SCOPUS 2020

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The Stakeholders and Image Building of Academic Institutions
(Research and Development Institute Suan Dusit University, 2020) Nopporn Peatrat; Sasithorn Ranabut; Doungduen Wannakul; Subsiri Seniwong Na Ayudhaya; N. Peatrat; Faculty of Education, Suan Dusit University, Lampang Center, Lampang, 52100, Thailand; email: np_peatrat@yahoo.com
Relevant stakeholders to academic institutions are essential to the institutionsÕ operations and activities, and potentially receive both positive and negative impact from their institutional activities. As a result, expectation of different groups of stakeholders should be monitored and well managed. The key points consist of the following: determining stakeholders, compilations and analysis of expectations, responding to expectations, monitoring and evaluation. Importantly, the administrators of academic institutions should support the relevant stakeholdersÕ participation. Key factors which administrators needto adhere closely are as follows: First, setting a clear vision and mission that reflects the philosophy and policy of the institution through ways of behavioral observations, symbols and communications. Second, institutional identity must be clearly defined and obviously established. Third, integrated marketing communications by means of internal and external communications should be imposed and acted upon. Fourth, positively creating the image and reputation of the academic institution through stakeholdersÕ engagement, and finally, producing future stakeholders by way of mounting and finding prospects, which could be gained from carrying out effective communication channels between the institution and stakeholders, building positive images and perceptions on identity and reputation of the institution. © 2020, Research and Development Institute Suan Dusit University. All rights reserved.
Effect of zeolite on mechanical and barrier properties of pbat films for life extension of agricultural products
(Trans Tech Publications Ltd, 2020) Poonsub Threepopnatkul; Kamonchanok Wongsuton; Chonlada Jaiaue; Nattanan Rakkietwinai; Amnard Stittatrakul; Chanin Kulsetthanchalee; P. Threepopnatkul; Department of Materials Science and Engineering, Faculty of Engineering and Industrial Technology, Silpakorn University, Nakhon Pathom, 73000, Thailand; email: poonsubt@yahoo.com
In this research, the biodegradable film of poly(butylene adipate-co-terephthalate) (PBAT) would be used as the polymer matrix. The influence of zeolite (as the filler) type and content were investigated on the mechanical and barrier properties of film packaging. Zeolite was treated with (3-aminopropyl) trimethoxy silane. Films were produced by cast film extruder. Effects of different types of zeolite (5A and 13X) as well as zeolite loading (1-5 wt%) on mechanical properties and permeability of gases (oxygen, carbon dioxide and water vapor) of PBAT composites films have been extensively studied. Tensile properties of PBAT incorporated with zelolite 5A are higher than the one with zeolite 13X. In addition, increasing zeolite content into PBAT film is likely to improve YoungÕs modulus with the sacrifices of both tensile strength and percentage of elongation at break of PBAT film. For barrier properties, PBAT/zeolite 5A possessed lower permeation both of oxygen and carbon dioxide gases than PBAT/zeolite 13X. The effect of zeolite content plays a major role on oxygen and carbon dioxide permeability of composite films. PBAT/zeolite composite film could certainly extend the ripening period of Homthong bananas for approximately longer than one week. © 2020 Trans Tech Publications Ltd, Switzerland.
On a coupled system of fractional sum-difference equations with p-Laplacian operator
(Springer, 2020) Pimchana Siricharuanun; Saowaluck Chasreechai; Thanin Sitthiwirattham; T. Sitthiwirattham; Mathematics Department, Faculty of Science and Technology, Suan Dusit University, Bangkok, 10300, Thailand; email: thanin_sit@dusit.ac.th
In this paper, we propose a nonlocal fractional sum-difference boundary value problem for a coupled system of fractional sum-difference equations with p-Laplacian operator. The problem contains both RiemannÐLiouville and Caputo fractional difference with five fractional differences and four fractional sums. The existence and uniqueness result of the problem is studied by using the Banach fixed point theorem. © 2020, The Author(s).
