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All Journal VALENSI Journal of Tropical Life Science : International Journal of Theoretical, Experimental, and Applied Life Sciences Jurnal Kedokteran Syiah Kuala Jurnal Ilmu Kimia Universitas Brawijaya The Journal of Pure and Applied Chemistry Research JURNAL ILMU PEMERINTAHAN Indonesian Journal of Chemistry Jurnal Menara Ekonomi : Penelitian dan Kajian Ilmiah Bidang Ekonomi Bulletin of Chemical Reaction Engineering & Catalysis
Masruri Masruri
Universitas Brawijaya
Agriculture, Biological Sciences & Forestry Arts Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Economics, Econometrics & Finance Environmental Science Health Professions Materials Science & Nanotechnology Medicine & Pharmacology Social Sciences

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Synthesis and Characterization of Cellulose Acetate and Nanocellulose Acetate from Sengon Agroindustrial Waste (Paraserianthes falcataria) Nur Ikhtiarini; Masruri MASRURI; Siti Mariyah Ulfa; Widodo Widodo
The Journal of Pure and Applied Chemistry Research Vol 11, No 3 (2022): Edition September-December 2022
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2022.011.03.644

Abstract

Synthesis and characterization of cellulose acetate and nanocellulose acetate have been carried out. Cellulose was isolated from sengon wood powder waste using 6% NaOH solution and bleached with NaOCl. The cellulose was hydrolyzed with 60% formic acid to obtain nanocellulose. Cellulose and nanocellulose were then modified with acetic anhydride. The synthesized products were characterized by FTIR to identify organic functional groups, powder XRD to measure crystallinity, and SEM to observe surface morphology. Solubility tests in several types of solvents were also performed. The degree of substitution (DS) of cellulose acetate and nanocellulose acetate was carried out based on Indonesia’s SNI 0444:2009 method. The DS calculation show that the cellulose acetate and nanocellulose have DS of 2.9 and 2.1, respectively.
Degradable Bioplastic Developed from Pine-Wood Nanocellulose as a Filler Combined with Orange Peel Extract Alyaa Farrah Dibha; Masruri Masruri; Arie Srihardyastutie
Indonesian Journal of Chemistry Vol 23, No 1 (2023)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.75520

Abstract

This research presents the degradable bioplastics developed from pinewood nanocellulose as a filler in PVA matrices. The steps involve the isolation and characterization of cellulose and nanocellulose. Meanwhile, the manufacturing of degradable bioplastic involves the combination of PVA, nanocellulose, and with or without orange peel extract. The effect of bioplastics without the addition of citric acid and orange peel extract is also reported as a comparison. It is found that orange peel extract improves the tensile strength (1708.54 kPa), elastic modulus (42.71 kPa), elongation (40%), and degradability (78.44% in 2 weeks) compared to bioplastic without the orange peel extract. These results indicate that orange peel extract acts as a reinforcing agent in PVA-nanocellulose bioplastic.
Study Direction to Oxidize a Local Pine Rosin with Potassium Permanganate Widia Edy Kuncoro; Moh. Farid Rahman; Masruri MASRURI, Ph.D; Siti Mariyah Ulfa
The Journal of Pure and Applied Chemistry Research Vol 12, No 1 (2023): Edition January-April 2023
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2023.012.01.3298

Abstract

Pine rosin acid or Gondorukem is a solid resin obtained from pine sap. It is yielded as residue from a high temperature distillation process. In industry, rosin acid is widely used and modified as raw material in paint, ink, adhesive, resin, thermoplastic, and thermosetting polymer. Modification process generally is undergone to generate rosin acid with specific properties and for certain purposes. This paper report, potassium permanganate oxidation reaction of pine rosin acid under acidic process at low temperature. Product identified as 13,14-seco-13-oxoabiet-7-ene-dioic acid (0.52%), 7,8-dihydroxy-abietic acid (6.62%), and 7-oxo-dehydroabietic acid (1.49%). The crude product was isolated as a pale to white solid. Under high temperature a yellowish product was resulted. In overall, the yield isolated in between 46.4% and 86.0%.
Antibacterial Activity of Legundi Leaf (Vitex trifolia) Essential Oil Using In-Vitro and In-Silico Methods Retno Indriatie; Masruri Masruri; Warsito Warsito
The Journal of Pure and Applied Chemistry Research Vol 12, No 1 (2023): Edition January-April 2023
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpacr.2023.012.01.738

