Physicochemical and antifungal properties of pyroligneous acid derived from macadamia nutshell and its application

Name: Chaisang Tamang

keyword: Macadamia Nutshell

ThaSH: Distillation

Classification :.DDC: e-Theses

; Nam Dok Mai Sithong

ThaSH: Macadamia nut -- 309695

ThaSH: Wood vinegar -- 309696

ThaSH: Pyrolysis

ThaSH: Chemical processes

ThaSH: Antifungal agents

Abstract: Pyroligneous acid (PA), resulting from the pyrolysis of lignocellulosic bio-masses, exhibits antioxidant, antimicrobial and insecticidal property. This study explores the physicochemical properties and antimicrobial efficacy of PA derived from macadamia nutshell (MNS). A comparative analysis between distillation-refined and naturally-refined PA was tested. Distillation-refined PA exhibited superior qualities, with a lower pH (2.65), higher total phenolic content (138.70 mg GAE/mL), and antioxidant capacity with IC50 value 7.27 mg mL-1) and stronger reducing power with 132.09 gM FeSO4/100mL compared to naturally-refined PA. In-vitro analysis demonstrated significant inhibition of Colletotrichum sps. mycelial growth at various PA concentrations, surpassing the fungicide Carbendazim. While 0.5% and 1% PA showed moderate inhibitory effects, higher concentrations were needed for complete inhibition of Lasiodiplodia theobromae and Aspergillus niger mycelium. Storage assessment of ‘Nam Dok Mai Sithong’ mangoes reveal that PA (1.5%) combined with chitosan (1%) effectively maintains quality parameters over 20 days, with reduced disease incidence and severity. The combined treatment also exhibited the lowest disease incidence and severity scores. This comprehensive investigation underscores the potential of distillation-refined MNS-derived PA as a promising antimicrobial agent for mango preservation during storage.

Mae Fah Luang University. Learning Resources and Educational Media Center

Address: CHIANG RAI

Email: library@mfu.ac.th

Name: Matchima Naradisorn

Role: Advisor

Created: 2023

Modified: 2024-07-11

Issued: 2024-07-11

วิทยานิพนธ์/Thesis

application/pdf

CallNumber: e-Theses

eng

DegreeName: Master of Science

Level: Master's Degree

Descipline: Postharvest Technology and Innovation

Grantor: Mae Fah Luang University

©copyrights Mae Fah Luang University

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