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Extraction of Jasmine Essential Oil By Hydrodistillation method and Applications On Formulation of Natural Facial Cleansers

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IOP Conference Series: Materials Science and engineering 2019年第1期542卷

作者： Nguyen Dinh Phuc Le Hoang Phuong Thy Tri Duc Lam Vo Hoang Yen Nguyen Thi Ngoc Lan Faculty of Chemical Engineering and Food Technology Nguyen Tat Thanh University Ho Chi Minh City Vietnam NTT Hi-Tech Institute Nguyen Tat Thanh University Ho Chi Minh City Vietnam

Jasmine essential oil has been studied and widely used for many centuries in many countries throughout the world. However, relatively little is explored about jasmine essential oil application. Here, we produced essential oil of jasmine by hydrodistillation method. The effect of distillation time, distillation temperature, feed size, water-raw material ratio to the yield of the distillation process was analyzed and recorded. With 6 hours, 120°C, grind fresh and ratio of 2:1 the yield was 0.092%. Antibacterial compounds of Jasmine essential oil were determined by measuring Gas Chromatography-Mass Spectrometry equipment. Jasmine essential oils are applied to develop the facial cleanser product that is safe for human. Jasmine facial cleanser will be a new product in Viet Nam's cosmetic with many potentials.

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Essential oil from fresh and dried Rosemary cultivated in Lam Dong province, Vietnam

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IOP Conference Series: Materials Science and engineering 2019年第1期544卷

作者： Trieu Tuan Anh Lam Thi Thu Ngan Tri Duc Lam Faculty of Chemical Engineering and Food Technology Nguyen Tat Thanh University Ho Chi Minh City Vietnam NTT Hi-Tech Institute Nguyen Tat Thanh University Ho Chi Minh City Vietnam

Rosemary essential oil has been widely used in folk medicine for treatment of anxiety, memory deficit and cancer thanks to its high antioxidant activity and antibacterial properties. Composition of rosemary essential oil largely depends on the geographical position of the cultivated plant and conditions of the extraction process. In this study, fresh and dried rosemary leaves were used for extraction of essential oil using hydrodistillation method. The extraction performance, composition and antioxidant activity of the essential oil were measured. The oil yield for dried leaves (1.2 ml/g) is significantly lower than that for fresh leaves (3.16 ml/g). However, the difference on chemical profile and antioxidation activity of the two oil samples was indistinguishable. The most remarkable finding was the presence of Levoverbenone at very high concentration in rosemary essential oil, accounting for 10.87% and 12.12% of the oil sample extracted from fresh and dried leaves respectively.

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Effect of extraction process on extraction yeild, total polyphenol content and antioxidant activity of Jasminum Subtriplinerve

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IOP Conference Series: Materials Science and engineering 2019年第1期544卷

作者： Trieu Tuan Anh Luu Tu Hao Tri Duc Lam Faculty of Chemical Engineering and Food Technology Nguyen Tat Thanh University Ho Chi Minh City Vietnam NTT Hi-Tech Institute Nguyen Tat Thanh University Ho Chi Minh City Vietnam

Jasminum Subtriplinerve Blume (Oleaceae) is herbal plants widely a tea for weight loss, stimulates milk glands. Extract product it easy used yet had little research. This study was carried out to evaluate the effect of extracting conditions such as water/material ratio, extraction temperature and extracting time on extracting yield, polyphenol content and antioxidant activity of *** extract. The total phenolic compounds were determined according to the Folin-Ciocalteu method. Extraction yield (0.22g/100 g) was obtained at water/material ratio 15:1 (ml/g), 40°C and 4 hours extraction time. Under these optimized conditions, the polyphenol content of was 2640.4 μg/1g extract. And the extract can harvest 46.11 % of DPPH (30 μg/mL) at 10 000 μg/ml concentration

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Effect of extracting process on saponin content and antioxidant activity of Gleditschia fera (Lour.) Merr dried fruit extract

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IOP Conference Series: Materials Science and engineering 2019年第1期544卷

作者： Trieu Tuan Anh Nguyen Thi Thanh Huyen Tri Duc Lam Faculty of Chemical Engineering and Food Technology Nguyen Tat Thanh University Ho Chi Minh City Vietnam NTT Hi-Tech Institute Nguyen Tat Thanh University Ho Chi Minh City Vietnam

Gleditschia fera (Lour.) Merr (GfL) was a traditional herbal used for treatment of diabetes mellitus and for arresting and/or slowing down hair loss. In this study, powder of GfL dried fruit was immersed in the pure water to extract saponin and other components atdifferent material/solvent ratios, extraction time (hours) and extraction temperature (°C). Saponin content of the final product (extract) was evaluated by Oleanolic acid-H2SO4 assay. The antioxidants activity of the extract was determined by DPPH method. high extraction yield (74g/100 g) was obtained at the material/solvent ratio 1:15 (w/v), 50°C and 4 hours extraction time. Under these optimized conditions, the highest saponin content of was 37.06 mg/g. The extract can harvest 45.30 % of DPPH at 10000 μg/ml concentration

