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All Journal Buletin Peternakan IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) JMM (Jurnal Masyarakat Mandiri) TIN: TERAPAN INFORMATIKA NUSANTARA Jurnal Sains dan Teknologi Peternakan Warta Perkaretan Journal of Biobased Chemicals (JOBC) Sewagati Jurnal Agripet

Rahmawati, Atiqa

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Author-ID : 1497084

Aerospace Engineering 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 Decision Sciences, Operations Research & Management Dentistry Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Neuroscience Nursing Physics Public Health 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

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.

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

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

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

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.

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

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

Pengembangan Intelligent Leather Inspection Method Berbasis Interpretable Artificial Intelligence Frannita, Eka Legya; Wulandari, Dwi; Putri, Naimah; Rahmawati, Atiqa; Prananda, Alifia Revan
TIN: Terapan Informatika Nusantara Vol 6 No 2 (2025): July 2025
Publisher : Forum Kerjasama Pendidikan Tinggi (FKPT)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47065/tin.v6i2.7425

The Industry 4.0 revolution, characterized by the widespread adoption of artificial intelligence and automation, has fundamentally transformed quality inspection processes in manufacturing sectors. Nevertheless, the leather tanning industry continues to rely on conventional visual inspection methods conducted by human operators, which are inherently susceptible to subjectivity, inter-operator variability, and inconsistent outcomes. This study proposes an integrated deep learning framework utilizing the NasNet-Large architecture combined with Local Interpretable Model-Agnostic Explanations (LIME) to automate objective defect detection and quality classification of pickled leather. The research employs a digital image dataset comprising four distinct leather grade categories, each annotated with expert-validated ground truth labels and professional interpretations. Experimental results demonstrate consistent model performance with 75% accuracy in both training and validation phases while achieving improved testing accuracy of 79%. LIME-based interpretability analysis reveals significant spatial convergence between model-identified defect regions and expert-annotated ground truth references. These findings indicate that the developed model exhibits remarkable competence in replicating professional leather quality inspection capabilities. The proposed approach not only enhances inspection efficiency by reducing human-dependent errors but also provides transparent decision-making interpretability - a critical requirement for reliable AI implementation in industrial applications. This research contributes to the advancement of explainable AI systems in material quality assessment, offering methodological innovation and practical implementation value for the leather manufacturing sector.

PELATIHAN PEMANFAATAN LIMBAH FLESHING UNTUK PAKAN MAGGOT BLACK SOLDIER FLY Rahmawati, Atiqa; Ajie, Baskoro; Rabbika, Fadzkurisma; Rachmawati, Laili; Anggriyani, Emiliana; Rosiati, Nur Mutia; Adetya, Nais Pinta; Yuliatmo, Ragil; Juhana, Swatika; Udkhiyati, Mustafidah
JMM (Jurnal Masyarakat Mandiri) Vol 9, No 2 (2025): April
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jmm.v9i2.29235

Abstrak: Permasalahan limbah padat fleshing dari industri penyamakan kulit menjadi hal yang perlu diperhatikan. Limbah fleshing umumnya hanya ditimbun di lahan atau dibakar yang dapat mencemari lingkungan. Tujuan dari pengabdian masyarakat ini yaitu terwujudnya pemanfaatan limbah fleshing sebagai pakan maggot dan meningkatkan nilai tambah limbah penyamakan kulit pada karyawan perusahaan penyamakan kulit di Yogyakarta dan untuk meningkatkan softskill dan hardskill peserta dalam budidaya maggot. Pelaksanaan kegiatan dilakukan di Kampus 1 Politeknik ATK Yogyakarta. Pelaksanaan kegiatan ini dibagi menjadi 3 tahap: (1) persiapan dan survei, (2) penyuluhan materi dan praktik budidaya maggot dari limbah fleshing, dan (3) evaluasi kegiatan diklat. Pelatihan dalam bentuk praktik budidaya maggot terdiri dari tiga tahap yaitu penetasan telur maggot, pembiakan telur maggot, dan pemanenan maggot setelah 9-14 hariPeserta merupakan karyawan perusahaan kulit di Yogyakarta yang terdiri dari 15 pesertaTingkat pemahaman peserta terhadap materi dikategorikan baik, dengan peningkatan nilai rata-rata pretest dari (78) menjadi posttest (86). Instruktur telah memenuhi kriteria dalam ketepatan waktu, kehadiran setiap proses dan mampu menyampaikan materi dengan baik dengan nilai rata-rata 4,7 (sangat baik). Penilaian seluruh aspek kegiatan yang meliputi tema atau materi diklat, metode diklat, fasilitas, dan penyelenggaraan diklat menunjukkan nilai rata-rata 4,68 (sangat baik).Abstract: The problem of fleshing solid waste from the leather tanning industry is something that needs attention. Fleshing waste is generally only dumped on land or burned, which can pollute the environment. The aim of this community service is to realize the use of fleshing waste as maggot feed and increase the added value of tanning waste for employees of tanning companies in Yogyakarta and to improve the soft skills and hard skills of participants in maggot cultivation. The activities were carried out at Campus 1 of ATK Yogyakarta Polytechnic. The implementation of this activity is divided into 3 stages: (1) preparation and survey, (2) counseling on materials and practices for cultivating maggots from fleshing waste, dan (3) evaluation of training activities. Counseling in the form of maggot cultivation practices consists of three stages, namely hatching maggot eggs, cultivating maggot eggs, and harvesting maggots after 9-14 days. Participants are employees of a leather company in Yogyakarta consisting of 15 participants. The level of participants' understanding of the material is categorized as good, with an increase in the average pre-test score from (78) to post-test (86). The instructor has met the criteria for punctuality, attendance at each process and is able to deliver the material well with an average score of 4.7 (very good). Assessment of all aspects of activities including training themes or materials, training methods, facilities and training implementation showed an average score of 4.68 (very good).