Learners' oral corrective feedback perceptions and preferences in Thai as a foreign language tertiary setting; [Yabancõ dil olarak Tay dilini š_renen Ÿniversite š_rencilerin sšzlŸ dŸzeltici geribildirim algõlarõ ve tercihleri]
(Selcuk University, 2020) Watcharapol Wiboolyasarin; Kanokpan Wiboolyasarin; Nattawut Jinowat; W. Wiboolyasarin; Suan Dusit University, Bangkok, Thailand; email: watcharapol_wib@dusit.ac.th
The goal of this research is to investigate the existence of perceptions and preferences among East Asian undergraduate students of Thai. To fill this gap, ninety-nine L2 learners having experience of studying Thai speaking courses at five universities completed an online questionnaire reporting on their recognitions and attitudes. The findings revealed that recast was the most frequently perceived strategy of oral corrective feedback (OCF) that Thai as a foreign language (TFL) students were provided. Explicit correction was the most favoured technique in TFL teaching situations. In a speech, they inclined to be provided with the error correction in private places and would like to be corrected by peers. Considering in terms of the nationalities. An analysis further suggested that some OCF opinions between Chinese and the Korean learners were similar; they tended to prefer clarification request and repetition techniques. In contrast, inattention to error, peer correction, and error correction in public were less preferable among them. © 2020 JLLS and the Authors - Published by JLLS.
Existence results of fractional deltaÐnabla difference equations via mixed boundary conditions
(Springer, 2020) Jiraporn Reunsumrit; Thanin Sitthiwirattham; T. Sitthiwirattham; Mathematics Department, Faculty of Science and Technology, Suan Dusit University, Bangkok, Thailand; email: thanin_sit@dusit.ac.th
In this article, we purpose existence results for a fractional deltaÐnabla difference equations with mixed boundary conditions by using Banach contraction principle and SchauderÕs fixed point theorem. Our problem contains a nonlinear function involving fractional delta and nabla differences. Moreover, our problem contains different orders in four fractional delta differences, four fractional nabla differences, one fractional delta sum, and one fractional nabla sum. Finally, we present some illustrative examples. © 2020, The Author(s).
Existence and multiplicity of positive solutions to a system of fractional difference equations with parameters
(Springer, 2020) Pimchana Siricharuanun; Saowaluck Chasreechai; Thanin Sitthiwirattham; T. Sitthiwirattham; Mathematics Department, Faculty of Science and Technology, Suan Dusit University, Bangkok, 10300, Thailand; email: thanin_sit@dusit.ac.th
We consider a fractional difference-sum boundary problem for a system of fractional difference equations with parameters. Using the Banach fixed point theorem, we prove the existence and uniqueness of solutions. We also prove the existence of at least one and two solutions by using the KrasnoselskiiÕs fixed point theorem for a cone map. Finally, we give some examples to illustrate our results. © 2020, The Author(s).
Synthesis of ZnO/TiO2 spherical particles for blue light screening by ultrasonic spray pyrolysis
(Elsevier Ltd, 2020) Ratanathavorn Wittawat; Rungruang Rittipun; Modsuwan Jarasfah; Bouhoad Nattaporn; R. Wittawat; Faculty of Science and Technology, Suan Dusit University, Bangkok, 228-228/1-3 Sirindhorn Alley, Bang Bumru, Bang Phlat, 10700, Thailand; email: wittawat_rat@dusit.ac.th
A broad UVÐvis absorbance covering the blue visible region was obtained by ultrasonic spray pyrolysis of ZnO/TiO2 spherical particles at pyrolysis temperatures of 400 ¡C, 500 ¡C and 600 ¡C. Zinc nitrate hexahydrate and titanium isopropoxide were used as precursors prepared via mixed solution. The morphology characterization and elemental analysis of the synthesized ZnO/TiO2 spherical particles were carried out by a scanning electron microscope equipped with an energy dispersive X-ray spectrometer and by a transmission electron microscope. The crystal structures were characterized by X-ray diffraction (XRD). UVÐvis absorbance spectra were measured by an ultraviolet-visible-near infrared spectrometer. The synthesized particles were confirmed to be ZnO/TiO2 microspheres. The obtained ZnO structure was indicated by XRD analysis to be wurtzite, and two different TiO2 structures were observed; anatase and rutile. The crystal sizes were estimated from Scherrer's equation and ranged from 33.53 to 39.63 nm for the ZnO crystal, and from 5.78 to 59.2 nm for the two TiO2 crystals. The calculated energy band gap of the synthesized ZnO/TiO2 spherical particles ranged from 3.19 to 3.76 eV. Thus, doping of ZnO with TiO2 promoted visible light absorption, providing a broad UVÐvis absorbance that covers the blue light region more efficiently than commercial ZnO. © 2020 Elsevier Ltd
English Learning Management of Generation Z Learners with Active Learning
(Research and Development Institute Suan Dusit University, 2020) Rattana Klinjuy; R. Klinjuy; Faculty of Humanities and Social Sciences, Suan Dusit University, Lampang Center, Lampang, 52100, Thailand; email: rattana_kli@outlook.com
This article aims to present the guidelines of learning management in an English course that meets the context and satisfies the needs of Generation Z learners with active learning. Active learning is a form of learning by doing. It provides the learners with reading, writing, interacting, and analyzing problems. The learners will be provided with advanced thinking processes such as synthesis, analysis, and evaluation. In this article, the author describes the characteristics and the techniques for learning management, including the benefits of active learning to find the approaches that can be adapted to English teaching and learning. Moreover, the author views active learning as the most suitable teaching method for Generation Z learners. The article shows their learning styles and their needs of learning based on the concept of generational theory for Generation Z learners, linking learning management with active learning. The author, therefore, views that the concept of generational theory enables the instructor to organize an effective active learning process in English to achieve the curriculum learning outcome and also meet the needs of Generation Z learners. © 2020, Research and Development Institute Suan Dusit University. All rights reserved.
