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Studies on chemical, polyphenol content, flavonoid content, and antioxidant activity of sweet basil leaves (Ocimum basilicum L.)

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IOP Conference Series: Materials Science and engineering 2021年第1期1092卷

作者： V T Nguyen N Q Nguyen N Q N Thi C Q N Thi T T Truc P T B Nghi Center of Excellence for Biochemistry and Natural Products Nguyen Tat Thanh University Ho Chi Minh City Vietnam NTT Hi-Tech Institute Nguyen Tat Thanh University Ho Chi Minh City Vietnam College of Agriculture Can Tho University Can Tho City Vietnam College of Engineering Technology Can Tho University Can Tho City Vietnam

Sweet basil (Ocimum basilicum L.) is commonly used as an attractive flavor in Vietnamese cuisine and a valuable remedy in traditional medicine. The purpose of this study is to analyze the phytochemical profile, as well as to calculate the content of polyphenols and flavonoids and antioxidant activity of ethanolic and aqueous extracts from sweet basil leaves. The findings revealed that the leaves of sweet basil contained a wide range of pharmacologically active substances, such as alkaloids, coumarins, tannins, flavonoids, sugars, phenols, terpenoids and saponins. The total phenolic and flavonoid contents of ethanolic extract achieved 29.60 ± 1.64 mg GAE/g and 19.58 ± 0.93 mg QE/g, respectively. Furthermore, ethanolic extract displayed good antioxidant activities as shown in DPPH and ABTS radical scavenging methods, represented by IC50 of 91.31±4.28 µg/mL and 85.17 ±3.91µg/mL, respectively. These findings have shown that this plant is a potential source of natural antioxidants.

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Recent advances in commercial application of the rheometal process in China and Europe 15th

Recent advances in commercial application of the rheometal p...

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15th International conference on Semi-Solid Processing of Alloys and Composites, S2P 2018

作者： Jarfors, Anders E. W. Zheng, Jinchuan Chen, Liang Yang, Jie Jönköping University School of Engineering Department of Materials and Manufacturing Jönköping Sweden Institute of Semi-solid Metal Technology Jiangle County Sanming City China RheoMet Light Metal Co. Ltd No. 55 Jiangle Economic Development Zone Sanming CityFujian Province353300 China KinRui Hi-Tech Co. Ltd No. 50 F1 Jishan Yangbu Village Guyong Town Jiangle County Sanming CityFujian Province353300 China

ISBN: (纸本)9783035713732

Recent advances in rheocasting have resulted in significant expansion in the types of products currently in full commercial production. The current paper gives an overview of components in production in Europe and in China produced using the RheoMetal™ process, that has taken the lead in a strong drive towards new heavy-duty applications made from aluminium alloys. In China, the dominating applications are found in the telecom industry. The trend in Europe is more towards marine and automotive applications commonly in fatigue loaded applications. The reason for the choice of rheocasting for complicated shape thin-walled electronics components with requirements is dominated by process yield and by the ability to improve thermal conductivity. The heavy-duty truck chassis thick walled components target weight reduction through design and to sustain fatigue load normally requiring forged components. Common in all applications are seen in production yield, reduced tool wear and reduction of die soldering. © 2019 Trans tech Publications, Switzerland.

关键词： Marine applications

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Adsorption behavior of Congo red dye from aqueous solutions onto exfoliated graphite as an adsorbent: Kinetic and isotherm studies 9

Adsorption behavior of Congo red dye from aqueous solutions ...