Histological and Chemical Studies of Goat Skin Transformation Processing of Raw Skin into Tanned Leather Rahmawati, Atiqa; Putri, Naimah; Wibowo, Ari
Jurnal Agripet Vol 25, No 1 (2025): Volume 25, No. 1, April 2025
Publisher : Faculty of Agriculture

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17969/agripet.v25i1.43456

Fresh goat skin and skins tanned with different tanning agents were prepared for histological, chemical, and physical analyses. Fresh skin samples were fixed in 10% formalin solution, processed using the paraffin embedding technique, sectioned, and stained with hematoxylin and eosin to determine the histological structure. Samples of goat tanned skin, treated with various tanning agents (chrome, aldehyde, chamois, and vegetable), underwent chemical analysis using Fourier Transform Infrared Spectroscopy (FTIR) followed by physical analyses, including tensile strength, tear strength, thickness, and shrinkage temperature. The results showed that the histological structure of fresh skin consisted of two layers: the epidermis and dermis, while tanned leather only exhibited the dermis layer. The epidermis was removed during the tanning process. FTIR analysis of chrome-tanned leather showed bands at 1633 cm1 (amide I), 1554 cm1 (amide II), and 1240 cm1 (amide III). Aldehyde-tanned leather showed bands at 1651 cm1, 1550 cm1, and 1271 cm1 (amide I, II, and III), while vegetable-tanned leather displayed bands at 1634 cm1 (amide I), 1552 cm1 (amide II), and 1239 cm1 (amide III). Shifts in peak positions, intensity, and the number of signature peaks were observed across the tanning agents (chrome, aldehyde, oil, and vegetable). The use of different tanning agentswet blue, wet white, vegetable-tanned, and chamoisresulted in distinct grain-surface structures, significantly influencing the physical characteristics of the leather.

Effects of Crosslinker and Silicon to Enhance Taber Abrasion and Physical Properties of Finished Leather for Upholstery Furniture Rahmawati, Atiqa; Nurbalia, Elis; Tiyastuti, Rini
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 10, No 2 (2025): June 2025
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v10.i2.79

Finishing is one of the stages in leather processing. The addition of silicone and crosslinker in the top coat of the finishing stage of leather upholstery furniture is used to increase abrasion resistance, which is a critical factor in determining the life and quality of leather furniture. The aim of this study was to determine the influence of silicone and crosslinker additions on the abrasion resistance and physical properties of leather upholstery furniture. The leather material used is dyed crust leather with a thickness of 1.2-1.4 mm with an area of 1.5 sqft. The addition of crosslinker and silicone is applied only to the top coat. The analyses performed include physical skin analysis (adhesion test, rubbing fastness, glossy test, and flexing) and organoleptic tests (abrasion and smoothness tests). The addition of crosslinker and silicone can affect the physical and organoleptic quality of leather. The addition of crosslinker and silicone to the top coat showed the best results on upholstery leather sample D (3% crosslinker and 4% silicone).The results of statistical tests using the multinomial logistic regression method in organoleptic testing and ANOVA in physical testing showed that only crosslinker had a significant effect on the response.

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

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.

Co-Authors Abdullah, Sofwan Siddiq Adamu, Dahiru J M Adetya, Nais Pinta Agustian, Mertza Fitra Ajie, Baskoro Alifia Revan Prananda Ari Susanti Ari Wibowo Asfan, Muhammad Dwi Wulandari Eka Legya Frannita Emiliana Anggriyani Heru Budi Susanto, Heru Budi Jonathan, Sebastian Juhana, Swatika Laili Rachmawati Lubis, Dina Mariana Uli Maryati, Tutik Meta Fitri Rizkiana Mizan, Al Mustafidah Udkhiyati Nurbalia, Elis Nurwantoro Putri, Naimah R. Lukas Martindro Satrio Ari Wibowo, R. Lukas Martindro Satrio Ari Rabbika, Fadzkurisma Rahmawati, Ayu Ulum Robbika, Fadzkurisma Rohmah, Fira Ulvatur Rosiati, Nur Mutia RR. Ella Evrita Hestiandari Tarigan, Deo Steven Barney Tiyastuti, Rini Ukhdiyati, Mustafidah Uma Fadzilia Arifin, Uma Fadzilia Wibowo, Raden Lukas Martindro Satrio Ari Yuliatmo, Ragil

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