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All Journal VALENSI Jurnal Penelitian Saintek Bioma : Berkala Ilmiah Biologi SAINS DAN MATEMATIKA JURNAL KIMIA SAINS DAN APLIKASI Alchemy Jurnal Penelitian Kimia INDONESIAN JOURNAL OF PHARMACY Alotrop Jurnal Pendidikan dan Ilmu Kimia Molekul: Jurnal Ilmiah Kimia Greensphere: Journal of Environmental Chemistry
Purbowatiningrum Ria Sarjono
Chemistry Department, Faculty Of Sciences And Mathematics, Diponegoro University, Jl. Prof. Soedarto, SH., Tembalang, Semarang|Diponegoro University|Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Education Energy Engineering Environmental Science Materials Science & Nanotechnology Mathematics Medicine & Pharmacology

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Isolation of endophytic bacteria from soursop leaf (Annona muricata) and secondary antioxidant metabolite activity testing Sarjono, Purbowatiningrum Ria
Jurnal Penelitian Saintek Vol 28, No 1 (2023)
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jps.v1i1.57799

Abstract

Free radicals are molecules or molecular fragments that contain unpaired electrons in the valence shell. To achieve stability, free radical molecules will react with surrounding molecules. Free radical molecules in the body take place continuously and are difficult to stop, this can cause diseases such as premature aging and cancer. Therefore, the required compound has antioxidant activity to stop it. One of the antioxidant compounds can be obtained by utilizing secondary metabolites of Soursop leaf endophytic bacteria (Annona muricata). Soursop leaf endophytic bacteria isolates have been obtained which have the form of diplobacillus and include gram-positive bacteria. The activity was carried out using the DPPH method and obtained IC50 of 278.27 ppm at the 22nd hour and 61.942 ppm at the 24th hour. The total phenolic obtained at the 22nd hour was 79 mgek of gallic acid/g while at the 24th hour it was 34 mgek of gallic acid/g. Secondary metabolites of soursop leaf endophytic bacteria produce secondary metabolites in the form of alkaloids and terpenoids.
Total Phenolic Content Analysis, Antioxidant Activity, and Isolation of Phenolic Acid Compounds from Methanol Extract of Celery (Apium graveolens L.) Hanum, Rahma Farida; Fachriyah, Enny; Ismiyarto, Ismiyarto; Sarjono, Purbowatiningrum Ria
Jurnal Kimia Sains dan Aplikasi Vol 28, No 7 (2025): Volume 28 Issue 7 Year 2025
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.28.7.345-354

Abstract

Celery (Apium graveolens L.), a member of the Apiaceae family, is rich in bioactive compounds and exhibits various health benefits, including antihypertensive, antibacterial, anti-inflammatory, and antioxidant activities. The presence of diverse phenolic acids, as identified in previous studies, prompted this research to analyze the total phenolic content, evaluate antioxidant activity, and isolate phenolic acids from the methanol extract of celery. The study involved phytochemical screening, maceration extraction, determination of total phenolics using the Folin–Ciocalteu method, antioxidant testing via the DPPH method, and phenolic acid isolation using three approaches: base hydrolysis (HB), acid hydrolysis (HA), and non-hydrolysis (TH). The isolates were analyzed using UV–Vis spectrophotometry, CMS, and LC/MS-MS QTOF. The methanol extract of celery yielded 16.59% and was found to contain flavonoids, phenolic acids, saponins, tannins, and steroids. The total phenolic content was 17.268 ± 0.057 mg GAE/g extract, while the IC50 value was 1712.782 ± 0.115 mg/L, indicating very weak antioxidant activity. Isolation of phenolic acids revealed that the HA fraction contained pyrogallol and caffeic acid. This was supported by the A3 band (λmax 230 nm and 269 nm) with a molecular weight of 126 m/z, characteristic of pyrogallol. The A4 band (λmax 218, 242, 298, and 325 nm) with a molecular weight of 180.0387 m/z was characteristic of caffeic acid.
Isolation of Endophytic Pseudomonas Strains from Papaya Leaves and Their Extracellular Enzyme Production and Antioxidant Profile Sarjono, Purbowatiningrum Ria; Choirunnisa, Nur Fadilla; Triwijayanti, Yunita; Salsabila, Salsabila; Asy’ari, Mukhammad; Ngadiwiyana, Ngadiwiyana; Ismiyarto, Ismiyarto; Prasetya, Nor Basid Adiwibowo; Andriani, Yosie
Jurnal Kimia Valensi Jurnal Kimia VALENSI, Volume 11, No. 1, May 2025
Publisher : Department of Chemistry, Faculty of Science and Technology Syarif Hidayatullah Jakarta State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v11i1.40921