Abstract

Staphylococcus aureus causes many severe diseases, such as meningitis, lung infection, and hematogenous osteomyelitis. The prolonged use of antibiotic drugs leads to antimicrobial resistance (AMR), decreasing their effectiveness against S. aureus. Therefore, novel drugs isolated from natural products have been the focus of many researchers to solve that problem. The essential oils isolated from Vitex trifolia leaf have many pharmacological activities, including antibacterial and antifungal activities. In this research, essential oil was isolated by distillation, followed by GC-MS analysis. The antibacterial activity of the essential oil was conducted using a disk diffusion test (Kirby-Bauer) and by molecular docking study. The essential oil yield from distillation was 0.13%, containing major compounds such as sabinene, eucalyptol, terpinen-4-ol, α-terpineol, limonene, and caryophyllene. The essential oil gave intermediate inhibition against S. aureus with a 6.91 ± 0.03 mm inhibition zone in 20 mg/mL of the sample. Using molecular docking study, caryophyllene and α-terpineol were the key compounds for inhibiting the active site of tyrosyl-tRNA synthetase, sortase A, and dihydrofolate reductase that are responsible for the S. aureus growth and development.
ANALISIS KINERJA KARYAWAN CAMAT DITINJAU DARI PERSPEKTIF KOMPETENSI, PELATIHAN BUDAYA ORGANISASI Prima Yulianti; Masruri Masruri; Shoja Ismela
Jurnal Menara Ekonomi : Penelitian dan Kajian Ilmiah Bidang Ekonomi Vol 9, No 1 (2023): VOLUME IX NO. 1 OKTOBER 2023
Publisher : Jurnal Menara Ekonomi : Pelatihan dan Kajian Ilmiah Bidang Ekonomi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31869/me.v9i1.4803

Abstract

Sumber daya manusia perlu dikelola secara profesional agar tercipta keselarasan antara kepentingan karyawan dan kepentingan organisasi dalam upaya memajukan organisasi. Untuk mengembangkan sumber daya manusia, organisasi mengadopsi teknik yang berbeda, mengatur berbagai program pendidikan teknis dan memperkenalkan karyawan baru pada budaya, nilai, keyakinan, filosofi dan proses organisasi sehingga karyawan memiliki arah yang jelas untuk mewujudkan tujuan individu dan organisasi. Oleh karena itu, untuk pengembangan yang berkelanjutan, organisasi harus berupaya menyelaraskan tujuan, sasaran organisasi dan kinerja karyawan serta membangun budaya yang baik dengan mengembangkan kompetensi kerja yang positif dan pelatihan yang tepat. Perusahaan akan berkembang dan mampu bertahan dalam lingkungan persaingan yang kompetitif apabila didukung oleh kinerja karyawan yang berkompeten di bidangnya. Penelitian ini bertujuan untuk mengetahui dan menganalisis pengaruh kompetensi, pelatihan dan budaya organisasi terhadap kinerja karyawan camat Kecamatan Padang Utara Kota Padang. Selain itu, juga untuk memperoleh gambaran dan analisis verifikatif tentang keadaan karyawan berdarkan data empirik. Hal ini dilakukan untuk memperoleh temuan-temuan yang bisa dijadikan masukan bagi karyawan dalam rangka mewujudkan tindakan positif menuju peningkatan kinerja yang lebih produktif, memiliki kompetensi dan keterampilan serta berpengaruh dalam pembentukan jati diri seorang karyawan agar mampu menumbuhkan rasa pertanggung jawaban karyawan terhadap perusahaan. Kualitas sumber daya manusia yang tinggi akan sangat menunjang dalam pencapaian tujuan organisasi, sebab manusialah yang merupakan pengelola, pengatur dan penggerak aktivitas sumber daya lain dalam organisasi. Metode yang digunakan adalah metode kuantitatif, dengan menggunakan kuesioner karyawan camat Kecamatan Padang Utara Kota Padang, Data yang didapat kemudian disusun dalam tabel – tabel yang menunjukan frekuensi dan presentase nilai dari masing – masing jawaban responden, kemudian diolah dan dianalisis dengan menggunakan model teknik analisis regresi sederhana, dan diolah dengan bantuan program Statistical Product and Service Solution (SPPS). Objek penelitian ini adalah seluruh karyawan camat Kecamatan Padang Utara Kota Padang berjumlah 60 karyawan. Teknik pengambilan sampel dengan teknik total sampling, yakni dengan metode sensus. Hasil yang didapat adalah kompetensi, pelatihan dan budaya organisasi terhadap kinerja karyawan baik secara parsial maupun secara simultan berpengaruh positif dan signifikan terhadap kinerja karyawan.  Kata kunci : Kompetensi, Pelatihan, Budaya Organisasi, Kinerja Karyawan
The Production of Green Diesel Rich Pentadecane (C15) from Catalytic Hydrodeoxygenation of Waste Cooking Oil using Ni/Al2O3-ZrO2 and Ni/SiO2-ZrO2 Momodou Salieu Sowe; Arda Rista Lestari; Eka Novitasari; Masruri Masruri; Siti Mariyah Ulfa
Bulletin of Chemical Reaction Engineering & Catalysis 2022: BCREC Volume 17 Issue 1 Year 2022 (March 2022)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.17.1.12700.135-145