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9th International Conference of Materials Processing and Characterization, ICMPC 2019

作者： Van Pham, Thinh Van Tran, Thuan Nguyen, Trinh Duy Tham, Nguyen Thi Hong Quang, Phan Thanh Tri Uyen, Dao Thi To Le, Nhan Thi Hong Vo, Dai-Viet N. Thanh, Nguyen Trung Bach, Long Giang NTT Hi-Tech Institute Nguyen Tat Thanh University Ho Chi Minh City Viet Nam Graduate University of Science and Technology Vietnam Academy of Science and Technology Ha Noi City Viet Nam Center of Excellence for Green Energy and Environmental Nanomaterials Nguyen Tat Thanh University Ho Chi Minh City Viet Nam Department of Chemical Engineering Pukyong National University Busan Korea Republic of Ho Chi Minh City University of Technology Vietnam National University-Ho Chi Minh City Ho Chi Minh City703500 Viet Nam Faculty of Chemical and Natural Resources Engineering Universiti Malaysia Pahang Malaysia Deparment of Environmental Engineering An Giang University Long Xuyen City An Giang Province Viet Nam Center of Excellence for Functional Polymers and NanoEngineering Nguyen Tat Thanh University Ho Chi Minh City Viet Nam

Herein, we reported a facile method to fabricate the exfoliated graphite (EG) by Hummer's method via a two-step procedure including intercalation with a mixture of oxidants (H2O2 and H2SO4), and exfoliation using a microwave system. For the adsorption experiments, effect of contact time (0-210 min), initial concentration (20-60 mg/L), pH (4-10), and EG dosage (0.3- 0.7 g/L) were systematically studied. Moreover, the adsorption kinetics (pseudo-first-order, pseudo-second-order, Elovich, and Bangham) and isotherms (Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich) were carried out to elucidate the mechanism of CR adsorption over EG. Due to high porosity (40.95 m2/g) and large maximum adsorption capacity of CR (80.775 mg/g), the EG derived from natural graphite can be an effective adsorbent for CR dye treatment in aqueous solution. © 2019 Published by Elsevier Ltd.

关键词： Adsorption

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Development of Response Surface Methodology for Optimization of Congo Red Adsorption Utilizing Exfoliated Graphite As An Efficient Adsorbent 2

Development of Response Surface Methodology for Optimization...

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2nd International Conference on Materials Manufacturing and Modelling, ICMMM 2019

作者： Van Pham, Thinh Van Tran, Thuan Duy Nguyen, Trinh Thi Hong Tham, Nguyen Thanh Tri Quang, Phan Thi To Uyen, Dao Thi Hong Le, Nhan Vo, Dai-Viet N. Trung Thanh, Nguyen Giang Bach, Long NTT Hi-Tech Institute Nguyen Tat Thanh University Ho Chi Minh City Viet Nam Graduate University of Science and Technology Academy of Science and Technology Ha Noi City Viet Nam Center of Excellence for Green Energy and Environmental Nanomaterials Nguyen Tat Thanh University Ho Chi Minh City Viet Nam Department of Chemical Engineering Pukyong National University Busan Korea Republic of Ho Chi Minh City University of Technology Vietnam National University-Ho Chi Minh City Ho Chi Minh City703500 Viet Nam Faculty of Chemical and Natural Resources Engineering Universiti Malaysia Pahang Malaysia Deparment of Environmental Engineering An Giang University An Giang Province Long Xuyen City Viet Nam Center of Excellence for Functional Polymers and NanoEngineering Nguyen Tat Thanh University Ho Chi Minh City Viet Nam

In the present study, we developed an optimization model of CR adsorption onto EG using response surface methodology (RSM) as a statistical tool. The EG was structurally characterized using several techniques such as scanning electron microscope (SEM), estimation of N2 adsorption/desorption isotherm and plotting of pore size. The EG was used as adsorbent to remove the CR from water. Three variables involving concentration (20-50 mg/L), pH (4-10), adsorption time (0-210 min) were investigated. To find out the optimal condition, we adopted Design Expert software-based RSM for the experimental design, 3D surface plotting, and optimization. The optimal results were found at concentration of 48.3 mg/L, and contact time of 188 min for the highest CR adsorption capacity at 53.423 mg/g. With high compatibility via confirmation test, it is suggested that the RSM can be the suitable method to optimize the adsorption of CR onto EG © 2019 Elsevier Ltd.

