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Anti-inflammatory tirucallane saponins from Paramignya scandens.
Phan, Nguyen Huu Toan,Thuan, Nguyen Thi Dieu,Ngoc, Ninh Thi,Thao, Nguyen Phuong,Kim, Sohyun,Koh, Young Sang,Thanh, Nguyen Van,Cuong, Nguyen Xuan,Nam, Nguyen Hoai,Kiem, Phan Van,Kim, Young Ho,Minh, Cha Pharmaceutical Society of Japan 2015 Chemical & pharmaceutical bulletin Vol.63 No.7
<P>Five new tirucallane saponins, paramignyosides A-E (1-5), were isolated from the water fraction of the Paramignya scandens stem and leaves. Their structures were elucidated on the basis of spectroscopic evidence including high-resolution electrospray ionization mass spectrometry (HR-ESI-MS) and one dimensional (1D)- and 2D-NMR. The effects of isolated compounds on pro-inflammatory cytokines were evaluated by measuring the production of interleukin (IL)-12 p40, IL-6, and tumor necrosis factor-α (TNF-α) in lipopolysaccharide (LPS)-stimulated bone marrow-derived dendritic cells (BMDCs). Paramignyoside C (3) exhibited selective and potent inhibitory effect (IC50=5.030.19??M) on the production of IL-12 p40 comparable to that of the positive control, SB203580 (IC50=5.000.16??M). Further studies are required to confirm efficacy in vivo and the mechanism of anti-inflammatory effects.</P>
Thuan Nguyen,Duong Nguyen-Huu,Thinh Nguyen 한국통신학회 2021 Journal of communications and networks Vol.23 No.4
Recent free-space optical (FSO) communication tech nologies have demonstrated the feasibility of building WiFO, a highcapacity indoor wireless network using the femtocell architecture. In this paper, we introduce a cooperative transmission frameworkusing location assisted coding (LAC) technique to increase the over all wireless capacity. For a given network topology, LAC pro vides three different schemes with different coding/decoding pro cedures. Based on these schemes, achievable zero-error rate re gions for WiFO using LAC will be characterized. Both numericaland theoretical analyses are given to validate the proposed codingschemes.
Production of glycoalkaloids from callus cultures of Solanum hainanense Hance
Nguyen Hoang Loc,양문식,김태금,Nguyen Huu Thuan Anh,Doan Huu Nhat Binh 한국식물생명공학회 2010 식물생명공학회지 Vol.37 No.1
Leaf explants of the Solanum hainanense plant,grown in vitro, were cultured in basal Murashige and Skoog (MS) media supplemented with 0.5 mg/L kinetin and 1 mg/L 2,4-dichlorophenoxyacetic acid (2,4-D) for callus initiation. For maintenance and proliferation, the callus was cultured on MS medium supplemented with 1 mg/L 6-benzylaminopurine (BAP) and 0.5 mg/L 2,4-D. The glycoalkaloid content in the callus was at its maximum after ten weeks of culture (188.65 mg/g), whereas that of the one-year-old control was 22.22 mg/g in the root and 5.99 mg/g in the stem. The glycoalkaloid extracted from the callus inhibited the activity of collagenase on collagen gel. High performance liquid chromatography (HPLC) analysis showed that biotransformation occurred when a callus was grown on medium supplemented with various carbon sources. These results suggest that callus of S. hainanense is a good material for production of glycoalkaloid.
Production of glycoalkaloids from callus cultures of Solanum hainanense Hance
Loc, Nguyen Hoang,Anh, Nguyen Huu Thuan,Binh, Doan Huu Nhat,Yang, Moon-Sik,Kim, Tae-Geum The Korean Society of Plant Biotechnology 2010 식물생명공학회지 Vol.37 No.1
Leaf explants of the Solanum hainanense plant, grown in vitro, were cultured in basal Murashige and Skoog (MS) media supplemented with 0.5 mg/L kinetin and 1 mg/L 2,4-dichlorophenoxyacetic acid (2,4-D) for callus initiation. For maintenance and proliferation, the callus was cultured on MS medium supplemented with 1 mg/L 6-benzylaminopurine (BAP) and 0.5 mg/L 2,4-D. The glycoalkaloid content in the callus was at its maximum after ten weeks of culture (188.65 mg/g), whereas that of the one-year-old control was 22.22 mg/g in the root and 5.99 mg/g in the stem. The glycoalkaloid extracted from the callus inhibited the activity of collagenase on collagen gel. High performance liquid chromatography (HPLC) analysis showed that biotransformation occurred when a callus was grown on medium supplemented with various carbon sources. These results suggest that callus of S. hainanense is a good material for production of glycoalkaloid.
A Real-time Implementation of Object Tracking Algorithms Fusion for Thermal Imaging Sequences
Nguyen Ngoc Hung,Cao Huu Tinh,Nguyen Vi Thuan,Pham Ngoc Van 대한전자공학회 2022 IEIE Transactions on Smart Processing & Computing Vol.11 No.4
Object tracking is a widely used algorithm in image processing. When tracking objects on thermal images, however, issues, such as changes in size, temporary occlusion, lack of prominent features, and active thermal noise, are frequently encountered. This article proposes using Multi- Processor System on Chip (MPSoC) technology to implement new tracking algorithms on programmable hardware platforms to increase the computational speed. This real-time algorithm will combine the superiority of existing object tracking algorithms, such as Camshift, Kalman, and Optical Flow, to overcome the difficulties mentioned above.
Tu Anh Do,Mang Tia,Thuan Huu Nguyen,Tuyet Thi Hoang,Tam Duc Tran 대한토목학회 2022 KSCE Journal of Civil Engineering Vol.26 No.1
Three-dimensional finite element (FE) thermal and stress models were created to compute the temperature evolution, thermal stress and potential of cracking in a segmental concrete box girder segment during construction. User-defined subroutines were developed in the ANSYS program to activate the degree of hydration-dependent heat rate and material properties, and creep behavior in the thermal and stress calculations. The developed FE model was verified with experimental measurements of a concrete cube. Adiabatic temperature rise, together with compressive strength and splitting tensile strength for a high-strength concrete mix typically used in construction of box girders were tested and incorporated in the subroutines. The effect of casting time and placement season (summer and winter), initial concrete temperature change, and insulation on the risk of cracking in a cast-in-situ box girder segment at early ages was investigated using the proposed model. The results indicate that the temperature difference between the segment’s middle and the gate corner is very large leading to a high cracking risk. Use of an insulation material such as blankets along with casting concrete at the nighttime would significantly lessen the thermal tensile stress and thus could reduce cracking risk in the segment.
Triterpenoids from aerial parts of Glochidion eriocarpum.
Thu, Vu Kim,Kiem, Phan Van,Yen, Pham Hai,Nhiem, Nguyen Xuan,Tung, Nguyen Huu,Cuong, Nguyen Xuan,Minh, Chau Van,Huong, Hoang Thanh,Lau, Trinh Van,Thuan, Ngo Thi,Kim, Young Ho Natural Product Communications 2010 Natural product communications Vol.5 No.3
<P>From the aerial parts of Glochidion eriocarpum, a new triterpene, glochieriol (1), three new triterpenoid saponins, glochieriosides C - E (2 - 4), together with four known triterpenes (glochidonol, glochidiol, lupeol, and 3-epi-lupeol) were isolated by using combined chromatographic separations. The structures of the new compounds were elucidated on the basis of spectroscopic data, including FTICR-MS, 1D and 2D NMR.</P>