Neuroprotective Metabolites from Vietnamese Marine Derived Fungi of Aspergillus and Penicillium Genera     

Elena V. Girich  Anton N. Yurchenko  Olga F. Smetanina  Phan Thi Hoai Trinh  Ngo Thi Duy Ngoc  Mikhail V. Pivkin  Roman S. Popov  Evgeny A. Pislyagin  Ekaterina S. Menchinskaya  Ekaterina A. Chingizova  Shamil S. Afiyatullov  Ekaterina A. Yurchenko 《Marine drugs》2020,18(12)

Low molecular weight secondary metabolites of marine fungi Aspergillus flocculosus, Aspergillus terreus and Penicillium sp. from Van Phong and Nha Trang Bays (Vietnam) were studied and a number of polyketides, bis-indole quinones and terpenoids were isolated. The structures of the isolated compounds were determined by 1D and 2D NMR and HR-ESI-MS techniques. Stereochemistry of some compounds was established based on ECD data. A chemical structure of asterriquinone F (6) was thoroughly described for the first time. Anthraquinone (13) was firstly obtained from a natural source. Neuroprotective influences of the isolated compounds against 6-OHDA, paraquat and rotenone toxicity were investigated. 4-Hydroxyscytalone (1), 4-hydroxy-6-dehydroxyscytalone (2) and demethylcitreoviranol (3) have shown significant increasing of paraquat- and rotenone-treated Neuro-2a cell viability and anti-ROS activity.  相似文献   

Milk vetch dwarf virus infection in the Solanaceae and Caricaceae families in Southeast Asia     

Aamir Lal  Eui-Joon Kil  Vo T. B. Thuy  Chairina Fadhila  Phuong T. Ho  Hee-Seong Byun  Hang T. Dao  Ji-Kwang Kim  Sukchan Lee 《Plant pathology》2020,69(6):1026-1033

Milk vetch dwarf virus (MDV) is an important member of the genus Nanovirus and is transmitted by the aphid Aphis craccivora. MDV has multiple single-stranded DNA genome components, each approximately 1 kb, and two or three alpha-satellite molecules. It mainly infects plants of the legume family Fabaceae. Recently, papaya (Carica papaya) collected in Yesan, South Korea, displaying symptoms of leaf yellowing and dwarfism, was identified as a new host for MDV. To examine the geographical distribution of MDV, papaya samples with symptoms were harvested in South Korea, Vietnam, and Taiwan in August 2018, along with tomato and pepper samples grown in adjacent fields in Vietnam. The results revealed the presence of MDV not only in papaya but also in pepper and tomato. This MDV infection in members of the Solanaceae family was confirmed by Southern blot hybridization performed using a PCR product of segment S as a probe. Based on sequence analysis of three MDV components (M, S, and C3), we verified the presence of three different isolates of MDV in these three countries and homology between sequences of isolates from papaya and from members of the Solanaceae from Vietnam. Taken together, our results clearly demonstrate MDV infection in Vietnam and Taiwan for the first time and confirm that MDV can infect economically important pepper and tomato.  相似文献   

Effects of Fermentation Conditions Using Lactobacillus plantarum on the Charantin,Stigmasterol Glucoside and β-sitosterol Glucoside Contents of Bitter Gourd (Momordica charantia L.) Juice     

Nguyen  Trang T. T.  Nguyen  Ha V. H. 《Plant foods for human nutrition (Dordrecht, Netherlands)》2020,75(4):656-658

Plant Foods for Human Nutrition - Bitter gourd fruits contain high amounts of charantin, stigmasterol glucoside and β-sitosterol glucoside, which have been shown to provide health benefits for...  相似文献   

Evaluation of smallholder pig production systems in North Vietnam: Pig production management and pig performances   总被引：2，自引：0，他引：2  

U. Lemke  B. Kaufmann  L.T. Thuy  K. Emrich  A. Valle Zrate 《Livestock Science》2006,105(1-3):229-243

This study investigated the productive adaptability of pig breeds under different smallholder production conditions in Vietnam, comparing an indigenous with a Vietnamese improved breed. Fieldwork was conducted in four villages with different remoteness in North Vietnam from 2001 to 2002, in 64 households keeping the improved Mong Cai or indigenous Ban as sow breeds and progeny for fattening. Four visits per farm yielded 234 structured interviews. Reproductive performances were derived from 135 litters. Individual weights of pigs (n = 755) were obtained. Data were analysed by regression, linear and generalised linear, especially loglinear models.

