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All Journal Jurnal Ilmu Dasar BERKALA SAINSTEK Rekayasa: Jurnal Penerapan Teknologi dan Pembelajaran JFA (Jurnal Fisika dan Aplikasinya) UNEJ e-Proceeding Jurnal Fisika FLUX Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Pendidikan Fisika dan Keilmuan (JPFK) Spektra: Jurnal Fisika dan Aplikasinya Warta Pengabdian Jurnal Ilmu Fisika Indonesian Physical Review Computational and Experimental Research in Materials and Renewable Energy (CERiMRE) Dedikasi: Jurnal Pengabdian kepada Masyarakat Newton-Maxwell Journal of Physics Sewagati Jurnal Sains Materi Indonesia
Wenny Maulina, Wenny
Jurusan Fisika, Fakultas Matematika Dan Ilmu Pengetahuan Alam, Universitas Jember
Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Public Health Social Sciences Other

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KAJIAN MEMBRAN KOMPOSIT NILON-ARANG MELALUI KARAKTERISASI FTIR DAN SEM Maulina, Wenny
Jurnal Pendidikan Fisika dan Keilmuan (JPFK) Vol 2, No 1 (2016)
Publisher : UNIVERISTAS PGRI MADIUN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (73.648 KB) | DOI: 10.25273/jpfk.v2i1.25

Abstract

Telah berhasil dilakukan sintesis mermbran komposit nilon-arang dengan menggunakan bahan dari limbah benang nilon dan arang ampas tebu. Hasil penelitian menunjukkan bahwa membran komposit nilon-arang dengan bobot benang nilon 6,0 g dan arang 0,75 g adalah yang paling baik karena larutan yang terbentuk homogen, kental, mudah dicetak, permukaan membran halus dan tidak terdapat rongga udara. Berdasarkan karakterisasi FTIR pada membran komposit nilon-arang memperlihatkan adanya gugus fungsi hidrokarbon yang berasal dari arang ampas tebu dan gugus fungsi amida yang berasal dari benang nilon.Sehingga membran yang terbentuk masih memiliki komponen asli penyusunnya. Sedangkan dari karakterisasi SEM terlihat bahwa morfologi permukaan membran komposit nilon-arang yang dihasilkan termasuk membran mikrofiltrasi dengan ukuran pori 4,75 μm.
Thermoelectric Generator Module as An Alternative Source Of Electrical Energy in Rural Areas Arkundato, Artoto; Jatisukamto, Gaguk; Misto, Misto; Maulina, Wenny; Syah, Khalif Ardian
Rekayasa : Jurnal Penerapan Teknologi dan Pembelajaran Vol 18, No 1 (2020): July
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/rekayasa.v18i1.23691

Abstract

It has been done  a research to design a heat-to-electric converter as an alternative electrical energy source based on the thermoelectric generator devices that can convert the heat into the DC electricity. This research aims to determine the optimal operating temperature range to produce the thermoelectric generator’s output voltage as the desired conversion module. The developed conversion module uses the Seebeck effect by applying four thermoelectric generators arranged in an electrical circuit series. The electric current in thermoelectric generator occurs under the Seebeck effect due to the temperature difference between the two metal chips in the thermoelectric generator module. Candles were used as a heat source of thermoelectric generator module, while water is used for cooling. The results showed that the application of thermoelectric generator technology had produced an electrical voltage of about 5 volts. The thermoelectric generator’s operating temperature around 100 ºC, and the temperature of the water cooling medium was maintained at around 30 ºC so that there is a correlation with a temperature difference of about 70 ºC between the two sides of the thermoelectric generator chips. The electrical voltage that occurs could be used as a source of electrical energy for any purposes.
Thermoelectric Generator Module as An Alternative Source Of Electrical Energy in Rural Areas Arkundato, Artoto; Jatisukamto, Gaguk; Misto, Misto; Maulina, Wenny; Syah, Khalif Ardian
Rekayasa : Jurnal Penerapan Teknologi dan Pembelajaran Vol 18, No 1 (2020): July
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/rekayasa.v18i1.23691

