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- Sự xuất bảnKhảo sát các thông số kỹ thuật trong quá trình trích ly Pectin từ vỏ sầu riêng bằng phương pháp trích ly siêu âm(Trường Đại học Nguyễn Tất Thành (Khoa Kỹ thuật Thực phẩm và Môi trường), 2018) Đỗ, Hoàng Thanh Uyên; Nguyễn, Hồng Phương Uyên (Hướng dẫn)Video trình bày về thực hành và khảo sát các thông số kỹ thuật trong quá trình trích ly Pectin từ vỏ sầu riêng bằng phương pháp trích ly siêu âm
- Sự xuất bảnPhân lập vi khuẩn Acetic, Lactic và nấm men từ Kombucha và đánh giá hiệu quả lên men vi sinh vật(Trường Đại học Nguyễn Tất Thành (Khoa Kỹ thuật Thực phẩm và môi trường), 2018) Dương, Thị Vân Anh; Nguyễn, Như Ngọc (Hướng dẫn)Video trình bày về: các quy trình thực hiện đề tài phân lập vi khuẩn Acetic, Lactic và nấm men từ Kombucha và đánh giá hiệu quả lên men vi sinh vật
- Sự xuất bảnÁp dụng phương pháp phân giải cao để dự đoán và phân lập chất từ cao Methanol của cây Thường Xuân (Hedera Nepalensis K.Koch)(Trường Đại học Nguyễn Tất Thành (Khoa Kỹ thuật Thực phẩm và Môi trường), 2018) Trần, Thị Kim Ngân; Nguyễn, Thị Ngọc Lan (hướng dẫn)Video trình bày về Khóa luận tốt nghiệp đề tài Áp dụng phương pháp phân giải cao để dự đoán và phân lập chất từ cao Methanol của cây Thường Xuân (Hedera Nepalensis K.Koch) trong Hội thảo sinh viên Nghiên cứu khoa học Lần 5 năm 2022
- Sự xuất bảnBiodegradable films made of carboxymethyl cellulose and gelatin combined with betel leaves extract in food preservation(Trường Đại học Nguyễn Tất Thành (Khoa Kỹ thuật Thực phẩm và Môi trường), 2018) Nguyen, Tran Tu Duyen; Do, Minh Huy (instructor)This video is Introduct the topic: Biodegradable films made of carboxymethyl cellulose and gelatin combined with betel leaves extract in food preservation
- Sự xuất bảnNâng cao hàm lượng hợp chất Alpha Terpineol từ phân đoạn phần cặn của tinh dầu tràm sử dụng phương pháp chưng cất phân đoạn(Trường Đại học Nguyễn Tất Thành (Khoa Kỹ thuật Thực phẩm và Môi trường), 2018) Trịnh, Lê Minh TínhVideo trình bày về giới thiệu và thực hành nâng cao hàm lượng hợp chất Alpha Terpineol từ phân đoạn phần cặn của tinh dầu tràm sử dụng phương pháp chưng cất phân đoạn
- Tài liệuLaboratory-scale Extraction of Essential Oil from Black Pepper(Institute of Applied Technology and Sustainable Development, Nguyen Tat Thanh University, 2019-10) Dang, Thi Cam Huong, ST; Nguyen, Dinh Phuc, MDOptimal conditions for hydrodistillation were determined as an extraction time of approximately 60 minutes, a NaCl concentration of 2%, and a water-to-material ratio of 1:15 g/mL, yielding a maximum of 2.19%. For steam distillation, the optimal parameters were 500g of material, an extraction time of about 45 minutes at an evaporation rate of 0.13 ml/s, resulting in a highest yield of 1.57%. In micro-assisted hydrodistillation, the best conditions included an extraction time of approximately 30 minutes, a water-to-material ratio of 1:4 g/mL, and an extraction power of 380W, achieving a maximum yield of 1.4%. GC-MS analysis identified 70 components, constituting 99% of the total composition. The primary compounds in black pepper essential oil were β-caryophyllene, 3-carene, D-limonene, β-pinene, and α-phellandrene.
