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  1. Article ; Online: A revision of the Metaphire peguana species-group (Oligochaeta: Megascolecidae) from Vietnam.

    Nguyen, Tung T / Lam, Dang H / Nguyen, Anh D

    Zootaxa

    2023  Volume 5255, Issue 1, Page(s) 113–135

    Abstract: The Metaphire peguana species-group was revised from the earthworm fauna of Vietnam. As a result, a total of seven species/subspecies have been assigned to this species-gro+up, namely M. peguana peguana (Rosa, 1890), M. peguana laisonensis Nguyen & ... ...

    Abstract The Metaphire peguana species-group was revised from the earthworm fauna of Vietnam. As a result, a total of seven species/subspecies have been assigned to this species-gro+up, namely M. peguana peguana (Rosa, 1890), M. peguana laisonensis Nguyen & Nguyen, 2017, M. bahli (Gates, 1945), M. doiphamon Bantaowong & Panha, 2016, M. dorsomultitheca Nguyen & Nguyen, 2015, M. kiengiangensis Nguyen & Trinh, 2015, and M. nhuongi Nguyen, 2016. The species, M. pacseana (Thai & Samphon, 1988) was removed from the group. The species-group was diagnosed by having spermathecal pores in 6/7/8/9, sometimes 5/6/7/8/9 or 7/8/9; bithecate or polythecate; genital markings paired in 17/18 and 18/19 or in xvii and xix; accessory glands paired, coelomic, strongly covered by muscular-walled bursae; septum 10/11 only present ventrally; and intestinal caeca simple. The K2P genetic distances between the group members varies from 12.9% to 20.7%. The phylogenetic analysis clearly supports the members of this species-group.
    MeSH term(s) Animals ; Oligochaeta/genetics ; Vietnam ; Phylogeny
    Language English
    Publishing date 2023-03-15
    Publishing country New Zealand
    Document type Journal Article
    ISSN 1175-5334
    ISSN (online) 1175-5334
    DOI 10.11646/zootaxa.5255.1.15
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Elemental Sulfur Promoted Cyclization of Aryl Hydrazones and Aryl Isothiocyanates Yielding 2-Imino-1,3,4-thiadiazoles.

    Huynh, Tan N / Ong, Khanh T N / Dinh, Phuong T / Nguyen, Anh T / Nguyen, Tung T

    The Journal of organic chemistry

    2024  Volume 89, Issue 5, Page(s) 3202–3210

    Abstract: We report a method for using elemental sulfur to facilitate the cyclization of aryl hydrazones and aryl isothiocyanates, affording biorelated 2-imino-1,3,4-thiadiazoles. Reactions progressed in the presence of elemental sulfur, ...

    Abstract We report a method for using elemental sulfur to facilitate the cyclization of aryl hydrazones and aryl isothiocyanates, affording biorelated 2-imino-1,3,4-thiadiazoles. Reactions progressed in the presence of elemental sulfur,
    Language English
    Publishing date 2024-02-08
    Publishing country United States
    Document type Journal Article
    ZDB-ID 123490-0
    ISSN 1520-6904 ; 0022-3263
    ISSN (online) 1520-6904
    ISSN 0022-3263
    DOI 10.1021/acs.joc.3c02675
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 4473: Show issues Location:
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    Jg. 1995 - 2021: Lesesall (2.OG)
    ab Jg. 2022: Lesesaal (EG)

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  3. Article ; Online: Two new earthworm species (Annelida, Oligochaeta, Megascolecidae) from the Mekong delta, Vietnam.

    Nguyen, Tung T / Lam, Dang H / Nguyen, Anh D

    Zootaxa

    2022  Volume 5093, Issue 4, Page(s) 483–492

    Abstract: Two new earthworm species are described from the Mekong Delta, Southern Vietnam (An Giang and Ben Tre Provinces), namely Amynthas reductus sp. nov. and Metaphire giengensis sp. nov. The former is recognized by having a pair of spermathecal pores in 6/7, ... ...

    Abstract Two new earthworm species are described from the Mekong Delta, Southern Vietnam (An Giang and Ben Tre Provinces), namely Amynthas reductus sp. nov. and Metaphire giengensis sp. nov. The former is recognized by having a pair of spermathecal pores in 6/7, numerous genital markings in transverse lines in 17/18, and spermatheca with strongly reduced diverticula. The latter is distinguished by having two pairs of spermathecal pores in 5/6/7, two pairs of genital markings located closely to male pores in xviii, and the presence of septum 8/9. The COI fragments are also provided for Metaphire giengensis sp. nov.
    MeSH term(s) Animals ; Male ; Oligochaeta ; Vietnam
    Language English
    Publishing date 2022-01-28
    Publishing country New Zealand
    Document type Journal Article
    ISSN 1175-5334
    ISSN (online) 1175-5334
    DOI 10.11646/zootaxa.5093.4.6
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  4. Article ; Online: Thinking in Bets: The Difficult Airway Algorithm.

