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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
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Potency of Industrial Tea Waste: Comparison Between Green And Black Tea Industrial Wastes as UV Filter for Sunscreen Yohanes Martono
Indonesian Journal of Cancer Chemoprevention Vol 1, No 1 (2010)
Publisher : Indonesian Society for Cancer Chemoprevention

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14499/indonesianjcanchemoprev1iss1pp54-59

Abstract

Indonesia is one of ten biggest countries that produce tea for world. It makes Indonesia produce various tea products. Every tea production process produces the large quantity of industrial tea wastes every day. Our previous research showed that industrial tea wastes still have antioxidant activity. It means that industrial tea wastes contained of phenolic compounds which can be used as UV filter for sunscreen. This research compared antioxidant activity, total phenolic contents and UV filter effectiveness between green and black industrial tea wastes. Antioxidant activity were analyzed by reducing power and DPPH method, total phenolic contents of tea wastes extract were analyzed using Folin-Ciocalteu assay, while UV filter effectiveness were assessed by UV spectra and absorbance of each tea wastes extract related to its concentration in order to yield maximum protection. The results showed that although green tea waste extract had higher antioxidant activity but adversely, black tea had higher total phenolic contents. UV filter effectiveness is affected by polyphenols content in substances, so it suggested that black tea waste extract is more potential than green tea waste extract as photoprotection substance.Keywords: tea waste, UV filter, sunscreen
Identifikasi Kualitas Beras Putih (Oryza sativa L.) Berdasarkan Kandungan Amilosa dan Amilopektin di Pasar Tradisional dan “Selepan” Kota Salatiga Andriyani Rosita Sari; Yohanes Martono; Ferdy Semuel Rondonuwu
Titian Ilmu: Jurnal Ilmiah Multi Sciences Vol 12 No 1 (2020): Titian Ilmu: Jurnal Ilmiah Multi Sciences - January 2020
Publisher : Universitas Nurul Huda

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (148.604 KB) | DOI: 10.30599/jti.v12i1.599

Abstract

Kualitas beras dapat dipengaruhi dari karakteristik kimiawi yang berbeda seperti kandungan amilosa dan atau amilopektin. Penelitian ini bertujuan untuk mengindentifikasi kualitas beras berdasarkan kandungan amilosa dan amilopektin pada berbagai varietas beras putih di pasar tradisional dan “selepan” daerah Kota Salatiga dan sekitarnya. Metode yang digunakan yaitu spektrofotometri UV-Vis pada panjang gelombang 530nm dan 630nm. Perbedaan rata-rata kandungan amilosa dan amilopektin antar varietas diuji menggunakan RAL dengan metode ANOVA satu arah dengan selang kepercayaan 95%. Berdasarkan data yang diperoleh, kandungan amilosa dalam varietas IR64 (27,40-28,64%), GH (26,39-28,48%), MW (22,84-27,52%;), PW (18,94-23,57%), dan Umbul (27,21-28,02%). Kandungan amilopektin pada varietas IR64 (59,57-60,06%), GH (56,72-63,52%), MW (53,64-61,63%), PW (54,67-62,43%), dan Umbul (53,41-57,98%). Berdasarkan uji ANOVA, kandungan amilosa pada varietas PW “selepan” kandungan amilosa paling rendah dibandingkan dengan di pasar tradisional dan varietas lainnya. Kandungan amilosa yang rendah akan meningkatkan kriteria kepulenan nasinya. Kandungan amilopektin tertinggi terdapat pada varietas beras GH “selepan”.
Pengaruh Penambahan Beberapa Konsentrasi Gula terhadap Stabilitas Warna Ekstrak Antosianin Buah Rukem (Flacourtia rukam Zoll. & Mor.) Salsabila Eka Ghina Rana; Lydia Ninan Lestario; Yohanes Martono
Jurnal Aplikasi Teknologi Pangan Vol 7, No 4 (2018): November 2018
Publisher : Faculty of Animal and Agricultural Sciences, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (676.725 KB) | DOI: 10.17728/jatp.2581

