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  • 1
    Online Resource
    Online Resource
    Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications) ; 2022
    In:  Vietnam Journal of Marine Science and Technology Vol. 22, No. 2 ( 2022-06-21), p. 209-216
    In: Vietnam Journal of Marine Science and Technology, Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications), Vol. 22, No. 2 ( 2022-06-21), p. 209-216
    Abstract: Plastic materials are defined as including the whole of organic polymers owning plasticity. Their production increases rapidly due to their superior properties and applications in our life. Currently, the annual production of plastic is estimated at nearly 400 million tons. About 10% of the plastic produced is discharged into the seas and oceans. Microplastics (MP, less than 5 mm in size) are non-biodegradable and persistent in the environment and have the ability to accumulate in various environmental components, organisms and other human beings through the food chain. Therefore, assessing microplastic pollution becomes essential for the marine and ocean environment. This study aims to evaluate microplastic pollution in Nam Dinh seawater. Water samples were taken in summer 2020 and spring 2021 in Giao Thuy district, Nam Dinh province. Samples were treated with 30% H2O2 solution to remove organic matters and then microplastic buoyantly separated using saturated NaCl solution. MP was identified through observation under a stereo microscope (Olympus SZX2-TR300) and its nature was determined through infrared spectroscopy (µFTIR). Results show that a large level of pollution (average 6 to 8 particles/m3 and 10–14 million particles/km2) is associated with the predominant of colored fibers among MP characteristics. Most of the microplastics identified are Polypropylene in nature. Next, more research needs to be invested in this pollution problem, such as expanding the scope and research object.
    Type of Medium: Online Resource
    ISSN: 1859-3097
    Language: Unknown
    Publisher: Publishing House for Science and Technology, Vietnam Academy of Science and Technology (Publications)
    Publication Date: 2022
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  • 2
    Online Resource
    Online Resource
    Vietnam National University Journal of Science ; 2020
    In:  VNU Journal of Science: Medical and Pharmaceutical Sciences Vol. 36, No. 3 ( 2020-09-25)
    In: VNU Journal of Science: Medical and Pharmaceutical Sciences, Vietnam National University Journal of Science, Vol. 36, No. 3 ( 2020-09-25)
    Abstract: This paper uses the model of experimental mouse liver damage with paracetamol to evaluate the liver protective effects of the methanol extract (Colocasia esculenta (L.) Schott) (MCE). After 8 days, the hepatoprotective activities of MCE in mice (damaged by paracetamol) at doses of 500, 1,000 and 2,000 mg/kg/day proved effective as the AST enzyme content decreased by 6.98, 22.84 and 26.59%, respectively; and ALT decreased by 53.17, 56.46 and 57.93%, respectively. MCE at a dose of 1,000 mg/kg/day had a protective effect equivalent to that of silymarin (used in liver treatment) at a dose of 50 mg/kg/day and MCE at a dose of 2,000 mg/kg/day had better effect. Observation of the microscopic liver tissue cross section also revealed that the mice treated with MCE of C. esculenta at doses of 1,000 and 2,000 mg/kg/day showed significantly improvement in their liver tissues compared to the non-treated control group. Keywords: Colocasia esculenta, hepatoprotective, paracetamol. References [1] S. Shahani. Evaluation of hepatoprotective efficacy of APCL-A poly herbal formulation in vivo in rats, Indian Drugs. 