HCMUS - Danh sách bài trích tạp chí (The List of Article) (91)

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Item 1 - 20 [/91]

  • Authors: Ton, That Huu Dat; Phung, Thi Thuy Oanh (2021-09)

    Mangrove is one of the highly productive ecosystems and contains diverse plants and microbial communities. Bacterial endophytes from mangroves are considered as a prolific source of biological molecules with important functions in the protection of mangrove plants against herbivores, insects as well as pathogens. The present study aimed to isolate endophytic bacteria from the roots of mangrove plant Rhizophora stylosa and to screen antioxidant, α-amylase and α- glucosidase inhibitory activities of ethyl acetate extracts from the isolated endophytic bacteria. A total of 73 endophytic bacterial strains from R. stylosa roots were isolated, of which ethyl acetate extracts of 10 isolated e...
  • Authors: Doan, Thi Nhung; Bui, Van Ngoc (2021-09)

    Coral reefs harbor the extraordinary biodiversity and not only provide livelihoods for coastal communities but also play a crucial role in economic development generally. Unfortunately, they are in decline in Vietnam and around the world because mass coral bleaching events have become more common worldwide. However, little is discovered, about viruses that infect corals and their symbionts. Herein, we present metagenomic analyses of the viral communities in coral mucus associated with healthy and bleached coral Acropora formosa which was collected at Con Dao Island, Vietnam. Interestingly, the number of viral species in bleached specimens are higher than those in healthy status. Virus...
  • Authors: Do, Van Nhuong; Tran, Duc Hau; Nguyen, Duc Hung; Tran, Nam Hai (2021-09)

    Mangroves are a diverse and rich ecosystem, in which many animals are associated, including benthos. Species composition and occurrence of these animals are driven by the mangroves and tidal conditions. To examine how the benthic animal is distributed in mangrove habitats from northern Vietnam, two surveys in 2019 were conducted in Tien Hai Wetland Nature Reserve, which resulted in a total of 89 species, belonging to 56 genera and 35 families of zoobenthos. This is the first publication of these animals in the study site. The two major groups of benthic animals in the ecosystem were Crustacea and Mollusca, which occupy 54.02% and 36.78% of the total species, respectively. There are se...
  • Authors: Nguyen, Tran Dong Phuong; Mai, The Sang (2021-09)

    In recent years, studies have been carried on the selection and breeding of melon to reduce its production cost. The F1 seeds of this species are usually created by parental lines. Notably, the parental lines are separated from each other to secure the breeding materials. However, there are no studies on establishing suitable conditions for storing pollen grains of Japanese melon Cucumis melo L. In this study, pollen grains of C. melo were dried at 38 oC temperature, for 1.5 hours, which served as the raw materials. After storage in acetone at 5 oC for 3, 5, 7 days, or in liquid nitrogen for 5 days, pollen grains were stained with triphenyl tetrazolium chloride (TTC) to evaluate their...
  • Authors: Tran, Huu Dinh; Dinh, Thanh Thao; Luong, Thi Lan Anh; Nong, Van Hai; Nguyen, Thuy Duong (2021-09)

    Reproductive impairment in men is a multifactorial disease and is currently considered a global health issue. Previous studies have investigated the correlation between genetic variants and male infertility in different populations. However, such studies have appeared in limited amounts in the Vietnamese population. This study aimed to assess the association of polymorphisms FSIP2 rs4666689 and PON2 rs7493 with male infertile susceptibility in the Vietnamese population. Total DNAs were isolated from 376 samples, including 175 males with infertility and 201 controls having at least one child. For FSIP2 rs4666689, all 376 samples were applied for genotyping using polymerase chain reacti...
  • Authors: Vo, Thi Phuong; Nguyen, Du Sanh (2021-09)

    In this study, the growth and development of Eleocharis ochrostachys were investigated in a control condition. Its tubers of the plant sprouted to produce stems after being cultured in plastic pots for several days. After 120 days, the plant grew to a height of 42.8 cm on average, stem diameters were from 1.5 to 2.0 mm, and the plant started to bloom and produce tubers. The plant spikelet had dimensions of 1.0–2.0 cm high, 2.0–2.5 mm wide after 120 days. The achenes were formed after 128–130 days, had dimensions of 1.15–1.20 mm long, and 0.5–0.7 mm wide when the plant was cultured for 150 days. The tubers had dimensions of 7.0–9.0 mm long, 4.0–6.0 mm diameter, and were about 0.06–0.1 ...
  • Authors: Do, Minh Trung; Do, Hai Quynh; Nguyen, Thuy Duong (2021-09)

