The correlation between organic matrices and biominerals (myostracal prism and folia) of the adult oyster shell, Crassostrea gigas

Micron ◽  
2007 ◽  
Vol 38 (1) ◽  
pp. 58-64 ◽  
Author(s):  
Seung Woo Lee ◽  
Cheong Song Choi
Keyword(s):  
Crassostrea Gigas ◽  
Oyster Shell ◽  
Organic Matrices ◽  
Adult Oyster

scholarly journals Characteristics of the Aragonitic Layer in Adult Oyster Shells,Crassostrea gigas: Structural Study of Myostracum including the Adductor Muscle Scar

2011 ◽  
Vol 2011 ◽  
pp. 1-10 ◽  
Author(s):  
Seung-Woo Lee ◽  
Young-Nam Jang ◽  
Jeong-Chan Kim
Keyword(s):  
Crassostrea Gigas ◽  
Phase Interface ◽  
Single Layer ◽  
Oyster Shell ◽  
Organic Matrix ◽  
Transitional Zone ◽  
Adductor Muscle ◽  
Muscle Scar ◽  
Entire Structure ◽  
Adult Oyster

Myostracum, which is connected from the umbo to the edge of a scar, is not a single layer composed of prismatic layers, but a hierarchically complex multilayered shape composed of minerals and an organic matrix. Through the analysis of the secondary structure, the results revealed that aβ-antiparallel structure was predominant in the mineral phase interface between the myostracum (aragonite) and bottom folia (calcite). After the complete decalcification and deproteinization, the membrane obtained from the interface between the myostracum buried in upper folia, and the bottom folia was identified as chitin. The transitional zone in the interface between the adductor muscle scar and folia are verified. The myostracum disappeared at the edge of the scar of the posterior side. From this study, the entire structure of the myostracum from the adult oyster shell ofCrassostrea gigascould be proposed.

Primary Structure of Myostracal Prism Soluble Protein (MPSP) in Oyster Shell, Crassostrea gigas

2006 ◽  
Vol 25 (4) ◽  
pp. 288-294 ◽  
Author(s):  
Seung Woo Lee ◽  
Young Moon Kim ◽  
Hong Seok Choi ◽  
Jai Myung Yang ◽  
Cheong Song Choi
Keyword(s):  
Primary Structure ◽  
Crassostrea Gigas ◽  
Soluble Protein ◽  
Oyster Shell

scholarly journals Oyster Shell Waste (Crassostrea Gigas) as A Cheap Adsorbent for Adsorption Of Methylene Blue Dyes: Equilibrium and Kinetics Studies

2021 ◽  
Vol 1 (4) ◽  
pp. 95-102
Author(s):  
Muhammad Muhammad ◽  
Meriatna Meriatna ◽  
Nia Afriani ◽  
Rizka Mulyawan
Keyword(s):  
Methylene Blue ◽  
Correlation Coefficient ◽  
Crassostrea Gigas ◽  
Adsorption Process ◽  
Adsorption Equilibrium ◽  
Oyster Shell ◽  
Second Order ◽  
Order Model ◽  
Pseudo Second Order ◽  
Shell Powder

In this study, Oyster (Crassostrea gigas) shell powder which contains calcium carbonate (CaCO3) was converted into calcium oxide (CaO). The Oyster shell powder that had been activated was utilized for the adsorption of the methylene blue (MB) dyeing material, which is one of waste water concerns. Oyster shells were crushed and sieved into 100 mesh sized powder and then calcinated at a temperature of 600℃ and 800℃ both for 4 hours period. To determine the adsorption equilibrium, methylene blue (MB) solution was used with varying concentration from 10 to 50 mg/L in which the adsorbent weighing 3 g was put into a conical flash and shaken until the adsorption equilibrium was reached. As for the adsorption kinetics, 250 mL MB solution was used with initial concentrations of 10, 20 and 30 mg/L, with an adsorbent weight of 3 g and a solution at pH 11 for each concentration. The evaluation of the experimental data from the adsorption process is well explained by the Freundlich equation, with the correlation coefficient value (R2) found to be 0.9999, where the value of the adsorption intensity (n) is close to unity; this shows that the adsorption is multilayer or in other words the adsorption energy is heterogeneous. The kinetics study also shows that pseudo second-order model is the most applicable to the adsorption process. From the pseudo-second-order model, with the correlation coefficient between 0.9984 - 0.9999 can explain that the methylene blue (MB) adsorption process is chemically based sorption or in other words termed as chemisorption.

