Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "Xuan, Tien Le" wg kryterium: Autor

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-6 z 6
    Tytuł:
    Response surface methodology for optimization studies of hydro-distillation of essential oil from pixie mandarin (Citrus reticulata Blanco) peels
    Autorzy:
    Tan, Phat Dao
    Ngo, Thi Cam Quyen
    Tran, Thi Yen Nhi
    Chi, Cuong Nguyen
    Trung, Thanh Nguyen
    Xuan, Tien Le
    Powiązania:
    https://bibliotekanauki.pl/articles/2081508.pdf
    Data publikacji:
    2021
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    Hydro-distillation
    pixie mandarin oil (Citrus reticulata Blanco)
    RSM
    GC-MS
    Opis:
    Essential oil extraction technique from mandarin pixie peels by hydro-distillation is optimized by respon-se surface methodology (RSM). Mathematical techniques were used in experimental design to evaluate the impacts of factors that affect the extraction process and improve the yield of the extraction process. A central mixed design based on infl uencing variables such as water ratio (3–5 mL/g), temperature (110–130° C) and extraction time (90–150 min) was adopted with essential oil yield as the target func-tion. Correlation analysis of the mathematical regression model showed that the quadratic polynomial model can be used to optimize hydro-distillation of pixie mandarin oil. The results showed that under the optimum extraction conditions, the highest quantity of essential oils was achieved (7.28 mL/100 g materials). In terms of statistical analysis, the signifi cance levels (p-value <0.05) of the model showed that the experimental results had a good impact between factors. The coeffi cient of determination indicating the match between the experimental value and the predicted value of the model was high (R2>0.9). The chemical composition of the essential oil was analyzed by Gas Chromatography-Mass Spectrometry, revealing the dominance of limonene content (97.667%), which implies that the essential oil of pixie mandarin could be an alternative source of limonene.
    Źródło:
    Polish Journal of Chemical Technology; 2021, 23, 4; 26-34
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Status and prospects of underground coal mining technology in Vietnam
    Stan i perspektywy technologii podziemnego wydobycia węgla w Wietnamie
    Autorzy:
    Le, Tien Dung
    Bui, Xuan‑Nam
    Powiązania:
    https://bibliotekanauki.pl/articles/318706.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Przeróbki Kopalin
    Tematy:
    górnictwo podziemne
    Wietnam
    technologia
    underground coal mining
    Vietnam
    technology
    Opis:
    Underground coal mining in Vietnam plays an important role to not only the sustainable coal industry but also the energy and social security in this country. Although the Vietnam coal industry has produced 35–45 million tonnes of raw coal per annum in past ten years, a great volume of coal resources remains distributed in complex geo-mining conditions and mostly unmined. This paper presents a brief review of the current and potential technologies for cutting coal and controlling roof in Vietnam underground coal mines. From the review, it is concluded that there is an urgent demand on improvement of current technologies as well as on investigation for effective application of more advanced mining methods into the industry, especially for deep mining at Red River Delta—the largest coal basin in Vietnam.
    Źródło:
    Inżynieria Mineralna; 2019, 21, 2/2; 105-111
    1640-4920
    Pojawia się w:
    Inżynieria Mineralna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Isolation of citronellal and geraniol from citronella (Cymbopogon winterianus) oil by vacuum fractional distillation: Effect of operating conditions on the separation
    Autorzy:
    Le, Minh-Trung
    Vu, Duc-Phuong
    Nguyen, Thanh Ngoc
    Le, Xuan-Tien
    Powiązania:
    https://bibliotekanauki.pl/articles/27315670.pdf
    Data publikacji:
    2023
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    citronellal
    geraniol
    vacuum
    fractional distillation
    citronella oil
    Opis:
    This study used fractional distillation to separate citronellal and geraniol from citronella (Cymbopogon winterianus) essential oil to improve their market value. The one-factor-at-a-time methodology investigated operating parameters’ optimum conditions and effects, including system pressure, packing types, and column height. All investigations were evaluated based on their main fraction’s citronellal and geraniol content and recovery. Regarding the effect of the variables, a higher system pressure improved the separation while increasing the temperature range of each fraction and distillation time. The packing types would also improve the separation by providing a large surface area. Finally, the column height also positively impacted the separation. In the optimum citronella oil fractionation, citronellal content experienced a 2.5-fold increase, from 37.68% to 94.33%. Geraniol purity reached 40.61% from an initial content of 17.33% in the raw CW oil. The distillation could recover up to 90.00% of citronellal and 68.18% of geraniol.
