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Wyszukujesz frazę "Tam, K." wg kryterium: Autor


Wyświetlanie 1-3 z 3
Tytuł:
Diversity, distribution and threats of the Juglandaceae in Vietnam
Autorzy:
Van Sam, H.
Quang Tung, D.
Jasinska, A.K.
Rion, F.
Tuyen, P.T.
Ngoc, D.T.B.
Tam, D.T.
Bétrisey, S.
Song, Y.G.
Kozlowski, G.
Powiązania:
https://bibliotekanauki.pl/articles/2078269.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
Conservation biology
relict trees
Rhoiptelea
Engelhardia
Alfaropsis
Opis:
Vietnam is one of the main centers of generic diversity for Juglandaceae worldwide. In this study, we present for the first time a province-wide distribution of all 3 subfamilies, 7 genera, and 11 Vietnamese species, and give an update on the habitats of all Vietnamese Juglandaceae species, their uses, and current threats. Juglandaceae are found throughout Vietnam. However, most species occur predominantly in the north- ern part of the country between 600 and 1200 m. Some taxa range is found extensively from sea level up to 2,500 meters above sea level. According to the IUCN Red List, Rhoiptelea chiliantha, Carya sinensis, and Pterocarya tonkinensis are threatened while Engelhardia spicata, E. serrata, Alfaropsis roxburghiana, Pterocarya stenoptera are classified as least concerned (Carya tonkinensis is threatened locally, and Engelhardia spicata var. colebrookiana and Platycarya strobilacea merit “threatened” designation in Vietnam’s Red Data Book. The most frequent threats are logging, land-use change, and habitat destruction due to artificial wood planta- tions or road construction. Until now, no conservation measures have been applied for any of the species in Vietnam, although some species occur in national parks. Our study gives an important update on the current diversity and distribution of Juglandaceae in Vietnam. We point out the need for a correct assessment of the threat status of various species on a national and international scale to protect the rarest and most endangered of them. Further research, the use of various forms of protection of individual taxa and/or their habitats, and drawing the attention of an international group of researchers to the urgent need to work together to protect biodiversity in Vietnam hot spots are necessary.
Źródło:
Dendrobiology; 2021, 86; 39-55
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of ursolic acid as the main component isolated from Catharanthus roseus against hyperglycemia
Autorzy:
Thanh Tam, N.
Thien, D.D.
Sung, T.V.
Thi Hoang Anh, N.
Thuy, T.T.
Trung, K.H.
Xuan, T.D.
Khanh, T.D.
Powiązania:
https://bibliotekanauki.pl/articles/10779.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Opis:
Ursolic acid with large amount (0.67% of dried plant weight) along with 7 compounds, namely as spatozoate (1), kaurenoic acid (2), ursonic acid (3), 3-hydroxy-11-ursen-28,13-olide (4), ursolic acid (5), vindoline (6) and mixture of β-sitosterol and stigmasterol were isolated from dichloromethane and ethyl acetate extracts which have shown anti-glucosidase activity of the whole plant of C.roseus. Some isolated compounds and their derivatives were also tested for anti-glucosidase and cytotoxicity.Ursolic acid was examined for hypoglycemic activity in alloxan-induced diabetic mice with dose of 200 and 300 mg/kg/day, respectively. The results have shown that the blood glucose level were reduced by 45.75% and 51.31% to compare with the control group. This study has confirmed that the main component of Vietnamese C. roseus has had significant anti-hyperglycemia activity.
Źródło:
International Letters of Natural Sciences; 2016, 50
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
CERP: a maritime cyber risk decision making tool
Autorzy:
Erstad, E.
Hopcraft, R.
Palbar, J. D.
Tam, K.
Powiązania:
https://bibliotekanauki.pl/articles/24201418.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
maritime cyber resilience
maritime cyber security
cyber risk management
safety and security
emergency response procedures
cyber incident response
risk mitigation
maritime cyber threats
Opis:
An increase in the complexity of systems onboard ships in the last decade has seen a rise in the number of reported maritime cyber-attacks. To tackle this rising risk the International Maritime Organization published high-level requirements for cyber risk management in 2017. These requirements obligate organisations to establish procedures, like incident response plans, to manage cyber-incidents. However, there is currently no standardised framework for this implementation. This paper proposes a Cyber Emergency Response Procedure (CERP), that provides a framework for organisations to better facilitate their crew’s response to a cyber-incident that is considerate of their operational environment. Based on an operations flowchart, the CERP provides a step-by-step procedure that guides a crew’s decision-making process in the face of a cyber-incident. This high-level framework provides a blueprint for organisations to develop their own cyber-incident response procedures that are considerate of operational constraints, existing incident procedures and the complexity of modern maritime systems.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2023, 17, 2; 269--279
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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