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All Journal BERKALA FISIKA Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Spektra: Jurnal Fisika dan Aplikasinya Jurnal Ilmiah Sarasvati : Bahasa, Sastra, dan Pengajarannya Jurnal Pendidikan Ilmu Pengetahuan Alam (JP-IPA) DIKMAT: Jurnal Pendidikan Matematika Pendikdas: Jurnal Pendidikan Dasar PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Jurnal Material dan Energi Indonesia Jurnal Ilmu dan Inovasi Fisika
Sri Suryaningsih
Departemen Fisika FMIPA Universitas Padjadjaran
Aerospace Engineering Arts Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Physics Other

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STUDI KOROSIVITAS DAN MORFOLOGI PERMUKAAN BAJA KARBON API 5L GR-B YANG DILAPISI POLIMER HIBRID PADA LINGKUNGAN AIR LAUT DAN GAS H2S PADA KONDISI JENUH CO2 Setiawidiani, Dinar; Susilawati, Tuti; Suryaningsih, Sri; Harjo, Hardoyo
BERKALA FISIKA 2014: Berkala Fisika Vol. 17 No. 2 Tahun 2014
Publisher : BERKALA FISIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (354.279 KB)

Abstract

It has been tested with the corrosion protection of carbon steel using hybrid inorganic - organic polymer. Hybrid polymer precursor materials is synthesized from monomers poly (TMSPMA) using sol- gel technique. The hybrid polymer precursors coated on the surface of carbon steel API 5L GR - B, and then thermally polymerized. Corrosion test conducted in a seawater environment, H2S, CO2 saturation using potentiodynamic polarization method and morphological examination using a Scanning Electron Microscope. The obtained results shows the corrosion rate of carbon steel without coating in critical condition was 1.643 mm/year. Once the hybrid polymer coated carbon steel with a corrosion rate becomes 0.903 mm/year. The corrosion rate was reduced to 0.74 mm/year. Corrosion rate is related to the protection efficiency of 45.05%. These results are supported by data that shows the surface morphology uneven corrosion on carbon steel surface after coated with polymer hybrid. Keywords : corrosion , carbon steel , polymer hybrid , potentiodynamic polarization
BELIMBING WULUH (Averrhoa Bilimbi) SEBAGAI SUMBER ENERGI DALAM SEL GALVANI Suryaningsih, Sri
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol 6, No 1 (2016)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v6n1.p11-17

Abstract

Sel Galvani yaitu sel yang menghasilkan arus listrik, terdapat tiga komponen, yaitu anoda, katoda, dan elektrolit. Elektrolit dapat berupa senyawa asam, garam, atau amfoter. Belimbing wuluh (Averrhoa bilimbi) merupakan salah satu buah yang mengandung asam format, sehingga berpotensi untuk menjadi larutan elektrolit. Tujuan penelitian ini antara lain: (1) untuk mengetahui bagaimana pemanfaatan belimbing wuluh (Averrhoa bilimbi) sebagai larutan elektrolit dalam sel Galvani untuk menghasilkan energi listrik, dan (2) untuk mengetahui perbandingan jumlah belimbing wuluh (Averrhoa bilimbi) dan energi listrik yang dihasilkan. Metode yang digunakan adalah metode eksperimental yang menggunakan belimbing wuluh sebagai objek penelitian. Hasil penelitian menginformasikan bahwa satu sistem sel Galvani dapat menghasilkan tegangan dan arus listrik sebesar 0.72 volt dan 0.29 mA. Setelah dilakukan penelitian dapat disimpulkan bahwa belimbing wuluh (Averrhoa bilimbi) dapat dimanfaatkan sebagai larutan elektrolit dalam sistem sel Galvani untuk menghasilkan energi listrik.
PENINGKATAN KETERAMPILAN MENULIS ANEKDOT MENGGUNAKAN STRATEGI GENIUS LEARNING Suryaningsih, Sri
sarasvati Vol 3, No 2 (2021)
Publisher : Universitas Wijaya Kusuma Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30742/sv.v3i2.1593

