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All Journal Indonesian Journal of Chemistry Biosaintifika: Journal of Biology & Biology Education Depik Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan
Muchammad Yunus
Departemen Parasitologi Veteriner, Fakultas Kedokteran Hewan, Universitas Airlangga
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Engineering

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On the Mechanical and Thermal Properties of Poly(Vinyl Alcohol) – Alginate Composite Yarn Reinforced with Nanocellulose from Oil Palm Empty Fruit Bunches Ainul Maghfirah; Farah Fahma; Nurmalisa Lisdayana; Muchammad Yunus; Ahmad Kusumaatmaja; Grandprix Thomryes Marth Kadja
Indonesian Journal of Chemistry Vol 22, No 1 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.67881

Abstract

PVA-alginate hydrogel is a promising material for use in biomedical applications due to its desirable characteristics: biocompatible, durable, non-toxic, and low cost. However, the low gel strength of this composite limits its use in biomedical applications. This study aims to develop enhanced mechanical and thermal properties of poly(vinyl alcohol) PVA-alginate composite yarn by adding nanocellulose isolated from the sustainable oil palm empty fruit bunches (OPEFBs). The PVA-alginate composite yarns reinforced with nanocellulose were prepared with various nanocellulose contents (1 wt.%, 2 wt.%, and 5 wt.%). The composite's tensile strength exhibited an increasing trend with the addition of nanocellulose, while the elongation at break showed the opposite trend. Moreover, it was demonstrated that the composite's thermal degradation shifts to higher temperatures with the addition of nanocellulose. The observed activation energies for the thermal degradation calculated using the Coats-Redfern method exhibited a significant increment for the composites reinforced with nanocellulose. These results show that the addition of nanocellulose into the PVA-alginate matrix enhances the chemical and thermal properties of the resulting hydrogel. All these improvements have resulted from more abundant and robust hydrogen bonds generated by the nanocellulose presence.
Study on the Morphology of Fasciola gigantica and Economic Losses due to Fasciolosis in Berau, East Kalimantan Muhammad Rofi' Prasetya; Setiawan Koesdarto; Nunuk Dyah Retno Lastuti; Lucia Tri Suwanti; Kusnoto Kusnoto; Muchammad Yunus
Biosaintifika: Journal of Biology & Biology Education Vol 11, No 1 (2019): April 2019
Publisher : Department of Biology, Faculty of Mathematics and Sciences, Semarang State University . Ro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/biosaintifika.v11i1.18201

Abstract

Fasciolosis is one of the endemic parasitic diseases in Indonesia and causes significant economic losses. Fasciola gigantica is the main species found to infect livestock. This research aimed to describe the morphology of F. gigantica histologically using hematoxylin and eosin staining as well as ultrastructure morphology using scanning electron microscopy (SEM). Besides, the study was also carried out to determine the prevalence and estimation of economic losses due to fasciolosis in Berau Regency. The histological identification of flukes morphology found several organs including oral sucker (OS), ventral sucker (VS), cirrus (C), genital pore (GP), uterus (U), ovary (O), tegument (Te), testis (T), and caecum (C). In this study, ultrastructure morphology was divided into anterior and midbody region. In the anterior region, there are an oral sucker (OS) with a diameter of 304.5 µm and a ventral sucker (VS) with a diameter of 571 µm. It was also found the anterior spine with a width of 25.4 µm and a height of 22.8 µm. In the midbody, the spine has a width of ± 26.7 µm and a length of ± 38.9 µm leading posteriorly. Postmortem examination results showed that the prevalence of fasciolosis in Berau regency was 21.65% or 34 of 157 cows which were positive with an estimated loss of 228,656,475.00 IDR/16,450 USD (1 USD=13,900 IDR). The amount of loss due to fasciolosis must be a particular concern in carrying out control and prevention measures. Histology and ultrastructure morphology can become a reference in the development of anthelmintic testing that has been used so far in Indonesia.
Comparative appendicular osteology of Tor spp. (Cyprinidae) in Indonesia Yusrizal Akmal; Muchammad Yunus; Hani Plumeriastuti; Yeni Dhamayanti; Irfannur Irfannur; Arief Hidayat Zulkifli; Muliari Muliari; Agung Setia Batubara
Depik Vol 13, No 1 (2024): APRIL 2024
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.13.1.28247

Abstract

Tor tambroides, T. tambra, T. douronensis, and T. soro are native fish species to Indonesia with their natural habitat generally being upstream of rivers in hilly areas with clear water and strong currents. Information of the structure and function of appendicular osteology is necessary to understand how fish accelerate and maintain body balance in the water. This study used 5 samples per fish species obtained from Tor fishermen around the habitat of these fish. The results of the comparison showed morphological differences between the appendicular structure of Tor species, consisting structure of the pinnae pectoralis, pinnae pelvicalis, pinnae dorsalis, pinnae analis, and pinnae caudalis. The highest variation was found in the pinnae caudalis. The pointed shape of the pinnae caudalis with long fin rays indicates that the Tor species is capable to swim at a high speeds.Keywords:ossa appendiculareTor douronensisTor tambraTor tambroidesTor soro
Co-Authors Agung Setia Batubara Agung Setia Batubara Ahmad Kusumaatmaja Ahmad Kusumaatmaja Ainul Maghfirah Arief Hidayat Zulkifli FARAH FAHMA Farah Rahma Hani Plumeriastuti Hani Plumeriastuti Ilham Zulfahmi Irfannur Irfannur Irfannur Kadja, Grandprix Thomryes Marth Kusnoto Kusnoto Kuwat Triyana Lucia Tri Suwanti, Lucia Tri Muhamad Nasrudin Manaf Muhammad Rofi' Prasetya Muhammad Rofi' Prasetya Muliari Muliari Muliari Nunuk Dyah Retno Lastuti Nunuk Dyah Retno Lastuti Nurmalisa Lisdayana Setiawan Koesdarto Shiddiq Nur Hidayat Yeni Dhamayanti Yusrizal Akmal Zhaza Afililla