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https://www.readbyqxmd.com/read/29143264/carbon-emissions-income-relationships-with-structural-breaks-the-case-of-the-middle-eastern-and-north-african-countries
#1
Ghassen El Montasser, Ahdi Noomen Ajmi, Duc Khuong Nguyen
This article revisits the carbon dioxide (CO2) emissions-GDP causal relationships in the Middle Eastern and North African (MENA) countries by employing the Rossi (Economet Theor 21:962-990, 2005) instability-robust causality test. We show evidence of significant causality relationships for all considered countries within the instability context, whereas the standard Granger causality test fails to detect causal links in any direction, except for Egypt, Iran, and Morocco. An important policy implication resulting from this robust analysis is that the income is not affected by the cuts in the CO2 emissions for only two MENA countries, the UAE and Syria...
November 15, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29131815/the-karrikin-receptor-kai2-promotes-drought-resistance-in-arabidopsis-thaliana
#2
Weiqiang Li, Kien Huu Nguyen, Ha Duc Chu, Chien Van Ha, Yasuko Watanabe, Yuriko Osakabe, Marco Antonio Leyva-González, Mayuko Sato, Kiminori Toyooka, Laura Voges, Maho Tanaka, Mohammad Golam Mostofa, Motoaki Seki, Mitsunori Seo, Shinjiro Yamaguchi, David C Nelson, Chunjie Tian, Luis Herrera-Estrella, Lam-Son Phan Tran
Drought causes substantial reductions in crop yields worldwide. Therefore, we set out to identify new chemical and genetic factors that regulate drought resistance in Arabidopsis thaliana. Karrikins (KARs) are a class of butenolide compounds found in smoke that promote seed germination, and have been reported to improve seedling vigor under stressful growth conditions. Here, we discovered that mutations in KARRIKIN INSENSITIVE2 (KAI2), encoding the proposed karrikin receptor, result in hypersensitivity to water deprivation...
November 13, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/29110932/dengue-vaccine-supplies-under-endemic-and-epidemic-conditions-in-three-dengue-endemic-countries-colombia-thailand-and-vietnam
#3
Jung-Seok Lee, Jacqueline K Lim, Duc Anh Dang, Thi Hien Anh Nguyen, Andrew Farlow
BACKGROUND: Dengue fever has been a major public health concern in Colombia, Thailand, and Vietnam. Unlike other infectious diseases, dengue vaccines had not been available for a long time, causing difficulties to control the disease. However, the first live attenuated, tetravalent dengue vaccine (CYD-TDV) became available in 2016 and has been already licensed in some dengue-endemic countries. Because several second-generation dengue vaccines are also in the pipeline, it is critical to understand the efficient allocation of dengue vaccines considering the geographical variation of the disease...
October 27, 2017: Vaccine
https://www.readbyqxmd.com/read/29108844/liver-transplantation-for-primary-hepatic-malignancies-of-childhood-the-unos-experience
#4
Emma C Hamilton, Julius Balogh, Duc T Nguyen, Edward A Graviss, Andras A Heczey, Mary T Austin
BACKGROUND/PURPOSE: The purpose of this study was to determine factors associated with patient and graft survival following orthotopic liver transplantation (OLT) in children and adolescents with primary hepatic malignancies. METHODS: The United Network for Organ Sharing (UNOS) database was queried for all patients <18years old who received an OLT with a primary malignant liver tumor between 1987 and 2012 (n=544). Five-year patient and graft survival were determined using Kaplan-Meier methodology, and independent predictors of survival were determined using multivariate Cox proportional hazards model...
October 12, 2017: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/29101880/in-situ-observation-of-phase-transformation-in-iron-carbide-nanocrystals
#5
Le Thanh Cuong, Nguyen Duc Dung, Ta Quoc Tuan, Nguyen Thi Khoi, Pham Thanh Huy, Ngo Ngoc Ha
This paper reports on the in situ observation of phase transformation in an iron carbide nanocrystal encapsulated in a graphitic shell by means of high resolution transmission electron microscopy (HR-TEM). A Fe7C3 nanocrystal in orthorhombic (o-Fe7C3) structure with carbon graphitic cover is captured at the initial time of the experiment. Under the projection of a high-energy electron beam (200kV), the graphitic carbon layer evaporates gradually and structural changes in orthorhombic (o-Fe7C3) crystal manifests simultaneously...