Abstract

It has been done  a research to design a heat-to-electric converter as an alternative electrical energy source based on the thermoelectric generator devices that can convert the heat into the DC electricity. This research aims to determine the optimal operating temperature range to produce the thermoelectric generator’s output voltage as the desired conversion module. The developed conversion module uses the Seebeck effect by applying four thermoelectric generators arranged in an electrical circuit series. The electric current in thermoelectric generator occurs under the Seebeck effect due to the temperature difference between the two metal chips in the thermoelectric generator module. Candles were used as a heat source of thermoelectric generator module, while water is used for cooling. The results showed that the application of thermoelectric generator technology had produced an electrical voltage of about 5 volts. The thermoelectric generator’s operating temperature around 100 ºC, and the temperature of the water cooling medium was maintained at around 30 ºC so that there is a correlation with a temperature difference of about 70 ºC between the two sides of the thermoelectric generator chips. The electrical voltage that occurs could be used as a source of electrical energy for any purposes.
Uji Aktivitas Antibakteri dan Permeabilitas Membran Hibrid Nilon-TiO2 wenny maulina
Jurnal Fisika dan Aplikasinya Vol 15, No 3 (2019)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (677.557 KB) | DOI: 10.12962/j24604682.v15i3.4625

Abstract

Hybrid membranes from nylon and titanium dioxide (TiO2) were prepared using hydrogen chloride (HCl) as precursor and acetyl aceton as chelating agent in the casting solution by phase inversion methods. The aim of this study was investigated antibacterial effect and permeation flux due to the impact of TiO2 contents on the hybrid membranes. Among all the prepared membranes, nylon-TiO2 hybrid membranes with mass fraction 70wt%:30wt% exhibited the best antibacterial effect. Meanwhile, the additions of TiO2 were raised water and sodium chloride (NaCl) permeability from 0 to 40wt%.
The Study of Electrical Conductance Spectroscopy of The Inner membrane of Salak Wenny Maulina
UNEJ e-Proceeding 2016: Proceeding The 1st International Basic Science Conference
Publisher : UPT Penerbitan Universitas Jember

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Abstract

Main objective of the present work was to investigate mechanism transport of the inner membrane of salak (Salacca edulis) using electrical conductance measurements. The inner thin membrane obtain after removing the outer cover of salak has been found to record electrical conductance when it separates two different concentration of electrolyte solution; NaCl, MgCl2 and CaCO3. Conductance values were measured for each concentration at different temperature. The temperature range studied is between 303 K and 333 K at 5 K intervals. The normal behaviour of these conductance shows that the values increase smoothly with increase in concentration. The magnitude follow the order Mg2+ > Na+ > Ca2+. The increase of temperature makes mobilisation of the ions was rapidly during the measurement of conductance.
Biobriket Arang Sekam Padi sebagai Sumber Energi Terbarukan untuk Aplikasi Pandai Besi Wenny Maulina; Yudi Aris Sulistiyo; Endhah Purwandari
Warta Pengabdian Vol 14 No 4 (2020): Warta Pengabdian
Publisher : LP2M Universitas Jember

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Abstract

Sumber energi terbarukan berbasis biomassa merupakan sumber daya potensial menggantikan kayu bakar atau batu bara yang persediannya semakin menipis sebagai bahan bakar industri pandai besi. Salah satu potensi biomassa adalah sekam padi yang dapat dijadikan bahan baku pembuatan biobriket. Oleh karena itu, tujuan pelaksanaan kegiatan ini adalah untuk menghasilkan biobriket arang sekam padi sebagai bahan bakar alternatif pada industri pandai besi. Kegiatan ini dilakukan dalam beberapa tahapan yaitu 1) pembuatan alat pencetak yang mampu menghasilkan 4 buah biobriket sekali produksi, 2) pembuatan biobriket arang sekam dan diuji sifat dan karakteristiknya, dan 3) pelatihan pembuatan dan penerapan langsung biobriket untuk proses pemanasan besi pada industri pandai besi. Karakteristik biobriket arang sekam diuji berdasarkan nilai kapasitas kalor, kadar air, kadar abu, dan volatile matter berturut–turut adalah 3709,47 kalori per gram; 4,27%; 3,93%; dan 59,20%. Hasil pengujian pembakaran secara langsung menghasilkan nyala api berwarna biru dengan suhu berkisar 533,8 – 704,3 oC. Hasil biobriket telah diimplementasikan dan mampu diterima untuk menggantikan kayu bakar yang selama ini digunakan pada sentra pengrajin pandai besi di Desa Suger Kidul, Kec. Jelbuk, Kab. Jember.
STUDY OF NYLON MEMBRANE AS A FILTER FOR CLARIFICATION OF SUGARCANE JUICE Wenny Maulina; Ismia Khilmi Fauzia; Misto Misto
Spektra: Jurnal Fisika dan Aplikasinya Vol 3 No 1 (2018): SPEKTRA: Jurnal Fisika dan Aplikasinya, Volume 3 Issue 1, April 2018
Publisher : Program Studi Fisika Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (272.868 KB) | DOI: 10.21009/SPEKTRA.031.08

