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All Journal Buletin Peternakan Jurnal Sains dan Teknologi Peternakan Warta Perkaretan Journal of Biobased Chemicals (JOBC) Sewagati
Rahmawati, Atiqa
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Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Engineering Materials Science & Nanotechnology Social Sciences Veterinary Other

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Pelatihan Penyamakan Kulit Kelinci Berbulu kepada Peternak di Terminal Kelinci Bantul Rahmawati, Atiqa; Ajie, Baskoro; Robbika, Fadzkurisma; Wibowo, R. Lukas Martindro Satrio Ari; Yuliatmo, Ragil; Abdullah, Sofwan Siddiq; Ukhdiyati, Mustafidah
Sewagati Vol 8 No 2 (2024)
Publisher : Pusat Publikasi ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j26139960.v8i2.849

Abstract

Kulit kelinci merupakan salah satu limbah yag dihasilkan dari peternakan kelinci. Pada umumnya kulit kelinci dimanfaatkan untuk pakan ternak, dan kulit yang sudah hampir membusuk dibuang ke badan air. Pemanfaatan kulit kelinci dapat dilakukan dengan menyamak kulit baik dengan bulu atau tanpa bulu. Pemanfaatan kulit kelinci dengan metode penyamakan dapat meningkatkan nilai jual kulit kelinci. Tujuan kegiatan pengabdian masyarakat yaitu untuk memberikan pengetahuan kepada peternak kelinci dalam memanfaatkan kulit kelinci sehingga menghasilkan produk yang memiliki nilai jual yang lebih tinggi dibandingkan kulit kelinci mentah. Metode kegiatan pengabdian masyarakat yaitu dimulai dengan observasi masalah, melakukan FGD dengan stakeholder, perumusan solusi dengan tim pengabdian, persiapan alat dan bahan, pelaksanaan kegiatan, dan pelaporan kegiatan. Kegiatan pengabdian yaitu penyamakan kulit kelinci beserta bulunya dengan menggunakan bahan penyamak kromium dan aldehid. Hasil kegiatan program pengabdian yaitu kulit kelinci samak bulu yang dengan suhu kerut 85oC, mempunyai pegangan lemas dan bulu tidak mudah rontok. Sedangkan hasil evaluasi instruktur mempunyai rata-rata keseluruhan dari tiap aspek sebesar 83,8 (skala 0-100) dan evaluasi kegiatan mempunyai rata-rata keseluruhan dari tiap aspek sebesar 4,34 (skala 0-5). Kegiatan pengabdian diharapkan dapat memberikan pengetahuan bagi peternak kelinci sehingga dapat memanfaatkan kulit kelinci menjadi produk yang lebih mempunyai nilai ekonomi yang lebih tinggi.
Pelatihan Refinishing Kulit Kaku dan Kulit Berjamur di Kelompok Pengrajin Kulit Setyo Rukun, Manding, Kabupaten Bantul, Daerah Istimewa Yogyakarta Rahmawati, Atiqa; Adetya, Nais Pinta; Robbika, Fadzkurisma; Putri, Naimah; Wulandari, Dwi; Abdullah, Sofwan Siddiq; Susanto, Heru Budi; Nurwantoro; Asfan, Muhammad; Lubis, Dina Mariana Uli
Sewagati Vol 8 No 5 (2024): Preprinted
Publisher : Pusat Publikasi ITS

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Abstract

Pandemi Covid-19 memiliki dampak terhadap berbagai sektor termasuk industri kulit. Kulit tersamak yang telah melalui proses finishing, seringkali mengalami penurunan kualitas akibat penyimpanan yang tidak standar. Kulit samak sebelum digunakan sebagai bahan produk kulit disimpan dalam ruang penyimpanan atau gudang dalam jangka waktu yang lama. Semakin lama kulit tersebut akan menumpuk, ditumbuhi jamur, dan timbul bau yang tidak sedap. Hal ini menimbulkan defek dan menyebabkan turunnya kualitas kulit. Oleh karena itu, pengabdian masyarakat ini diadakan untuk memberikan pengetahuan dan pelatihan tentang perawatan dan penyimpanan kulit dan produk kulit di Kelompok Pengrajin Kulit Setyo Rukun Manding. Metode kegiatan pengabdian masyarakat dimulai dengan observasi masalah, melakukan FGD dengan stakeholder, perumusan solusi dengan tim, persiapan alat dan bahan, pelaksanaan kegiatan, serta pelaporan kegiatan. Kegiatan pengabdian berupa pelatihan dan pendampingan dibagi menjadi beberapa porsi kegiatan, yaitu 60% praktek perbaikan kulit berjamur dan kulit kaku, 20% penyampaian teori, 10% diskusi dan 10% evaluasi. Evaluasi dilakukan dengan melihat hasil perbaikan kulit berjamur dan kulit kaku. Hasil kegiatan pengabdian yaitu didapatkan formulasi untuk mengatasi kulit kaku maupun kulit berjamur di Sentra Kulit Setyo Rukun, Manding. Hasil evaluasi kulit kaku yaitu dengan pengujian kelemasan kulit. Kelemasan kulit meningkat sebesar 0,6 mm dari kulit awal. Sedangkan hasil evaluasi kulit berjamaur yaitu tidak tumbuh jamur pada kulit setelah diinkubasi selama 48 jam.
PENGARUH PAPARAN MICROWAVE TERHADAP DERAJAT IKATAN SILANG PADA VULKANISASI KARET STIRENA BUTADIENA Saputra, Andri; Rahmawati, Atiqa; Arifin, Uma Fadzilia; Agustian, Mertza Fitra
Warta Perkaretan Vol. 43 No. 1 (2024): Volume 43, Nomor 1, Tahun 2024
Publisher : Pusat Penelitian Karet - PT. Riset Perkebunan Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/ppk.wp.v43i1.978

Abstract

Vulkanisasi karet diperlukan untuk meningkatkan sifat kekuatan dan elastisitas suatu produk karet. Selain mempersingkat waktu proses, kelebihan vulkanisasi menggunakan radiasi elektromagnetik dari microwave adalah panas yang seragam yang tidak tergantung pada ketebalan produk. Penelitian ini bertujuan mengetahui karakteristik vulkanisasi karet stirena butadiena pada berbagai waktu paparan radiasi microwave. Kompon karet stirena butadiena dimasukkan dalam microwave dan diberi paparan radiasi elektromagnetik menggunakan daya 5 W pada berbagai waktu (10, 30, 50, 60, dan 70 menit). Derajat ikatan silang vulkanisat diuji menggunakan metode Flory-Rehner. Hasil penelitian diketahui bahwa tahap induksi vulkanisasi karet stirena butadiena pada daya 100 W membutuhkan durasi paparan yang lama sekitar 50 menit dengan derajat ikatan silang sebesar 0,52x10-8 mol/cm3. Tren hasil menunjukkan bahwa lama paparan radiasi berbanding lurus dengan nilai derajat ikatan silang karet stirena butadiene. Derajat ikatan silang karet stirena butadiene pada waktu 50, 60, dan 70 menit secara berurutan adalah 0,52x10-8 mol/cm3, 4,65x10-8 mol/cm3, dan 29,41x10-8 mol/cm3. Paparan radiasi elektromagnetik dari microwave di atas menit ke-70 diperkirakan masih dapat menyebabkan terbentuknya ikatan silang antar karet stirena butadiene hingga titik maksimum pada menit tertentu.
Comparison of Pegagan (Centella asiatica (L.)) Extraction with Ultrasound-Assisted Extraction and Microwave-Assisted Extraction Methods Using Response Surface Methodology Rahmawati, Ayu Ulum; Rahmawati, Atiqa
Journal of Biobased Chemicals Vol. 2 No. 1 (2022): Journal of Biobased Chemicals
Publisher : Program Studi Teknik Kimia Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (590.032 KB) | DOI: 10.19184/jobc.v2i1.117

Abstract

Pegagan (Centella asiatica (L.)) is one of the herbaceous plants that grow, and flowers throughout the year. Pegagan has been used for hundreds of years, especially in the dermatology, and cosmetology industries. Pegagan (Centella asiatica (L.)) has distinctive bioactive components, namely triterpene ester glycoside compounds in the form of asiaticoside, and madecoside as well as triterpene group compounds in the form of asiatic acid, and madecasic acid. There are various extraction methods to produce the following compounds namely, conventional extraction methods, and modern extraction methods. The two methods have differences in the results obtained. Therefore, the difference in the extraction method will determine the result of the difference in the levels of a compound. So that this research was carried out on the effect of Pegagan (Centella asiatica (L.)) extraction using a comparison of the Microwave-Assisted Extraction (MAE), and Ultrasound-Assisted Extraction (UAE) methods on the total phenol content in the Pegagan (Centella asiatica (L.)) extracted. Analysis of the extracteded bioactive content was carried out by analyzing the total phenol content using the Folin-Ciocalteau reagent method and analyzing the data through the Analysis of Response Surface Design expert 11 to see the significance of the research variables. The results obtained from the study are in the form of a comparison of the optimal conditions for the total phenol content, namely, the comparison between the UAE, and MAE methods for Centella asiatica (L.). extracted with ethanol solvent which is more optimal by using the MAE method because in a short time it can produce 1130.7882 mg.
Optimization of Extraction of Bioactive Compound from Pegagan Leaves Using Ethanol Solvent With Microwave-Assisted Extraction Method (MAE) Rohmah, Fira Ulvatur; Rahmawati, Atiqa; Rizkiana, Meta Fitri; Susanti, Ari
Journal of Biobased Chemicals Vol. 2 No. 1 (2022): Journal of Biobased Chemicals
Publisher : Program Studi Teknik Kimia Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (514.436 KB) | DOI: 10.19184/jobc.v2i1.119

Abstract

Treatment using natural ingredients in Indonesia is the main choice that is growing in society. This is because treatment with natural ingredients has relatively milder side effects compared to synthetic treatment. Therefore, further research is needed on natural ingredients that can be used as natural medicines, one of which is pegagan (Centella asiatica (L.)). Several studies have found bioactive compounds in pegagan that can be used as medicine by various methods. The author wants to know the optimal conditions for extracting pegagan bioactive compounds using the microwave-assisted extraction (MAE) method. This study used pegagan leaf size 40 mesh that had been dried. pegagan leaves were extracted using ethanol as a solvent with microwave power, solvent concentration, and extraction time as variables. Variable power 150 watts, 300 watts, and 450 watts. Variable solvent concentration 25%, 50%, and 75%. Variable extraction time for 5, 10, and 15 minutes. Analysis of the results of the study was carried out using total phenol analysis using the Folin-Ciocalten method. The research data obtained optimum operating conditions at 75% solvent concentration, 450-watt microwave power, and extraction time of 10 minutes with a total phenol content of 1251.410225 mg AGE/g sample.
Influence of Retanning Agents on Physical Characteristics of Snow-White Glove Leather from Goat Skin Yuliatmo, Ragil; Maryati, Tutik; Rahmawati, Atiqa; Adamu, Dahiru J M; Mizan, Al
Buletin Peternakan Vol 48, No 2 (2024): BULETIN PETERNAKAN VOL. 48 (2) MAY 2024
Publisher : Faculty of Animal Science, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21059/buletinpeternak.v48i2.95274

Abstract

The quality of leather is subject to various elements, such as the specific raw material used, and the processing techniques implemented throughout the production process. Goatskin, renowned for its exceptional softness and durability, is frequently employed in the production of gloves owing to its desired attributes, notably its capacity to produce snow-white gloves. Retanning is an essential step in the leather manufacturing process as it significantly improves the characteristics of the leather. Through an investigation into the impacts of distinct retanning agents on goatskin leather gloves, this research endeavor seeks to offer significant knowledge regarding the most effective retanning procedures that can augment the tactile attributes of snow- white leather gloves. In this study, formaldehyde, alum, chromium, and chromium alum were employed as retanning agents. The retanned leathers were assessed by physical parameters, Principal Component Analysis (PCA), and Fourier Transform Infrared spectroscopy (FTIR), then compared to a commercially available snow-white leather glove. The physical characteristics of chrome alum retanned leather showed a high degree of softness (6.60±0.02 mm), good tear strength (1.530±117 N/cm), and tensile strength (1.500±100 N/cm 2 ). The principal component analysis (PCA) also supported that the properties of chrome alum retanned snow-white glove leather closely resemble commercial leather and the result from this study suggested that all factors notably impact the skin's physical quality, except for thickness. Additionally, the FTIR analysis reveals similar functional groups from the different retanned leathers indicated by comparable peaks and stretching patterns. Therefore, chrome-alum could be a well alternative retanning agent for the production of snow-white glove leather.
Study of Histological Skin Structure of Python reticulatus and Varanus salvator Putri, Naimah; Wibowo, Raden Lukas Martindro Satrio Ari; Rahmawati, Atiqa; Jonathan, Sebastian; Tarigan, Deo Steven Barney
Jurnal Sains dan Teknologi Peternakan Vol 5 No 2 (2024): Jurnal Sains dan Teknologi Peternakan
Publisher : Universitas Sulawesi Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31605/jstp.v5i2.3814

Abstract

Reptile skin is covered with scales that form a protective barrier, making it waterproof and enabling life on land. The present study investigated the histological structure of the skin of the Python reticulatus and Varanus salvator. The samples used were Python reticulatus and Varanus salvator skin taken from the dorsal region. Preparations were made using the hematoxylin eosin (HE) staining method which was carried out at the Microbiology of the leather processing technology, Politeknik ATK Yogyakarta. The results showed that the histological structure of Python reticulatus skin consisted of two layers, epidermis and dermis. The epidermis was composed of stratum corneum, stratum granulosum, and stratum basale. The dermis consists of an outer layer called the stratum laxum (stratum spongiosum) and an inner layer called the stratum compactum. Meanwhile, the histological skin structure of Varanus salvator skin consists of epidermis which included oberhautchen, α-keratin layer, β-keratin layer, supra basale layer, and basale layer. The dermis consists of superficial dermis and deep dermis. There are differences between Python reticulatus skin that is distinguished by its ability to ecydis (skin shedding) the epidermis and Varanus salvator skin have osteoderm (OD) within their dermis layer
Co-Authors Abdullah, Sofwan Siddiq Adamu, Dahiru J M Adetya, Nais Pinta Agustian, Mertza Fitra Ajie, Baskoro Andri Saputra Ari Susanti Asfan, Muhammad Dwi Wulandari Heru Budi Susanto, Heru Budi Jonathan, Sebastian Lubis, Dina Mariana Uli Maryati, Tutik Meta Fitri Rizkiana Mizan, Al Nurwantoro Putri, Naimah R. Lukas Martindro Satrio Ari Wibowo, R. Lukas Martindro Satrio Ari Rahmawati, Ayu Ulum Robbika, Fadzkurisma Rohmah, Fira Ulvatur Tarigan, Deo Steven Barney Ukhdiyati, Mustafidah Uma Fadzilia Arifin, Uma Fadzilia Wibowo, Raden Lukas Martindro Satrio Ari Yuliatmo, Ragil