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Nasruddin
Mechanical Engineering Department, Faculty Of Engineering University Of Indonesia, Depok 16424, Indonesia
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Karakteristik briket dari tongkol jagung dengan perekat tetes tebu dan kanji Nasruddin .; Risman Affandy
Jurnal Dinamika Penelitian Industri Vol 22, No 2 (2011): JURNAL DINAMIKA PENELITIAN INDUSTRI
Publisher : Balai Riset dan Standardisasi Industri Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3140.208 KB) | DOI: 10.28959/jdpi.v22i2.541

Abstract

The research objective is to study the briquette characteristics produced from pressing process with sugarcane molasses and tapioca flour adhesives. Materials used in this study were 20 mesh corn stem, sugarcane molasses adhesive and tapioca flour adhesives. The treatments were consisted of briquettes without adhesive, briquettes with 4% and 7% sugarcane molasses adhesive as well as briquettes with 4% and 7% tapioca flour adhesive respectively using 20 gram of corn stem. The pressing for corn stem into briquettes was conducted by using pressure of 1, 2, 3, 6 and 10 tonf. The tested parameters for briquettes were water content by using gravimetric method, specific gravity by using gravimetry method and calory value by using bomb calorimeter. The results showed that treatment of 20 gram corn stem with 7% tapioca flour adhesive at 10 tonf pressure had water content of 6.245%, specific gravity of 1.31 g/cm3 and calory value of 4.791 calory/g, respectively.Keywords : Corn stem, sugarcane molasses adhesive, tapioca flour adhesive, briquette AbstrakPenelitian ini bertujuan untuk mempelajari karakteristik briket yang dihasilkan dari proses pengempaan dengan perekat tetes tebu dan perekat kanji. Bahan yang digunakan terdiri dari tongkol jagung ukuran 20 mesh, perekat tetes tebu dan perekat kanji. Briket yang dihasilkan merupakan variasi perlakuan tanpa bahan perekat, dengan perekat tetes tebu 4% dan 7% dari 20 gram berat tongkol jagung, dan dengan bahan perekat kanji 4% dan 7% dari 20 gram berat tongkol jagung. Proses pengempaan tongkol jagung menjadi briket dilakukan pada gaya tekan pengepresan dengan variasi gaya tekan 1, 2, 3, 6, dan 10 tonf. Pengujian briket meliputi kadar air dengan metode oven, berat jenis dengan metode gravimetri dan nilai kalor dengan bomb kalorimeter. Hasil uji menunjukkan untuk perlakuan 20 gram tongkol jagung menggunakan perekat kanji 7% pada gaya tekan pengempaan 10 tonf mengandung kadar air 6,245%, berat jenis 1,31 g/cm3 dan nilai kalor 4.791 kal/g.Kata Kunci : Tongkol jagung, tetes tebu, kanji, briket
THE DESIGN AND TESTING OF ADSORPTION REFRIGERATION SYSTEM WITH TWO ADSORBERS Andi Taufan; Nasruddin Nasruddin
Widyariset Vol 16, No 2 (2013): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (323.233 KB) | DOI: 10.14203/widyariset.16.2.2013.269-276

Abstract

This paper discusses design and testing of adsorption refrigeration system with two adsorbers. Main components consisted of two adsorber with 6.6 kg solidified activated carbon inside, expansion valve, evaporator, condenser, and reservoir. All of that were connected with stainless steel pipes. The test performed for 75 minutes using 250 ml of methanol pro-analysis of 99.9% as a refrigerant in the system and the water temperature is 250C which is pumped through copper pipes to cool the adsorbents. The air pressure in the system during the test were in vacuum. The average pressure difference between the adsorber and the evaporator during testing was 4.6 cmHg. The lowest temperature was 140C obtained after the 65th minute.
THE DESIGN AND TESTING OF ADSORPTION REFRIGERATION SYSTEM WITH TWO ADSORBERS Andi Taufan; Nasruddin Nasruddin
Widyariset Vol 16, No 2 (2013): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (323.233 KB) | DOI: 10.14203/widyariset.16.2.2013.269-276

