Phượng Trần - Academia.edu (original) (raw)
Papers by Phượng Trần
Anti-cancer Agents in Medicinal Chemistry, Aug 24, 2016
Journal of Nanomaterials
Crystallization and morphology of perovskite film played an important role to obtain efficient pe... more Crystallization and morphology of perovskite film played an important role to obtain efficient performance of perovskite solar cells. This study is aimed at optimizing the fabrication of hybrid organic–inorganic lead iodide perovskite layer by a two-step method modified by a double dip coating process which enables to control the perovskite crystallization and morphology. The duration time of each circle for the step of dipping PbI2 film to methylammonium iodide solution was varied from 90 to 240 second. The obtained perovskite films were characterized by X-ray diffraction to evaluate the transformation of PbI2 reactant to the perovskite product and its crystallization, by scanning electron microscopy to observe its morphology. Then, the perovskite films were implemented in functional perovskite solar cell devices followed by current–voltage characterization. Results showed that the perovskite was formed via an equilibrium process which reached an optimum transformation of PbI2 to t...
Tạp chí Khoa học Trường Đại học Cần Thơ, Apr 29, 2022
The Beam and Ball system is an unstable object that is often used to test several control algorit... more The Beam and Ball system is an unstable object that is often used to test several control algorithms. Due to the fast movement of the ball on the beam, when the sensor measures the ball position and transmits that data to the computer, the ball has moved to a new position that affects to the control quality. This study focuses on design and implementation of a real model of the beam and ball system, positioning the ball by ultrasonic and
Dong Thap University Journal of Science, 2014
Khi yêu cầu xã hội về chất lượng nguồn nhân lực ngày càng cao, ngoài các kiến thức chuyên môn việ... more Khi yêu cầu xã hội về chất lượng nguồn nhân lực ngày càng cao, ngoài các kiến thức chuyên môn việc trang bị kỹ năng mềm cho sinh viên là rất cần thiết. Trên cơ sở khảo sát, bài viết nêu ra thực trạng việc trang bị kỹ năng mềm của sinh viên Trường Đại học Đồng Tháp, đồng thời đề xuất một số giải pháp nhằm nâng cao chất lượng giảng dạy và có thêm nhiều cơ hội tìm kiếm việc làm sau khi ra trường của sinh viên.
Drug Delivery, 2021
Intratympanic (IT) therapies have been explored to address several side effects that could be cau... more Intratympanic (IT) therapies have been explored to address several side effects that could be caused by systemic administration of steroids to treat inner ear diseases. For effective drug delivery to the inner ear, an IT delivery system was developed using poly(lactic-co-glycolic acid) (PLGA) nanoparticles (NPs) and thermosensitive gels to maintain sustained release. Dexamethasone (DEX) was used as a model drug. The size and zeta potential of PLGA NPs and the gelation time of the thermosensitive gel were measured. In vitro drug release was studied using a Franz diffusion cell. Cytotoxicity of the formulations was investigated using SK-MEL-31 cells. Inflammatory responses were evaluated by histological observation of spiral ganglion cells and stria vascularis in the mouse cochlea 24 h after IT administration. In addition, the biodistribution of the formulations in mouse ears was observed by fluorescence imaging using coumarin-6. DEX-NPs showed a particle size of 150.0 ± 3.2 nm in diameter and a zeta potential of À18.7 ± 0.6. The DEX-NP-gel showed a gelation time of approximately 64 s at 37 C and presented a similar release profile and cytotoxicity as that for DEX-NP. Furthermore, no significant inflammatory response was observed after IT administration. Fluorescence imaging results suggested that DEX-NP-gel sustained release compared to the other formulations. In conclusion, the PLGA NP-loaded thermosensitive gel may be a potential drug delivery system for the inner ear.
Hydrology Research, 2021
Groundwater is a critical component of water resources and has become the primary water supply fo... more Groundwater is a critical component of water resources and has become the primary water supply for agricultural and domestic uses in the Vietnamese Mekong Delta (VMD). Widespread groundwater level declines have occurred in the VMD over recent decades, reflecting that extraction rates exceed aquifer recharge in the region. However, the impacts of climate variability on groundwater system dynamics in the VMD remain poorly understood. Here, we explore recent changes in groundwater levels in shallow and deep aquifers from observed wells in the VMD and investigate their relations to the annual precipitation variability and El Niño–Southern Oscillation (ENSO). We show that groundwater level responds to changes in annual precipitation at time scales of approximately 1 year. Moreover, shallow (deep) groundwater in the VMD appears to correlate with the ENSO over intra-annual (inter-annual) time scales. Our findings reveal a critical linkage between groundwater level changes and climate varia...
