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All Journal Jurnal Teknologi Prosiding Semnastek JURNAL KONVERSI Journal of Applied Sciences and Advanced Technology Jurnal Manajemen Transportasi & Logistik (JMTRANSLOG) Aceh International Journal of Science and Technology Scientica: Jurnal Ilmiah Sains dan Teknologi
Ismiyati Ismiyati
Universitas Muhammadiyah Jakarta
Religion Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Social Sciences Other

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PENGARUH JENIS ADSORBEN TERHADAP EFEKTIFITAS PENURUNAN KADAR TIMBAL LIMBAH CAIR RECYCLE AKI BEKAS Rohmat Mufti Ali; Tri Yuni Hendrawati; Ismiyati Ismiyati; Nurul Hidayati Fithriyah
Jurnal Teknologi Vol 12, No 1 (2020): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.12.1.87-92

Abstract

Pengolahan air limbah Aki bekas dilakukan karena menghasilkan timbal (Pb) sebagai polutan beracun terutama jika memasuki perairan sebagai air baku air minum. Tujuan penelitian ini adalah mendapatkan pengaruh jenis adsorben (zeolit dan karbon aktif) dan konsentrasinya (0%, 5%, 10%, 15%, 20%, dan 25%) terhadap penurunan kandungan Pb dalam air limbah dari proses daur ulang aki mobil bekas. Pembuatan sampel imitasi air limbah dilakukan dengan perendaman komponen aki mobil bekas, seperti pelat dan larutan asam, dalam 4 liter air selama 10 hari yang menghasilkan kadar awal Pb sebesar 8,02 mg/L dan pH sebesar 2. Adsorben diaktivasi dengan perlakuan kimia dan fisika, kemudian ditambahkan ke dalam sampel limbah sebanyak 100ml, lalu diaduk dengan kecepatan 150 rpm selama 1 jam. Volume NaOH 0,5 M yang dibutuhkan untuk menetralkan 10 ml sampel limbah yaitu 35,7 ml. Kadar Pb terendah dalam sampel limbah adalah 0,239mg/L yang diperoleh pada adsorpsi menggunakan adsorben karbon aktif 25%.
Pemilihan Prioritas Pemanfaatan Daun Binahong(Bassela Rubra Linn) Dengan Metode AHP(Analytical Hierarkhi Process) Ade Nurul Hidayat; Ninin Asminah; Tri Yuni Hendrawati; Ismiyati Ismiyati
Prosiding Semnastek PROSIDING SEMNASTEK 2019
Publisher : Universitas Muhammadiyah Jakarta

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Abstract

Indonesia merupakan Negara agraris yang memiliki banyak sekali potensi tanaman yang dapat digunakan sebagai obat-obatan, Binahong ( Anredera Cordifolia ) merupakan salah satu tanaman yang terdapat di Indonesia yang berfungsi sebagai obat untuk proses penyembuhan menurut survey social ekonomi nasional. Flavonoid yang terkandung dalam daun binahong dapat berfungsi sebagai obat herbal alami dengan bermacam-macam efek anti inflamasi, analgetik, anti radang dan antioksidan. Tujuan penelitian ini adalah untuk menentukan prioritas pemanfaatan daun binahong yang efektif menggunakan software CDP(Criterium Decision Plus) dan metoda AHP (Analytical Hierarchy Process) dengan mempertimbangkan kriteria kandungan zat aktif, ketersediaan bahan baku, harga, adanya efek samping dan kemudahan dalam membudidayakan daun binahong tersebut. Data – data diperoleh dari data primer dan sekunder yaitu berupa data atau catatan dari jurnal terdahulu, wawancara ahli dan kuisioner yang didapat peneliti, sehingga didapatkan hasil analisis AHP bahwa hasil pemilihan prioritas pemanfaatan daun binahong adalah sebagai (Obat Luka Bakar) dengan nilai tertinggi 0,930 diikuti dengan 0,740 sebagai anti oksidan & antiseptik dan 0,620 sebagai obat jerawat.
Pemilihan Bagian Tanaman Jeruk Purut (CITRUS HYSTRIX D.C) Potensial Sebagai Minyak Essensial Aromaterapi Hasil Proses Maserasi Dengan Metode Analytical Hierarkhi Process (AHP) Rusnia Junita Hakim; Yully Mulyani; Tri Yuni Hendrawati; Ismiyati Ismiyati
Prosiding Semnastek PROSIDING SEMNASTEK 2019
Publisher : Universitas Muhammadiyah Jakarta