Abstract

Endophytic bacteria, symbiotic microorganisms residing in plant tissues, produce bioactive compounds similar to host plants, such as antioxidants. These antioxidants are crucial in combating free radicals linked to degenerative diseases. This study isolates and characterizes two endophytic bacterial strains from papaya leaves, exploring their enzymatic and antioxidant activities. Two isolates of endophytic bacteria from papaya leaves were obtained, F1-A and F1-B. F1-A endophytic bacteria are types of monobacilli, Gram-positive bacteria. F1-B endophytic bacteria are types of Bacilli. Using 16S rRNA analysis, both isolates were predicted to belong to the Pseudomonas bacterial strain. Research on optimizing their growth under various temperatures and pH conditions showed that both isolates grow best at 37°C. F1-B provides a better opportunity as a source of industrial enzymes because it can excrete amylase, urease, cellulose, and protease enzymes compared to F1-A, which can only produce amylase and protease enzymes. Nevertheless, F1-A can act as a potent antioxidant with an IC50 of 34.18 ppm compared to F1-B, which has an IC50 value of 292.31 ppm. The IC50 value of the F1-A isolate was not much different from the IC50 of quercetin, which was 12.50 ppm. The ability of F1-A as an antioxidant is also influenced by the results of phytochemical screening, which can contain more secondary metabolites than F1-B. These results highlight the potential of Pseudomonas strains as sources of industrial enzymes and natural antioxidants, warranting further investigation.
Synthesis and Antibacterial Activity of Chitosan-Cinamaldehyde/AgNp Schiff Base Composite Huda, Muhammad Badrul; Rinaryadi, Kemilau Permata Hati; Ngadiwiyana, Ngadiwiyana; Christwardana, Marcelinus; Sarjono, Purbowatiningrum Ria; Ismiyarto, Ismiyarto
Jurnal Kimia Valensi Jurnal Kimia VALENSI, Volume 11, No. 1, May 2025
Publisher : Department of Chemistry, Faculty of Science and Technology Syarif Hidayatullah Jakarta State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v11i1.45121

Abstract

Chitosan is a material that has antibacterial properties. Chitosan was modified with cinnamaldehyde to form chitosan Schiff base, which acts as a capping agent in the synthesis of silver nanoparticles. The Schiff base product was modified again into a silver nanoparticle Schiff base composite to improve its ability as a capping agent and improve its antibacterial properties. This study aims to synthesize a chitosan-cinnamaldehyde/AgNP Schiff base composite (CCSB/AgNP) as an active ingredient with excellent antibacterial properties. The first stage was the synthesis of a chitosan-cinnamaldehyde Schiff base. In the second stage, the synthesis of the chitosan/AgNP composite was carried out by adding STPP with sonication and a water bath. The third stage involved synthesizing of the CCSB/AgNP composite using the same method as the second stage employing both heating and non-heating as well as sonication and non-sonication. The product was characterized using a UV-Vis spectrophotometer, FT-IR, SEM-EDX, mapping, and AAS. Antibacterial tests were performed on the synthesized product using the Total Plate Count (TPC) method. Chitosan has a molecular weight of 338080 g/mol and a degree of deacetylation of 65.09%. The Schiff base product of chitosan-cinnamaldehyde is a brownish-yellow solid with a yield of 76.9% (w/w) and a degree of substitution of 87.02%. The presence of Ag was confirmed by EDX mapping, which revealed mass percentages of 0.26%, 1.00%, and 3.97% for C/AgNP-1, C/AgNP-2, and CCSB/AgNP-2, respectively. The chitosan/AgNP product has a yield of 97% (w/w) and an SPR effect at 439 nm. The synthesis of CCSB/AgNP obtained a dark green solid with a yield of 87% (w/w) and an SPR effect at 433 nm. The antibacterial activity test yielded the highest percentage reduction in the number of bacteria in CCSB/AgNP at 3 days of observation at 95.1%, and 7 days at 94.1%. 
Synthesis of Antibacterial Coating Film Based on Eugenol-Allyl Eugenol Copolymer with Chitosan-Gelatin Ngadiwiyana, Ngadiwiyana; Dzahabiyyah, Hana Putri; Ismiyarto, Ismiyarto; Sarjono, Purbowatiningrum Ria
Jurnal Kimia Valensi Jurnal Kimia VALENSI, Volume 10, No. 2, November 2024
Publisher : Department of Chemistry, Faculty of Science and Technology Syarif Hidayatullah Jakarta State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v10i2.40944