Scientific Reports, 2020
The degradation of air quality is the most concerned issue of our society due to its harmful impa... more The degradation of air quality is the most concerned issue of our society due to its harmful impacts on human health, especially in cities with rapid urbanization and population growth like Hanoi, the capital of Vietnam. This study aims at developing a new approach that combines data-driven models and interpolation technique to develop the PM10 concentration maps from meteorological factors for the central area of Hanoi. Data-driven models that relate the PM10 concentration with the meteorological factors at the air quality monitoring stations in the study area were developed using the Multiple Linear Regression (MLR) and Artificial Neural Network (ANN) algorithms. Models’ performance comparison showed that ANN models yielded better goodness-of-fit indices than MLR models at all stations in the study area with average coefficient of correlation (r) and Nash–Sutcliffe Efficiency Index (NSE) of 0.51 and 0.34 for the former, and 0.7 and 0.49 for the latter. These indices indicates that...
Anti-Cancer Agents in Medicinal Chemistry, 2021
Background: Mucoadhesive polymers play a critical role in controlled-release tablets for buccal d... more Background: Mucoadhesive polymers play a critical role in controlled-release tablets for buccal drug delivery. Objective: This research aimed to investigate the characterization and mechanisms of solid lipid particle-based tablets with different mucoadhesive polymers for buccal delivery. Methods: Prednisolone (PSL)-loaded solid lipid particles (SLPs) were conventionally prepared by ultrasonication. The freeze-drying method was used to convert the SLP suspension into a solid dosage form for buccal delivery by using mucoadhesive polymers. Results: All formulations showed over 80% drug release after 6 h, which followed immediate and sustained release patterns depending on the SLP type. However, the different polymers in the formulations resulted in different mucoadhesion times and drug release and drug permeability profiles. HPMC 4000 showed higher drug permeation (3327 μg vs. 2589 μg after 6 h) but a shorter mucoadhesion time than Carbopol (197 min vs. 361 min). In addition, surface m...
![Research paper thumbnail of Microwave-assisted intramolecular FriedelCrafts acylation of some aryl aliphatic acids using Gd(OTf)3/ [BMI]BF4 catalytic system](https://attachments.academia-assets.com/113935350/thumbnails/1.jpg)
](Science and Technology Development Journal, 2016
Intramolecular Friedel–Crafts acylation of aryl acids is a “green” reaction and environmentally b... more Intramolecular Friedel–Crafts acylation of aryl acids is a “green” reaction and environmentally benign, generates some valuable intermediated compounds for pharmaceutical uses. In addition, metal triflates under microwave irradiation are efficient catalysts, solving many problems when using traditional Lewis acids. Gd(OTf)3/[BMI]BF4, a good catalyst for the intramolecular Friedel–Crafts acylation under mild condition with high yield, reduced the reaction time and pollution. Furthermore, Gd(OTf)3 in [BMI]BF4 was easily recovered and reused without significant loss of its activity
Science and Technology Development Journal, 2016
Layered double hydroxides derived Cu-Al metal oxides were found to be an efficient catalytic reag... more Layered double hydroxides derived Cu-Al metal oxides were found to be an efficient catalytic reagent for the reaction of indole benzaldehydes. In this report, we prepared series of (Cu/Al)-CO3 layered double hydroxides with the unchanging ratio of Cu/Al = 3 : 1 and it was subsequently calcinated in air at 500 oC. The materials were characterized by means of Inductively Coupled Plasma emission (ICP), X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and, thermogravimetry (TG). The materials were calcinated at 500 oC and tested as catalysts in the alkylation reaction of indole with benzaldehydes.
