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All Journal Jurnal Teknologi Dan Industri Pangan EKSAKTA: Journal of Sciences and Data Analysis JURNAL KIMIA SAINS DAN APLIKASI Pharmaciana: Jurnal Kefarmasian Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Indonesian Journal of Cancer Chemoprevention Eksergi: Chemical Engineering Journal Jurnal Rekayasa Sipil dan Desain Jurnal Kimia dan Kemasan agriTECH Agrokreatif Jurnal Ilmiah Pengabdian kepada Masyarakat Majalah Obat Tradisional EduChemia: Jurnal Kimia dan Pendidikan Jurnal Kimia Riset Dental Journal (Majalah Kedokteran Gigi) Jurnal Bioteknologi & Biosains Indonesia (JBBI) Titian Ilmu: Jurnal Ilmiah Multi Sciences ALCHEMY Jurnal Penelitian Kimia Indonesian Journal of Chemistry Jurnal Aplikasi Teknologi Pangan Berdikari: Jurnal Pengabdian Masyarakat Indonesia Indonesian Journal of Chemical Analysis (IJCA) Jurnal Ilmiah Cendekia Eksakta Stannum : Jurnal Sains dan Terapan Kimia IJCR (Indonesian Journal of Chemical Research) STATIKA: Jurnal Teknik Sipil Magistrorum et Scholarium: Jurnal Pengabdian Masyarakat Gunung Djati Conference Series AGRIC Rafflesia Journal of Natural and Applied Sciences (RJNAS) Biosaintifika: Journal of Biology & Biology Education Journal of Tropical Pharmacy and Chemistry

Yohanes Martono

Universitas Kristen Satya Wacana

Author-ID : 316681

Religion Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Dentistry Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Public Health Social Sciences Other

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Characterization of Cassava (Manihot esculenta Crantz) Peel Activated Carbon based on Impregnation Ratio and Activation Temperature Blessy Yemima Andiani; Cucun Alep Riyanto; Yohanes Martono
Stannum : Jurnal Sains dan Terapan Kimia Vol 4 No 1 (2022): April 2022
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v4i1.2533

Cassava peel is a natural material that is still underutilized even though has the potential as an alternative to activated carbon precursors. In the synthesis of activated carbon, the impregnation ratio and activation temperature are important factors that affect the characteristics of the activated carbon produced. This study aims to determine the effect of variations in the impregnation ratio (carbon: H3PO4) and activation temperature on the characteristics of activated carbon from cassava peel (CPAC) and to determine the optimal conditions in the manufacture of CPAC. In this study, CPAC was produced by treatment with various impregnation ratios of 1:5, 1:6, 1:8, 1:10, and 1:12 (w/w, carbon: H3PO4 30%) and a range activation temperature variation of 400 - 800 °C in the furnace for 60 minutes. The CPAC results were analyzed using FTIR, XRD, and SEM-EDX instruments. Based on the results of the FTIR test, it is showed that the characteristics of CPAC contain functional groups O–H, C–H, C≡C, C=C, C–O/P=O with an impregnation ratio of 1:6 (w/w, carbon: H3PO4 30%) and an activation temperature of 500 °C for 60 minutes to be the optimal conditions in the production of CPAC. The CPAC has an amorphous crystalline character based on XRD analysis and a hollow (porous) surface based on SEM analysis. The results of the EDX test showed that CPAC consisted of the elements carbon (C), oxygen (O), nitrogen (N), phosphate (P), sodium (Na) with the respective percentages being 72.60%, 15.52%, 10 .32%, 1.09%, and 0.47% respectively.

Pemberdayaan Masyarakat Di Desa Kalikurmo Berbasis Kearifan Lokal Yohanes Martono; Maria Endah Retno Palupi; Betsy Felita; Sekar Nurani Saptaningtyas; Bereka Meidelivia Raharjianti; Fransiskus Tri Wahyu Hananto
Magistrorum et Scholarium: Jurnal Pengabdian Masyarakat Vol 1 No 1 (2020)
Publisher : Universitas Kristen Satya Wacana Salatiga

This community service activity is aimed at empowering the people of Kalkurmo Village, Beringin District, Semarang Regency through the processing of local natural resources. The appropriate technology being trained is the processing of corn into modified flour which can then be processed into various processed food products. Activities carried out in the form of training and community assistance to master post-harvest corn processing technology. Corn has been successfully processed into flour by fermentation and acetylation and then made into cookies. Cookies products can be used as processed food products to be marketed.