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Impact of water-drop presence on diffusion parameters of PEFC gas diffusion layers

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Energy Procedia 2019年 158卷 1400-1405页

作者： Mayken Espinoza-Andaluz Tingshuai Li Martin Andersson Escuela Superior Politécnica del Litoral ESPOL Facultad de Ingeniería Mecánica y Ciencias de la Producción Centro de Energías Renovables y Alternativas Campus Gustavo Galindo Km. 30.5 Vía Perimetral P.O. Box 09-01-5863 Guayaquil Ecuador School of Materials and Energy University of Electronic Science and Technology of China 2006 Xiyuan Ave West Hi-Tech Zone Chengdu Sichuan China Department of Energy Sciences Faculty of Engineering Lund University P.O. Box 118 Lund Sweden Forschungszentrum Jülich GmbH Institute of Energy and Climate Research IEK-3 Electrochemical Process Engineering Jülich Germany

A polymer electrolyte fuel cell (PEFC) produces electrical energy thanks to the electrochemical reaction carried out inside the cell. During the energy conversion, water molecules are also produced in the cathode side and this can affect the diffusion parameters of the gas diffusion layers (GDLs). The generated water-drops due to the reaction may block the reactant gases and produce material oxidation. The mentioned phenomena influence the performance of the PEFCs. This paper aims to describe and quantify the impact on diffusion parameters of GDLs when the presence of formed water-drops inside the layer is considered. This study considers digitally generated GDLs, and the parameters considered are porosity, gas-phase tortuosity and diffusibility. The fluid flow behavior through the three-dimensional porous domain representing the GDL is obtained by using the lattice Boltzmann method (LBM). Depending on the water-drop size, the impact over the mentioned parameters can be computed. For the current study, a single water-drop has been placed into the GDL domain and its impact has been analyzed.

关键词： Gas diffusion layer PEFC Gas-phase tortuosity Diffusibility Water-drops

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Extraction of Essential oils and volatile compounds of Kaffir lime (Citrus hystrix D.C) by hydrodistillation method

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IOP Conference Series: Materials Science and engineering 2020年第1期991卷

作者： X T Le P T H Ha H X Phong T T hien T T K Ngan Department of Chemical Engineering HCMC University of Technology VNU-HCM Ho Chi Minh City Vietnam Department of Biotechnology Nguyen Tat Thanh University Ho Chi Minh City Vietnam Biotechnology Research and Development Institute Can Tho University Can Tho City Vietnam 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

Kaffir lime (Citrus hystrix D.C.), a member of the Citrus family, is a lemon tree naturally grown in tropical regions of Asia. Kaffir lime contains a specific aroma currently used worldwide as spices and cosmetics. Kaffir lime leaves are a famous spice for many dishes of Thai cuisine. The peel of Kaffir lime collected in the southwest of Vietnam was used for essential oil extraction using the process of hydro-distillation. During extraction, 100 g Kaffir lime peel was input at 1:3 ratio, at 120 °C for 90 min. The phytochemical profile of Kaffir Lime essential oil was analyzed by using gas chromatography/mass spectrometry (GC/MS) assay. The optimal essential oil yield reached 4.6%. A total of twenty-six components have been identified to account for 99.998% of essential oils. B-pinene (47.926%) was characterized as the main ingredient of peel oil. Other major components of Kaffir lime essential oil included D-limonene (24.121%), citronelal (11.84%), and α-pinene (2.834%). The present study evaluated the chemical compositions of Kaffir lime essential oil and compared with other previous studies. Future research on Kaffir lime EO can be expanded by using different extraction methods to improve its bioactive and applicability in many regions.

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Phytochemical Content and Antioxidant activity in aqueous and ethanolic extracts of Eryngium foetidum L.

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IOP Conference Series: Materials Science and engineering 2020年第1期991卷

作者： N Q N Thi T N T An O B Nguyen L T Dung L V Minh L T H Nhan NTT Hi-Tech Institute Nguyen Tat Thanh University Ho Chi Minh City Vietnam Center of Excellence for Biochemistry and Natural Products Nguyen Tat Thanh University Ho Chi Minh City Vietnam Faculty of Biotechnology Nguyen Tat Thanh University Ho Chi Minh City Vietnam Institute of Applied Materials Science Vietnam Academy of Science and Technology Ho Chi Minh City Vietnam Research Center of Ginseng and Medicinal Materials National Institute of Medicinal Materials Ho Chi Minh City Department of Chemical Engineering HCMC University of Technology VNU-HCM Ho Chi Minh City Vietnam

