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| 1 | Xanthine oxidase inhibitors from Archidendron clypearia(Jack.) I.C. Nielsen: Results from systematic screening of Vietnamese medicinal plants显示文摘Objective: To screen Vietnamese medicinal plants for xanthine oxidase(XO) inhibitory activity and to isolate XO inhibitor(s) from the most active plant. Methods: The plants materials were extracted by methanol. The active plant materials were fractionated using different organic solvents, including n-hexane, ethyl acetate, and n-butanol. Bioassay-guided fractionation and column chromatography were used to isolate compounds. The compounds structures were elucidated by analysis of spectroscopic data, including IR, MS, and NMR. Results: Three hundreds and eleven methanol extracts(CME) belonging to 301 Vietnamese herbs were screened for XO inhibitory activity. Among these plants, 57 extracts displayed XO inhibitory activity at 100 μg/m L with inhibition rates of over 50%. The extracts of Archidendron clypearia, Smilax poilanei, Linociera ramiflora and Passiflora foetida exhibited the greatest potency with IC_(50) values below 30 μg/m L. Chemical study performed on the extract of Archidendron clypearia resulted in the isolation of six compounds, including 1-octacosanol, docosenoic acid, daucosterol, methyl gallate, quercitrin and(-)-7-O-galloyltricetiflavan. The compound(-)-7-O-galloyltricetiflavan showed the most potent XO inhibitory activity with an IC_(50) value of 25.5 μmol/L. Conclusions: From this investigation, four Vietnamese medicinal plants were identified to have XO inhibitory effects with IC_(50) values of the methanol extracts below 30 μg/m L. Compound(-)-7-O-galloyltricetiflavan was identified as an XO inhibitor from Archidendron clypearia with IC_(50) value of 25.5 μmol/L. | Nguyen Thuy Duong Pham Duc Vinh Phuong Thien Thuong Nguyen Thi Hoai Le Nguyen Thanh Tran The Bach Nguyen Hai Nam Nguyen Hoang Anh | 2017 | Asian Pacific Journal of Tropical Medicine2017，10，6： | 5 |
| 2 | Foam processing and cellular structure of polypropylene/clay nanocomposites显示文摘 | Nam Pham Hoai Maiti Pralay Okamoto Masami | 2002 | Polymer Engineering and Science2002，42，9： | 2 |
| 3 | A Hierarchical Structure and Properties of Intercalated Polypropylene/Clay Nanocornposites 显示文摘 | Pham Hoai Nam Pralay Maiti Masami Okamoto | 2001 | Polymer2001，42，： | 1 |
| 4 | Ecoregional variations of aboveground biomass and stand structure in evergreen broadleaved forests显示文摘Biotic and abiotic factors control aboveground biomass(AGB)and the structure of forest ecosystems.This study analyses the variation of AGB and stand structure of evergreen broadleaved forests among six ecoregions of Vietnam.A data set of 1731-ha plots from 52 locations in undisturbed old-growth forests was developed.The results indicate that basal area and AGB are closely correlated with annual precipitation,but not with annual temperature,evaporation or hours of sunshine.Basal area and AGB are positively correlated with trees>30 cm DBH.Most areas surveyed(52.6%)in these old-growth forests had AGB of 100–200 Mg ha^-1;5.2%had AGB of 400–500 Mg ha^-1,and 0.6%had AGB of>800 Mg ha^-1.Seventy percent of the areas surveyed had stand densities of 300–600 ind.ha^-1,and 64%had basal areas of 20–40 m^2 ha^-1.Precipitation is an important factor influencing the AGB of old-growth,evergreen broadleaved forests in Vietnam.Disturbances causing the loss of large-diameter trees(e.g.,>100 cm DBH)affects AGB but may not seriously affect stand density. | Tran Van Do Mamoru Yamamoto Osamu Kozan Vo Dai Hai Phung Dinh Trung Nguyen Toan Thang Lai Thanh Hai Vu Thanh Nam Trieu Thai Hung Hoang