The thesis may be consulted by you, provided you comply with the provisions of the Act and the fo... more The thesis may be consulted by you, provided you comply with the provisions of the Act and the following conditions of use: Any use you make of these documents or images must be for research or private study purposes only, and you may not make them available to any other person. Authors control the copyright of their thesis. You will recognise the author's right to be identified as the author of the thesis, and due acknowledgement will be made to the author where appropriate. You will obtain the author's permission before publishing any material from the thesis.
Journal of Radioanalytical and Nuclear Chemistry, 2022
There are eight famous thermal water sources, with medium temperature, neutral pH, high ranges of... more There are eight famous thermal water sources, with medium temperature, neutral pH, high ranges of TDS values located in different carbonate formations in Northern Vietnam. The chemical composition results showed the major elements present were Na, K, Mg, Ca, Sr, while trace amounts of rare earth elements (REE), Ag, As, Pb, Th, U were observed. The 210Po activity concentration and the annual committed effective doses for adults, children, and infants in all study areas were far less than 100 mBq L−1 and 0.1 mSv y−1, respectively. Some significant correlations between 210Po and other chemical components have been observed.
In view that Actinobacteria produce various types of potential antibiotics and enzymes for pharma... more In view that Actinobacteria produce various types of potential antibiotics and enzymes for pharmaceutical industry, some Actinobacteria strains were isolated from the soil samples collected around tree roots in Ho Chi Minh City and Binh Duong province and further screened for the desired bioactivities. After drying at 60 °C for 30 minutes, these soil samples were diluted and spreaded on Gause 1 agar. Forty-seven Actinobacteria strains were isolated. Of these 24/47 (51%) demonstrated antimicrobial activities. The potential KD33 strain was analyzed in term of morphological, biochemical, and antimicrobial characteristics. Antimicrobial activity of the isolated bacteria was identi ed by the agar plug di usion method to detect the antagonism against the tested microorganisms including Staphylococcus aureus ATCC 25923, Staphylococcus aureus ATCC 43300, Enterococcus faecalis ATCC 29212, Escherichia coli ATCC 25922, Pseudomonas aeruginosa ATCC 27853, Klebsiella pneumoniae ATCC 35657 và Cand...
In view that Actinobacteria produce various types of potential antibiotics and enzymes for pharma... more In view that Actinobacteria produce various types of potential antibiotics and enzymes for pharmaceutical industry, some Actinobacteria strains were isolated from the soil samples collected around tree roots in Ho Chi Minh City and Binh Duong province and further screened for the desired bioactivities. After drying at 60 °C for 30 minutes, these soil samples were diluted and spreaded on Gause 1 agar. Forty-seven Actinobacteria strains were isolated. Of these 24/47 (51%) demonstrated antimicrobial activities. The potential KD33 strain was analyzed in term of morphological, biochemical, and antimicrobial characteristics. Antimicrobial activity of the isolated bacteria was identi ed by the agar plug di usion method to detect the antagonism against the tested microorganisms including Staphylococcus aureus ATCC 25923, Staphylococcus aureus ATCC 43300, Enterococcus faecalis ATCC 29212, Escherichia coli ATCC 25922, Pseudomonas aeruginosa ATCC 27853, Klebsiella pneumoniae ATCC 35657 và Cand...
Instrumented indentation testing was used to determine viscoelastic properties of bitumen, i.e. s... more Instrumented indentation testing was used to determine viscoelastic properties of bitumen, i.e. shear relaxation modulus. Review of previous studied reveals that indentation testing technique has been drawing increasing attempts in investigations of binder material mechanical properties. Various properties of bitumen, e.g. elastic, viscoelastic, have been successfully determined by indentation testing at different scales and test conditions. The response of bitumen to indentation was studied extensively under a wide range of test parameters such as temperature, loading rate, indenter geometry, etc. This experimental tool was also applied to asphalt cements grading and microstructure study. However, there have been limited numbers of studies at macro levels with the use of spherical indenters to characterize bitumen properties. This motivated the present study. Spherical indentations have been performed with balls of different curvature radii at -5 oC. Load – displacement curves have...