关键词： Adsorption

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Joint Determination of Reactor Antineutrino Spectra from 235U and 239Pu Fission by Daya Bay and PROSPECT

arXiv

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arXiv 2021年

作者： An, F.P. Andriamirado, M. Balantekin, A.B. Band, H.R. Bass, C.D. Bergeron, D.E. Berish, D. Bishai, M. Blyth, S. Bowden, N.S. Bryan, C.D. Cao, G.F. Cao, J. Chang, J.F. Chang, Y. Chen, H.S. Chen, S.M. Chen, Y. Chen, Y.X. Cheng, J. Cheng, Z.K. Cherwinka, J.J. Chu, M.C. Classen, T. Conant, A.J. Cummings, J.P. Dalager, O. Deichert, G. Delgado, A. Deng, F.S. Ding, Y.Y. Diwan, M.V. Dohnal, T. Dolinski, M.J. Dolzhikov, D. Dove, J. Dvořák, M. Dwyer, D.A. Erickson, A. Foust, B.T. Gaison, J.K. Galindo-Uribarri, A. Gallo, J.P. Gilbert, C.E. Gonchar, M. Gong, G.H. Gong, H. Grassi, M. Gu, W.Q. Guo, J.Y. Guo, L. Guo, X.H. Guo, Y.H. Guo, Z. Hackenburg, R.W. Hans, S. Hansell, A.B. He, M. Heeger, K.M. Heffron, B. Heng, Y.K. Hor, Y.K. Hsiung, Y.B. Hu, B.Z. Hu, Jianrun R. Hu, T. Hu, Z.J. Huang, H.X. Huang, J.H. Huang, X.T. Huang, Y.B. Huber, P. Koblanski, J. Jaffe, D.E. Jayakumar, S. Jen, K.L. Ji, X.L. Ji, X.P. Johnson, R.A. Jones, D.C. Kang, L. Kettell, S.H. Kohn, S. Kramer, M. Kyzylova, O. Lane, C.E. Langford, T.J. LaRosa, J. Lee, J.H.C. Lei, R.T. Leitner, R. Leung, J.K.C. Li, F. Li, H.L. Li, J.J. Li, Q.J. Li, R.H. Li, S. Li, S.C. Li, W.D. Li, X.N. Li, X.Q. Li, Y.F. Li, Z.B. Liang, H. Lin, C.J. Lin, G.L. Lin, S. Ling, J.J. Link, J.M. Littenberg, L. Littlejohn, B.R. Liu, J.C. Liu, J.L. Liu, J.X. Lu, C. Lu, H.Q. Lu, X. Luk, K.B. Ma, B.Z. Ma, X.B. Ma, X.Y. Ma, Y.Q. Mandujano, R.C. Maricic, J. Marshall, C. McDonald, K.T. McKeown, R.D. Mendenhall, M.P. Meng, Y. Meyer, A.M. Milincic, R. Mueller, P.E. Mumm, H.P. Napolitano, J. Naumov, D. Naumova, E. Neilson, R. Nguyen, T.M.T. Nikkel, J.A. Nour, S. Ochoa-Ricoux, J.P. Olshevskiy, A. Palomino, J.L. Pan, H.-R. Park, J. Patton, S. Peng, J.C. Pun, C.S.J. Pushin, D.A. Qi, F.Z. Qi, M. Qian, X. Raper, N. Ren, J. Morales Reveco, C. Rosero, R. Roskovec, B. Ruan, X.C. Searles, M. Steiner, H. Sun, J.L. Surukuchi, P.T. Tmej, T. Treskov, K. Institute of Modern Physics East China University of Science and Technology Shanghai China Department of Physics Illinois Institute of Technology ChicagoIL United States Department of Physics University of Wisconsin Madison MadisonWI United States Wright Laboratory Department of Physics Yale University New HavenCT United States Department of Physics Le Moyne College SyracuseNY United States National Institute of Standards and Technology GaithersburgMD United States Department of Physics Temple University PhiladelphiaPA United States Brookhaven National Laboratory UptonNY United States Department of Physics National Taiwan University Taipei Taiwan Nuclear and Chemical Sciences Division Lawrence Livermore National Laboratory LivermoreCA United States High Flux Isotope Reactor Oak Ridge National Laboratory Oak RidgeTN United States Institute of High Energy Physics Beijing China National United University Miao-Li Liechtenstein Department of Engineering Physics Tsinghua University Beijing China Shenzhen University Shenzhen China University Guangzhou China North China Electric Power University Beijing China Chinese University of Hong Kong Hong Kong Siena College LoudonvilleNY12211 United States Department of Physics and Astronomy University of California IrvineCA92697 United States Physics Division Oak Ridge National Laboratory Oak RidgeTN United States Department of Physics and Astronomy University of Tennessee KnoxvilleTN United States University of Science and Technology of China Hefei China Charles University Faculty of Mathematics and Physics Prague Czech Republic Department of Physics Drexel University PhiladelphiaPA United States Joint Institute for Nuclear Research Moscow Region Dubna Russia Department of Physics University of Illinois at Urbana-Champaign UrbanaIL61801 United States Lawrence Berkeley National Laboratory BerkeleyCA94720 United States George W. Woodruff School of Mechanical Engineering Georgia Institute