- Tài liệuThe Extraction Of Rosemary Essential Oil By Microwave Assisted Distillation(Institute of Applied Technology and Sustainable Development, Nguyen Tat Thanh University, 2019-10) Mai, Thi Thuy Linh, ST; Nguyen, Dinh Phuc, MDRosemary (Rosmarinus officinalis L.) has been a significant herb with recognized antiseptic, astringent, antifungal, antibacterial, and antioxidant properties. This study aimed to optimize the microwave-assisted distillation process for extracting rosemary essential oil by investigating the effects of feed-solvent ratio, distillation power, feed leaf size, and distillation time on the yield. Optimal extraction conditions were determined as a feed-solvent ratio of 1:1, distillation power of 380W, distillation time of 25 minutes, and feed leaf size of 0.8-1 cm, resulting in a maximum yield of 2.7%. The study provided a comparative analysis of essential oil quality and quantity and proposed a mechanism for microwave-assisted extraction of rosemary essential oils.
- Tài liệuFabrication of Rosemary Essential Oil Nanoemulsions via Phase Inversion Temperature(Institute of Applied Technology and Sustainable Development, Nguyen Tat Thanh University; AOTA International Joint Stock Company, Ho Chi Minh City, 2019-10) Le, Minh Thuy Duong, ST; Luu, Xuan Cuong, PhD; Nguyen, Dinh Phuc, MDThis research aimed to develop a rosemary essential oil nanoemulsion using the phase inversion temperature method. Various factors influencing emulsion formation and characteristics, including oil phase composition, surfactant type, and mixing temperature, were investigated. The phase inversion temperature of the system was determined to be approximately 70°C. Among the surfactants evaluated, Tween 80 exhibited exceptional performance in producing nanoemulsions. Nanoemulsions containing up to 10% oil phase could be successfully formulated using 10% Tween 80. Stability testing indicated that the rosemary nanoemulsion remained stable for over 30 days. These findings hold potential for expanding the utilization of rosemary essential oil.
- Tài liệuA comparison of chemical composition and antioxidant activity in various Vietnamese garlic oil samples(Institute of Applied Technology and Sustainable Development, Nguyen Tat Thanh University, 2020-10) Nguyen, Thi Ngoc Lan, MDGarlic is a familiar spice in all households and in medicine. It is also known for its potent antioxidant and anti-cancer properties. This study determined the optimal combination of operating parameters for the hydrodistillation of Ly Son garlic essential oil. The effects of distillation time, water-to-material ratio, soaking time in NaCl solution, and NaCl concentration on the yield of essential oil extraction were investigated. The results established the optimal extraction conditions as follows: distillation time of 2.5 hours, soaking time of 1 hour, NaCl concentration of 2%, and a water-to-material ratio of 1:7. Under these conditions, the maximum yield obtained was 3%. Ly Son garlic exhibited the highest antioxidant capacity, while Phan Rang garlic showed the lowest.
- Tài liệuAssessment Of The Total Phenolic Contents And Antioxidant Capacities In Roasted Ground Coffee Products In Viet Nam(Nguyen Tat Thanh University, 2022-09) Nguyen, Nhut Truong; Tran, Bui Phuc; Nguyen, Cong HauCoffee tree is a popular non-alcoholic beverage in the world thanks to its taste and health benefits to humans. TPC results in descending order: light > medium > dark, in which light roast gives the highest total phenolic compounds. Besides, TPC and TEAC differ in degrees of roasting, with light roasting mainly showing the highest value due to the balance between the breakdown of phenolic compounds and the generation of new antioxidant compounds. mainly from the Maillard reactions. The close correlation between TPC and antioxidant capacity for the correlation coefficient (R2> 0.7) suggests that phenolic compounds play an important role in the antioxidant capacity of coffee.
- Tài liệuStudy On Factors Affecting The Hydrolysis Of Coconut Oil(Institute of Applied Technology and Sustainable Development, Nguyen Tat Thanh University, 2022-10) Le, Tran An Vi; Do, Dinh NhatUnlike most other vegetable oils, coconut oil is about 92% saturated fatty acids and contains many medium-chain fatty acids (MCFAs); it is a prevalent ingredient in the chemical industry of fatty oil worldwide. The value of fatty acids has spurred the development of methods for producing fatty acids in coconut oil. The enzymatic hydrolysis method is an excellent way to protect the hydrolyzed product and keep some product properties as desired. The process can obtain a cleaner product, which is a primary concern in food, cosmetic, and biomedical applications. This study aimed to perform the hydrolysis of coconut oil using lipase enzyme catalysis to recover free fatty acids. Various factors affecting the degree of hydrolysis, including the ratio of coconut oil to buffer, lipase enzyme concentration, pH, temperature, and reaction time, were considered. It was found that the optimal parameters for coconut oil hydrolysis are as follows: the ratio of coconut oil to buffer of 1:4, lipase enzyme content of 3%, pH of 7.5, reaction temperature of 50 °C, and a hydrolysis time of 6 hours to achieve the highest degree of hydrolysis at 53%. This finding may contribute to enhancing the economic value of coconut oil.
