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Search Results: 1 - 10 of 1629 matches for " Nong Thi Hue "
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Hsp90 and reactive oxygen species regulate thermotolerance of rice seedlings via induction of heat shock factor A2 (OsHSFA2) and galactinol synthase 1 (OsGolS1)  [PDF]
Nong Thi Hue, Huong Thi Tran, Thuy Phan, Junya Nakamura, Tomoe Iwata, Keisuke Harano, Yushi Ishibashi, Takashi Yuasa, Mari Iwaya-Inoue
Agricultural Sciences (AS) , 2013, DOI: 10.4236/as.2013.43023
Abstract:

Heat stress induces expression of a set of thermotolerance-related genes in plants. We focused on rice (Oryza sativa L.) homologs of the gene family that encodes galactinol synthase (OsGolS), which is closely related to the Arabidopsis thaliana galactinol synthase (AtGolS) family whose expression is induced under various stresses. OsGolS1 was highly up-regulated compare to the level of OsGolS2 in re- sponse to heat stress. Interestingly, OsGolS1 was also up-regulated by treatment with the Hsp90 inhibitor, geldanamycin (GDA). Expression profiles of OsGolS1 were correlated to those of OsHsfA2 under the GDA treatments. Treatment with GDA increased expression of OsHsfA2, but marginally increased or did not change OsHsfA1 expression. Notably, gel shift assay indicated that OsHsfA2 binds directly to OsGolS1 promoter region and that OsHsfA1 also binds to the promoter regions of OsHsfA2. Both OsHsfA2 and OsGolS1 were dramatically induced in response to heat stress. Accordingly, galactinol and raffinose contents in rice seedlings increased significantly following the induction of OsGolS1. Pre-treatment of rice seedlings with raffinose or GDA improved their thermotolerance. These results suggest that OsGolS1 plays an important role in response to heat stress, possibly via the transcription cascade of OsHsfA1-OsHsfA2 that leads to galactinol and raffinose accumulation, and that the increased content of these carbohydrates is a

key response factor for rice seedlings to enhance thermotolerance.
Wrinkled 1 (WRI1) Homologs, AP2-Type Transcription Factors Involving Master Regulation of Seed Storage Oil Synthesis in Castor Bean (Ricinus communisL.)  [PDF]
Daichi Tajima, Ayami Kaneko, Masatsugu Sakamoto, Yumena Ito, Nong Thi Hue, Masayuki Miyazaki, Yushi Ishibashi, Takashi Yuasa, Mari Iwaya-Inoue
American Journal of Plant Sciences (AJPS) , 2013, DOI: 10.4236/ajps.2013.42044
Abstract: Among APETALA2 (AP2)-type plant specific transcription factor family, WRINKLED1 (WRI1), has appeared to be a master gene transcriptionally regulating a set of carbon metabolism- and fatty acid synthesis (FAS)-related genes responsible for seed specific triacylglycerols (TAGs) storage in oil plants. B3 type transcription factors, such as ABI3 and FUS3, are known to be involved in seed development, such as seed storage protein synthesis and maturation. Based on the recent whole genome sequence data of castor bean (Ricinus communis L.), putative WRI1 homologs (RcWRI1, RcWRI2) specifically expressed in castor bean seed have been identified by comparing organ specific expression profiles among seed development-related transcription factors, seed storage specific genes (Ricin, RcOleosin) and a set of FAS genes including genes for sucrose synthase (RcSUS2), biotin carboxyl carrier protein (a subunit of acetyl-CoA carboxylase, RcBCCP2) and ketoacyl-acyl carrier protein synthase (RcKAS1). Immunoreactive signals with WRI1, FUS3 and ABI5-related polypeptides were also detected in seed specifically, consistent with the expression profiles of seed development-related genes. The WRI1 binding consensus sites, [CnTnG](n)(7)[CG], designated as the AW-box, were found at the promoter region of RcBCCP2 and RcKAS1. Thus, RcWRI1 possibly play a pivotal role in seed specific TAGs storage during seed development by directly activating FAS -related genes.
Fabrication of nano-structured Titania - Thin-Films on Carbon-coated Nickel sheets
Wilfried Wunderlich,Nguyen Thi Hue,Sakae Tanemura
Physics , 2004,
Abstract: This research for Eco-materials focuses on the improvement of photo response of titania thin films. The goal of this research is to find a suitable substrate for decreasing the band-gap of titania, to improve the microstructure and to seek for new processing techniques in nano-meter scale. The sol-gel technique using titanium-tetra-iso-propoxide (TTIP), di-ethanol-amine (DEA) and ethanol was applied by using the dip-coating method. The substrate is a nickel-sheet covered with amorphous carbon-layers or carbon-nano-tubes (CNT), both produced with plasma- enhanced chemical vapor deposition (PECVD) by varying the temperature and the gas molecule velocity. The microstructure of these titania thin films show nanometer-structured pores, which are supposed to decrease the band gap according to the literature. Possible applications for photo catalytic devices will be discussed.
