekerjasama dalam menggunakan kemudahan yang terhad. Para pensyarah bersama-sama mejayakan usaha ini dengan perolehan geran bagi pembiayaan projek penyelidikan masing-masing. Akhir kata, kepada para pelajar yang akan berijazah pada Konvokesyen Ogos 2010, kami di PPS Kimia mengucapkan Selamat Maju Jaya dalam kerjaya masing-masing, semoga buku ini dapat memberikan kenangan manis semasa di USM. Terima kasih dan wassalam.

Malam Pesada Kencana 2009

2009-11-26T12:29:00.000+08:00

From Pesada Kencana 2009

Research Colloquium 2009

2009-11-11T13:47:00.000+08:00

Malam Kimia 2009....

2009-08-13T18:15:00.000+08:00

Hari Keluarga 2009

2009-08-13T18:07:00.001+08:00

Video BBQ PPSKimia 2009

2009-07-26T04:23:00.000+08:00

BBQ PPSKimia

2009-07-26T03:07:00.000+08:00

BBQ PPSK (komuniti KIMIA) 2009 telah berlangsung pada jumaat, 24/07/09 (2 shaban, 1430H) di Dataran Kimia, USM.

Amnya, BBQ PPSK merupakan majlis santai yang melibatkan hampir semua masyarakat PPSK amnya, pelajar siswazah khususnya. Diadakan setahun sekali, jarang kami melepaskan peluang untuk bersama-sama memeriahkannya.

BBQ PPSK sebegini diadakan atas semangat setiakawan, kerjasama bersama bagi memupuk silaturahim dan keharmonian antara kami. Tradisinya, Prof. Bahruddin Saad dan pihak AJK akan merancang perjalanan majlis dan rakan-rakan lain akan bergotong royong menjayakannya bermula dari persediaan awal hingga ke akhir, baik dari segi makanan, minuman dan penempatan di lokasi BBQ PPSK.

Di sebelah sana, kawasan BBQ, sibuknya abang-abang dan kakak-kakak memasak bersilih ganti. Cukup meriah tahun ini. Semua yang terlibat menunjukkan kepuasan yang tak terhingga, biarpun letih. Alhamdullillah cuaca pada hari itu amat baik dan semua persiapan berjalan dengan lancar.

BBQ @ Kimia 2009

2009-07-25T19:22:00.000+08:00

Antara gelagat rakan-rakan yang sempat dirakam. Untuk melihat lagi gambar-gambar berikutnya, bolelah klik disini