Abstract

Abstrak Membran nilon merupakan lapisan semipermeabel yang terbuat dari jenis polimer poliamida untuk memisahkan partikel tertentu dari larutannya. Pada artikel ini, membran nilon berperan sebagai filter untuk penjernihan nira tebu dengan mengkaji kinerja, efektivitas, dan efisiensi membran. Penelitian dilakukan dengan sistem aliran dead-end pada proses ultrafiltrasi menggunakan empat tekanan transmembran yang berbeda yaitu 1.0, 1.5, 2.0, dan 2.5 bar. Konsentrasi nira tebu sebelum dan sesudah proses ultrafiltrasi dikarakterisasi menggunakan Spektrofotometer UV-Vis. Membran nilon dengan variasi massa 4.5, 5.0, 5.5, 6.0, dan 6.5 gram, menunjukkan fluks air yang sesuai pada rentang 15 – 38 L/m2.jam.bar pada tekanan transmembran. Hasil penelitian menunjukkan bahwa membran nilon yang memiliki kinerja paling baik adalah membran dengan massa benang nilon 4.5 gram karena memiliki nilai fluks paling besar dan nilai koefisien rejeksi paling kecil. Membran dengan massa benang nilon 6.5 gram memiliki efektivitas dan efisiensi penurunan sukrosa yang paling besar. Sedangkan membran dengan massa benang nilon 4.5 gram memiliki efektivitas dan efsiensi penurunan konsentrasi sukrosa yang paling rendah. Kata-kata kunci: membran nilon, nira tebu, kinerja membran, efektivitas, efisiensi. Abstract Nylon membrane is a semipermeable layer made of a type of polyamide polymer to separate certain particles from the solution. In this article, nylon membrane is presented as a filter for clarification of sugarcane juice concerning study on performance evaluation, effectiveness, and efficiency of the membrane. The experiments were conducted according to the principle of the dead-end in an ultrafiltration process using four different transmembrane pressures of 1.0, 1.5, 2.0, and 2.5 bar. The concentration of sugarcane juice before and after ultrafiltration process was characterized using UV-Vis Spectrophotometer. Nylon membranes, which consist of 4.5, 5.0, 5.5, 6.0, and 6.5 gram various mass, showed matched water flux in the range of 15 – 38 L/m2.jam.bar at the transmembrane pressures. The results showed that the best performance nylon membrane was a nylon membrane with a mass of 4.5 gram nylon, because it has the largest flux and the smallest rejection coefficient. Nylon membrane with a mass of 6.5 gram has the biggest effectiveness and efficiency in the reduced of sucrose concentration. Meanwhile, nylon membrane with a mass of 4.5 gram has the lowest effectiveness and efficiency in the reduced of sucrose concentration. Keywords: nylon membrane, sugarcane, membrane performance, effectiveness, efficiency.
ENHANCEMENT OF THE NUTRITIONAL AND INCOME OF THE MRAWAN VILLAGE COMMUNITY THROUGH ECO-FRIENDLY QUAIL POULTRY LIVESTOCK AT LOW COST Wenny Maulina; Yuda Cahyoargo Hariadi; Arry Yuariatun Nurhayati; Misto Misto
UNEJ e-Proceeding 2022: E-Prosiding Kolokium Hasil Penelitian dan Pengabdian kepada Masyarakat
Publisher : UPT Penerbitan Universitas Jember

