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All Journal Jurnal Kependidikan: Penelitian Inovasi Pembelajaran Jurnal Penelitian Saintek INOTEKS : Jurnal Inovasi Ilmu Pengetahuan, Teknologi, dan Seni Jurnal Inovasi Pendidikan Jurnal Sains Dasar Indonesian Journal of Chemistry Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA Indonesian Journal of Chemistry and Environment SEMESTA: Journal of Science Education and Teaching Jurnal Elemen Kimia Jurnal Riset Pembelajaran Kimia

Regina Tutik Padmaningrum

Universitas Negeri Yogyakarta

Author-ID : 338367

Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Education Materials Science & Nanotechnology Other

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CHANGES OF COLOR AND P-KAROTEN RATE IN THE UBI.JALAR (IPOMEA BATATAS, L) FLOWS BLEACHING Regina Tutik Padmaningrum; M. Pranjoto Utomo
Jurnal Penelitian Saintek Vol 12, No 2: Oktober 2007
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

he researh to stuJlythe influence of the kinds and the concentrations of bleach solution to the co1lientof fJharoten and the color ofjaw a sweet potato flour has been done. Yellowjawa sweet potato was used in this reseach. This reseon:h was a descripstive qualitative research. The subject of the researdt was jawa sweet potato and the object was jawa sweet potato flourquantities including the content of fi-charotenand the color of theflour.. TIre independen: variables were the kinds .and the concentrations of bleach solution. and the dependent variableswere the con/ell!offJ-charoten ami.the color ofjawa sweet potato flour. In 1.00% bleach solllliDn. the costen: of fi-charoten with sodium sulfite, sodium bisulfite. Co(OHJ!l. ascorbic acid were: 2.18985,1.40835, 2.25795 and 0.78315 mgllOO grams flour respectively. In1.00% bleach solution. the color of soaked jawa sweet potato flour in sodium sulfite, sodium bisulfite,. Ca(OH);]ascorbic acid were: red (R= 0.3) =yellow (Y = 0.7). red (R = O.2)-yeJlow (Y = 0.5), red (R = 0.5)-yellow(Y= 1.0)andred(R=0.1)-yeHow(R = 1.2) respectively. Theresearch showed that the concentration of bleach solution influencedsignificantly the content of fJ-cIwroten and the color of jawa sweet potato flour. The concentration ofbead: solution tat yielded the bigest content offJ-charotenwas LOW"".

UTILIZATION OF COPPER WEIGHT METAL ION (II), KROMIUM (III), TIMBAL (II), AND SENG (II) IN LIQUID WASTE INDUSTRY FOR ELECTROPLATING IRON COATING Siti Marwati; Regina Tutik Padmaningrum; Marfuatun Marfuatun
Jurnal Penelitian Saintek Vol 14, No 1: April 2009
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

This Research aim to know: 1) the potential difference which can degrade the heavy metal ion concentration of Cu(II), Cr(III), Pb(II), and Zn(II) in liquid waste of electroplating maximally, 2) the efficiency of degradation of heavy metal ions concentration of Cu(II), Cr(III), Pb(II), and Zn(II) in liquid waste of electroplating at optimal potential difference, and 3)the potential difference yielding the nicest coat quality pursuant to its physical appearance.This research early with the preparation electroplating: 1) the preparation of sample liquid waste, 2) platinum electrode,and 3) iron metal to be arranged in layers. The instrument of this research is potentiometers Shimadzu NES_5F. Process the electroplating has been done at variations of potential difference that are 2.0; 2.5; 3.0; 3.5; 4.;, 4.5; and 5.0 V. Analysis of concentration of metal ions in liquid waste of electroplating before and hereafter process the electroplating have been done by atomic absorbtion spectrophotometric (AAS). Perception result of coating have been done visually by researcher. The result of this research are 1) the potential differences which can degrade the heavy metal ions concentration of Cu(II), Cr(III), Pb(II), and Zn(II) in liquid waste of electroplating maximally is 4 V, 2) efficiency of degradation of heavy metal ions concentration of Cu(II), Cr(II), Pb(II), and Zn(II) in liquid waste of electroplating at optimal potential difference successively are 21.30; 72.37; 51.00; and 58.60 %, and 3) potential difference yielding the nicest coat quality pursuant to its physical appearance is 4 V.