- Tài liệuEvaluation of the contamination of Antibiotic resistant E. coli at a Wastewater treatment plant in Ho Chi Minh(Trường Đại học Nguyễn Tất Thành (Ngành Quản lý Tài nguyên Môi trường), 2024) Huynh, Nhu Hao; Thai, Bao Duy; Le, Thai HoangAntibiotic resistance is an emerging global problem threatening human health as resistant bacteria become difficult or impossible to treat with existing antibacterial drugs. Contamination of antibiotics or substances with antimicrobial activity from human discharge activities including domestic, agricultural, and industrial activities is believed to be the leading cause of antibiotic resistance development. In this study, the indole test and the disk diffusion method are used to confirm E. coli and to measure the multidrug resistance of E. coli in wastewater. As the results, the indole test showed that the highest percentage of positive colonies in S1 about 75-100% and the lowest in S5 about 45-60%. The disk diffusion test showed that E. coli strains resistant to 1 of 5 target antibiotics (Amikacin, Amoxicillin/clavulanic acid, Cefixime, ciprofloxacin, Sulfamethoxazole/Trimethoprim) isolated from wastewater samples gave a total of cross-resistance with other antibiotics is very high. Many strains are resistant to more than 1 antibiotic, especially Amikacin resistant strains have the resistance rate to all 5 antibiotics tested up to 31.25%. The results showed that antibiotic-resistant pollution is present in wastewater in Ho Chi Minh City, and specific action plans need to be taken to minimize the level of pollution as well as the possibility of spreading antibiotic resistance in the environment.
- Tài liệuCircular economy for pig farm in Viet Nam(Trường Đại học Nguyễn Tất Thành (Quản lý Tài nguyên Môi trường), 2024) Huynh, Do Anh Thu; Nguyen, Thi Cam Huong; Nguyen, Thi Thanh Xuan; Tra, Van HungPig farming has provided an important source of income for farmers. However, alongside its many benefits, animal husbandry also brings significant problems such as diseases and environmental pollution. Notably, the failure to safely treat livestock waste has serious impacts on both the environment and people. Integrated livestock models have been successful in minimizing pig herd pollution and increasing farmers' incomes. Reusing waste from pig farms to produce fertilizer for crops is essential in reducing environmental pollution. Livestock waste is a recyclable resource for crop fertilization, which can benefit family farms both economically and environmentally. Research and production of fulvic bio-organic fertilizer – amino acids from pig farm emissions – aim to protect the environment and promote sustainable development. An experimental model on the effect of foliar fertilizer on leafy vegetable crops was conducted in vegetable gardens in Hoc Mon district.
- Tài liệuGelatin/Carboxymethyl Cellulose Edible Films: Modification Of Physical Properties By Different Hydrocolloids And Application In Beef Preservation In Combination With Shallot Waste Powder(Department of Food Technology, Institute of Applied Technology and Sustainable Development, Nguyen Tat Thanh University, Vietnam, 2024) Tran, Thi Tuong Vi; Nguyen, Nhu Ngoc; Nguyen, Quoc Duy; Nguyen, Tran Phong; Lien, Tuyet NganIn this work, a gelatin/carboxymethyl cellulose (CMC) base formulation was first modified by using different hydrocolloids like oxidized starch (1404), hydroxypropyl starch (1440), locust bean gum, xanthan gum, and guar gum. The properties of modified films were characterized using SEM, FT-IR, XRD and TGA-DSC before selecting of best-modified film for further development with shallot waste powder. SEM images showed that the rough or heterogeneous surface of the base was changed to more even and smooth depending on the hydrocolloids used while FTIR results demonstrated that a new NCO functional group nonexistent in the base formulation was found for most of the modified films, implying that the modification led to the formation of this functional group. Compared to other hydrocolloids, the addition of guar gum into the gelatin/CMC base has improved its properties such as better color appearance, higher stability, and less weight loss during thermal degradation, and had minimal effect on the structure of resulting films. Subsequently, the incorporation of spray-dried shallot peel powder into gelatin/CMC/guar gum was conducted to investigate the applicability of edible films in the preservation of raw beef. Antibacterial activity assays revealed that the films can inhibit and kill both Gram-positive and Gram-negative bacteria as well as fungi. It is noteworthy that the addition of 0.5% shallot powder not only effectively decelerated the microbial growth but also destroyed E. coli during 11 days of storage (2.8 log CFU g-1) and the bacterial count was even lower than that of uncoated raw beef on day 0 (3.3 log CFU g-1).