This paper reviews the feedbacks between structural transformation and agriculture, on the one ha... more This paper reviews the feedbacks between structural transformation and agriculture, on the one hand, and climate and the natural environment, on the other. The longstanding, dominant economic development narrative largely ignores nature's influence on factor productivity and stocks, even as it increasingly illustrates how agricultural technological change and economic growth affect nature. We articulate some of the missing linkages and pose a range of policy research questions worth exploration concerning structural transformation and the complex feedback among agriculture, nature, and economic growth processes, especially in the lowincome agrarian nations of the Global South.
A 13-year-old right-handed girl had operculoinsular refractory epilepsy with several seizures per... more A 13-year-old right-handed girl had operculoinsular refractory epilepsy with several seizures per week after temporal lobe epilepsy surgery despite appropriate anticonvulsant therapy. Instead of reoperation, she underwent stereotactic radiosurgery (SRS), which was performed using a linac-based Elekta Axesse SRS machine with a marginal dose of 24 Gy (gross target volume: 6.67 cm 3) in one fraction. Post-radiosurgery, she had no clinical or radiological complications. She was maintained on two anti-seizure medications following treatment (valproate and levetiracetam) and was seizure free at the time of this report (during four weeks after SRS). Monthly follow-up was planned for the evaluation of long-term outcomes. SRS may be a safe option for treating intractable focal epilepsy or recurrent epilepsy after surgery failure in children.
Giới thiệu: Sử dụng hCG truyền thống để khởi động trưởng thành noãn ở những bệnh nhân đáp ứng cao... more Giới thiệu: Sử dụng hCG truyền thống để khởi động trưởng thành noãn ở những bệnh nhân đáp ứng cao với kích thích buồng trứng tiềm ẩn nguy cơ quá kích buồng trứng. GnRHa trigger có thể gây ra một đỉnh LH đủ để gây trưởng thành noãn và dự phòng được nguy cơ quá kích buồng trứng nhưng lại gây suy hoàng thể bất thường dẫn đến giảm tỉ lệ có thai, từ đó đòi hỏi phải có một phác đồ hỗ trợ hoàng thể thích hợp. Một cách tiếp cận mới là sử dụng dual trigger bao gồm GnRHa phối hợp với hCG liều thấp để gây trưởng thành nang noãn, hạn chế quá kích buồng trứng nhưng vẫn duy trì được hoạt động hoàng thể để đảm bảo tỉ lệ có thai. Mục đích của nghiên cứu này nhằm đánh giá hiệu quả của dual trigger lên kết cục IVF và khả năng dự phòng quá kích buồng trứng của phác đồ dual trigger trên nhóm bệnh nhân đáp ứng cao với kích thích buồng trứng. Phương pháp nghiên cứu: Thử nghiệm lâm sàng có nhóm chứng trên 124 bệnh nhân đáp ứng cao với KTBT bằng phác đồ GnRH antagonist (10-18 nang noãn đường kính từ 14mm, ...
Asteraceae species were widely applied in traditional medicines in Asia countries as sources of n... more Asteraceae species were widely applied in traditional medicines in Asia countries as sources of natural antioxidants and antimicrobial agents. This study aimed to evaluate DPPH-scavenging capacities and antimicrobial activities of nine Asteraceae species collected from Southern Vietnam. Antioxidant and antimicrobial activities were determined by standard protocols. Essential oils fromAgeratum conyzoides, Helianthus annuus, Artemisia vulgarisindicated significant inhibitory effects onStaphyloccocus aureusandCandidaspp.. Crude extracts and fractions fromTaraxacum officinale, Chrysanthemum morifolium, Ageratum conyzoides, Tagetes erectashowed inhibitory ability on at least one testing bacterial strains includingS. aureus, Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa. Study on clinical isolates, ethyl acetate fraction fromA. conyzoidesdisplayed the most potent effect on uropathogenicE. coliandK. pneumoniaewith MIC at 1.25-10 mg/ml and 5-12.5 mg/ml, respectively. DPPH ...