Science and Technology Development Journal - Natural Sciences, 2020
The liquid electrolyte transports lithium ions from anode to cathode during charging, and vice ve... more The liquid electrolyte transports lithium ions from anode to cathode during charging, and vice versa. The choice of electrolyte is also important since high ionic conductivity between electrodes is essential for high-performance batteries. Liquid electrolytes with lithium salt dissolved in an organic solvent have been widely used since the 1970s when lithium primary batteries were first developed. Most lithium secondary batteries available today use organic electrolytes. Ionic liquids consist of organic cations and inorganic anions, due to the absence of a combustible and flammable organic solvent, they are known to produce safer batteries. Furthermore, they have a high polarity that allows dissolution of inorganic and organic metal compounds, and they can exist in a liquid state over a wide temperature range. Another type of solvent with similar physical properties and phase behavior to ILs is deep eutectic solvents (DESs) about which the first paper was recently published in 2001....
Land use/land cover (LULC) and climate changes are two main factors directly affecting hydrologic... more Land use/land cover (LULC) and climate changes are two main factors directly affecting hydrologic conditions. However, very few studies in Vietnam have investigated changes in hydrological process under the impact of climate and land use changes on a basin scale. The objective of this study is to assess the individual and combined impacts of land use and climate changes on hydrological processes for the Nam Rom river basin, Northwestern Viet Nam using Remote Sensing (RS) and Soil and Water Assessment Tools (SWAT) model. SWAT model was used for hydrological process simulation. Results indicated that SWAT proved to be a powerful tool in simulating the impacts of land use and climate change on catchment hydrology. The change in historical land use between 1992 and 2015 strongly contributed to increasing hydrological processes (ET, percolation, ground water, and water yield), whereas, climate change led to significant decrease of all hydrological components. The combination of land use ...
RSC Advances, 2017
A green and efficient method for the synthesis of 3-acylindoles using a Brønsted acidic ionic liq... more A green and efficient method for the synthesis of 3-acylindoles using a Brønsted acidic ionic liquid under microwave irradiation has been developed.
Anti-cancer agents in medicinal chemistry, Nov 21, 2017
The aim of this study was to develop and compare polymeric micelles of fucoidan, a sulfated polys... more The aim of this study was to develop and compare polymeric micelles of fucoidan, a sulfated polysaccharide, and hydrophobic drugs such as paclitaxel and curcumin. Paclitaxel and curcumin are both known for their medicinal properties, including anticancer efficacy. However, their very low water solubility, absorption and rapid metabolism leads to reduced bioavailability. To redress these problems and enhance anti-cancer therapeutics using fucoidan, polymeric micelles were synthesized from conjugates of fucoidan and hydrophobic drugs. The chemical conjugation of fucoidan and hydrophobic drugs has been achieved by utilizing reactive functional groups on the molecules, such as carboxylic groups and hydroxyl groups. The micelles revealed a homogeneous spherical morphology, size, negative surface charge. Fourier transform infrared spectroscopy was used to investigate the physicochemical properties of the polymeric micelles, which form a self-assembled polymeric micelle in aqueous medium. ...
Journal of Korean Pharmaceutical Sciences, 2009
Environmental Science: Processes & Impacts, 2015
A lithotrophic iron-oxidizing microbial fuel cell containing an enriched iron-oxidizing bacterial... more A lithotrophic iron-oxidizing microbial fuel cell containing an enriched iron-oxidizing bacterial consortium has the potential to be used as a biosensor for detecting iron in water samples.
Food Science and Biotechnology, 2013
A brewing process for rice-grape wine, in which rice powder and grapes are concurrently fermented... more A brewing process for rice-grape wine, in which rice powder and grapes are concurrently fermented, was developed. Rice powder was mixed with α-glucosidase, glucose isomerase, and yeast, and then incubated for 2 days at 25 o C. Then a mixture of 'Muscat Baily A' and 'Campbell Early' grape must was added to the fermented mixture of rice and maintained at 4 o C to allow for complete ethanol fermentation. The rice-grape wine contained 11.6% ethanol, compared to 9.6% ethanol for grape wine. The aroma profile revealed that 2-methyl-1-propanol, 2-methyl propyl acetate, and phenethyl acetate were in greater abundance in the rice-grape wine, whereas ethyl hexanoate, diethyl succinate, and ethyl decanoate were more abundant in the grape wine. The esters formed from fatty acids and ethanol increased during 2 years of storage for both wines. An electronic nose analysis revealed no significant difference in the aromas of the rice-grape and grape wine samples.
