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All Journal INOTEKS : Jurnal Inovasi Ilmu Pengetahuan, Teknologi, dan Seni Jurnal Teknik Elektro Universitas Tanjungpura Jurnal Hortikultura Marine Research in Indonesia Jurnal Riset Akuntansi dan Manajemen Malahayati (JRAMM)
- Mulyadi
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Agriculture, Biological Sciences & Forestry Arts Humanities Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Electrical & Electronics Engineering

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Komposisi dan Konsentrasi Senyawa dalam Minyak Atsiri Jeruk Manis dan Jeruk Besar terhadap Perkembangan Tungau Panonychus citri McGregor Istianto, Mizu; Untung, K; Mulyadi, -; Trisyono, Y A; Yuwono, T
Jurnal Hortikultura Vol 16, No 1 (2006): Maret 2006
Publisher : Indonesian Center for Horticultural Research and Development

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Abstract

Tungau Panonychus citri (Acarina: Tetranychidae)  adalah salah satu hama penting yang menyerang tanaman jeruk di Indonesia. Salah satu kunci sukses untuk mengendalikan populasi P. citri adalah memahami interaksi hama ini dengan inangnya. Namun demikian, informasi dalam bidang ini masih sangat terbatas. Tujuan dari penelitian ini adalah untuk mengetahui perbedaan pengaruh minyak atsiri dari kulit buah jeruk manis dan jeruk besar terhadap perkembangan dan kemampuan reproduksi  tungau P. citri serta mengidentifikasi faktor penyebabnya.  Penelitian dilakukan di Laboratorium  Loka Penelitian Jeruk, Tlekung-Batu, Malang dan Universitas Gadjah Mada Yogyakarta mulai bulan Februari sampai Juli 2003. Perlakuannya adalah beberapa konsentrasi minyak atsiri, yaitu 10, 20, 40, 80 ppm, serta parafin dan kontrol.  Tiap perlakuan diulang 15 kali menggunakan  rancangan acak lengkap. Hasil penelitian menunjukkan bahwa minyak atsiri jeruk manis Pacitan dan jeruk besar Nambangan mampu menghambat perkembangan  dan menurunkan kemampuan reproduksi tungau P. citri pada kondisi laboratorium. Perkembangan yang terhambat  terlihat pada umur pradewasa yang menjadi lebih lama  dan umur dewasa lebih pendek dibanding perlakuan parafin dan kontrol.  Penurunan kemampuan reproduksi terlihat pada lebih sedikitnya telur yang diletakkan dan menetas dibanding perlakuan parafin dan kontrol.  Pengaruh negatif ini disebabkan oleh adanya senyawa limonen yang merupakan senyawa dominan dalam minyak atsiri jeruk.  Minyak atsiri jeruk besar Nambangan  mempunyai pengaruh negatif yang lebih kuat terhadap perkembangan dan kemampuan reproduksi P. citri dibanding minyak atsiri dari jeruk manis Pacitan.  Perbedaan pengaruh tersebut karena perbedaan kandungan senyawa linalool, di mana pada minyak atsiri jeruk besar kandungannya lebih sedikit dibanding pada minyak atsiri jeruk manis.  Linalool berperan mengurangi pengaruh negatif yang disebabkan oleh senyawa limonen. Hasil ini mengungkapkan ada peluang lain dalam mengendalikan tungau P. citri, yaitu memanfaatkan senyawa atsiri yang dihasilkan oleh tanaman itu sendiri dengan komposisi tertentu.  Panonychus citri is one of the most economically  important citrus pests in Indonesia. One of the key success for controlling the population of the pest is understanding the relationship between this mite and its host.  However, information in this area is not well understood. The objectives of this research were to evaluate the influences of essential oil  extracted from sweet orange and pummelo fruit peels on the development and reproductive capacity of P. citri and to understand the mechanism responsible for the different effects that will be useful to develop management program.  The research was conducted in the laboratory from February to July 2003 in Tlekung-Batu, Malang and Gadjah Mada University Yogyakarta. The treatments were 10, 20, 40, 80 ppm of essential oil, parafin and control. Each treatment was replicated 15 times and arranged  in a completely randomized design. The results showed that the essential oil  extracted from Pacitan sweet orange and Nambangan pummello fruit peels could inhibit the development and reduced  the reproductive capacity of P. citri. The essential oils prolonged the life cycle and reduced the fecundity of P. citri.  These negative effects were caused by limonene, a dominant compound in the citrus essential oil.  The negative effects of essential oil extracted from Nambangan pummelo were found to be more pronounced than that from Pacitan sweet orange. Concentration of linalool was found to be responsible for the differences, and it worked oppositely with limonene by reducing the negative effects of limonene on P. citri. Essential oil of Pacitan sweet orange contained more linalool than pummelo. This result gives an alternative technology to control P. citri by using volatile compounds produced by the plant itself with certain composition.
CALANOID COPEPODS OF THE GENUS CENTROPAGES AND ITS SPECIES-GROUP FROM INDONESIAN WATERS Mulyadi, -
Marine Research in Indonesia Vol 33, No 1 (2008)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/mri.v33i1.503

