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All Journal Jurnal Ilmu Dasar Jurnal Sains dan Teknologi JFA (Jurnal Fisika dan Aplikasinya) Science and Technology Indonesia SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Jurnal Kreativitas PKM JIEMS (Journal of Industrial Engineering and Management Systems) Jurnal Teori dan Aplikasi Fisika Piston: Journal of Technical Engineering Jurnal Fisika Indonesia Jurnal Pengabdian Kepada Masyarakat (JPKM) Tabikpun Journal of Energy, Material, and Instrumentation Technology RENATA Jurnal Pengabdian Masyarakat Kita Semua

Pulung Karo-Karo

Universitas Lampung

Author-ID : 295984

Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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Pengaruh Suhu Tinggi terhadap Karakteristik Keramik Cordierite Berbasis Silika Sekam Padi Sembiring, Simon; Manurung, Posman; Karo-Karo, Pulung
Jurnal Fisika dan Aplikasinya Vol 5, No 1 (2009)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

This study was carried out to investigate the effect of high temperature on the functional groups, microstructure and physical characteristics of cordierite ceramics obtained from an aqueous solution of magnesium nitrate hydrate ((Mg(NO3)2.6.12H2O)), aluminium nitrate hydrate (Al(NO3)2.9.15H2O) and silica sols extracted from rice husk. The samples were sintered at temperature of 1000â—¦C, 1200â—¦C and 1400â—¦C. Functional groups and microstructural characteristics of cordierite ceramics were examined by FTIR and SEM, respectivelly. FTIR study shows that the absence of the vibration bands of Na-OH, Si-OH, C-O, Si-O-Si on the samples. However, the formation of cordierite structure was dominated on this high temperature. Microstructure results confirmed the presence of irregular morphology of the solid and compact phases. In addition, the densities, shrinkage andhardness of cordierite increase significantly with increasing temperature, but porosity decreases with increasingtemperature.

Efek Penambahan Fe3Mn7 Terhadap Sifat Fisis dan Mekanik α-Fe2O3 Eko Arief Setiadi; Wini Rahmawati; Pulung Karo Karo; Muhammad Yunus; Perdamean Sebayang
Piston: Journal of Technical Engineering Vol 1, No 1 (2017)
Publisher : Prodi Teknik Mesin

Preparasi dan karakterisasi pellet α-Fe2O3 dengan penambahan 0, 2, 5 dan 10 %wt. Fe3Mn7 berbasis pada material alam telah berhasil dilakukan. Proses pencampuran serbuk α-Fe2O3 dan Fe3Mn7 dilakukan dengan menggunakan HEM. Kemudian campuran serbuk dikasinasi pada suhu 1000 ºC, dikompaksi pada 69 Pa hingga menjadi pellet dan disinter pada suhu 1000 ºC. Karakterisasi XRD menunjukkan adanya fasa dominan α-Fe2O3 dan fasa baru MnO2 dan Fe3O4. Densitas dan kekerasan sampel meningkat secara linier seiring dengan kenaikan komposisi Fe3Mn7 yang ditambahkan. Sampel optimum diperoleh pada sampel α-Fe2O3/10 %wt. Fe3Mn7 dengan nilai bulk density dan kekerasan masing-masing 4,98 g/cm3 and 994,94 HV. Sampel ini termasuk dalam klasifikasi hard magnet dengan nilai magnetisasi saturasi, remanen dan koersivitas masing-masing sebesar 24,0 emu/g, 10,3 emu/g dan 571,8 Oe.

Coal Ash Characteristic from Bukit Asam as Raw Material for Ceramics Production Pulung Karo-Karo; Simon Sembiring
Jurnal ILMU DASAR Vol 9 No 2 (2008)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1323.743 KB)

This study was carried out to characterize coal ash obtained from Bukit Asam, Tarahan Lampung, after the samples were sintered at various temperatures ranging from 900C - 1300C. The characteristics of the investigated samples included density, porosity, hardness, structure and microstructure. The results indicated that porosity decreased with increasing sintering temperature, while density and hardness increased with increasing temperature. The x-ray diffraction (XRD) study revealed that the main crystalline phase was silicon dioxide (SiO2), with the minor constituents of CaSiO2, MgSiO3, FeSiO4 and Ca12Al14O33. SEM investigations clearly demonstrated the presence of a fine crystallised phase dispersed in the microstructure.

Pengaruh Variasi Waktu Sintering Terhadap Pertumbuhan Fase Bahan Superkonduktor BSCCO-2212 dengan Kadar Ca=1,10 Menggunakan Metode Pencampuran Basah Karlina Rahmah; Suprihatin Suprihatin; Pulung Karo Karo
Journal of Energy, Material, and Instrumentation Technology Vol 1 No 1 (2020): Journal Of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

This research was conducted to determine the effect of sintering time on the formation of the superconducting phase BSCCO-2212 by calculating the level of purity of the phases formed and looking at the microstructure. The variation of sintering time was 10, 20, 30 and 40 hours using the wet mixing method. The sample was calcinated with 800 °C for 10 hours and sintered with 830 °C. The XRD’s characterization result shows a decrease in phase purity with increasing the sintering time. The relative high volume fraction of the BSCCO-2212/ts10 sample is 90,48% while, the lowest volume fraction of BSCCO-2212/tc40 is 50,74%. The relative high orientation degree of BSCCO-2212/ts20 is 18,47% and the lowest orientation degree of BSCCO-2212/ts10 is 8,4%. The SEM’s characterization result shows of all samples have been oriented and have relatively little space between slabs (voids).

Analisis Batubara Jenis Antrasit di PTBA Berdasarkan Kandungan Volatile Matter dan Kalori Yohanes W.M Purba; Pulung Karo Karo; Ediman Ginting
Journal of Energy, Material, and Instrumentation Technology Vol 1 No 1 (2020): Journal Of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

This research Coal is one of the sedimentary fossil fuels that can ignite, is formed from organic sediment, and the remains of plants are then formed through the process of coalification. The main element consists of carbon, hydrogen, and oxygen. The formation of coal has certain conditions and only occurs in certain eras throughout geological history. The carbon age was approximately 340 million years ago. In the Permian Age or the Paleozoic era, 270 million also formed the most productive coal which is almost the entire coal deposit (black coal) in other parts of the earth. In this study we conducted at the Laboratory of PT. Bukit Asam tbk. Observation Results in the Study of Average Volatile Matter 19.11, Max Volatile Matter value 38.34, Min Vollatie Matter value 11.34. And the Average Calorie Result of 7578.5 Kacl / Kg, Max Calorie Value of 8046 Kcal / Kg. In this study, it was proved that coal samples were Anthracite types.

Pengaruh Variasi Polivinilpirolidon (PVP) Terhadap Pembentukan Serat Nano TiO2 Menggunakan Metode Electrospinning Vega Rahmawati Ar; Posman Manurung; Junaidi Junaidi; Pulung Karo Karo
Journal of Energy, Material, and Instrumentation Technology Vol 2 No 1 (2021): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Research on the formation of TiO2 nanofiber has been carried out with PVP variations of 1.1; 1,2; 1.3; 1.4 and 1.5 grams using electrospinning. This study aims to determine the effect of PVP variation on the viscosity and morphology of TiO2 nanofibers and to determine the crystal structure of the fibers. Synthesis of TiO2 was carried out using the sol-gel method. TTIP is used as a precursor, ethanol as a solvent, acetic acid as a catalyst and PVP as a fiber-forming polymer. The results of the viscosity measurement show that the amount of PVP used in the sample is directly proportional to the level of solution viscosity. Based on the results of SEM characterization, it showed relatively uniform nanofiber morphology with fiber diameter ranging from 94 nm - 735 µm. The results of TEM characterization showed that the size of TiO2 nanofiber particles ranged from 7-15 nm. The results of XRD analysis showed that the crystal structures formed at a calcination temperature of 450 oC were the anatase and rutile phases.

Analisis Pertumbuhan Fase Superkonduktor BSCCO-2212 dan BPSCCO-2212 Akibat Variasi Suhu Sintering Menggunakan Metode Pencampuran Basah Pulung Karo Karo; Risky Putra Ramadhan; Suprihatin Suprihatin; Yanti Yulianti
Journal of Energy, Material, and Instrumentation Technology Vol 2 No 4 (2021): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v2i4.77

The research was conducted to determine the effect of sintering temperature on the level of purity of the superconducting phase BSCCO-2212 and BPSCCO-2212 using the wet mixing method. Sintering was carried out for 20 hours with variations in sintering temperature: 825, 830, 835 and 840°C. XRD results showed that the phase purity level increased until it reached the optimum point at 835°C sintering temperature and then decreased at 840°C. The highest volume fraction of the BSCCO-2212 sample was obtained at a sintering temperature of 835°C at 71.09% and the highest degree of orientation was obtained at a sintering temperature of 830°C at 26.44%. In the BPSCCO-2212 sample, the highest volume fraction was obtained at a sintering temperature of 835°C at 52.59% and the highest degree of orientation at a sintering temperature of 830°C at 43.49%. The results of the comparison of BSCCO-2212 and BPSCCO-2212 samples showed that the BPSCCO-2212 sample had a higher level of phase purity than BSCCO-2212.

