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All Journal BERKALA SAINSTEK KOVALEN: Jurnal Riset Kimia Jurnal Penelitian Sains Indonesian Journal of Pure and Applied Chemistry Jurnal Basicedu Share : Journal of Service Learning AL-ULUM: JURNAL SAINS DAN TEKNOLOGI Reswara: Jurnal Pengabdian Kepada Masyarakat Jurnal Al Ulum: LPPM Universitas Al Washliyah Medan Jurnal Teknik Terapan (J-TETA) Sainteks: Jurnal Sain dan Teknik Serambi Engineering
Hilman Imadul Umam
Universitas Singaperbangsa Karawang
Religion Agriculture, Biological Sciences & Forestry Arts 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 Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Mechanical Engineering Physics Social Sciences

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Pengaruh Pembelajaran Berbasis Proyek Terhadap Keterampilan Berpikir Kreatif Ilmiah Sebagai Salah Satu Keterampilan Abad 21 Hilman Imadul Umam; Salma Hikmatul Jiddiyyah
Jurnal Basicedu Vol 5, No 1 (2021): February 2021, Pages 1-445
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/basicedu.v5i1.645

Abstract

Penelitian ini dilakukan untuk mengetahui pengaruh pelaksanaan pembelajaran berbasis proyek terhadap keterampilan berpikir kreatif ilmiah siswa SMA dalam materi fluida dinamis. Keterampilan berpikir kreatif ilmiah merupakan salah satu keterampilan abad 21 yang sangat penting dimiliki oleh peserta didik supaya bisa beradaptasi terhadap perubahan. Desain penelitian yang digunakan adalah one-group pretest-posttest design. Setelah dilaksanakan pembelajaran berbasis proyek pada sampel yang diteliti ternyata menunjukan adanya pengaruh terhadap peningkatan keterampilan berpikir kreatif ilmiah berdasarkan perhitungan effect size (d). Pelaksanaan pembelajaran berbasis proyek secara umum berpengaruh dalam meningkatkan keterampilan berpikir kreatif ilmiah berdasarkan nilai effect size (d) sebesar 1,32. Selanjutnya ditinjau berdasarkan aspek-aspek dari keterampilan berpikir kreatif ilmiah secara khusus, bahwa pembelajaran berbasis proyek berpengaruh dalam meningkatkan aspek thinking-fluency-technical product dan thinking-originality-technical product dengan nilai effect size (d) masing-masing sebesar 1,35 dan 1,21, tetapi tidak cukup efektif dalam meningkatkan aspek thinking-flexibility-technical product yang ditunjukan dari nilai effect size (d) yang hanya sebesar 0,14
SYNTHESIS OF MAGNETITE-MODIFIED NATURAL ZEOLITE USING COPRECIPITATION AND PHYSICAL MIXING TECHNIQUES Teguh Pambudi; Hilman Imadul Umam
Indonesian Journal of Pure and Applied Chemistry Vol 6, No 3 (2023)
Publisher : Tanjungpura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/indonesian.v6i3.66363

Abstract

The synthesis of magnetite-modified natural zeolite has been carried out using two techniques, namely coprecipitation and physical mixing. The characteristics (crystallinity, pore characteristics, and recovery capabilities) of the resulting composites are compared. In addition, the effect of the Fe3O4 fraction (25.0% w/w, 33.3% w/w, and 50.0% w/w) on the composite characteristics was also evaluated. The results showed that the natural zeolite/Fe3O4 prepared using the coprecipitation technique showed better distribution of Fe3O4 than the physical mixing technique. It was observed that the natural zeolite's XRD peak intensity decreased as the Fe3O4 content increased. In accordance with the N2 adsorption-desorption isotherm, the pore spaces of the natural zeolite have been found to be filled by suspended Fe3O4 particles. Therefore, both natural zeolite/Fe3O4 prepared by coprecipitation and physical mixing had smaller pore diameters than washed natural zeolite. Then, in terms of recovery ability, natural zeolite/Fe3O4 prepared using the coprecipitation technique has greater recovery ability than natural zeolite/Fe3O4 prepared by physical mixing, with an increase in the Fe3O4 percentage typically enhancing the composite's recovery ability.
PELATIHAN PEMBUATAN HANDSANITIZER BERFORMULASI WHO SERTA EDUKASI PERILAKU HIDUP BERSIH DAN SEHAT DI SDN SUKATANI III KARAWANG Teguh Pambudi; Hilman Imadul Umam; Meka Saima Perdani; Aulia Wahyuningtyas; Alfieta Rohmaful Aeni; Fitri Yuliasari
Share: Journal of Service Learning Vol. 9 No. 2 (2023): AUGUST 2023
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/share.9.2.109-114