    Prodigiosin (Pg), a secondary metabolite with anticancer and antimicrobial activities, can be produced in Serratia marcescens bacteria through the condensation reaction of 4-methoxy-2, 2’- bipyrrole-5-carboxyaldehyde (MBC) and 2-methyl-3-amylpyrrole (MAP). Among these, the MBC synthetic pathway is started by the conversion of L-proline to L-proline-AMP before this complex is covalently attached to PigG. This reaction is catalyzed by an L-prolyl-AMP ligase named PigI. Therefore, PigI protein plays an important role in the prodigiosin biosynthetic pathway. However, studies related to PigI protein have not been carried out in Vietnam yet. In this work, the pigI gene was cloned and expre...
  • Authors: Huynh, Thi Thu Hue; Nguyen, Minh Phuong; Nguyen, Xuan Canh (2021-09)

    Two species of genus Pueraria ((Pueraria lobata (synonym: Pueraria montana var. lobata) and Pueraria mirifica (synonym: Pueraria candollei var. mirifica)) are traditional plants used in medicine since ancient times. These plants have been used and became commercially crucial indigenous medicinal plants. Currently, both roots and flowers of P. mirifica are used as a dietary supplement and functional food for women because of their rich source of phytoestrogen and nutrition. However, little information of genes on both species of Pueraria genus (P. lobata and P. mirifica) are known in Vietnam. The purpose of this research is to support more understanding about Chalcone synthase (CHS) g...
  • Authors: Nguyen, Van Tu; Le, Thi Trang; Tran, Thi Phuong Thao (2021-09)

    The study investigated the Phaeophyceae during the year 2019 at sixteen sampling sites representative for Cham islands. Specimens were collected by scuba diving, snorkelling and walking at the upper tidal zone in both dry and rainy seasons. Twenty-five species of the Phaeophyceae identified for Cham islands from four orders, four families and eleven genera. The Sargassaceae family is the most abundant species composition, followed by Dictyotaceae, Scytosiphonaceae and Asteronemataceae family. In the six islands surveyed, Hon Lao has the highest diversity with 19 species recorded; Hon Dai, Hon Tai, Hon Kho and Hon Mo island recorded from 10 to 14 species, and the lowest diversity is a...
  • Authors: Pham, Viet Cuong; Nguyen, Phuong Hoa (2021-09)

    The bacteria capable of fixing atmospheric nitrogen were isolated from cassava cultivated soils of Vietnam. The potential isolates were identified by analyzing the 16S rRNA gene and by morphological, biochemical, cultural characteristics. The selected isolates were assigned to the species Bacillus sp. DQT2 M17, Bacillus subtilis DTAN6 M17, and Bacillus megaterium DSH I8. The effect of culture conditions on the nitrogen-fixing activity of three selected isolates were studied and the obtained results showed that the highest amount of accumulated ammonia was detected after 6 days of incubation at 35 oC, pH 7.0 with sucrose as a carbon source. The selected strains could be exploited as in...
  • Authors: Phan, Thi Kieu Trang; Nguyen, Thanh Duong; Nguyen, Huy Hoang (2021-09)

    In clinical practice the number of urothelial cells collected by biopsy are limited and the procedure requires general anaesthesia. Therefore, in order to acquire enough urothelial cells for in vitro engineering of the urothelium, in this research we aim to isolate urothelial cells from human urine by an alternative, effective, low-cost and safe technique rather than using the indicated method. Sixty human urine samples had been collected from patients and volunteers, cells then were precipitated by centrifugation and cultured. Following the isolation process, these cells were characterized by the immunocytochemical method using some specific antibodies. There are 2 types of cells we...
  • Authors: Nguyen, Thi Ngoc Nhi; Tran, Nhan Dung (2021-09)

    Termitomyces clypeatus is a fungus species, which has been used as food and medicinal mushroom. In the current study, submersed fermentation of the fungus in a stirred-tank bioreactor was determined for its culture biomass and nutrient contents. T. clypeatus obtained its highest biomass after from 13 to 15 days of cultivation, when the dry biomass of its mycelium system was more than 6%. Agitation speeds of 150 or 180 rpm were the most suitable for the fungus. The determination of chemical compositions showed that the dry biomass of its mycelium system had high protein content, with 57.8% on its dry-weight basis. Besides, 11 types of amino acids higher than 0.1% of wet weight culture ...
  • Authors: Nguyen, Thi Phuong Trang (2021-09)

    Berberidaceae contains 17 genera and nearly 650 species, in which the genus Berberis and the genus Mahonia are sisters with a very close relationship and share many similar characteristics. In the past, the two genera were merged into the genus Berberis. At present, the Berberidaceae is at risk and is prioritized for conservation, especially the species of Mahonia and Berberis. In the fact, identification for the Berberidaceae species based on the morphology of parts for sale (such as roots, stems, leaves) without reproductive organs (flowers and fruits) is impossible. In recent years, molecular biology techniques are being applied widely and effectively in research on the evolution, ...
  • Authors: Vu, Dinh Thong; Pham, Van Nha; Pham, Duc Tien; Nguyen, Thanh Luong; Nguyen, Xuan Dang (2021-06)

