Article Per Year (5 Year)
p-Index From 2020 - 2025
1.686
P-Index
This Author published in this journals
All Journal Jurnal Ilmu dan Teknologi Kelautan Tropis JOURNAL OF COASTAL DEVELOPMENT ILMU KELAUTAN: Indonesian Journal of Marine Sciences Management of Aquatic Resources Journal (Maquares) Journal of Marine Research Jurnal Kelautan : Indonesian Journal of Marine Science and Technology Jurnal Kelautan Tropis Aquacultura Indonesiana
Ali Djunaedi
Department Of Marine Sciences, Faculty Of Fisheries And Marine Sciences, Diponegoro University, Semarang
Biochemistry, Genetics & Molecular Biology Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Library & Information Science

Published : 43 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 43 Documents
Search

 1   2   3   4   5 
Free Radicals Scavenging Activities of Low Molecular Weight Sodium Alginate (LMWSA) from Sargassum polycystum, Produced by Thermal Treatment Yudiati, Ervia; Pringgenies, Delianis; Djunaedi, Ali; Arifin, Zaenal; Sudaryono, Agung
Aquacultura Indonesiana Vol 19, No 1 (2018)
Publisher : Indonesian Aquaculture Society (MAI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (620.849 KB) | DOI: 10.21534/ai.v19i1.121

Abstract

In this study, the effects of alginate from Sargassum polycystum molecular reduction by thermal heating on DPPH anti radical scavenging activity were investigated. Raw alginate as the control treatment was heated at 140oC in a laboratory oven for different time courses 1.5, 4.5, and 7.5 hours. The assessment of molecular weight, UV-visible and FT-IR spectroscopic studies were applied. By heat treatment, molecular weight of polymer was decreased in a time-dependent manner, though there is no significant difference between 4.5 h and 7.5 h samples. The UV-visible spectroscopic studies pointed that there was a new absorption band between 250 and 290 nm in alginate heated treatments. The higher antiradical scavenging activity were reached from 1.5 h and 4.5 h treatments (19.83% and 20.07%). Interestingly, the antiradical scavenging activity of the longest heating treatment (7.5 h) was reduced (16.85%), similar to the raw alginate (17.89%). Prolonged heat treatments influenced the antioxidant activity and reduced the ability of donate electrons or hydrogen atoms to inactivate this radical action.
HUBUNGAN ANTARA KANDUNGAN NITRAT DAN FOSFAT DENGAN KELIMPAHAN FITOPLANKTON DI PERAIRAN PULAU PARI, KEPULAUAN SERIBU Rizqina, Cahya; Sulardiono, Bambang; Djunaedi, Ali
Management of Aquatic Resources Journal (MAQUARES) Vol 6, No 1 (2017): MAQUARES
Publisher : Departemen Sumberdaya Akuatik,Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (717.67 KB)