Abstract

This paper discusses design and testing of adsorption refrigeration system with two adsorbers. Main components consisted of two adsorber with 6.6 kg solidified activated carbon inside, expansion valve, evaporator, condenser, and reservoir. All of that were connected with stainless steel pipes. The test performed for 75 minutes using 250 ml of methanol pro-analysis of 99.9% as a refrigerant in the system and the water temperature is 250C which is pumped through copper pipes to cool the adsorbents. The air pressure in the system during the test were in vacuum. The average pressure difference between the adsorber and the evaporator during testing was 4.6 cmHg. The lowest temperature was 140C obtained after the 65th minute.
DESIGN, MANUFACTURING AND TESTING KINETIC ADSORPTION TEST RIG Abrar Ridwan; Nasruddin -; Awaludin Martin; Arfie I. Firmansyah
Sistem Informasi Vol 2 No 1 (2011): Jurnal Photon
Publisher : LPPM Universitas Muhammadiyah Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jp.v2i1.119

Abstract

Adsorption on a solid adsorbent is the fundamental processes in the field of separation processes, purification of gases, adsorption cooling, advanced adsorption cooling, and extensive work on hydrogen storage. The understanding of the thermodynamic properties of adsorbent plus adsorbate system is important to analyze. Information concerning the relevant adsorption equilibrium and characterized of adsorbent is generally an essential requirement for the analysis and design of an adsorption separation process. For practical application, theadsorption equilibrium must be known over a broad range of operation temperatures. Also, the isotherms of pure species are fundamental information for dynamic simulation of adsorbers. The main objective of this research is to design kinetic adsorption test rig to investigate the capacity and rate of adsorption on adsorbent and adsorbate pair’s. The result of design kinetic adsorption test rig including dimensions of vapor vessel (pressure vessel) and measuring cell. The volume of vapour vessel is 1000 ml and measuring cell is 100 ml. Kinetic adsorption test rig was manufactured to investigate capacity and rate of adsorption up to 40 bar.
PENGEMBANGAN PENGERING BEKU PEMBEKUAN VAKUM DENGAN PEMANASAN KONDENSER Belyamin _; Rahmat Subarkah1; Nasruddin _
Jurnal Poli-Teknologi Vol. 10 No. 3 (2011)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (450.691 KB) | DOI: 10.32722/pt.v10i3.68

Abstract

Every year, West Kalimantan exports fresh aloevera abroad and at the same time the domestic industry imports aloevera powder produced by freeze drying process. If the freeze drying machine can be produced domestically, the aloevera product that became the mainstay of West Kalimantan can be processed in Indonesia. To achieve this long-term goal, a study that could result in freeze drying machine that can produce aloevera powder efficiently is needed. The process of designing, manufacturing and testing of vacuum freeze drying machine with condenser waste heat conducted at the Refrigeration Laboratory of Department of Mechanical Engineering UI. Vacuum freeze drying machine is designed and fabricated consisting of Chamber (there are containers placed material, the upper and lower heater) and Evaporator (cooling systems). This research has resulted a machine of freezing vacuum freeze dryers with heating condenser, working pressure -1 up to 3 millibars, the chamber temperature to minus or below 0 ºC, condenser temperature reaches 35 º C. In the drying process does not use a heating condenser then sublimation process completion time for 13 hours and obtained LOD values of ± 98.6%, while in the drying process that uses a heating condenser, it is time to 6.5 to 7 hours and obtained LOD values of ± 95 , 6%. Keywords : aloevera, freeze drying, vacuum freeze ABSTRAK Setiap tahun Kalimantan Barat mengekspor lidah buaya segar ke luar negeri dan pada saat yang sama industri dalam negeri mengimpor serbuk lidah buaya yang dihasilkan dengan proses pengeringan beku. Jika dapat dihasilkan mesin pengering beku di dalam negeri, maka lidah buaya yang menjadi produk andalan Kalimantan Barat dapat diproses di dalam negeri. Untuk mencapai tujuan jangka panjang ini maka diperlukan suatu penelitian yang dapat menghasilkan mesin pengering beku yang dapat memproduksi serbuk lidah buaya dengan efisien. Proses perancangan, pembuatan dan pengujian mesin pengeringan beku vakum dengan panas buang kondenser dilakukan di Lab Refrigerasi Departemen Teknik Mesin UI. Mesin pengeringan beku vakum yang dirancang dan dibuat terdiri dari Ruang Uji (terdapat wadah meletakkan material, pemanas atas dan bawah) dan Ruang Evaporator (Sistem refrigerasi). Penelitian ini menghasilkan alat pengering beku pembekuan vakum dengan pemanasan kondensor dengan tekanan kerja -1 hingga 3 milibar, suhu ruang chamber mencapai minus atau dibawah 0ºC, suhu kondensor mencapai 35ºC. Pada proses pengeringan yang tidak menggunakan pemanasan kondensor maka waktu terselesaikannya proses sublimasi selama 13 jam dan didapatkan nilai LOD sebesar ± 98,6 % sedangkan pada proses pengeringan yang menggunakan pemanasan condenser maka waktunya menjadi 6,5 hingga 7 jam dan didapatkan nilai LOD sebesar ± 95,6 %. Katakunci: aloevera, freeze drying, vacuum freeze
Characteristics of Vacuum Freeze Drying with Utilization of Internal Cooling and Condenser Waste Heat for Sublimation Alhamid, Muhammad Idrus; Yusuf, Nasruddin; Mahlia, Indra Teuku Meurah; Kosasih, Engkos Ahmad; Yulianto, Muhamad; Ricardi, Rio
Makara Journal of Technology Vol. 17, No. 2
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Vacuum freeze drying is an excellent drying method, but it is very energy-intensive because a relatively long drying time is required. This research investigates the utilization of condenser waste heat for sublimation as a way of accelerating the drying rate. In addition, it also investigates the effect of internal cooling combined with vacuum cooling in the pressure reduction process. Jelly fish tentacles were used as the specimen, with different configurations for condenser heat waste and internal cooling valve opening. The results show that heating with condenser heat waste can accelerate the drying rate up to 0.0035 kg/m2.s. In addition, pre-freezing by internal cooling prevents evaporation until the mass of the specimen is 0.47 g and promotes transition of the specimen into the solid phase.
Efficient Degradation of Methylene Blue Using La-PTC-HIna/Ti3C2Tx MXene: Adsorption and Photocatalytic Degradation Agustino Zulys; Adawiah Adawiah; Nasruddin Nasruddin
Indonesian Journal of Chemistry Vol 22, No 5 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.71692

Abstract

Isonicotinic acid is a pyridine carboxylic compound that can be used as a linker to construct coordination complexes. Adding isonicotinic acid (HIna) to the metal-organic framework (MOF) enhanced the MOF surface area, pore volume, and pore size and increased its catalytic activity. Ti3C2Tx MXene nanosheet with excellent metal conductivity was also employed on MOF to optimize its functionality. This work aims to synthesize MOF modulated isonicotinic acid La-PTC-HIna and design the new materials: La-PTC/Ti3C2Tx MXene and La-PTC-HIna/Ti3C2Tx MXene hybrid, then apply them for methylene blue photodegradation. La-PTC-HIna, La-PTC/Ti3C2Tx MXene, and La-PTC-HIna/Ti3C2Tx MXene were synthesized by the sonochemical method. MOF La-PTC-HIna has the highest methylene blue photocatalytic degradation activity than MOF La-PTC, Ti3C2Tx MXene, La-PTC/Ti3C2Tx MXene, and La-PTC-HIna/Ti3C2Tx MXene with degradation efficiency of 99.48% in 20 ppm methylene blue under visible irradiation for 210 min. This study reveals the La-PTC-HIna and La-PTC-HIna/Ti3C2Tx MXene as a new material that has the potential to remove methylene blue from an aqueous solution.
PEMODELAN DINAMIK PENDINGINAN BAHAN BAKAR NUKLIR BEKAS REAKTOR RISET SECARA NATURAL KONVEKSI PADA PROTOTIPE DRY CASK STORAGE Arifin Istavara; Ratiko Ratiko; Hendra Adhi Pratama; Nasruddin Nasruddin
Urania : Jurnal Ilmiah Daur Bahan Bakar Nuklir Vol 28, No 2 (2022): JUNI, 2022
Publisher : website