A joint determination of the reactor antineutrino spectra resulting from the fission of 235U and 239Pu has been carried out by the Daya Bay and PROSPECT collaborations. This Letter reports the level of consistency of 235U spectrum measurements from the two experiments and presents new results from a joint analysis of both data sets. The measurements are found to be consistent. The combined analysis reduces the degeneracy between the dominant 235U and 239Pu isotopes and improves the uncertainty of the 235U spectral shape to about 3%. The 235U and 239Pu antineutrino energy spectra are unfolded from the jointly deconvolved reactor spectra using the Wiener-SVD unfolding method, providing a data-based reference for other reactor antineutrino experiments and other applications. This is the first measurement of the 235U and 239Pu spectra based on the combination of experiments at low- and highly enriched uranium reactors. © 2021, CC BY.

关键词： Uncertainty analysis

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The utilisation of DFMA and FEA method towards sustainable design improvement: A case study of air freshener

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AIP Conference Proceedings 2021年第1期2339卷

作者： M. S. M. Effendi Z. Shayfull H. Radhwan Noor Hasmiza Harun Shafeeq Ahmad Shamim Ahmad Khairunnisa Norli Ndrieniza Saini Nur ‘Afifah Mazlan Nuruljannah Omar 1School of Manufacturing Engineering Universiti Malaysia Perlis Kampus Tetap Pauh Putra 02600 Arau Perlis Malaysia 2Green Design and Manufacture Research Group Center of Excellence Geopolymer and Green Technology (CEGeoGTech) Universiti Malaysia Perlis 01000 Kangar Perlis Malaysia 3Universiti Kuala Lumpur- British Malaysian Institute Batu 8 Jalan Sg Pusu 53100 Gombak Selangor Malaysia 4Jache Sdn. Bhd. Lot 16 Admin Center Jalan Hi-Tech 2/7 Kulim Hi-Tech Park 09000 Kulim Kedah Malaysia

This paper is about evaluating the components of an automatic air freshener in minimising some part of the quantity required and to design the improvement of an automatic air freshener by emphasising and adapting sustainable design consideration. For this project, Life Cycle Analysis (LCA) and Design for Manufacturing Assembly (DFMA) were applied and used on the automatic air freshener to achieve the best result. Hence, the final results stated that there was 30% components reduction was achieve using DFMA approach, and consequently, the weight was reduced to 42%. After applying LCA on the automatic air freshener, the environmental impacts were also achieving the requirement by reducing 64% of the average effect for the whole product. Both of these tools need to be applied to prove the effectiveness so that the cost of manufacturing in producing an automatic air freshener will be reducing and at the same time the environmental aspects of product design should be strengthened especially during the phase of conceptual design.