scholarly journals In situ distribution and characterization of the organic content of the oyster shell Crassostrea gigas (Mollusca, Bivalvia)

Micron ◽  
2013 ◽  
Vol 44 ◽  
pp. 373-383 ◽  
Author(s):  
Yannicke Dauphin ◽  
Alexander D. Ball ◽  
Hiram Castillo-Michel ◽  
Corinne Chevallard ◽  
Jean-Pierre Cuif ◽  
...  
Keyword(s):  
Crassostrea Gigas ◽  
Oyster Shell ◽  
Organic Content

scholarly journals Penambahan nanokalsium cangkang tiram (Crassostrea gigas) pada pakan dengan dosis berbeda terhadap pertumbuhan udang galah (Macrobachium rosenbergii)

2019 ◽  
Vol 6 (2) ◽  
pp. 80
Author(s):  
Nina Fitriana ◽  
Lia Handayani ◽  
Nurhayati Nurhayati
Keyword(s):  
Survival Rate ◽  
Experimental Design ◽  
Crassostrea Gigas ◽  
Macrobrachium Rosenbergii ◽  
Oyster Shell ◽  
Randomized Design ◽  
Commercial Feed ◽  
Recirculation System ◽  
Completely Randomized Design ◽  
Different Doses

AbstrakPenelitian ini bertujuan untuk mengetahui pengaruh Penambahan nanokalsium cangkang tiram (Crassostrea gigas) pada pakan dengan dosis berbeda terhadap pertumbuhan udang galah (macrobrachium rosenbergii). Rancangan percobaan yang digunakan adalah Rancangan Acak Lengkap (RAL) dengan 4 perlakuan dan 3 ulangan, pada perlakuan A (pakan komersial tanpa penambahan CaO). Perlakuan B (pakan komersial dengan tambahan 1% CaO), perlakuan C (pakan komersial dengan penambahan 2% CaO), perlakuan D (pakan komersial dengan penambahan 3% CaO). Kemudian selama penelitian 2 bulan pada akuarium dilengkapi juga sistem resirkulasi. Hasil penelitian menunjukkan dengan penambahan nanokalsium sebanyak 2% berpengaruh nyata terhadap kelangsungan hidup Udang yaitu A 95.0%, B 95.0%, C 100% dan D 92.5%, dan pada frekuensi molting udang galah memiliki tingkat tertinggi yaitu A 0,64 kali/ekor, lalu diikuti oleh perlakuan B 0,63 kali/ekor, kemudian diikuti oleh perlakuan D yaitu 0,53 kali/ekor, dan yang terendah diikuti oleh perlakuan A 0,51 kali/ekor.Kata kunci: nanokalsium; kelangsungan hidup; pertumbuhan; udang galahAbstractThis study aims to determine the effect of the addition of oyster shell nano-calcium (Crassostrea gigas) at different doses on the growth of giant shrimp (Macrobrachium rosenbergii). The experimental design used was Completely Randomized Design (CRD) with four treatments and two replications, in treatment A (commercial food without CaO addition). Treatment B (commercial feed with additional CaO 1%), treatment C (commercial feed with the addition of 2% CaO), treatment D (commercial feed with an addition of 3%). Then for two months of research there was an aquarium equipped with a recirculation system. The results showed that with nano-calcium approvals of 2% real participation in the survival of giant prawns, namely A 95.0%, B 95.0%, C 100% and D 92,5 %. and the moulting frequency of giant shrimp has the highest level of C 0.64 times/individual, then followed by treatment B 0.63 times/individual, then followed by treatment D 0.53 times/individual, and the lowest was followed by treatment A 0.51 times/individual.Keywords: nano-calcium; survival rate; growth; giant prawn

Characteristic crystal orientation of folia in oyster shell, Crassostrea gigas

2008 ◽  
Vol 28 (2) ◽  
pp. 258-263 ◽  
Author(s):  
Seung Woo Lee ◽  
Gyeung Ho Kim ◽  
Cheong Song Choi
Keyword(s):  
Crassostrea Gigas ◽  
Crystal Orientation ◽  
Oyster Shell

scholarly journals Production and Characterization of Adsorbent from Oyster Shell (Crassostrea gigas) Using Physics and Chemical Activation with ZnCl2 and Its Application for Removal of Hexavalent Chromium