On sequential fractional q-Hahn integrodifference equations
(MDPI AG, 2020) Thongchai Dumrongpokaphan; Nichaphat Patanarapeelert; Thanin Sitthiwirattham; N. Patanarapeelert; Department of Mathematics, Faculty of Applied Science, King Mongkut's University of Technology North Bangkok, Bangkok, 10800, Thailand; email: nichaphat.p@sci.kmutnb.ac.th
In this paper, we prove existence and uniqueness results for a fractional sequential fractional q-Hahn integrodifference equation with nonlocal mixed fractional q and fractional Hahn integral boundary condition, which is a new idea that studies q and Hahn calculus simultaneously. © 2020 by the authors.
Existence results of nonlocal Robin boundary value problems for fractional (p, q) -integrodifference equations
(Springer, 2020) Jarunee Soontharanon; Thanin Sitthiwirattham; T. Sitthiwirattham; Mathematics Department, Faculty of Science and Technology, Suan Dusit University, Bangkok, Thailand; email: thanin_sit@dusit.ac.th
The existence results of a fractional (p, q) -integrodifference equation with nonlocal Robin boundary condition are investigated by using BanachÕs and SchauderÕs fixed point theorems. Moreover, we study some properties of (p, q) -integral that will be used as a tool for our calculations. © 2020, The Author(s).
System design of a student relationship management system using the internet of things to collect the digital footprint
(International Journal of Information and Education Technology, 2020) Nualsri Songsom; Prachyanun Nilsook; Panita Wannapiroon; Lance Chun Che Fung; Kok Wai Wong
Information systems plays an important role in the development of many perspectives on the part of higher education institutions, especially in the management of studentsÕ lives. Systems must be accessible and meet the needs of students, and allow higher education institutions to receive accurate and appropriate information. The purpose of this research was to design a system in the form of a student relationship management system (SRMS) using the Internet of Things (IoT) to collect digital footprint. These include the provision of an overview service station for monitoring students, the determination of relevant actors, the IoT process diagram, a sequence diagram and an entity relationship diagram. The results of the evaluation showed an overall very high level of appropriateness and a very high level in terms of the overall appropriateness of the usability of the system. All of the system design aspects for developing the system for collecting the digital footprint of higher education institutions to support student services and student behavior were shown to be appropriate. © 2020 by the authors.
Transport industry as a business infrastructure: Modern stage and prospects of development
(EDP Sciences, 2020) Pakrawee Vanpetch; Anastasia Ostovskaya; A. Ostovskaya; V.I. Vernadsky Crimean Federal University, Simferopol, Academician Vernadsky Avenue, 4, 295007, Russian Federation; email: nastasy.ver@yandex.ua
The condition of the motor transport industry largely defines the progressive socio-economic changes in any country. It also serves a basic index of state development from the perspective of standards of living and healthy environment for economic growth and business activities. The motor transport industry reflects efficiency of the state policy, which also includes effective budget funding of the industry. The most developed countries make a considerable effort to maintain the motor transport system infrastructure and to stimulate development and integration of innovation technologies, which meets the goals of the national economy's sustainable development. Paper analyzes some modern patterns and prospects of transport industry development on the examples of Asia and Russia economical systems. © 2020 The Authors, published by EDP Sciences.
