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Catalysis of glycerol acetylation on solid acid catalyst: a review Nur Hidayati; Rahmah Puspita Sari; Herry Purnama
Jurnal Kimia Sains dan Aplikasi Vol 23, No 12 (2020): Volume 23 Issue 12 Year 2020
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4532.588 KB) | DOI: 10.14710/jksa.23.12.414-423

Abstract

Biodiesel is a substitute fuel that is environmentally friendly, biodegradable, and sustainable. The need for biodiesel continues to increase. Biodiesel is made through the process of transesterification of triglycerides and alcohol. Glycerol is a side-effect of biodiesel products with a capacity of 10% of the total weight of its production. Glycerol is the simplest glyceride compound and has several functions as a primary ingredient in chemical production. Through acetylation, glycerol is converted to a material that has a higher sale value. Both homogeneous and heterogeneous catalysts are the acetylation approach to achieve the desired product, namely acetyl glycerol esters (mono-, di- and triacetin). However, in the process, the catalyst’s type and characteristics significantly affect the yield and conversion of the product and the deactivation or reusability of the catalyst, which can inhibit the catalyst’s utilization and effectiveness; therefore, it must be studied further. Besides, the parameters that affect the reaction will also be assessed.
Pengaruh Celebrity Endorser, Harga Produk, dan Electronic Word Of Mouth Terhadap Keputusan Pembelian Pada Produk Minuman Sprite Salsabila Alfi Ayu Shahara; Nur Hidayati; Eris Dianawati
E-JRM : Elektronik Jurnal Riset Manajemen E-JRM : Elektronik Jurnal Riset Manajemen Vol. 12 No. 01
Publisher : UNIVERSITAS ISLAM MALANG

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Abstract

Abstract This study aims to determine the influence of celebrity endorsers, product prices, and electronic word of mouth on purchasing decisions on sprite beverage products. The research used is a quantitative method. The population in this study were students of the Faculty of Economics and Business, Islamic University of Malang, class of 2019. Meanwhile, the sample used in this study was purposive sampling using the slovin formula, so there were 90 samples. The data used is primary data by using a questionnaire. The recording evaluation approach used is instrument test: validity and reliability test, normality test, conventional assumption test: multicollinearity test and heteroscedasticity test, multiple linear regression analysis, speculation test: simultaneous test, partial test and willingness coefficient.From the results of the research partially obtained results that celebrity endorser has no effect on purchasing decisions, product prices have no effect on purchasing decisions, and electronic word of mouth has a significant effect on purchasing decisions. While simultaneously celebrity endorser, product price, and electronic word of mouth have a significant effect on purchasing decisions. Keywords : Celebrity Endorser, Product Price, Electronic Word of Mouth, Purchase Decision
Pengaruh Modal Kerja, Volume Penjualan dan Biaya Operasional terhadap Laba Bersih pada Perusahaan Subsektor Semen yang Terdaftar di Bursa Efek Indonesia Periode 2015-2019 Nur Hidayati
Science of Management and Students Research Journal (SMS) Vol 3, No 2 (2021): Juni
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (760.006 KB) | DOI: 10.33087/sms.v3i2.113

Abstract

The purpose of this research is to determine the effect of working capital, sales volume and operating expense simultaneously and partially on net profit in the cement subsector companies listed on the Indonesia Stock Exchange for the period 2015-2019. This research method is descriptive and quantitative method. This study uses secondary data. The analysis method used in this study was multiple linear regression with panel data using SPSS 22. tests conducted are normality tests, multicollinearity tests, autocorrelation tests, heteroscedasticity tests, F test hypotheses, t test hypotheses and determine what coefficients of determination (R2).In this study, based on the sampling criteria, there are 4 companies that are sampled, namely PT. Indocement Tunggal Prakasa Tbk, PT. Semen Baturaja (Persero) Tbk, PT. Semen Indonesia (Persero) Tbk and PT. Wijaya Karya Beton Tbk. In accordance with the results of the study, spss 22 results obtained multiple linear regression equations namely Y = -2,830 + 0,470 +1,079 – 0,285 + e. So based on hypothesis testing, simultaneously (test F) working capital, sales volume and operating expense significantly affect net profit because the value of Fcount is greater than Ftable (29,641 > 3,24). Partially (test t) working capital significantly affects net profit because the tcount value is greater than ttable (2,323 > 2,120), sales volume has a significant effect on net profit because the tcount value is greater than ttable (4,599 > 2,120) and operating expenses had no significant impact on net profit as the tcount value was smaller than ttable (1,376 < 2,120).  From the results of this study, it can be concluded that working capital, sales volume and operating expense simultaneously have a significant impact on net income. Partially indicates that working capital has a significant effect on net income, sales volume has a significant effect on net income and operating expense have no significant effect on net income.
Pengembangan Modul Pembelajaran tentang Perubahan Lingkungan Berbasis Konstruktivisme untuk Meningkatkan Keterampilan Berpikir Kritis dan Kreatif Nur Hidayati
Jurnal Ilmiah Citra Ilmu : Kajian Kebudayaan dan Keislaman Vol 16 No 31 (2020): Jurnal Ilmiah Citra Ilmu: Kajian Kebudayaan dan Keislaman
Publisher : Institut Islam Nahdlatul Ulama Temanggung