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/urania.2022.28.2.6639

Abstract

PEMODELAN DINAMIK PENDINGINAN BAHAN BAKAR NUKLIR BEKAS REAKTOR RISET SECARA NATURAL KONVEKSI PADA PROTOTIPE DRY CASK STORAGE. Penelitian ini secara khusus bertujuan untuk menguji kelayakan desain dry cask storage dan secara umum memberikan solusi penyimpanan Bahan Bakar Nuklir Bekas (BBNB) di Indonesia. Karena keterbatasan ruang penyimpanan pada penyimpanan tipe basah, maka penelitian ini bertujuan untuk merancang, melakukan eksperimen  dan mensimulasikan secara simultan. Pengujian desain canister memvariasikan tegangan heater 50 V sampai dengan 125 V dengan kondisi tertutup untuk mengetahui respon canister terhadap tegangan yang sebanding dengan panas peluruhan BBNB. Eksperimen dengan menggunakan ventilasi dry cask storage memvariasikan tegangan 100 V sampai dengan 175 V bertujuan untuk menguji dry cask storage terhadap pendinginan canister secara natural konveksi. Perhitungan secara teori dan simulasi menggunakan software juga dilakukan sebagai pembanding hasil dari eksperimen dari segi pendinginan secara natural konveksi dan hambatan termal. Hasil eksperimen menunjukkan respon desain canister berfungsi dengan baik yaitu semakin besar tegangan listrik yang diberikan, maka temperatur canister bertambah tinggi, yaitu 50 V sampai 125 V merespon 33,4°C sampai 56,6°C. Pengujian pendinginan canister secara natural konveksi menunjukkan hasil yang baik, yaitu antara lain dengan metode buka dan tutup ventilasi dry cask menunjukkan penurunan temperatur canister pada tegangan 100 Volt  sebesar  16,1°C dan 14,8°C pada 125 Volt. Hasil nilai komparasi antara eksperimen, perhitungan teori dan simulasi pada 175 V temperatur canister yaitu 44,9°C, 49,7°C dan 65°C secara berurutan, untuk air velocity yaitu 0,20 m/s, 0,25 m/s dan 0,39 m/s secara berurutan. Hasil perhitungan teori dan simulasi sedikit lebih tinggi dari eksperimen, ini mungkin disebabkan adanya kehilangan panas ke lingkungan saat eksperimen berlangsung. Hasil simulasi diperoleh kontur temperatur dan perilaku aliran natural konveksi didalam air gap menunjukkan desain dry cask storage berfungsi dengan baik.Kata kunci : Bahan bakar nuklir bekas, natural konveksi, canister, dry cask storage.
MANAJEMEN BISNIS RITEL DI KOTA MANADO PERSPEKTIF EKONOMI SYARIAH Masrur, Masrur; Yusuf, Nasruddin
JURNAL DARMA AGUNG Vol 30 No 1 (2022): APRIL
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Darma Agung (LPPM_UDA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46930/ojsuda.v30i1.3533

Abstract

A retail business is a series of product marketing that includes all activities that involve selling goods directly to end consumers as personal use items and is not a business. In order to be called a business that has Sharia standards, the entire business chain is sourced from provisions permitted by Sharia which include the capital cultivated, goods traded and services provided. This research examines the retail business management of Tokomu in Manado City which is owned by a devout Muslim entrepreneur so the research question is whether the retail business management that it runs will also be directly in accordance with Sharia economic provisions or standards. This research is descriptive-qualitative research in which the data were obtained from interviews, observations, and documentation. This research was conducted in the city of Mando with the main sample being Tokomu Manado. And from the research results it is known that Takomu, which was founded in 2017, is a type of independent retail business in which all forms of major decision-making are taken by the company owner, from procuring capital, selecting the type of goods, and estimating the value of the expected profit. The existing management structure, in the areas of purchasing, marketing and accounting, only provides input and consideration for company owners. In addition, the retail management of Tokomu's business has not yet fully implemented the Islamic retail business because the capital and goods sold are still mixed with capital and goods. who do not have sharia standards. Meanwhile, in terms of service and workforce management, it has complied with sharia provisions. Because the entire contract is transparent and clear, and nothing is usury, gharar, and maysir.
Pandangan Tokoh Masyarakat terhadap Pernikahan Wanita Hamil di Luar Nikah: Studi Kasus di Desa Buko, Kecamatan Pinogaluman Entuu, Rayen Riski P; Yusuf, Nasruddin
SPECTRUM: Journal of Gender and Children Studies Vol 3 No 1 (2023): June
Publisher : The Center for Gender and Children Studies, the Institute for Research and Communing Service, State Islamic Institute of Manado (IAIN) Manado, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30984/spectrum.v3i1.785