Van Thang Tran Duc Manh Cao Chi Khiem Vu Tien Lam Nguyen Quang Hung Tran Hoang Quy Pham Quang Tuyen Trinh Ngoc Bon Nguyen Thi Thu Phuong Ninh Viet Khuong Nguyen Van Tuan Dang Thi Hai Ha Tran Hai Long Dang Van Thuyet Dang Thinh Trieu Nguyen Van Thinh Tran Anh Hai Duong Quang Trung Nguyen Van Bich Dinh Hai Dang Pham Tien Dung Nguyen Huy Hoang Le Thi Hanh Phan Minh Quang Nguyen Thi Thuy Huong Hoang Thanh Son Nguyen Thanh Son Nguyen Thi Van Anh Nguyen Thi Hoai Anh Pham Dinh Sam Hoang Thi Nhung Hoang Van Thanh Nguyen Huu Thinh Tran Hong Van Ho Trung Luong Bui Kieu Hung | 2020 | Journal of Forestry Research2020，31，5： | 1 |
| 5 | A house of cards structure in polypropylene/clay nanocomposites under elongational flow显示文摘 | Masami Okamoto Pham Hoai Nam Pralay Maiti | 2001 | Nano Letters2001，，1： | 1 |
| 6 | Influence of Crystallization of Intercalation, Morphology and Mechanical Properties of Polypropylene/Clay Nanoeecnposites 显示文摘 | Pralay Maiti Pham Hoai Nam Masami Okamoto | 2002 | Macromolecules2002，35，： | 1 |
| 7 | 显示文摘 | Pham Hoai Nam Pralay Maiti Masami Okamoto | 2001 | Polymer2001，42，23： | 1 |
| 8 | A hierarchical structure and properties of intercalated polypropylene/clay nanocomposites显示文摘 | Pralay Maiti Masami Okamoto | 2001 | Polymer2001，42，： | 1 |
| 9 | Melt intercalation ofpoly(L-lactide) chains into clay galleries显示文摘 | Pham Hoai Nam Masahiro Kaneko Naoya Ninomiya | 2005 | Polymer2005，46，： | 1 |
| 10 | A hierarchical structure and properties of intercalated polypropylene/clay nanocomposites 显示文摘 | PHAM HOAI NAM PRALAY MATTI MASAMI OKAMOTO | 2001 | Polymer2001，42，： | 1 |
| 11 | Foam processing and cellular structure of polypropylene/clay nanocomposites显示文摘 | Pham Hoai Nam Pralay Mait I Masami Okamoto | | 0，，： | 1 |
| 12 | Biaxial flow- induced alignment of silicate layers in polypropylene/clay nanocomposite foam显示文摘 | Masami Okamoto Pham Hoai Nam Pralay Maiti | 2001 | Nano Letters2001，，1： | 1 |
| 13 | Foam processing and cellular structure of polypropylene/clay nanocomposites显示文摘 | Pham Hoai Nam Pralay Maiti Masami Okamoto | 2002 | Polymer Engineering And Science2002，42，： | 1 |
| 14 | Biaxial Flow - Induced Alignment of Silicate Layers in Polypropylene/Clay Nanocomposite Foam 显示文摘 | Masami Okamoto Pham Hoai Nam Pralay Maiti Tadao Kotaka Takashi Nakayama Mitsuko Takada Masahiro Ohshima Arimitsu Usuki Naoki Hasegawa and Hirotaka Okamoto | 2001 | Nano letters2001，1，： | 1 |
| 15 | Foam Processing and Cellular Structure of Polypropylene/Clay Nanocomposites 显示文摘 | Pham Hoai Nam Pralay Maiti Masami Okamoto and Tadao Kotada | 2002 | Polymer Engineering And Science2002，42，： | 1 |
| 16 | A hierarchical structure and properties of intercalated polypropylene/clay nanocomposites显示文摘 | Pham Hoai Nam Pralay Maiti Masami Okamoto | 2001 | Polymer2001，42，： | 1 |
| 17 | Foam processing and cellular structure of polypropylene/clay nanocomposites显示文摘 | Pham Hoai Nam Pralay Maiti Masami Okamoto | | 0，，9： | 1 |
| 18 | Biaxial Flow-Induced Alignment of Silicate Layers in Polypropylene/Clay Nanocomposite Foam显示文摘 | Masami Okamoto Pham Hoai Nam Pralay Maiti Tadao Kotaka Takashi Nakayama Mitsuko Takada Masahiro Ohshima Arimitsu Usuki Naoki Hasegawa and Hirotaka Okamoto | 2001 | Nano letters2001，1，： | 1 |
| 19 | Foam Processing and Cellular Structure of Polypropylene/Clay Nanocomposites 显示文摘 | Pham Hoai Nam Pralay Maiti Masami Okamoto | 2002 | Polym Eng Sci2002，42，9： | 1 |
| 20 | Foam Processing and Cellular Structure of Polypropylene/Clay Nanocomposites显示文摘 | Pham Hoai Nam Pralay Maiti Masami Okamoto and Tadao Kotaka | 2002 | Polymer Engineering And Science2002，42，： | 1 |
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