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Abstract

The research is aimed to produce module development regarding environment change based on constructivism to improve critical and creative thinking skills, knowing the suitability and the effectiveness of the module which developed, also an interesting module in the learning process. The research is a research and development using the development procedure of ADDIE. The analysis is done to analyze module development needs; The design is product design of modules; The development is module development that is next measured its eligibility by material and media expert. The implementation is module applications as teaching material, and evaluation is the result of the evaluation showing that module regarding environment change based on constructivism to improve critical and creative thinking skills are proper to be used. The total of the subject of the research is 25 students as a trial class and 24 students as a control class. The data analysis is qualitative descriptive and quantitative. The instrument used in the research is a questionnaire to measure module eligibility, and question in the pretest and post-test are used to gain the data of students. The result of the research indicates; (1)the module development regarding environment change based on constructivism to improve critical and creative thinking skills is needed by the teacher in the learning.(2) the module which developed is proper to be tried in the learning process. (3) The module which developed is proven effective and interesting to be used in the learning and shows the difference between the result of learning with and without module (the result of independents sample test p=0,140<0,05).
Pengaruh Prestasi Coaching, Konseling, dan Mentoring Terhadap Kinerja Guru Penggerak Angkatan II di Kabupaten Kebumen Nur Hidayati
Media Manajemen Pendidikan Vol 6 No 1 (2023): Juni 2023
Publisher : Universitas Sarjanawiyata Tamansiswa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30738/mmp.v6i1.14106

Abstract

This study aims to examine and analyze (1) the effect of coaching, counseling, and mentoring, together on teacher performance, (2) the effect of coaching on teacher performance, (3) the effect of counseling on the performance of  teacher, ( 4) the effect of mentoring on teacher performance. This type of research uses a quantitative approach method. The population of this study were Kindergarten, Primary School, Junior High School, and Senior High School teachers who took part in the 2nd batch of Teacher Mobilization Education in Kebumen Regency, totaling 147 people.     Data collection techniques using a questionnaire. Data collection techniques for major hypotheses using multiple linear regression analysis and minor hypotheses with partial correlation. The results of this study indicate that: (1) There is a positive and significant effect of coaching, counseling, and mentoring together on teacher performance, (2) There is a positive and significant influence of coaching on the performance of the teacher, (3) There is a positive and significant influence of counseling on the performance of the teacher, (4) There is a positive and significant influence of mentoring on teacher performance. Of the three independent variables that have a dominant influence on the performance of the teacher performance is coaching.  
Glycerol Acetylation: Effect of Graphene Oxide Catalyst Mass Percentage on Glycerol Conversion and Acetin Selectivity Nur Hidayati; Eggy Juan Prasetyo; Wahyu Annisa Mega Brilianti; Herry Purnama; Malik Musthofa; Anisa Ur Rahmah
CHEMICA: Jurnal Teknik Kimia Vol 10, No 2 (2023): August 2023
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26555/chemica.v10i2.25909

Abstract

Glycerol, a byproduct of the transesterification reaction has a wide range of applications. Acetylation is a promising method for converting surplus glycerol into mono-, di-, and tri-acetin, which is used in the cosmetic, pharmaceutical, polymer, and fuel additive sectors. The kind of catalyst and reaction conditions influence glycerol conversion and acetylation selectivity. Acetylation of glycerol was performed in this study by reacting acetic acid and glycerol with a graphene oxide catalyst produced using the Hummers method. The amount of graphene oxide catalyst (3%, 5%, and 7%) in the reaction mixture was adjusted to see how it affected glycerol conversion and reaction product selectivity. Other variables such as the glycerol:acetic acid mole ratio of 1:9, reaction temperature of 120oC, stirring speed of 1000 rpm, and reaction time of 120 minutes were held constant. Glycerol conversion improves with increasing catalyst mass in the reaction mixture, with the highest conversion (92.1%) achieved when employing a 7% catalyst mass, with its selectivity to monoacetin, diacetin, and triacetin being 70.2%, 4.2%, and 25.6%, respectively.
Synthesis of Solid Acid Catalyst from Fly Ash for Eugenol Esterification Nur Hidayati; Titik Pujiati; Elfrida B. Prihandini; Herry Purnama
Bulletin of Chemical Reaction Engineering & Catalysis 2019: BCREC Volume 14 Issue 3 Year 2019 (December 2019)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.14.3.4254.683-688

