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Effect of storage condition on color, vitamin C content, polyphenol content and antioxidant activity in fresh soursop pulp (Annona muricata L.)

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

作者： N Y T Tran N P T Nhan V T Thanh N D Chinh D L Tri D V Nguyen T A Vy T T Truc P V Thinh 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 City Vietnam Department of Chemical and Biochemical Engineering Gachon University South Korea College of Agriculture and Applied Biology Can Tho University Vietnam

Annona muricata Linn. (soursop) belongs to the Annonaceae family. This plant has been traditionally used for the treatment of various infectious and inflammatory diseases. In this study, the effect of storage conditions (room and cold condition) on Annona muricata nutrients was evaluated on the basis of color, vitamin C, polyphenol content and antioxidant activity (DPPH). The change in Lab* brightness (64.34 ± 4.18a, -4.61 ± 0.31a, 12.80 ± 0.57a for fresh sample) was negligible during the 10 day cooling process (66.22 ± 2.33ab, -0.58 ± 7.89a, 9.03 ± 0.85b). These criteria have not changed compared to the original sample after 2 days. The effect of room temperature on properties of Soursop was significant. After 8 and 10 days, it was impossible to quantify TAA, TPC and ABTS of the sample. The values of the two samples (8 and 10 days) at low temperatures were respectively 4.46 ± 0.35 and 3.27 ± 0.33 (TAA); 3.00 ± 0.05 and 2.64 ± 0.30 (TPC); 0.66 ± 0.01 and 0.69 ± 0.04 (free-radicals scavenging capacity). The appearance and morphology of the samples are also graphically described.

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Effects of drying conditions on total phenolic content and other parameters of soursop jelly (Annona muricata L.)

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

作者： N Y T Tran N P T Nhan V T Thanh D V Nguyen P V Thinh T A Vy T D Lam T T Truc NTT Hi-Tech Institute Nguyen Tat Thanh University Ho Chi Minh City Vietnam Faculty of Chemincal Engineering and Food Technology Nguyen Tat Thanh University Ho Chi Minh City Vietnam Department of Chemical and Biochemical Engineering Gachon University South Korea College of Agriculture and Applied Biology Can Tho University Vietnam

Annona muricata Linn. (soursop) belongs to the family Annonaceae. This plant had been traditionally used for treatment of various infectious and inflammatory diseases. This study aimed to determine the effects of convection drying on the nutrient composition of the plant. Measured indicators included protein content, ash content, fat, total ascorbic acid content (TAA), total phenolic content (TPC), color and sensory level of soursop. At different temperatures of 40°C, 50° and 60°C, the evaluation criteria change significantly when supplemented with °Brix at 10%, 15% and 20%. highest protein content achieved at 20% soluble solids concentration was 2.71 ± 0.09 and 2.68 ± 0.01 at 40 and 60°C, respectively. Most of the percentage of ash of the sample was unaffected and the change of the fat content is negligible. Moreover, TAA and TPC were found to decline after the process. About 68.62% TAA was retained when drying at 40°C (20% Brix) and the figure for TPC was 38.46% (60°C, 10% Brix). Typically, in the L* color space, all samples exhibited the value of higher than than 55 and there is a tendency to give a white color. In addition, the a* and b* values increased after drying. Optimal parameters are selected based on the commercial nature of the product and the retention of nutritional value. Final results consisted of the addition of 10% syrup sugar (60 ° Brix) in the sample under the temperature of 40 ° C for 390 minutes.