Eryngium foetidum L. has been used as a spice for food and treatment for diabetes, rheumatism, anti-inflammatories, respiratory and stomach disorders. In Vietnam, due to high consumption of Eryngium foetidum L. in popular dishes and its significant benefits, the preliminary screening of the plant phytochemicals is required to extend its application and improve efficacy. The present research aimed at Eryngium foetidum L. extraction using aqueous and ethanolic as solvents to explore their phytochemical composition, total contents of flavonoids and phenolics and antioxidant activity. Phytochemical screening has detected the presence of flavonoids, tannins, alkaloids and terpenoids in both plant extracts. In addition, the total content of phenolics in both extract was equally significant while the total content of flavonoids was higher in ethanolic extract, as compared to the aquaeous extract. The antioxidant actions of aquaeous and ethanolic extracts were estimated using DPPH and ABTS scavenging assays. Results have shown that the former exhibited stronger DPPH scavenging activity than the latter. Findings from the present study suggested that ethanol and water can be useful for Eryngium foetidum L. extraction with high content of phytochemicals, phenolics and antioxidant activity.

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Comparative study on removal of Monodyes by using Ni-Al layered double hydroxides

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IOP Conference Series: Materials Science and engineering 2020年第2期736卷

作者： T T U Dao T H T Nguyen T T Q Phan T S Do D V N Vo N A Tien Center of Excellence for Green Energy and Environmental Nanomaterials Nguyen Tat Thanh University Ho Chi Minh City Vietnam NTT Hi-Tech Institute Nguyen Tat Thanh University Ho Chi Minh City Vietnam Faculty of Chemical Engineering and Food Technology Nguyen Tat Thanh University Ho Chi Minh Vietnam Institute of Chemistry Vietnam Academy of Science and Technology Hanoi Vietnam Faculty of Chemical and Natural Resources Engineering Universiti Malaysia Pahang Malaysia Ho Chi Minh City University of Education Ho Chi Minh City Vietnam Center of Excellence for Functional Polymers and NanoEngineering Nguyen Tat Thanh University Ho Chi Minh City Vietnam

The toxic and carcinogenic effluents discharged from the textile and garment industry represent a major concern to the environment and public health. Treatment technologies for these effluents to reduce toxicity and dye concentration are therefore crucial. The objective of this study was to focus on eliminating four monoazo dyes including Congo (CR), Methyl orange (MO), Methylene blue (MB) and Crystal violet (CV) using adsorbents, Ni/Al LDHs. The results proved that Ni/Al LDHs exhibit excellent adsorption capacity on anionic dyes (CR, MO) instead of cationic dyes (CV, MB). The maximum adsorption capacity of Methyl Orange on Ni/Al LDHs was found to be 93.517 mg/g and Congo red at 87.975 mg/g. In addition, the study of leaching test of adsorbents show stable synthetic materials in aqueous media. The analyses mentioned above indicates that Ni/Al LDHs may be a promising adsorbent to remove anion dyes from aqueous media.

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Strong Carbon Features and a Red Early Color in the Underluminous Type Ia SN 2022xkq

