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All Journal EKSAKTA: Journal of Sciences and Data Analysis Asian Journal of Innovation and Entrepreneurship (AJIE) IJCR (Indonesian Journal of Chemical Research)
Prakoso, Nurcahyo Iman
UII
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Economics, Econometrics & Finance Materials Science & Nanotechnology

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PEMANFAATAN BAHAN ALAM DALAM KONSERVASI DAN ANALISIS PRASASTI TIMAH Prakoso, Nurcahyo Iman; Alifia Tia , Aulia; Ria Diar Stya, Primastiti
INDONESIAN JOURNAL OF CHEMICAL RESEARCH Vol. 10 No. 1 (2025): Volume 10, ISSUE 1, 2025
Publisher : Chemistry Department, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijcr.vol10.iss1.art4

Abstract

Artifact preservation efforts require conservation approaches that are environmentally friendly and compatible with the original materials of the object. This study examines the use of natural materials in artifact conservation, focusing on three main materials: rabbit skin glue as an adhesive, beeswax as a protective layer, and compositional analysis on tin inscriptions. FTIR testing showed the presence of protein content in rabbit skin that can produce gelatin to be used as an adhesive. Rabbit skin glue adhesion testing was conducted on ceramic and wood media with various glue concentrations (5%, 10%, 15%, 20%, and 37.5%) under humid conditions (90% humidity and 26°C temperature) for three consecutive days. The test results showed that on the third day, only the 37,5% concentration was able to survive. In the colorimetric test, the average value of ∆E was still below 4, thus, rabbit skin glue is still safe to be used in conservation. In the case of beeswax, the mixture of beeswax with olive oil proved to be superior to the mixture of beeswax with turpentine, as it produced a more even, glossy coating, and provided better protection against moisture and prevented mold growth more effectively. XRF analysis of the tin inscriptions revealed that the main composition of the inscriptions was tin (Sn) with the highest content of 93,145% in inscription D, while lead (Pb) was found with the highest content of 21,755% in inscription A. Overall, this study shows that natural materials such as rabbit skin glue and beeswax have good potential in artifact conservation applications, providing a safer and more effective alternative compared to synthetic materials, especially in maintaining the authenticity and durability of artifacts against damaging environmental influences.
Molecular Modeling of An Analog Of Curcumin Compounds Pentagamavunon-0 (PGV-0) And Pentagamavunon-1 (PGV-1) Through Computational Chemistry Methods Ab-Initio HF/4-31G Prakoso, Nurcahyo Iman; Hakim, Lukman; Hidayati, Nuri
INDONESIAN JOURNAL OF CHEMICAL RESEARCH VOLUME 2, ISSUE 1-2, 2017
Publisher : Chemistry Department, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1474.984 KB) | DOI: 10.20885/ijcr.vol2.iss1.art4

Abstract

Breast cancer is the second largest number of cancer cases in Indonesia, after cervical cancer. The growth of these cancer cells can be prevented with compounds Pentagamavunon-0 (PGV-0) and Pentagamavunon-1 (PGV-1). This compound is an analog of curcumin compounds that have anti breast cancer activity. Modeling the structure of compound PGV-0 and PGV-1 through computational chemistry methods Ab-initio HF/4-31G could be used to predict the geometry and structure elucidation spectra associated with pharmacological activity such as anticancer compounds theoretically.This research involves modeling the structures and spectra prediction calculation compounds PGV-0 and PGV-1 by computational chemistry methods Ab-initio HF/4-31G, using Gaussian03W. The result using Ab-initio HF/4-31G method then compared with data from experimental geometry and the results of calculations with AM1.The results showed that computational chemistry methods Ab-initio HF/4-31G calculations give better results for modeling the structure compared semiempirik method AM1.
Application of Lignin as Adsorbent for Silver (Ag) and Copper (Cu) on Electroplating Waste in Kota Gede Prakoso, Nurcahyo Iman
INDONESIAN JOURNAL OF CHEMICAL RESEARCH VOLUME 3, ISSUE 1, 2018
Publisher : Chemistry Department, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (288.013 KB) | DOI: 10.20885/ijcr.vol3.iss1.art1

Abstract

Lignin was a component of wood and always eliminated by chemical processing in many industries. On the other hand, oil palm bunches were the waste of palm oil industry, where that also containing high lignin.This study used lignin from residual waste of palm oil industry as biomass to adsorb silver (Ag) and copper (Cu) metal that is contained in electroplating waste by looking at lignin mass ratio, temperature and time in order to obtain optimal adsorption condition. The mass variations used were 100 mg, 200 mg, 300 mg, 400 mg, and 500 mg. While for the variation of contact time were 2 hours, 3 hours, 4 hours, 5 hours, 6 hours. For temperature variations were 30 °C, 40 °C, 50 °C,   and  60 °C.The results showed that the most optimal lignin mass ratio in adsorbing silver and copper metals was 200 mg/ 50 mL. While the most optimal contact time were 4 hours for Ag and 2 hours for Cu. For the most optimum temperature in adsorbing Ag metal at 50 °C and for Cu metal at 30 °C.
Temperature Effects on Growth and Culture Stability of Chlorella sp. in Laboratory Cultivation Anggraini, Winda Trisna; Santoso, Ruth Suci Wadini; Saputri, Wulandari Prasetya; Prakoso, Nurcahyo Iman; Utami, Maisari; Sasongko, Setyo Yanus; Purwiandono, Gani
INDONESIAN JOURNAL OF CHEMICAL RESEARCH Vol. 11 No. 1 (2026): Volume 11, ISSUE 1, 2026
Publisher : Chemistry Department, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijcr.vol11.iss1.art5