Abstract

The purpose of this study, is to improve the anecdote writing skills of class X OTKP students of SMK Negeri 1 Telen in the academic year 2020/2021 by implementing a genius learning strategy. Classroom action research methods. Classroom action research design begins with planning, action, observe and reflect. Learning with a genius learning strategy can improve the results of anecdotal writing skills. This can be seen from the average score of writing anecdotes before being given action was 64.53, after being given the action at the end of the first cycle the average score became 75.58. The average score of writing anecdotes at the end of cycle II was 85.00. This indicates an increase of 20.47 points. Overall, at the end of the second cycle, all aspects and criteria for writing anecdotes had a significant increase. From the results of the above research, it is evident that the use of the genius learning strategy is considered successful and can improve the anecdote writing skills of the students of class X OTKP SMK Negeri 1 Telen.
ALAT PENDETEKSI DAN PENGUKUR KADAR RHODAMIN B SEBAGAI PEWARNA BERBAHAYA PADA MAKANAN DENGAN BASIS LED RGB Sahrul Hidayat; Putri Aprilia Mulyani; Wahyu Alamsyah; Mariah Kartawidjaja; Sri Suryaningsih
Spektra: Jurnal Fisika dan Aplikasinya Vol 1 No 2 (2016): SPEKTRA: Jurnal Fisika dan Aplikasinya, Volume 1 Nomor 2, Desember 2016
Publisher : Program Studi Fisika Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (230.434 KB) | DOI: 10.21009/SPEKTRA.012.05

Abstract

Abstrak Rhodamin B adalah salah satu zat pewarna sintetis yang biasa digunakan pada industri tekstil dan kertas. Zat tersebut ditetapkan sebagai zat yang dilarang penggunaannya pada makanan melalui Menteri Kesehatan (Permenkes) No.239/Menkes/Per/V/85. Namun penggunaan Rhodamin B dalam makanan masih banyak dilakukan oleh masyarakat. Rhodamin B memiliki senyawa pengalkilasi (CH3-CH3) yang bersifat radikal sehingga dapat berikatan dengan protein, lemak, dan DNA dalam tubuh. Konsumsi Rhodamin B dalam jangka panjang dapat terakumulasi di dalam tubuh dan dapat menyebabkan gejala pembesaran hati dan ginjal, gangguan fungsi hati, kerusakan hati, gangguan fisiologis tubuh, dan dapat memicu timbulnya kanker hati. Pada penelitian ini telah dilakukan pembuatan alat pendeteksi Rhodamin B yang fleksibel dan mudah dioperasikan dengan basis LED RGB. Berdasarkan hasil eksperimen, senyawa Rhodamin B sangat sensintif terhadap berkas cahaya hijau. Berkas cahaya pada panjang gelombang tersebut mengalami serapan yang cukup tinggi dan berbanding lurus terhadap besarnya kadar Rhodamin B. Alat yang dirancang telah dapat menunjukkan kemampuan untuk membedakan senyawa yang mengandung pewarna Rhodamin B atau tidak. Selain itu alat tersebut juga mampu menghitung perkiraan kadar Rhodamin B dalam satuan mol/liter. Persamaan konversi perubahan tegangan sensor dengan konsentrasi Rhodamin B adalah: konsentrasi (g/mL) = (tegangan sensor (mV) – 120,98) / (-1,967). Kata-kata kunci: Rhodamin B, LED RGB, pewarna sintetik. Abstract Rhodamine B is a synthetic dye used in the textile and paper industries. These substances are defined as prohibited substances in food through the Minister of Health 239/Menkes/Per/V/85. However, the Rhodamine B is commonly used in the foods by some people. Rhodamine B has an alkylating compounds (CH3-CH3) that are radially with binding proteins, fats and DNA in the body. Consumption of Rhodamine B in the long term can accumulate in the body and cause symptoms of an enlarged liver or kidney, impaired liver function, liver damage, physiological disorders of the body, and lead to liver cancer. In this research has been carried out the manufacture of the detector Rhodamine B which flexible and easy to operate on the basis of the RGB LEDs. Based on our experimental results, the Rhodamine B is very sensintif with the green light beam. Beam of light at these wavelengths is absorp by Rhodamin B which proportional to its concentration. Our equipment is designed to demonstrate the ability of distinguish between containing dye Rhodamine B or not. In addition, the equipment is able to calculate the concentration of Rhodamine B in mol / liter. The conversion equation of voltage to concentration of Rhodamine B is: concentration (g/mL) = (voltage-sensor (mV) – 120,98) / (- 1,967). Keywords: Rhodamin B, RGB LED, synthetic dye.
PENGUJIAN KANDUNGAN ZAT PEWARNA RHODAMIN B PADA BEBERAPA JENIS MAKANAN DENGAN MINI SPEKTROFOTOMETER ABSORPSI PORTABEL Nurul Halimah; Sri Suryaningsih; Jajat Y. Mindara; Sahrul Hidayat
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 5 (2016): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2016
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (702.886 KB) | DOI: 10.21009/0305020205