Science and Technology Development Journal - Natural Sciences, 2019
In this study, NaCl at varrious concentrations of 4 – 10 g/L was used to investigate the salt tol... more In this study, NaCl at varrious concentrations of 4 – 10 g/L was used to investigate the salt tolerance of in vitro shoot cuttings of Chrysanthemum indicum. Morphological, physiological and biochemical changes during the response of shoot cuttings in the salinity stress were analyzed. NaCl at 6 g/L reduced the development of shoot cuttings. Under salinity stress conditions, there have just a little reduction of the chloroplast in parenchymal cells near the midrib of leaf before they turn brown and die. Besides, carotenoid, starch content, and photosynthesis intensity were decreased. In contrast, respiration rate, proline and total soluble sugar content, and the activity of IAA and gibberellin were strongly increased. The application of IAA 0.25 mg/L, zeatin 0.1 mg/L and GA3 0.1 mg/L improved the shoot development in the salinity stress condition. Shoots in MS medium supplemented with BA 0.2 mg/L, NAA 2 mg/L and NaCl 6 g/L grow better in salinity stress condition.
In this paper, we present a novel methodimage retrieval model for mobile product image searching ... more In this paper, we present a novel methodimage retrieval model for mobile product image searching system. For feature extraction, a method integrating Speeded Up Robust Features (SURF) and Local Binary Pattern (LBP) is proposed. SURF is invariant to rotation, scaling, translation and have low calculated cost, so SURF is quite suitable for mobile product image search model. However, SURF is not effective with the noisy images, blur images, illuminated images. Because LBP operator is invariant to changes in illumination and contrast of images, we use LBP to supplement for disadvantages of the SURF features. Our proposed method can improve accuracy and speed of the system. For query, a query model using K-NN Search with vector quantization is used. This model improve performance and reduce the cost of computation of the mobile product image searching system. The experimental results show the feasibility of our proposal model.
The thesis may be consulted by you, provided you comply with the provisions of the Act and the fo... more The thesis may be consulted by you, provided you comply with the provisions of the Act and the following conditions of use: Any use you make of these documents or images must be for research or private study purposes only, and you may not make them available to any other person. Authors control the copyright of their thesis. You will recognise the author's right to be identified as the author of the thesis, and due acknowledgement will be made to the author where appropriate. You will obtain the author's permission before publishing any material from the thesis.
Journal of Radioanalytical and Nuclear Chemistry, 2022
There are eight famous thermal water sources, with medium temperature, neutral pH, high ranges of... more There are eight famous thermal water sources, with medium temperature, neutral pH, high ranges of TDS values located in different carbonate formations in Northern Vietnam. The chemical composition results showed the major elements present were Na, K, Mg, Ca, Sr, while trace amounts of rare earth elements (REE), Ag, As, Pb, Th, U were observed. The 210Po activity concentration and the annual committed effective doses for adults, children, and infants in all study areas were far less than 100 mBq L−1 and 0.1 mSv y−1, respectively. Some significant correlations between 210Po and other chemical components have been observed.
In view that Actinobacteria produce various types of potential antibiotics and enzymes for pharma... more In view that Actinobacteria produce various types of potential antibiotics and enzymes for pharmaceutical industry, some Actinobacteria strains were isolated from the soil samples collected around tree roots in Ho Chi Minh City and Binh Duong province and further screened for the desired bioactivities. After drying at 60 °C for 30 minutes, these soil samples were diluted and spreaded on Gause 1 agar. Forty-seven Actinobacteria strains were isolated. Of these 24/47 (51%) demonstrated antimicrobial activities. The potential KD33 strain was analyzed in term of morphological, biochemical, and antimicrobial characteristics. Antimicrobial activity of the isolated bacteria was identi ed by the agar plug di usion method to detect the antagonism against the tested microorganisms including Staphylococcus aureus ATCC 25923, Staphylococcus aureus ATCC 43300, Enterococcus faecalis ATCC 29212, Escherichia coli ATCC 25922, Pseudomonas aeruginosa ATCC 27853, Klebsiella pneumoniae ATCC 35657 và Cand...