October 31, 2017: Micron: the International Research and Review Journal for Microscopy
https://www.readbyqxmd.com/read/29101817/phytochemical-and-analytical-characterization-of-constituents-in-urceola-rosea-hook-arn-d-j-middleton-leaves
#6
Hieu Nguyen Ngoc, Duc Trong Nghiem, Thi Linh Giang Pham, Hermann Stuppner, Markus Ganzera
In Vietnam and China the leaves of Urceola rosea are widely used as herbal remedy and food. However, in contrast to the plants stem, little information was available on major constituents. In this study, the first in-depth phytochemical investigation of U. rosea leaves is described, which resulted in the isolation of thirteen compounds, mainly flavonoids (kaempferol and quercetin derivatives) and triterpenes. Furthermore, an analytical procedure for the quantification of five major compounds was developed. The HPLC separation was performed on a Synergi MAX-RP column using acetonitrile and 0...
October 28, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/29099171/hollow-few-layer-graphene-based-structures-from-parafilm-waste-for-flexible-transparent-supercapacitors-and-oil-spill-cleanup
#7
Duc Dung Nguyen, Ping-Yen Hsieh, Meng-Ting Tsai, Chi-Young Lee, Nyan-Hwa Tai, Bao Dong To, Duc Tu Vu, Chia Chen Hsu
We report a versatile strategy to exploit parafilm waste as a carbon precursor for fabrication of freestanding, hollow few-layer graphene fiber mesh (HFGM) structures without use of any gaseous carriers/promoters via an annealing route. The freestanding HFGMs possess good mechanical flexibility, tailorable transparency, and high electrical conductivity, consequently qualifying them as promising electrochemical electrodes. Because of the hollow spaces, electrolyte ions can easily access into and contact with interior surfaces of the graphene fibers, accordingly increasing electrode/electrolyte interfacial area...
November 9, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29091589/an-empirical-potential-for-simulating-vacancy-clusters-in-tungsten
#8
Daniel Robert Mason, Duc Nguyen-Manh, Charlotte Becquart
We present an empirical interatomic potential for tungsten, particularly well suited for simulations of vacancy-type defects. We compare energies and structures of vacancy clusters generated with the empirical potential with an extensive new database of values computed using Density Functional Theory, and show that the new potential predicts low-energy defect structures and formation energies with high accuracy. A significant difference to other popular embedded atom empirical potentials for tungsten is the correct prediction of surface energies...
November 1, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/29089034/rapid-diagnosis-of-new-and-relapse-tuberculosis-by-quantification-of-a-circulating-antigen-in-hiv-infected-adults-in-the-greater-houston-metropolitan-area
#9
Jia Fan, Hedong Zhang, Duc T Nguyen, Christopher J Lyon, Charles D Mitchell, Zhen Zhao, Edward A Graviss, Ye Hu
BACKGROUND: HIV-associated immune defects inhibit tuberculosis (TB) diagnosis, promote development of extrapulmonary TB and paucibacillary pulmonary TB cases with atypical radiographic features, and increase TB relapse rates. We therefore assessed the diagnostic performance of a novel assay that directly quantitates serum levels of the Mycobacterium tuberculosis (Mtb) virulence factor 10-kDa culture filtrate protein (CFP-10) to overcome limitations associated with detecting Mtb bacilli in sputum or tissue biopsies...
November 1, 2017: BMC Medicine
https://www.readbyqxmd.com/read/29084220/a-multi-country-study-of-the-economic-burden-of-dengue-fever-vietnam-thailand-and-colombia
#10
Jung-Seok Lee, Vittal Mogasale, Jacqueline K Lim, Mabel Carabali, Kang-Sung Lee, Chukiat Sirivichayakul, Duc Anh Dang, Diana Cristina Palencia-Florez, Thi Hien Anh Nguyen, Arthorn Riewpaiboon, Pornthep Chanthavanich, Luis Villar, Brian A Maskery, Andrew Farlow
BACKGROUND: Dengue fever is a major public health concern in many parts of the tropics and subtropics. The first dengue vaccine has already been licensed in six countries. Given the growing interests in the effective use of the vaccine, it is critical to understand the economic burden of dengue fever to guide decision-makers in setting health policy priorities. METHODS/PRINCIPAL FINDINGS: A standardized cost-of-illness study was conducted in three dengue endemic countries: Vietnam, Thailand, and Colombia...
October 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29079660/dual-mtor-kinases-mln0128-inhibitor-sensitizes-hr-her2-breast-cancer-patient-derived-xenografts-to-trastuzumab-or-fulvestrant
#11
Pei-Yin Hsu, Victoria Shang Wu, Noriko Kanaya, Karineh Petrossian, Hang-Kai Hsu, Duc Nguyen, Daniel Schmolze, Masaya Kai, Chun-Yu Liu, Hannah Lu, Peiguo Chu, Courtney A Vito, Laura Kruper, Joanne Mortimer, Shiuan Chen
PURPOSE: Therapeutic strategies against hormonal receptor-positive (HR+)/HER2+ breast cancers with poor response to trastuzumab need to be optimized. EXPERIMENTAL DESIGN: Two HR+/HER2+ patient-derived xenograft (PDX) models named as COH-SC1 and COH-SC31 were established to explore targeted therapies for HER2+ breast cancers. RNA sequencing and RPPA (reverse phase protein array) analyses were conducted to decipher molecular features of the two PDXs and define the therapeutic strategy of interest, validated by in vivo drug efficacy examination and in vitro cell proliferation analysis...