Abstract

ABSTRAKKeberadaan fitoplankton dapat memberikan informasi mengenai kondisi suatu perairan, sedangkan nitrat dan fosfat mempengaruhi keberadaan fitoplankton untuk pertumbuhan dan transfer energi. Penelitian bertujuan untuk mengetahui jenis dan kelimpahan fitoplankton, mengetahui kandungan nitrat dan fosfat di perairan, serta hubungannya dengan kelimpahan fitoplankton dan mengetahui nilai indeks saprobitas perairan. Penelitian dilaksanakan pada bulan Mei – Juni 2016. Materi penelitian adalah sampel fitoplankton dan sampel air untuk uji nitrat dan fosfat. Metode pengambilan sampel secara purposive sampling. Sampling dilakukan sebanyak tiga kali pada 3 stasiun. Pengambilan sampel fitoplankton menggunakan jaring plankton dengan metode sampling aktif. Sampel fitoplankton diawetkan menggunakan lugol iodine 2-3 tetes sebelum diidentifikasi di laboratorium. Uji kandungan nitrat dan fosfat dilakukan dengan skala laboratorium. Analisa data dilakukan menggunakan Microsoft Excel 2013. Hasil penelitian menunjukkan kandungan nitrat di Pulau Pari berkisar antara 0,069 – 0,088 mg/l. Kandungan nitrat tergolong cukup optimal bagi pertumbuhan fitoplankton. Kandungan fosfat berkisar antara 0,004 – 0,006 mg/l. Kandungan fosfat tergolong rendah namun masih dapat ditolerir oleh fitoplankton. Kelimpahan fitoplankton berkisar antara 1774 – 3657 ind/l. Koefisien korelasi (r) sebesar 0,98 dan 0,905 artinya antara kandungan nitrat maupun fosfat dengan kelimpahan fitoplankton memiliki hubungan yang kuat. Nilai SI berkisar 1,28 – 1,43 dan nilai TSI berkisar 1,64 – 2,66 hal ini menunjukkan bahwa kualitas perairan Pulau Pari, dikategorikan dalam tingkat saprobitas oligosaprobik yaitu tercemar ringan sampai belum tercemar Kata kunci: Nitrat dan Fosfat, Kelimpahan Fitoplankton, Indeks Saprobitas, Pulau Pari, Kepulauan Seribu                                                                                           ABSTRACTThe existence of phytoplankton in the waters can provide information about water quality, while nitrates and phosphates affecting the availability of phytoplankton for growth and energy transfer. This research aims to know phytoplankton abundance and kinds of phytoplankton, find out the levels of nitrates and phosphates in the water and its connection with the abundance of phytoplankton, and find out saprobics index water. The research was conducted in May – June 2016. Material used in research was sample of phytoplankton and water samples. Methods used field survey with purposive technique sampling. The activity of sampling done in three times in 3 different stasions. Collection of phytoplankton sample using plankton net and active sampling method.  Phytoplankton samples preserved using 2-3 drops lugol's iodine before identified in the laboratory. Water samples to be tested it is nitrate and phosphate contents in laboratory scale. Data analysis research was done using Microsoft Excel 2013. This research shows the content of nitrate is about 0.069 to 0.088 mg/l. Nitrate content is optimal for growth of phytoplankton and phosphate is about 0.004 to 0.006 mg/l. Classified quite high but still can be tolerated by the phytoplankton. Phytoplankton abundance ranges from 1774 - 3657 ind/l. The correlation coefficient (r) between nitrate and phytoplankton abundance is 0,98 then between phosphate and phytoplankton abundance is 0,902. The result means both of them have a strong correlation. SI values from 1,28 to 1,43, and TSI value from 1,64 to 2,66 this show that water quality in Pari Island Thousand Island is categorized into oligosaprobic which is lightly polluted to uncontaminated.                                                                            Keywords: Nitrate and Phosphate, Phytoplankton abundance, Saprobic Index, Pari Island, Thousand Island  
KONDISI KUALITAS AIR KOLAM BUDIDAYA DENGAN PENGGUNAAN PROBIOTIK DAN TANPA PROBIOTIK TERHADAP PERTUMBUHAN IKAN LELE SANGKURIANG (Clarias sp) DI CIREBON, JAWA BARAT Pratama, Farizan Adiya; Afiati, Norma; Djunaedi, Ali
Management of Aquatic Resources Journal (MAQUARES) Volume 5, Nomor 1, Tahun 2016
Publisher : Departemen Sumberdaya Akuatik,Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (365.314 KB)