36(1999) 628-631.[2] Y. Cui, X. Yang, X. Lu, J. Chen, Y. Zhao. Protective effects of polyphenols-enriched extract from Huangshan Maofeng green tea against CCl4-induced liver injury in mice, Chemico- Biological Interactions 220 (5) (2014) 75-83. https://doi.org/10.1016/j.cbi.2014.06.018 [3] K.C. Choi, W.T. Chung, J.K. Kwon, J.Y. Yu, Y.S. Jang, S.M. Park, S.Y. Lee, J.C. Lee. Inhibitory effects of quercetin on aflatoxin B1 induced hepatic damage in mice, Food Chemical Toxicology, 48 (10) (2010) 2747-2753 . https://doi.org/10.1016/j.fct.2010.07.001[4] E.S. Sabina, J. Samue, S.R. Ramya, S. Patel, N. Mandal, P. Preety, P.P. Mishra, M.K. Rasool. Hepatoprotective and antioxidant potential of Spirulina fusiformis on acetaminophen induced hepatotoxicity in mice, International Journal of Integrative Biology 6 (1) (2009) 1-5. http://ijib.classicrus.com/.../1501.pdf[5] Pham Hoang Ho. Vietnamese plants, episode III. Young Publishing House, (1999), pp. 353 (in Vietnamese).[6] C.O. Eleazu, M. Iroaganachi, K.C. Eleazu. Ameliorative potentials of cocoyam (Colocasia esculenta L.) and unripe plantain (Musa paradisiaca L.) on the relative tissue weights ofstreptozotocin-induced diabetic rats. Journal of Diabetes Research, 197 (2013), https://doi.org/10.1155/2013/160964.[7] R.C. Cambie, L.R. Ferguson. Potential functional foods in the traditional Maori diet. Mutation Research Letters 523–524 (2003) 109-117. https://doi.org/10.1016/s0027-5107(02)00344-5[8] C.L. Abraham, K. Yoshinori, T. Masakuni, I. Hironori, O. Hirosuke, T. Hajime. Flavonoid glycosides in the shoot system of Okinawa Taumu (Colocasia esculenta S). Food Chemistry 119 (2010) 630- 635. https://doi.org/10.1016/j.foodchem.2009.07.004[9] P.J. Bouic, D. Etsebeth, R.W. Liebenberg, C.F. Albrecht, K. Pegel, J.P.P. Van. Beta sitosterol and beta sitosterol glycoside stimulate human peripheral blood lymphocyte proliferation: Implications for their use as an immunomodulatory vitamin combination. International Journal of Immuno-pharmacology 18 (12) (1996) 693-700. https://doi.org/10.1016/S0192-0561(97)85551-8.[10] Vo Van Chi. Dictionary of Vietnamese medicinal plants. Medical Publishing House (1997), pp. 871-873 (in Vietnamese).[11] Do Trung Dam. Method of determining drug toxicity. Medical Publishing House, Hanoi (2014), pp. 11-137 (in Vietnamese). [12] J.T. Litchfield, F. Wilcoxon. A simplified method of evaluating dose-effect experiments, Journal of Pharmcology and Experimental Therapeutics, 96 (2) (1949) 99-113. PMID: 18152921 [13] Doan Thi Nhu, Do Trung Dam, Pham Duy Mai. Method research of the pharmacological effect of drugs from medicinal herbs, Science and Technics Publishing House, Hanoi (2006), pp. 142 (in Vietnamese).[14] A. Godwin. Histochemical uses of haematoxylin - A Review. JPCS 1 (2011) 24-34. [15] Ho Thi Thanh Huyen, Thai Nguyen Hung Thu, Nguyen Thai An. Some results of plan microscopic studies and chemical composition of Bombax malabaricum DC., Bombacaceae, Proceeding Pharma Indochina VII, 10/2011, The 7th Indochina Conference on Pharmaceutical science, Bangkok, Thai Lan (2011) 270-274.[16] A.N. Chinonyelum, A.P. Uwadiegwu, O.C. Nwachukwu, O. Emmanuel. Evaluation of hepatoprotective activity of Colocasia esculenta (L. Schott) leaves on thioacetamide-induced hepatotoxicity in rats. Pakistan Journal Pharmaceutical Sciences, 28 (6S) (2015) 2237-2241. [17] O.F. Dayo, B.C. Eluke, E.O. Ukaejiofo, O.L. Olayinka, C.I. Johnpaul, O.A.K .Tajudeen, I. Chinwe, L.S. Adetona. Hepatoproactive and haematopoietic modulatory efficacy of leaf extract of Colocasia esculenta in Albino wistar rats. International Journal of Tropical Medicine 12 (3-6) (2017) 35-41. https://doi.org/3923/ijtmed.2017.35.41.          