Can Tho University Journal of Science
Vì tính phi tuyến, bất ổn và có trễ truyền dữ liệu, hệ cầu cân bằng với thanh và bóng khá khó kiể... more Vì tính phi tuyến, bất ổn và có trễ truyền dữ liệu, hệ cầu cân bằng với thanh và bóng khá khó kiểm soát. Nghiên cứu này đề xuất kết hợp điều khiển vi-tích phân-tỷ lệ (PID) và điều khiển giám sát dùng mạng nơ-ron hàm cơ sở xuyên tâm (RBF), gọi là điều khiển RBF-PID, trên mô hình thật của hệ cầu cân bằng. Mô hình này đã được chế tạo từ trước, có tích hợp bộ bù sai số và thời gian trễ. Bộ điều khiển PID đóng vai trò đưa đáp ứng về gần giá trị tham khảo. Nhiệm vụ tinh chỉnh đáp ứng sẽ do bộ RBF đảm trách. Kết quả thực nghiệm trên hệ cầu cân bằng với cơ chế định vị bằng sóng siêu âm cho kết quả tốt hơn các nghiên cứu trước đó. Cụ thể, thời gian tăng của đáp ứng đạt 1,5 ± 0,3 giây; thời gian xác lập đạt 6,5 ± 1,0 giây; tuy độ vọt lố còn khá lớn, khoảng 11 ± 2 %, nhưng sai số xác lập đã được triệt tiêu. Kết quả cho thấy bộ điều khiển RBF-PID thích hợp để kiểm soát hệ thống.
Tạp chí Khoa học Đo đạc và Bản đồ, 2014
Mục tiêu của nghiên cứu này là xây dựng bản đồ 3D-GIS hiện tại và tương lai của quận Hải Châu, th... more Mục tiêu của nghiên cứu này là xây dựng bản đồ 3D-GIS hiện tại và tương lai của quận Hải Châu, thành phố Đà Nẵng. Bài viết trình bày một phương pháp toàn diện, đã ứng dụng công nghệ GIS, GPS và RS cùng với sự phát triển của 3D-GIS để quản lý đô thị dưới dạng 3 chiều với những hiệu ứng và tính năng quản lý mạnh, khả năng chia sẻ thông tin ở mọi nơi một cách linh hoạt, tạo nên bước đột phá trong quản lý không gian đô thị và quy hoạch đô thị, giúp các nhà quản lý có cái nhìn trực quan, chi tiết từng khu vực với nhiều góc độ khác nhau. Các dữ liệu cơ bản về bản đồ DEM, bản đồ hiện trạng, bản đồ địa chính, lớp nhà, lớp giao thông và lớp cây xanh liên quan đến nghiên cứu được thu thập. Sử dụng phần mềm Arcmap và ArcSence để thành lập được bộ cơ sở dữ liệu và bản đồ 3D không gian quận Hải Châu, thành phố Đà Nẵng hiện tại và tương lai. Xây dựng bản đồ 3D-GIS phục vụ quy hoạch không gian đô thị ở thành phố Đà Nẵng nói chung cũng như quận Hải Châu nói riêng có ý nghĩa quan trọng và cần thiết,...
Can Tho University Journal of Science, 2021
Nghiên cứu sử dụng phương pháp so sánh hiện trạng sử dụng đất và chỉ tiêu trong hai kỳ kế hoạch... more Nghiên cứu sử dụng phương pháp so sánh hiện trạng sử dụng đất và chỉ tiêu trong hai kỳ kế hoạch sử dụng đất (2010-2015 và 2015-2020) nhằm đánh giá kết quả thực hiện quy hoạch sử dụng đất thành phố Cần Thơ giai đoạn 2010-2020. Mô hình phân tích EFA và mô hình hồi quy tuyến tính đa biến giúp xác định các yếu tố ảnh hưởng đến quy hoạch sử dụng đất thông qua thực hiện phỏng vấn điều tra với 100 cán bộ quản lý có chuyên môn trong lĩnh vực đất đai. Kết quả nghiên cứu cho thấy việc sử dụng đất thành phố Cần Thơ giai đoạn 2010-2020 chưa đạt theo kế hoạch đề ra. Có 5 nhóm yếu tố ảnh hưởng tích cực đến quy hoạch sử dụng đất thành phố Cần Thơ theo góc nhìn cán bộ quản lý gồm: nhóm yếu tố thể chế, pháp lý, nhóm yếu tố xã hội, nhóm yếu tố kinh tế, nhóm yếu tố môi trường và nhóm các yếu tố khác. Trong thời gian tới, để quy hoạch sử dụng đất thành phố Cần Thơ hiệu quả, các nhà quản lý cần quan tâm: (i) hoàn thiện các quy định của pháp luật về quy hoạch sử dụng đất, (ii) tốc độ...
