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4,241 results on '"Hoa Nguyen"'

214. On the action of the Steenrod-Milnor operations on the invariants of the general linear groups

Author

Hoa, Nguyen Thai, Minh, Pham Thi Kim, and Sum, Nguyen

Subjects
Mathematics - Algebraic Topology, Primary 55S10, Secondary 55S05
Abstract

Let $p$ be an odd prime number. Denote by $GL_n = GL(n,\mathbb F_p)$ the general linear group over the prime field $\mathbb F_p$. Each subgroup of $GL_n$ acts on the algebra $P_n=E(x_1,\ldots,x_n)\otimes \mathbb F_p(y_1,\ldots,y_n)$ in the usual manner. We grade $P_n$ by assigning $\dim x_i=1$ and $\dim y_i=2.$ This algebra is a module over the mod $p$ Steenrod algebra $\mathcal A_p$. The purpose of the paper is to compute the action of the Steenrod-Milnor operations on the generators of $P_2^{GL_2}$. More precisely, we explicitly determine the action of $St^{(i,j)}$ on the Dickson invariants $Q_{2,0}$ and $Q_{2,1}$., Comment: 7 pages

Published
2017

215. Oleanane-type triterpenoid sulphates, two new α-glucosidase inhibitors from Elaeocarpus hainanensis.

Author

Cham, Ba Thi, Dinh Hoang, Vu, Thuy Linh, Nguyen Thi, Hoa, Nguyen Thi Thu, Hoang Anh, Nguyen Thi, Tai, Bui Huu, Nhung, Le Thi Hong, Delfino, Domenico V., and Thuy, Trinh Thi

Subjects
CHEMICAL structure, TRITERPENES, SULFATES, ACARBOSE, DATA analysis
Abstract

In connection with our interest in the phytochemical investigation of Elaeocarpus hainanensis Oliv. (Elaeocarpaceae) growing in Vietnam, two new sulphated oleanane triterpenes were obtained herein and structurally identified. Based on the combination of the extensive 1D-, 2D NMR and HR ESI MS spectroscopic data analysis, their chemical structures have been elucidated as 1α,3β-dihydroxy-olean-18-ene 1-sulphate (1) and 1α,3β-dihydroxy-olean-12-ene 1-sulphate (2). Notably, compounds 1 and 2 are corroborating the proposition that triterpenoid sulphates serve as chemosystematic markers of the Elaeocarpus genus. Additionally, all these two new compounds 1 and 2 strongly inhibited α-glucosidase in vitro with the respective IC50 values of 3.81 ± 0.33 µM and 21.27 ± 0.48 µM, which were significantly better than that obtained from positive control, acarbose (IC50 247.73 ± 11.85 µM). [ABSTRACT FROM AUTHOR]

Published
2024
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223. Force-Velocity Relation of Dampers in Horizontal Washing Machines

Author

Hoa, Nguyen Thi, Khoa, Ngo Nhu, Kacprzyk, Janusz, Series Editor, Gomide, Fernando, Advisory Editor, Kaynak, Okyay, Advisory Editor, Liu, Derong, Advisory Editor, Pedrycz, Witold, Advisory Editor, Polycarpou, Marios M., Advisory Editor, Rudas, Imre J., Advisory Editor, Wang, Jun, Advisory Editor, Sattler, Kai-Uwe, editor, Nguyen, Duy Cuong, editor, Vu, Ngoc Pi, editor, Long, Banh Tien, editor, and Puta, Horst, editor

Published
2021
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228. Evidence for a primate origin of zoonotic Helicobacter suis colonizing domesticated pigs

Author

Flahou, Bram, Rossi, Mirko, Bakker, Jaco, Langermans, Jan AM, Heuvelman, Edwin, Solnick, Jay V, Martin, Miriam E, O’Rourke, Jani, Ngoan, Le Duc, Hoa, Nguyen Xuan, Nakamura, Masahiko, Øverby, Anders, Matsui, Hidenori, Ota, Hiroyoshi, Matsumoto, Takehisa, Foss, Dennis L, Kopta, Laurice A, Omotosho, Oladipo, Franciosini, Maria Pia, Casagrande Proietti, Patrizia, Guo, Aizhen, Liu, Han, Borilova, Gabriela, Bracarense, Ana Paula, Lindén, Sara K, De Bruyckere, Sofie, Zhang, Guangzhi, De Witte, Chloë, Smet, Annemieke, Pasmans, Frank, Ducatelle, Richard, Corander, Jukka, and Haesebrouck, Freddy

Subjects
Biological Sciences, Environmental Sciences, Infectious Diseases, Emerging Infectious Diseases, Digestive Diseases, Infection, Animals, Animals, Domestic, Helicobacter Infections, Helicobacter heilmannii, Humans, Macaca fascicularis, Macaca mulatta, Phylogeny, Stomach, Swine, Swine Diseases, Technology, Microbiology, Biological sciences, Environmental sciences
Abstract

Helicobacter suis is the second most prevalent Helicobacter species in the stomach of humans suffering from gastric disease. This bacterium mainly inhabits the stomach of domesticated pigs, in which it causes gastric disease, but it appears to be absent in wild boars. Interestingly, it also colonizes the stomach of asymptomatic rhesus and cynomolgus monkeys. The origin of modern human-, pig- or non-human primate-associated H. suis strains in these respective host populations was hitherto unknown. Here we show that H. suis in pigs possibly originates from non-human primates. Our data suggest that a host jump from macaques to pigs happened between 100 000 and 15 000 years ago and that pig domestication has had a significant impact on the spread of H. suis in the pig population, from where this pathogen occasionally infects humans. Thus, in contrast to our expectations, H. suis appears to have evolved in its main host in a completely different way than its close relative Helicobacter pylori in humans.

Published
2018

236. An Optimized MnO2-Ag Nanocomposite-Based Sensing Platform for Determination of 4-nitrophenol in Tomato Samples: Influences of Morphological Aspect of MnO2 Nanostructures and Synergic Effect on Electrochemical Kinetic Parameters and Analytical Performance

Author

Nguyen Le, Nhat Trang, primary, Pham, Tuyet Nhung, additional, Ong, Van Hoang, additional, Dao Thi, Nguyet Nga, additional, Hoa, Nguyen Quang, additional, Oanh, Vu Thi Kim, additional, Vu Dinh, Lam, additional, and Le, Anh-Tuan, additional

Published
2024
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242. Antibiotic prescribing practices of medical doctors in a resource-limited setting and the influence of individual perceptions and stewardship support: a survey in three tertiary hospitals in Vietnam

Author

Vu, Huong Thi Lan, primary, Pham, Thuy Thi Thanh, additional, Duong, Yen Hai, additional, Truong, Quan Anh, additional, Nguyen, Hong Khanh, additional, Nguyen, Tu Thi Cam, additional, Trinh, Long Xuan, additional, Nguyen, Ha Thi Hong, additional, Le, Minh Quang, additional, Vu, Vinh Hai, additional, Chau, Duc Minh, additional, Huynh, Nguyet Thi, additional, Vo, Em Thi Hoang Dung, additional, Le, Hoa Nguyen Minh, additional, Pham, Thach Ngoc, additional, Pollack, Todd M, additional, and Van Doorn, H Rogier, additional

Published
2024
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