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All Journal JTSL (Jurnal Tanah dan Sumberdaya Lahan) Indonesian Green Technology Journal The Journal of Pure and Applied Chemistry Research
Diah Mardiana
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Engineering Environmental Science Materials Science & Nanotechnology Medicine & Pharmacology Other

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 1 
Formulation and Physicochemical Properties of Kaffir Lime Oil-in-Water Beverage Emulsions and Antibacterial Test Vincentius Johar Windrayan Pambudi; Elvina Dhiaul Iftitah; Diah Mardiana
The Indonesian Green Technology Journal Vol 11, No 1 (2022)
Publisher : Program Pascasarjana Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Abstract Essential oil inside beverage emulsion became an interesting subject to get a new value for the fast-moving customer goods (FMCG) market. In this study, kaffir lime oil (KFO) antibacterial test on formulation and physicochemical properties of kaffir lime oil in water beverage emulsions was investigated. The main ingredients of beverage emulsions are water, high fructose corn syrup (HFCS), Arabic gum as an emulsifier, vitamin E, and kaffir lime oil as flavoring and antibacterial. KFO composition used instrument with Stability of oil-in-water emulsion was observed by measuring physicochemical properties: turbidity, alkalinity, and conductivity. GC-MS characterization on kaffir lime essential oils revealed the top three components, i.e., citronella (46,47%), citronellol (12,22%), and citronellyl acetate (6,48%). FT-IR KFO spectrum had absorbance at 1726 (C=O stretching), 2922, and 2874 cm-1 (C-H stretching from aldehyde). Absorbance was also present on 1454 and 1379 cm-1 (C=C stretching) wavelengths, resembling citronella. Gum arabic with R−S(=O)₂−OH  group addition reduced pH value to 1.1 on each composition addition and increased conductivity by 317.3 μS/cm. Fructose addition reduced the value by 153.4 μS/cm. Turbidity value increased averagely by 46,9 NTU, then reduced by 14,4 NTU. Citronellal in KFO could hinder e-coli bacterial growth and had an alt value >72 CFU/mL. This formulation study produces a beverage product with pH, conductivity, and turbidity values following the standard and has criteria under the microbiological contamination limit of BPOM and SNI standards. Keywords: emulsified beverage, kaffir lime oil, physicochemical properties, stability, perception
PENGARUH BIOCHAR SERBUK KAYU DURIAN TERHADAP KARAKTERISTIK TANAH SULFAT MASAM DALAM MENGURANGI EMISI GAS METANA Evy Setiawati; Sugeng Prijono; Diah Mardiana; S Soemarno
Jurnal Tanah dan Sumberdaya Lahan Vol. 6 No. 2 (2019)
Publisher : Departemen Tanah, Fakultas Pertanian, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (253.824 KB) | DOI: 10.21776/ub.jtsl.2019.006.2.6

Abstract

Organic matter in the soil can provide nutrients to plants. The objectives of this study were to analyze soil characteristics after incubation using biochar at various doses, and to calculate the reduction of methane gas emissions from incubated soils. The treatments were (1) soil control (T0); (2) 4 t ha-1 biochar + soil (T1); (3) 8 t ha-1 biochar + soil (T2); (4) 12 t ha-1 biochar + soil (T3); (5) 16 t ha-1 biochar + soil (T4); (6) 20 t ha-1 biochar + soil (T5). The soil of each treatment was incubated for 30, 60, and 90 days. Observations were made on pH, exchangeable cations (Ca, Mg, K, Na) and cation exchange capacity (CEC). Methane gas emissions were measured at 30, 60, and 90 days after planting. The percentage increase in incubation soil pH for 30 days was 3.13-48.71%, 60 days was 3.06-21.26%, and 90 days was 0.41-28.26%. CEC also increased from 28.83 to 37.46 me 100 g-1 (29.95%) at 30 days, 27.63-36.16 me 100 g-1 (30.86%) at 60 days, and 26.07-35.01 me 100 g-1 (34.28%) at 90 days. Exchangeable Ca, and Mg was not significantly different for all biochar doses and incubation times. The reduction in methane gas emissions ranged from 9.57-18.08% (30 days); 33.13-35.23% (60 days); and 46.08-73.25% (90 days).
Physicochemical Properties and Antibacterial Activity of Kaffir Lime Oil Emulsion Applicable to Baverage Product Vincentius Johar Windrayan Pambudi; Elvina Dhiaul Iftitah; Diah Mardiana
The Indonesian Green Technology Journal Vol. 11 No. 1 (2022)
Publisher : Postgraduate School Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.igtj.2022.011.01.02

