Pub Date : 2017-10-01DOI: 10.17576/MJAS-2017-2105-01
D. Kanakaraju, Nurul Liyana Ahmad, Noorfaezah Mohd Sedik, Long GanHsien, Guan TayMeng, Chin LimYing
{"title":"Prestasi fotopemangkinan dan degradasi foto-fenton menggunakan sinar suria ke atas efluen kilang minyak kelapa sawit","authors":"D. Kanakaraju, Nurul Liyana Ahmad, Noorfaezah Mohd Sedik, Long GanHsien, Guan TayMeng, Chin LimYing","doi":"10.17576/MJAS-2017-2105-01","DOIUrl":"https://doi.org/10.17576/MJAS-2017-2105-01","url":null,"abstract":"","PeriodicalId":22844,"journal":{"name":"The Malaysian Journal of Analytical Sciences","volume":"26 1","pages":"996-1007"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83329969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-10-01DOI: 10.17576/MJAS-2017-2105-08
Siti Rasila Ainaa Mohd Rasli, Ishak Ahmad, Mohamad Azwani Shah Mat Lazim, Ainon Hamzah
Cellulose from oil palm fronds (OPF) was extracted using a cost-effective method combining physical treatment (high pressure steaming) and repeated chemical treatments (alkali and bleaching). Alkali and bleaching treatments were performed using low concentrations of sodium hydroxide and sodium chlorite, respectively. High levels of cellulose were successfully extracted, with 4 grams of cellulose for every 10 grams of raw oil palm fronds. The morphology of the cellulose was investigated using variable pressure scanning electron microscope (VPSEM). Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and thermogravimetric analyser (TGA) were used for structural analysis. The extracted cellulose was found to have smaller diameter (8 – 10 μm) and smoother surface compared to the untreated fibres. The results from FTIR, XRD and TGA indicate that the hemicelluloses and lignin were extensively removed from the isolated cellulose. Alkali treatment helped in removal of hemicelluloses, while bleaching assisted in delignification. The extracted cellulose showed high crystalline index of 68.75% and degradation temperature of 350 C resulted from removal of lignin and hemicelluloses via alkali and bleaching treatments.
{"title":"Pengekstrakan dan pencirian selulosa daripada bahan buangan pertanian - Pelepah kelapa sawit","authors":"Siti Rasila Ainaa Mohd Rasli, Ishak Ahmad, Mohamad Azwani Shah Mat Lazim, Ainon Hamzah","doi":"10.17576/MJAS-2017-2105-08","DOIUrl":"https://doi.org/10.17576/MJAS-2017-2105-08","url":null,"abstract":"Cellulose from oil palm fronds (OPF) was extracted using a cost-effective method combining physical treatment (high pressure steaming) and repeated chemical treatments (alkali and bleaching). Alkali and bleaching treatments were performed using low concentrations of sodium hydroxide and sodium chlorite, respectively. High levels of cellulose were successfully extracted, with 4 grams of cellulose for every 10 grams of raw oil palm fronds. The morphology of the cellulose was investigated using variable pressure scanning electron microscope (VPSEM). Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and thermogravimetric analyser (TGA) were used for structural analysis. The extracted cellulose was found to have smaller diameter (8 – 10 μm) and smoother surface compared to the untreated fibres. The results from FTIR, XRD and TGA indicate that the hemicelluloses and lignin were extensively removed from the isolated cellulose. Alkali treatment helped in removal of hemicelluloses, while bleaching assisted in delignification. The extracted cellulose showed high crystalline index of 68.75% and degradation temperature of 350 C resulted from removal of lignin and hemicelluloses via alkali and bleaching treatments.","PeriodicalId":22844,"journal":{"name":"The Malaysian Journal of Analytical Sciences","volume":"9 1","pages":"1065-1073"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87842054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-10-01DOI: 10.17576/MJAS-2017-2105-09