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Abstract

The yard can provide great benefits for the community, because it can be planted with vegetables, fruits and spices such as turmeric, lemongrass, etc. The yard can also be used as a source of animal protein and an additional source of family income. Quail farming is an alternative for producing eggs which is quite productive in addition to laying hens and ducks. The advantages of quail cultivation are having a small body size and weighing about 130 grams, a short life cycle, high egg productivity (in the peak period of daily egg production it can produce about 90% of the total population in the cage), low feed intake (about 20 grams/quail/day), easy to cultivate and does not require a high investment. Quail can give results in the form of daily egg production and/or meat from rejected quail (quail that have stopped laying eggs or egg productivity that begins to decline after about 8 months of age). Quail cultivation from the yard of the house can be used to maintain approximately 25 quails. Based on these advantages, quail cultivation in the yard can provide family income and increase nutrition. Keywords: quail, yard, nutritional, income
Rigid Procedure to Calculate the Melting Point of Metal Using the Solid-Liquid Phase (Coexistence) Method Artoto Arkundato; Wenny Maulina; Lutfi Rohman; Ratna Dewi Syarifah; Mohammad Ali Shafii
Jurnal Ilmu Fisika Vol 14 No 2 (2022): September 2022
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jif.14.2.132-140.2022

Abstract

Melting point, particularly metal, is one of the important data for many applications. For developing new materials, adequate theories for melting point are very crucial. The determination of melting point using the popular phase-change curve method is very easy but usually overestimate. In current work, we determine the melting point of a pure metal (iron) using the method of solid-liquid phase coexistence. For this goal, molecular dynamics simulation was applied to obtain data of trajectories of atoms. Simulation (LAMMPS) and data analysis (OVITO) procedures are strictly applied to obtain the accurate melting point of iron based on the obtained trajectories data. For initial structure design of simulation, we used the ATOMSK program. The melting point of iron obtained using the phase change curve (PCC) method is about 2750 K < TPCC < 3250 K and using the coexistence phase (CP) method is TCP = 2325 K. A more accurate calculation needs to include defects factor in the simulated material and calculation. In this research we use the Morse potential to represent all of the atomic interaction among atoms of Fe material.
Effect of Nylon Membrane Thickness on the Value of Sound Transmission Loss as an Alternative Insulation Material Wenny Maulina; Totok Wicaksono; Agung Tjahjo Nugroho
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat Vol 20, No 2 (2023): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/flux.v20i2.12810

Abstract

Measurements of sound transmission loss have been successfully carried out on various thicknesses of nylon membrane as an absorbing material. Nylon membrane were prepared using hydrogen chloride (HCl) and acetyl aceton in the casting solution by phase inversion methods. Nylon membrane with different thickness used in this reseach were 1 mm, 2 mm, 3 mm, 4 mm, and 5 mm. Measurement of sound transmission loss was carried out using a reverberation chamber with sound frequencies of 125 Hz, 250 Hz, 500 Hz, 1000 Hz, 2000 Hz, 4000 Hz. The results show that, with the increase of thickness of nylon membrane, sound transmission loss of nylon membran was improved. The sound transmission loss of nylon membrane with thickness of 4 mm is the best, whose sound trasnmission loss was up to 46.39 dB at 4000 Hz. This nylon membrane is suitable for lightweight sound barriers and is promising and worthy of further study.
Co-Authors Agung Tjahjo Nugroho Arry Yuariatun Nurhayati Artoto Arkundato Edy Wibowo Endhah Purwandari Gaguk Jatisukamto Ghiffari, Mochammad Habibah, Putri Sifa Helda Wika Amini Hidayat, Umar Sahiful Ismia Khilmi Fauzia Jamaluddin, J. Karomah, Iklimatul Kusumaningtyas, Rani Lutfi Rohman Ma'rifah, Binti Ni'matul Maulana, Rija Rizqi Misto Misto Misto Misto Mohammad Ali Shafii Nindha Ayu Berlianti Nindha Ayu Berlianti Prasetyani, Tiana Febrianti Eka Priyanto, Frendi Wahyudi Rija Rizqi Maulana Setiawan, Dimas Arif Shofa, Ghaitsa Zhahira Sholihah, Athaya Farras Sujito Sujito Sujito Sujito Sukmawati, Nissa Supriyadi Supriyadi Sutisna Sutisna Sutisna Sutisna Syah, Khalif Ardian Syaifullah, Rangga Yudha Syarifah, Ratna Dewi Totok Wicaksono Trianti, Nuri Widiasih Wika Amini, Helda Yuda Cahyoargo Hariadi Yudi Aris Sulistiyo, Yudi Aris