Effect of drying temperature on carrageenan yield and quality of Kappaphycus alvarezii (Rhodophyta, Solieriaceae) cultivated in Brazil

Faria, Gabriel Soares Mattar de; Hayashi, Leila; Monteiro, Alcilene Rodrigues

doi:10.1007/s10811-013-0172-7

Cited by 4 publications

(3 citation statements)

References 14 publications

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“…alvarezii (formerly known as Eucheuma cottonii ) [ 6 ]. Our present study, which showed that seaweeds incubated at 32, 36 and 40°C produced significantly lower carrageenan yield compared to seaweeds incubated at 28°C, corroborate with previous studies [ 53 – 55 ], which reported that incubation of seaweeds beyond conducive temperature lowers their gel strength and gel viscosity. According Campo et al .…”

Section: Discussionsupporting

confidence: 93%

Impact of elevated temperature on the physiological and biochemical responses of Kappaphycus alvarezii (Rhodophyta)

et al. 2020

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The eucheumatoids Kappaphycus and Eucheuma are cultivated in tropical or subtropical regions for the production of carrageenan, a hydrocolloid widely used in the food and cosmetic industries. Kappaphycus alvarezii is a highly valued economic crop in the Coral Triangle, with the Philippines, Indonesia and Malaysia ranked among the largest producers. In the absence of measures to mitigate climate change, extreme events including heatwaves, typhoons, severe El Niño and La Niña, are expected to increase in frequency and magnitude. This inadvertently brings adverse effects to the seaweed cultivation industry, especially in the tropics. Temperatures are rapidly reaching the upper limit of biologically tolerable levels and an increase in reports of ice-ice and pest outbreaks is attributable to these shifts of environmental parameters. Nevertheless, few reports on the response of eucheumatoids to a changing environment, in particular global warming, are available. Understanding the responses and possible mechanisms for acclimation to warming is crucial for a sustainable seaweed cultivation industry. Here, the physiological and biochemical responses of K . alvarezii to acute warming indicated that the strain used in the current study is unlikely to survive sudden increases in temperature above 36°C. As temperature increased, the growth rates, photosynthetic performance, phycocolloid quality (carrageenan yield, gel strength and gel viscosity) and pigment content (chlorophyll- a , carotenoid and phycobiliproteins) were reduced while the production of reactive oxygen species increased indicating the occurrence of stress in the seaweeds. This study provides a basis for future work on long term acclimation to elevated temperature and mesocosm-based multivariate studies to identify heat-tolerant strains for sustainable cultivation.

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Section: Discussionsupporting

confidence: 93%

Impact of elevated temperature on the physiological and biochemical responses of Kappaphycus alvarezii (Rhodophyta)

et al. 2020

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“…These molecular weight differences can be explained by the different production processes. It is known that elevated temperatures and prolonged extraction and drying times can cause carrageenan degradation [ 17 , 39 ]. The results indicated that the carrageenan degradation rate was accelerated at higher temperatures, as lower molecular weight carrageenans were obtained.…”

Section: Resultsmentioning

confidence: 99%

Impact of short-term heat treatment on the structure and functional properties of commercial furcellaran compared to commercial carrageenans

Eha¹,

Pehk²,

Heinmaa³

et al. 2021

Heliyon

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In the production of biopolymers, the processing operations (e.g. extraction and drying) involve some degradation of the polysaccharide-causing structural and functional changes in final products. In this study, short-term heat treatment (75–115 °C, 15 min) influence on commercial carrageenans' — furcellaran, κ-carrageenan, ι-carrageenan and a κ/λ-carrageenan — structure, molecular weight and gel rheology was studied. Compared with other carrageenans, commercial furcellaran that had undergone multiple heatings at high temperatures during production was found to be susceptible to polymer degradation. Heat caused the desulphation and degradation of furcellaran galactans and the molecular weight was significantly decreased, causing a drop in viscosity and gel hardness. The loss of the network cross-linking of furcellaran gels was confirmed by scanning electron microscopy. Carrageenan gel storage modulus values decreased with the increase in the temperature of the treatment. The greatest decrease in storage modulus values occurred with κ/λ-carrageenan gels, followed by ι-carrageenan > furcellaran > κ-carrageenan.