Abstract

Penelitian ini bertujuan untuk menentukan pengaruh penambahan gula dengan konsentrasi yang bervariasi terhadap stabilitas warna ekstrak antosianin buah rukem yang terpapar cahaya lampu fluoresens berdasarkan kinetika degradasi warnanya dan menentukan konsentrasi gula yang optimal untuk meningkatkan stabilitas warna ekstrak antosianin buah rukem. Variasi konsentrasi gula yang digunakan adalah 20, 40, dan 60% (b/v). Uji stabilitas warna dilakukan terhadap ekstrak antosianin buah rukem yang disinari selama 10 jam dengan intensitas cahaya 3580, 4655 lux, dan 8544 lux. Metode yang digunakan yaitu pemodelan kinetika degradasi, dimana nilai konstanta laju degradasi (k) dan nilai waktu paruh (t1/2) dihitung berdasarkan orde reaksi yang sesuai. Degradasi antosianin mengikuti orde reaksi 0. Hasil penelitian menunjukkan bahwa penambahan gula 20% mampu meningkatkan stabilitas warna ekstrak antosianin buah rukem dibandingkan dengan kontrol (tanpa penambahan gula), terlihat dari meningkatnya waktu paruh dari 54,82 jam menjadi 61,35 jam. Namun, pada penambahan gula 40 dan 60% dapat menurunkan stabilitas warnanya dengan menurunnya waktu paruh dari 42,52 jam menjadi 31,66 jam pada intensitas 3580 lux. Kecenderungan kenaikan dan penurunan waktu paruh yang sama juga terjadi pada intensitas cahaya 4655 lux dan 8544 lux. Kesimpulannya, penambahan gula mempengaruhi stabilitas warna ekstrak antosianin buah rukem yaitu dapat meningkatkan dan menurunkan stabilitasnya.Effect of Various Concentration Sugar Addition on the Color Stability of Rukem Fruit Anthocyanin Extract (Flacourtia rukam Zoll. & Mor.)This study is aimed to determine the effect of sugar addition with varying concentrations to the color stability of anthocyanin extract of rukem fruit exposed to fluorescent lamp lights based on color degradation kinetics and determining the optimal sugar concentration to improve color stability of anthocyanin extract of rukem fruit. Variations of sugar concentration were 20, 40, and 60% (w/v). The color stability test was performed on the anthocyanin extract of rukem fruit which was irradiated for 10 hours with the light intensity of 3580, 4655, and 8544 lux. The degradation kinetics modeling was used as method, where the value of the degradation rate constant (k) and half-life value (t1/2) were calculated according to the appropriate reaction order. Degradation of anthocyanin was analyzed using zero order reaction. The results showed that sugar addition at 20% could increase the stability of rukem fruit anthocyanin extract compared to control (without sugar addition), that was reflected by increase of half-life from 54.82  to 61.35 hours. However, addition of 40 and 60% sugar decreased the color stability with the half-life decline from 42.52 to 31.66 hours. The similar half-life increase and decrease also occured at the intensity of light 4655 and 8544 lux. As conclusion, sugar addition might increase and decrease of the color stability in the extract rukem fruit.
Family medicinal plant cultivation facility (SABDA TOGA: Sarana Budidaya Tanaman Obat Keluarga) for urban areas in RT 04 and RT 06 RW 07, Tegalrejo Salatiga Yohanes Martono; Andreas Setiawan; Slamet Widodo
Berdikari: Jurnal Pengabdian Masyarakat Indonesia Vol. 1 No. 1 (2018): Berdikari: Jurnal Pengabdian Masyarakat Indonesia
Publisher : Future Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1072.401 KB) | DOI: 10.11594/bjpmi.01.01.01