Abstract

Ikan lele sangkuriang termasuk dalam kelas Pisces dari filum Chordata yang tidak mempunyai sisik, berbentuk memanjang serta licin. Probiotik berasal dari bahasa Yunani pro dan bios yang berarti “untuk kehidupan”. Tujuan penelitian ini adalah untuk mengetahui perbedaan kualitas air dan pengaruh penggunaan probiotik terhadap ikan lele sangkuriang antara kolam yang menggunakan probiotik dan tanpa probiotik. Penelitian ini dilaksanakan pada bulan Juli 2015 di Desa Kertasura dengan Kelompok Tani Kersa Mulya Bakti dan Desa Dukuh dengan Kelompok Tani Mina Mulya Kecamatan Kapetakan Cirebon, Jawa Barat. Metode pengambilan sampel air pada setiap kolam penelitian bersifat metode stratifikasi, yaitu dengan menganggap bahwa perairan memiliki beberapa lapisan atau karakteristik berbeda yang terdiri dari 3 stasiun dengan 2 pengulangan untuk setiap stasiun. Selanjutnya dilakukan pengujian kualitas air meliputi uji oksigen terlarut, amoniak dan asam sulfida. Kemudian pengukuran pertumbuhan ikan lele dengan mengukur panjang dan berat ikan lele. Kolam probiotik memiliki kualitas air yang lebih baik yaitu konsentrasi awal amoniak 0,07 ppm, dengan konsentrasi akhir 0,04 ppm dan konsentrasi H2S awal 0,003 ppm, dengan konsentrasi akhir 0,002 ppm. Pada kolam tanpa probiotik memiliki konsentrasi awal amoniak 0,11 ppm, dengan konsentrasi akhir 0,08 ppm dan konsentrasi awal H2S 0,004 ppm, konsentrasi akhir 0,004 ppm. Pada kolam probiotik pertambahan panjang total ikan (L) 3,2 cm/2 minggu dan pertambahan berat total ikan (W) 16,3/2 minggu gr sedangkan pada kolam tanpa probiotik pertambahan panjang total ikan (L) 1,4 cm/2 minggu dan pertambahan berat total ikan (W) 11,6 gr/2 minggu. Kesimpulan dari penelitian ini adalah kualitas air kolam probiotik lebih baik dari kolam tanpa probiotik. Pengaruh penggunaan probiotik berdampak positif pada ikan lele ditinjau dari pertambahan panjang dan berat.The sangkuriang catfish belongs to class Pisces of the Chordata phylum. The fish has an elongated body without scales. The word probiotic comes from Greek words pro and bios, meaning “for life”. The objective of this study is to investigate the difference of water quality between probiotic pond and non-probiotic pond, and their effect on sangkuriang catfish. The research was conducted on July, 2015 at Kertasura Village with Tani Kersa Mulya Bakti Group and at Dukuh Village with Tani Mina Mulya Grup, Kapetakan District, Cirebon-West Java. The sampling method is the stratification method, which assumes that the waters have multiple layers or different characteristics. The samples were taken on 3 stations with 2 repetition for each station. Hereafter, the water quality analysis includes testing dissolved oxygen, ammonia and hydrogen sulfide, by catfish growth measured from it’s legth and weight. Probiotic pond has a better water quality with the initial ammonia concentration of 0.07 ppm and final ammonia concentration of 0.04 ppm. This pond also has an initial H2S concentration of 0.003 ppm and final H2S concentration of 0.002 ppm. In the non-probiotic pond, the initial ammonia concentration was 0.11 ppm, with final ammonia concentration of 0.08 ppm, and the initial H2S concentration of 0.004 ppm, with final H2S concentration of 0.004 ppm. Growth measured as the total length of fish in probiotic pond (L) was 3.2 cm/2 week and the total weight of fish (W) was 16.3 gr/2 week while on the non-probiotic pond, the total length of fish (L) was 1.4 cm/2 week and the total weight of fish (W) was 11.6 gr/2 week. Thus, the implementation of probiotic has a positive effect to the growth of catfish, as can be seen from the length and weight of the catfish during this study.
Pemberian Pelet dengan Ukuran Berbeda terhadap Pertumbuhan Kepiting Bakau (Scylla serrata Forsskål, 1775) Aditya, Bagus Pitra; Sunaryo, Sunaryo; Djunaedi, Ali
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (407.884 KB) | DOI: 10.14710/jmr.v1i1.2003