- Tài liệuSynthesis Of Silver Nanoparticles Using Essential Oils And Preliminrary Examination Of Its Antibacterial Acitivity(Nguyen Tat Thanh University, Faculty Of Enviromental And Food Engineering, 2024) Phan, Nguyen Yen Nhi; Trieu, Quoc AnIn this study, silver nanoparticles (AgNPs) were synthesized green chemically from diluted acetone essential oil. The influencing parameters when synthesizing such as the effect of essential oils, the effect of pH, the effect of the concentration of the essential oil, the effect of the concentration of silver nitrate, the effect of temperature, the antibacterial ability. Structural features of biosynthesized AgNPs were determined by color observation, methods such as UV-Vis absorption spectroscopy, Dynamic Light Scattering and Transmission Electron Microscopy, which showed the spherical shape of AgNPs with the size of 28 – 80 nm. In addition, there is antibacterial activity of the suspension system of AgNPs as against gram-negative and gram-positive bacteria such as Staphylococcus Aureus (S.aureus), E.coli, Bacillus cereus.
- Tài liệuMicroencapsulation Of Roselle (Hibiscus Sabdariffa L.) Anthocyanins: Effects Of Drying Conditions On Some Physicochemical Properties And Antioxidant Activities Of Spray-Dried Powder(Department of Food Technology, Institute of Applied Technology and Sustainable Development, Nguyen Tat Thanh University, Vietnam, 2024) Nguyen, Quoc Duy; Dang, Thanh Thuy; Nguyen, Thi Van Linh; Nguyen, Thi Thuy Dung; Nguyen, Nhu NgocAnthocyanins are important phytochemical compounds in nature that are of interest not only for their health benefits such as antioxidant, anti-inflammatory, and anti- carcinogenic properties, but also for their role in imparting attractive and characteristic color to food products. In this study, anthocyanins from hibiscus (Hibiscus sabdariffa L.) calyces were microencapsulated by spray-drying technique using maltodextrin as the carrier. The experiment was carried out in the full factorial design with two factors, namely inlet temperature (150, 160, and 170°C) and anthocyanin to maltodextrin mass ratio (1:50, 1:60, 1:70, 1:80, 1:90, and 1:100) with the aim of investigating the effect of spray drying conditions on phenolic content, anthocyanin, antioxidant activity, and color of spray-dried hibiscus powder. The results showed that increasing the carrier ratio significantly reduced the antioxidant content and their activities in the powder. However, the high level of carriers exhibited a protective effect in encapsulating anthocyanin compounds into the maltodextrin matrix, which was demonstrated by high encapsulation efficiency (>85%) observed in the samples prepared at a ratio of 1:100. It should be highlighted that although high temperature (170°C) reduced total anthocyanin concentration, it actually enhanced total phenolic content. In addition, the moisture content of the powder declined with increasing carrier ratio and inlet temperature, and it was found to be in the range of 5.57%– 10.19% in the powder. With solubility greater than 93.71%, the total phenolic and total anthocyanin content of spray-dried hibiscus powder were 31.5–41.9 (mg gallic acid equivalent/g of dry powder) and 6.08–10.47 (mg cyanidin-3-glucoside/g of dry powder), respectively. [6]
- Tài liệuCombination photocatalystic process with h2o2 for enhancement diclofenac removal in wastewater(Trường Đại học Nguyễn Tất Thành (Quản lý Tài nguyên Môi trường), 2024) Pham, Van Thuong; Tra, Van TungDiclofenac (DCF) is a synthetic nonsteroidal anti-inflammatory drug and is widely used for the treatment of inflammatory and painful diseases of rheumatic and non-rheumatic origin. It is a chemical that is difficult to biodegrade and difficult to completely remove by a conventional wastewater treatment plant. A large amount of DCF already in use in Europe (EU) has been detected in many cooperatives in EU countries. In recent years, higher-order oxidation processes have been applied to treat DCF by various processes including photocatalysis such as the TiO2/UV process. Heterocatalytic photocatalysts are increasingly widely applied with high decomposition efficiency as well as good photocatalytic activity, non-toxic, chemically inert and low cost.