Abstract

Essential oil inside beverage emulsion became an interesting subject to get a new value for the fast-moving customer goods (FMCG) market. In this study, kaffir lime oil (KFO) antibacterial test on formulation and physicochemical properties of kaffir lime oil in water beverage emulsions was investigated. The main ingredients of beverage emulsions are water, high fructose corn syrup (HFCS), Arabic gum as an emulsifier, vitamin E, and kaffir lime oil as flavoring and antibacterial. KFO composition used instrument with Stability of oil-in-water emulsion was observed by measuring physicochemical properties: turbidity, alkalinity, and conductivity. GC-MS characterization on kaffir lime essential oils revealed the top three components, i.e., citronella (46,47%), citronellol (12,22%), and citronellyl acetate (6,48%). FT-IR KFO spectrum had absorbance at 1726 (C=O stretching), 2922, and 2874 cm-1 (C-H stretching from aldehyde). Absorbance was also present on 1454 and 1379 cm-1 (C=C stretching) wavelengths, resembling citronella. Gum arabic with R−S(=O)₂−OH  group addition reduced pH value to 1.1 on each composition addition and increased conductivity by 317.3 μS/cm. Fructose addition reduced the value by 153.4 μS/cm. Turbidity value increased averagely by 46,9 NTU, then reduced by 14,4 NTU. Citronellal in KFO could hinder e-coli bacterial growth and had an alt value >72 CFU/mL. This formulation study produces a beverage product with pH, conductivity, and turbidity values following the standard and has criteria under the microbiological contamination limit of BPOM and SNI standards. Keywords: emulsified beverage, kaffir lime oil, physicochemical properties, stability, perception
The Effect of Surfactant on the Characteristics of Curcumin-Loaded Nanostructured Lipid Carriers: Fluorescence and Stability Study Mega Nurul Madania; Zubaidah Ningsih; Anastasia Fitria Devi; Diah Mardiana; Ulfa Andayani
The Journal of Pure and Applied Chemistry Research Vol. 14 No. 1 (2025): Edition January-April 2025
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2025.014.01.7933

Abstract

Curcumin, a bioactive compound derived from Curcuma longa, offers significant pharmacological benefits such as antioxidant, anti-inflammatory, and anticancer properties. However, its therapeutic application is restricted due to poor water solubility, low systemic bioavailability, and limited skin penetration. This study explores the use of Nanostructured Lipid Carriers (NLCs) as a drug delivery system to improve curcumin's stability and permeability. Two formulations were developed: NLC-KUR-T80, which encapsulates curcumin using the non-ionic surfactant Tween 80, and NLC-KUR-CTAB, which uses the cationic surfactant CTAB. Both formulations were prepared using the Phase Inversion Temperature (PIT) method and characterized for particle size, polydispersity index (PI), zeta potential, encapsulation efficiency (EE%), and fluorescence properties. Results revealed that CUR-NLC-CTAB exhibited a larger particle size (1410 ± 183 nm), higher zeta potential (78.70 ± 0.67 mV), and significantly better encapsulation efficiency (27.33 ± 3.33%) compared to CUR-NLC-T80. Fluorescence studies demonstrated that curcumin within NLC-CTAB had enhanced fluorescence intensity, indicating better stability and distribution within the lipid matrix.
Characterization of Ca-Alginate-Gelatin Waste Beads Salistya, Sarahita Dinda; Ellya Indahyanti; Diah Mardiana; Zubaidah Ningsih
The Journal of Pure and Applied Chemistry Research Vol. 14 No. 2 (2025): Edition May-August 2025
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/

Abstract

The rapid growth of industry in Indonesia is partly driven by the emergence of new sectors such as the pharmaceutical industry. This sector has experienced a surge in the production of various types of medical capsules, with shells made from gelatin, colorants, and other components. As capsule production increases, so does the amount of gelatin waste was generated. In this study, beads were manufactured using an extrusion technique with 0.1 M CaCl2 to induce cross-linking. The ratio of alginate to gelatin waste was varied to determine the stability of the beads. The stability of the beads was observed over seven days, and the optimal composition was found to be 1:1. From the results of the TGA/DTA characterization, thermal analysis revealed that the combination of gelatin waste and sodium alginate improved its material properties. SEM results show that the Ca-Alginate-Gelatin waste beads contained alginate network, resulting in a porous structure and amorphous shape. Based on these finding, the beads produced have the potential to serve as adsorbents for use in slowed release fertilizers.
Co-Authors Anastasia Fitria Devi Ellya Indahyanti Elvina Dhiaul Iftitah Evy Setiawati Mega Nurul Madania S Soemarno Salistya, Sarahita Dinda Sugeng Prijono Ulfa Andayani Vincentius Johar Windrayan Pambudi Zubaidah Ningsih