Abstract

Mud crab (S. serrata Forsskål, 1775) is one of the fisheries resources that has high economic value and potential to be cultivated. This study examines provision pellets of different sizes, adapted to the mangrove crab eating patterns. The purpose of this study is investigated the effect of different sizes pellets for the growth of mud crab (S. serrata Forsskål, 1775). This research was conducted at the Laboratory of Coastal Area Development (LPWP), UNDIP, Faculty of Fisheries and Marine Science, University of Diponegoro, Jepara, for 35 days, in October-November 2011. The research method in this study was used experimental laboratory with completely randomized design (CRD) with 3 treatments and 10 replications in each treatment, ie: treatment A (Ø pellets + 10 mm), treatment B (Ø pellets + 5 mm) and treatment C (Ø pellets + 1 mm). Initial weight of mud crab test is 50-55 g and have male gender. Growth of mud crab can be seen from the observation from SGR and supported by some other data, ie: the amount of feed intake, FCR, PER, the amount of energy consumption in feed and water quality parameters. These results indicate that administration of treatment different size pellets effect is very significant (p<0,01) on SGR, FCR, PER. SGR data suggest that on average in treatment A (5,42+0,64) reached the highest value, but not significantly different (p>0,05) with treatment B (5,17+0,52), where’s treatment C (4,02+0,51) reached the lowest value. FCR data show that, in treatment A (5,21+1,12) reached the lowest value, but not significantly different (p>0,05) with treatment B (5,42+1,15), while treatment C (7,16+1,55) reached the lowest value. PER data showed that, in treatment A (0,62+0,13) reached the highest value, but not significantly different (p>0,05) with treatment B (0,60+0,13), while treatment C (0,46+0,11) reached the lowest value.
Pemberian Enzim Papain pada Pakan Komersil Terhadap Pertumbuhan dan Efisiensi Pakan Ikan Kerapu Macan (Epinephelus fuscoguttatus) Fadli, Jauharul; Sunaryo, Sunaryo; Djunaedi, Ali
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (681.225 KB) | DOI: 10.14710/jmr.v2i3.3132

Abstract

Tiger grouper (E.fuscoguttatus) is one of the coral reef fishes, who has significant economical value. Relatively expensive value and highly demand of this species on the market prospective make a lot of fish has been developed by fishermen through aquaculture. This study aimed to determine the effect of the enzyme papain in commercial feed on the growth and feed efficiency of Tiger Grouper (E.fuscoguttatus). This study was conducted at the Center for Development of Brackish Water Aquaculture (BBPBAP) Jepara in June-August 2012. The method, that was used in this study was experimental with completely randomized design (CRD). This study used 4 treatments, each was replicated 3 times. Treatment was the use of enzyme papain in the commercial feed with a protein content of 46-48% as much as 3%in treatment A, 4% in treatment B, 5% in treatment C, and 0% as control in treatment D. The respon of treatment showed significant by different on growth. The and in grafik was reached by treatment C ( the used of enzyme papain 5% in the artificial feed), i.e : 3,24% day -1, and than followed by treatment B of 3,15% day -1, treatment A of 3,03 day -1, and treatment D as control of 2,92% day -1. The results were obtained in this study showed that the use of the enzyme papain in artificial diets with specific concentration had a positive by effect on growth and feed efficiency. Papain enzyme capable of hydrolyzing the protein in the feed is higher amino acid to be absorbed and utilized for growth.
Pengaruh Perbedaan Lama Perendaman dalam Larutan Pupuk Fosfat Terhadap Pertumbuhan Rumput Laut Gracilaria verrucosa (Hudson) Papenfuss Di Pertambakan Desa Wonorejo, Kaliwungu-Kendal Sari, Ayu Permana; Sunaryo, Sunaryo; Djunaedi, Ali
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (80.639 KB) | DOI: 10.14710/jmr.v1i2.2025

Abstract

Species G. verrucosa is naturally harvested, through harvesting and retrieval in nature. These activities led to excessive exploitation and dangerous continueties of seaweed population. There for it would require an effort to increase the production of G. verrucosa, including through aquaculture cultivation in area with good land management and proper use of fertilizer. One of the problems in the evironmental factors that affect production of G. verrucosa is limited nutrients. This problem can be solved by ensuring availability of nutrients. Added of inorganic elements for alternative to achieve an optimal level of production. The research design was Completely Randomized Design (CRD) with immersion time difference in G. verrucosa using SP 36 fertilizer. The immersion treatments were: A. control, B. 10 minutes, C. 20 minutes, D. 30 minutes, E. 40 minutes, F. 50 minutes, G. 60 minutes. This study used P (phospat) obtained from SP 36 fertilizer with concentration 0,2 g/L. Plantation was done by using a longline method of 72 ties and mantained for 35 days. The result show that the immersion period of G. verrucosa significantly effect (p<0,01), on the growth of G. verrucosa. This can be seen from the highest average specific growth rate of G. verrucosa in the treatment G (2,36 % per day) and the lowest average specific growth rate G. verrucosa in treatment A (1,14 % per day).
Uji Penggunaan Bacillus sp. sebagai Kandidat Probiotik Untuk Pemeliharaan Rajungan (Portunus sp.) Linggarjati, Kharisma Firdaus; Djunaedi, Ali; Subagiyo, Subagiyo
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (240.45 KB) | DOI: 10.14710/jmr.v2i1.2048

Abstract

Blue crab is one of the economically marine commodities and have high potential export. During this blue crab requirement derived from nature catches because in blue crab aquaculture not yet good branch out. To low survival rate of blue crab caused by bacterium vibrio disease, in addition to the content of nitrogen and phosphate can also affect the blue crab medium. This research as a purpose to test the effect of probiotic bacillus aplication to water quality and the total number of bacteria in the blue crab medium. the research was conducted with 2 stages, that is isolation and selection bacillus bacteria stages as probiotic and testing phase the effect of probiotic bacillus on water quality and the total number of bacteria. The result showed that probiotic bacillus with density 106 cfu/ml to reduce the content of ammonia (NH3), nitrite (NO2) and the total number of bacteria. While probiotics with density 105 cfu/ml to reduce the total number of bacteria in the blue crab medium, but have not been able to reduce the content of ammonia (NH3) and nitrite (NO2).
Metode Lepas Dasar dengan Net Bag pada Pertumbuhan Kappaphycus alvarezii (Doty) Wibowo, Ichsan Suryo; Santosa, Gunawan Widi; Djunaedi, Ali
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (768.738 KB) | DOI: 10.14710/jmr.v9i1.25783

