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All Journal Jurnal Rekayasa Bahan Alam dan Energi Berkelanjutan Jurnal Agro Industri Perkebunan CHEESA: Chemical Engineering Research Articles EDUTEC : Journal of Education And Technology Mitra Mahajana: Jurnal Pengabdian Masyarakat Journal La Edusci Proceedings of International Conference on Multidiciplinary Research Jurnal Pendidikan Indonesia Gemilang Jurnal Penelitian dan Pengkajian Ilmiah
shintawati, shintawati
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Coffee Powder Antioxidant and Acrylamide Activity in Different Processing and Roasting Methods Analianasari, A.; Berliana, D.; Shintawati, Shintawati
International Conference on Multidisciplinary Research Vol 4, No 1 (2021): ICMR
Publisher : Universitas Serambi Mekkah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/pic-mr.v4i1.3792

Abstract

This research aimed to analyze the antioxidant activity of processed ground coffee and the levels of acrylamide in roasted ground coffee at different temperature levels. The research method is a descriptive qualitative method by calculating antioxidant activity with UV-Vis spectrophotometer and acrylamide content by HPLC. The results showed that the levels of acrylamide produced from processing with different roasting levels were still below the tolerance limit and had strong antioxidant activity at various roasting levels with different processing methods. Keywords: Antioxidant, acrylamide, coffee powder
Optimization and Characterization of Adsorbent from Palm Kernel Shell Waste Using H3PO4 Activator Herlambang, M. Julian; Ramandani, Adityas Agung; Cendekia, Devy; Alvita, Livia Rhea; Wulandari, Yeni Ria; Shintawati, Shintawati; Purnani, Mawar Siti; Efendi, Dimas Amirul Mukminin Nur
CHEESA: Chemical Engineering Research Articles Vol. 6 No. 2 (2023)
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v6i2.15906.118-125

Abstract

Palm kernel shell is solid waste produced from the processing of crude palm oil (CPO). In this context, phosphoric acid (H3PO4) serves as an essential activator for producing an adsorbent with maximum micropore under operating conditions at a temperature of <450oC. Therefore, this study aimed to determine the optimal adsorbent condition of the palm kernel shell using H3PO4activator. The production process was optimized using Response Surface Methodology (RSM) and Central Composite Design (CCD) methods with activator concentration variations of 4%, 5%, and 6%, at activation times of 23 hours, 24 hours, and 25 hours, respectively. The quality of the adsorbent produced fulfilled SNI standard 06-3730-1995, characterized by water content of 1.001%, ash content of 5.767%, missing substance level of 18.932%, and fixed carbon content of 75.301%. Furthermore, this work effectively optimized the RSM and CCD adsorbent production process, achieving 4.785% variation in activator concentration and 24.679 hours activation time.
Pengaruh Metode Pengarangan dan Ukuran Partikel Terhadap Kualitas Briket Cangkang Kelapa Sawit: Effect of Combustion Method and Particle Size on the Quality of Palm Shell Briquettes Shintawati, Shintawati; Ermaya, Dewi; Wulandari, Yeni Ria; Sukaryana, Yana; Fernando, Riki
Jurnal Rekayasa Bahan Alam dan Energi Berkelanjutan Vol. 8 No. 1 (2024)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rbaet.2024.008.01.03