Abstract

The growth behavior of chlorella sp. was evaluated under different temperature conditions to examine how thermal variation influences microalgal biomass production and culture dynamics. Cultivation experiments were conducted at 28, 35, and 40°C under continuous illumination with aeration. Biomass accumulation was monitored through optical density measurements at 680 nm, while physicochemical parameters including pH and total dissolved solids (TDS) were recorded throughout cultivation. Stable biomass accumulation was observed at 28°C, whereas growth became less consistent at 35°C and declined at 40°C, indicating increasing thermal stress at higher temperatures. Variations in pH and TDS during cultivation supported the observed temperature-dependent metabolic response. The analytical workflow used to monitor microalgal growth was further evaluated using the AGREE metric based on the principles of Green Analytical Chemistry. The estimated AGREE score of approximately 0.76 indicates a moderately green analytical procedure. The results highlight the importance of temperature control in maintaining stable microalgal cultivation and demonstrate the potential of integrating environmental performance assessment into microalgal growth studies.
Mn2+ Assisted Catalytic Hydrolysis of Water Hyacinth Cellulose under Mild Conditions Prasetya Saputri, Wulandari; Suci Wadini Santoso, Ruth; Trisna Anggraini, Winda; Iman Prakoso, Nurcahyo; Utami, Maisari; Yanus Sasongko, Setyo; Purwiandono, Gani
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 7, ISSUE 2, October 2026
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/EKSAKTA.vol7.iss2.art1

Abstract

Cellulose isolated from water hyacinth was hydrolyzed using organic and biomimetic acid catalysts under controlled thermal and solvent conditions. Piperazine dihydrogen sulfate showed higher hydrolysis efficiency compared to glutamic and maleic acids. The presence of Mn2+ further enhanced depolymerization, increasing cellulose conversion from 35.35% to 41.40% in aqueous medium and up to 49.48% in a water-acetonitrile system at 85°C. Despite increased depolymerization, glucose yield remained below 16%, with a maximum value of 15.26% obtained in the Mn2+-assisted aqueous system. The discrepancy between overall hydrolysis and glucose formation indicates the presence of soluble intermediates or secondary transformation during heating. The reaction pathway is consistent with proton-assisted glycosidic bond cleavage enhanced by metal coordination. Greenness assessment using the AGREE metric yielded an overall score of 0.56, indicating moderate environmental performance primarily limited by batch configuration and energy demand.
KKN-PPM PENGOLAHAN LIMBAH KELAPA DI WATUDUWUR, BRUNO, KABUPATEN PURWOREJO Allwar, Allwar; Prakoso, Nurcahyo Iman; Laksono, Soni
Asian Journal of Innovation and Entrepreneurship Volume 03, Issue 03, September 2018
Publisher : UII

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

Abstract

Sabut kelapa pada umumnya hanya dimanfaatkan untuk keperluan bahan bakar bagi rumah tangga yang masih menggunakan kayu bakar. Di daerah penghasil kelapa, sabut kelapa sering dibuang begitu saja tanpa diolah kembali untuk mendapatkan hasil yang lebih bermanfaat. Melimpahnya limbah kelapa dari desa-desa di sekitar yang memliki perkebunan kelapa dapat diangkat sebagai potensi desa dalam meningkatkan perekonomian desa dengan memanfaatkan limbah lokal menjadi kebutuhan rumah tangga bernilai lebih.Desa Watuduwur, Bruno Purworejo adalah daerah penampung limbah kelapa, tepatnya di Dusun Ketepeng. Hanya saja kurangnya keterampilan dan peralatan yang menunjang menjadi kendala warga dalam pemanfaatan potensi yang ada. Selama ini warga hanya memanfaatkannya sebagai bahan bakar. Program pemberdayaan masyarakat ini memiliki tujuan untuk meningkatkan kesejahteraan masyarakat. Pelaksanaan ini dirancang menggunakan metode pelatihan dengan sistem penyampaian materi secara teori atau sosialisasi dan praktik atas pembelajaran yang telah dilakukan. Perencanaan tersebut seperti pelatihan pengolahan limbah, pelatihan menjahit sarung co-pillow dan matras, sosialisasi tentang pasar dan pemasaran, serta bagaimana pemanfaatan media sosial sebagai media pemasaranPengembangan Sumber Daya Manusia (SDM) dan alat produksi memberikan peluang yang baik untuk membangun industri rumah tangga. Hal ini perlu adanya dukungan dari beberapa pihak dan dapat melalui beberapa sistem. Salah satunya adalah bermitra dengan perguruan tinggi melalui program pemberdayaan masyarakat. Adanya program pendampingan dalam pemberdayaan masyarakat diharapkan bisa lebih berperan aktif dalam menjalankan serta mengembangkan perekonomian yang ada di Desa Watuduwur dengan memanfaatkan hasil pertanian lokal. Selain itu masyarakat Desa Watuduwur mampu mandiri mengembangkan usahanya hingga menjadi desa pemroduksi co-pillow dan matras yang dikenal oleh masyarakat luas dengan menjadi tujuan lokasi oleh-oleh saat berwisata ke Purworejo, tepatnya Bruno  
Co-Authors Alifia Tia , Aulia Allwar Allwar Anggraini, Winda Trisna Gani Purwiandono, Gani Laksono, Soni Lukman Hakim Nuri Hidayati Prasetya Saputri, Wulandari Ria Diar Stya, Primastiti Santoso, Ruth Suci Wadini Saputri, Wulandari Prasetya Sasongko, Setyo Yanus Suci Wadini Santoso, Ruth Trisna Anggraini, Winda Utami, Maisari Yanus Sasongko, Setyo