Abstract

Rhodamine is kind of synthetic dyes that are widely used in textile and paper industries. The use of these hazardous substances rhodamine in foods and beverages is carried out by the manufacturers / community. Health impacts cause irritation of the respiratory tract, skin, eye, gastrointestinal, hepatic dysfunction and liver cancer. Thus, it is needed a study to detect rhodamine-B compounds in some foods and beverages by using a portable tool for practical and without having to do in the laboratory. This research was conducted with the stage of collection and sample preparation, validation of analytical methods, then analyzes the content of rhodamine in the test sample using a UV-Vis spectrophotometer and LCD mini tool. Based on the test results showed that the samples had a strong absorption of the green and blue LED RGB with highly sensitive to changes in the value of concentration. The test results s of mini absorption spectrophotometer concentrations of Rhodamine-B values ​​in samples of sauce at the peak wavelength of 532 nm is 2.39684 x ​​10-5 M, the value of the concentration of Rhodamine-B in the jelly in the peak wavelength of 532 nm is 2.78781 x 10 -5 M, and the value of the concentration of Rhodamine-B syrup at the peak wavelength of 486 nm is 1.75088 x 10-5 M. Keywords: Rhodamine-B, absorption, dyes, spectrophotometers.
PENENTUAN UKURAN NANOPARTIKEL ZnO SECARA SPEKTROSKOPIK Yayah Yuliah; Sri Suryaningsih
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 5 (2016): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2016
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (880.001 KB) | DOI: 10.21009/0305020224

Abstract

At the nano scale the material properties depend on the size such that the characteristics of the materials can be engineered by controlling its size. Determining of the nano-particles size cannot be carried out easily because no available measuring instruments with accuracy in the order of nano which can be used directly. Electron microscope (TEM), which is considered as the most reliable tool in determining the size at the nano-scale is also not easy to accomplish. Indirect measurement method utilizing various spectrometers such as XRD, UV-Vis, and PL can be exploited to overcome this obstacle. In this study, the nano particles size was determined by analyzing the UV-Vis absorption spectra of materials via the effective mass model at the wavelength of the edge and the peak spectra’s. TEM Photos were used for confirmation. Three ZnO nano particles synthesized chemically used as the analyzed samples. Average particle size of each 4,92nm, 4.66 nm and 5,57nm were resulted by using the λedge of UV-Vis spectra’s whereas from the λpeak extracted 9.83 nm, 9,32nm and 11.3 nm of particles size respectively. TEM photograph show 7.2 nm, 6.31 nm and 26.37 nm average particle sizes for each ZnO sample. The results commonly are in the same order and particularly have similar trend. The overall results showed that the determination of nano particles size spectroscopycally make available informative results as an initial study. Keywords: nano size, spectroscopy, effective mass model.
RANCANG BANGUN SISTEM PENGUKURAN SUHU JARAK JAUH UNTUK SURVEY POTENSI ENERGI TERBARUKAN DI LINGKUNGAN KAMPUS UNPAD JATINANGOR Jajat Yuda Mindara; Sahrul Hidayat; Sri Suryaningsih; Norman Syakir; Wahyu Alamsyah
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 5 (2016): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2016
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (657.938 KB) | DOI: 10.21009/0305020615