Abstract

The development of coating film materials based on biopolymers and active antibacterial compounds has attracted attention in the food industries. Food packaging biopolymers can be increased antibacterial properties by adding compound modification of natural ingredients such as eugenol-allyl eugenol copolymer (PEAE). The aims of this study were to synthesize a coating film based on chitosan-gelatin with PEAE and test its antibacterial properties. PEAE synthesis was carried out by polymelirization reaction with the (BF3O(C2H5)2) as catalyst and characterized by FTIR, molecular weight, and solubility. Synthesis of chitosan-gelatin coating films with variations in PEAE concentration of 1.25%, 2.5%, and 3.75% and characterization includes FTIR, SEM, TS, E%, and contact angle. Antibacterial activity is carried out by the turbidimetry method. PEAE was synthesized with the results in the form of brown solids with 94.91% yield, molecular weight of 9,553.98 da, and the melting point of 95-98 °C. Chitosan-Gelatin films with the addition of PEAE produce a thin yellowish film, with a sequential decreased tensile strength, and the percentage value of extension increases with the increase in PEAE concentration. The best antibacterial activity in the film PEAE 2.5, with the percentage of inhibition of Staphylococcus aureus and Escherichia coli of 99.71% and 98.39% respectively.
Co-Authors Afiina Putri Monita Agus Subagio Agustina L. N. Aminin Agustina L.N. Aminin Annisa Nur Aini Annisa Rachma Asy'ari, Mukhammad Asy’ari, Mukhammad Aulia Anggraeni Aulia Anggraeni Budi Putri Ayu Choirunnisa, Nur Fadilla Damar Nurwahyu Bima Desy Fitrya Syamsumir Dewi Kusrini Dewi Nuritasari Dini Kurnia Wisatya Dwi Hudiyanti Dwi Susilo Dyah Iswantini Dzahabiyyah, Hana Putri Enny Fachriyah Enny Fachriyah Enny Fachriyah Enny Fachriyah Enny Fachriyah Enny Fachriyah Hafizdah Fadillah Hanum, Rahma Farida Hasim - Hendra Dwipa Rifky Mahardika Huda, Muhammad Badrul Ifan Bagus Haryanto Ifsantin Nihaya Ina Noprastika Ismiyarta Ismiyarta Ismiyarto Ismitarto Ismiyarto Ismiyarto Ismiyarto Ismiyarto Ismiyarto Ismiyarto Ismiyarto Ismiyarto Ismiyarto Ismiyarto Ismiyarto Ismiyarto Khikmah Khikmah Kunti Nadiyatan S. Muthia Laksmitasari, Nuraini Dwi Liswinda Zafirah Rahmatia Lolyta Sari Br Tampubolon Mahreta Suhartanti Marcelinus Christwardana Maulida Indriyaning Ratri Melly Wahyuningsih Moch Syaiful Alam Moh. Mulyadi Mohamad Syahmie Samsudin Mukhammad Asy’ari Mukhammad Asy’ari Mumtazati, Qonita Ngadiwiyana M.Si. S.Si. Ngadiwiyana Ngadiwiyana Ngadiwiyana Ngadiwiyana Ngadiwiyana Ngadiwiyana Nies S Mulyani Nies S. Mulyani Nies Suci Mulyani Nies Suci Mulyani Niken Windi Saputri Noor Basid Adiwibawa Prasetya Nor Basid Adiwibawa Prasetya Nor Basid Adiwibawa Prasetya Nor Basid Adiwibawa Prasetya Nor Basid Adiwibawa Prasetya Nor Basid AP Nor Basyid A. Prasetya Nur Amaliyah Okky Triana Pandelaki, Elmi Christi Julia Rahmad Budiharjo Rinaryadi, Kemilau Permata Hati Salsabila, Salsabila Sandi Sutopo Aribowo Sesika Novari Sofiana Nur Aziiza Sulasiyah Sulasiyah Sumardjo, Damin Sumariyah Sumariyah Suyanti Suyanti Syahnindita Dyah Ajeng Wartari Triwijayanti, Yunita Wati, Mei Riska Wirnia S Setyani Wirnia Sinar Setyani Wuryanti Wuryanti Wuryanti Wuryanti Yanidya Tanjihah Ardiansyah Yosie Andriani Yosie Andriani Yuga Pratama