Elkawnie ◽  
2020 ◽  
Vol 6 (2) ◽  
pp. 329
Author(s):  
Lia Handayani ◽  
Azwar Thaib ◽  
Nurhayati Nurhayati ◽  
Yayuk Astuti ◽  
Adi Darmawan
Keyword(s):  
Hexavalent Chromium ◽  
Crassostrea Gigas ◽  
Chemical Activation ◽  
Oyster Shell ◽  
Sem Analysis ◽  
Raw Material ◽  
Physical Activation ◽  
Shell Waste

Abstract: Oyster shell waste has been investigated as a raw material for making adsorbents that will be activated. Physical activation uses temperatures of 500 ºC, 600 ºC, 700 ºC, 800 ºC, 900 ºC and chemical activation uses ZnCl2 with a concentration of 1 %, 5 %, 10 % and 15 %. Based on the analysis of the characteristics that have been carried out for physically activated adsorbents, the oyster shell calcined at 800 ºC produces the best characteristics, it is a radius of 35.11 Å with a percentage of removal of 38.04 %, as well as the results of the FTIR, XRF and SEM analysis gives the best results among others. Whereas for chemically activated adsorbents, the use of activator ZnCl2 10% produces adsorbents with the best characteristics among others with a radius of 84.14 Å and removal percentage of 65.68 %, the best results for adsorbents activated using 10% ZnCl2 are also supported by analysis results given by FTIR, XRF, and SEM.Keywords: Adsorbent; BET; Cr6+; Oyster Shell Waste; XRF Abstrak: Cangkang tiram (Crassostrea gigas) telah diteliti sebagai bahan baku pembuatan adsorben yang akan diaktivasi secara fisika dan kimia. Pembuatan adsorben dengan aktivasi secara fisika menggunakan variasi suhu 500 ºC, 600 ºC, 700 ºC, 800 ºC dan 900 ºC. sedangkan aktivasi kimia yaitu menggunakan aktivator ZnCl2 menggunakan variasi konsentrasi 1 %, 5 %, 10% dan 15 %. Berdasarkan analisa karakteristik yang telah dilakukan untuk adsorben-adsorben yang telah diaktivasi secara fisika, cangkang tiram yang di kalsinasi pada suhu 800ºC menghasilkan karakteristik yang paling baik, yaitu radius pori-pori 35,11 Å dengan persentase penyisihan sebesar 38,04 %, begitu pula dengan hasil analisa FTIR, XRF dan SEM memberikan hasil terbaik diantara yang lain. sedangkan untuk adsorben-adsorben yang diaktivasi secara kimia, penggunaan aktivator ZnCl2 10% menghasilkan adsorben dengan karakteristik yang paling baik diantara lainnya dengan radius pori-pori 84,14 Å dan persentase penyisihan sebesar 65,68%, hasil terbaik untuk adsorben yang diaktivasi menggunakan ZnCl2 10 % juga didukung oleh hasil analisa dari FTIR, XRF dan SEM.

scholarly journals The Characterization of Oyster Shell (Crassostrea gigas) as Adsorbent in The Removal of Cr(VI) Ions. A Study of NaOH and H2SO4 Activation Effect

Elkawnie ◽  
2020 ◽  
Vol 6 (1) ◽  
pp. 77
Author(s):  
Lia Handayani ◽  
Cut Rahmawati ◽  
Nurhayati Nurhayati ◽  
Yayuk Astuti ◽  
Adi Darmawan
Keyword(s):  
Heavy Metal ◽  
High Temperature ◽  
Surface Area ◽  
Crassostrea Gigas ◽  
Oyster Shell ◽  
Activation Effect ◽  
X Ray ◽  
Ion Removal