Increasing Public Participation through Awareness Raising Activities: A Case Study in Trao Reef Marine Reserve, Vietnam
Hang Thi Minh Tran,Loke Ming Chou,Hue Thu Nguyen
Environment and Natural Resources Research (ENRR) , 2012, DOI: 10.5539/enrr.v3n1p24
Abstract: In the last few decades, community-based management has evolved to become an effective approach in managing natural resources and solving environmental problems around the world. In this approach, stakeholder participation is considered as a very important factor contributing to the success or failure of the management effort. To promote and enhance stakeholder participation, awareness raising activities could be conducted in various innovative forms. This is clearly illustrated in the case of Trao Reef, a locally-managed marine reserve in central Vietnam. The paper reviews the management approach applied to Trao Reef, focusing on analysis of stakeholder participation. The high level of environmental awareness of the local community contributed to the successful outcome of the project. Many communication activities and awareness raising campaigns were organized within the community to get them involved in all steps of the management process. The project enhanced the marine resources and ecosystem health, and helped to build a more sustainable livelihood and living lifestyle for the local community. Trao Reef has become a role model for effective environmental management that harmonizes the socio-economic benefits of the local community and nature conservation.
Assessment of Vietnam Coastal Wetland Vulnerability for Sustainable Use (Case Study in Xuanthuy Ramsar Site, Vietnam)
Mai Trong Nhuan,Nguyen Thi Minh Ngoc,Nghiem Quynh Huong,Nguyen Thi Hong Hue,Nguyen Tai Tue,Pham Bao Ngoc
Journal of Wetlands Ecology , 2009, DOI: 10.3126/jowe.v2i1.1850
Abstract: For sustainable use of coastal wetland ecosystems, vulnerability of the Xuan Thuy Ramsar site in the northern coast of Vietnam, an internationally important area for feeding and roosting of migratory water birds, is assessed. The assessment tools include 1) a geographical information system database, which describes physical, socio-economic, and environmental conditions; 2) spatial multi-criteria decision analysis, and 3) evaluating criteria by a pair-wise comparison method. Consequently, coastal vulnerability criteria were determined following three periods of a year with different density of migrating birds: the highest density period - from September to March of the following year; the average density period - April and from August to October; the lowest density period - the remain time in year. For each period, 5 levels of vulnerability (from 1-lowest to 5-highest level) were determined. High vulnerability level is concentrated in a great area, belonging to the ecological restored area and the south of communes Giao Thien, Giao Xuan; Low vulnerability level is distributed in communes of the buffer zone. Correspondingly to each vulnerability level, recommendations are given for the risk management, resource use, environment protection and human activities.? Keywords: wetland, vulnerability, Ramsar site, hazard, sustainable use DOI: 10.3126/jowe.v2i1.1850 Journal of Wetlands Ecology , (2009) vol. 2, pp 1-16 ?
Toll-Like Receptor 4 (TLR4) and Typhoid Fever in Vietnam
Nguyen Thi Hue, Mai Ngoc Lanh, Le Thi Phuong, Ha Vinh, Nguyen Tran Chinh, Tran Tinh Hien, Nguyen T. Hieu, Jeremy J. Farrar, Sarah J. Dunstan
PLOS ONE , 2009, DOI: 10.1371/journal.pone.0004800
Abstract: Understanding the host genetic susceptibility to typhoid fever may provide a better understanding of pathogenesis and help in the development of new therapeutics and vaccines. Here we determine the genetic variation within the human TLR4 gene encoding the principal receptor for bacterial endotoxin recognition in typhoid fever patients. It is possible that genetic variants of TLR4 could detrimentally affect the innate immune response against S. typhi infection. Mutation detection and genotyping of TLR4 was performed on DNA from 414 Vietnamese typhoid fever patients and 372 population controls. dHPLC detected a total of 10 polymorphisms within the upstream and exonic regions of TLR4, of which 7 are novel. Two SNPs, T4025A and C4215G, were more frequent in typhoid cases than in controls however due to their low allele frequencies they showed borderline significance (T4025A: OR 1.9, 95%CI 0.9–4.3, P 0.07 and C4215G: OR 6.7, 95%CI 0.8–307, P 0.04). Six missense mutations were identified, with 5/6 positioned in the ectoplasmic domain. Four missense mutations and one promoter SNP (A-271G) were only present in typhoid cases, albeit at low allele frequencies. Here we determined the extent of genetic variation within TLR4 in a Vietnamese population and suggest that TLR4 may be involved in defense against typhoid fever in this population.
