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Work Function Modulation with Self-assembled Monolayers: Effect of Dipole Moment on Packing Density Nurfitria, Nia; Tao, Yu-Tai; Huang, Ding-Chi
IPTEK Journal of Proceedings Series No 1 (2015): 1st International Seminar on Science and Technology (ISST) 2015
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23546026.y2015i1.1168

Abstract

A series of benzylmercaptans carrying different para-substituents were used to form self-assembled monolayers on gold in order to modulate the work funtion of the metal electrode. Ellipsometry, Reflection Absorption Infrared Spectroscopy (RAIRS), and cyclic voltametry were used to chracterized the structure of the monolayer. The results show that as the dipole moment increases in the molecule, the surface coverage decreases. This can be the reason that a more polar molecule does not necessarily generate work function change proportionally.
Potensi Mikoriza Vesikular Arbuskular (MVA) sebagai Biofertilizer pada Tanaman Jagung (Zea mays) Febriyantiningrum, Kuntum; Oktafitria, Dwi; Nurfitria, Nia; Jadid, Nurul; Hidayati, Dewi
Biota : Jurnal Ilmiah Ilmu-Ilmu Hayati Vol 6, No 1 (2021): February 2021
Publisher : Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24002/biota.v6i1.4131

Abstract

Mining activities can cause environmental damage, and needs land rehabilitation efforts. One approach to land rehabilitation after mine is with repairing the ecosystem condition by improving the quality of the soil, with increase fertility and enriching soil nutrient content by providing a biofertilizer from microbe, such as mycorrhizal fungi.  This study aims to determine the potential use of vesicular arbuscular mycorrhizal fungus (MVA) as a biofertilizer by examining the effect of MVA on the growth of corn plant (Zea Mays). Applicated indigenus MVA was able to increase the absorption of phosphorus (P) nutrients in the soil by corn plant so it had an effect on increasing the height and diameter of the corn plant stalks. MVA has the potential as a basic material for making biofertilizer, so it can be used to improve soil quality and environment in ex-limestone mining areas.  
Pengembangan Desain Pembelajaran Basic Mathematic dengan Metode Estafet Kartu Kresna Oktafianto; Eriska Fitri Kurniawati; Lilik Muzdalifah; Ahmad Zaenal Arifin; Nia Nurfitria; Afifah Afifah; Ridho Awanda
Abdimas Universal Vol. 1 No. 2 (2019): Oktober
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Balikpapan (LPPM UNIBA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (586.357 KB) | DOI: 10.36277/abdimasuniversal.v1i2.36

Abstract

Basic education is very important for the next generation of the nation. A growing era requires educators to implement creative and innovative learning strategies. Basic education that is centered on elementary students is the center of attention, often mathematics lessons become a heavy scourge for elementary students. Therefore, learning mathematics in elementary students also requires learning strategies that are different from before. The purpose of the Rumah Matematika (RuMat) program for the community especially elementary students is to change the mindset of mathematics lessons that often scourge students into fun lessons by applying the Card Relay Method. The method is more in the form of a game so students can absorb knowledge while playing. With Rumah Matematika (RuMat) program, students will be more interested in learning basic mathematics in a more fun way.
Optimalisasi Pemanfaatan Tanaman Penjernih Udara di Lingkungan SMA/SMK/Sederajat Kecamatan Rengel dan Plumpang Kabupaten Tuban Jawa Timur Kuntum Febriyantiningrum; Dwi Oktafitria; Nia Nurfitria
Abdimas Universal Vol. 1 No. 2 (2019): Oktober
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Balikpapan (LPPM UNIBA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (706.464 KB) | DOI: 10.36277/abdimasuniversal.v1i2.40

Abstract

‘The purpose of this community service program is to help and enhance environmental conservation efforts that are more effective, efficient, and targeted for schools in the karst region in creating a healthy environment free of air pollution. The problem faced by partners is the lack of school participation in the karst area to deal with the increasing dust volume in the dry season which can disrupt teaching and learning activities. Low school participation is due to a lack of student and teacher knowledge about air-purifying plants that can be planted in the school environment. The solution offered to school partners as a first step is to hold a workshop to introduce karst areas and plant species that are useful as air purifiers. The implementation of the workshops that have been carried out can increase the understanding of students and teachers about the condition of the school environment, types of air purification plants, and the use of used materials for growing media. The monitoring results show that the partner schools namely SMAN 1 Plumpang and SMAN 1 Rengel have implemented the results of the workshop, namely by planting various air purification plants by utilizing used materials as planting media so as to achieve a beautiful environment and environmental conservation in the karst school area running well.
STUDI ADSORPSI ZAT WARNA NAPHTHOL YELLOW S PADA LIMBAH CAIR MENGGUNAKAN KARBON AKTIF DARI AMPAS TEBU W. P. Utomo; E. Santoso; G. Yuhaneka; A. I. Triantini; M. R. Fatqi; M. F. Huda; N. Nurfitria
Jurnal Kimia (Journal of Chemistry) Vol.13 No.1 Januari 2019
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (722.56 KB) | DOI: 10.24843/JCHEM.2019.v13.i01.p16