Pelatihan Daring Pembuatan Produk ‘Hand Sanitizer’ untuk Guru-guru di Sekolah SMP dan SD Laboratorium Satya Wacana Hartati Soetjipto; November Rianto Aminu; Yohanes Martono; Devina Intan Sari; Widhi Nugroho Meindra; Tiffany Febetania Widodo; Diyonisio Kevin Elisando
Magistrorum et Scholarium: Jurnal Pengabdian Masyarakat Vol 1 No 3 (2021)
Publisher : Universitas Kristen Satya Wacana Salatiga

Kegiatan Pengabdian kepada Masyarakat ini dilaksanakan dalam rangka membantu sekolah mitra dalam menerapkan protokol 3M yang salah satunya adalah menjaga kebersihan tangan. Kegiatan ini ditujukan untuk melatih petugas sekolah mitra dalam pembuatan produk Hand Sanitizer (HS) dan memberikan produk HS sebagai bahan persediaan untuk menerapkan protokol 3M di sekolah. Sebagai sekolah mitra adalah SMP dan SD Kristen Satya Wacana. Institusi sekolah merupakan salah satu tempat yang berisiko tinggi terjadi paparan virus Covid-19 sehingga penting untuk membantu penegakan protokol kesehatan dengan terjaminnya ketersediaan produk HS. Metode pelaksanaan kegiatan ini melalui pelatihan daring pembuatan produk dan pemberian produk HS kepada sekolah mitra sebagai bahan persediaan. Kegiatan ini memberikan bekal ketrampilan petugas sekolah dalam pembuatan produk HS dan menjamin ketersediaan produk HS dalam penerapan protokol kesehatan.

UJI ANTIBAKTERI DAN MODIFIKASI HIDROKSIAPATIT DARI LIMBAH KERABANG TELUR BEBEK (A. platyrhynchos javanica) Agung Rimayanto Gintu; Elizabeth Betty Elok Kristiani; Yohanes Martono
Gunung Djati Conference Series Vol. 18 (2023): Prosiding Seminar Nasional Biologi (SEMABIO) Tahun 2022
Publisher : UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (811.121 KB)

Hydroxyapatite (HAp) was one of synthetic compounds synthesized from raw materials like eggshells, HAp initiated to applied in toothpaste formulations as active compounds role as abrasives, remineralitation agents and antibacteries against caries. The aim of this study was to measured the antibacterial activity of HAp synthesized from Local Duck (A. platyrhynchos javanica) eggshells against 4 species of caries bacteries: S. mutans, L. acidophyllus, N. asteroides and N. asteroides. The concentration of HAp separated into 3 levels: 100, 500 and 1000ppm, the antibacterial activity of HAp only produced against L. acidophyllus at 1000ppm concentration of HAp, the diameter of inhibitory showed 5,19 ± 0,0203mm, this activity belongs to weak activity then need to modified the HAp to increasing the antibacterial activity. The HAp modificated by Mix and Doped. The strongest antibacterial showed by Silver (Ag) doped, with diameter of inhibitory against 4 caries bacteries sequentaly 17,91 ± 0,1723mm; 23,10 ± 0,0361mm; 19,06 ± 0,0348mm; and 19,12 ± 0,0493mm; those modifications increating the antibacterial from weak to strong and very strong range.

Determination of Shelf Life of Herbal Products from the Combination of Stevia rebaudiana, Curcuma zanthorrhiza and Honey (Stekurmin MD) through the Accelerated Shelf Life Test (ASLT) Method Yohanes Martono; Fidelia Novitasari; November Rianto Aminu
Jurnal Kimia Sains dan Aplikasi Vol 23, No 9 (2020): Volume 23 Issue 9 Year 2020
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Stekurmin MD is a syrup preparation formulated from the extract of Stevia rebaudiana leaves, temu lawak (Curcuma zanthorrhiza), and honey. One of the active compounds in Stekurmin MD products is phenolic and flavonoid compounds in which the active phenolic and flavonoid compounds can be degraded during the storage period. This study aimed to determine the shelf life of Stekurmin MD products based on the degradation of phenolic compounds and flavonoids. The Accelerated Shelf Life Test (ASLT) method was used in determining the shelf life kinetics of this product. Phenolic and flavonoid concentrations were determined using the UV-Vis spectrophotometric method with the gallic acid standard for phenolic and quercetin standard for flavonoids. Degradation of phenolic and flavonoid compounds was determined every 7 days during 35 days of storage at 25, 35, 45, and 55°C ± 2°C. In natural ingredients, there is a multi-mechanism reaction. The shelf life of Stekurmin MD products based on the degradation of phenolic and flavonoid active ingredients at room temperature were 39.909 days and 23.53 hours, respectively.