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Abstract

Aromaterapi merupakan istilah generik bagi salah satu jenis pengobatan alternatif yang menggunakan bahan cairan tanaman yang mudah menguap, banyak dikenal dalam bentuk minyak essensial yang berguna untuk mengatur fungsi kognitif dan kesehatan. Citrus hystrix salah satu tanaman yang dapat dimanfaatkan sebagai bahan baku untuk pembuatan minyak essensial. Tujuan penelitian ini adalah melakukan pemilihan bagian tanaman citrus hystrix (daun, kulit, ranting) sebagai sumber minyak essensial aroma terapi hasil proses ekstraksi macerasi dan menggunakan software analytical hierarkhi process dengan mempertimbangkan kriteria berupa ketersediaan bahan baku, hasil rendemen, harga jual minyak, pemasaran (packing), aroma serta warna minyak essensial. Daun, kulit dan ranting jeruk di jemur kering, dirajang direndam dalam pelarut di dalam toples kaca tertutup, kemudian didiamkan selama beberapa hari sambil dilakukan pengadukan agar kelarutan minyak atsiri merata, menyaring dan mengepres larutan hingga diperoleh cairan pelarut. Penjernihan dilakukan dengan cara pengendapan atau penyaringan. Citronellal dalam citrus hystrix merupakan bahan baku utama penghasil minyak atsiri. Hasil analisis AHP menunjukkan bahwa dari hasil pemilihan prioritas bagian daun merupakan bagian prioritas sebagai bahan untuk pembuatan minyak essensial dengan bobot 0,88 diikuti dengan kulit dengan bobot 0,77 dan ranting dengan bobot 0,575.
The Influence of Operation Conditions of Gedi Leaf Drying Process (Abelmoschus Manihot. L) On Antioxidant Activity Siska Ayu Anggraini; Tri Yuni Hendrawati; Ismiyati Ismiyati
Journal of Applied Sciences and Advanced Technology Vol 3, No 2 (2020): Journal of Applied Sciences and Advanced Technology
Publisher : Faculty of Engineering Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jasat.3.2.57-64

Abstract

Gedi leaf (Abelmoschus manihot L) is a type of plant that is categorized in a group of medicinal plants / herbal plants and grows mostly in North Sulawesi and is a tropical plant of the Malvacea family, gedi leaves contain flavonoids, tannins, alkaloids, anthraquinone saponins and anthocyanins which have antioxidant activity. Antioxidants are important compounds in maintaining a healthy body. Because it functions as a free radical scavenger. In this study, examined the use of gedi leaf drying as an alternative source of antioxidants to be applied for face masks. Gedi leaf powder sample was tested by Proximate testing to determine the characteristics of gedi leaf powder and gedi leaf powder used as a powder mask preparation. The method used to obtain dry gedi leaves is the oven with a temperature variation used 40; 50; 60 ° C and 5 time variations; 6; 7 hours. The results showed that the best yield of drying gedi leaf powder against time to temperature was 5 hours with a temperature of 70⸰C, from the best yield it was processed into masks divided into 3 formulas, namely 10; 20; 30% dried gedi leaves in a 40gr formula with rice flour as an added ingredient. From the results of making 3 dry gedi leaf mask formulas tested proximate with the help of 20 panelists, the results of the panelists' assessment of formula 2 with 20% gedi leaves are preferred and get a value of 20% higher. Measurement of the 3 formulas obtained pH values of gedi leaf masks of 5.63, 5.68, and 5.72.
IMPLEMENTASI KEBIJAKAN SISTEM TRANSPORTASI DARAT DAN DAMPAKNYA TERHADAP KESEJAHTERAAN SOSIAL DI JAKARTA Muh Kadarisman; Aang Gunawan; Ismiyati Ismiyati
Jurnal Manajemen Transportasi & Logistik (JMTRANSLOG) Vol 2, No 1 (2015): MARET
Publisher : Institut Transportasi dan Logistik Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54324/j.mtl.v2i1.129

Abstract

Transportation is the backbone in creating social welfare in Jakarta. Therefore, if there are problems in the transportation system, it will have an impact on the smooth traffic flow and will ultimately hamper the achievement of public welfare. This study used a descriptive-qualitative method. This study refers to the theory proposed by Anderson (in Tachjan, 2006: 23) and Sarana, et al (2009: 9). The results of the study are as follows. Policy implementation transportation system in Jakarta has been able to improve the social welfare of most citizens, which means some people have to feel and enjoy the outcome of transportation development  in Jakarta. However, others have not optimally felt the positive impact of the policy. Even, it is perceived negatively; such as traffic jams which are almost evenly distributed throughout Jakarta causing high air pollution, hampered economic activity and generated high economic costs that social welfare was also weakened. This is reinforced by the increasing poverty rate in 2014 that reached 393,980 people thousand compared to previous years.
MANAJEMEN PEMELIHARAAN BUS TRANSJAKARTA DALAM MENCAPAI STANDAR PELAYANAN MINIMUM Ismiyati Ismiyati; Miskul Firdaus; Dian Artanti Arubusman
Jurnal Manajemen Transportasi & Logistik (JMTRANSLOG) Vol 3, No 2 (2016): JULI
Publisher : Institut Transportasi dan Logistik Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54324/j.mtl.v3i2.92