    Jones, Justin R / Tsai, Mitchell H / Nguyen, Tung T

    Anesthesia and analgesia

    2022  Volume 135, Issue 4, Page(s) e27–e29

    MeSH term(s) Algorithms ; Intubation, Intratracheal ; Respiratory System ; Thorax
    Language English
    Publishing date 2022-09-15
    Publishing country United States
    Document type Letter
    ZDB-ID 80032-6
    ISSN 1526-7598 ; 0003-2999
    ISSN (online) 1526-7598
    ISSN 0003-2999
    DOI 10.1213/ANE.0000000000006165
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    In stock of ZB MED Cologne/Königswinter

    Uk I Zs.78: Show issues Location:
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    ab Jg. 2022: Lesesaal (EG)
    Zs.MO 149: Show issues

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  5. Book ; Online: Design of Non-Coherent and Coherent Receivers for Chirp Spread Spectrum Systems

    Nguyen, Tung T. / Nguyen, Ha H.

    2021  

    Abstract: LoRaWAN is a prominent communication standard to enable reliable low-power, long-range communications for the Internet of Things (IoT). The modulation technique used in LoRaWAN, commonly known as LoRa modulation, is based on the principle of chirp spread ...

    Abstract LoRaWAN is a prominent communication standard to enable reliable low-power, long-range communications for the Internet of Things (IoT). The modulation technique used in LoRaWAN, commonly known as LoRa modulation, is based on the principle of chirp spread spectrum (CSS). While extensive research has been conducted on improving various aspects of LoRa transmitter, the design of LoRa receivers that can operate under practical conditions of timing and frequency offsets is missing. To fill this gap, this paper develops and presents detailed designs of timing, frequency and phase synchronization circuits for both non-coherent and coherent detection of CSS signals. More importantly, the proposed receiver can be used to detect the recently proposed CSS-based modulation that embeds extra information bits in the starting phases of conventional CSS symbols. Such a transmission scheme, referred to as phase-shift keying CSS (PSK-CSS) helps to improve the transmission rates of the conventional CSS system. In particular, it is shown that the bit error rate performance of the PSK-CSS scheme achieved with the proposed practical coherent receiver has only 0.25 dB gaps as compared to the ideal co-coherent receiver.

    Comment: The main ideas and algorithms presented in this paper were originally described in a technical report accompanying a U.S. provisional patent application no. 62/672,778, submitted in May 2018
    Keywords Electrical Engineering and Systems Science - Signal Processing
    Subject code 621
    Publishing date 2021-05-06
    Publishing country us
    Document type Book ; Online
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  6. Article ; Online: Utilization of 2-nitrophenols in annulations with aryl isothiocyanates towards the synthesis of 2-aminobenzoxazoles.

    Nguyen, Thanh D / Tran, Danh T / Huynh, Tan N / Ly, Thang M / Nguyen, Tung T

    RSC advances

    2023  Volume 13, Issue 26, Page(s) 18156–18159

    Abstract: A method for the annulation of 2-nitrophenols with aryl isothiocyanates is reported. The reactions proceeded in the presence of an iron(iii) acetylacetonate catalyst, elemental sulfur, NaOH as a base, and DMSO as a solvent. Derivatives of 2- ... ...

    Abstract A method for the annulation of 2-nitrophenols with aryl isothiocyanates is reported. The reactions proceeded in the presence of an iron(iii) acetylacetonate catalyst, elemental sulfur, NaOH as a base, and DMSO as a solvent. Derivatives of 2-aminobenzoxazoles bearing nitro, cyano, acetyl, sulfone, secondary amine, and pyrrolyl groups were successfully isolated.
    Language English
    Publishing date 2023-06-15
    Publishing country England
    Document type Journal Article
    ISSN 2046-2069
    ISSN (online) 2046-2069
    DOI 10.1039/d3ra02873a
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Composed solutions of synchronized patterns in multiplex networks of Kuramoto oscillators.

    Jain, Priya B / Nguyen, Tung T / Mináč, Ján / Muller, Lyle E / Budzinski, Roberto C

    Chaos (Woodbury, N.Y.)

    2023  Volume 33, Issue 10

    Abstract: Networks with different levels of interactions, including multilayer and multiplex networks, can display a rich diversity of dynamical behaviors and can be used to model and study a wide range of systems. Despite numerous efforts to investigate these ... ...