Anti-cancer Agents in Medicinal Chemistry, Aug 24, 2016
Journal of Nanomaterials
Crystallization and morphology of perovskite film played an important role to obtain efficient pe... more Crystallization and morphology of perovskite film played an important role to obtain efficient performance of perovskite solar cells. This study is aimed at optimizing the fabrication of hybrid organic–inorganic lead iodide perovskite layer by a two-step method modified by a double dip coating process which enables to control the perovskite crystallization and morphology. The duration time of each circle for the step of dipping PbI2 film to methylammonium iodide solution was varied from 90 to 240 second. The obtained perovskite films were characterized by X-ray diffraction to evaluate the transformation of PbI2 reactant to the perovskite product and its crystallization, by scanning electron microscopy to observe its morphology. Then, the perovskite films were implemented in functional perovskite solar cell devices followed by current–voltage characterization. Results showed that the perovskite was formed via an equilibrium process which reached an optimum transformation of PbI2 to t...
Tạp chí Khoa học Trường Đại học Cần Thơ, Apr 29, 2022
The Beam and Ball system is an unstable object that is often used to test several control algorit... more The Beam and Ball system is an unstable object that is often used to test several control algorithms. Due to the fast movement of the ball on the beam, when the sensor measures the ball position and transmits that data to the computer, the ball has moved to a new position that affects to the control quality. This study focuses on design and implementation of a real model of the beam and ball system, positioning the ball by ultrasonic and
Dong Thap University Journal of Science, 2014
Khi yêu cầu xã hội về chất lượng nguồn nhân lực ngày càng cao, ngoài các kiến thức chuyên môn việ... more Khi yêu cầu xã hội về chất lượng nguồn nhân lực ngày càng cao, ngoài các kiến thức chuyên môn việc trang bị kỹ năng mềm cho sinh viên là rất cần thiết. Trên cơ sở khảo sát, bài viết nêu ra thực trạng việc trang bị kỹ năng mềm của sinh viên Trường Đại học Đồng Tháp, đồng thời đề xuất một số giải pháp nhằm nâng cao chất lượng giảng dạy và có thêm nhiều cơ hội tìm kiếm việc làm sau khi ra trường của sinh viên.
Drug Delivery, 2021
Intratympanic (IT) therapies have been explored to address several side effects that could be cau... more Intratympanic (IT) therapies have been explored to address several side effects that could be caused by systemic administration of steroids to treat inner ear diseases. For effective drug delivery to the inner ear, an IT delivery system was developed using poly(lactic-co-glycolic acid) (PLGA) nanoparticles (NPs) and thermosensitive gels to maintain sustained release. Dexamethasone (DEX) was used as a model drug. The size and zeta potential of PLGA NPs and the gelation time of the thermosensitive gel were measured. In vitro drug release was studied using a Franz diffusion cell. Cytotoxicity of the formulations was investigated using SK-MEL-31 cells. Inflammatory responses were evaluated by histological observation of spiral ganglion cells and stria vascularis in the mouse cochlea 24 h after IT administration. In addition, the biodistribution of the formulations in mouse ears was observed by fluorescence imaging using coumarin-6. DEX-NPs showed a particle size of 150.0 ± 3.2 nm in diameter and a zeta potential of À18.7 ± 0.6. The DEX-NP-gel showed a gelation time of approximately 64 s at 37 C and presented a similar release profile and cytotoxicity as that for DEX-NP. Furthermore, no significant inflammatory response was observed after IT administration. Fluorescence imaging results suggested that DEX-NP-gel sustained release compared to the other formulations. In conclusion, the PLGA NP-loaded thermosensitive gel may be a potential drug delivery system for the inner ear.
Hydrology Research, 2021
Groundwater is a critical component of water resources and has become the primary water supply fo... more Groundwater is a critical component of water resources and has become the primary water supply for agricultural and domestic uses in the Vietnamese Mekong Delta (VMD). Widespread groundwater level declines have occurred in the VMD over recent decades, reflecting that extraction rates exceed aquifer recharge in the region. However, the impacts of climate variability on groundwater system dynamics in the VMD remain poorly understood. Here, we explore recent changes in groundwater levels in shallow and deep aquifers from observed wells in the VMD and investigate their relations to the annual precipitation variability and El Niño–Southern Oscillation (ENSO). We show that groundwater level responds to changes in annual precipitation at time scales of approximately 1 year. Moreover, shallow (deep) groundwater in the VMD appears to correlate with the ENSO over intra-annual (inter-annual) time scales. Our findings reveal a critical linkage between groundwater level changes and climate varia...