Abstract

Universitas Padjadjaran as one of the academic institrusi has a vision to participate development potential of renewable energy. In the development of renewable energies in particular solar energy, data about the potential of the sector in the region is very compulsory. One of the potential energy that its data has not owned a solar thermal energy. One way of measuring system of temperature remote environment is to use the sensor in the terminal stored a few hundred meters from the computer of the recipient. As the process of sending and receiving data can be done by using a Modem FM. In this case the processing and data conversion transformation is the environmental temperature (T), follow by transformed of T to Voltage, then converted to frequency (V/F) and finally it is modulated. Existence of environmental temperature visualization on the computer screen as results of demodulasi, conversion of frequency to Voltage (F/V) and the conversion of Analog to Digital. In this study addressed the analysis of transformation and environmental temperature conversion to digital data with the design using a conditioned LM25 Tranducer to the Voltage (0 to 5) Volts comparable to (0 to 50) oC. Converter (V/F) and (F/V) vice versa is (0 to 5) Volts comparable to (0 to5000) Hz. And the conversion of analog to digital (0 to 65535) is proportional to the temperature. Based on its transformasion and the conversion state information designed normal temperature at between 24-27oC, state of heat above 27oC is hot and under 24 is cool Keywords: Temperature sensors, Converter (V/F), (F/V) FM, Modem, ADC.
RANCANG BANGUN ALAT PEMANTAU PENGGUNAAN ENERGI LISTRIK RUMAH TANGGA BERBASIS INTERNET Sri Suryaningsih; Sahrul Hidayat; Faisal Abid
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 5 (2016): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2016
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (652.361 KB) | DOI: 10.21009/0305020617

Abstract

Electrical energy is a necessity for human beings and the use of electrical energy which is pretty much contained in the household sector. Electricity used in the household sector amounted to 35% of the total electricity consumed in Indonesia every month. The savings in energy use in the household are the first step that can be done to anticipate the energy crisis. The purpose of research makes a tool that can monitor and calculate the power consumption used by an electronic device or in whole in a home can be performed remotely using the internet in data transmission, in which the electrical power used is displayed on a PC screen in a WEB site. The results have been made hardware design, software, web design and manufacture. Results of testing done by looking at household electrical power are seen at the web address compared results observed directly shows good accuracy. Keywords: household, electrical power, distance, WEB.
ANALISA SIFAT ADSORPSI LOGAM BERAT PADA ECENG GONDOK DALAM PENGELOLAAN AIR LIMBAH ELEKTROPLATING SRI SURYANINGSIH
Jurnal Material dan Energi Indonesia Vol 7, No 01 (2017)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (445.806 KB) | DOI: 10.24198/jmei.v7i01.12368

Abstract

Pertumbuhan penduduk dunia yang sangat cepat dan perkembangan industri yang semakin pesat menyebabkan semakin banyak bahan buangan yang bersifat racun yang dibuang ke lingkungan dalam bentuk limbah padat, cair dan gas. Limbah dalam bentuk cair yang ada dalam industri elektroplating sebagai proses elektrolisa yang menyisakan logam berat Fe, Cu dan Pb. Tanaman Eceng gondok (Eichornia Crassipes) dapat dimanfaatkan menjadi bahan adsorben yang merupakan tanaman gulma dengan waktu tumbuh sangat cepat, sehingga dapat mengganggu aliran perairan dan mempercepat pendangkalan perairan. Tujuan penelitian ini untuk mengetahui sifat adsorpsi eceng gondok pada limbah cair yang diperlakukan dalam variasi waktu perendaman selama 30, 60, dan 90 menit. Pengujian adsorpsi pada eceng gondok dengan metoda SEM-EDS (Scanning Elektron Microscopy-Energy Dispersive X-Ray Spectrocopy). Kandungan unsur logam optimal dari variasi waktu perendaman dari hasil SEM-EDS menunjukkan kadar logam Fe sebesar 2,453% pada waktu perendaman 60 menit dibandingkan dengan logam Cu, dan Pb. Nilai optimal pada proses adsorpsi eceng gondok dibandingkan dengan sifat absorpsi limbah elektroplating dengan menggunakan AAS sesuai, dimana semakin besar sifat adsorpsi eceng gondok maka semakin besar penurunan konsentrasi logam yang terkandung di dalam limbah cair elektroplating  sebesar 99,24%.
ANALISIS TEGANGAN TARIK BAJA API 5L X65 DENGAN VARIASI PEMBEBANAN PADA MEDIA KOROSI ASAM ASETAT DAN AIR LAUT SRI SURYANINGSIH; NENDI SUHENDI
Jurnal Material dan Energi Indonesia Vol 9, No 01 (2019)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1635.348 KB) | DOI: 10.24198/jmei.v9i1.23072

