Volume 7 (2017)

Journal of Science

ISSN 1859-2333

Can Tho University

Can Tho University Journal of Science ISSN 1859-2333Volume 7 (2017)

EDITORIAL BOARD

Editor-in-ChiefHa Thanh Toan

Deputy Editor-in-ChiefNguyen Thanh Phuong

Editorial SecretariatTran Thanh Dien

Secretary of Editorial BoardTran Thanh Be

Members of Editorial BoardTetsu Ando

Tokyo University of Agriculture and Technology, Japan Fu-Sung Frank Chiang

National Taiwan Ocean University, Taiwan

Kishio Hatai

Nippon Veterinary and Life Science University, Japan Le Van Hoa

Can Tho University, Viet Nam

Atsushi Ishimatsu

Nagasaki University, Japan

Nguyen Ngoc Lam

Institute of Oceanography, VAST, Viet Nam

Juan Boo Liang

Universiti Putra Malaysia, Malaysia

Hoang Ngoc Long

Institute of Physics, VAST, Viet Nam

Nguyen Van Thu

Can Tho University, Viet Nam

Ly Nguyen Binh

Can Tho University, Viet Nam

Nguyen Minh Chon

Can Tho University, Viet Nam

Vo Thanh Danh

Can Tho University, Viet Nam

Nguyen Ngoc Dien

University of Economics and Law, VNU-HCM, Viet Nam Bui Thi Buu Hue

Can Tho University, Viet Nam

Nguyen Chi Ngon

Can Tho University, Viet Nam

Trinh Sam

Ho Chi Minh City University of Pedagogy, Viet Nam Nguyen Hieu Trung

Can Tho University, Viet Nam

Tran Thanh Be

Can Tho Inst. for Socio-Economic Dev. Studies, Viet Nam

Contact addressCan Tho University Journal of Science. 4th Floor, Can Tho University Administration Building. Campus II, 3/2 street, Ninh Kieu district, Can Tho city, Viet Nam. Tel: (84-0710) 3872 157; Fax: (84-0710) 3838 474. Email: tapchidhct@ctu.edu.vn.

Publication licence No: 101/GP.BTTTT dated on April 10, 2015, granted by Ministry of Information and

Communications.

Printed by Can Tho University Publishing House.

Printed and Registered in November 2017; 100 copies.

Can Tho University Journal of Science Vol 7 (2017)

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CONTENT

Improvement of tap water quality for domestic use by membrane process Cao Ngoc Dan Thanh, Truong Minh Hong, Vo Thi Kim Quyen, Vo Thi Dieu Hien and Bui Xuan Thanh .................................................... 1

Soil diazotrophic community structure altered in rice crop rotated with mungbean or maize in Cai Lay district, Tien Giang province Do Thi Xuan, Qiong Wang, Sadhna Alström, Vo Thi Guong, Anna Rosling and Nils Högberg ... 6

Determination of coke on promoted zirconium oxide catalysts in the isomerization re-action of pentane and hexane mixture at high pressure Nguyen Dien Trung, Luu Cam Loc and Nguyen Tri .......................................................... 13

Design a model of glass cleaning device Nguyen Huynh Anh Duy, Nguyen Van Khanh and Nguyen Chi Ngon ................................................ 19

Isolation and identification of lipid-degrading yeast from wastewater of canteens and restaurants in Ninh Kieu district, Can Tho city Nguyen Ngoc Tan and Cao Ngoc Diep ............... 27

One unusual sterol from Polyscias fruticosa (L.) Harms (Araliaceae) Nguyen Thi Thu Tram, Huynh Du Tuyet and QuachNhat Minh ........................................................... 33

Fuzzy cluster analysis for probability density functions based on width criterion Vo Van Tai, Pham Toan Dinh and Nguyen Hoang Yen ............................................. 37

The genetic diversity and the antibacterial activity of Ageratum conyzoides Linn Huynh Kim Dieu and Nguyen Thi Han Ni .......... 45