PEMECAHAN MASALAH LIMBAH LAUNDRY DI SLEMAN DENGAN PROGRAM IPTEK BAGI MASYARAKAT (IbM) Tien Aminatun; Regina Tutik Padmaningrum; - Yuliati
INOTEKS : Jurnal Inovasi Ilmu Pengetahuan, Teknologi, dan Seni Vol 20, No 1: Februari 2016
Publisher : LPPM UNY

Karangmalang and Kuningan are the area located near the campus ofYogyakarta State University and Gadjah Mada University. This causes the twoareas have crowded population. Many students from outside of Sleman Yogyakarta stay in many boarding houses that need laundry service since they do not have enough time and are very busy of studying activities. There are approximately 30 laundry service businesses in these areas. The condition has positive impact on local people income generating. However, it also cause adverse effects on the environment because of the laundry waste water directly discharged into the environment without prior treatment. The priority problem to solve is the disposal of waste water and dissemination of eco-friendly detergen. We had “Sekar Laundry” and “Ramadhani Laundry”as our partners in this programme. To achieve the objectives of the project we carried out the following methods: (1) socialization, counseling, and training for the introduction of ecofriendly detergents and simple sewage treatment; and (2) the application of appropriate technology of waste water treatment based on fitoremediation for both partners. The results obtained were in accordance with the purposes. We could overcome the environmental pollution caused by waste water of laundry activities. Based on laboratory tests, laundry waste water from the outlet of the Waste Water Treatment Plant (the WWTP) had significantly quality improvement that it made safer to be discharged into the environment, with 27,125% of BOD decline efficiency, 120,350% of COD decline efficiency, 17,300% of TSS decline efficiency, 11,597% of detergent decline efficiency, and 88% of phosphate decline efficiency

PROFILE OF PROSPECTIVE CHEMISTRY TEACHER IN DEVELOPING LEARNING TOOLS ACCORDING TO STANDARD PROCESS Metridewi Primastuti; Regina Tutik padmaningrum
SEMESTA: Journal of Science Education and Teaching Vol 3 No 2 (2020): Science Education Journal
Publisher : Pendidikan IPA, FMIPA, UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (371.448 KB)

In the educational unit, educator have to develop learning tools. In this study, learning tools are limited to the Lesson Plan (Rencana Pelaksanaan Pembelajaran/RPP). The lesson plan must be prepared in a complete and systematic structure according to the Standard Process. This research was conducted to analyze the profile ability of prospective chemistry teachers in developing lesson plan in accordance with the criteria of the RPP component in the Regulation of the Minister of Education and Culture of the Republic of Indonesia Number 22 of 2016 about Primary and Secondary Education Standard Process. This research method was descriptive with a quantitative approach. The research subject consisted of 10 chemistry education students in the 6th semester who were determined by purposive sampling. Research data was obtained through the RPP assessment rubric consisting of 8 indicators with a score of 1 to 4. The technique of data analysis is using percentage analysis, which are converted into the interval category criteria. Based on the analysis, it is known that profile of prospective chemistry teacher in developing lesson plans is in the good ability category.

Development of Voltammetry Analysis Method of Copper Metal Ions by Solid-State Membrane with Carbon Nanotube Suyanta Suyanta; Sunarto Sunarto; Regina Tutik Padmaningrum; Karlinda Karlinda; Illyas Md. Isa; Rahadian Rahadian
Indonesian Journal of Chemistry Vol 21, No 2 (2021)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.55056

This study was aimed to develop a method for metal analysis in continuous integration using voltammetry techniques. The research subject was copper(II) ions. The objects of research were linearity, scan rate, repeatability of readings, and the presence of Cu(II) levels in well water samples. In this study, a selective electrode was developed with a solid membrane voltammetry system using differential pulse voltammetry measurement. The results showed the regression line of voltammetry method, y = 10.265 ln (x) + 330.47, with a correlation value of 0.9654, the optimum scan rate was 10 mV/s, and within five repetitions of each measurement for one electrode, it showed good repeatability. Meanwhile, the result of regression with the UV-Vis spectrophotometric method for Cu(II) was y = 0.12386x + 0.00879 with a correlation value of 0.9943. The voltammetry method was found to be much better than the UV-Vis method because it was able to be used for analysis up to a concentration of 6.35 × 10–4 ppm (or 1.00 × 10–11 M), while the UV-Vis method was only able to analyze up to 1.5 ppm (or 2.36 × 10–5 M).

Treatment of Industrial Wastewater and Household Waste Using Electrocoagulation Method with Aluminum Electrode S. Suyanta; S. Sunarto; Susila Kristianingrum; Regina Tutik Padmaningrum; Derifasay Salsabilla; K. Karlinda
Indonesian Journal of Chemistry and Environment Vol 5, No 2 (2022): DECEMBER 2022
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/ijoce.v5i2.58394

The treatment of industrial wastewater and household waste using the electrocoagulation method with aluminum electrodes aims to determine the optimal time and voltage to reduce iron content, manganese content, and TDS from industrial wastewater and household waste. The method used in this study was the electrocoagulation method with aluminum electrodes. The object of this research was the reduction of iron content, manganese content and TDS of industrial wastewater and household waste. The optimization test of electric voltage and electrocoagulation time was carried out at variations of electric voltage of 5, 10, and 15 volts and time variations of 1, 3, 6, 9, and 12 hours. Then the samples were analyzed using Atomic Absorption Spectroscopy (AAS), pH meter and TDS meter. The results showed that the optimal time and voltage to reduce iron content, manganese content, and TDS of industrial wastewater and household waste was 12 hours and 15 volts. After the electrocoagulation process, the iron content was reduced by 95.37%, the manganese content was reduced by 100%, the TDS value was reduced by 43.66%, and the pH value increased by 26.73%.