Validation of UV-VIS Spectrophotometric Methods for Determination of Inulin Levels from Lesser Yam (Dioscorea esculenta L.) Sandra Ayu Apriliyani; Yohanes Martono; Cucun Alep Riyanto; Mutmainah Mutmainah; Kusmita Kusmita
Jurnal Kimia Sains dan Aplikasi Vol 21, No 4 (2018): volume 21 Issue 4 Year 2018
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Validation of methods is necessary to ensure that the analytical methods used are appropriate and reliable. In this research, the determination of validation method and determination of inulin content from gembili bulb (Dioscorea esculenta L.). The method used for determining inulin levels is UV-Vis spectrophotometry. Based on the results obtained, the maximum wavelength determination of inulin levels is 520 nm. The method of analysis in this study meets the specified validation requirements. These parameters include the equation on the inulin raw curve y = 0.0045x +0.109 with the coefficient of determination 0.9992. The accuracy of the methods tested using the recovery test was 96.14-106.76% at concentrations of 25, 100, and 225 ppm. The intraday precision test is in the range of 2.67-6.82% at the same concentration as the accuracy test. Precision interday equal to 7.41% at concentration 225 ppm for 3 day analysis period. The values of LOD and LOQ are 3.58 ppm and 11.95 ppm, respectively. The concentration of inulin extract from gembili bulb is 840.44-12188.59 ppm.

Reducing Chemical Oxygen Demand and Turbidity Levels in Laundry Waste Using Activated Carbon from Water Hyacinth Leaves Cucun Alep Riyanto; Nur Ayu Hidayati; Yohanes Martono
Indonesian Journal of Chemical Analysis (IJCA) Vol. 6 No. 2 (2023): Indonesian Journal of Chemical Analysis
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijca.vol6.iss2.art8

Lignocellulose compounds contained in water hyacinth leaves (WHL) (Eichhornia crassipes) can be used as raw material for the manufacture of activated carbon at a low and renewable rate. The ACWHL can be used as adsorbent for reducing a COD value and turbidity levels on laundry waste. The purpose of this study is to determine the best adsorption modelling of ACWHL on COD values and turbidity levels in laundry waste in kinetics and isotherm studies and determine the effectiveness of reducing a COD value and turbidity levels. The process of making ACWHL is carried out by carbonization at 400 Â°C for 1 hour, then activated using 30% H3PO4 at an impregnation ratio of 1:4 (w/w) for 24 hours and physical activation at 600 Â°C for 1 hour. The results showed that the adsorption of ACWHL on COD value and turbidity levels of laundry waste followed Freundlich isotherm and Elovich isotherm modelling with R2 values of 0.9535 and 0.9905, respectively. The modelling for adsorption kinetics of COD values and turbidity levels in laundry waste follows the Pseudo Second Order kinetics modelling. The effectiveness of ACWHL reduction in adsorption of COD value and turbidity levels of laundry waste was 80.76% and 64.71%.

PENGARUH INTENSITAS CAHAYA TERHADAP DEGRADASI WARNA AGARAGAR YANG DIWARNAI SARI UMBI BIT MERAH (Beta vulgaris L. var. rubra L.) Lydia Ninan Lestario; Noviana Gunawan; Yohanes Martono
Agric Vol. 25 No. 1 (2013)
Publisher : Fakultas Pertanian dan Bisnis, Universitas Kristen Satya Wacana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24246/agric.2013.v25.i1.p42-50

The aims of this research were to determine the concentration of beetroot juice in jelly which panelists like best; to determine the color degradation rate constant in jelly colored with beetroot juice caused by sunlight and fluorescent light; and color degradation rate constant of jelly colored with synthetic colorant.The organoleptic test used 2,5 percent; 5 percent; 7,5 percent; 10 percent; and 12,5 percent beetroot juice and permitted synthetic colorant for food. The light intensity to test the beetroot color stability in jelly were 879,06 lux, 1.688,54 lux, 2.342,2 lux and 6.752,2 lux.The results showed that the concentration of beetroot juice which panelists like best was 5 percent.; The color degradation rate constant of jelly colored by 5 percent beetroot juice on intensity 879,06 lux was 0,0468 hour-1; 1.688,54 lux was 0,0565 hour-1; 2.342,2 lux was 0,0653 hour-1;6.752,2 lux was 0,0887 hour-1. The higher the light intensity, the higher the degradation constant rate.

Combination of polyherbal Phyllanthus reticulatus with Zingiber officinale and Cymbopogon citratus to optimize the antioxidant capacity Elizabeth Betty Elok Kristiani; Sri Kasmiyati; Yohanes Martono
Pharmaciana Vol 14, No 1 (2024): Pharmaciana
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/pharmaciana.v14i1.28002