Abstract

Telah dilaksanakan kegiatan pelatihan pembuatan handsanitizer serta sosialisasi perilaku hidup bersih dan sehat (PHBS) pada siswa-siswi khususnya kelas empat sampai kelas enam SDN Sukatani III Kab. Karawang. Kegiatan pelatihan tersebut dilaksanakan melalui dua sesi yaitu pelatihan terstruktur dan pelatihan partisipatif. Pelatihan terstruktur dilaksanakan melalui metode penyampaian materi aktif dan interaktif melalui ceramah dan demonstrasi mengenai sosialisasi PHBS dan pengarahan cara mencuci tangan yang baik serta demonstrasi pembuatan handsanitizer yang dilakukan oleh pemateri. Selanjutnya pelatihan partisipatif dilaksanakan dengan melakukan praktek langsung pembuatan handsanitizer sesuai dengan prosedur pembuatan handsanitizer yang dikeluarkan oleh WHO. Kegiatan pelatihan pembuatan handsanitizer dan sosialisasi PHBS menjadi salah satu upaya dalam menghadapi kondisi pasca pandemi Covid-19. Hasil dari kegiatan sosialisasi PHBS di lingkungan sekolah ini mampu meningkatkan pengetahuan siswa mengenai PHBS yang dapat diterapkan di lingkungan rumah dan sekolah dalam melaksanakan kegiatan belajar di masa adaptasi pasca pandemi Covid-19. Pada kegiatan praktek langsung pembuatan handsanitizer para peserta mampu meningkatkan keterampilan sains, meningkatkan wawasan peserta mengenai profesi sainstis, serta mampu meningkatkan pengetahuan peserta mengenai alat dan bahan kimia. Tindak lanjut dari kegiatan pelatihan ini supaya terus dilakukan evaluasi berkala terkait PHBS di lingkungan SDN Sukatani III Kab. Karawang. Untuk mengoptimalkan hasil sosialisasi maka perlu didukung dengan berbagai media seperti poster PHBS yang ditempel di lingkungan sekolah.
EDIBLE FILM FOR FOOD PACKAGING Hakimah Nurjanah; Hilman Imadul Umam; Teguh Pambudi
AL ULUM: JURNAL SAINS DAN TEKNOLOGI Vol 9, No 3 (2023)
Publisher : UPT Publication and Journal Management, Islamic University of Kalimantan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31602/jst.v9i3.12639

Abstract

The purpose of this review article is to provide information about edible film, materials used, manufacturing methods, application for food packaging, and opportunities for future benefits of edible film. The method used by the author in reviewing this article, is by reading various journals from other authors and write the conclude using author own language. The conclusion is, edible film has potential to replace plastics (synthetic polymers) as food packaging. The ingredients used for edible film production are hydrocolloid (protein, polysaccharides, and alginates), lipid (polysaccharides, and alginates) and composite (mix of hydrocolloid and lipid). The methods for edible film production are wet process and dry process. Edible film can be used as food packaging, including cheese, meat, fish, vegetables, and fruit. Prospect of edible film has the potential to increase in the future because people are realizing the importance of reducing food waste with ecofriendly material as food packaging.
OPTIMALISASI PEMANFAATAN LIMBAH SEKAM PADI SEBAGAI BAHAN BRIKET MELALUI KEGIATAN WORKSHOP DAN ANALISIS NILAI EKONOMINYA Saniatun Wilda; Hilman Imadul Umam; Teguh Pambudi
RESWARA: Jurnal Pengabdian Kepada Masyarakat Vol 5, No 1 (2024)
Publisher : Universitas Dharmawangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46576/rjpkm.v5i1.4001