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Sustainable product design analysis: A case study of car phone holder

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AIP Conference Proceedings 2021年第1期2339卷

作者： M. S. M. Effendi Z. Shayfull H. Radhwan Johara Ghazali Shafeeq Ahmad Shamim Ahmad Enfira Yap Chai Kok Lye Ling Muhamad Syazwan Jamaluddin Yeip Jia Qi 1School of Manufacturing Engineering Universiti Malaysia Perlis Kampus Tetap Pauh Putra 02600 Arau Perlis Malaysia 2Green Design and Manufacture Research Group Center of Excellence Geopolymer and Green Technology (CEGeoGTech) Universiti Malaysia Perlis 01000 Kangar Perlis Malaysia 3Universiti Kuala Lumpur British Malaysian Institute Km 8 Jalan Sungai Pusu 53100 Gombak Selangor Malaysia 4Jache Sdn. Bhd. Lot 16 Admin Center Jalan Hi-Tech 2/7 Kulim Hi-Tech Park 09000 Kulim Kedah Malaysia

This paper investigates and analysing the reduction of the total number of car phone holder components and its possibilities towards the design sustainability. The analysis setup is used Design for Manufacturing Assembly (DFMA), Finite Element Analysis (FEA) and Life Cycle Analysis (LCA) for the purposes mentioned above. It was found that the total number of components was reduced by 67.9% using DFMA. Sustainability analysis proves that the redesign of the car phone holder was able to reduce the environmental impact throughout the overall design. The FEA analysis also revealed that the redesigned product could be support by the different weight of the phone load. This approach is essential to the designer and design engineer to identify product sustainability at the initial phase of the design process, especially during conceptual design for a better product.

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Environmental and assembly analysis using LCA, DFMA and FEA on cordless screwdriver

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AIP Conference Proceedings 2021年第1期2339卷

作者： M. S. M. Effendi Z. Shayfull H. Radhwan Noor Hasmiza Harun Shafeeq Ahmad Shamim Ahmad Afiq Hafizuddin Hashim Abdul Syukur Abdul Rahman Kamarul Radhi Md Zohid Vinaasha Balakrishnan 1School of Manufacturing Engineering Universiti Malaysia Perlis Kampus Tetap Pauh Putra 02600 Arau Perlis Malaysia 2Green Design and Manufacture Research Group Center of Excellence Geopolymer and Green Technology (CEGeoGTech) Universiti Malaysia Perlis 01000 Kangar Perlis Malaysia 3Universiti Kuala Lumpur-British Malaysian Institute Batu 8 Jalan Sg Pusu 53100 Gombak Selangor Malaysia 4Jache Sdn. Bhd. Lot 16 Admin Center Jalan Hi-Tech 2/7 Kulim Hi-Tech Park 09000 Kulim Kedah Malaysia

A cordless screwdriver is a type of power tools available in the market, purposely used for fastening and drilling task powered by a rechargeable battery. In the design process, the designer is required to identify the possible changes of some issues found on the cordless screwdriver development emphasising cost, number of parts, materials, manufacturing process and the life cycle of this product. Thus, this research work towards focusing on the analysis of Cordless Screwdriver to minimise the components and to improve the design sustainably. Design for Manufacturing Assembly (DFMA) and Life Cycle Analysis (LCA) was utilised in this study. Analysis has shown how the number of components has been reduced to 15 per cent after the DFMA application. While the LCA has demonstrated a reduction of weight to 12%, air acidification is 8% and total energy 13%, carbon footprint 6% and water eutrophication is 6%. This new approach is important to demonstrate the efficiency of both to reduce the costs of producing a Cordless Screwdriver.