Abstract

The limited land owned by the community in urban areas such as RT 04 and 06 RW 07 in the Tegalrejo village in Salatiga makes the Family Medicinal Cultivation Facility (SABDA TOGA) one of the solutions so that the com-munity can continue to grow crops that can be used for daily needs. Through community service (PM), training on how to apply aquaponics planting technology, herbal plants in sacks (taherlarung) and fermentation of organic liquid fertilizer as a TOGA planting model in urban communities. The method used is making demonstration plots for the application of organic aquaponics planting media technology, taherlarung, and fermentation of or-ganic liquid fertilizer for TOGA plants in the partner environment, carrying out data collection on TOGA plants in the community, and conducting socialization in the community. The results of this dedication show that aqua-ponics planting media technology can be combined with a fish pond so that it can produce organic TOGA. Aqua-ponics technology can be automated and can also take advantage of the people's narrow land with a vertical media arrangement pattern. TOGA planting in taherlarung can be increased to become an alternative way of decorating the road. While liquid organic fertilizer is very potential to be produced in large quantities because it utilizes household organic waste with a fermentation period of approximately 1 month. Some people already have TOGA plants but do not know the benefits and how to use them. This PM activity shows that aquaponics, taherlarung and fermentation of organic liquid fertilizer are suitable for TOGA weaving in urban communities. Some urban community groups tend to not know and utilize TOGA.
Determination of Stevioside and Rebaudioside A in Stevia rebaudiana Bertoni Leaves Using near Infrared Spectroscopy and Multivariate Data Analysis Yohanes Martono; Suryasatriya Trihandaru; Ferdy Semuel Rondonuwu
Indonesian Journal of Chemistry Vol 18, No 4 (2018)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (213.832 KB) | DOI: 10.22146/ijc.25580

Abstract

Rebaudioside A and stevioside are abundant steviol glycoside contained in Stevia rebaudiana leaves. These components are widely used as a natural sweetener. The objective of this study was to develop rapid determination method of stevioside, and rebaudioside A in S. rebaudiana leaves using near infrared trans-reflectance spectroscopy (NIRS) combined with multivariate analysis. The reference method used was HPLC. A prediction model was developed using partial least square (PLS) regression. Calibration parameters were calculated based on a calibration set of various stevioside, rebaudioside A from 23 samples. Performance of PLS model was assessed in term of optimum determination coefficient (R2), and minimum root mean square error of cross-validation (RMSEV). Validation of PLS model was performed using cross-validation and leave one out calibration of PLS component. Rebaudioside A has well PLS model in wavenumber region of 4100–5100 cm-1, and stevioside determination using difference wavenumber region of 4760-5016 cm-1. PLS model for total (sum of stevioside and rebaudioside A content) was exploited in wavenumber region of 4568-4928 cm-1. NIRS in combination with multivariate data analysis of PLSR can be applied as a rapid method for determining rebaudioside A and the total amount of steviol glycosides in S. rebaudiana leaves.
Karakterisasi Karbon Aktif Kulit Singkong (Manihot esculenta Crantz) Berdasarkan Variasi Konsentrasi H3PO4 dan Lama Waktu Aktivasi Fahmi Puteri Perdani; Cucun Alep Riyanto; Yohanes Martono
Indonesian Journal of Chemical Analysis (IJCA) Vol. 4 No. 2 (2021): Indonesian Journal of Chemical Analysis
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijca.vol4.iss2.art4

Abstract

Unsur karbon yang cukup tinggi pada kulit singkong membuat peneliti memanfaatkannya sebagai karbon aktif. Tujuan penelitian ini adalahmenentukan karakteristik karbon aktif kulit singkong (KASP) berdasarkan konsentrasi H3PO4 dan lama waktu aktivasi pada suhu 600 °C. Sintesis KASP menggunakan tahap karbonisasi pada suhu 500 °C, impregnasi menggunakan karbon:H3PO4 1:5 (b/b) dengan variasi konsentrasi yaitu pada 10-50%, aktivasi pada suhu 600 °C selama 2 jam. KASP dengan konsentrasi optimal kemudian diaktivasi menggunakan variasi waktu 1-3 jam pada suhu 600 °C. Selanjutnya KASP dikarakterisasi menggunakan FTIR, XRD, dan SEM-EDX. Morfologi permukaan KASP menunjukkan permukaan yang berongga yang dominasi oleh unsur  C(55,20%), O(28,86%), N(8,00%), P(6,22%), dan Na(1,72%).
POTENSI EKSTRAK Stevia rebaudiana Bert PADA SEDIAAN KRIM TABIR SURYA Mutmainah Mutmainah; Lia Kusmita; Yuvianti Dwi Franyoto; Ida Suskawati; Yohanes Martono
CENDEKIA EKSAKTA Vol 4, No 1 (2019)
Publisher : Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.3194/ce.v4i1.2671