Abstract

Hydrodeoxygenation (HDO) is applied in fuel processing technology to convert bio-oils to green diesel with metal-based catalysts. The major challenges to this process are feedstock, catalyst preparation, and the production of oxygen-free diesel fuel. In this study, we aimed to synthesize Ni catalysts supported on silica-zirconia and alumina-zirconia binary oxides and evaluated their catalytic activity for waste cooking oil (WCO) hydrodeoxygenation to green diesel. Ni/Al2O3-ZrO2 and Ni/SiO2-ZrO2 were synthesized by wet-impregnation and hydrodeoxygenation of WCO was done using a modified batch reactor. The catalysts were characterized using X-ray diffraction (XRD), X-ray fluorescence (XRF), and scanning electron microscopy - energy dispersive X-ray spectroscopy (SEM-EDS), and N2 isotherm adsorption-desorption analysis. Gas chromatography - mass spectrometry (GC-MS) analysis showed the formation of hydrocarbon framework n-C15 generated from the use of Ni/Al2O3-ZrO2 with the selectivity of 68.97% after a 2 h reaction. Prolonged reaction into 4 h, decreased the selectivity to 58.69%. Ni/SiO2-ZrO2 catalyst at 2 h showed selectivity of 55.39% to n-C15. Conversely, it was observed that the reaction for 4 h increased selectivity to 65.13%. Overall, Ni/Al2O3-ZrO2 and Ni/SiO2-ZrO2 catalysts produced oxygen-free green diesel range (n-C14-C18) enriched with n-C15 hydrocarbon. Reaction time influenced the selectivity to n-C15 hydrocarbon. Both catalysts showed promising hydrodeoxygenation activity via the hydrodecarboxylation pathway. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). 
Co-Authors Ady Sumaryanto Alyaa Farrah Dibha Amini, Helda Wika Amini, Rekfa Wika Arda Rista Lestari Arie Srihardyastutie Aulann'iam Aulann'iam Aulanni'am Aulanni'am Bambang Ismuyanto Barlah Rumhayati Barlah Rumhayati Dasrul Dasrul Denis Al Karoma Dian Mulyani Eka Novitasari Eria Anggraini Fadillah Utami Prasetyaningtyas Fadlilah, Lilik Nur George Towar Ikbal Tawakkal Ikhtiarini, Nur Irfan Hanafi Arif Jatmiko Eko Witoyo Lailatul Rohmah M. Farid Rahman Moh. Farid Rahman Mohamad Lutfillah Momodou Salieu Sowe Momodou Salieu Sowe Mukesh Sharma Nelsy Dian Permatasari Noval Dwi Wijaya Nuraini Uswatun Chasana Prasetyo Adi Prima Yulianti Rana Ayu Ning Tyas Rekfa Wika Amini Retno Indriatie Rizki Wahyu Aji Wibowo Rurini R Rurini R Rurini Retnowati Shoja Ismela SIMON BAMBANG WIDJANARKO Siti Mariyah Ulfa Siti Nurul Afifah Solo, Anna Apriani Maniuk Suci Susanti Sudarminto Setyo Yuwono Tutik Setianingsih Warsito Warsito Wawan Sobari Widia Edy Kuncoro Widodo Widodo Yuga Adi Pranata