Abstract

Salah satu sumber energi terbarukan adalah biomassa. Biomassa merupakan bahan organik yang umumnya berasal dari tanaman. Briket bioarang merupakan bahan bakar padat dan berasal dari biomassa yang diarangkan terlebih dahulu. Penelitian ini bertujuan untuk mengkaji pengaruh metode pengarangan dan ukuran partikel terhadap kualitas briket.  Penelitian ini menggunakan metode pengarangan torefaksi pada suhu 200°C, 300°C dan pengarangan manual. Ukuran partikel arang divariasikan 20 dan 40 mesh. Parameter yang uji adalah kadar air, nilai kalor, kadar karbon terikat, kadar zat menguap, kadar abu, densitas dan laju pembakaran. Hasil penelitian menunjukkan tipe pengarangan torefaksi mampu meningkatkan kualitas briket melalui peningkatan nilai kalor, kadar karbon terikat dan menurunkan  kadar air serta zat menguap serta dihasilkannya produk asap cair sebanyak 48,5%. Kualitas briket hasil pengarangan torefaksi suhu 3000°C ukuran arang 20 mesh memenuhi mutu I SNI 01-6235-2000 dengan nilai kalor, kadar air masing-masing adalah 6841 kal/g, 3,52 % dan kadar karbon terikat, zat menguap, abu, densitas serta laju pembakaran masing-masing adalah 50,06%, 37,59%,  8,13%,  1,71 g/cm3, 0,076 g/menit
Kinetika Ekstraksi Minyak Atsiri Lada Hitam (Piper nigrum) Secara Hidrodistilasi Shintawati, Shintawati; Analianasari, Analianasari; Zukryandry, Zukryandry
CHEESA: Chemical Engineering Research Articles Vol. 3 No. 2 (2020)
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v3i2.7388.63-70

Abstract

Lada hitam dikenal dengan nama King of Spices yang merupakan salah satu komoditi unggulan ekspor asal Provinsi Lampung. Lada hitam memiliki aroma dan rasa pedas yang khas. Kontribusi aroma berasal dari senyawa volatile yang terkandung pada minyak atsiri dalam lada hitam. Minyak atsiri lada diperoleh dari ekstraksi pelarut, hidrodistilasi, distilasi uap, distilasi fluida super kritik dan  hidrodistilasi menggunakan microwave. Nilai konsentrasi minyak atsiri selama ekstraksi serta laju ekstraksi dapat diprediksi dari model kinetika. Tujuan penelitian ini adalah mempelajari ekstraksi minyak atsiri lada hitam dan mengetahui model kinetika ekstraksi minyak atsiri lada hitam secara hidrodistilasi. Hidrodistilasi dilaksanakan selama 5 jam dengan pengambilan data setiap 15 menit. Hasil penelitian memperlihatkan kinetika ekstraksi lada hitam mengikuti model kinetika ekstraksi orde kedua.  Nilai parameter kinetika orde kedua dari ekstraksi minyak atsiri lada hitam yaitu kapasitas ekstraksi minyak atsiri lada,Cs, laju awal ekstraksi, h, dan konstanta laju ekstraksi, k masing-masing adalah 4,9 gL-1, 0,206 g L-1menit-1 dan 0,0086 g-1L menit-1 dan nilai determinasi sebesar 99,97%. Hasil eksperimen didapat perolehan ekstraksi sebesar 5,14%.
Pemanfaatan Lignin Serai Wangi Sebagai Lignin Resorsinol Formaldehida (LRF) Menggunakan Ultrasonic Microwave-Assisted Extraction (UMAE) Ramandani, Adityas Agung; Shintawati, Shintawati; Aji, Salomo Pranata; Sunarsi, Sunarsi
CHEESA: Chemical Engineering Research Articles Vol. 5 No. 1 (2022)
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v5i1.10348.40-48

Abstract

Limbah padat serai wangi mengandung lignin cukup tinggi yang dapat berpotensi untuk dikembangkan menjadi berbagai produk komersial, salah satunya adalah perekat. Tujuan dari penelitian ini adalah untuk mendapatkan kondisi optimum dalam pembuatan lignin resorsinol formaldehida (LRF) dari limbah serai wangi menggunakan metode Ultrasonic Microwave-Assisted Extraction (UMAE). Rancangan percobaan menggunakan response surface methodology (RSM) khususnya Box-Behnken Design (BBD). Variabel bebas dalam riset ini adalah volume NaOH (10, 13 dan 16 mL), waktu reaksi (10, 20 dan 30 menit), dan komposisi perekat (4, 6 dan 8 gram). Hasil penelitian menunjukkan perekat lignin LRF yang dihasilkan memenuhi SNI 06-4567-1998 untuk parameter berat jenis, waktu gelatinisasi, dan sisa penguapan. Daya tahan rekat (delaminasi) LRF yang dihasilkan memenuhi standar JAS 1996 yaitu rata rata 0%. Kondisi optimum pembuatan LRF dicapai pada penambahan NaOH 15,0561 mL, waktu reaksi 20 menit dan massa lignin 4 gram dengan daya tahan rekat (delaminasi) tertinggi yang dihasilkan 1 %.
Silica Adsorption from Boiler Effluent Using Activated Charcoal Derived from Palm Oil Fibre Waste with H3PO4 Activator Fernando, Ricky; Shintawati, Shintawati; Alvita, Livia Rhea; Wulandari, Yeni Ria; Ramandani, Adityas Agung; Arief, Febrina
CHEESA: Chemical Engineering Research Articles Vol. 7 No. 2 (2024): In Progress
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v7i2.17500.75-83