    Źródło:
    Polish Journal of Chemical Technology; 2023, 25, 4; 67--80
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The influence of spontaneously generated coherence and phase of laser fields on optical bistability in a three-level atomic medium: an analytical approach
    Autorzy:
    Van, Doai Le
    Minh, Phuong Le Thi
    Tien, Dung Nguyen
    Xuan, Khoa Dinh
    Huy, Bang Nguyen
    Powiązania:
    https://bibliotekanauki.pl/articles/174730.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    optical bistability
    electromagnetically induced transparency
    spontaneously generated coherence
    Opis:
    The influence of spontaneously generated coherence and relative phase of laser fields on optical bistability in a three-level atomic medium under electromagnetically induced transparency was studied by using a density matrix theory. An input-output intensity relation of a probe laser field is derived as an analytical function of parameters of a controlling light field, the relative phase, and the spontaneously generated coherence. This function can be fitted with experimental values to be a semi-empirical model which is helpful for finding related applications. It is shown that thresholds and width of the optical bistability hysteresis loop can be manipulated with the controllable parameters. On the other hand, the influence of population relaxation between two ground hyperfine levels on the optical bistability behavior is significant for small coupling field intensity.
    Źródło:
    Optica Applicata; 2019, 49, 3; 509-522
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Radon-Radium Thermal Mineral Water in Vo Am Ecotourism Project Area, Ngoc Luong Commune, Yen Thuy District, Hoa Binh Province, Vietnam
    Autorzy:
    Ban, To Xuan
    Dung, Le Tien
    Duc, Tran Van
    Trong, Nguyen Huu
    Tuan, Truong Duc
    Powiązania:
    https://bibliotekanauki.pl/articles/27323255.pdf
    Data publikacji:
    2023
    Wydawca:
    Polskie Towarzystwo Przeróbki Kopalin
    Tematy:
    thermal mineral water
    Ngoc Luong
    Hoa Binh
    Vietnam
    wody termalne
    wody mineralne
    Wietnam
    Opis:
    Ngoc Luong thermal mineral water at Vo Am ecotoursim, Ngoc Luong commnune, Yen Thuy district, Hoa Binh province, northern Vietnam. The thermal mineral water source is at karstic-fractured limstones of Dong Giao Formation aged Anisi. Methods used in this study conists of basic field survey of hydrogeology, resistivity, borehole drilling, pumping tests, and thermal mineral water sample analysis. The thermal mineral water is classified as radon-radium, low mineralised thermal mineral water. The water source is originally related to the deep Moc Chau-Tam Diep Fault directing northwest-southeastward. Its exploration reserve is estimated at 1,497 m3/d with good quality, sastifying all national criterals for the use of domestic supply, bathing, and medical treatment. This is one of ten rare thermal-mineral water sources in Vietnam, containing radon and radium. It is thefore necessary to have good management to ensure the thermal-mineral water to be effectively exploited, used, and protected.
    Źródło:
    Inżynieria Mineralna; 2023, 2; 327--333
    1640-4920
    Pojawia się w:
    Inżynieria Mineralna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improvement in extraction and sensory properties of soapnut extract by fermentation
    Autorzy:
    Le, Xuan-Tien
    Tran-Thi, Tuong-An
    Phuong, Kieu-Trang
    Nguyen-Kim, Minh-Tam
    Dao, Tan Phat
    Powiązania:
    https://bibliotekanauki.pl/articles/27315636.pdf
    Data publikacji:
    2023
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    Saponin
    Sapindus mukorossi
    fermentation
    Saccharomyces cerevisiae
    Opis:
    Sapindus saponins are potential biosurfactants that can widely be used to replace many chemical cleaning products. This study aimed to investigate the water extraction of saponins from the pericarps of Sapindus mukorossi and enhance the sensory properties of the extract by yeast fermentation. Extraction conditions including temperature, solid-to-liquid ratio, extraction time, and number of extraction times were studied. A yield of 21.4% was obtained by 2 h of extraction at 80 °C with a solid-to-liquid of 1/6 (w/v) and two times. Fermentation was used to purify the Sapindus extract, inoculum amount and fermentation time were optimized. The fermentation by S. cerevisiae (2%) within 4 days significantly improved the color and smell of aqueous extract, turbidity decreased by 75.6%, total sugar content decreased by nearly 50% and saponins content slightly decreased. These results could contribute to the development of industrial–scale production of Sapindus saponins.
    Źródło:
    Polish Journal of Chemical Technology; 2023, 25, 2; 1--7
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies