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INDONESIA
JOURNAL OF COASTAL DEVELOPMENT
Published by Universitas Diponegoro
ISSN : 14105217     EISSN : -     DOI : -
Core Subject : Education,
Education
The Journal of Coastal Development (ISSN 1410-5217) is dedicated to all aspects of the increasingly important fields of coastal and marine development, including but not limited to biological, chemical, cultural, economic, social, medical, and physical development. The journal is jointly published by the Research Institute of Diponegoro University, Semarang, Indonesia and Indonesian Assosiation of Oceanologist (ISOI).
Arjuna Subject : -
Articles 6 Documents
 1 
Search results for , issue "Vol 5, No 2 (2002): Volume 5, Number 2, Year 2002" : 6 Documents clear
CORROSION RATE OF COPPER AND IRON IN SEAWATER BASED ON RESISTANCE MEASUREMENT W.H. Rahmanto; , Gunawan; Rahmad Nuryanto
JOURNAL OF COASTAL DEVELOPMENT Vol 5, No 2 (2002): Volume 5, Number 2, Year 2002
Publisher : JOURNAL OF COASTAL DEVELOPMENT

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Abstract

Copper and iron metal wire corrosion in artificial sea water have been investigated in three corrosion systems, in the (i) closed bath, (ii) opened or air exposed bath, and (iii) aerated bath. The aim of our investigation is to determine the effect of oxygen contained in the air to the metals’ corrosivity.  Artificial sea water was  prepared by dissolving 173.59 g sodium chloride and 4.91 g potassium chloride in 7.00 kg of water at 230C.The corrosion experiment was carried out under the constant temperature of 32 0C. Decrease of metal masses during corrosion was monitored by measuring the metal resistance change. Our experiment provided the corrosion rate in g.cm-2.s-1 as 4.01 x 10-7 (in closed bath), 4.01 x 10-6 (in opened bath) and 9.43 x 10-6 (in aerated bath) of copper metal, and 2.12 x 10-6 (in closed bath), 5.99 x 10-6 (in opened bath), and 1.07 x 10-5 (in aerated bath) of iron metal. Experimental results show that air oxygen give strong effect on the corrosion of copper and iron metal
THE EFFECT OF CHITIN AND CHITOSAN OF CRAB SHELL ON WATER SORPTION OF ISOTHERM AND DENATURATION OF MYOFIBRILS DURING DEHYDRATION PROCESS Y. S. Darmanto
JOURNAL OF COASTAL DEVELOPMENT Vol 5, No 2 (2002): Volume 5, Number 2, Year 2002
Publisher : JOURNAL OF COASTAL DEVELOPMENT

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Abstract

Indonesian shrimp production is estimated at approximately  342,000 tons per year, followed by crab production at the level of more than 200,000 tons annually. Apparently, 50 – 60% out of the total production consists  of waste in the form of crab shell.  Crab shell is  rich in chitin, chitosan, and cellulose. The United States, Japan and other  developed industrial  countries have used chitin, chitosan, and cellulose as  raw material for various purposes, such as toxic waste processing, water purification, enzyme immobilization, skin and hair cosmetics, bone connecting, biomedicine, paper and textile industry, pharmacology, film, food industry, feed and others Chitin (C8H13NO5) is a Poly-b-N-Acetyl-D-GlucoSamine standing for a natural biopolymer, which constructs the shells of crab species. Chitin cannot be examined as a pure essence, since it is melt with rich texture of protein, CaCO3, fat pigmen, and small amount of metals. In order to fabricate Chitosan, one should demolish the Acetyl cluster of Chitin by employing strong alkalis. Chitin makes up the combination between Poly (N-acetyl-2-amino-2-deoxy-b-D-gluco-piranosa) and N-acetyl-2-amino-2-deoxy-D-glucopiranosa. To find out the effect of chitin and chitosan from crab shell on the water sorption isotherm of myofibrils protein during dehydration process, chitin and chitosan from crab shell were added to myofibrils protein at the ratio of ratio 2,5 – 7,5 g / 100 g,  homogenized, and afterwards dried in a dessicator. After some time, moisture content, water activity (Aw), Ca-ATPase activity, and proximate were analyzed. Mono layer water was analyzed according to Brunauer’s method (1968), multi-layer water was analyzed according to Bull’s method (1944), whereas Ca-ATPase activity was analyzed using the formula introduced by Katoh et. al. (1977). The result of the analyses shows that a higher concentration of chitin and chitosan on myofibrils resulted in higher amount of mono-layer and multi-layer water. The presence of different amount of mono-layer and multi-layer water indicates that the state of water changing occurs on myofibrils protein which in turn affects its quality. Likewise, the  increase of chitin and chitosan concentration  suppresses the  decrease of  acceleration of Ca-ATPase activity.
A COMPARISON OF CATCHABILITY BETWEEN “ARAD” (OTTER BOARD BOAT SEINE) OPERATED WITH AND WITHOUT TURTLE EXCLUDER DEVICES (TEDs) , Asriyanto; Herry Boesono
JOURNAL OF COASTAL DEVELOPMENT Vol 5, No 2 (2002): Volume 5, Number 2, Year 2002
Publisher : JOURNAL OF COASTAL DEVELOPMENT