Abstract

Sinar UV diketahui memiliki potensi bahaya terhadap kulit manusia, sehingga dibutuhkan tabir surya yang dapat melindungi kulit dari bahaya radiasi sinar matahari Tujuan dari penelitian ini adalah untuk melihat aktivitas biologis dan formulasi ekstrak yang dibuat dari daun Stevia rebaudiana Bert kering. Stevia rebaudiana Bert adalah daun yang memiliki aktivitas sebagai tabir surya. Daun, tetapi juga batang dan bunga stevia mengandung campuran kompleks glikosida diterpen manis, termasuk isosteviol, steviolbioside, stevioside, rebaudiosides (A, B, C, D, E dan F), dan dulcoside A. Selain glikosida, daun stevia juga mengandung komponen lainnya, seperti flavonoid, asam fenolik, asam lemak, protein dan vitamin. Stevia rebaudiana Bert diekstraksi dengan etanol selanjutnya diformulasikan dalam sediaan krim untuk dilihat potensi tabir surya. Hasil uji menunjukkan ekstrak Stevia rebaudiana Bert dalam sediaan krim memiliki efektifitas sebagai tabir surya pada panjang gelombang 290 nm dan memiliki potensi sebagai tabir surya dengan kategori proteksi ultra dengan nilai SPF > 15.  Keywords: Stevia rebaudiana Bert, tabir surya, krim .
Activated Carbon from Sugarcane (Saccharum officinarum L.) Bagasse for Removal Ca2+ and Mg2+ Ion from Well Water Ira Tyas Kurniasari; Cucun Alep Riyanto; Yohanes Martono
Stannum : Jurnal Sains dan Terapan Kimia Vol 2 No 2 (2020): Oktober 2020
Publisher : Department of Chemistry - Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jstk.v2i2.1877

Abstract

Humans need water with good quality to fulfill their needs. Water with high hardness content will have a bad impact if consumed continuously, so the adsorption method is carried out to reduce the concentration of Ca2+ and Mg2+ ions. The adsorption process uses sugarcane bagasse activated carbon (SBAC) and the tested water sample is well water in District Jati, Kudus. Synthesis of SBAC was conducted with H3PO4 30% as an activator at an impregnation ratio of 1:5 (w/w) at temperature 700°C. The FTIR result showed that SBAC contains O-H, C-H, C=C, C≡C, and C-O as functional groups. Analysis result with the XRD instrument showed that the microstructure of SBAC that is formed is turbostatic structure and amorphous. Modeling isotherm suitable for SBAC adsorption on Ca2+ ions is Langmuir isotherm where the R2 value is 0.9134 which shows that the adsorption process occurs chemically and monolayer. Modeling isotherm suitable for SBAC adsorption on Mg2+ ions is Elovich isotherm where the R2 value is 0.8638 which means that the adsorption process is multilayer and adsorption in non-ideal conditions. Modeling kinetics suitable for SBAC adsorption on Ca2+ and Mg2+ ions is Pseudo Orde 2 where the R2 value is 0.9395 and 0.7274. Percent efficiency value of sugarcane activated carbon adsorption of Ca2+ dan Mg2+ ions on District Jati, Kudus well water is 14.44% and 8.94% and 40 minutes stirring time.
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

Abstract

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.
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

Abstract

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.
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