Liposomes Encapsulating Artocarpus lakoocha Roxb. and Glycyrrhiza glabra L. Extracts: Characterization and Shelf Life of Freeze-Dried Vesicles
(Research and Development Institute Suan Dusit University, 2020) Tasanee Panichakul; Piyawan Youdee; Nattaporn Boohuad; Khwunjit Itsarasook; Prasit Suwannalert; T. Panichakul; Department of Cosmetic Science, Faculty of Science and Technology, Suan Dusit University, Bangkok, 10300, Thailand; email: tasanee_p@yahoo.com
Liposome is the one way of encapsulation of extracts for reducing the extract degradation. This study was to prepare the liposome entrapped extracts of Artocarpus lakoocha Roxb. (L-Al), Glycyrrhiza glabra L. (L-Gg) alone and in combination of A. lakoocha and G. glabra extracts (L-AlGg). The liposomes were prepared by Mechanochemical method and freeze-drying. For stability of liposomes, storage at 4, 25 and 45¡C for 8 weeks was performed. The trapping efficiency of liposomes and tyrosinase inhibitory activities of extracts entrapped in liposome were investigated. Results showed liposome morphology was the spherical vesicles evaluated by TEM. Before freeze-drying, liposomes had particle sizes of 156.966 ± 0.808, 140.8 ± 0.818 and 158.633 ± 4.193 nm for L-Al, L-Gg and L-AlGg, respectively. The entrapment efficiency of L-Al, L-Gg and L-AlGg was found to be 95.83 ± 13.48, 97.99 ± 5.23 and 93.90 ± 16.28 %, respectively. The tyrosinase inhibitory activities of released extracts from L-Al, L-Gg and L-AlGg were 81.57 ± 1.22, 68.92 ± 1.23 and 81.40 ± 0.64 %, respectively. After freeze-drying, the particle sizes of L-Al and L-AlGg were no significant changes, while L-Gg particle size was bigger (p < 0.01). The liposome entrapment and tyrosinase inhibitory activity of released extracts were not significantly changed after freeze-drying. This indicates good stability and no extract leakage of liposomes. In storage at 4¡C for 8 weeks, the entrapment efficiency of L-Al, L-Gg, L-AlGg and tyrosinase inhibitory activity of released extracts were not significantly different, comparing with controls. When increasing temperature of storage effected on the significantly reduction of the entrapment of liposomes and the tyrosinase inhibitory activity of released extracts (p < 0.01). Therefore, the freeze-dried liposome and storage at low temperature is recommended for stabilizing liposome and extract quality. © 2020, Research and Development Institute Suan Dusit University. All rights reserved.
On the nonlocal fractional delta-nabla sum boundary value problem for sequential fractional delta-nabla sum-difference equations
(MDPI AG, 2020) Jiraporn Reunsumrit; Thanin Sitthiwirattham; T. Sitthiwirattham; Mathematics Department, Faculty of Science and Technology, Suan Dusit University, Bangkok, 10300, Thailand; email: thanin_sit@dusit.ac.th
In this paper, we propose sequential fractional delta-nabla sum-difference equations with nonlocal fractional delta-nabla sum boundary conditions. The Banach contraction principle and the Schauder's fixed point theorem are used to prove the existence and uniqueness results of the problem. The different orders in one fractional delta differences, one fractional nabla differences, two fractional delta sum, and two fractional nabla sum are considered. Finally, we present an illustrative example. © 2020 by the authors.
Preliminary ions removal from synthetic iron solution by zeolite and perlite via xrf technique
(Trans Tech Publications Ltd, 2020) Kronnika Saetan; Chaisiri Kitpaosong; Siwawit Buasuwan; Rapeephun Dangtungee; R. Dangtungee; Department of Mechanical and Process Engineering (MEPE), The Sirindhorn International Thai-German Graduate School of Engineering (TGGS), King MongkutÕs University of Technology North Bangkok (KMUTNB), Bangkok, 1518 Wongsawang, Bangsue, 10800, Thailand; email: rapeephun.d@tggs.kmutnb.ac.th; R. Dangtungee; Natural Composite Research Group (NCR), MEPE, TGGS, KMUTNB, Thailand; email: rapeephun.d@tggs.kmutnb.ac.th; R. Dangtungee; Research Center of Innovative Rubber (RIR), Science and Technology Research Institute (STRI), KMUTNB, Thailand; email: rapeephun.d@tggs.kmutnb.ac.th; R. Dangtungee; Researh Center of Nano Industries and Bio-plastics (NBP), KMUTNB, Thailand; email: rapeephun.d@tggs.kmutnb.ac.th
Ion removal is a long problem on natural freshwater resources. In order to modify the adsorption performance to remove ions from synthetic iron solution, natural zeolite and natural perlite were treated with deionized water (DI water) as D-zeolite and D-perlite. And, 1M sulphuric acid (H2SO4) was used to treat the adsorbent as H-zeolite and H-perlite. The capability of ion removal was preliminarily investigated from the reduction of iron in solution by X-ray fluorescence spectrometer. The result showed that treatment of adsorbents with DI water was more capability than 1M H2SO4 solution. © 2020 Trans Tech Publications Ltd, Switzerland.