Abstract : Oyster shell as one of the highest bio-waste in Alue Naga Aceh Besar District, Indonesia, was used as an adsorbent to remove a heavy metal Cr (VI) ion. The study was started by calcinating oyster shells at a high temperature of 800 ºC for 3 hours. The effect of various acid (H2SO4) and base (NaOH) activator was studied using characterization and adsorption experiments. The characterization obtained the sample activated by 10% NaOH (Na10-ACT) and 10% H2SO4 (H10-ACT) had the highest surface area which had 14.23 m2/g, 10.77 m2/g, respectively. Furthermore, the adsorption experiments confirmed the highest surface area by showing the highest Cr (IV) ion removal of 57.66%, 70.7%, respectively. The further investigation using X-ray fluorescence (XRF) determined that the Na10-ACT adsorbent has a better composition compared to the H10-ACT due to its high purities.Abstrak : Cangkang tiram sebagai salah satu bio-limbah padat di Desa Alue Naga Kabupaten Aceh Besar, digunakan sebagai adsorben untuk menghilangkan ion logam berat Cr (IV). Penelitian ini diawali dengan mengkalsinasi cangkang tiram pada temperatur tinggi 800ºC selama tiga jam. Pengaruh penambahan aktivator asam (H2SO4) dan basa (NaOH) juga dipelajari melalui karakterisasi dan pengujian adsorpsi. Hasil karakterisasi menunjukkan sampel yang diaktivasi dengan 10% NaOH (Na10-ACT) dan 10% H2SO4 (H10-ACT) memiliki luas permukaan tertinggi yaitu 14,23 m2/g, 10,77 m2/g, masing-masing. Lebih lanjut, pengujian adsorpsi juga mendukung luas permukaan yang tinggi dengan menghilangkan ion Cr (IV) sebesar 57,66%, 70,7%, masing-masing. Investigasi melalui analisa XRF menyimpulkan bahwa Na10-ACT memiliki komposisi yang lebih baik dibanding H10-ACT karena memiliki kemurnian yang tinggi.

scholarly journals Perbandingan frekuensi molting Lobster air tawar (Cherax quadricarinatus) yang diberi pakan komersil dan nanokalsium yang berasal dari cangkang tiram (Crassostrea gigas)

DEPIK ◽  
2018 ◽  
Vol 7 (1) ◽  
pp. 42-46
Author(s):  
Lia Handayani ◽  
Faisal Syahputra
Keyword(s):  
Growth Rate ◽  
Solid Waste ◽  
Crassostrea Gigas ◽  
Oyster Shell ◽  
Cherax Quadricarinatus ◽  
Calcium Supplements ◽  
Calcium Addition ◽  
Calcium Source ◽  
Survival And Growth ◽  
Effect On Growth

Oyster shell can be used as alternative calcium source. Utilizing of oyster shell into nano calcium flour can be used to decrease solid waste. The usage of nano calcium flour in feed is important applied as calcium supplements with cherax quadricarinatus. The purpose of this research is to study the effect of nano calcium addition on feeds to increase moulting frequency, survival and growth rate of freshwater lobster. This research has been done during 60 days in fisheries Laboratory, Abulyatama University. Two percents nano calcium addition on feeds gives significant effect on growth rate and very significant effect to moulting frequency of freshwater lobster. Which has moulting frequency 2.71. Where the treatment was not added nano calcium has moulted frequency 1.29. But, nano calcium addition on foods did not affect survival rate.Cangkang tiram dapat digunakan sebagai alternatif sumber kalsium. Pemanfaatan cangkang tiram menjadi serbuk nanokalsium dapat mengurangi limbah padat. Penggunaan serbuk nanokalsium pada pakan penting dilakukan sebagai suplemen kalsium untuk lobster air tawar. Penelitian ini bertujuan untuk mengetahui pengaruh penambahan nanokalsium pada pakan terhadap pertumbuhan, frekuensi molting dan kelangsungan hidup Lobster Air Tawar (LAT). Penelitian ini dilakukan selama 60 hari di laboratorium perikanan, Universitas Abulyatama. Data dianalisa menggunakan uji T (perbandingan) antara lobster yang diberi pakan nanokalsium dan tanpa penambahan nanokalsium. Nanokalsium yang ditambahkan ke dalam pakan sebanyak 2% berpengaruh nyata terhadap pertumbuhan lobster air tawar (thitung ttabel), dan berpengaruh sangat nyata terhadap jumlah molting dengan frekuensi molting 2,71 kali/ekor terhadap lobster yang diberi pakan nano CaO, sedangkan yang diberi pakan komersil hanya 1,29 kali/ekor. Namun, tidak berpengaruh terhadap tingkat kelangsungan hidup (thitung ttabel).

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