October 27, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/29068155/longitudinal-assessment-of-t-cell-inhibitory-receptors-in-liver-transplant-recipients-and-their-association-with-post-transplant-infections
#12
Krupa R Mysore, Rafik M Ghobrial, Sunil Kannanganat, Laurie J Minze, Edward A Graviss, Duc T Nguyen, Katherine K Perez, Xian C Li
Current immunosuppression regimens in organ transplantation primarily inhibit T cells. However, T cells are also critical in protective immunity, especially in immune compromised patients. In this study, we examined the association of T cell dysfunction, as marked by expression of T cell exhaustion molecules, and post-transplant infections in a cohort of liver transplant patients. We focused on Programmed Death 1(PD-1) and T-cell Ig-and mucin-domain molecule3 (Tim-3) which are potent co-inhibitory receptors, and their persistent expression often leads to T cell dysfunction and compromised protective immunity...
October 25, 2017: American Journal of Transplantation
https://www.readbyqxmd.com/read/29057821/the-dynamic-response-and-vibration-of-functionally-graded-carbon-nanotube-reinforced-composite-fg-cntrc-truncated-conical-shells-resting-on-elastic-foundations
#13
Duc Nguyen Dinh, Pham Dinh Nguyen
Based on the classical shell theory, the linear dynamic response of functionally graded carbon nanotube-reinforced composite (FG-CNTRC) truncated conical shells resting on elastic foundations subjected to dynamic loads is presented. The truncated conical shells are reinforced by single-walled carbon nanotubes (SWCNTs) that vary according to the linear functions of the shell thickness. The motion equations are solved by the Galerkin method and the fourth-order Runge-Kutta method. In numerical results, the influences of geometrical parameters, elastic foundations, natural frequency parameters, and nanotube volume fraction of FG-CNTRC truncated conical shells are investigated...
October 18, 2017: Materials
https://www.readbyqxmd.com/read/29049549/transapical-cardioscopic-mitral-annuloplasty-a-short-term-survival-study-in-a-porcine-model
#14
Thang Duc Vu, Min Zin Oo, Duc-Viet Nguyen, Ervin Marquez Ocampo, Yilin Ong, Suganya Cheyyatraivendran-Arularasu, Lian-Kah Ti, Mark A Richards, Theo Kofidis
OBJECTIVES: The transapical approach provides concurrent surgical access to the mitral and the aortic valves, the root of the aorta and the left atrium. We previously showed the feasibility of transapical cardioscopic (TAC) surgery in a non-survival porcine model. However, reproducibility and feasibility of ring implantation using TAC have not been reported. Therefore, in this study, we hypothesized that implantation of a mitral annuloplasty ring can be feasibly and safely carried out endoscopically via the apex of the heart...
August 30, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/29049400/spoligotyping-and-whole-genome-sequencing-analysis-of-lineage-1-strains-of-mycobacterium-tuberculosis-in-da-nang-vietnam
#15
Minako Hijikata, Naoto Keicho, Le Van Duc, Shinji Maeda, Nguyen Thi Le Hang, Ikumi Matsushita, Seiya Kato
BACKGROUND: Spacer oligonucleotide typing (spoligotyping), a widely used, classical genotyping method for Mycobacterium tuberculosis complex (MTBC), is a PCR-based dot-blot hybridization technique to detect the genetic diversity of the direct repeat (DR) region. Of the seven major MTBC lineages in the world, lineage 1 (Indo-Oceanic) mostly corresponds to the East African-Indian (EAI) spoligotype family in East Africa and Southeast Asia. OBJECTIVES: We investigated the genomic features of Vietnamese lineage 1 strains, comparing spoligotype patterns using whole-genome sequencing (WGS) data...
2017: PloS One
https://www.readbyqxmd.com/read/29039287/strongyloides-stercoralis-seroprevalence-in-vietnam
#16
Nguyen Thi Ngoc Diep, Pham Quang Thai, Nghiem Nguyen Minh Trang, Julia Jäger, Annette Fox, Peter Horby, Hoang Vu Mai Phuong, Dang Duc Anh, LE Thi Quynh Mai, H Rogier VAN Doorn, Behzad Nadjm
Strongyloidiasis is a neglected tropical disease caused by the roundworm Strongyloides stercoralis affecting 30-100 million people worldwide. Many Southeast-Asian countries report a high prevalence of S. stercoralis infection, but there are little data from Vietnam. Here, we evaluated the seroprevalence of S. stercoralis related to geography, sex and age in Vietnam through serological testing of anonymized sera. Sera (n = 1710, 1340 adults and 270 children) from an anonymized age-stratified serum bank from four regions in Vietnam between 2012 and 2013 were tested using a commercial Strongyloides ratti immunoglobulin G ELISA...