Abstract

The marine copepods of the genus Centropages form a very important component of tropical marine ecosys-tem, but are poorly known. In a continuing study of the copepods of Indonesian coastal waters, eight species of Centropages were collected from 11 sites during 1996-2006. Four out of five previously known species i.e., C. calaninus (Dana, 1849); C. furcatus (Dana, 1849); C. gracilis (Dana, 1849); C. orsini Giesbrecht, 1896, except C. elongatus Giesbrecht, 1869 have been recorded. Four species i.e., C. brevifurcus Shen and Lee, 1963; C. dorsispinatus Thompson and Scott, 1903; C. sinensis Chen and Zhang, 1965; and C. tenuiremis Thompson and Scott, 1903, are new records for the area.
CALANOID COPEPODS OF THE GENUS CENTROPAGES AND ITS SPECIES-GROUP FROM INDONESIAN WATERS Mulyadi, -
Marine Research in Indonesia Vol 33 No 1 (2008)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/mri.v33i1.503

Abstract

The marine copepods of the genus Centropages form a very important component of tropical marine ecosys-tem, but are poorly known. In a continuing study of the copepods of Indonesian coastal waters, eight species of Centropages were collected from 11 sites during 1996-2006. Four out of five previously known species i.e., C. calaninus (Dana, 1849); C. furcatus (Dana, 1849); C. gracilis (Dana, 1849); C. orsini Giesbrecht, 1896, except C. elongatus Giesbrecht, 1869 have been recorded. Four species i.e., C. brevifurcus Shen and Lee, 1963; C. dorsispinatus Thompson and Scott, 1903; C. sinensis Chen and Zhang, 1965; and C. tenuiremis Thompson and Scott, 1903, are new records for the area.
EVALUASI PENGAMAN GANGGUAN ARUS LEBIH PADA PENYULANG TANJUNG RAYA DUA DI PT. PLN (PERSERO) AREA PONTIANAK Mulyadi, -; Sirait, Bonar; -, Purwoharjono
Jurnal Teknik Elektro Universitas Tanjungpura Vol 2, No 1 (2019): Jurnal S1 Teknik Elektro UNTAN
Publisher : Faculty of Engineering, Universitas Tanjungpura

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Abstract

Gangguan hubung singkat di Penyulang tanjung raya dua merupakan permasalahan serius bagi GI Sungai Raya apabila tidak ditangani dengan benar. Untuk itu, gangguan hubung singkat yang terjadi pada penyulang, harus diatasi agar waktunya tidak melebihi batas kemampuan trafo tenaga, dan juga mengganggu belangsungnya aliran daya pada daerah yang tidak terganggu, yaitu dengan mengatur koordinasi pada peralatan proteksi. Didalam penelitian ini, peralatan proteksi yang digunakan yaitu rele arus lebih. Perhitungan arus gangguan hubung singkat pada penelitian ini adalah dengan menggunakan metode impedansi. Agar dapat mengevaluasi koordinasi rele arus lebih  yang berada di sepanjang Penyulang tanjung raya dua, dengan panjang penyulang masing-masing 4,125 Kms dan 16,5 Kms, maka perhitungan arus gangguan hubung singkat dibagi menjadi lima titik gangguan berdasarkan persentase panjang penyulang, yaitu 0%, 25%, 50%, 75%, dan 100%. Ada 3 jenis gangguan hubung singkat yang dihitung, yaitu gangguan hubung singkat tiga fasa, gangguan hubung singkat dua fasa, gangguan hubung singkat satu fasa. Dari ketiga jenis gangguan hubung singkat tersebut, gangguan hubung singkat tiga fasa lah yang paling besar yaitu 11855,24 A pada 0% panjang jaringan, kemudian gangguan hubung yang terkecil adalah gangguan hubung singkat satu fasa ke tanah yaitu 914,43 A pada 100% .Berdasarkan hasil perhitungan yang dilakukan pada penyulang Tanjung Raya Dua besarnya arus gangguan hubung singkat yang terjadi dipengaruhi oleh nilai impedansi dan jarak panjang penyulang, semakin jauh jarak gangguan maka semakin kecil pula arus gangguan hubung singkatnya, dan dapat dilihat pula semakin besar arus gangguan hubung singkat yang terjadi maka semakin cepat juga waktu rele proteksi bekerja. Besar arus gangguan hubung singkat tiga fasa lebih besar dari arus gangguan hubung singkat dua fasa dan satu fasa ketanah.Besarnya arus gangguan hubung singkat dipengaruhi jarak titik gangguan, semakin jauh titik lokasi gangguan maka semakin kecil arus gangguan hubung singkat, begitu pula sebaliknya.Semakin besar arus gangguan hubung singkat maka semakin cepat waktu kerja rele proteksi melakukan trip.waktu kerja rele dipenyulang lebih cepat dibanding waktu kerja rele di incoming rele, ini dikarenakan rele dipenyulang bekerja sebagai proteksi utama. Sedangkan rele di incoming bekerja sebagai proteksi cadangan
PENGEMBANGAN USAHA LAYANAN JASA SERVIS AMBON JAYA MOTOR DI DESA PATEGUHAN-PANDAAN-PASURUAN Mulyadi, -; Iswanto, -
INOTEKS: Jurnal Inovasi Ilmu Pengetahuan,Teknologi, dan Seni Vol 21, No 1 (2017)
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4254.359 KB) | DOI: 10.21831/ino.v21i1.13224