Abstract

The aim of this research is to get activated carbon from sugarcane bagasse with high adsorption capacity to Naphthol Yellow S and to know factors influencing the adsorption capacity. Activated carbon is prepared by incomplete combustion of sugracane bagasse. The resulting carbon is activated with H2SO4 with concentration variation of 0.5; 1.0; 1.5 and 2.0 M and is continued by calcination at 400 °C. The measurement of the surface area of ??activated carbon by the methylene blue method indicates that the activation process successfully extends the surface area of carbon from 31.87 m2/g before activation to 66-72 m2/g after activation. Activated carbon with concentration of 2.0 M H2SO4 showed the highest surface area of ??71.85 m2/g, however, the best adsorption was shown by activated carbon with a concentration of 0.5 M H2SO4 with the adsorption capacity of 83.93%. The adsorption test showed that the best amount of adsorbent was 0.2 g with contact time for 30 minutes. Prolonged contact time can decrease the amount of Naphthol Yellow S adsorbed. The best adsorption test result was shown by sample with activator concentration of 0,5 M, mass of 0,2 g and contact time of 30 min with adsorption capacity 95,81% or amount of dye adsorbed equal to 143,72 mg/g. The adsorption study also showed that the entire Naphthol Yellow S adsorption process followed the Langmuir isothemal adsorption model. Qualitative testing of real batik waste indicates that activated carbon can reduce the dyes waste containing Naphthol Yellow Sexhibited by the color of batik waste which is more faded.
Potensi Mikoriza Vesikular Arbuskular (MVA) sebagai Biofertilizer pada Tanaman Jagung (Zea mays) Kuntum Febriyantiningrum; Dwi Oktafitria; Nia Nurfitria; Nurul Jadid; Dewi Hidayati
Biota : Jurnal Ilmiah Ilmu-Ilmu Hayati Vol 6, No 1 (2021): February 2021
Publisher : Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24002/biota.v6i1.4131

Abstract

Mining activities can cause environmental damage, and needs land rehabilitation efforts. One approach to land rehabilitation after mine is with repairing the ecosystem condition by improving the quality of the soil, with increase fertility and enriching soil nutrient content by providing a biofertilizer from microbe, such as mycorrhizal fungi.  This study aims to determine the potential use of vesicular arbuscular mycorrhizal fungus (MVA) as a biofertilizer by examining the effect of MVA on the growth of corn plant (Zea Mays). Applicated indigenus MVA was able to increase the absorption of phosphorus (P) nutrients in the soil by corn plant so it had an effect on increasing the height and diameter of the corn plant stalks. MVA has the potential as a basic material for making biofertilizer, so it can be used to improve soil quality and environment in ex-limestone mining areas.  
Penurunan Kadar Surfaktan Anionik dan Fosfat dalam Air Limbah Laundry di Kawasan Keputih, Surabaya menggunakan Karbon Aktif Wahyu Prasetyo Utomo; Zjahra Vianita Nugraheni; Afifah Rosyidah; Ova Maratus Shafwah; Luthfi Khoirun Naashihah; Nia Nurfitria; Ika Fitri Ullfindrayani
Akta Kimia Indonesia Vol 3, No 1 (2018)
Publisher : LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (516.112 KB) | DOI: 10.12962/j25493736.v3i1.3528

Abstract

Limbah laundry merupakan salah satu limbah yang dapat mencemari lingkungan dan berdampak buruk bagi manusia. Penelitian ini bertujuan untuk menurunkan kadar surfaktan anionik (deterjen) dan fosfat yang terdapat dalam air limbah laundry di kawasan Keputih, Surabaya dengan menggunakan karbon aktif. Penurunan kadar surfaktan anionik dan fosfat menggunakan karbon waktif dengan variasi ukuran partikel yakni -60, -120 dan -200 mesh. Proses adsorpsi dilakukan dengan metode batch. Hasil yang diperoleh menunjukkan bahwa kadar surfaktan anionik pada limbah sebelum adsorpsi sebesar 10,65 ppm dan kadar fosfat sebesar 14,148 ppm. Kedua nilai tersebut berada diluar ambang batas yang ditetapkan pemerintah sebesar 100 ppm. Uji adsorpsi menunjukkan bahwa karbon aktif mampu menurunkan kadar surfaktan anionik dan fosfat secara signifikan. Kadar surfaktan anionik terendah setalah adsorpsi mencapai 3.102 ppm yang dihasilkan dari karbon aktif berukuran -200 mesh. Adsorpsi surfaktan anionik mengikuti model adsorpsi isotermal Freundlich. Sementara itu, kadar fosfat tidak terdeteksi setelah proses adsorpsi. Secara umum, semakin kecil ukuran karbon aktif, semakin besar kapasitas adsorpsinya terhadap surfaktan anionik dan fosfat.
Pengaruh Konsentrasi Aktivator Kalium Hidroksida (KOH) pada Karbon Aktif dan Waktu Kontak Terhadap Daya Adsorpsi Logam Pb dalam Sampel Air Kawasan Mangrove Wonorejo, Surabaya Nia Nurfitria; Kuntum Febriyantiningrum; Wahyu Prasetyo Utomo; Zjahra Vianita Nugraheni; Devita Dwining Pangastuti; Hanifatul Maulida; Fitri Nur Ariyanti
Akta Kimia Indonesia Vol 4, No 1 (2019)
Publisher : LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (673.46 KB) | DOI: 10.12962/j25493736.v4i1.5071