In view that Actinobacteria produce various types of potential antibiotics and enzymes for pharma... more In view that Actinobacteria produce various types of potential antibiotics and enzymes for pharmaceutical industry, some Actinobacteria strains were isolated from the soil samples collected around tree roots in Ho Chi Minh City and Binh Duong province and further screened for the desired bioactivities. After drying at 60 °C for 30 minutes, these soil samples were diluted and spreaded on Gause 1 agar. Forty-seven Actinobacteria strains were isolated. Of these 24/47 (51%) demonstrated antimicrobial activities. The potential KD33 strain was analyzed in term of morphological, biochemical, and antimicrobial characteristics. Antimicrobial activity of the isolated bacteria was identi ed by the agar plug di usion method to detect the antagonism against the tested microorganisms including Staphylococcus aureus ATCC 25923, Staphylococcus aureus ATCC 43300, Enterococcus faecalis ATCC 29212, Escherichia coli ATCC 25922, Pseudomonas aeruginosa ATCC 27853, Klebsiella pneumoniae ATCC 35657 và Cand...
Instrumented indentation testing was used to determine viscoelastic properties of bitumen, i.e. s... more Instrumented indentation testing was used to determine viscoelastic properties of bitumen, i.e. shear relaxation modulus. Review of previous studied reveals that indentation testing technique has been drawing increasing attempts in investigations of binder material mechanical properties. Various properties of bitumen, e.g. elastic, viscoelastic, have been successfully determined by indentation testing at different scales and test conditions. The response of bitumen to indentation was studied extensively under a wide range of test parameters such as temperature, loading rate, indenter geometry, etc. This experimental tool was also applied to asphalt cements grading and microstructure study. However, there have been limited numbers of studies at macro levels with the use of spherical indenters to characterize bitumen properties. This motivated the present study. Spherical indentations have been performed with balls of different curvature radii at -5 oC. Load – displacement curves have...
This paper reviews the feedbacks between structural transformation and agriculture, on the one ha... more This paper reviews the feedbacks between structural transformation and agriculture, on the one hand, and climate and the natural environment, on the other. The longstanding, dominant economic development narrative largely ignores nature's influence on factor productivity and stocks, even as it increasingly illustrates how agricultural technological change and economic growth affect nature. We articulate some of the missing linkages and pose a range of policy research questions worth exploration concerning structural transformation and the complex feedback among agriculture, nature, and economic growth processes, especially in the lowincome agrarian nations of the Global South.
A 13-year-old right-handed girl had operculoinsular refractory epilepsy with several seizures per... more A 13-year-old right-handed girl had operculoinsular refractory epilepsy with several seizures per week after temporal lobe epilepsy surgery despite appropriate anticonvulsant therapy. Instead of reoperation, she underwent stereotactic radiosurgery (SRS), which was performed using a linac-based Elekta Axesse SRS machine with a marginal dose of 24 Gy (gross target volume: 6.67 cm 3) in one fraction. Post-radiosurgery, she had no clinical or radiological complications. She was maintained on two anti-seizure medications following treatment (valproate and levetiracetam) and was seizure free at the time of this report (during four weeks after SRS). Monthly follow-up was planned for the evaluation of long-term outcomes. SRS may be a safe option for treating intractable focal epilepsy or recurrent epilepsy after surgery failure in children.