Leuconostoc Mesenteroides Growth in Food Products: Prediction and Sensitivity Analysis by Adaptive-Network-Based Fuzzy Inference Systems
Hue-Yu Wang, Ching-Feng Wen, Yu-Hsien Chiu, I-Nong Lee, Hao-Yun Kao, I-Chen Lee, Wen-Hsien Ho
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0064995
Abstract: Background An adaptive-network-based fuzzy inference system (ANFIS) was compared with an artificial neural network (ANN) in terms of accuracy in predicting the combined effects of temperature (10.5 to 24.5°C), pH level (5.5 to 7.5), sodium chloride level (0.25% to 6.25%) and sodium nitrite level (0 to 200 ppm) on the growth rate of Leuconostoc mesenteroides under aerobic and anaerobic conditions. Methods The ANFIS and ANN models were compared in terms of six statistical indices calculated by comparing their prediction results with actual data: mean absolute percentage error (MAPE), root mean square error (RMSE), standard error of prediction percentage (SEP), bias factor (Bf), accuracy factor (Af), and absolute fraction of variance (R2). Graphical plots were also used for model comparison. Conclusions The learning-based systems obtained encouraging prediction results. Sensitivity analyses of the four environmental factors showed that temperature and, to a lesser extent, NaCl had the most influence on accuracy in predicting the growth rate of Leuconostoc mesenteroides under aerobic and anaerobic conditions. The observed effectiveness of ANFIS for modeling microbial kinetic parameters confirms its potential use as a supplemental tool in predictive mycology. Comparisons between growth rates predicted by ANFIS and actual experimental data also confirmed the high accuracy of the Gaussian membership function in ANFIS. Comparisons of the six statistical indices under both aerobic and anaerobic conditions also showed that the ANFIS model was better than all ANN models in predicting the four kinetic parameters. Therefore, the ANFIS model is a valuable tool for quickly predicting the growth rate of Leuconostoc mesenteroides under aerobic and anaerobic conditions.
Sensitivity and Specificity of a Novel Classifier for the Early Diagnosis of Dengue
Nguyen Minh Tuan?,Ho Thi Nhan?,Nguyen Van Vinh Chau?,Nguyen Thanh Hung?,Ha Manh Tuan?,Ta Van Tram?,Nguyen Le Da Ha?,Phan Loi?,Han Khoi Quang?,Duong Thi Hue Kien
PLOS Neglected Tropical Diseases , 2015, DOI: 10.1371/journal.pntd.0003638
Abstract: Background Dengue is the commonest arboviral disease of humans. An early and accurate diagnosis of dengue can support clinical management, surveillance and disease control and is central to achieving the World Health Organisation target of a 50% reduction in dengue case mortality by 2020. Methods 5729 children with fever of <72hrs duration were enrolled into this multicenter prospective study in southern Vietnam between 2010-2012. A composite of gold standard diagnostic tests identified 1692 dengue cases. Using statistical methods, a novel Early Dengue Classifier (EDC) was developed that used patient age, white blood cell count and platelet count to discriminate dengue cases from non-dengue cases. Results The EDC had a sensitivity of 74.8% (95%CI: 73.0-76.8%) and specificity of 76.3% (95%CI: 75.2-77.6%) for the diagnosis of dengue. As an adjunctive test alongside NS1 rapid testing, sensitivity of the composite test was 91.6% (95%CI: 90.4-92.9%). Conclusions We demonstrate that the early diagnosis of dengue can be enhanced beyond the current standard of care using a simple evidence-based algorithm. The results should support patient management and clinical trials of specific therapies.
Weak Greedy Routing over Graph Embedding for Wireless Sensor Networks  [PDF]
Zhigang Li, Nong Xiao
Wireless Sensor Network (WSN) , 2010, DOI: 10.4236/wsn.2010.29082
Abstract: In this paper we classify the greedy routing in sensor networks into two categories, strong greedy routing and weak greedy routing. Most existing work mainly focuses on weak greedy routing over geographic location network or strong greedy routing over greedy embedding network. It is a difficult job and needs much cost to obtain geographic location or greedy embedding of the network. We propose a light-weight Tree-based graph embedding (TGE) for sensor networks. Over the TGE, we design a weak greedy routing protocol, TGR. TGR can archive good performance on path stretch factor and load balance factor.
The Relative Efficiency of the Conditional Root Square Estimation of Parameter in Inhomogeneous Equality Restricted Linear Model  [PDF]
Xiu-Li Nong
American Journal of Computational Mathematics (AJCM) , 2012, DOI: 10.4236/ajcm.2012.23031
Abstract: This paper made a discuss on the relative efficiency of the generalized conditional root square estimation and the specific conditional root square estimation in paper [1,2] in inhomogeneous equality restricted linear model. It is shown that the generalized conditional root squares estimation has not smaller the relative efficiency than the specific conditional root square estimation, by a constraint condition in root squares parameter, we compare bounds of them, thus, choose appropriate squares parameter, the generalized conditional root square estimation has the good performance on mean squares error.
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