Abstract

This study aims to analyze the operational management system to improve the Transjakarta bis maintenance needs of safety and comfort for the user community. The method used is qualitative descriptive method. Results of the study: 1. Implementation of busway that has been and are going to be implemented by the local government of DKI Jakarta through the Department of Transportation (Dinas Perhubungan) and the Agency of Busway management (BP) has met the expectation like infrastructure such as ticketing system, bis stops, bis facilities, human resources and publications, 2. Performance in implementating busway program, in general has shown its satisfaction level. Busway is considered as an alternative public transport that is safe, comfortable and punctual, 3. Evaluation of the implementation of the busway program since last year have shown satisfying results. Busway passengers are around 17.4 million. 7.6 percent has shifted from private transportation to busway. It is higher than the average of shift rate in the world that is only 4 to 5 percent. The income from this program in 2015 for DKI Jakarta is Rp. 42.7 billion and it also has successfully changed people's attitude to use public transportaion. However, congestion problem is not significantly decreased.
PENGARUH WAKTU PELEBURAN PADA PEMBUATAN ASAM OKSALAT DENGAN METODE HIDROLISA LIMBAH KARDUS Gita Desinta; Ummul Habibah Hasyim; Irfan Purnawan; Ismiyati Ismiyati; Syamsudin AB
JURNAL KONVERSI Vol 9, No 1 (2020)
Publisher : Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/konversi.9.1.6

Abstract

Limbah kertas menjadi masalah tersendiri bagi lingkungan. Limbah kertas bisa dimanfaatkan secara optimal dengan cara diolah menjadi bahan yang lebih berguna dan bernilai karena mengandung selulosa. Tujuan penelitian ini adalah mengetahui waktu optimum peleburan untuk mendapatkan asam oksalat dalam limbah kardus. Metode yang digunakan dengan menambahkan natrium hidroksida (NaOH) untuk menghidrolisis selulosa. Asam oksalat dipurifikasi dengan menambahkan kalsium klorida dan asam sulfat. Hasil yang didapatkan berupa  waktu optimum peleburan selama 75 menit dan konsentrasi NaOH sebesar 4N, dengan yield sebesar 3.07%. Pengolahan data menggunakan persamaan regresi linier didapatkan hasil sebanyak 81,3 % keragaman hasil %yeild asam oksalat dipengaruhi oleh waktu peleburan limbah kardus. Di dapat Hasil FTIR asam oksalat dan standard asam oksalat menunjukan kemiripan yang dapat dilihat dari peregangan gugus –OH, dimana  dilihat pada bilangan gelombang 3600 cm-1, peregangan asam karboksilat terdapat pada bilangan gelombang 1850 cm-1, peregangan ikatan C-C terdapat pada bilangan gelombang 1450 cm-1, dan peregangan ikatan C-O terdapat pada bilangan gelombang 1300 cm-1 .  Kata kunci : asam oksalat,  hidrolisis, kardus, 
IDENTIFKASI KENAIKAN TITIK DIDIH PADA PROSES EVAPORASI, TERHADAP KONSENTRASI LARUTAN SARI JAHE Ismiyati Ismiyati; Fatmasari Lubis
JURNAL KONVERSI Vol 9, No 2 (2020)
Publisher : Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/konversi.9.2.7

Abstract

Evaporasi adalah suatu operasi dimana sebagian fluida berubah dari fasa cairan menjadi fasa uap. Teknologi evaporasi vakum banyak digunakan pada industri pangan terutama pada pengolahan bahan pangan pasta atau cairan kental seperti pembuatan saos tomat, kecap, pengolahan susu, juga ekstrak sari jahe. Penguapan pada evaporator dapat dihitung dengan mengetahui tekanan absolut yang terjadi di ruang penguapan. Dimana suhu penguapan merupakan suhu uap jenuh pada tekanan absolut di dalam ruang penguapan tersebut. Larutan yang dipekatkan akan menunjukkan kenaikan titik didihnya, sesuai dengan konsentrasi larutan yang diinginkan. Tujuan peneltian adalah mengidentifikasi perilaku kenaikan titik didih larutan sari jahe pada berbagai tekanan dan suhu operasi, sehingga dapat dibuat formula (rumus) persamaan konsentrasi larutan berkorelasi dengan kenaikan titik didih tekanan. Metode yang digunakan pada penentuan formula kenaikan titik didih adalah menggunakan rancangan Response Surface Method.  Rancangan percobaan yang dilakukan dengan memvariasikan tekanan dan suhu didih.  Perlakuan yang diberikan terdiri dari 5 taraf uji yaitu dengan dilakukan 5 kelompok rentan tekanan. Hasil penelitian menunjukkan terdapat hubungan yang signifikan antara tekanan evaporasi, kenaikan titik didih larutan terhadap konsentrasi larutan sari Jahe. Dengan kondisi optimum terjadi pada tekanan optimum  21,720 mmbar dan kenaikan titik didih optimum  13,8816 oC, diperoleh konsentrasi  optimum  49,7267 %.Keyword: evaporasi, konsentrasi, kenaikan titk didih, sari jahe.
Simulation of Efficiency in Improving the Performance of Cylindrical Vertical Furnace Using Indirect Method Dimas Adhitya Rahman; Ismiyati Ismiyati; Tri Yuni Hendrawati
Journal of Applied Sciences and Advanced Technology Vol 5, No 1 (2022): Journal of Applied Sciences and Advanced Technology
Publisher : Faculty of Engineering Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jasat.5.1.7-12