Abstract

Most waste from palm oil processing can be repurposed, such as using palm fibre waste to create activated charcoal. This study aimed to assess the effectiveness of activated charcoal, produced by activating palm fibre with H₃PO₄, in removing silica from boiler output water. The production process involved pyrolysis at 200ºC for 2.5 hours. A completely randomized design was employed to test the effects of different H₃PO₄ concentration (with 1 to 2 M) and reaction times (30, 60, and 90 min). Results revealed that the moisture content of the activated charcoal ranged from 1.96% to 2.42%, ash content from 9.82% to 21.63%, and iodine adsorption from 366.43 to 457.87 mg/g. The highest silica adsorption capacity (3.5 g/g) was achieved with 2 M H₃PO₄ for 90 min. This indicates that palm fibre-derived activated charcoal is effective for silica removal, highlighting it is potential for enhancing environmental sustainability in industrial sector.
PEMANFAATAN LIMBAH KELAPA MENJADI PRODUK RECYCLE RAMAH LINGKUNGAN DI PONDOK PESANTREN DARUL IMAN Alvita, Livia Rhea; Shintawati, Shintawati; Ermaya, Dewi; Afifah, Dian Ayu; Cendekia, Devy; Elsyana, Vida
Mitra Mahajana: Jurnal Pengabdian Masyarakat Vol. 5 No. 3 (2024): Volume 5 Nomor 3 Tahun 2024
Publisher : LPPM Universitas Flores

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37478/mahajana.v5i3.4706

Abstract

Darul Iman is an Islamic boarding school located in Tanjung Sari Village, Natar District, South Lampung, which is the area around the Rejosari coconut factory. The coconut factory produces waste, one of which is coconut fibre. Coconut fibre can be reused and has a big opportunity to improve the surrounding community's economy, who generally work as farmers and casual daily workers at the factory. This community service activity aims to provide technical knowledge and skills to students in utilising coconut waste into environmentally friendly recycled products to be distributed back to the surrounding community or implemented themselves. The method used in this PkM activity consists of several stages, namely education on processing waste into coco fibre and how to make the product, then continued with technical guidance on making environmentally friendly recyclable products in the form of doormats and brooms. The effectiveness of PKM activities is evaluated by carrying out a pretest and posttest. The evaluation results show that the average posttest percentage score is 90%, getting a score of more than 70, this indicates that there has been an increase in technical knowledge and skills related to making environmentally friendly recyclable products from coconut fibre waste among the Darul Iman Islamic Boarding School students.
Pemodelan Kondisi Optimum Ekstraksi dan Identifikasi Senyawa Penyusun Minyak Atsiri Lada Hitam Shintawati, Shintawati; Analianasari, Analianasari; Zukryandry, Zukryandry
Jurnal Agro Industri Perkebunan Vol. 9 No. 2 (2021)
Publisher : Politeknik Negeri Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/jaip.v9i2.2132