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“…Pengeringan sampel dengan oven pada suhu 60 0 C dan 70 0 C bertujuan untuk tidak merusak kualitas rumput laut. Pengeringan pada suhu yang tinggi akan mengakibatkan kerusakan pada sel bahan (Faria et al, 2014).…”

Section: Hasil Dan Pembahasanunclassified

Pengaruh Perbedaan Suhu Pengeringan Terhadap Kualitas Kadar Air dan Kadar Abu Karagenan Rumput Laut Kappaphycus alvarezii

Panjaitan,

Suryono,

Pramesti

2024

J. Mar. Res.

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Kappaphycus alvarezii adalah jenis rumput laut dari divisi Rhodophyta penghasil kappa karaginan. Karaginan diperoleh dari metabolisme primer rumput laut K. alvarezii dan merupakan senyawa polisakarida yang mengandung sejumlah unit galaktosa. Karaginan adalah senyawa hidrokoloid yang memiliki senyawa polisakarida rantai panjang. Tujuan penelitian ini yaitu mengetahui kualitas kadar air dan kadar abu karaginan dari rumput laut K. alvarezii dengan perbedaan suhu pengeringan. Metode penelitian yang dipergunakan merupakan metode ekperimental laboratoris dan analisis data dengan Rancangan Acak Lengkap (RAL). Perlakuan pengeringan rumput laut K. alvarezii dilakukan menggunakan oven dengan suhu 600 C dan 700 C serta pengeringan sinar matahari sebagai perlakuan kontrol. Hasil penelitian menunjukkan kadar air karaginan yang diperoleh dari pengeringan dengan suhu 600 C yaitu 11,06% dan pengeringan dengan suhu 700 C yaitu 13,34%. Kadar abu yang diperoleh dari pengeringan dengan suhu 600 C yaitu 16,30% dan pengeringan dengan suhu 700 C yaitu 19%. Rendemen karaginan yang diperoleh dari perlakuan pengeringan dengan suhu 600 C yaitu 40,51% dan pengeringan dengan suhu 700 C yaitu 29,71%. Berdasarkan hasil analisis sidik ragam (Anova) diketahui bahwa tidak ada pengaruh perbedaan suhu terhadap kualiatas kadar air dan kadar abu karaginan K. alvarezii. Kappaphycus alvarezii is a type of seaweed from the Rhodophyta division that produces kappa carrageenan. Carrageenan is obtained from the primary metabolism of K. alvarezii seaweed and is a polysaccharide compound containing a number of galactose units. Carrageenan is a hydrocolloid compound that has a long chain polysaccharide compound. The purpose of this study was to determine the quality of water content and ash content of carrageenan from K. alvarezii seaweed with different drying temperatures. The research method used is a laboratory experimental method and data analysis with a completely randomized design (CRD). The treatment of drying K. alvarezii seaweed was carried out using an oven with a temperature of 600 C and 700 C and sun drying as a control treatment. The results showed that the moisture content of carrageenan obtained from drying at 600 C was 11.06% and drying at 700 C was 13.34%. The ash content obtained from 600 C drying was 16.30% and 700 C drying was 19%. The yield of carrageenan obtained from drying treatment with a temperature of 600 C is 40.51% and drying with a temperature of 700 C is 29.71%. Based on the results of analysis of variance (Anova), it is known that there is no effect of temperature differences on the quality of water content and ash content of K. alvarezii carrageenan.

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Effect of drying temperature on carrageenan yield and quality of Kappaphycus alvarezii (Rhodophyta, Solieriaceae) cultivated in Brazil

Cited by 4 publications

References 14 publications

Impact of elevated temperature on the physiological and biochemical responses of Kappaphycus alvarezii (Rhodophyta)

Impact of elevated temperature on the physiological and biochemical responses of Kappaphycus alvarezii (Rhodophyta)

Impact of short-term heat treatment on the structure and functional properties of commercial furcellaran compared to commercial carrageenans

Pengaruh Perbedaan Suhu Pengeringan Terhadap Kualitas Kadar Air dan Kadar Abu Karagenan Rumput Laut Kappaphycus alvarezii

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