Giới thiệu: Sử dụng hCG truyền thống để khởi động trưởng thành noãn ở những bệnh nhân đáp ứng cao... more Giới thiệu: Sử dụng hCG truyền thống để khởi động trưởng thành noãn ở những bệnh nhân đáp ứng cao với kích thích buồng trứng tiềm ẩn nguy cơ quá kích buồng trứng. GnRHa trigger có thể gây ra một đỉnh LH đủ để gây trưởng thành noãn và dự phòng được nguy cơ quá kích buồng trứng nhưng lại gây suy hoàng thể bất thường dẫn đến giảm tỉ lệ có thai, từ đó đòi hỏi phải có một phác đồ hỗ trợ hoàng thể thích hợp. Một cách tiếp cận mới là sử dụng dual trigger bao gồm GnRHa phối hợp với hCG liều thấp để gây trưởng thành nang noãn, hạn chế quá kích buồng trứng nhưng vẫn duy trì được hoạt động hoàng thể để đảm bảo tỉ lệ có thai. Mục đích của nghiên cứu này nhằm đánh giá hiệu quả của dual trigger lên kết cục IVF và khả năng dự phòng quá kích buồng trứng của phác đồ dual trigger trên nhóm bệnh nhân đáp ứng cao với kích thích buồng trứng. Phương pháp nghiên cứu: Thử nghiệm lâm sàng có nhóm chứng trên 124 bệnh nhân đáp ứng cao với KTBT bằng phác đồ GnRH antagonist (10-18 nang noãn đường kính từ 14mm, ...
Asteraceae species were widely applied in traditional medicines in Asia countries as sources of n... more Asteraceae species were widely applied in traditional medicines in Asia countries as sources of natural antioxidants and antimicrobial agents. This study aimed to evaluate DPPH-scavenging capacities and antimicrobial activities of nine Asteraceae species collected from Southern Vietnam. Antioxidant and antimicrobial activities were determined by standard protocols. Essential oils fromAgeratum conyzoides, Helianthus annuus, Artemisia vulgarisindicated significant inhibitory effects onStaphyloccocus aureusandCandidaspp.. Crude extracts and fractions fromTaraxacum officinale, Chrysanthemum morifolium, Ageratum conyzoides, Tagetes erectashowed inhibitory ability on at least one testing bacterial strains includingS. aureus, Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa. Study on clinical isolates, ethyl acetate fraction fromA. conyzoidesdisplayed the most potent effect on uropathogenicE. coliandK. pneumoniaewith MIC at 1.25-10 mg/ml and 5-12.5 mg/ml, respectively. DPPH ...
Science and Technology Development Journal - Natural Sciences, 2019
In this study, NaCl at varrious concentrations of 4 – 10 g/L was used to investigate the salt tol... more In this study, NaCl at varrious concentrations of 4 – 10 g/L was used to investigate the salt tolerance of in vitro shoot cuttings of Chrysanthemum indicum. Morphological, physiological and biochemical changes during the response of shoot cuttings in the salinity stress were analyzed. NaCl at 6 g/L reduced the development of shoot cuttings. Under salinity stress conditions, there have just a little reduction of the chloroplast in parenchymal cells near the midrib of leaf before they turn brown and die. Besides, carotenoid, starch content, and photosynthesis intensity were decreased. In contrast, respiration rate, proline and total soluble sugar content, and the activity of IAA and gibberellin were strongly increased. The application of IAA 0.25 mg/L, zeatin 0.1 mg/L and GA3 0.1 mg/L improved the shoot development in the salinity stress condition. Shoots in MS medium supplemented with BA 0.2 mg/L, NAA 2 mg/L and NaCl 6 g/L grow better in salinity stress condition.
In this paper, we present a novel methodimage retrieval model for mobile product image searching ... more In this paper, we present a novel methodimage retrieval model for mobile product image searching system. For feature extraction, a method integrating Speeded Up Robust Features (SURF) and Local Binary Pattern (LBP) is proposed. SURF is invariant to rotation, scaling, translation and have low calculated cost, so SURF is quite suitable for mobile product image search model. However, SURF is not effective with the noisy images, blur images, illuminated images. Because LBP operator is invariant to changes in illumination and contrast of images, we use LBP to supplement for disadvantages of the SURF features. Our proposed method can improve accuracy and speed of the system. For query, a query model using K-NN Search with vector quantization is used. This model improve performance and reduce the cost of computation of the mobile product image searching system. The experimental results show the feasibility of our proposal model.
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