arXiv

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arXiv 2023年

作者： Pearson, Jeniveve Sand, David J. Lundqvist, Peter Galbany, Lluís Andrews, Jennifer E. Bostroem, K. Azalee Dong, Yize Hoang, Emily Hosseinzadeh, Griffin Janzen, Daryl Jencson, Jacob E. Lundquist, Michael J. Mehta, Darshana Retamal, Nicolás Meza Shrestha, Manisha Valenti, Stefano Wyatt, Samuel Anderson, Joseph P. Ashall, Chris Auchettl, Katie Baron, Eddie Blondin, Stéphane Burns, Christopher R. Cai, Yongzhi Chen, Ting-Wan Chomiuk, Laura Coulter, David A. Cross, Dane Davis, Kyle W. de Jaeger, Thomas DerKacy, James M. Desai, Dhvanil D. Dimitriadis, Georgios Do, Aaron Farah, Joseph R. Foley, Ryan J. Gromadzki, Mariusz Gutiérrez, Claudia P. Haislip, Joshua González Hernández, Jonay I. hinkle, Jason T. Hoogendam, Willem B. Howell, D. Andrew Hoeflich, Peter Hsiao, Eric Huber, Mark E. Jha, Saurabh W. Palau, Cristina Jiménez Kilpatrick, Charles D. Kouprianov, Vladimir Kumar, Sahana Kwok, Lindsey A. Larison, Conor LeBaron, Natalie Le Saux, Xavier Lu, Jing McCully, Curtis Evans, Tycho Mera Milne, Peter Modjaz, Maryam Morrell, Nidia Müller-Bravo, Tomás E. Newsome, Megan Nicholl, Matt Gonzalez, Estefania Padilla Payne, Anna V. Pellegrino, Craig Phan, Kim Pineda-García, Jonathan Piro, Anthony L. Piscarreta, Lara Polin, Abigail Reichart, Daniel E. Rojas-Bravo, César Ryder, Stuart D. Salmaso, Irene Schwab, Michaela Shahbandeh, Melissa Shappee, Benjamin J. Siebert, Matthew R. Smith, Nathan Strader, Jay Taggart, Kirsty Terreran, Giacomo Tinyanont, Samaporn Tucker, M.A. Valerin, Giorgio Young, D.R. Steward Observatory University of Arizona 933 North Cherry Avenue TucsonAZ85721-0065 United States Oskar Klein Centre Department of Astronomy Stockholm University Albanova University Centre StockholmSE-106 91 Sweden Campus UAB Carrer de Can Magrans s/n BarcelonaE-08193 Spain Institut d’Estudis Espacials de Catalunya Gran Capità 2-4 Edifici Nexus Desp. 201 BarcelonaE-08034 Spain Gemini Observatory 670 North A‘ohoku Place HiloHI96720-2700 United States Department of Physics and Astronomy University of California Davis 1 Shields Avenue DavisCA95616-5270 United States Department of Physics & Engineering Physics University of Saskatchewan 116 Science Place SaskatoonSKS7N 5E2 Canada Department of Physics and Astronomy The Johns Hopkins University 3400 North Charles Street BaltimoreMD21218 United States W. M. Keck Observatory 65-1120 Māmalahoa Highway KamuelaHI96743-8431 United States Department of Astronomy University of Washington 3910 15th Avenue NE SeattleWA98195-0002 United States European Southern Observatory Alonso de Córdova 3107 Casilla 19 Santiago Chile Millennium Institute of Astrophysics MAS Nuncio Monsenor Sotero Sanz 100 Off. 104 Providencia Santiago Chile Department of Physics Virginia Tech 850 West Campus Drive BlacksburgVA24061 United States School of Physics The University of Melbourne ParkvilleVIC3010 Australia Department of Astronomy and Astrophysics University of California Santa CruzCA95064-1077 United States Planetary Science Institute 1700 East Fort Lowell Road Suite 106 TucsonAZ85719-2395 United States Hamburger Sternwarte Gojenbergsweg 112 Hamburg21029 Germany Homer L. Dodge Department of Physics and Astronomy University of Oklahoma 440 W. Brooks NormanOK73019-2061 United States Aix-Marseille Univ CNRS CNES LAM Marseille13388 France Observatories of the Carnegie Institute for Science 813 Santa Barbara Street PasadenaCA91101-1232 United States Yunnan Observatories Chinese Academy of

We present optical, infrared, ultraviolet, and radio observations of SN 2022xkq, an underluminous fast-declining type Ia supernova (SN Ia) in NGC 1784 (D ≈ 31 Mpc), from Copyright © 2023, The Authors. All rights... 详细信息

关键词： Explosions

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Multifunctional AuI‐based AIEgens: Manipulating Molecular Structures and Boosting Specific Cancer Cell Imaging and Theranostics

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Angewandte Chemie 2020年第18期132卷

作者： Jing Zhang Hang Zou Jinping Lei Benzhao He Xuewen He Herman H. Y. Sung Ryan T. K. Kwok Jacky W. Y. Lam Lei Zheng Ben Zhong Tang Department of Chemistry Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction Institute for Advanced Study Department of Chemical and Biological Engineering The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong China Department of Laboratory Medicine Nanfang Hospital Southern Medical University Guangzhou 510515 China School of Pharmaceutical Sciences Sun Yat-Sen University Guangzhou 510006 China HKUST-Shenzhen Research Institute No. 9 Yuexing 1st RD South Area Hi-tech Park Nanshan Shenzhen 518057 China Center for Aggregation-Induced Emission SCUT-HKUST Joint Research Institute State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou 510640 China

Gold(I) N‐heterocyclic carbene (Au I ‐NHC) complexes have emerged as potential anticancer agents owing to their high cytotoxicity and stability. Integration of their above unique functions with customized aggregation‐induced emission (AIE) luminogens to achieve specific bioimaging and efficient theranostics to cancer is highly desirable but is rarely studied. Now, a series of novel Au I ‐NHC compounds were developed with AIE characteristics. A complex with a PPh 3 ligand was selected out as it could achieve both prominent specific imaging of various cancer cells and efficient inhibition of their growth with negligible toxic effects on normal cells due to the targeting binding and strong inhibition towards thioredoxin reductase. This complex could also act as a powerful radiosensitizer to boost the anticancer efficacy with performance superior to that of popularly used auranofin. It holds great potential as a specific and effective theranostic drug in cancer diagnosis and precise therapy.

关键词： Aggregationsinduzierte Emission Gold(I)-Komplexe Radiosensibilisatoren Spezifische Biobildgebung Thioredoxin-Reduktase

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