M. S. Norashikin, Hazilia Hussain, H. Hassan, N. C. Dom, M. R. R. Ikhwan
Photolytic degradation of imazapyr and imazapic in aqueous solutions (pH 3, 7 and 9) and soil under direct sunlight were studied. A total of 0.1 mL of aqueous solutions containing herbicides were collected at 0, 1, 2 and 3 days and were directly analyzed using high performance liquid chromatography equipped with ultraviolet detector (HPLC-UV) without further clean-up process. Soils that were treated with herbicides were sampled at seven different days (0, 1, 5, 10, 16, 23 and 30). The photolytic results showed that imazapyr and imazapic degraded faster in solutions compared to soils (> 90%). Photolysis of imidazolinone herbicides became more effective as the pH value increased. The half-lives for imazapyr and imazapic degradation on soil surface under sunlight were calculated at 126 days and 85.56 days, respectively. Low degradation of imazapyr and imazapic in soil becomes a concern since it may contribute to the persistency of imidazolinone herbicides in this media. The use of these herbicides should be planned well to reduce the risk of herbicides leaching into groundwater and posing risk to non-target crops
{"title":"Degradation of imazapyr and imazapic in aqueous solutions and soil under direct sunlight.","authors":"M. S. Norashikin, Hazilia Hussain, H. Hassan, N. C. Dom, M. R. R. Ikhwan","doi":"10.17576/MJAS-2017-2105-09","DOIUrl":"https://doi.org/10.17576/MJAS-2017-2105-09","url":null,"abstract":"Photolytic degradation of imazapyr and imazapic in aqueous solutions (pH 3, 7 and 9) and soil under direct sunlight were studied. A total of 0.1 mL of aqueous solutions containing herbicides were collected at 0, 1, 2 and 3 days and were directly analyzed using high performance liquid chromatography equipped with ultraviolet detector (HPLC-UV) without further clean-up process. Soils that were treated with herbicides were sampled at seven different days (0, 1, 5, 10, 16, 23 and 30). The photolytic results showed that imazapyr and imazapic degraded faster in solutions compared to soils (> 90%). Photolysis of imidazolinone herbicides became more effective as the pH value increased. The half-lives for imazapyr and imazapic degradation on soil surface under sunlight were calculated at 126 days and 85.56 days, respectively. Low degradation of imazapyr and imazapic in soil becomes a concern since it may contribute to the persistency of imidazolinone herbicides in this media. The use of these herbicides should be planned well to reduce the risk of herbicides leaching into groundwater and posing risk to non-target crops","PeriodicalId":22844,"journal":{"name":"The Malaysian Journal of Analytical Sciences","volume":"22 1","pages":"1074-1079"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88910655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-08-01DOI: 10.17576/MJAS-2017-2104-18
M. I. Salehmin, Lorna Effery Minggu, Arifin Khuzaimah, Mohammad B. Kassim
{"title":"Kesan strategi pengkalsinan terhadap peningkatan fotoaktiviti nanowayar kuprous oksida yang disediakan menggunakan cara mudah untuk pembelahan air suria","authors":"M. I. Salehmin, Lorna Effery Minggu, Arifin Khuzaimah, Mohammad B. Kassim","doi":"10.17576/MJAS-2017-2104-18","DOIUrl":"https://doi.org/10.17576/MJAS-2017-2104-18","url":null,"abstract":"","PeriodicalId":22844,"journal":{"name":"The Malaysian Journal of Analytical Sciences","volume":"43 1","pages":"914-920"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86714259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-08-01DOI: 10.17576/MJAS-2017-2104-17
T. Saharuddin, Fairous Salleh, A. Samsuri, Norliza Dzakaria, R. Othaman, M. Kassim, M. Hisham, M. Yarmo