Abstract

ABSTRAK: Parameter keberhasilan dari kegiatan budidaya rumput laut diukur berdasarkan dari hasil produksi thallus yang dibudidayakan. Metode budidaya yang digunakan dalam kegiatan budidaya rumput laut merupakan salah satu faktor penting yang dijadikan sebagai acuan keberhasilan. Penelitian ini bertujuan untuk mengkaji pertumbuhan dari rumput laut K. alvarezii yang dibudidayakan dengan metode lepas dasar menggunakan net bag yang dimodifikasi. Materi yang digunakan dalam penelitian ini adalah bibit rumput laut K. alvarezii (F2) yang diperoleh dari pembudidaya di Perairan Pulau Kemujan, Kepulauan Karimunjawa. Metode penelitian yang digunakan adalah eksperimen dengan rancangan percobaan berpola Rancangan Acak Lengkap. Perlakuan yang diujikan adalah rumput laut K. alvarezii yang dibudidayakan dengan perlakuan A (satu lapis jaring), perlakuan B (dua lapis jaring), dan perlakuan C (tiga lapis jaring). Penanaman bibit dilakukan selama 42 hari sejak penanaman. Parameter pengamatan meliputi laju pertumbuhan spesifik dan parameter kualitas perairan. Hasil penelitian menunjukkan terdapat pengaruh sistem budidaya lepas dasar menggunakan net bag (P < 0,05) terhadap laju pertumbuhan spesifik K. alvarezii. Metode net bag dengan satu lapis jaring memiliki pertumbuhan terbaik pada 4,95 ± 0,70 %g/hari. ABSTRACT: The success parameters of seaweed farming activities are measured based on the results of cultivated thallus. The cultivation method used in seaweed farming activities is one of the important factors used as a reference for success. This study aimed to assess the growth of K. alvarezii that was cultivated by employing off bottom method in a modified net bag system. The material used in this study was K. alvarezii (F2) seaweed seeds obtained from cultivators in Kemujan Island, Karimunjawa Islands. The research method used was an experiment with a completely randomized design patterned. The treatments tested were K. alvarezii which was cultivated by treatment A (single net), treatment B (double net), and treatment C (triple net). Planting of seeds was carried out for 42 days after planting. Observation parameters include specific growth rate and water quality parameters. ANOVA test results showed that there was a significant influence (P <0.05) on the absolute weight and specific growth rate of K. alvarezii. Results showed that single net bag method given the best growth rate at 4.95 ± 0.70 %g/day.
Ekologi Fitoplankton : Ditinjau dari Aspek Komposisi, Kelimpahan, Distribusi, Struktur Komunitas dan Indeks Saprobitas Di Perairan Morosari, Demak Putri, Cinthya Ruhanto; Djunaedi, Ali; Subagyo, Subagyo
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1174.715 KB) | DOI: 10.14710/jmr.v8i2.25103

Abstract

Perairan Morosari yang terletak di Kecamatan Sayung, Kabupaten Demak merupakan tempat terjadinya percampuran antara air darat dan air laut. Disekitar perairan Morosari terdapat pemukiman penduduk, industri wisata dan aktifitas nelayan. Aktivitas masyarakat dan wisatawan tersebut akan menimbulkan perubahan yang mengarah pada peningkatan pencemaran yang berimbas kepada keberadaan fitoplankton. Tujuan dari penelitian ini adalah untuk mengetahui komposisi, kelimpahan, distribusi, struktur komunitas dan indeks saprobitas fitoplankton di perairan Morosari. Metode yang digunakan dalam penelitian ini adalah deskriptif eksploratif dan penentuan lokasi menggunakan metode purposive sampling. Penelitian ini terbagi atas 3 sub-area di 3 area yang berbeda. Pengambilan sampel zooplankton dengan cara aktif dengan menarik planktonet secara horizontal. Hasil penelitian diperoleh 24 genera fitoplankton dari 3 kelas di perairan Morosari. Kelimpahan fitoplankton bervariasi antara 12.556 – 19.108 individu/m3. Distribusi fitoplankton tidak merata dan cenderung mengikuti arah arus. Indeks keanekaragaman menunjukkan nilai 1,70–2,25 yang termasuk dalam kategori sedang. Indeks keseragaman fitoplankton menunjukkan nilai 0,71–0,81 yang termasuk dalam kategori Tinggi. Indeks dominansi di perairan Morosari berkisar antara 0,18–0,29 dan termasuk ke dalam kriteria tidak ada jenis yang mendominasi. Indeks Saprobik menunjukkan nilai 0,6–1,3 yang termasuk dalam kategori β–Mesosaprobik. Morosari waters located in District Sayung, Demak Regency is waters area there is a mixture of land and sea water. Surrounding the Morosari waters there are residential, tourist industry and fishing activities. These activities will be affected changes that lead to increased pollution that affects the presence of phytoplankton. The purpose of this research was to know the composition, abundance, distribution, community structure and saprobity index of phytoplankton in Morosari waters, Sayung Subdistrict, Demak District. This research used deskriptive eksplorative method and determination location used purposive sampling method. The results obtained 24 genera phytoplankton of 3 classes. The abundance of phytoplankton ranges from 12.556-19.108 individu/m3. The distribution of phytoplankton is uneven and tends to follow the current direction. The phytoplankton Diversity Index indicated the values of 1,70–2,25 which were in the medium category. The phytoplankton evenness index indicated a value of 0,71 to 0,81 belonged to the High category. The dominance index in Morosari waters indicated no particular genus dominating with the values of 0,18-0,29. The Saprobik Index indicated the values of 0,6–1,3 which were into the category β –Mesosaprobic.
Pengaruh Konsentrasi KOH yang Berbeda Terhadap Kualitas Alginat Rumput Laut Coklat Sargassum duplicatum J. G. Agardh Anwar, Fauzi; Djunaedi, Ali; Santosa, Gunawan Widi
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (111.292 KB) | DOI: 10.14710/jmr.v2i1.2049