Abstract

Tingkat penggunaan bahan bakar fosil yang tinggi memiliki dampak yang sangat berbahaya terhadap bumi. Oleh karena itu, penting untuk mengeksplorasi serta mengadopsi sumber energi alternatif. Biomassa dianggap sebagai sumber bahan bakar yang menjanjikan karena ketersediaannya yang melimpah di alam. Desa Telukambulu yang memiliki luas lahan sawah 84% dari total luas wilayahnya sehingga tidak hanya menghasilkan produk hasil pertanian yang bisa diperjualbelikan, tetapi juga menghasilkan limbah pertanian yang cukup besar khususnya limbah sekam padi. Oleh karena itu, penting untuk dilakukan pelatihan dalam memanfaatkan limbah sekam padi menjadi bahan bakar alternatif berupa briket. Kegiatan dirancang melalui dua sesi pelatihan, yakni pelatihan terstruktur dan pelatihan partisipatif. Pelatihan terstruktur mencakup sosialisasi mengenai briket dan pemaparan materi mengenai analisis ekonomi produk briket dengan metode ceramah, sementara pelatihan partisipatif melibatkan demonstrasi langsung pembuatan briket. Hasil kegiatan pelatihan kemudian dievaluasi, hasilnya lebih dari 80% peserta sangat setuju bahwa pelatihan yang dilakukan memberi pengetahuan, memberi gambaran teknis pembuatan briket dari limbah sekam padi, serta memberikan pengetahuan terkait analisis nilai ekonomi dari produk briket ketika dikomersilkan. Selain itu, sekitar 75% peserta terdorong untuk melakukan pengolahan limbah sekam padi menjadi briket untuk dikomersilkan. Sehingga perlu ada upaya tindak lanjut secara berkala untuk memastikan pemanfaatan limbah tetap optimal. Secara keseluruhan, pelatihan ini tidak hanya memberikan manfaat langsung kepada peserta, tetapi juga membuka potensi baru bagi masyarakat desa dalam memanfaatkan sumber daya lokal secara berkelanjutan, sekaligus mengurangi dampak negatif limbah terhadap lingkungan.
Pengaruh Ukuran Partikel dan Suhu Terhadap Derajat Asetilasi dan Yield Pada Ekstraksi Kitin dari Belalang Melalui Green Method: The Effect of Particle Size and Temperature on the Degree of Acetylation and Yield in Chitin Extraction from Grasshoppers Using the Green Method Savitri, Meila; Pangestoe, Safina Handayani; Hilman Imadul Umam; Meka Saima Perdani; Teguh Pambudi
KOVALEN: Jurnal Riset Kimia Vol. 10 No. 2 (2024): August Edition
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2024.v10.i2.17268