    Abstract Networks with different levels of interactions, including multilayer and multiplex networks, can display a rich diversity of dynamical behaviors and can be used to model and study a wide range of systems. Despite numerous efforts to investigate these networks, obtaining mathematical descriptions for the dynamics of multilayer and multiplex systems is still an open problem. Here, we combine ideas and concepts from linear algebra and graph theory with nonlinear dynamics to offer a novel approach to study multiplex networks of Kuramoto oscillators. Our approach allows us to study the dynamics of a large, multiplex network by decomposing it into two smaller systems: one representing the connection scheme within layers (intra-layer), and the other representing the connections between layers (inter-layer). Particularly, we use this approach to compose solutions for multiplex networks of Kuramoto oscillators. These solutions are given by a combination of solutions for the smaller systems given by the intra- and inter-layer systems, and in addition, our approach allows us to study the linear stability of these solutions.
    Language English
    Publishing date 2023-10-16
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1472677-4
    ISSN 1089-7682 ; 1054-1500
    ISSN (online) 1089-7682
    ISSN 1054-1500
    DOI 10.1063/5.0161399
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  8. Article ; Online: Oxidative annulation of acetophenones and 2-aminobenzothiazoles catalyzed by reusable nickel-doped LaMnO

    Pham, Phuong T / Nguyen, Duyen K / Phan, Nam T S / Le, Minh-Vien / Nguyen, Tung T

    RSC advances

    2023  Volume 13, Issue 5, Page(s) 3341–3345

    Abstract: Synthesis of imidazole[2,1- ...

    Abstract Synthesis of imidazole[2,1-
    Language English
    Publishing date 2023-01-23
    Publishing country England
    Document type Journal Article
    ISSN 2046-2069
    ISSN (online) 2046-2069
    DOI 10.1039/d2ra08045a
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  9. Article ; Online: Algebraic approach to the Kuramoto model.

    Muller, Lyle / Mináč, Ján / Nguyen, Tung T

    Physical review. E

    2021  Volume 104, Issue 2, Page(s) L022201

    Abstract: We study the Kuramoto model with attractive sine coupling. We introduce a complex-valued matrix formulation whose argument coincides with the original Kuramoto dynamics. We derive an exact solution for the complex-valued model, which permits analytical ... ...

    Abstract We study the Kuramoto model with attractive sine coupling. We introduce a complex-valued matrix formulation whose argument coincides with the original Kuramoto dynamics. We derive an exact solution for the complex-valued model, which permits analytical insight into individual realizations of the Kuramoto model. The existence of a complex-valued form of the Kuramoto model provides a key demonstration that, in some cases, reformulations of nonlinear dynamics in higher-order number fields may provide tractable analytical approaches.
    Language English
    Publishing date 2021-09-16
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2844562-4
    ISSN 2470-0053 ; 2470-0045
    ISSN (online) 2470-0053
    ISSN 2470-0045
    DOI 10.1103/PhysRevE.104.L022201
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  10. Article ; Online: An efficient and green synthesis of 2-phenylquinazolin-4(3H)-ones via t-BuONa-mediated oxidative condensation of 2-aminobenzamides and benzyl alcohols under solvent- and transition metal-free conditions

    Nguyen Vy T. B. / Tran Dat P. / Nguyen Tung T. / Nguyen Khoa D. / Le Ha V.

    Green Processing and Synthesis, Vol 12, Iss 1, Pp 3475-

    2023  Volume 6

    Abstract: Quinazolinone synthesis usually requires employing sensitive substrates, hazardous solvents, large excess oxidants, and expensive catalysts. In this study, an efficient and environmentally benign pathway was developed to synthesize 2-phenylquinazolin-4( ... ...

    Abstract Quinazolinone synthesis usually requires employing sensitive substrates, hazardous solvents, large excess oxidants, and expensive catalysts. In this study, an efficient and environmentally benign pathway was developed to synthesize 2-phenylquinazolin-4(3H)-one via oxidative coupling between commercially available and stable chemicals, including 2-aminobenzamide and benzyl alcohol without toxic oxidizing agents and transition-metal catalysts. A high yield of the desired product (up to 84%) was obtained at 120°C for 24 h in the presence of oxygen as a green oxidant and t-BuONa as a base. Importantly, the study scope was expanded toward successfully producing various 2-phenylquinazolin-4(3H)-one derivatives in moderate-to-good yields. Furthermore, control experiments proposed that the conversion involved the initial partial oxidation of benzyl alcohol to the benzaldehyde intermediate under basic conditions, followed by the condensation, intramolecular nucleophilic addition, and oxidative dehydrogenation to 2-phenylquinazolin-4(3H)-one.
    Keywords 2-phenylquinazolin-4(3h)-one ; benzyl alcohol ; green conditions ; oxidative coupling ; Chemistry ; QD1-999
    Subject code 540
    Language English
    Publishing date 2023-05-01T00:00:00Z
    Publisher De Gruyter
    Document type Article ; Online
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