Scientific Reports, 2020
The degradation of air quality is the most concerned issue of our society due to its harmful impa... more The degradation of air quality is the most concerned issue of our society due to its harmful impacts on human health, especially in cities with rapid urbanization and population growth like Hanoi, the capital of Vietnam. This study aims at developing a new approach that combines data-driven models and interpolation technique to develop the PM10 concentration maps from meteorological factors for the central area of Hanoi. Data-driven models that relate the PM10 concentration with the meteorological factors at the air quality monitoring stations in the study area were developed using the Multiple Linear Regression (MLR) and Artificial Neural Network (ANN) algorithms. Models’ performance comparison showed that ANN models yielded better goodness-of-fit indices than MLR models at all stations in the study area with average coefficient of correlation (r) and Nash–Sutcliffe Efficiency Index (NSE) of 0.51 and 0.34 for the former, and 0.7 and 0.49 for the latter. These indices indicates that...
Anti-Cancer Agents in Medicinal Chemistry, 2021
Background: Mucoadhesive polymers play a critical role in controlled-release tablets for buccal d... more Background: Mucoadhesive polymers play a critical role in controlled-release tablets for buccal drug delivery. Objective: This research aimed to investigate the characterization and mechanisms of solid lipid particle-based tablets with different mucoadhesive polymers for buccal delivery. Methods: Prednisolone (PSL)-loaded solid lipid particles (SLPs) were conventionally prepared by ultrasonication. The freeze-drying method was used to convert the SLP suspension into a solid dosage form for buccal delivery by using mucoadhesive polymers. Results: All formulations showed over 80% drug release after 6 h, which followed immediate and sustained release patterns depending on the SLP type. However, the different polymers in the formulations resulted in different mucoadhesion times and drug release and drug permeability profiles. HPMC 4000 showed higher drug permeation (3327 μg vs. 2589 μg after 6 h) but a shorter mucoadhesion time than Carbopol (197 min vs. 361 min). In addition, surface m...
Science and Technology Development Journal, 2016
Intramolecular Friedel–Crafts acylation of aryl acids is a “green” reaction and environmentally b... more Intramolecular Friedel–Crafts acylation of aryl acids is a “green” reaction and environmentally benign, generates some valuable intermediated compounds for pharmaceutical uses. In addition, metal triflates under microwave irradiation are efficient catalysts, solving many problems when using traditional Lewis acids. Gd(OTf)3/[BMI]BF4, a good catalyst for the intramolecular Friedel–Crafts acylation under mild condition with high yield, reduced the reaction time and pollution. Furthermore, Gd(OTf)3 in [BMI]BF4 was easily recovered and reused without significant loss of its activity
Science and Technology Development Journal, 2016
Layered double hydroxides derived Cu-Al metal oxides were found to be an efficient catalytic reag... more Layered double hydroxides derived Cu-Al metal oxides were found to be an efficient catalytic reagent for the reaction of indole benzaldehydes. In this report, we prepared series of (Cu/Al)-CO3 layered double hydroxides with the unchanging ratio of Cu/Al = 3 : 1 and it was subsequently calcinated in air at 500 oC. The materials were characterized by means of Inductively Coupled Plasma emission (ICP), X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and, thermogravimetry (TG). The materials were calcinated at 500 oC and tested as catalysts in the alkylation reaction of indole with benzaldehydes.
Science and Technology Development Journal - Natural Sciences, 2020
The liquid electrolyte transports lithium ions from anode to cathode during charging, and vice ve... more The liquid electrolyte transports lithium ions from anode to cathode during charging, and vice versa. The choice of electrolyte is also important since high ionic conductivity between electrodes is essential for high-performance batteries. Liquid electrolytes with lithium salt dissolved in an organic solvent have been widely used since the 1970s when lithium primary batteries were first developed. Most lithium secondary batteries available today use organic electrolytes. Ionic liquids consist of organic cations and inorganic anions, due to the absence of a combustible and flammable organic solvent, they are known to produce safer batteries. Furthermore, they have a high polarity that allows dissolution of inorganic and organic metal compounds, and they can exist in a liquid state over a wide temperature range. Another type of solvent with similar physical properties and phase behavior to ILs is deep eutectic solvents (DESs) about which the first paper was recently published in 2001....