- Tài liệuA mini-review on shallow-bed constructed wetlands: a promising innovative green roof(Trường Đại học Nguyễn Tất Thành (Ngành Quản lý tài nguyên môi trường), 2024) Vo, Thi Dieu HienShallow-bed constructed wetland (SCW) has been used as a secondary wastewater treatment technology with low cost, less maintaining and operational requirements and environmental friendliness. Green roof has been considered an effective solution in saving energy, enhancing green space, providing landscape aesthetics, limiting stormwater runoff causing flooding, and purifying air pollutants. Recently, a wetland roof (WR) has been interested as a good integration of these two technologies. To gain an insight understanding of this combination, this review aimed to provide the potential applications of SCW on the roof as a WR. Factors affecting performance, benefits and challenges of SCW were also presented.The literature data showed WR was a promising green technology that needed to be investigated and scaled-up in the future.
- Tài liệuThe Microwave-assisted Extraction Of Anthocyanins, Total Phenolic Compounds And The Antioxidant Activity In Morus Nigra l. (Black Mulberry) Grown In The Da Lat City, Lam Dong Province, Vietnam(Department of Food Technology, Institute of Applied Technology and Sustainable Development, Nguyen Tat Thanh University, Vietnam; College of Agriculture, Can Tho University, Can Tho City, Vietnam; Department of Chemical Technology, Nong Lam University, Ho Chi Minh City, Viet Nam, 2024) Lam, Chan Tai; Nguyen, Thi Ngoc Lan; Tran, Thanh Truc; Mai, Huynh Cang; Nguyen, Hong Khoi NguyenMorus nigra L. (Black mulberry) is a nutritious fruit that contains many bioactive compounds such as anthocyanins, polyhenol and antioxidant activity. The microwave-assisted extraction method (MAE) is an advanced method with due to its advantages of short extraction time and lower solvent consumption. The objective of this research is to find the appropriate conditions to extract the highest contents of anthocyanin, polyphenol and antioxidant activity in black mulberry by MAE method. The pH-differential method is used to determine the anthocyanin content, the polyphenol content is determined by the Folin-Ciocalteu method and the antioxidant activity is determined by the DPPH method. The highest contents of these coumponds were obtained as follows anthocyanin contents 128.07 mg/L, polyphenol contents 4305.38 mg/L and antioxidant activity 2715.68 μmol/L when extracted under conditions of concentration of ethanol 60o, solid to solvent ratio 1:30, microwave power 600W, microwave-assisted extraction time 2 minutes.
- Tài liệuMicroencapsulation of roselle (Hibiscus sabdariffa L.) anthocyanins: Effects of different carriers on selected physicochemical properties and antioxidant activities of spray-dried and freeze-dried powder(Trường Đại học Nguyễn Tất Thành (Công nghệ thực phẩm), 2024) Quoc, Duy Nguyen; Thanh, Thuy Dang; Thi, Van Linh Nguyen; Thi, Thuy Dung Nguyen; Nhu, Ngoc NguyenAnthocyanins are abundant phytochemicals in nature that draw the public interest not only in their health effects, such as antioxidant, anti-inflammatory and anti-carcinogenic properties. It also showed their function in providing foodstuffs with appealing and distinctive color. In this study, anthocyanins from hibiscus (Hibiscus sabdariffa L.) calyces were microencapsulated by spray drying and freeze drying techniques using a wide variety of carriers including maltodextrin (MD), gum Arabic (GA) and their binary blends with inulin (INU) and konjac glucomannan (KON). The results showed that freeze-dried hibiscus powder using KON as carrier had the highest phenolic, anthocyanin and antioxidant activity, followed by spray-dried and freeze-dried MD/KON samples, which indicated the role of KON in the effective retention of antioxidants during the drying process. In addition, the ferric and cupric ion reduction activity (FRAP and CUPRAC) of the spray- dried samples was significantly higher than those of the freeze-dried powder. However, in terms of encapsulation efficiency (EE) of anthocyanins, KON was shown to be ineffective in entrapping these compounds in microcapsules with the lowest EE of freeze-dried KON and spray-dried MD/KON of 43.6% and 55.4%, respectively. By contrast, MD/GA was the most effective carrier, retaining anthocyanins inside the carrier matrix and limiting their loss to the surface of the microcapsules in both spray-drying and freeze-drying methods (EE of 91.8% and 95.7%, respectively). In addition, the moisture content of spray-dried powder samples was significantly higher than that of lyophilized powders, and the solubility of all samples was above 94.1%. [6]