EKSTRAK DAUN SAWO (Manilkara zapota L) SEBAGAI INHIBITOR TERHADAP LAJU KOROSI BAJA AISI 1018 DALAM MEDIUM KOROSIF NaCl 3% Riski Wulan Sari; Ediman Ginting Suka; Pulung Karo Karo
Journal of Energy, Material, and Instrumentation Technology Vol 3 No 1 (2022): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v3i1.86

This research aims to determine the effectiveness of sapodilla leaf extract (Manilkara zapota L) as inhibitor on AISI steel in corrosive medium NaCl 3 %. Specifically, the purpose of this research is to know the effect of the addition of 0%, 2% and 4% inhibitor concentration of sapodilla leaf extract and 3 days, 6 days and 9 days to the corrosion rate. To find out the corrosion rate resulted by weight reduction method with an inhibitor efficiency value of 59,2%. The x-ray diffraction (XRD) results show that the phase formed is pure Fe phase. The results of scanning electron microscopy (SEM) show the presence of lumps on steel surfaces of various sizes which are the product of corrosion. This is reinforced by the results of energy dispersive spectroscopy (EDS) which shows that the increasing number of lumps on the steel surface leaves fewer Fe elements.

Edukasi dan Pendampingan Pembuatan Hand Sanitizer Berbasis Ekstrak Daun Sirih Piper Betle L. Iqbal Firdaus; Simon Sembiring; Pulung Karo Karo
Jurnal Kreativitas Pengabdian Kepada Masyarakat (PKM) Vol 5, No 6 (2022): Volume 5 No 6 Juni 2022
Publisher : Universitas Malahayati Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33024/jkpm.v5i6.6103

ABSTRAK Kegiatan Pengabdian kepada Masyarakat ini merupakan bentuk pengemnagnag dalam memanfaatkan daun sirih sebagai hand sanitizer. Kegiatan ini bertempat si Desa Hajimena Kecamatan Natar Lampung Selatan dengan jumlah peserta 33 orang. Daun sirih banyak dijumpai di pekarangan rumah warga dan potensi sebagai antiseptik namun belum dimanfaatkan dengan baik dan budaya cuci tangan dengan baik dan benar sesuai anjuran WHO masih kurang. Permasalahan tersebut mendorong untuk membina masyarakat guna mengelola potensi daun sirih sebagai salah satu tanaman obat keluarga yang dapat dimanfaatkan potensinya untuk pencegahan penyebaran Covid-19 dan memberikan edukasi serta bimbingan teknis untuk membuat hand sanitizer dari ekstrak dauh sirih dikombinasikan dengan formula World Health Organization (WHO) dengan menerapkan teknik yang sederhana sehingga warga dapat mengolahnya secara mandiri, hasilnya masyarakat telah mampu membuat hand sanitizer sendiri, serta bisa mencuci tangah dengan baik dan benar, didukung dengan terjadi peningkatan pencapaian TIK sebelum kegiatan pengabdian adalah 37,67 %. Kemudian, setelah diadakan kegiatan pengabdian terjadi peningkatan pencapaian TIK menjadi 82,32 %. Hal ini menunjukkan bahwa terjadi peningkatan pengetahuan masyarakat tentang pembuatan hand sanitizer berbasis ekstrak daun sirih. Kata kunci: Daun sirih, Hand Sanitizer, Covid-19, World Health Organization ABSTRACT Pengabdian kepada Masyarakat activity is a form of development in utilizing betel leaf as a hand sanitizer. This activity took place in Hajimena Village, Natar District, South Lampung with 33 participants. Betel leaves are often found in people's yards and have potential as an antiseptic but have not been used properly and the culture of washing hands properly and correctly according to WHO recommendations is still lacking. These problems encourage the community to manage the potential of betel leaf as one of the family medicinal plants whose potential can be utilized to prevent the spread of Covid-19 and provide education and technical guidance to make hand sanitizers from betel leaf extract combined with the World Health Organization (WHO) formula. by applying a simple technique so that residents can process it independently, the result is that the community has been able to make their own hand sanitizer, and can wash their hands properly and correctly, supported by an increase in ICT achievement before service activities was 37.67%. Then, after the service activities were held, there was an increase in ICT achievement to 82.32%. This shows that there is an increase in public knowledge about the manufacture of hand sanitizers based on betel leaf extract. Keywords: Betle Leaf, Hand Sanitizer, Covid-19, World Health Organization