October 17, 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/29030958/association-of-meox2-polymorphism-with-nonsyndromic-cleft-palate-only-in-a-vietnamese-population
#17
Duy Le Tran, Hideto Imura, Akihiro Mori, Satoshi Suzuki, Teruyuki Niimi, Maya Ono, Chisato Sakuma, Shinichi Nakahara, Tham Thi Hong Nguyen, Phuong Thi Pham, Viet Hoang, Van Thi Tuyet Tran, Minh Duc Nguyen, Nagato Natsume
To evaluate the association between the single nucleotide polymorphism (SNP) rs227493 in the MEOX2 gene and nonsyndromic cleft palate only, this research was conducted as a case-control study by comparing a nonsyndromic cleft palate only group with an independent, healthy, and unaffected control group who were both examined by specialists. Based on clinical examination and medical records, we analyzed a total of 570 DNA samples, including 277 cases and 293 controls, which were extracted from dry blood spot samples collected from both the Odonto and Maxillofacial Hospital in Ho Chi Minh City and Nguyen Dinh Chieu Hospital in Ben Tre province respectively...
October 14, 2017: Congenital Anomalies
https://www.readbyqxmd.com/read/29030137/video-directly-observed-therapy-to-support-adherence-with-treatment-for-tuberculosis-in-vietnam-a-prospective-cohort-study
#18
Thu Anh Nguyen, Minh Tam Pham, Thi Loi Nguyen, Viet Nhung Nguyen, Duc Cuong Pham, Binh Hoa Nguyen, Greg James Fox
BACKGROUND: Ensuring patients fully adhere to their treatment is a major challenge for TB control programmes in resource-limited settings. This study was conducted three outpatient tuberculosis clinics in Hanoi, Vietnam. We aimed to evaluate the feasibility of using asynchronous Video Directly Observed Therapy (VDOT) to support treatment adherence among patients with bacteriologically confirmed pulmonary tuberculosis. METHODS: In this cohort study, consecutive adult patients with bacteriologically confirmed pulmonary TB were invited to enroll in a programme of VDOT...
October 10, 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/29029055/prognostic-models-for-9-month-mortality-in-tuberculous-meningitis
#19
Le Thi Phuong Thao, A Dorothee Heemskerk, Ronald B Geskus, Nguyen Thi Hoang Mai, Dang Thi Minh Ha, Tran Thi Hong Chau, Nguyen Hoan Phu, Nguyen Van Vinh Chau, Maxine Caws, Nguyen Huu Lan, Do Dang Anh Thu, Nguyen Thuy Thuong Thuong, Jeremy Day, Jeremy J Farrar, M Estee Torok, Nguyen Duc Bang, Guy E Thwaites, Marcel Wolbers
Background: Tuberculous meningitis (TBM) is the most severe form of extra-pulmonary tuberculosis. We developed and validated prognostic models for 9-month mortality in HIV-uninfected and HIV-infected adults with TBM. Methods: We included 1699 subjects from four randomized clinical trials and one prospective observational study conducted at two major referral hospitals in Southern Vietnam from 2001-2015. Modelling was based on multivariable Cox proportional hazards regression...
September 26, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29018250/molecular-analysis-of-pyrazinamide-resistance-in-mycobacterium-tuberculosis-in-vietnam-highlights-the-high-rate-of-pyrazinamide-resistance-associated-mutations-in-clinical-isolates
#20
Nguyen Quang Huy, Contamin Lucie, Tran Thi Thanh Hoa, Nguyen Van Hung, Nguyen Thi Ngoc Lan, Nguyen Thai Son, Nguyen Viet Nhung, Dang Duc Anh, Bañuls Anne-Laure, Nguyen Thi Van Anh
Pyrazinamide (PZA) is a key antibiotic in current anti-tuberculosis regimens. Although the WHO has stressed the urgent need to obtain data on PZA resistance, in high tuberculosis burden countries, little is known about the level of PZA resistance, the genetic basis of such resistance or its link with Mycobacterium tuberculosis families. In this context, this study assessed PZA resistance through the molecular analysis of 260 Vietnamese M. tuberculosis isolates. First-line drug susceptibility testing, pncA gene sequencing, spoligotyping and mycobacterial interspersed repetitive units-variable number of tandem repeats (MIRU-VNTR) typing were performed...
October 11, 2017: Emerging Microbes & Infections
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