{"title":"Kesan penambahan rodium terhadap tindak balas penurunan ferum oksida di dalam atmosfera karbon monoksida","authors":"T. Saharuddin, Fairous Salleh, A. Samsuri, Norliza Dzakaria, R. Othaman, M. Kassim, M. Hisham, M. Yarmo","doi":"10.17576/MJAS-2017-2104-17","DOIUrl":"https://doi.org/10.17576/MJAS-2017-2104-17","url":null,"abstract":"","PeriodicalId":22844,"journal":{"name":"The Malaysian Journal of Analytical Sciences","volume":"47 1","pages":"907-913"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89922142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-08-01DOI: 10.17576/MJAS-2017-2104-03
Nur Shafiqa Abdullah, W. Ahmad, Noor Aziiraa Sabri
{"title":"Sebatian baru daripada bonjolan muda Hydnophytum formicarum","authors":"Nur Shafiqa Abdullah, W. Ahmad, Noor Aziiraa Sabri","doi":"10.17576/MJAS-2017-2104-03","DOIUrl":"https://doi.org/10.17576/MJAS-2017-2104-03","url":null,"abstract":"","PeriodicalId":22844,"journal":{"name":"The Malaysian Journal of Analytical Sciences","volume":"244 1","pages":"778-783"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77588241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-08-01DOI: 10.17576/MJAS-2017-2104-21
Norashikin Ahmad Zamanhuri, Norazah Abd Rahman, Noor Fitrah Abu Bakar
{"title":"Kesan pelbagai tahap kuasa dan nisbah berlainan buah terhadap air dalam pensterilan gelombang mikro buah kelapa sawit","authors":"Norashikin Ahmad Zamanhuri, Norazah Abd Rahman, Noor Fitrah Abu Bakar","doi":"10.17576/MJAS-2017-2104-21","DOIUrl":"https://doi.org/10.17576/MJAS-2017-2104-21","url":null,"abstract":"","PeriodicalId":22844,"journal":{"name":"The Malaysian Journal of Analytical Sciences","volume":"26 1","pages":"941-949"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84822550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-08-01DOI: 10.17576/MJAS-2017-2104-16
Masitah Abdul Halim Azizi, Norliza Dzakaria, Wan Nor Roslam Wan Isahak, M. Yarmo
{"title":"Kesan nikel ke atas mangkin nanoaloi dwilogam bagi penghasilan hidrogen","authors":"Masitah Abdul Halim Azizi, Norliza Dzakaria, Wan Nor Roslam Wan Isahak, M. Yarmo","doi":"10.17576/MJAS-2017-2104-16","DOIUrl":"https://doi.org/10.17576/MJAS-2017-2104-16","url":null,"abstract":"","PeriodicalId":22844,"journal":{"name":"The Malaysian Journal of Analytical Sciences","volume":"50 1","pages":"901-906"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90387602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-08-01DOI: 10.17576/MJAS-2017-2104-07
Siti Farahiyah Ahmad Shater, Noorfatimah Yahaya, Nur Nadhirah Mohamad Zain, Sharlina Mohamad, Farah Wahidah Mohd Hassan, Sazlinda Kamaruzaman, Nor Suhaila Mohamad Hanapi, Mazidatulakmam Miskam
{"title":"Kaedah pengekstrakan mikro ultrabunyi dengan bantuan surfaktan meningkatkan pengemulsian bergabung dengan kromatografi gas-spektrometri jisim bagi penentuan polisiklik aromatik hidrokarbon terpilih di dalam sampel akueus","authors":"Siti Farahiyah Ahmad Shater, Noorfatimah Yahaya, Nur Nadhirah Mohamad Zain, Sharlina Mohamad, Farah Wahidah Mohd Hassan, Sazlinda Kamaruzaman, Nor Suhaila Mohamad Hanapi, Mazidatulakmam Miskam","doi":"10.17576/MJAS-2017-2104-07","DOIUrl":"https://doi.org/10.17576/MJAS-2017-2104-07","url":null,"abstract":"","PeriodicalId":22844,"journal":{"name":"The Malaysian Journal of Analytical Sciences","volume":"60 1","pages":"810-819"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85878658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-08-01DOI: 10.17576/MJAS-2017-2104-20
Ahmad M. Ramli, M. Z. Razali, Norasikin Ahmad Ludin
{"title":"Peningkatan prestasi bagi sel suria pemeka warna menggunakan grafin oksida di dalam titanium dioksida sebagai fotoelektrod","authors":"Ahmad M. Ramli, M. Z. Razali, Norasikin Ahmad Ludin","doi":"10.17576/MJAS-2017-2104-20","DOIUrl":"https://doi.org/10.17576/MJAS-2017-2104-20","url":null,"abstract":"","PeriodicalId":22844,"journal":{"name":"The Malaysian Journal of Analytical Sciences","volume":"34 1","pages":"928-940"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82998527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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