Abstract

Grasshoppers are insects that are pests for agriculture. In recent years, humans have begun to realize the broader economic value of insects, which are not only used as animal feed but also as sustainable biopolymers, such as chitin and chitosan. Grasshoppers' body organs contain chitin, including the digestive tract (intestine), trachea system, and exoskeleton (outer skeleton). Currently, the chitin extraction process using the green method with Deep Eutectic Solvent (DES) is more popular because it reduces the use of dangerous chemicals, reduces waste, and is overall more environmentally friendly than using chemical and biological methods. In the chitin extraction process, process parameters, such as reaction time, temperature, and particle size of the raw material, are adjusted to obtain the desired properties of chitin. This research aims to determine the effect of particle size and temperature on chitin yield and degree of acetylation (DA). The research results show that the yield values ​​and DA values ​​produced in this research are not by similar references which have described the characteristics of chitin. However, there is one sample showing that the most optimal DA value is the BSC 7 150 mesh 90°C sample, at wavelengths of 1560 cm-1 and 2875 cm-1, producing a DA value of 55.79514% and DD 44.20485933%. The best yield value was BSC 2 110°C 50 mesh, with a value of 22.1%.
Preliminary study of chitin extraction from crickets (acheta domesticus) using deep eutectic solvent Nur Fadila, Salsabil Intan; Athirah, Febriana Azhar; Perdani, Meka Saima; Pambudi, Teguh; Umam, Hilman Imadul
Sainteks: Jurnal Sain dan Teknik Vol 6 No 2 (2024): September
Publisher : Universitas Insan Cendekia Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37577/sainteks.v6i02.774

Abstract

Pada penelitian ini telah dilakukan ekstraksi kitin dari Jangkrik Rumah (Acheta Domesticus) melalui green process menggunakan Deep Eutectic Solvent (DES). DES yang digunakan dibuat dari komposisi Choline Chloride:Citric Acid Monohydrate dengan perbandingan molar 1:2. Proses ekstraksi dilakukan dengan variasi waktu (2, 4, dan 6 jam) dan perbandingan bahan baku dengan pelarut (1:10, 1:15 dan 1:20). Jangkrik rumah memiliki kandungan protein sebesar 20–40%, lemak sebesar 25%, mineral seperti kalsium dan juga kitin. Penelitian ini mengeksplorasi potensi jangkrik rumah untuk menjadi bahan baku kitin. Tujuan dari penelitian ini adalah mengetahui pengaruh perbandingan bahan baku dengan jumlah pelarut dan waktu ekstraksi terhadap nilai rendemen dan derajat asetilasi serangga jangkrik rumah. Hasil penelitian ini menunjukkan kandungan rendemen kitin pada sembilan sampel sekitar 45% hingga 94% dan DA pada bilangan gelombang 1560 cm-1 dan 2875 cm-1 sekitar 68.17% hingga 957.70%, hal ini dikarenakan masih terdapat sisa DES, protein yang ditunjukkan pada FTIR pita gelombang 1540 cm−1 dan kandungan mineral yang ditunjukkan pada peregangan O-H dan NH di pita 3450 cm-1 dan 3270 cm-1 sampel kitin. Pengaruh perbandingan bahan baku dengan pelarut dan waktu ekstraksi juga dapat mempengaruhi nilai DA dan rendemen. Namun hasil optimum DA yang diambil pada bilangan gelombang 1560 cm-1 dan 2875 cm-1 yaitu pada sampel JRC 215 sebesar 68.17% dan rendemen kitin pada sampel JRC 410 dengan presentase rendemen 45.50%.
Preliminary Study of Chitin Extraction from House Crickets (Acheta Domesticus) Through Green Process Using Deep Eutectic Solvent (DES) Chlorine Chloride - Urea Athirah, Febriana Azhar; Umam, Hilman Imadul; Nur Fadila, Salsabil Intan; Pambudi, Teguh; Perdani, Meka Saima
BERKALA SAINSTEK Vol 12 No 3 (2024)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bst.v12i3.47769