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Research on Construction Control of Semi Hybrid Steel-concrete Comoposite Cable-stayed Bridge

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IOP Conference Series: Earth and Environmental Science 2020年第5期510卷

作者： Tiedong Qi Qin Yuan Lei Ma Dianyuan Liu Xiaolei Wang Research Institute of Highway Ministry of Transport Beijing 100088 China China-Road Transportation Verification & Inspection Hi-Tech Co. Ltd. Beijing 100088 China China Railway Major Bridge Reconnaissance & Design Institute Co. Ltd. Wuhan 430050 China School of Transportation Science and Engineering Harbin Institute of Technology Harbin 150090 China

Hong-shui river especially big bridge is a kind of semi hybrid steel-concrete comoposite cable-stayed bridge. The erection of Guizhou side span adopt the incremental launching construction method, which was composite beam; The erection of midspan adopt cable-stayed buckled method, which was composite beam; The erection of Guangxi side span adopt support frame casting in situ construction method, which was concrete π type girder. The paper focus on the characteristics of the asymmetrical structure forma and asymmetric construction method of Hong-shui river especially big bridge, discussing the key contents of construction monitoring, which can offer reference and consulting for related engineering.

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Corrigendum to “Fast and Effective Route for Removing Methylene Blue from Aqueous Solution by Using Red Mud-Activated Graphite Composites”

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Journal of Chemistry 2022年第1期2022卷

作者： Xuan Linh Ha Thi Thu Ngo Quoc Toan Tran Tra Huong Do Bui Thanh Giang Huynh Ky Phuong Ha Hong-Tham T. Nguyen N.T.K. Chung Tri Khoa Nguyen Nguyen Thanh Hai International School Thai Nguyen University Thai Nguyen Vietnamtnu.edu.vn Department of Chemistry Thai Nguyen University of Education Thai Nguyen Vietnamdhsptn.edu.vn Faculty of Chemical Engineering Ho Chi Minh City University of Technology Ho Chi Minh City Vietnamhcmut.edu.vn NTT Hi-Tech Institute Nguyen Tat Thanh University 300A Nguyen Tat Thanh District 4 Ho Chi Minh City 755414 Vietnamntt.edu.vn Department of Physics Thu Dau Mot University 6 Tran Van on Street Thu Dau Mot 820000 Binh Duong Vietnamtdmu.edu.vn Research and Development Center for Advanced Technology Hanoi Vietnam Nanotechnology Program VNU Vietnam-Japan University Hanoi Vietnam

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Development of an aromatic wax product containing natural Lemongrass (Cymbopogon Citratus) essential oil

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

作者： T K N Tran T H Tran T H N Le T L Xuan N Q A Phan T I Cam G B Long 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 Department of Chemical Engineering HCMC University of Technology VNU-HCM Ho Chi Minh City Vietnam Institute of Natural Products Chemistry Vietnam Academy of Science and Technology Ha Noi Vietnam

Lemongrass oil contains many useful aromatic compounds, some of which have strong deodorizing and antibacterial properties (citral and geraniol). The ingredient with the highest content in citronella oil is Citral (accounting for more than 80% of citronella oil content), which plays a key role in functionalities of disinfectants, biocides, odorants and insecticides. This study aims to incorporate lemongrass essential oil into a wax product to extend the application of the oil. The effect of factors that affects the process of creating aromatic wax was investigated. The yield of essential oils obtained by steam distillation was 0.29%. The effect of factors that affects the process of creating aromatic wax was investigated. The formula of aromatic wax contains 4.5% Stearic acid, 2.7% NaOH, 88.6% Alcohol 20°, 2.4% PEG-40, 2% Lemongrass Essential oil. The results indicate that the lemongrass essential oil causes no significant detriment to the beneficial properties of the obtained aromatic wax.

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Study on septic sludge utilization to coordinate with agricultural wastes to produce compost fertilizer

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

作者： T Tran L T A Hong N T T Kieu D A Le L Q Tuong L V Tan NTT Hi-Tech Institute Nguyen Tat Thanh University Ho Chi Minh City 70000 Vietnam Falcuty of Food and Environmental Engineering Nguyen Tat Thanh University Ho Chi Minh City 70000 Vietnam. Department of Science and Technology of Ben Tre Province 86000 Vietnam Institute of Tropical Biology Vietnam Academy of Science and Technology Ho Chi Minh City 70000 Vietnam.