Abstract

Korosi merupakan jenis kerusakan yang rentan terjadi pada logam. Korosi sangat merugikan dalam dunia baja dan perpipaan, sehingga untuk meminimalisir kerugian akibat korosi perlu dikaji untuk mengetahui ketahanan pipa baja pada suatu lingkungan yang korosif (sweet gas). Sweet gas pada tekanan tinggi dapat menyebabkan korosi retak tegangan pada pipa. Tujuan penelitian ini  untuk mengetahui pengaruh variasi tegangan tarik yang diberikan pada baja karbon tipe API 5L X65 terhadap laju korosi di dalam larutan uji asam asetat glasial dan air laut. Hasil penelitian menunjukkan bahwa sampel baja yang diberi tegangan tarik dengan defleksi 2,9 cm menghasilkan laju korosi yang lebih tinggi dibandingkan sampel baja dengan defleksi 2,7 cm. Hal ini membuktikan bahwa semakin besar tegangan tarik yang diberikan semakin tinggi laju korosi, terlebih pada lingkungan asam asetat baja lebih korosif dibandingkan lingkungan air laut.Kata kunci : baja karbon, korosi retak tegangan, tegangan tarik, sweet gas.
Co-Authors ABDUL HARIS AFANDI, KOMALA A Affandi, Komala Affiyanti Annisa Aprilia ARIF BAGUS PRAKOSO Arwan Arwan Ayi Bahtiar CHOIRY GHINA AFRILIA DIKA REZA PAHLEVA Dinar Setiawidiani Edi Wibowo, Sarwo Faisal Abid Fauzi, Azra Fitri Yuliasari Handayani, Riska Tri Hardoyo Harjo Hardyanti Hardyanti, Hardyanti Irmha Chaerunnisa IRMHA CHAERUNNISA, IRMHA Jajat Y. Mindara Jajat Yuda Mindara Jajat Yuda Mindara JAJAT YUDA MINDARA, JAJAT Khoirima Ulfi KHOIRIMA ULFI, KHOIRIMA KOMALA A AFANDI Komala Affiyanti Affandi Lusi Safriani Mariah Kartawidjaja MUHAMMAD RIZKY NURAWAN Nendi Suhendi Norman Syakir Nur'itam, Nur'itam Nurmalia, Meli Nurul Halimah Nurwalidainismawati, Nurwalidainismawati Otong Nurhilal Otong Nurhilal Otong Nurhilal Otong Nurhilal Otong Nurhilal, Rukiah Paramita, Shanti PUSPITA MELATI ANGGRAENI Putri Aprilia Mulyani Ramdani, Nurlailatun Rara Amita Putri RARA AMITA PUTRI, RARA RESTI RAHAYU DWI AGUSTINI RIZKIA MUTIARA Sahrul Hidayat Sumarni Sumarni Supryanto, Try Taufiqurrahman, M. Tintan Rostina Tuti Susilawati Wahyu Alamsyah Wahyu Alamsyah Wardatunnissa, Yeni Yayah Yuliah Yayah Yuliah Yayah Yuliah, Yayah ZULHAMDANI ZULHAMDANI