Currently, the public is interested in polyherbal-based foods and beverages as a source of natural antioxidants. The aim of the study is to evaluate the antioxidant properties and the phenolic and flavonoid compounds of formulations containing Z. officinale, C. citratus, and P. reticulatus (ZCP). Each sample was extracted using the maceration process in an ethanol solvent at room temperature for three 72-hour periods. There were fourteenth formulation of Z. officinale rhizome, C. citratus leaves, and P. reticulatus fruit which used Design of Expert (DoE). The DPPH method was used to determine the power of antioxidants. The flavonoid content of the extract was measured using the colorimetric method and AlCl3 reagent, while phenolics content using Folin-Ciocalteu. The formulations ZCP 1:0:0, 0:0:1, and 1:1:1 showed the antioxidant capacity in a strong categorization, with an IC50 value less than 50 µg/ml, while ZCP 0:1:0 was in a weak categorization (IC50 > 250 µg/ml). Another ZCP formulation was in a medium category. The ZCP 1:1:1 formulation was suggested as the best one for this investigation, which contains three plant samples. This formulation is interesting for further toxicity studies and in vivo testing so that it can be applied as an antioxidant-rich supplement product.

Synthesis of porous Hydroxyapatite (HAp) from Laying Chicken Waste Eggshells Agung Rimayanto Gintu; Elizabeth Betty E. Kristiani; Yohanes Martono
RAFFLESIA JOURNAL OF NATURAL AND APPLIED SCIENCES Vol. 2 No. 2 (2022): Oktober
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rjna.v2i2.23931

Hydroxyapatite (HAp) was the type of bioceramics synthesized from the compound which rich Calcium (Ca) contains, these bioceramics commonly used to repair the damage of hard tissues. In this study threatened the synthesis of HAp from laying chicken eggshells, the characterization of the eggshells showed that the contains of Calcium 0,9809 ± 0,0118g/g; Phosphate 0,0236 ± 0,0009g/g; and ratio of Ca/P 2,0840%. The synthetic process by base precipitation method showed the yield 77,5786 ± 0,3509%; and from the synthetic obtained the HAp with contains of Calcium 0,1522 ± 0,0047g/g; Phosphate 0,01354 ± 0,0019g/g; and ratio of Ca/P 0,9162%. The Biochemical characterization of the HAp showed that the Porosity 70,5940 ± 0,4104%; Biodegradability 16,1879 ± 0,1362%; and swelling Ability 28,0549 ± 0,1054%. The entire result of the research concluded that the sample eggshells potentially became one of the sources of HAp, and the HAp synthesized from the eggshells potentially to apply as remineralization agents.

Co-Authors A. Rindang Anggit Laksono Abdul Rohman Abi Berkah Nadi, Muhammad Agung Rimayanto Gintu Agung Rimayanto Gintu Agung Rimayanto Gintu Agung Rimayanto Gintu Agung Rimayanto Gintu Andreas Setiawan Andriyani Rosita Sari Anggelia Essi Christian Ari Hasna Widyapuspa Bereka Meidelivia Raharjianti Bernaditha Catur Marina Betsy Felita Betsy Felita Cucun Alep Riyanto Devina Intan Sari Devinta Lestari Dewi Kurnianingsih Arum Kusumahastuti Diyonisio Kevin Elisando Dwiky Iswara, Kerri Eliana Prabalaras Elisabeth Betty Elok Kristiani Elizabeth Betty E. Kristiani Elizabeth Betty Elok Kristiani Erlien Giovani Soeroso Fahmi Puteri Perdani Ferdy Semuel Rondonuwu Fidelia Novitasari Fransiskus Tri Wahyu Hananto Franyoto, Yuvianti Dwi Gunawan, Raden Harry Setiawan Hartati Soetjipto Hartati Soetjipto Hindra, Ronal Febria Ida Suskawati Ika Puspitaningrum Ika Puspitaningrum Ira Tyas Kurniasari Kachingwe, Baxter Hepburn Kusmita Kusmita Lia Kusmita Lucia Devi Danriani Lydia Ninan Lestario Maria Endah Retno Palupi Muhamad Syaiful Ampri Mutmainah Mutmainah Mutmainah Mutmainah Mutmainah Mutmainah Nawawi, Sherly Novita Sari November Rianto Aminu Noviana Gunawan Novitasari, Shartyka Nur Ayu Hidayati Rahayu Sulistyorini Rahayu Sulistyorini Rema Fitriyani Salsabila Eka Ghina Rana Sandra Ayu Apriliyani Sasana Putra, Sasana Sekar Nurani Saptaningtyas Sherly Novita Sari Nawawi Slamet Widodo Sri Hartini Sri Hartini Sri Kasmiyati Sudibyo Martono Sudibyo Martono Sugeng Riyanto Suharto, Kiki Fransiska Suryasatriya Trihandaru Susanti Pudji Hastuti Tambunan, Hermon Frederik Tiffany Febetania Widodo Tonia Nur Fitria Widhi Nugroho Meindra Wijaya, Daniel Ricky Putra Wulandari, Resa Yayi Suryo Prabandari Yoko Putra Nusantara Yuniarti, Zulfa Zhafira, Elian Zulfa Yuniarti

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