Environmental biotechnology: the ongoing quest

Grommen, Roeland; Verstraete, Willy

doi:10.1016/s0168-1656(02)00090-1

Cited by 43 publications

(15 citation statements)

References 39 publications

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“…Microbial biocatalytic processes and biomineralization generally represent low cost remediation alternatives, for example costing approximately one tenth the cost of incineration (Grommen and Verstraete, 2002). Additionally biodegradation processes are argued to be fl exible and adaptable to variable environmental conditions.…”

Section: Advantages Of Bioremediationmentioning

confidence: 99%

Reclamation and Remediation of Solid Waste through Bio-chemical Process

D.S.Ramtek

2010

Bioremediation Technology

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Section: Advantages Of Bioremediationmentioning

confidence: 99%

Reclamation and Remediation of Solid Waste through Bio-chemical Process

D.S.Ramtek

2010

Bioremediation Technology

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“…Selain efek samping yang cukup berbahaya, dan harga yang relatif mahal, penggunaan bakterisidal juga dapat menyebabkan pencemaran lingkungan. Oleh karena itu, beberapa strategi lain telah dikembangan dalam pencegahan dan pengendalian penyakit dalam akuakultur yang meliputi: (1) perbaikan manajemen kualitas air (Grommen & Verstraete, 2002), (2) penggunaan immunostimulan (Sakai, 1999), (3) penggunaan probiotik (Gatesoupe, 1999), dan (4) aplikasi "green water sistem" (Cremen et al, 2007;Palmer et al, 2007).…”

Section: Pendahuluanunclassified

Bacterial quorum sensing and the role of algae in bacterial diseases control in aquaculture

Wiyoto¹,

Ekasari²

2010

Jurnal Akuakultur Indonesia

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Bacterial disease is one of the most common diseases in aquaculture practices which have a significant impact. Several researches noted that pathogenicity of a certain bacteria can be determined by its quorum sensing activity. Quorum sensing is a communication process of a certain bacteria with the same or different species of bacteria which involves the releasing and capturing of signal molecule to and from the environment. This activity will activate a certain target gene which further resulted in the expression of a phenotype by the bacteria. With regard to this characteristic, one of the methods to control bacterial diseases is by quorum sensing disruption. Several species of algae, both micro and macro, have been found to be able to intervense bacterial quorum sensing and thus can be used as an alternative in bacterial disease control.Keywords: quorum sensing, bacterial disease, aquaculture, algae. ABSTRAKPenyakit bakteri adalah salah satu penyakit yang paling umum dalam akuakultur dengan dampak yang cukup signifikan. Beberapa penelitian menunjukkan bahwa tingkat patogenitas suatu bakteri salah satunya ditentukan oleh aktivitas kuorum sensing bakteri. Kuorum sensing bakteri merupakan suatu proses komunikasi yang dilakukan oleh bakteri dengan bakteri lainnya baik yang sejenis maupun berlainan jenis yang berupa pelepasan dan penangkapan molekul sinyal menuju dan dari lingkungan sekitar bakteri tersebut. Aktivitas inilah yang akan menentukan ekspresi suatu gen target seperti patogenitas, sehingga salah satu metode yang dapat digunakan dalam mengendalikan penyakit yang disebabkan oleh bakteri adalah dengan mengganggu aktivitas kuorum sensing bakteri. Beberapa jenis alga, baik mikro maupun makro, diketahui dapat mengintervensi aktivitas kuorum sensing, dan dapat menjadi salah satu alternatif bagi pengendalian penyakit bakterial.Kata kunci: kuorum sensing, penyakit bakterial, akuakultur, alga. PENDAHULUANAkuakultur merupakan salah satu sektor penting dalam penyediaan pangan dunia. Pada tahun 2006, pertumbuhan tahunan sektor akuakultur mencapai 8,3% dan memberikan kontribusi pada total produksi perikanan dunia sekitar 47% (FAO, 2009). Meningkatnya permintaan produk akuakultur mendorong upaya-upaya peningkatan produktivitas salah satunya melalui intensifikasi. Tingginya aktivitas produksi dalam perikanan budidaya sistem intensif membawa masalah lain yang perlu segera ditangani seperti penurunan kualitas air dan peningkatan infeksi penyakit (Thompson et al., 2004;Nakayama et al., 2005) yang dapat mempengaruhi tidak hanya produksi, tetapi juga lingkungan (Corre et al., 1999;Thompson et al., 2004). Tingginya kepadatan penebaran ikan dalam sistem intensif secara tidak langsung dapat meningkatkan resiko penyebaran penyakit menjadi lebih cepat dan luas dengan kerugian yang lebih besar.Input pakan dan kepadatan organisme budidaya yang tinggi menyebabkan peningkatan akumulasi bahan organik dalam akuakultur sistem intensif yang berdampak pada penurunan kualitas air.

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“…1,2 Most synthetic plastics do not decompose naturally, which has caused the serious environmental problem of pollution from the waste polymers. Biodegradable polymers are polymers which completely degrade by the action of biological organisms such as proteins (for example, collagen hydrolyzate) and carbohydrates.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of biodegradable thermoplastic films based on collagen hydrolyzate

Haroun

2009

J of Applied Polymer Sci

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The increasing use of plastics and their nonbiodegradability have raised environmental awareness and hence there is a need for the development of environmentally friendly degradable materials. One of the ways to reach this goal is via the modification of the synthetic polymer, modified polyethylene (MPE), with protein, collagen hydrolyzate (CH). CH is a biopolymer isolated from hide/skin fleshing of untanned solid waste from the leather industry after enzymatic hydrolysis. An investigation on the blending of MPE with CH using polymer melt technique is reported. The resulting thermoplastic films were evaluated using Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA/DTA), and scanning electron microscope (SEM), in addition to simulated soil burial respirometric testing. It is interesting to note that CH easily blends with MPE, but like other biopolymers, it also has effects on the original mechanical properties of the MPE. The CH addition in the blend significantly increases the biodegradation rate. The effect of CH on MPE biodegradability has been investigated. About 53% biodegradation is observed, after 24 days, when the polymer is blended with 5% CH and about 63% biodegradation is found in the case of polymer blended with 20% CH. Although MPE/CH thermoplastic film with 40% CH have shown better performance in biodegradation, the mechanical strength properties were rather poor in this case. The optimum thermoplastic film composition for blending of CH with MPE is about 10-20 wt % CH, which retains an acceptable range of compatibility, mechanical strength, and biodegradability.

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Environmental biotechnology: the ongoing quest

Cited by 43 publications

References 39 publications

Reclamation and Remediation of Solid Waste through Bio-chemical Process

Reclamation and Remediation of Solid Waste through Bio-chemical Process

Bacterial quorum sensing and the role of algae in bacterial diseases control in aquaculture

Preparation and characterization of biodegradable thermoplastic films based on collagen hydrolyzate

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