    Cat Ba National Park is the core zone of the Cat Ba Archipelago Biosphere Reserve. It contains quite diverse and unique ecosystems including 776 ha of mangrove forest. Although bats of the park were included in many publications, none were recorded from the mangrove ecosystem. We recently conducted field surveys through the wetland areas of the park and recorded three horseshoe bat species: Marshall's horseshoe bat (Rhinolophus marshalli), Pearson’s horseshoe bat (Rhinolophus pearsonii), and the least horseshoe bat (R. pusillus). Of these, R. pearsonii is the most common species. We here provide morpholocal and acoustic features of each species with notes on the importance of the mang...
  • Authors: vu, Dinh Thong (2021-06)

    Dam Nai is one of the twelve best known lagoons in south central Vietnam. Habitats in and around the largoon and its surroundings are quite diverse including mangrove, bushes, rice fields and fruit tree farms which are ecologically suitable for many animals including bats. However, bats in this area still receives very little attention from scientists. The author conducted a series of bat surveys since 2017 for the primary understanding of bats inhabiting this area before the establishment of a wind farm. The results show the records of two nationally rare fruit bat species, Cynopterus brachyotis and Macroglossus minimus, from mangrove in this area. Morphological features and detailed...
  • Authors: Vo, Thanh Trung; Tran, Van Huynh; Tran, Mai Duc; Le, Trong Nghia; Pham, Duc Hung (2021-06)

    Betaphycus gelatinus (Esper) Doty (BG) is a red seaweed that has been used as a food and a research material. Thus, the study on factors affecting the growth and development of BG is necessary. The present results show that the good growth conditions of BG are 27 oC, 30‰ of salinity, and add PES or Nitrate-phosphate medium. This research has important scientific significance in preserving and restoring rare and valuable commercial seaweed varieties.
  • Authors: Nguyen, Van Phuong; Trinh, Dinh Duy; Trinh, Dinh Duy; Tran, Le Nam Khanh; Do, Doan Thu Giang; Ta, Thi Thuy Linh; Mai, Thi Phuong Nga; To, Thi Mai Huong; Mai, Duc Chung; Chu, Hoang Ha; Le, Tran Binh (2021-06)

    Endophytic bacteria (EB) possess different beneficial traits. Endophytic microbes are often functional in that they may carry nutrients from the soil into plants, modulate plant development, increase stress tolerance of plants, suppress virulence in pathogens, increase disease resistance in plants, and suppress development of competitor plant species. They may enhance plant development by carrying nutrients from the soil into plants and protect plants against phytopathogens by synthesizing extra-/intracellular proteolytic enzymes, as well as releasing antimicrobial metabolites and competing with pathogens for habitation and nutrients. In this study, we investigated the ability to prod...
  • Authors: Tran, Xuan Thach; Bui, Thi Thuy Duong; Le, Van Truong; Nguyen, Thi Hoa; Pham, Thi Lanh; Nguyen, Thai Uy; Le, Quynh Mai; Dang, Duc Anh; Dinh, Duy Khang; Dong, Van Quyen (2021-06)

    The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is the causative agent of a pandemic of acute respiratory disease in humans. This pandemic has now spread worldwide and caused more than 2,000,000 deaths by 15 January 2021. The complexity and the ongoing pandemic of coronavirus SARS-CoV-2 make it difficult to control the disease. Sequence analysis on some open reading frames (ORFs) of a SARS-CoV-2 virus strain isolated in Vietnam in February 2020 (SARS-CoV-2/NIHE/human/2020/VIE strain) revealed some single nucleotide polymorphisms (SNPs) that only appeared in the Vietnamese strain in comparison to those of the isolates in other countries, including: (1) a change in ORF...
  • Authors: Le, Thi Thom; Hoang, Thi Minh Hien; Ngo, Thi Hoai Thu; Luu, Thi Tam; Nguyen, Cam Ha; Dang, Diem Hong (2021-06)

    Thraustochytrium is a heterotrophic marine microalgae genus belonging to the Labyrinthula class, Thraustochytriaceae (Thraustochytrids) family. Recently, studied results have showed that some species/strains of Thraustochytrium genus are potential candidates to produce biomass rich in lipid containing high polyunsaturated fatty acid (PUFAs), especially docosahexaenoic (DHA C22: 6 ω-3), carotenoid, extracellular polysaccharides (EPSs) and enzymes which play a crucial role in human health. Therefore, throughout many decades, numerous studies have been conducted in exploiting bioactive compounds, especially PUFAs. Biomass and PUFAs yield of some strains Thraustochytrium spp. depend on en...
  • Authors: Pham, Viet Cuong; Tran, Thi Hong (2021-06)

    Currently, searching for new protease inhibitors is of interest to many scientists around the world because they play an important role in controlling harmful proteases. As terrestrial bioactive resources are becoming increasingly depleted, studies are aimed at finding other sources, for example, the ocean. Some recent reports indicate that sponge- associated microbes produce substances with high biological activity, such as anticancer and anti-inflammation, protease inhibition, etc. In this report, a new serpin gene screened from the metagenomics database of microorganism-associated Spheciospongia vesparium QT2 collected sea of Quang Tri province (Vietnam), was successful expressed i...