RESEARCH ON EXERCISES TO DEVELOP PROFESSIONAL PHYSICAL STRENGTH FOR MALE STUDENTS OF VOVINAM TEAM AT HO CHI MINH CITY UNIVERSITY OF SPORTS, VIETNAM

On the basis of synthesizing and analyzing the opinions and knowledge of experts, building exercises to develop professional fitness for male Vovinam students in the HCM City University of Sports team. The research has synthesized 27 exercises to develop strength of mind, including 7 supplementary exercises, 5 arm exercises, 9 leg exercises and 6 continuous exercises to be included in the training program in the 2020-2021 school year. The results after 1 year of the experiment showed that the exercises to develop mental strength for male Vovinam students increased.  Article visualizations

Antioxidant and in vitro antidiabetic activities of Peperomia pellucida (L.) Kunth extract

Peperomia pellucida (L.) is commonly used as a herbal plant. Its effectiveness in treating inflammatory diseases, digestive disorders, and cancer in tropical and subtropical countries was introduced, especially in field of folk medicine. However, this plant species has not been studied widely in Vietnam, especially for its biological activities. This study was done to determine the antioxidant capacity of P. pellucida by using in vitro and in vivo methods, as well as its inhibitory ability to α-amylase enzyme activity. The total polyphenolic and flavonoid contents of P. pellucida extract were reported to be 359.91±0.77 mg GAE/g and 200.28±1.23 mg QE/g extract, respectively. The results showed the in vitro antioxidant activity of P. pellucida extract in four methods, including DPPH, and ABTS.+, RP and TAC, had EC50 values of 730.34 μg/mL, 84.33 μg/mL, 95.28 μg/mL, respectively, and Abs0.5 value of 114.73 μg/mL. Under H2O2-induced oxidative stress, fruit flies that were raised in the feed medium supplemented with a concentration of 1 mg/mL of P. pellucida extract showed their average survival time, 50% survival time, and 10% survival time at 1.6 times, 1.8 times, and 1.62 times, respectively, higher than those of the control treatment. The ability to inhibit the α-amylase activity in P. pellucida extract was determined with an EC50 value of 115.32±2.65 μg/mL compared with the commercial drug of 18.67±0, 01 μg/mL. The research results showed that P. pellucida is a potential species in the study of natural compounds with antioxidant and antidiabetic activities

UV Light Induced Thermoluminescence of Rare Earth doped Nanomaterials Y2_2O3_3:Eu3+^{3+}, Gd2_2O3_3:Eu3+^{3+} and Gd2_2O3_3:Er3+^{3+}

Thermoluminescence  properties of ultraviolet irradiated Y2O3:Eu3+, Gd2O3:Eu3+ and Gd2O3:Er3+ nanophosphors have been reported. The materials were synthesized by gel- combustion method with EDTA- Na2 as organic agent. This method allows production of very fine white powder at low temperature with very high efficiency. XRD has been studied to determine the structure of the prepared nano powders. The obtained materials exhibit sufficient sensibility to UV radiation and may be useful in UV light measurements

Analysis of Antimicrobial Resistance in Non-typhoidal Salmonella Collected From Pork Retail Outlets and Slaughterhouses in Vietnam Using Whole Genome Sequencing.

Non-typhoidal salmonella (TS) remains a significant health burden worldwide. In Vietnam, pork accounts for 70% of the total meat consumed, and contamination with Salmonella is high. High levels of antimicrobial resistance (AMR) have emerged among porcine NTS and of particular concern is the emergence of colistin resistance, a "last defense" antibioic against multi-drug resistant (MDR) Gram-negative pathogens. This study aimed to investigate the antibiotic susceptibility of 69 NTS isolates collected from the pork retail outlets and slaughterhouses in Vietnam during 2014 a nd 2018/19. Phenotypic testing and whole genome sequencing was used to assess the serotype and AMR gene profiles of the 69 NTS isolates. Seventeen different serotypes were identified, of which S. enterica subsp enterica serotype Typhimurium was the most common followed by S. ser. Rissen, S. ser. London, S. ser. Anatum, and S. ser. Derby. Phenotype AMR was common with 41 (59.4%) isolates deemed MDR. MDR strains were most common in slaughterhouses (83%) and supermarkets (75%) and lowest in traditional markets (38%) and convenience stores (40%). Colistin resistance was identified in 18 strains (15 resistant, three intermediate) with mcr-1 identified in seven isolates (S. ser. Meleagridis, S. Rissen, S. Derby) and mcr-3 in two isolates (S. Typhimurium). This includes the first mcr positive S. Meleagridis to our knowledge. Surprisingly, boutique stores had high levels (60%) of MDR isolates including 5/20 isolates with mcr-1. This study demonstrates that pork from modern retail stores classed as supermarkets or boutique (with pork claiming to be high quality, traceable, environmentally friendly marketed toward higher income consumers) still contained NTS with high levels of AMR