Selection of thermotolerant lactic acid bacteria producing high antibacterial activity and production of biomass from tofu sour liquid Huynh Nguyen Nhu Thu, Bui Hoang Dang Long, Huynh Xuan Phong, Takeshi Zendo, Kenji Sonomoto and Ngo Thi Phuong Dung ....... 51

Effect of associated bacteria on gnotobiotic Artemia performance Huynh Thanh Toi ................................................ 58

Flocculation efficiency and quality of flocculated algae with chitosan at different pH values Ngo Thi Thu Thao, Tran Thi Ngoc Hanh and Dang Thi Thuy An ............................................... 65

Isolation and selection of lactic acid bacteria that can antagonize Vibrio parahaemolyticus causing acute hepatopancreatic necrosis disease in whiteleg shrimp (Penaeus vannamei) Nguyen Thi Truc Linh, Huynh Thanh Phong, Nguyen Trong Nghia, Dang Thi Hoang Oanh and Truong Quoc Phu ........................................ 74

Giant freshwater prawn (Macrobrachium rosenbergii de Man, 1879) farming in brackish water areas of the Mekong Delta, Vietnam Tran Ngoc Hai, Huynh Kim Huong, Le Quoc Viet, Do Thi Thanh Huong and Nguyen Thanh Phuong ....................................... 82

Drama-based role play activities to impact on students’ speaking performance Do Thi Ngoc Nhi and Nguyen Buu Huan ............ 91

An investigation into the tale values on the legends of Nguyen Anh (king Gia Long) in the southern region of Vietnam Le Thi Dieu Ha ................................................. 100

Environmental and human resource development issues in Vietnam: The case study of the Mekong Delta Ngan Collins, Nguyen Hong Tin, Sandra Jones andPauline Stanton ................................................. 109

Promoting learner autonomy: Lesson from using project work as a supplement in English skills courses Nguyen Van Loi ................................................ 118

Leadership styles of Vietnamese higher education leaders: Transformational, transac-tional, or laissez-faire Pham Dinh Xuan Thu, Hitendra Pillay and Amanda Mergler ............................................... 126

Can Tho University Journal of Science Vol 7 (2017)

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Reading strategy instruction to Vietnamese young language learners: Teachers’ prac-tices and perceptions Tran Thi Be Ba and Nguyen Buu Huan ............ 138

Exploring drivers influencing consumers’ attitude towards mobile marketing Huynh Nhut Phuong and Nguyen Thuy An ....... 148

Managerial human resource quality of firms in the Mekong Delta, Vietnam Nguyen Pham Thanh Nam and Le Khuong Ninh ................................................ 160

About the Journal

1. Can Tho University Journal of Science, ISSN 1859-2333 is published according to the publication license No. 101/GP.BTTTT dated on April 10, 2015 of the Ministry of Information and Communications.

2. The Journal publishes original research articles, review articles, short communications and technical articles on all aspects of Natural Sciences, Technology and Environment; Agriculture, Fisheries and Biotechnology; Social Sciences and Humanities; and Education and Political Sciences, Economics and Law. Only article that has not been previously published elsewhere, nor is it before another journal for consideration.

3. Manuscripts should contain up to 5 keywords and an abstract of up to 250 words. Each manuscript should not exceed 16 pages (A4) for research and technical article, 30 pages for a review article and 8 pages for a short communication including figures, charts, diagrams and reference materials, typed in the Times New Roman font with size 11 and double spacing.

4. Manuscripts should be prepared according to the following order: Article title, Author(s), Affil iation(s), Abstract, Keywords, Introduction, Materials and Methods, Theory/Calculation (if any), Results, Discussion, Conclusions, Acknowledgements (if there is), References. Each manuscript must be clearly defined and numbered sections. Subsections should be numbered 1, then 1.1, 1.1.1, a, b; then 1.2; etc. The abstract is not included in section numbering.

5. Citations may be made directly or parenthetically. Reference list should be arranged first alphabetically and then further sorted chronologically if necessary. More than one reference from the same author(s) in the same year must be identified by the letters 'a', 'b', 'c', etc., placed after the year of publication. Please see the detailed instructions to authors at the Journal website: sj.ctu.edu.vn.

6. Online submission: sj.ctu.edu.vn