Land use/land cover (LULC) and climate changes are two main factors directly affecting hydrologic... more Land use/land cover (LULC) and climate changes are two main factors directly affecting hydrologic conditions. However, very few studies in Vietnam have investigated changes in hydrological process under the impact of climate and land use changes on a basin scale. The objective of this study is to assess the individual and combined impacts of land use and climate changes on hydrological processes for the Nam Rom river basin, Northwestern Viet Nam using Remote Sensing (RS) and Soil and Water Assessment Tools (SWAT) model. SWAT model was used for hydrological process simulation. Results indicated that SWAT proved to be a powerful tool in simulating the impacts of land use and climate change on catchment hydrology. The change in historical land use between 1992 and 2015 strongly contributed to increasing hydrological processes (ET, percolation, ground water, and water yield), whereas, climate change led to significant decrease of all hydrological components. The combination of land use ...
RSC Advances, 2017
A green and efficient method for the synthesis of 3-acylindoles using a Brønsted acidic ionic liq... more A green and efficient method for the synthesis of 3-acylindoles using a Brønsted acidic ionic liquid under microwave irradiation has been developed.
Anti-cancer agents in medicinal chemistry, Nov 21, 2017
The aim of this study was to develop and compare polymeric micelles of fucoidan, a sulfated polys... more The aim of this study was to develop and compare polymeric micelles of fucoidan, a sulfated polysaccharide, and hydrophobic drugs such as paclitaxel and curcumin. Paclitaxel and curcumin are both known for their medicinal properties, including anticancer efficacy. However, their very low water solubility, absorption and rapid metabolism leads to reduced bioavailability. To redress these problems and enhance anti-cancer therapeutics using fucoidan, polymeric micelles were synthesized from conjugates of fucoidan and hydrophobic drugs. The chemical conjugation of fucoidan and hydrophobic drugs has been achieved by utilizing reactive functional groups on the molecules, such as carboxylic groups and hydroxyl groups. The micelles revealed a homogeneous spherical morphology, size, negative surface charge. Fourier transform infrared spectroscopy was used to investigate the physicochemical properties of the polymeric micelles, which form a self-assembled polymeric micelle in aqueous medium. ...
Journal of Korean Pharmaceutical Sciences, 2009
Environmental Science: Processes & Impacts, 2015
A lithotrophic iron-oxidizing microbial fuel cell containing an enriched iron-oxidizing bacterial... more A lithotrophic iron-oxidizing microbial fuel cell containing an enriched iron-oxidizing bacterial consortium has the potential to be used as a biosensor for detecting iron in water samples.
Food Science and Biotechnology, 2013
A brewing process for rice-grape wine, in which rice powder and grapes are concurrently fermented... more A brewing process for rice-grape wine, in which rice powder and grapes are concurrently fermented, was developed. Rice powder was mixed with α-glucosidase, glucose isomerase, and yeast, and then incubated for 2 days at 25 o C. Then a mixture of 'Muscat Baily A' and 'Campbell Early' grape must was added to the fermented mixture of rice and maintained at 4 o C to allow for complete ethanol fermentation. The rice-grape wine contained 11.6% ethanol, compared to 9.6% ethanol for grape wine. The aroma profile revealed that 2-methyl-1-propanol, 2-methyl propyl acetate, and phenethyl acetate were in greater abundance in the rice-grape wine, whereas ethyl hexanoate, diethyl succinate, and ethyl decanoate were more abundant in the grape wine. The esters formed from fatty acids and ethanol increased during 2 years of storage for both wines. An electronic nose analysis revealed no significant difference in the aromas of the rice-grape and grape wine samples.