The Helicobacter pylori Genome Project : insights into H. pylori population structure from analysis of a worldwide collection of complete genomes

Helicobacter pylori, a dominant member of the gastric microbiota, shares co-evolutionary history with humans. This has led to the development of genetically distinct H. pylori subpopulations associated with the geographic origin of the host and with differential gastric disease risk. Here, we provide insights into H. pylori population structure as a part of the Helicobacter pylori Genome Project (HpGP), a multi-disciplinary initiative aimed at elucidating H. pylori pathogenesis and identifying new therapeutic targets. We collected 1011 well-characterized clinical strains from 50 countries and generated high-quality genome sequences. We analysed core genome diversity and population structure of the HpGP dataset and 255 worldwide reference genomes to outline the ancestral contribution to Eurasian, African, and American populations. We found evidence of substantial contribution of population hpNorthAsia and subpopulation hspUral in Northern European H. pylori. The genomes of H. pylori isolated from northern and southern Indigenous Americans differed in that bacteria isolated in northern Indigenous communities were more similar to North Asian H. pylori while the southern had higher relatedness to hpEastAsia. Notably, we also found a highly clonal yet geographically dispersed North American subpopulation, which is negative for the cag pathogenicity island, and present in 7% of sequenced US genomes. We expect the HpGP dataset and the corresponding strains to become a major asset for H. pylori genomics

Cathodo-, Thermo-, and Photoluminescent Properties of Nano-Y2O3:Eu3+ Fabricated by Controlled Combustion Synthesis

Y2O3:Eu3+ nanophosphors were prepared through combustion reaction under controlled condition of the fuel ethylenediaminetetraacetic acid (EDTA-Na2) and in the temperature range from 350 to 700°C. The products were characterized by X-ray diffraction (XRD), field emission scattering electron microscopy (FESEM), and energy dispersive spectroscopy (EDS). The results showed that Y2O3:Eu3+ nanoparticles were successfully synthesized by combustion method at low temperature and in short reaction time. The light-emitting ability of Y2O3:Eu3+ nanoparticles upon the electron excitation has been studied at the potentials 5, 10, and 15 kV. The thermoluminescent glow curves have elucidated an intense peak at 117°C after UV exposure and at least two peaks at 125 and 336°C with Gamma irradiation. Photoluminescent spectra of Y2O3:Eu3+ nanoparticles exhibited strong red luminescent color with highest sharp band at 612 nm under excitation in ultraviolet at 254, 394 and in visible at 465 nm. The dependence of photoluminescent properties of Y2O3:Eu3+ nanoparticles on annealing temperature and concentration of Eu3+ was also studied

Soursop fruit supply chains: Critical stages impacting fruit quality

Soursop (SSF) is a popular fruit in the southern region of Vietnam. It is a fruit that contains many essential nutrients and antioxidant components, which are good for human health. However, the process of transportation and storage at the stages before reaching the consumer has been greatly affected by natural conditions. In this study, we looked at the impact of each stage in the supply chain on physicochemical and biological quality. 11 indicators were evaluated throughout (Bonded rating, mass loss rate, moisture content, hardness, vitamin C content, total polyphenol content (TPC), total flavonoid content, DPPH• and ABTS+ scavenging activity). The supply process is distributed in 2 popular distributors, markets and supermarkets with supply chain times of 105 h and 197 h respectively. The results have shown that the supply process by supermarket distributors is capable of maintaining better product quality and less variation in physicochemical/bioactive composition. The increase in DPPH• and ABTS+ scavenging activity is proportional to the increase in TPC. Vitamin C is significantly depleted in both supply chains. The research results are a premise for the development of soursop protection solutions at each stage through knowledge of the variations of biologically active substances and physicochemical properties of SSF in the supply chain corresponding to the ripening of SSF. A database that assists suppliers in making the right decisions to prevent quality, and economic losses

Rach Nui: Ground stone technology in coastal Neolithic settlements of southern Vietnam

The discovery of a small portable grinding stone at Rach Nui in southern Vietnam provides significant new insights into regional Neolithic trade networks and ground stone technologies. Previous research held that the manufacture of stone tools took place near stone sources in the interior, along the Dong Nai and Be River basins, but the Rach Nui grinding stone comes from a Neolithic site in the Mekong Delta, approximately 80km to the south-east. This suggests that some manufacturing occurred away from raw material sources. Technological analysis indicates that the artefact was a portable tool for the polishing, maintenance and repair of ground stone adzes. Its discovery at Rach Nui may indicate the presence of specialist tool makers or itinerant traders. This research illustrates the complexity of Neolithic trading networks, and highlights the technological expertise that circulated alongside finished and incomplete object