Abstract

Black pepper is a spice with a spicy taste and a distinctive aroma that has become known as the King of Spices. The distinctive aroma of black pepper comes from the volatile compounds that make up the essential oil of pepper. Black pepper essential oil has antimicrobial properties that can relieve respiratory infections and relieve muscle disorders. The acquisition of pepper essential oil from the distillation process is influenced by operating conditions. The aim of this study was to identify the composition of black pepper essential oil compounds using GCMS and to optimize the operating conditions (material size, solvent ratio, and distillation time). The method used to determine the optimum condition is using the Response Surface Method (RSM). The results showed that the highest yield of black pepper essential oil from this experiment is 5.14%. The empirical model was also suitable for the experiment and the optimum conditions for producing the maximum pepper oil yield 5,81% were 40 mesh of material size, 0.12 (g.ml-1) of solvent ratio and 162 minutes of distillation time. GCMS test results showed that the main constituents of pepper essential oil are caryophyllene, ocimene, limonene, carene, and a-pinene.
The Influence of Principal Academic Supervision, Lead Teacher Competence, and Work Environment on Lead Teacher Capacity Shintawati, Shintawati; Hanafie, H. M. Syadeli; Hendrayana, Aan
Journal La Edusci Vol. 6 No. 2 (2025): Journal La Edusci
Publisher : Newinera Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37899/journallaedusci.v6i2.2258

Abstract

The discourse on teacher leadership in developing contexts has long suffered from a narrow gaze, obsessed with competencies, yet blind to conditions; fixated on training, yet inattentive to power. This study disrupts that pattern. Anchored in the evolving landscape of Indonesia’s Guru Penggerak (Mobilizing Teacher) program, we offer a systems-level examination of what truly drives teacher capacity in public elementary schools. Through a robust quantitative analysis, we illuminate the triadic architecture of capacity-building: principled supervision, professionally grounded competence, and an ecologically supportive work environment. The results are not subtle; together, these factors explain 93.4% of the variance in mobilizing teacher capacity. But the implication is not merely statistical. It is structural, cultural, and political. We argue that academic supervision must be reimagined, not as a mechanism of oversight but as a dialogic practice of pedagogical stewardship. Teacher competence must be untethered from static checklists and understood as a socially constructed, morally anchored, and continuously evolving enactment of professionalism. The work environment, too often treated as backdrop, is revealed here as a core determinant of whether teacher leadership is cultivated or crushed. This is not a call for more policy, it is a demand for coherence. Without structural alignment among leadership practices, professional learning ecosystems, and institutional cultures, no reform initiative, no matter how visionary, will outlive its training modules.
Pengaruh Bantuan Modal Usaha dan Pelatihan Kewirausahaan terhadap Pertumbuhan UMKM (Studi Kasus UMKM Kota Bandung yang Tergabung dalam Badan Kerjasama Organisasi Wanita) Shintawati, Shintawati; Narimawati, Umi
CENDEKIA : Jurnal Penelitian dan Pengkajian Ilmiah Vol. 2 No. 8 (2025): CENDEKIA : Jurnal Penelitian Dan Pengkajian Ilmiah, Agustus 2025
Publisher : Lembaga Pendidikan dan Penelitian Manggala Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62335/cendekia.v2i8.1583

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh bantuan modal usaha dan pelatihan kewirausahaan dalam meningkatkan pertumbuhan UMKM. Dalam kajian ini penulis menggunakan riset dengan pendekatan kuantitatif dan metode survei. Sebanyak 96 pengusaha UMKM dijadikan responden dan dipilih secara purposif. Data dianalisis menggunakan regresi linier berganda. Hasil penelitian menunjukkan sebagai berikut: Pertama, Modal usaha dan pelatihan berpengaruh secara signifikan terhadap peningkatan usaha UMKM secara bersama-sama. Kedua, Modal usaha berpengaruh secara signifikan terhadap peningkatan perkembangan UMKM secara parsial. Ketiga, Pelatihan berpengaruh secara signifikan terhadap peningkatan perkembangan UMKM secara parsial.
Co-Authors Aan Hendrayana Afifah, Dian Ayu Aji, Salomo Pranata Alvita, Livia Rhea Analianasari Analianasari Arief, Febrina Berliana, D. Cendekia, Devy Cucu Atikah Dewi Ermaya Efendi, Dimas Amirul Mukminin Nur Elsyana, Vida Fernando, Riki Hanafi, Muhammad Syadeli Hanafie, H. M. Syadeli Hasibuan, Heni Yunilda Herlambang, M. Julian Lilik Nur Kholidah Oktaf Rina Purnani, Mawar Siti Ramandani, Adityas Agung Ricky Fernando Sunarsi, Sunarsi Syarifudin, Encep Umi Narimawati Wulandari, Yeni Ria Yana Sukaryana zukryandry, zukryandry