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh aktivator KOH dan waktu kontak karbon aktif dari tempurung kelapa terhadap adsorpsi logam Pb di sampel air kawasan mangrove Wonorejo Surabaya. Kandungan awal ion logam Pb2+ pada sampel air berjumlah 1,1890 ppm. Karbon aktif dibuat dari tempurung kelapa. Aktivasi dilakukan menggunakan KOH dengan variasi konsentrasi 1 M, 3M, dan 5 M. Waktu kontak adsorpsi ion logam Pb2+ pada sampel air menggunakan karbon aktif divariasikan selama 1 jam, 1,5 jam, 2 jam dan 2,5 jam untuk setiap variasi konsentrasi aktivator KOH. Hasil adsorpsi terbanyak didapatkan dari karbon aktif yang diaktivasi KOH 1M dengan waktu kontak selama 1,5 jam. Jumlah ion logam Pb2+ yang teradsorp yaitu sebesar  1,5645 mg/L atau 86% dari konsentrasi awal.
Rekayasa Pakan Kaya Nutrisi Bagi Peternak Kambing di Desa Bandungrejo Kec. Plumpang dan Desa Gesikharjo Kec. Palang, Kab. Tuban- Jawa Timur Nia Nurfitria; Kuntum Febriyantiningrum; Dwi Oktafitria
JURNAL PENGABDIAN KEPADA MASYARAKAT Vol 8, No 1 (2018): Juni 2018
Publisher : LPPM UNINUS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (107.651 KB) | DOI: 10.30999/jpkm.v8i1.165

Abstract

Tujuan program pengabdian masyarakat ini adalah untuk memberikan solusi atas permasalahan yang dialami oleh kedua mitra yang merupakan kelompok peternak sistem penggemukan kambing, yaitu Mitra 1 kelompok “Ngembes Rejeki”, Desa Bandung Rejo, Kecamatan Plumpang dan Mitra 2 kelompok “Mekarsari”, Desa Gesikharjo, Kecamatan Palang, Kabupaten Tuban, Provinsi Jawa Timur. Permasalahan yang dihadapi oleh mitra adalah manajemen pakan. Solusi yang iberikan bagi peternak kambing adalah dengan memberikan workshop terkait pembuatan dan penggunakan rekayasa pakan kaya nutrisi yang mampu menekan biaya pengeluaran untuk pakan konsentrat serta dapat menjadikan nutrisi pakan lebih efektif dan efisien sesuai TDN kambing, selain itu juga mampu mereduksi bau tidak sedap dari limbah ternak kambing (urin dan feses). Hasil yang didapatkan setelah tahap pelaksanaan workshop adalah mitra memberikan pakan tambahan kepada kambing berupa pakan kaya nutrisi yang berasal dari limbah industri dan pertanian. Setelah dilakukan evaluasi program, biaya pakan yang dikeluarkan mitra berkurang, dengan pertambahan berat badan kambing mitra yaitu rata rata 3,12 kg/bulan dan  feses dan urin yang tidak berbau. 
Quality Analysis Of Liquid Organic Fertilizer Using Raw Vegetable Waste From Pasar Baru Kabupaten Tuban: Analisa Kualitas Pupuk Organik Cair Berbahan Baku Limbah Sayuran Pasar Baru Kabupaten Tuban Nia Nurfitria; Kuntum Febriyantiningrum; Annisa Rahmawati
Agrifarm : Jurnal Ilmu Pertanian Vol 9 No 1 (2020): July
Publisher : Universitas Widya Gama Mahakam

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (329.037 KB) | DOI: 10.24903/ajip.v9i1.922

Abstract

This study aims to determine the manufacturing process and the quality of liquid organic fertilizer made from vegetable waste from Pasar Baru, Tuban Regency. Liquid organic fertilizer is done as a solution to the amount of vegetable waste which is the most waste produced by Pasar Baru in Tuban Regency with the amount reaching 2 tons / day. This large amount of vegetable waste will cause environmental problems if not handled and treated properly. The method used in making liquid organic fertilizer is semi anaerobic fermentation using drum composter with the addition of EM-4 bioactivator. The quality of liquid organic fertilizer will be seen based on the physical properties and the results of the analysis of macro nutrient content and adjusted to SNI determined by Permentan No. 70 Th. 2011. The results of the analysis showed that physical properties pH and temperature are fullfill the standard of SNI Permentan No.70 Th. 2011. But for the content of macro elements of C-organic, N, P, and K total are not fullfill the standard.