APLIKASI HIDROKSIDA LOGAM KADMIUM (II)HASIL ELEKTROKOAGULASI LIMBAH CAIR ELEKTROPLATING UNTUK PEWARNA GELASIR KERAMIK Sri Wahyuni; Regina Tutik Padmaningrum
Jurnal Elemen Kimia Vol 7, No 2 (2018): Jurnal Kimia Dasar
Publisher : Universitas Negeri Yogyakarta

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AbstrakPenelitian ini bertujuan untuk mengetahui pengaruh suhu pembakaran dan massa hidroksidalogam hasil elektrokoagulasi limbah cair elektroplating terhadap warna gelasir keramik. Tahapanpenelitian meliputi karakterisasi limbah cair elektroplating, elektrokoagulasi, dan penggelasiran keramik.Limbah cair elektroplating dielektrokoagulasi pada pH 8, rapat arus 0,00125 A/cm2, elektroda Al-Al,volume 500 mL, dan waktu selama 30 menit. Hidroksida logam hasil elektrokoagulasi diaplikasikansebagai bahan pewarna gelasir keramik. Pengaruh suhu pembakaran keramik dipelajari dengan variasi999, 1060, dan 1101℃. Pengaruh massa dipelajari dengan variasi 4, 12, dan 16%. Hasil penelitianmenunjukkan bahwa kadar logam kadmium dalam limbah cair elektroplating sebesar 0,0890 mg/L,sedangkan dalam hidroksida logam hasil elektrokoagulasi kadar logam Cd sebesar kurang dari 0,01%.Suhu pembakaran dan massa hidroksida mempengaruhi nilai L*, a*, dan b* warna gelasir keramik.Semakin besar suhu pembakaran dan massa hidroksida logam, semakin kecil nilai L* tetapi nilai a*b*semakin besar dan warna yang dihasilkan semakin gelap.Kata kunci: hidroksida logam kadmium, elektrokoagulasi, suhu pembakaran, massa, gelasir keramik.

VALIDASI PAPER TEST UNTUK UJI FORMALIN DENGAN PEREAKSI SCHIFF’S Rika Setianingrum; Regina Tutik Padmaningrum
Jurnal Elemen Kimia Vol 5, No 5 (2016): Volume 5, No 5 Edisi 5 Tahun 2016
Publisher : Universitas Negeri Yogyakarta

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Penelitian ini bertujuan untuk mengetahui kestabilan paper test untuk uji formalin pada ruang terbuka, tertutup dan lama penyimpanan, method detection limit (MDL), presisi dan akurasi. Pereaksi yang digunakan untuk uji formalin adalah pereaksi Schiff’s. Paper test yang telah direndam dalam pereaksi kemudian dicelupkan dalam larutan sampel. Intensitas warna diukur dengan alat chromameter. Hasil penelitian menunjukkan bahwa panjang gelombang maksimal yang dihasilkan adalah 554 nm. Paper test pada ruang tertutup lebih stabil daripada ruang terbuka. Paper test dalam keadaan tertutup kurang stabil selama penyimpanan 3 minggu. MDLL* sebesar 2,084745, MDLa* sebesar 0,610545, dan MDLb* sebesar 1,0799425. Presisi dalam penelitian ini dilihat dari nilai standar deviasi relatif yaitu L* sebesar 3,9246%, a* sebesar 26,2197%, dan b* sebesar -21,4017%. Hal ini menunjukkan bahwa presisi paper test kurang baik, presisi yang baik adalah nilai RSD 5%. Akurasi paper test dinyatakan dengan nilai perolehan kembali sebesar 141,4362% dan dengan nilai galat sebesar 41,1656%. Hal ini menunjukkan bahwa akurasi paper test kurang baik, karena akurasi yang baik adalah jika nilai perolehan kembali sebesar 90-110% dan nilai galat mendekati nol. Paper test valid digunakan untuk uji kualitatif, tetapi tidak valid untuk uji kuantitatif.