Abstract

A series of fly ash-based heterogeneous acid catalysts were prepared by chemical and thermal treatment. Fly ash was chemically activated using sulfuric acid and followed by thermal activation. Characterization methods of XRD, BET, SEM-EDX, and the performance in esterification of eugenyl acetate production was carried out to reveal the physical and chemical characteristics of prepared catalysts. Activated catalyst showed high silica content (96.5%) and high BET surface area of 70 m2.g-1. The catalyst was proven to be highly active solid acid catalyst for liquid phase esterification of eugenol with acetic acid yielding eugenyl acetate. A yield of 43-48% was obtained with activated fly ash catalysts for 90 minutes reaction. These catalysts may replace beneficially the conventional homogenous liquid acid to the eco-friendly heterogeneous one. 
Electro-oxidation of Ethanol on Carbon Supported PtSn and PtSnNi Catalysts Nur Hidayati; Keith Scott
Bulletin of Chemical Reaction Engineering & Catalysis 2016: BCREC Volume 11 Issue 1 Year 2016 (April 2016)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.11.1.399.10-20

Abstract

Even though platinum is known as an active electro-catalyst for ethanol oxidation at low temperatures (< 100 oC), choosing the electrode material for ethanol electro-oxidation is a crucial issue. It is due to its property which easily poisoned by a strong adsorbed species such as CO. PtSn-based electro-catalysts have been identified as better catalysts for ethanol electro-oxidation. The third material is supposed to improved binary catalysts performance. This work presents a study of the ethanol electro-oxidation on carbon supported Pt-Sn and Pt-Sn-Ni catalysts. These catalysts were prepared by alcohol reduction. Nano-particles with diameters between 2.5-5.0 nm were obtained. The peak of (220) crystalline face centred cubic (fcc) Pt phase for PtSn and PtSnNi alloys was repositioned due to the presence of Sn and/or Ni in the alloy. Furthermore, the modification of Pt with Sn and SnNi improved ethanol and CO electro-oxidation. 
Effect of Co and Mo Loading by Impregnation and Ion Exchange Methods on Morphological Properties of Zeolite Y Catalyst Didi Dwi Anggoro; Nur Hidayati; Luqman Buchori; Yayuk Mundriyastutik
Bulletin of Chemical Reaction Engineering & Catalysis 2016: BCREC Volume 11 Issue 1 Year 2016 (April 2016)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.11.1.418.75-83

Abstract

Coal tar can be used as an alternative raw material for the production of liquid fuels, such as: gasoline and diesel through hydrogenation and cracking process. Hydrogenation and cracking process requires a catalyst which has metal components for hydrogenation reaction and acid components for cracking reaction. In this study, the Co/Zeolite Y and Co-Mo/Zeolite Y catalysts were prepared by impregnation and ion exchange methods. Characterizations of the catalysts were carried out by X-Ray Diffraction (XRD) and gravimetric acidity. The catalysts were tested for coal tar conversion to liquid fuel under various temperatures, amount of catalyst and hydrogen flow rates in a fixed bed flow reaction system. Liquid fuels products were analyzed by gas chromatography (GC). The XRD Spectra indicated that the addition of Co and Mo metals did not affect catalysts structure, however it alters the percentage of crystallinity. The addition of Co metal using impregnation method caused reduction in crystallinity, while the addition of Mo caused improvement of crystallinity. The Co-Mo/Zeolite Y catalyst with highest crystallinity was obtained by loading using ion exchange method. The addition of Co and Mo metals caused increasing acidity. However, the increasing composition of Co and Mo loaded on Zeolite Y catalyst decreased the yield of liquid fuels from coal tar. It can be concluded that the yields of liquid fuels and the composition of gasoline fractions from hydrocracking of coal tar were highly dependent on  acidity of the catalyst. 
PROGRAM KEMANDIRIAN MASYARAKAT (PKM) DI CV BINTANG JAYA SUKOHARJO Sunardi Sunardi; Argoto Mahayana; Gregorius Prima Indra Budianto; Sumardiyono Sumardiyono; Ifandari Ifandari; Waluyo Budi Atmoko; Nur Hidayati; Soebiyanto Soebiyanto
BUDIMAS : JURNAL PENGABDIAN MASYARAKAT Vol 6, No 1 (2024): BUDIMAS : Jurnal Pengabdian Masyarakat
Publisher : LPPM ITB AAS Indonesia Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29040/budimas.v5i2.10698