Abstract

Artikel ini membahas permasalahan kompleks seputar pandangan tokoh masyarakat terhadap pernikahan wanita hamil di luar nikah, dengan fokus pada studi kasus yang dilakukan di Desa Buko, Kecamatan Pinogaluman. Penelitian ini bertujuan untuk mengungkap faktor-faktor penyebab kehamilan di luar nikah serta mengeksplorasi perspektif tokoh masyarakat terhadap pernikahan yang terjadi setelah terjadinya kehamilan sebelum menikah. Dalam pendekatan kualitatif deskriptif dengan metode fenomenologis, hasil penelitian mengindikasikan bahwa pandangan tokoh masyarakat di Desa Buko sangat menekankan pentingnya memberikan pemahaman kepada pelaku zina tentang konsekuensi perbuatan tersebut serta mengenai konsep pernikahan yang sesuai dengan ajaran Islam. Meskipun dianggap sebagai perbuatan terlarang dan diharamkan, situasi di mana seorang perempuan sudah hamil menjelang pernikahan menimbulkan dilema moral. Pilihan menikahkan perempuan yang hamil dianggap sebagai alternatif yang lebih baik dibandingkan dengan tidak menikahkannya, karena dikhawatirkan akan berdampak pada tindakan bunuh diri atau dampak psikologis yang serius. Penelitian ini menyoroti bagaimana hukum dan pandangan sosial berperan dalam menjaga kemaslahatan umat manusia serta menekankan perlunya pemahaman yang mendalam terhadap nilai-nilai agama dalam konteks kehidupan sosial. Artikel ini menggambarkan kompleksitas dan kepekaan terhadap situasi individual yang harus dipertimbangkan dalam mengambil keputusan terkait pernikahan di luar nikah dalam masyarakat.
Co-Authors A. Haryono A. Lolo Sinrang A A. Mahendra Adawiah Adawiah Ade Kurniawan Agustino Zulys Ahmad Rajafi Ainun Mardiyah Lubis Alia Salsabila Farhani Andi Taufan Anggi Nugroho Utomo Annisa Putri Bachtiar Ardi Yuliono Ardianto Ardianto Arfie I. Firmansyah Aries Subiantoro Arifin Istavara Askar Adika Agama Aswin Aswin Athaya Khanza Kamilia Auzani, Ahmad Syihan Awaludin Martin Bagio Budiardjo Bambang Suryawan Basuni Hamzah Belyamin Belyamin Bilalu, Naskur Bisman Perangin – angin Botutihe, Magfirah Darwin Rio Budi Syaka Dieter Rahmadiawan Djabli, Irfan Edi Gunawan Engkos Achmad Kosasih Engkos Kosasih Engkos Kosasih Entuu, Rayen Riski P Erman Taer Evra Willya Evra, Willya Fadhilah Ikhsan Dinul Feri Yusivar Fernando, Henky Gatot Priyanto Gonibala, Pedro Muhammad Arfi Hamza Khamis Kombo Hamza Khamis Kombo Harinaldi . Hartawan . harun, nurlaila Hasan, Faradila Hendra Adhi Pratama Hendra Hermawan Ibrahim, Fathum Ilahude, Ridwan Imriyanti . Imtiaz Ali Laghari Indra Mahlia Indra Mahlia, Indra Jamal, Ridwan Kartoredjo, Ireniza Kosasih, Engkos Ahmad Larasati, Yuniar Galuh Lontoh, Fawzy Moro M. Idrus Alhamid Madsuha, Alfian Ferdiansyah Mahlia, Indra Teuku Meurah Makka, Misbahul Munir Mamonto, Feraningsih Marzon Maisi Mash'ud, Imam Masrur, Masrur Mokhtar Mokhtar Muh. Nurhalim A Muhamad Yulianto Muhammad Al-Hamid Muhammad Alhamid Muhammad Alhamid Muhammad Alhamid, Muhammad Muhammad Idrus Alhamid, Muhammad Idrus Muhammad Saleh Mursyid, Salma Nining Betawati Prihantini Nur Azizah Nur Khotimah Nurdin Hendri Nurlaila Isima Olii, Nurul Fauziah Pratiwi Mushar Rahmat Subarkah1 Ratiko Ratiko Ridho Irwansyah Ridwan, Hafidz Abrar Rio Ricardi Rio Ricardi, Rio Risman Affandy Rubiantin Mesha Nauli Tambunan Santoso Soekirno Sarib, Suprijati Subeitan, Syahrul Mubarak sudirman . Tadore, Nurulhimnin Tarig Elshaarani Tubagus, Munir Tumiwa, Anisa Jihan Usup, Djamila Willya , Evra Yasin, Yasin Yulianto Sulistyo Nugroho Yuliusman Yuliusman Yusuf, Aisyiyah Mumtazah N.