On nonlinear fractional difference equation with delay and impulses
(MDPI AG, 2020) Rujira Ouncharoen; Saowaluck Chasreechai; Thanin Sitthiwirattham; S. Chasreechai; Department of Mathematics, King Mongkut's University of Technology North Bangkok, Bangkok, 10800, Thailand; email: saowaluck.c@sci.kmutnb.ac.th; T. Sitthiwirattham; Mathematics Department, Suan Dusit University, Bangkok, 10300, Thailand; email: thanin_sit@dusit.ac.th
In this paper, we establish the existence results for a nonlinear fractional difference equation with delay and impulses. The Banach and Schauder's fixed point theorems are employed as tools to study the existence of its solutions. We obtain the theorems showing the conditions for existence results. Finally, we provide an example to show the applicability of our results. © 2020 by the authors.
Effect of mixture ratio of food waste and vetiver grass on biogas production
(Chulalongkorn University - Environmental Research Institute, 2020) Mayura Srikanlayanukul; Parinda Suksabye; M. Srikanlayanukul; Faculty of Science, Maejo University, Chiang Mai, Thailand; email: mayura@mju.ac.th
The objectives of this research were to study the optimum percentage ratios of food waste and vetiver grass (Vetiveria zizaniodes (L.) Nash) for biogas production and process stability in anaerobic digestion system. The nine mixture ratios of food waste (FM) and vetiver grass (VG) were 100:0, 80:20, 75:25, 66.67:33.33, 50:50, 33.33:66.67, 25:75, 20:80 and 0:100. The biogas production was subjected to anaerobic batch with working volume of 1.8 L and had digestion time 60 d at 35 ± 2 ¡C. High specific methane yield of 0.30 L g-1 VS removed was obtained from the fermentation at ratio of FW:VG at 80:20 with C/N ratio of 28.20. The specific methane yield of the single digestion of food waste (100:0) and single digestion of vetiver grass (0:100) were only 0.18 and 0.11 L g-1 VS removed, respectively. It was found that the cumulative methane production of FW: VG ratio of 80:20 was increased 34.89% and 96.93% compared to single substrate of food waste and vetiver grass, respectively. The results also showed the highest COD, VS and TS removal with a percentage ratio of FW: VG at 80:20, while the single vetiver grass digestion was the lowest COD, VS and TS removal. VFAs/Total alkalinity ratio of all ratio of food waste to vetiver at digestion time 40 d remained in 0.0895±0.0007 to 0.1944±0.0027 were steadied for this digester. It can be concluded that co-digestion of food waste and vetiver improve the biogas yield and degradation efficiency. © 2020, Chulalongkorn University - Environmental Research Institute. All rights reserved.
Small rna interference inhibition of ubiquitin-specific protease 14 gene expression in intrahepatic cholangiocarcinoma primary cells
(SEAMEO TROPMED Network, 2020) Ubol Chuensumran; Tasanee Panichakul; Thun Ingkakul; Poom Adisakwattana; U. Chuensumran; Department of Food Processing Technology, School of Culinary Arts, Suan Dusit University, Bangkok, 10300, Thailand; email: ubol_chu@dusit.ac.th
Studies on genomic instabilities of intrahepatic cholangiocarcinoma (ICC) from Thai patients have shown 52% variations in a specific region of ubiquitin-specific protease 14 gene (USP14) located on 18p11.32. Inhibition of USP14 expression in three different primary cells cultured from resected ICC tissues by transfecting with double-strand RNA interference targeting exon 16 region of USP14 mRNA resulted in 6-50% reduction in mRNA levels, with cells with low USP14 expression being more affected. These findings lend support to a potential in developing strategies against USP14 in ICC. © 2020, SEAMEO TROPMED Network. All rights reserved.