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Abstract

The use of TEDs on the “Arad” (Otter Board Boat Seine Net) has never been done by fishermen from the northern part of the Java Sea in Central Java. In order to introduce this net and also to anticipate the shrimp embargo by World Trade Organization (WTO. TEDs construction  used in this study was Hooped TEDs with LxBxD dimension of 60x 40 x 60 cm; width of grids deflector of 5 cm) . This construction made an angle of 45°.  Fishing  operation with and without TEDs was done  9 times during the day.  Shrimp, fish, others and garbage entering the net were measured in terms of body weight and fish body circle  was also measured  in order to compare the result of each treatment. Both nets (with and without TEDs) contained Shrimp (Metapenaeus sp), Pilot-fish (Selaroides sp), Mackerel (Rastrelliger sp),  Hair-tails (Trichiurus sp,  Pony-fish(Leiognathus sp), others and garbage. The average  catch every hauling for the net with TEDs were : Shrimp 1.17 kg; Fish 1.66 kg; others 0.14 kg and garbage 0.1 kg; whereas the net without TEDs were : Shrimp 1.09 kg; Fish 2.33 kg, others 0.34 kg and garbage 1.31 kg. The average body circle of fish caught by net with TEDs was 4.0-7.4 cm and those caught by net without  TEDs was 4.0-8.9 cm. The  amount of fish and garbage caught  by using each treatment differed very  significantly, while the amount of shrimp caught did not.
AN OPEN-SYSTEM RESPIROMETER FOR MEASURING STEADY-STATE OXYGEN UPTAKE BY AQUATIC ANIMALS APPLIED TO THE SCALLOPS Pecten Maximus L. Djoko Suprapto
JOURNAL OF COASTAL DEVELOPMENT Vol 5, No 2 (2002): Volume 5, Number 2, Year 2002
Publisher : JOURNAL OF COASTAL DEVELOPMENT

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Abstract

An open-system respirometer for measuring steady-state oxygen uptake rate of aquatic animals is described. The principle of the measurement was to calculate the difference between the oxygen concentrations of the water entering the respiratory chambers with that out from the respiratory chambers. This difference indicated the oxygen consumed by the animals for their respiration. The measuring system was tested to calculate the oxygen consumption related to dry body weight of scallop Pecten maximus L. collected from different populations. This correlation was  expressed by allometric equation as: Y = aXb. The equation was then discussed with the finding of several authors.
COORDINATION AMONG LOCAL AGENCIES IN DECENTRALISED FISHERIES EXTENSION: COMPARATIVE PERCEPTION OF EXTENSION OFFICERS IN JAVA, INDONESIA , Waridin
JOURNAL OF COASTAL DEVELOPMENT Vol 5, No 2 (2002): Volume 5, Number 2, Year 2002
Publisher : JOURNAL OF COASTAL DEVELOPMENT

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Abstract

This study is intended to describe the conditions of coordination among local agencies involved in the implementation of decentralisation policy in fisheries extension in Java, Indonesia. In addition, this study is also aimed at assessing the effectiveness of the policy implementation, and determines its relationship to coordination among local agencies involved. Population of this study comprised all fisheries extension officers attached with Rural Extension Centres (RECs). A multi-stage random sampling method was utilised for selecting the subjects for the study. A total of 50 officers at 10 districts in three provinces were covered in this study. Data were collected during January to March 1998 by using interview and self-administered techniques. Descriptive statistics and correlation analyses were used in the study. The majority of officers confirmed that the RECs were not coordinated with related agencies involved in implementation of the policy. This indicates that policy implementation is not effectively done. Coordination among agencies involved was found to correlate highly to the effectiveness of policy implementation. Intensity of coordination among agencies involved in the policy implementation needs to be improved. A clearer directive for functions, responsibilities and relationships among agencies involved might help in strengthening the current coordination functions.
CHEMICAL ANALYSIS DURING THE PROCESSING OF DRIED SALTED ANCHOVY Eko Nurcahya Dewi
JOURNAL OF COASTAL DEVELOPMENT Vol 5, No 2 (2002): Volume 5, Number 2, Year 2002
Publisher : JOURNAL OF COASTAL DEVELOPMENT

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Abstract

Dried salted  anchovy is a rich source of  protein which is processed by boiling, salting and drying. During processing the protein undergoes change, e.g. protein myofibril  becomes denatured to some extent , and it can be visualised using SDS-PAGE protein pattern. Protein can also react with lipid to form brown colour mainly in  high temperature. The result of the analyses shown that there were differences in proximate composition between different samples of  anchovy. There were not much difference in sample band pattern for fresh , boiled ,  boiled and dried anchovy samples. The highest solubility protein was found in the Indonesian dried salted anchovy while the lowest was in fresh sample. The colour of boiled sample was the  whitest in comparison to fresh, boiled and dried, Indonesian dried salted anchovy and Japanese boiled. Except for Indonesian dried salted anchovy,  brown colour and development of  lipid oxidation was not detected.

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