Can Tho University Journal of Science
Vì tính phi tuyến, bất ổn và có trễ truyền dữ liệu, hệ cầu cân bằng với thanh và bóng khá khó kiể... more Vì tính phi tuyến, bất ổn và có trễ truyền dữ liệu, hệ cầu cân bằng với thanh và bóng khá khó kiểm soát. Nghiên cứu này đề xuất kết hợp điều khiển vi-tích phân-tỷ lệ (PID) và điều khiển giám sát dùng mạng nơ-ron hàm cơ sở xuyên tâm (RBF), gọi là điều khiển RBF-PID, trên mô hình thật của hệ cầu cân bằng. Mô hình này đã được chế tạo từ trước, có tích hợp bộ bù sai số và thời gian trễ. Bộ điều khiển PID đóng vai trò đưa đáp ứng về gần giá trị tham khảo. Nhiệm vụ tinh chỉnh đáp ứng sẽ do bộ RBF đảm trách. Kết quả thực nghiệm trên hệ cầu cân bằng với cơ chế định vị bằng sóng siêu âm cho kết quả tốt hơn các nghiên cứu trước đó. Cụ thể, thời gian tăng của đáp ứng đạt 1,5 ± 0,3 giây; thời gian xác lập đạt 6,5 ± 1,0 giây; tuy độ vọt lố còn khá lớn, khoảng 11 ± 2 %, nhưng sai số xác lập đã được triệt tiêu. Kết quả cho thấy bộ điều khiển RBF-PID thích hợp để kiểm soát hệ thống.
Tạp chí Khoa học Đo đạc và Bản đồ, 2014
Mục tiêu của nghiên cứu này là xây dựng bản đồ 3D-GIS hiện tại và tương lai của quận Hải Châu, th... more Mục tiêu của nghiên cứu này là xây dựng bản đồ 3D-GIS hiện tại và tương lai của quận Hải Châu, thành phố Đà Nẵng. Bài viết trình bày một phương pháp toàn diện, đã ứng dụng công nghệ GIS, GPS và RS cùng với sự phát triển của 3D-GIS để quản lý đô thị dưới dạng 3 chiều với những hiệu ứng và tính năng quản lý mạnh, khả năng chia sẻ thông tin ở mọi nơi một cách linh hoạt, tạo nên bước đột phá trong quản lý không gian đô thị và quy hoạch đô thị, giúp các nhà quản lý có cái nhìn trực quan, chi tiết từng khu vực với nhiều góc độ khác nhau. Các dữ liệu cơ bản về bản đồ DEM, bản đồ hiện trạng, bản đồ địa chính, lớp nhà, lớp giao thông và lớp cây xanh liên quan đến nghiên cứu được thu thập. Sử dụng phần mềm Arcmap và ArcSence để thành lập được bộ cơ sở dữ liệu và bản đồ 3D không gian quận Hải Châu, thành phố Đà Nẵng hiện tại và tương lai. Xây dựng bản đồ 3D-GIS phục vụ quy hoạch không gian đô thị ở thành phố Đà Nẵng nói chung cũng như quận Hải Châu nói riêng có ý nghĩa quan trọng và cần thiết,...
Can Tho University Journal of Science, 2021
Nghiên cứu sử dụng phương pháp so sánh hiện trạng sử dụng đất và chỉ tiêu trong hai kỳ kế hoạch... more Nghiên cứu sử dụng phương pháp so sánh hiện trạng sử dụng đất và chỉ tiêu trong hai kỳ kế hoạch sử dụng đất (2010-2015 và 2015-2020) nhằm đánh giá kết quả thực hiện quy hoạch sử dụng đất thành phố Cần Thơ giai đoạn 2010-2020. Mô hình phân tích EFA và mô hình hồi quy tuyến tính đa biến giúp xác định các yếu tố ảnh hưởng đến quy hoạch sử dụng đất thông qua thực hiện phỏng vấn điều tra với 100 cán bộ quản lý có chuyên môn trong lĩnh vực đất đai. Kết quả nghiên cứu cho thấy việc sử dụng đất thành phố Cần Thơ giai đoạn 2010-2020 chưa đạt theo kế hoạch đề ra. Có 5 nhóm yếu tố ảnh hưởng tích cực đến quy hoạch sử dụng đất thành phố Cần Thơ theo góc nhìn cán bộ quản lý gồm: nhóm yếu tố thể chế, pháp lý, nhóm yếu tố xã hội, nhóm yếu tố kinh tế, nhóm yếu tố môi trường và nhóm các yếu tố khác. Trong thời gian tới, để quy hoạch sử dụng đất thành phố Cần Thơ hiệu quả, các nhà quản lý cần quan tâm: (i) hoàn thiện các quy định của pháp luật về quy hoạch sử dụng đất, (ii) tốc độ...