IVietnam, little attention is being paid to the management and treatment of septic tank sludge to take advantage of the number of nutrients in this available resource. This paper presents the potentials and performance of the compost production on the mixing of septic tank sludge and agricultural residues as coffee husk, coconut husk, peat. It added supplementary by 5% bioproducts of Trichoderma sp and 30 ml of molasses in 45days. The results showed the highest quality compost, being mixes of septic tank sludge and coffee husks with total N = 4.01%, total P = 0.41%, total K2O = 3.68% and accepting for the Vietnam standards of fertilizer regulations, resulted also illustrated that *** concentration in septic tank sludge sample decreased 2.5 - 3.3 times compared to the previous sample. The second one, the composting efficiency was surveyed on the growth of green mustard plant during 31 days by basal fertilizing and top dressing of this compost at 10 days. The growth of the green mustard plant showed the high compost efficiency septic tank sludge and coffee husk based on 28.21cm of height and 62.5g / plant weight. Especially, NT4 combining from septic tank waste, coffee husk with chemical fertilizers was a good formula by getting the best result in all treatment by combined of compost and chemical fertilizer was at the top dressing period, seems the high compost efficiency in helping Brassica juncea grow well by growing green mustard, being 31.25cm of height and 95.83g / plant weight.

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Biodegrading evaluation of azo dye group – Congo Red, Methyl Blue and Methyl Orange using bacteria isolated from textile wastewater sediment

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

作者： T Tran V Hoa N T T Nga D A Le L V Tan L T X Huong L T A Hong NTT Hi-Tech Institute Nguyen Tat Thanh University Ho Chi Minh City 70000 Vietnam Falcuty of Food and Environmental Engineering Nguyen Tat Thanh University Ho Chi Minh City 70000 Vietnam. Department of Science and Technology of Ben Tre Province 86000 Vietnam Institute of Tropical Biology Vietnam Academy of Science and Technology Ho Chi Minh City 70000 Vietnam.

Textile wastewater is one of the most water polluted sources affecting the environment, ecosystems, and causing human malignancy because it contains azo dye pigment group. The treatment requires various types of physical and chemical methods which are time-consuming and hazardous environmental effects. The biodegradable method using microorganisms for textile effluent has been applied due to its environmental friendliness and affordability. Our study aims to identify the microorganisms that are capable of simultaneous degradation of three monochromatic colors belonging to the azo dying group, including Congo Red, Methyl Blue, Methyl Orange via qualitative experiments using Potato Dextrose Agar (PDA) media plus the three monochromatic colors and quantitative experiments using Pt-Co calibration curve to identify the biodegradable efficiency of each and combined bacterial isolated strains. The results showed that six bacterial strains isolated from textile waste sludge were capable of decolorizing the three azo - monochromatic pigments. Moreover, we found that strain Bacillus Subtilis E1 owning Quorum Sensing mode had the highest decoloration efficiency with color removal performance for Methyl Orange, Methyl Blue, and Congo Red was 83.7%, 30.6%, and 94.4%. In particular, the combinations of two Bacillus Subtilis strains yielded a multi-color decolorizing performance with an efficiency of over 80% for each pair.

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Application of Response Surface Methodology in the Process of extracting essential oil from the Calamondin (Citrus microcarpa) Peels

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

作者： T C Q Ngo T P Dao T H Tran T H N Le M Q Pham N H Nguyen Q T Tran 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 City Vietnam Department of Chemical Engineering HCMC University of Technology VNU-HCM Ho Chi Minh City Vietnam Graduate University of Science and Technology Vietnam Academy of Science and Technology Ha Noi Vietnam Institute of Natural Products Chemistry Vietnam Academy of Science and Technology Ha Noi Vietnam Institute of Applied Materials Science Vietnam Academy of Science and Technology 01 TL29 District 12 Ho Chi Minh City Vietnam

Calamondin (Citrus microcarpa) essential oil is applied in different fields, including medicine, food, and cosmetic. This study aimed to determine theextraction yield of essential oil from Calamondin peels and optimize the extraction process using Response Surface Methodology (RSM). A three-level three-factors Box Behnken design with three variables including extraction temperature (103-137°C), time (95-145 min), and water to the material ratio (1.32-4.68 mL/g) was adopted. The aforementioned factors are identified to exert significant influence on the essential oil efficiency. Adopting a central composite design, optimal processing conditions were determined. The maximum yield of essential oil was 3.2%, achieved at conditions of the ratio of water and raw materials (3.20:1 mL/g), the temperature of 120.84°C and time of 21.27 min. The results showed good fits with the proposed model for the essential oil extraction (R2 = 99.71%).