Abstract

Indonesia has plentiful resources and high biological diversity. One of them is brown seaweed Sargassum duplicatum which has potential as source for alginate. Alginate is often used in food and other industry, however extraction method is still becoming handycap to get high quality alginate. The objective of research was to know the effect of different concentration of soaking media KOH on quality of alginate. The method used was laboratory experiment. Design experiment applied was Completely Randomized Design (CRD) with three different concentrations of KOH, namely 0.3%, 0.5%, and 0.7%. Each treatment was repeated three times. The result showed that the highest yield was obtained at 0.3% KOH concentration at 33.63 ± 2.11%. The highest viscosity was obtained at 0.7% KOH concentration at 23.33 ± 2.08 cPs. The lowest water content was obtained at 0.7% KOH concentration at 14.71 ± 0.32%. The ashes content was obtained at 0.7% KOH concentration at 27.82 ± 0.88%.
Co-Authors A. Santoso ADI SANTOSO Adi Santoso Adi Suryanto Adi Suryanto Agung Sudaryono Agus Sabdono Agus Trianto Ali Ridlo Ambariyanto Ambariyanto Amelia, Aninda Putri Anggelina, Amelia Cahya Anggit Puji Muswantoro Apriliani, Seka Indah Ayu Permana Sari Ayuning Smita Rukmi Bagus Pitra Aditya Bagus Pitra Aditya Bambang Sulardiono Bambang Yulianto Br Ginting, Feny Amelia Chrisna Adhi Suryono Delianis Pringgenies Delianis Pringgenies Dyah Rahmawati Endang Supriyantini Endarwantti, Vionita Ervia Yudiati Farizan Adiya Pratama, Farizan Adiya Fauzi Anwar Gunawan Widi Santosa Irwani Irwani Ivend Umbu Jawa Ivend Umbu Jawa, Ivend Umbu Jauharul Fadli Kharisma Firdaus Linggarjati Lestari, Raisha Fahmida Dwi Ni’amillah Ni’amillah Norma Afiati Nur Taufiq S.P.J. Panatar, Jakfar Shodiq Putri, Cinthya Ruhanto Raden Ario Rafsanjani, Muhammad Eka Darmawan Reza Hafiz Pranajaya Ria Azizah Tri Nuraini Richardus Mahatmada Indrajati Ristiyanto, Ardi Rizqina, Cahya Rudhi Pribadi Sabiladiyni, Humairah Arifia Safitri, Shofi Firda Sarjito - Sarjito . Setyati , Wilis Ari Shafiya, Radila Widya Siti Aminah Sri Redjeki Subagiyo Subagiyo Subagyo Subagyo Sunaryo Sunaryo Sunaryo Sunaryo Turnip, Sarah Pebriyani Ulfah Rahmayani W. Widiatmoko Wibowo, Ichsan Suryo Zaenal Arifin