Abstract

Insects serve as a sustainable alternative source of chitin compared to crustaceans, due to their advantages in availability, reproductive rates, and resilience to environmental conditions. Chitin is a natural biopolymer widely utilized in various industries, including food, pharmaceuticals, and biotechnology. This study represents a preliminary investigation aimed at evaluating the effects of varying solution ratios and stirring times on the yield of chitin and the degree of acetylation (DA) obtained from insect chitin extraction using a Green Process with Deep Eutectic Solvent (DES) composed of Choline Chloride (ChCl) and Urea in a molar ratio of 1:2 (w/w). The extraction process involved varying the solution-to-raw material ratios (1:10, 1:15, 1:20) and stirring times (2, 4, 6 hours). Analysis was performed using FTIR to measure DA, and yield calculations were based on the mass comparison before extraction. The results indicated that the DA values and mass yields were lower than those reported in the literature, likely due to residual impurities and the incomplete removal of DES from the samples. The highest DA value of 78.44% was achieved in the sample with a 1:10 ratio and a stirring time of 6 hours, while several other samples exhibited lower DA values due to ineffective deproteinization. This preliminary study provides an important foundation for further research, emphasizing improvements in extraction and purification methods to enhance the quality of the produce.
Chitin extraction from house crickets (acheta domesticus) using a green method with sonication heating Shakila, Tasya Nur; Sonia, Gita; Anjani, Cindy Salsabilla; Pambudi, Teguh; Umam, Hilman Imadul; Fauzie, Azis Kemal; Putri, Fajar Amelia Rachmawati
Sainteks: Jurnal Sain dan Teknik Vol 7 No 01 (2025): Maret
Publisher : Universitas Insan Cendekia Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37577/sainteks.v7i01.867

Abstract

Chitin extraction from house crickets (Acheta domesticus) has been optimized by combining a green method using Deep Eutectic Solvent (DES) and sonication heating, thereby reducing environmental impact and improving time efficiency. The extraction process consisted of insect preparation, delipidation, demineralization, and deproteinization. The results show that the green process method with DES and sonication heating is effective in enhancing time efficiency, reducing mineral content by 56.52%, decreasing protein content by 84.94%, and increasing the degree of acetylation by 21%. However, there was a slight difference in the deproteinization results when compared to the cricket samples treated with reflux. FTIR analysis confirmed the purity and structural characteristics of the extracted chitin
Analisis Performa Heater Pada Unit Heat Transfer Medium di Polymer Plant dengan Produk Sumber Pemanas Puput Ayu Wulandari, Puput; Hilman Imadul Umam, Hilman; Aurelius Airlangga Suryo Wicaksono, Aurelius
Jurnal Serambi Engineering Vol. 10 No. 2 (2025): April 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

One of the main requirements in polymer processing is heat. A fired heater is used in the Heat Transfer Medium unit to obtain heat. The efficiency, heat loss, and specific consumption of fired heaters greatly impact the efficiency of energy use in processing. According to SNI, to maintain the efficiency of the fired heater, it is necessary to periodically review its performance using direct and walkthrough methods. The analysis results from three consecutive days showed an efficiency of 87%, 89%, and 89%. The heat loss was 13%, 11%, and 11%. The specific consumption was 70.66, 72.65, and 72.69 Nm³/ton. Overall, these values meet SNI standards: 92% efficiency, 10-15% heat loss, and ≥74 Nm³/ton specific consumption. However, to maintain or increase the efficiency value, it is necessary to monitor operating conditions and conduct regular periodic checks to prevent system leaks that increase heat loss and reduce efficiency.
Co-Authors Alfieta Rohmaful Aeni Anjani, Cindy Salsabilla Athirah, Febriana Azhar Aulia Wahyuningtyas Aurelius Airlangga Suryo Wicaksono, Aurelius Christin Octaviani Sitanggang Dian, Amalia Eti Ayu Nurhana Fauzie, Azis Kemal Fitri Yuliasari Hakimah Nurjanah Meka Saima Perdani Meka Saima Perdani Nur Fadila, Salsabil Intan Pangestoe, Safina Handayani Perdani, Meka Saima Puput Ayu Wulandari, Puput Putri, Fajar Amelia Rachmawati Salma Hikmatul Jiddiyyah Saniatun Wilda Savitri, Meila Shakila, Tasya Nur Sonia, Gita Teguh Pambudi