VALIDASI METODE ANALISIS FORMALIN SECARA SPEKTROFOTOMETRI SINAR TAMPAK DENGAN PEREAKSI SCHYRVER Dhanianto Choirudin Mabrury; Regina Tutik Padmaningrum
Jurnal Elemen Kimia Vol 5, No 5 (2016): Volume 5, No 5 Edisi 5 Tahun 2016
Publisher : Universitas Negeri Yogyakarta

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Penelitian ini bertujuan untuk mengetahui validitas metode analisis formalin secara spektrofotometri sinar tampak dengan pereaksi Schryver. Parameter dalam penelitian ini adalah optimasi panjang gelombang dan validasi metode meliputi uji linieritas, daerah kerja, batas deteksi, batas kuantitasi, presisi, dan akurasi.Subjek penelitian ini adalah analisis kualitatif dan kuantitatif formalin dengan pereaksi Schryver. Objek penelitian ini adalah panjang gelombang maksimal, uji linieritas, daerah kerja, batas deteksi, batas kuantitasi, presisi, dan akurasi. Uji dilakukan terhadap sampel ikan berformalin.Hasil penelitian menunjukkan panjang gelombang maksimal adalah 517,50 nm. Uji linieritas menunjukkan bahwa ada hubungan linier antara konsentrasi dengan absorbansi yang ditunjukkan dengan persamaan Y = 0,01492X – 0,00504 dengan nilai koefisien korelasi (r) sebesar 0,9963. Daerah kerja pengukuran adalah (12,195-46,445) ppm. Batas deteksinya adalah 0,0829 ppm dan batas kuantitasinya adalah 0,2763 ppm. Nilai presisi dinyatakan dengan Relative Standard Deviation (RSD) sebesar 0,95% yang berarti presisi baik. Uji akurasi dinyatakan dengan galat sebesar 11,48%. Berdasarkan hasil tersebut dapat disimpulkan bahwa metode analisis penentuan kadar formalin secara spektrofotometri UV-Vis memenuhi presisi yang baik dan akurasi yang kurang baik.

APLIKASI HIDROKSIDA LOGAM KROMIUM HASIL ELEKTROKOAGULASI LIMBAH CAIR ELEKTROPLATING UNTUK PEWARNA GELASIR KERAMIK Hema Laksita Hapsari; Regina Tutik Padmaningrum
Jurnal Elemen Kimia Vol 7, No 3 (2018): Jurnal Kimia Dasar
Publisher : Universitas Negeri Yogyakarta

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AbstrakPenelitian ini bertujuan untuk mengetahui pengaruh suhu pembakaran dan massa hidroksida logamkromium hasil elektrokoagulasi terhadap warna gelasir keramik. Tahapan yang dilakukan pada penelitian ini yaitukarakterisasi sifat fisika dan kimia limbah cair elektroplating dengan AAS, elektrokoagulasi limbah elektroplating,karakterisasi endapan dengan XRF dan penggelasiran keramik. Hasil penenelitian ini menunjukkan bahwa kadarlogam kromium dalam limbah cair elektroplating yaitu 0,5480 dan kandungan kadar logam kromium dalamendapan hidroksida hasil elektrokoagulasi kurang dari 0,01%. Suhu pembakaran dan massa hidroksida logamkromium hasil elektrokoagulasi mempengaruhi warna gelasir keramik yang dihasilkan. Semakin tinggi suhupembakaran dan semakin banyak massa hidroksida logam kromium yang digunakan mempunyai warnayang semakin gelap, warna hijau yang dihasilkan semakin tua, dan nilai ΔE* yang dihasilkan semakinrendah.Kata kunci: elektrokoagulasi, hidroksida logam, suhu pembakaran, massa, gelasir keramik.

Co-Authors - Yuliati A.K Prodjosantoso A.K Prodjosantoso Anggie Rachmadiana Anti Kolonial Prodjosantoso Bernadus Sentot Wijanarka Chrisberta, Maria Luisella Anadya Putri Derifasay Salsabilla Dhanianto Choirudin Mabrury Eli Rohaeti Endang Widjajanti Laksono FX Fredy Kurniawan Hamida, Zahra Hema Laksita Hapsari Illyas Md. Isa Isa, Illyas Md Isana Supiah Yosephine Louise Julia, Ardhita K. Karlinda Karlinda Karlinda Karlinda Karlinda Karlinda Karlinda M. Pranjoto Utomo Marfuatun Marfuatun Marwati, Siti Marwati Metridewi Primastuti Munji Lestari Nur Taufiq Putri, Milda Rahma Qonitah Fardiyah Rahadian Zainul Rahmawati, Aprilia Resti Syara Ronita Rika Setianingrum SARAH SARAH Sinaga, Krisna Marihot Leonardus Siti Marwati Siti Mawarti Sri Sunarmiati Sri Wahyuni Sunarto ' Sunarto Sunarto Sunarto Sunarto Sunarto Sunarto Susila Kristianingrum Suyanta Suyanta Tien Aminatun Titis Catur Wigati Ulliyah Sumanjaya V. Lilik Hariyanto Wiraputri, Luthfia Yuliati Yuliati

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