    Type of Medium: Online Resource
    ISSN: 2588-1132 , 2615-9309
    Language: Unknown
    Publisher: Vietnam National University Journal of Science
    Publication Date: 2020
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  • 3
    Online Resource
    Online Resource
    Vietnam National University Journal of Science ; 2017
    In:  VNU Journal of Science: Natural Sciences and Technology Vol. 33, No. 2S ( 2017-10-10)
    In: VNU Journal of Science: Natural Sciences and Technology, Vietnam National University Journal of Science, Vol. 33, No. 2S ( 2017-10-10)
    Abstract: Typhonium flagelliforme is a medicinal plant that has variety of uses. In medicinal traditional T. flagelliforme is used to treatment cough, headache, stomach pain chronic, and tracheitis. Moreover, use fresh bulbs treatment furuncle, the bites of poisonous insects. The active components in T. flagelliforme are flavonoids. In this study, the T. flagelliforme extract was obtained by methanol  to determine the chemical composition. Then, The extracts of methanol are extracted with polarization increases gradually solvents such as haxane, dichloromethane and ethyl acetate. Determination of antioxidant activity, cytotoxic activity of extracted fractions. Results obtained showed that the chemical compositions by the qualitative reaction preliminary were identified from T. flagelliforme containing reducing sugars, amino acids, organic acids, flavonoids, alcaloids, sterols. The antioxidant capacity of the ethyl acetate fraction reached 94.76 μg/ml, 10 times higher than the positive control is Quercetin. Cytotoxic activity of the haxane and diclomethane extracted fractions from T. flagelliforme exhibited cytotoxic activity on all three experimental cancers cell lines: KB, HepG2, Lu after 72h of culture with IC50 values ​​range from 92.8 to 107.76 μg/ml. From dichlomethane extracted of T. flagelliforme was purified TF1 as Stigmast-4-en- 3-on.    
    Type of Medium: Online Resource
    ISSN: 2588-1140 , 2588-1140
    Language: Unknown
    Publisher: Vietnam National University Journal of Science
    Publication Date: 2017
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  • 4
    Online Resource
    Online Resource
    Vietnam Association of Obstetrics and Gynecology - VAGO ; 2022
    In:  Tạp chí Phụ sản Vol. 20, No. 3 ( 2022-10-10), p. 150-155
    In: Tạp chí Phụ sản, Vietnam Association of Obstetrics and Gynecology - VAGO, Vol. 20, No. 3 ( 2022-10-10), p. 150-155
    Abstract: Mục tiêu: Xác định mối tương quan giữa chỉ số phân mảnh DNA tinh trùng (DFI - DNA fragmentation index) được đo bằng phương pháp khảo sát sự phân tán nhiễm sắc chất của tinh trùng (SCD - sperm chromatin dispersion test) và các chỉ số tinh dịch đồ ở nam giới vô sinh. Đối tượng và phương pháp: Nghiên cứu mô tả cắt ngang thực hiện trên 150 mẫu tinh dịch của bệnh nhân nam được lấy bằng phương pháp thủ dâm tại Trung tâm Hỗ trợ sinh sản và nam học - Bệnh viện Sản Nhi Phú Thọ. Đánh giá các chỉ số tinh dịch đồ theo WHO (2021) và xác định chỉ số phân mảnh DNA tinh trùng bằng phương pháp SCD. Kết quả: Chỉ số mức độ phân mảnh DNA tinh trùng tương quan nghịch với:mật độ tinh trùng (r = -0,405; p 〈 0,001), tỷ lệ di động (r = - 0,30; p 〈 0,001), tỷ lệ sống của tinh trùng (r = - 0,31; p 〈 0,001), hình dạng tinh trùng (r = -0,456; p = 〈 0,001). Không có sự khác biệt nào về mức độ phân mảnh DNA của tinh trùng theo: độ tuổi, thời gian kiêng xuất tinh, thể tích xuất tinh, pH. Kết luận: Kết quả DFI-SCD có sự tương quan nghịch với: mật độ tinh trùng, tỷ lệ tinh trùng di động, tỷ lệ sống của tinh trùng, hình dạng tinh trùng. Không tìm thấy mối tương quan giữa DFI-SCD với: độ tuổi, thời gian kiêng xuất tinh, pH.