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Sustainability assessment of torchlight design: Identification of new design structure and material selection

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AIP Conference Proceedings 2021年第1期2339卷

作者： M. S. M. Effendi Z. Shayfull H. Radhwan Zuhanis Mansor Shafeeq Ahmad Shamim Ahmad Ting Hua Jui Nur Ainin Faissal Nurafzarini Mohd Rusdi Nor Syahirah Mat Piah 1School of Manufacturing Engineering Universiti Malaysia Perlis Kampus Tetap Pauh Putra 02600 Arau Perlis Malaysia 2Green Design and Manufacture Research Group Center of Excellence Geopolymer and Green Technology (CEGeoGTech) Universiti Malaysia Perlis 01000 Kangar Perlis Malaysia 3Communication Technology Section Universiti Kuala Lumpur British Malaysian Institute (UniKL BMI) Batu 8 Jalan Sungai Pusu 53100 Selangor Malaysia 4Advanced Telecommunication Technology Research Cluster (AAT) Universiti Kuala Lumpur British Malaysian Institute (UniKL BMI) Batu 8 Jalan Sungai Pusu 53100 Selangor Malaysia 5Jache Sdn. Bhd. Lot 16 Admin Center Jalan Hi-Tech 2/7 Kulim Hi-Tech Park 09000 Kulim Kedah Malaysia

A common torchlight comprises of a lighting source fixed in a reflector and a clear lens, battery, switch and enclosed or protected body case. Based on the original design of this torchlight, customers are having problem to hold the torchlight due to poor grip and causing the torchlight easy to slip off and possibly get damaged when it falls into the water. The objectives of this project intend to improve the torchlight design to secure handling, maintenance, and to increase the durability of the torchlight against water using float material which also enables the user to locate the torchlight in a short time. In conclusion, this study also identifies the possible environmental factors that assessed using sustainability tools to ensure the entire design structure will enhance the sustainability issue. Thus, based on the sustainability assessment, the float material able to apply for this purpose to achieve the objective, and the design concept is according to the customer requirement.

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Analysis of an assembly process and environmental impact for a new design of food grater

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AIP Conference Proceedings 2021年第1期2339卷

作者： M. S. M. Effendi Z. Shayfull H. Radhwan Zuhanis Mansor Shafeeq Ahmad Shamim Ahmad hidayatul Husna Al Rashid Nurin Syuhada Noorazman Muhammad Iqbal Talib Muhammad Adam Al-Modthaqim Muhammad Basri 1School of Manufacturing Engineering Universiti Malaysia Perlis Kampus Tetap Pauh Putra 02600 Arau Perlis Malaysia 2Green Design and Manufacture Research Group Center of Excellence Geopolymer and Green Technology (CEGeoGTech) Universiti Malaysia Perlis 01000 Kangar Perlis Malaysia 3Communication Technology Section Universiti Kuala Lumpur British Malaysian Institute (UniKL BMI) Batu 8 Jalan Sungai Pusu 53100 Selangor Malaysia 4Advanced Telecommunication Technology Research Cluster (AAT) Universiti Kuala Lumpur British Malaysian Institute (UniKL BMI) Batu 8 Jalan Sungai Pusu 53100 Selangor Malaysia 5Jache Sdn. Bhd. Lot 16 Admin Center Jalan Hi-Tech 2/7 Kulim Hi-Tech Park 09000 Kulim Kedah Malaysia

This research analyses and evaluate food grater components in order to reduce the required quantity and to consider the improvement of possible sustainable design based on various material selection, particularly to specific parts. This study will use integration methodology to achieving sustainability which is Design for Manufacturing Assembly (DFMA), and Life Cycle Analysis (LCA). The analysis result will show the reduction of the part numbers from 20 parts to only four parts respectively to the significant alteration for specific components. Furthermore, the Life Cycle Analysis (LCA), the weight is reduced by 12.46 gram after changing the material from PPE to ABS. Also, the carbon footprint effect reduced by 40% while air acidification effect is reduced by 21.9%. Besides the material changes also reduced the total energy consumed by 36.4%. This study found that both methods are capable of reducing production costs assembly time, and consequently can enhance the environmental impact of a product.

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