Sintesis dan Karakterisasi Fasa Crystoballite Berbasis Silika Sekam Padi dengan Metode Sintering (Solid State) Pulung Karo-Karo; Simon Sembiring
JIEMS (Journal of Industrial Engineering and Management Systems) Vol 2, No 2 (2009): Journal of Industrial Engineering and Management Systems (JIEMS)
Publisher : Universitas Bunda Mulia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30813/jiems.v2i2.66

This study was carried out to characterize the formation of crystoballite crystall of silica extracted from rice husk by sintering. Extraction of silica using 5% KOH and 10% HCl solution was sintered at 750, 900, 1000,and 1100 C. The products were characterised in term of functional groups, microstructure and structure (FTIR, SEM and XRD). Characterisation of the silica using FTIR shows the presence of silanol and siloxane. XRD results confirmed that silica amorph was formed at 750C, through the intermediate formation of crystoballite 900, 1000, and 1100C. The formation of crystoballite structure increases with increasing temperature of sintering, which confirms the presence of regular particle size using SEM analysis.Keywords: Rice Husk, Silica, Crystoballite, FTIR, SEM and XRD

Co-Authors Abdurrahman, Ahmad Faruq Achmad Shofi Agus Riyanto Ahmad Faruq Abdurrahman Ahmad Saiful Munir Alfi Hamidah Amilia Rasitiani Amir Supriyanto Anggun Mersilia Anton Sapto Handoko Aprilia, Ayu Apriliana Apriliana Aris Pratama Ayu Aprilia Bambang Joko Suroto Birawidha, David Candra Candra Kurniawan Delfi Oktavia Amrani Dwi Asmi Ediman Ginting Ediman Ginting Ediman Ginting Ediman Ginting Ediman Ginting Ediman Ginting Suka Ediman Ginting Suka Eko Arief Setiadi Elsa Mega Puspitaratu Fajar Nurjaman Fitri Fitri Gurum Ahmad Pauzi Herullah Herullah Indah Pratiwi Indriyawati, Agapetalia Intan Wandira Iqbal Firdaus Ismi Nurhayati Isnugroho, Kusno Iwan M Ridwan Jayanti Pusvitasari Jennifer Kapriati Pakpahan Junaidi Junaidi Junaidi Junaidi Karlina Rahmah Malik, Daffa Abdul Mareli Telaumbanua Marjunus, Roniyus Muhammad Amin Muhammad Amin Muhammad Nursani Muhammad Rizki Muhammad Yunus Nabilah Rafidiyah Nia Diana Nindia Agustin Oktaviando, Fany Oktivianty, Shella Windi Parmadean Subayang Pauzi, Gurum Ahmad Perdamean Sebayang Posman Manurung R Rosalina Rianita Nurhasanah Rio Orlando Pratama Riski Wulan Sari Risky Putra Ramadhan Rizky Damayanti Rudy T M Situmeang S Suprihatin Sembiring, Simon Shella Windi Oktivianty Simon Sembiring Simon Sembiring Simon Sembiring Simon Sembiring Slamet Sumardi, Slamet Sri Harjanti Suci Pangestuti Sudibyo Sudibyo Suprihatin Suprihatin Suprihatin Suprihatin Suprihatin Suprihatin Suprihatin Suprihatin Supriyanto, Amir Sutopo Hadi Syafriadi Syafriadi Syafriadi Syafriadi Syah, Aminudin Telaumbanua, Syukur Trianasari Trianasari Trianasari, Trianasari Vega Rahmawati Ar Wahyuningsih Wahyuningsih Wasinton Simanjuntak Wasinton Simanjuntak Wini Rahmawati Wisnu Ari Adi Yanti Yulianti Yanti Yulianti Yanti Yulianti Yayat Iman Supriyatna Yayat Iman Supriyatna Yohanes W.M Purba Yusup Hendronursito, Yusup Zahra Maria Ulfa

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