Abstract

Mitra dalam kegiatan Program Kemandiran Masyarakat adalah CV Bintang Jaya yang terletak di Jl. Nori 10B Ngepakan, Joho, Sukoharjo. Mitra adalah produsen instan kunyit dengan merek dagang SI PINTAR. Mitra memiliki satu keistimewaan yakni instan kunyit dengan 4 macam rasa. Produk memiliki manfaat, namun instan kunyit hasil produksi mitra belum cukup dikenal masyarakat. Proses produksi dilakukan dalam skala rumahan dimana mitra belum sepenuhnya menerapkan standar produksi berdasarkan kriteria Cara Produksi Pangan yang Baik – Industri Rumah Tangga Pangan (CPPB-IRTP). Masalah yang dihadapi mitra yaitu: 1) Alat produksi tidak higienis; dan 2) Belum mempunyai ijin PIRT. Solusi yang akan dilakukan dari kegiatan ini adalah: 1) intoduksi alat parut dan peras; 2) pengurusan perijinan P-IRT. Metode yang akan dilakukan untuk merealisasikan tujuan dari program pelaksanaan PKM yaitu melalui: 1) Pengadaan mesin parut dan peras yang terbuat dari stainless; 2) Pendampingan pengurusan perijinan P-IRT. Hasil yang diperoleh setelah kegiatan pengabdian terkait aspek produksi ialah adanya peningkatan pengetahuan pemilik dan karyawan tentang CPPB-IRTP dan perbaikan tempat produksi yang lebih bersih dan layak. Terkait aspek produksi, terdapat peningkatan jumlah produksi dan perolehan ijin P-IRT dari Dinas Kesehatan.
Co-Authors a agus Priyono Abd. Hakam Abdul Halik Abraham Nurcahyo ABS, M Khoirul Achmad Agus Priyono Adibatul Khumaira’Mirza Lutfallah Afdalul Aulad Afi Rahmat Slamet Agam Rizkiyan Ahmad Dani Dzakiyuddin Ahmad Fajri Aleria Irma Hatneny Alisa Mutia Sara Allysa Rochmadina Tjahyaningrum Andi Normala Anik Malikah Anisa Cahyani Aprilia Anisa Dwi Wandani Anisa Ur Rahmah Anniez Rachmawati APRILIANA APRILIANA Ardani Fadilah Ahmad Argoto Mahayana Arif Agung Saputro Arini Fitria Mustapita Avisya Lailatul Fadhilah Ayu Kharisma Putri Ayu Mayshella Putri Ayu Mir’atus Sholihah Bahri, Matahari Adihapsari Saiful Basalamah, Muhammad Ridwan Bayu Antiko Bella Saputri Beny Mahyudi Saputra Buchory Ms Budi Setio Zadi Cahyani Nurlaela Chusnul Chotimah Cindra Suryaputri Anggraeni Dania Ulva Deddy Rahman Saputra Denis Apriliyanto Denny Geovandi Putra Desti Ikromah Dewi Sulistyawati Diah Ayu Dian Eka Permata Sari Dian Kresnadipayana Diana Ambarwati Didi Dwi Anggoro Dwi Indarti Putri Dwiyani Sudaryanti Dyah Putri Anggraini Eggy Juan Prasetyo Eka Farida Elfrida B. Prihandini Elisa Putri Nastiti Ella Agustin ENI SETYOWATI Enita yuliasari Eris Dianawati Esti Widya Astuti Etty Saraswati Evi Rahayu Fadli Kemal Wusurwut Fahruddin Angga Pradana Fahrurrozi Rahman Faniati Dian Bakar Faqih Adam Faradina Rochmawati Ningrum Fariska Ayu Zulfiana fauzan Fauzan Fita Rusdian Ikawati Gigih As’ary Gregorius Prima Indra Budianto Halimatus Sya’diyah Hanifah Qoriroh Syalzabilah Hardianti Hardianti Hasna Nur Isnaini Heni Anggraini Hernik Farisia Herry Purnama Hunainah Hunainah Ichwan