Promoting Physical Activity among Buddhist Monks: The Role of Nurse
(Research and Development Institute Suan Dusit University, 2020) Wiwat Laochai; Doungnetre Thummakul; Nongluck Jiraprapapong; D. Thummakul; Faculty of Nursing, Suan Dusit University, Bangkok, 10300, Thailand; email: doungnetre_thu@dusit.ac.th
Buddhist monks suffer from chronic illnesses that could be prevented or delayed if they engaged in proper physical activity. Because a monkÕs lifestyle differs from a normal Buddhist, physical activity maybe neglected. Physical activity is usage of energy by using muscles in various parts of the body. If the body does not completely metabolize excess fat, it will result in accumulation of fat. Nurses have an important role in promoting physical activity among Buddhist monks, which will result in better health for monks, prevention of complications of diseases and reduce risk of noncommunicable diseases (NCDs) such as diabetes, hypertension, chronic kidney disease, hyperlipidemia, obesity, heart disease, cancer and osteoporosis, which is usually caused by monksÕ lack of physical activity. Buddhist monks have religious disciplines and duties that make their life style differ from normal citizens. This article shows the role of nurses in promoting physical activity among Buddhist monks that doesnÕt go against monksÕ discipline; consisting of evaluation of physical activity using Global physical activity questionnaire, International physical activity questionnaire, calculation of energy usage (Metabolic Equivalent: MET), different ways for monks to exercise such as fast walking, Taichi-Qigong, Yoga and concentration activity, including the spread of awareness to monks and nurses to support and design physical activity program that is adequate and suitable for monks. If nurses become more active and emphasize this topic more, there will be more projects and programs that promotes physical activities among monks to improve monksÕ physical well-being. © 2020, Research and Development Institute Suan Dusit University. All rights reserved.
Antioxidant Activity and Allelopathic Potential of Lippia nodiflora (L.) Michx on Germination and Growth of Neptunia javanica Miq. seeds
(Research and Development Institute Suan Dusit University, 2020) Wipa Tupchiangmai; Wantana Mongkolvisut; W. Tupchiangmai; Department of Chemical Technology, Faculty of Science and Technology, Suan Dusit University, Bangkok, 10300, Thailand; email: wipa_tup@dusit.ac.th
The research objective was to evaluate the antioxidant activity, the allelopathic potential on germination growth of Neptunia javanica Miq. seeds and the total phenolic content (TPC) of crude extracts and fractions from Lippia nodiflora (L.) Michx. In this research, the ethanol crude extracts of leaves (LE), stems (SE) and roots (RE) from L. nodiflora were subjected to study the antioxidant activity by using DPPH free radical scavenging assay and the allelopathic potential on germination seeds of N. javanica. The RE extract had the highest antioxidant activity with IC50 value of 136.87 ppm. The allelopathic effect of LE extract at a concentration of 20 mg/mL completely inhibited the seed germination of N. javanica. The LE fractions were separated by liquid-liquid partition with hexane and ethyl acetate system to afford the leaf hexane fraction (LH), leaf ethyl acetate fraction (LEtOAc) and leaf hydroethanolic fraction (LW). The antioxidant, TPC and allelopathic activities of all fractions were investigated. The antioxidant activity of LW (158.21) and LEtOAc (175.45) fractions were better than those of LE (296.87) extracts, while LH fraction showed the lowest antioxidant activity at 722.08 ppm. The active allelopathic compounds in LEtOAc at a concentration of 10 mg/mL showed complete inhibition of radicle and hypocotyl on germination seed growth and 50% of seed growth inhibition (IC50) was 3.14 mg/mL. Crude extracts and fractions showed more inhibited radicle growth than hypocotyl growth of N. javanica seeds. The TPC of leaves crude extracts and fractions were the highest. Interestingly, the total phenolic content of LEtOAc fraction, was the highest (0.072 mg GAE/g) that was related to the good allelopathic properties, compared with other fractions and crude extracts. Our results indicate that the ethanolic crude extracts and an ethyl acetate fraction of L. nodiflora leaves can be applied to weed control, especially for N. javanica. © 2020, Research and Development Institute Suan Dusit University. All rights reserved.

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