Two distinct pig production systems were identified, that differed in remoteness, market access, resource availability, distribution of pig breeds and pig production intensity. Higher performances of 1.4 and 1.5 litters year^− 1, 8.4 and 8.4 piglets weaned litter^− 1, 66.6 and 93.0 kg piglets weaned sow^− 1 year^− 1, and 136 and 177 g day^− 1 ADG were found in two villages near town with semi-intensive production conditions and a high rate of improved Mong Cai sows and MC and LW × MC offspring in the observed population. Lower performances of 1.1 and 1.1 litters year^− 1, 4.6 and 5.5 piglets weaned litter^− 1, 20.5 and 30.9 kg piglets weaned sow^− 1 year^− 1, and 66 and 85 g day^− 1 ADG were observed in parallel to higher incidences of indigenous Ban pigs away from town under extensive conditions. Total live weight offtake per household per year was higher near town and in one village distant to town. MC and LW × MC remained even under demand-driven conditions below the performance potential reported for improved genotypes. Under resource-driven conditions with a saving-oriented production pattern, the higher-yielding but more demanding Mong Cai might not be an efficient production alternative as a further performance reduction can be assumed. A considerable live weight output was observed under resource-driven conditions and with a higher percentage of crossbred LW × Ban offspring in the population, possibly representing a promising production alternative. Factors influencing the performance expression of pigs, and the suitability of different methods for the assessment of performance parameters on-farm are discussed.  相似文献   

Rapid method to enumerate and isolate soil actinomycetes antagonistic towards rhizobia     

J.J. Panthier  H.G. Diem  Y. Dommergues 《Soil biology & biochemistry》1979,11(4):443-445

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Effects of microsized rice straw on soil clay dispersibility     

Thu T. T. Tran  Trang T. Dao  Van M. Dinh  Trang T. T. Vu  Hue T. Nguyen  Phuong M. Nguyen  Thu H. A. Ngo  Minh N. Nguyen 《European Journal of Soil Science》2022,73(3):e13246

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Reaction of tryptophan with carbohydrates: identification and quantitative determination of novel beta-carboline alkaloids in food   总被引：1，自引：0，他引：1  

Diem S  Herderich M 《Journal of agricultural and food chemistry》2001,49(5):2486-2492

The formation of various carbohydrate-derived beta-carbolines was observed when model reactions of tryptophan with glucose were studied by means of HPLC with diode array detection, as well as by means of HPLC-MS. Isolation of these compounds and subsequent characterization by tandem mass spectrometry and NMR spectroscopy led to the identification of diastereomeric 1-(1,3,4,5-tetrahydroxypent-1-yl)-9H-pyrido[3,4-b]indoles (1a/b), 1-(1,4,5-trihydroxypent-1-yl)-9H-pyrido[3,4-b]indoles (2a/b), and E/Z isomers of 1-(1,5-dihydroxypent-3-en-1-yl)-9H-pyrido[3,4-b]indole (3a/b). HPLC-MS was used to prove the presence of these novel beta-carboline alkaloids in various food samples. In addition, quantitative determination of beta-carbolines 1a, 1b, and 2a/b in numerous products was achieved by means of HPLC with fluorometric detection. Concentrations ranged from 12 to 1922 microg/L for 1a and 1b and from 3 to 644 microg/L for 2a/b. The highest concentrations of all carbohydrate-derived beta-carbolines under study were found in ketchup, soy sauce, and fish sauce.  相似文献   

Main Characteristics of Statistical Data and the Statistical System for Wood and Wood-processing Products in Vietnam     

Phan Sy Hieu  Vu Huong Thuy  Pham Duc Thuan  Le Thanh Van 《Small-Scale Forestry》2011,10(2):185-198

This paper describes the characteristics of data about wood and wood-processing products published in Vietnam. The characteristics include inconsistency of data published by major data sources, lack of necessary data, and irregular publication frequency. Reasons are identified for the existence of the above characteristics of data for the wood and wood-processing industries, including recent changes in the functions of state statistical organizations and unclear concepts of data published. These characteristics create difficulties for researchers and policy-makers working at the Ministry of Agriculture and Rural Development for analysing policies and establishing supply targets for the wood and wood-processing industries in 5-year economic plans. To improve the statistical system, co-operation between state organisations and the information network (e.g. computers and internet connection) requires strengthening.  相似文献   

Impaired immunoproteasome assembly and immune responses in PA28-/- mice     

Preckel T  Fung-Leung WP  Cai Z  Vitiello A  Salter-Cid L  Winqvist O  Wolfe TG  Von Herrath M  Angulo A  Ghazal P  Lee JD  Fourie AM  Wu Y  Pang J  Ngo K  Peterson PA  Früh K  Yang Y 《Science (New York, N.Y.)》1999,286(5447):2162-2165

In vitro PA28 binds and activates proteasomes. It is shown here that mice with a disrupted PA28b gene lack PA28a and PA28b polypeptides, demonstrating that PA28 functions as a hetero-oligomer in vivo. Processing of antigenic epitopes derived from exogenous or endogenous antigens is altered in PA28-/- mice. Cytotoxic T lymphocyte responses are impaired, and assembly of immunoproteasomes is greatly inhibited in mice lacking PA28. These results show that PA28 is necessary for immunoproteasome assembly and is required for efficient antigen processing, thus demonstrating the importance of PA28-mediated proteasome function in immune responses.  相似文献   

Does the definition of the Mediterranean diet need to be updated?     

Serra-Majem L  Trichopoulou A  Ngo de la Cruz J  Cervera P  García Alvarez A  La Vecchia C  Lemtouni A  Trichopoulos D;International Task Force on the Mediterranean Diet 《Public health nutrition》2004,7(7):927-929

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