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Antioxidant activity, total phenolics and flavonoids contents of Pandanus amaryllifolius (Roxb.)

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

作者： N T C Quyen N T N Quyen L T H Nhan T Q Toan 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 Graduate University of Science and Technology Vietnam Academy of Science and Technology Ha Noi Vietnam Department of Chemical Engineering HCMC University of Technology VNU-HCM Ho Chi Minh City Vietnam Institute of Natural Products Chemistry Vietnam Academy of Science and Technology Ha Noi Vietnam

Pandanus amaryllifolius Roxb. was commonly used in Vietnam as a fragrance because of its aroma. These aromatic plants are the primary source of medicinal herbs because of their valuable biological activities. This study was aimed at determining the phytochemical content, Total flavonoids contents (TFC), total phenolic content (TPC) and antioxidants were analyzed by Folin-Ciocalteu and DPPH scavenging assays, respectively. The total flavonoid content is measured by the aluminum chloride method. The qualitative phytochemical analysis confirmed the presence of flavonoids, terpenoids, coumarin, and reducing sugar, which is chemical components in Pandanus amaryllifolius Roxb extract. Results showed that ethanol extract exhibited higher DPPH (129.327 ug/ml) and TPC (38.12 mgGAE/DW) activity than water extraction (265.738 ug/ml and 10.97 mgGAE/DW). Research shows that using this plant more in pharmaceuticals or food should be focused and developed.

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Synergistic Anticancer Therapy by Ovalbumin Encapsulation‐Enabled Tandem Reactive Oxygen Species Generation

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Angewandte Chemie 2020年第45期132卷

作者： Shuai Jiang Ming Xiao Wen Sun Daniel Crespy Volker Mailänder Xiaojun Peng Jiangli Fan Katharina Landfester State Key Laboratory of Fine Chemicals Dalian University of Technology 2 Linggong Road Hi-tech Zone Dalian 116024 China Max Planck Institute for Polymer Research Ackermannweg 10 55128 Mainz Germany Ningbo Institute of Dalian University of Technology 26 Yucai Road Jiangbei District Ningbo 315016 China Department of Materials Science and Engineering School of Molecular Science and Engineering Vidyasirimedhi Institute of Science and Technology (VISTEC) Rayong 21210 Thailand Department of Dermatology University Clinic of the Johannes Gutenberg-University Mainz Langenbeck str. 1 55131 Mainz Germany

The anticancer efficacy of photodynamic therapy (PDT) is limited due to the hypoxic features of solid tumors. We report synergistic PDT/chemotherapy with integrated tandem Fenton reactions mediated by ovalbumin encapsulation for improved in vivo anticancer therapy via an enhanced reactive oxygen species (ROS) generation mechanism. O 2 .− produced by the PDT is converted to H 2 O 2 by superoxide dismutase, followed by the transformation of H 2 O 2 to the highly toxic . OH via Fenton reactions by Fe 2+ originating from the dissolution of co‐loaded Fe 3 O 4 nanoparticles. The PDT process further facilitates the endosomal/lysosomal escape of the active agents and enhances their intracellular delivery to the nucleus—even for drug‐resistant cells. Cisplatin generates O 2 .− in the presence of nicotinamide adenine dinucleotide phosphate oxidase and thereby improves the treatment efficiency by serving as an additional O 2 .− source for production of . OH radicals. Improved anticancer efficiency is achieved under both hypoxic and normoxic conditions.

关键词： cisplatin Fenton reactions hypoxic photodynamic therapy synergistic

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