Abstract

Pateguhan village located in the district Pandaan, Pasuruan, ± 20 km from Campus II University of Muhammadiyah Sidoarjo. Pateguhan village is densely populated residential area which is close to the industrial regions. So the average of them are employees of the factory. As a means of transportation every day they mostly use motorcycles. Seeing the condition of the area as the partners established a workshop service of motorcycles and motorcycle parts sale. Obstacles faced Options are limited keyequipment, no hydraulic tools Overhaul Part Crankshaft and unavailability Back Lift Motor Cycle so that when the disassembly of spare parts of motorcycles require a long time and is not ergonomic, Marketing conducted from mouth to mouth and get a close friend so less known. The absence of financial accounting income and expenditure so it is unknown the profit and loss of the work done. Viewed from the condition required a solution that is made of hydraulic tools Overhaul Part Crankshaft Motorcycle And Back Lift Motor Cycle and implementation, held financial accounting training conducted on UMKM, then created a brochure and banner marketing and implementation. Repair of these solutions is expected to Ambon Jaya Motor added increased revenue
Penerapan Gaya Kepemimpinan Deleglasi Dan Trasformasi Terhadap Kinerja Kepala Desa (Desa Margorejo, Kecamatan Padang Ratu, Kabupaten Lampung Tengah) Mulyadi, -; Alansori, Apip; Fahrizal, Azli; Ansah, Andre
Jurnal Riset Akuntansi dan Manajemen Malahayati (JRAMM) Vol 14, No 2 (2025): Kinerja dan Bisnis
Publisher : Universitas Malahayati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33024/jur.jeram.v14i2.22015

Abstract

Leadership style is a very important tool in an organization, and researchers often study it. This research aims to find out how delegation and transformation leadership styles affect how well the village head does their job. The research data was gathered through questionnaires and observations, with 42 people answering, including community and environmental leaders. The data was analyzed using the SPSS 27 program. The test results showed that the delegation leadership style did not affect the village head's performance, but the transformation leadership style had a big impact
Pengaruh Upah Dan Lingkungan Kerja Terhadap Kinerja Karyawan Di PT Indokom Samudra Persada Novitania, Anggis; Ariningrum, Hardini; Alansori, Apip; Mulyadi, -
Jurnal Riset Akuntansi dan Manajemen Malahayati (JRAMM) Vol 14, No 4 (2025): Akuntansi Keuangan dan Manajemen
Publisher : Universitas Malahayati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33024/jur.jeram.v14i4.24962

Abstract

Employee performance is very important for the progress of a company. Wages and work environment are believed to be able to influence employee performance in achieving the set goals. The higher the wages and the good and pleasant work environment, the higher the employee's performance.This study aims to determine whether wages and work environment have a direct significant effect on employee performance. The population in this study were 30 employees at PT Indokom Samudra Persada. Data collected by questionnaire technique. The data analysis technique used is Multiple Linear Regression Analysis using the SPSS version 29 program.The results of this partial test indicate that wages have no significant effect, and work environment has a significant effect on employee performance. While the results of the simultaneous test show that wages and work environment have a significant effect on employee performance at PT Indokom Samudra Persada. 
Co-Authors - Iswanto, - -, Purwoharjono Alansori, Apip Ansah, Andre Fahrizal, Azli Hardini Ariningrum K Untung Mizu Istianto Novitania, Anggis Sirait, Bonar T Yuwono Y. Andi Trisyono