    Type of Medium: Online Resource
    ISSN: 1859-3844 , 1859-3844
    URL: Issue
    Language: Unknown
    Publisher: Vietnam Association of Obstetrics and Gynecology - VAGO
    Publication Date: 2022
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  • 5
    Online Resource
    Online Resource
    Project Euclid ; 2020
    In:  Proceedings of the Japan Academy, Series A, Mathematical Sciences Vol. 96, No. 2 ( 2020-2-1)
    In: Proceedings of the Japan Academy, Series A, Mathematical Sciences, Project Euclid, Vol. 96, No. 2 ( 2020-2-1)
    Type of Medium: Online Resource
    ISSN: 0386-2194
    RVK:
    Language: Unknown
    Publisher: Project Euclid
    Publication Date: 2020
    detail.hit.zdb_id: 2192927-0
    SSG: 17,1
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  • 6
    Online Resource
    Online Resource
    Elsevier BV ; 2017
    In:  Comptes Rendus Mathematique Vol. 355, No. 10 ( 2017-10), p. 1041-1045
    In: Comptes Rendus Mathematique, Elsevier BV, Vol. 355, No. 10 ( 2017-10), p. 1041-1045
    Type of Medium: Online Resource
    ISSN: 1631-073X
    RVK:
    RVK:
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2017
    detail.hit.zdb_id: 2079115-X
    SSG: 17,1
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  • 7
    Online Resource
    Online Resource
    Springer Science and Business Media LLC ; 2020
    In:  Mathematische Annalen Vol. 376, No. 3-4 ( 2020-04), p. 1195-1223
    In: Mathematische Annalen, Springer Science and Business Media LLC, Vol. 376, No. 3-4 ( 2020-04), p. 1195-1223
    Type of Medium: Online Resource
    ISSN: 0025-5831 , 1432-1807
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2020
    detail.hit.zdb_id: 2161244-4
    detail.hit.zdb_id: 285-9
    detail.hit.zdb_id: 1462120-4
    SSG: 17,1
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  • 8
    Online Resource
    Online Resource
    Walter de Gruyter GmbH ; 2018
    In:  Journal für die reine und angewandte Mathematik (Crelles Journal) Vol. 2018, No. 735 ( 2018-2-1), p. 175-198
    In: Journal für die reine und angewandte Mathematik (Crelles Journal), Walter de Gruyter GmbH, Vol. 2018, No. 735 ( 2018-2-1), p. 175-198
    Abstract: Thanks to the work of Hrushovski and Loeser on motivic Milnor fibers, we give a model-theoretic proof for the motivic Thom–Sebastiani theorem in the case of regular functions. Moreover, slightly extending Hrushovski–Loeser’s construction adjusted to Sebag, Loeser and Nicaise’s motivic integration for formal schemes and rigid varieties, we formulate and prove an analogous result for formal functions. The latter is meaningful as it has been a crucial element of constructing Kontsevich–Soibelman’s theory of motivic Donaldson–Thomas invariants.
    Type of Medium: Online Resource
    ISSN: 1435-5345 , 0075-4102
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2018
    detail.hit.zdb_id: 2193867-2
    detail.hit.zdb_id: 1468592-9
    detail.hit.zdb_id: 3079-X
    SSG: 17,1
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  • 9
    Online Resource
    Online Resource
    International Press of Boston ; 2022
    In:  Journal of Differential Geometry Vol. 120, No. 3 ( 2022-3-1)
    In: Journal of Differential Geometry, International Press of Boston, Vol. 120, No. 3 ( 2022-3-1)
    Type of Medium: Online Resource
    ISSN: 0022-040X
    Language: Unknown
    Publisher: International Press of Boston
    Publication Date: 2022
    detail.hit.zdb_id: 2004317-X
    detail.hit.zdb_id: 300904-X
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  • 10
    Online Resource
    Online Resource
    Mathematical Sciences Publishers ; 2012
    In:  Algebra & Number Theory Vol. 6, No. 2 ( 2012-6-24), p. 389-404
    In: Algebra & Number Theory, Mathematical Sciences Publishers, Vol. 6, No. 2 ( 2012-6-24), p. 389-404
    Type of Medium: Online Resource
    ISSN: 1944-7833 , 1937-0652
    URL: Issue
    Language: English
    Publisher: Mathematical Sciences Publishers
    Publication Date: 2012
    detail.hit.zdb_id: 2385233-1
    SSG: 17,1
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