Journal of Science and Technology Phetchabun Rajabhat University 2025
Volume 5 Issue 2 July-December (2025)

วารสารวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยราชภัฏเพชรบูรณ์ ปี 2568
ปีที่ 5 ฉบับที่ 2 กรกฎาคม-ธันวาคม (2568)

Published: 2025-11-20

Research articles

Preparation of activated carbon from agricultural waste hemp stalks using pyrolysis and microwave activation processes for the removal of methyl red dye

Thanakorn Keeriang, Artit Hutem, Piyarut Moonsri

1-12

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On the Diophantine equation 3^x-2.5^y=z^2

Jirapong Mavongsa, Suton Tadee

13-18

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Beef Cattle Production Efficiency Improvement Through Different Breeding Program in Khao Kor and Bueng Sam Phan District, Phetchabun Province

Piphat Chanartaeparporn, Janjira Tohkwankaew, Chalermpan Tantara

19-27

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Geographic Information System for Managing Natural and Historical Tourism in Sara Buri Province

Kwanchai Chai-udom, Atitaya Sodanil, Chonthicha Sodanil

28-38

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Numerical Analysis and Experimentation of an AC Voltage Regulator for Spot Welding Machine

Jirasak Songbunkaew , Ekkapol Tubpond, Piyada Phosri, Chamonwut Tamnanchit, Waraporn Summart

39-52

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Effects of Marigold Crude Extract Supplementation in Diets on Body and Caudal Fin Coloration Intensity in Siamese Fighting Fish (Betta splendens)

Porntip Thapiang, Namfa Yodpa, Sitthichon Rattanachan, Supaporn Udomsup, Siddhiwasan Dolwongchantong, Kanana Ardsungnearn

53-63

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The Use of Clove and Galangal Medicinal Plant Extracts to Control Fungi from Rotten Peanut Pods, Nikhom Sang Ton Eng Subdistrict, Mueang District, Lopburi Province

Duangjai Boonkusol, Sukunya Payungsin

64-72

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Adsorption of copper from synthetic wastewater using water hyacinth roots and stems modified with chitosan

Preecha Panya, Suphattra Rachcharit

ึ73-83

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Effect of Black Soldier Fly (Hermetia illucens) larvae Levels in feed to Increase Efficiency Growth rate of Nile Tilapia Fry (Oreochromis niloticus)

Worrapornpat Patpai, Saifon Thodthasi, Witchuda Yindee, Kanokkarn Reebreangrum, Chainarin Tubmarerng, Krikanok Phabu, Kittisak Ruampattana

84-96

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The Study of Cannabidiol and D9-Tetrahydrocannabinol in The Medical Cannabis Strain R1

Piyaporn Srisom, Kittisak Sangsrichan

97-105

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