Haryadi Ifa Kurnia Sari Ifandari Ifandari Iis Nabila Ika Erniawati Ika Rahma Maulida Imroatus Sholikah IMRO’ATUS SHOLIHAH Indra Viki Hartoko Indradewa, Rhian Inggit Dwi Priliya Intan Dewi Sa’adah Ismy Dahlia Safitri Isnadiah Endang Mastuti Ita Athia J.M.V. Mulyadi Jaelani Chafidz Nur Shihab Jhanua Rizal Idfiano Joni Iskandar Junaidi Junaidi Junaidi Junaidi Karina Widyaswari Iin Kusumawati Keith Scott Khalikussabir, Khalikussabir Khoirulliati K Khozinatul Abror Kiky Candrawati Krisna Tiknanda Arman Kusmiyati Kusmiyati Laela Purnamasari Laila Maulatul Haq Lathifah Lathifah Latifatul Rochmah Lilis Murtuti Liria Rhosa Effendi Luqman Buchori Lutfi Zainul Hasan M. Cholid Mawardi Magvira Nurul Khoyima Malik Musthofa Mardiyono Mardiyono Maria Fransiska Utami Bugis Mawaddah Mawaddah Moch. Lucky Fahmi Moh. Amin Mohammad Amin Mohammad Rizal Muhamad Rizal Fatoni Muhammad Abdulah Zamzamy Muhammad Mujiburahman Muhammad Mujiburohman Muhammad Mujiburohman Muhammad Syahrul Wafa Muhammad Zulfikar Mu’izzatul Maghfiroh Najmudin A. Mumtaz Narimo Narimo Naufal Rifqi Syafruddin Neny Winarti Nida Nabila Nisrina Hasna Wardani Novanda Asalia Novi Panca Wardani Nukman Nador Nur Choliqfatus Azizah Nur Eka Yanti Nur Islamiyah Nur Septa Aminudin Nurhidayah Nurhidayah Nurul Patmawati Pardiman Pardiman Pramita Cindy Imannurya Prima Octaria Pramesti Putri Ekawati Putri Rahayu Putri Yudiastantri Qisthi Hanifa Maisarah Ragas Fitria Sina Murti Rahmah Puspita Sari Rahmatdatulah Rahmatdatulah Rahmawati Rahmawati Rania Nur Rachma Ratna Furi Ratna Tri Hardaningtyas, Ratna Tri Redi Hardianto Resa Widiamawarta Restu Millaningtyas Restu Zulaekha Riska Dwi Fitriana Riska Widia Rantasari Risma Khoyrunnisa Risna Nur Anggraini Riwahtini Riwahtini Riza Adi Kurniawan Rizal David Rizca Aulyana Rohmat Rohmat Rosyid Ash Shidiq Ruqayyah Ruqayyah Salma Silvia Nazihah Salsabila Alfi Ayu Shahara Salsabila, Unik Hanifah Salsalbila Junita Sari Santi Fitri Harianti Saraswati, Ety Sargio Sargio Sarina Hi Djafar Shofyah Shofyah Siti Asiyah Siti Fatimah Siti Mabruroh Siti masruroh Soebiyanto Soebiyanto Sri Sukenti Subur Widiyanto Subyati Furi Handayani Sulton Afkhar Nawafil Sumardiyono Sumardiyono Sunardi Sunardi Sunaryo, Hadi Supriyanto Supriyanto Suwardi, Suwardi Syuria Darma Putra TB Lukmanul Hakim Tiara Niken Pramesti Tica Aditya Avita Titik Pujiati TRI WULANDARI Tsamrotul Masrifatil Abadiah Twenty Vivi Kartika Ulfa Dwi Yanti H. Abubakar Ulfa Uswatul Hasanah Ulis Sa’adah Ulmansyah Yassir Umu Azizah Venni Dwi Silfiani Vira Violita Vivi Wijaya Lestari Wahib Khoiruddin Wahyu Annisa Mega Brilianti Wahyu Devi Satna Pambudi Wahyu Prawesthi Waluyo Budi Atmoko Yasa Yasmita Yayang Giana Putri Yayuk Astuti Yayuk Mundriyastutik Yohanes Indra Riskajaya Yongki Dwi Ardiansyah Yuanita Syaiful Yulia Dwi Tirtaasari Yunita Dwi Puspita Yunita Raj Alfan Putri Zahratul Trixie Harinda Zakiah Zakiah Zulfika Nur’aini