Abstract

One of the essential pieces of equipment at the Pertamina Refinery Unit V Balikpapan is the Furnace F-3-04 Vertical Cylindrical type. Furnace operation efficiently becomes very important given the vast energy consumption and directly influences the level of refinery profits. Therefore, it is necessary to do a simulation to increase the efficiency value to minimize energy use. This study aimed to determine the effect of O2 Excess and Flue Gas temperature on efficiency and to find the best efficiency from the simulation results on a Vertical Cylindrical Furnace. In this study, the furnace's efficiency is calculated and simulated using the indirect method. The heat entering the furnace is reduced by the heat lost compared to the heat entering. Initial data processing is a normality test to determine whether the data is usually distributed and can be used for data to be entered into the mathematical simulation of furnace efficiency. The efficiency value produced by Furnace F-3-04 is 86.3%, with an O2 excess value of 7.25% and a Flue Gas temperature of 419 0C. From the simulation carried out, it can be seen that the operating parameter that most affects efficiency is O2 Excess of 0.15 – 0.18% for every 0.5% decrease in O2 Excess for 5 simulations. Meanwhile, the Flue Gas temperature gets a value of 0.02 – 0.03% for every 2 0C decrease for 5 simulations. The best efficiency value is 87.7%, with O2 Excess of 4.75% and Flue Gas temperature of 409 0C.
PROSES PENGERINGAN DAN EKSTRAKSI ULTRASONIK DAUN KERSEN (MUNTINGIA CALABURA L.) SEBAGAI ANTIOKSIDAN POTENSIAL Ayu Candraningsih; Ismiyati Ismiyati; Nurul Hidayati Fithriyah; Tri Yuni Hendrawati
Jurnal Teknologi Vol 14, No 2 (2022): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.14.2.247-254

Abstract

Kersen (Muntingia calabura L.) is a tropical plant from the Muntingiaceae family which is a wild plant that is often found in Indonesia. This plant is one of the herbal plants that are used as natural antioxidants. The purpose of this study was to obtain a drying model of cherry leaf extract and determine the activity of flavonoids as antioxidants in cherry leaf extract. The method used to obtain cherry leaf extract using ultrasonic sonication with a wavelength of 40 kHz. Variations made in the test are the length of drying time (30 minutes, 45 minutes, 60 minutes, 90 minutes, 120 minutes) and to find the most suitable drying model between Newton and Page. Concentration of cherry leaf extract using a rotary vacuum evaporator. Identification of cherry leaf extract, namely: determining the absorbance value for flavonoids and IC50 (Inhibitor Concentration) using UV-Vis Spectrophotometry and then determining the antioxidant content. The results of the study obtained that the highest wet extract yield was treated with a drying time of 30 minutes, which was 34.1%. The highest total flavonoid content was found in the 30 minute drying time treatment, which was 51,067 g/ml. The test of antioxidant levels obtained by IC50 is 0.89 ppm which is a strong antioxidant. The most suitable drying model is the Newton drying model with the equation MR=exp-(0.0029t) with a value of R2 = 0.9867 with k = 0.0029.
Co-Authors Aang Gunawan Ade Nurul Hidayat Anwar Ilmar Ramadhan Ayu Candraningsih Bayu Wiyantoko David Ryan Kurniawan Dian Artanti Arubusman Dimas Adhitya Rahman Dyah Prani Nurfadhilah Elina Olivia Fachri Azmi Fatma Sari Fitri Nuryani Gita Desinta Irfan Purnawan Purnawan Miskul Firdaus Muh Kadarisman Ninin Asminah Nurul Hidayati Fithriyah Ratri Ariatmi Nugrahani Robby Julian Kurniawan Rohmat Mufti Ali Rusnia Junita Hakim Siska Ayu Anggraini Syamsudin AB Tri Yuni Hendrawati Ummul Habibah Hasyim Wike Maylani Yully Mulyani Yustinah Yustinah Zaki Mohammad Luthfillah