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Abstract Topic: AGRO FORESTRY AND BIODIVERSITY

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Aqueous Extraction of Galactomannan from Various Palmae as Alternative Materials: A Review
Indra Saputra Kurniawan (a*), Susinggih Wijana (a), Aji Sutrisno (b)

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Corresponding Author
Indra Saputra Kurniawan

Institutions
a) Department of Agro-industrial Technology Faculty of Agricultural Technology Brawijaya University Malang, Indonesia
* ikurniawan131[at]gmail.com
b) Department of Agricultural Product Technology Faculty of Agricultural Technology Brawijaya University Malang, Indonesia

Abstract
This review paper discusses the physicochemical characteristics of three different species of Palmae (Arenga pinnata, Cocos nucifera, dan Nypa fruticans) as alternative materials to produce galactomannans. Galactomannan has generally been widely applied and used in the food, pharmaceutical, cosmetic and paper industries. The major galactomannans of commercial importance in industries (guar gum, tara gum and locust bean gum) are limited in Indonesia. Therefore important to search for alternative renewable sources. The galactomannans were obtained by aqueous extraction followed by a precipitation with ethanol. The yield, monosaccharide composition and physicochemical parameters of the extracted galactomannans are different. The results confirm the possibility to produce galactomannan from various palms.

Keywords
galactomannans; aqueous extraction

Topic
AGRO FORESTRY AND BIODIVERSITY

Link: https://ifory.id/abstract/Q8nLcMx6GwhH


Local Knowledge Conservation for Biodiversity Conservation (A case of Sulawesi, Indonesia)
Martina A. Langi

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Corresponding Author
Martina Langi

Institutions
Sam Ratulangi University

Abstract
The purpose of the work is to provide an overview of relevant studies that portray the active role that rural communities in Sulawesi have played in generating knowledge based on a practiced understanding of their environment. For long periods of time local peoples have depended on their own environments for the provision of a variety of resources, and somehow have developed certain ways in conserving biodiversity. Through a long history of observations and resource-use practices local people then often possess a broad knowledge that has accumulated through generation to generation. This can be of great value and complement the scientific knowledge we have today. They are naturally aware that “biological diversity” is a crucial in generating the ecological services and natural resources on which they depend. Their practices for the conservation of biodiversity were obtained through trial and error processes over a long historical time period. Conserving this knowledge would be most appropriately accomplished through promoting the community-based resource-management systems of local peoples. Results show that their knowledge base is indefinite and their implementation involves an intimate relationship with the belief system that conservation of biodiversity is fully recognized if ecosystems and biodiversity are to be managed sustainably.

Keywords
local knowledge, biodiversity, conservation

Topic
AGRO FORESTRY AND BIODIVERSITY

Link: https://ifory.id/abstract/gH37F4E9UntZ


Optimization of Bleaching Process in Handmade PaperMaking From Areca catechu L. Fiber Using Response Surface Method (Study of Process Bleaching Time and H2O2 Content)
Ika Atsari Dewi, Susinggih Wijana, Panji Deoranto, Azimmatul Ihwah, Mungki Septian Romas

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Corresponding Author
Ika Atsari Dewi

Institutions
Universitas Brawijaya, Balai Besar Pulp dan Kertas (Central of Pulp and Paper) Indonesia

Abstract
Betel plant (Areca catechu L.) is a type of palm that is used for commercial purposes because it has high economic value in every part. Areca nut contains cellulose of 53.2%, so it has the potential to be used as raw material for pulp making for paper craft. In making paper craft to obtain brighter colors, bleaching process is needed to attract attention when viewed. During the bleaching process the factors that must be considered are the levels of chemicals for bleach and the length of time during the bleaching process. The purpose of this study was to determine the addition of H2O2 levels and the length of time for optimal bleaching in the manufacture of paper from areca fibers and used packagingcardboard paperboard to produce quality paper craft in terms of physical paper, namely tensile strength, paper thickness, grammager and brightness. Response surface method (RSM) is a collection of statistical and mathematical techniques that are used to develop, improve and optimize the process, where the response is determined to be influenced by several variables that aim to optimize the predetermined response. This method can be applied to chemical processes. The model used in RSM is CCD (Central Design Composite (CDC) using 2 treatment factors, namely the first factor is the length of bleaching time (X1) and the second factor is H2O2 (X2). The first factor uses an upper limit of 90 minutes (X1 = -1) and a lower limit of 150 minutes (X1 = 1). The second factor uses the upper limit of 5% (X1 = -1) and the lower limit of 15% (X1 = 1). The response to be tested is tensile strength and brightness level. In the combination treatment of bleaching time and H2O2, the best treatment was 150 minutes and 15% H2O2. The optimal response results obtained are 69.50% brightness and 14.71 kN/m2 tensile strength. Other physical test results of art paper are 282 gr/cm2, 0.88 mm thickness and 6.5% moisture content.

Keywords
Areca Nut Fiber, H2O2, Handmade Paper, Response Surface Method

Topic
AGRO FORESTRY AND BIODIVERSITY

Link: https://ifory.id/abstract/deqUZguKWrVm


Physico-chemical characterization of sweetpotato (Ipomea batatas) germplasm as a material in the breeding program
Rahmi Yulifianti* and Wiwit Rahajeng

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Corresponding Author
Rahmi Yulifianti

Institutions
Indonesian Legumes and Tuber Crops Research Institute (Iletri)
Jl. Raya Kendalpayak, Km. 8, Malang 65101, East Java, Indonesia

*Corresponding e-mail: rahmi_stp[at]yahoo.com

Abstract
Abstract. Information on the diversity of physico-chemical properties of sweet potato varieties is required to determine their use as raw materials for food, feed, and bioindustry. The purpose of this study was to obtain information on the diversity of physico-chemical characters of sweet potato germplasm accessions using cluster analysis methods. Of the 50 sweet potato accessions that were observed, most of the tubers fleshed were white and cream color, others were purple color, a combination of purple cream, or a combination of orange cream. Of the 11 accessions have high dry matter content (> 30%), 24 accessions are relatively high (> 58.21% db), and 11 accessions are high in reducing sugar (6.83% db). Based on the cluster analysis, 50 sweet potato germplasm accessions are divided into eight groups on the similarity degree of 75%. This information can be used to select the accession of sweet potato as a crossing material in the breeding program the desired high-yield, especially those that are superior in terms of their chemical content for their suitability.

Keywords
Sweetpotato germplasm, physico-chemical characteristics

Topic
AGRO FORESTRY AND BIODIVERSITY

Link: https://ifory.id/abstract/EHAJZt9CuyjK


TREE TRAITS THAT DEFINE TIMBER IDEOTYPES OF GMELINA ARBOREA ROXB.
Shierel F. Vallesteros

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Corresponding Author
Shierel Fabia Vallesteros

Institutions
College of Forestry, Nueva Vizcaya State University Bayombong, Nueva Vizcaya 3700
sfvallesteros[at]gmail.com

Abstract
Gmelina (Gmelina arboreaRoxb.) is the most widely planted tree species in Nueva Vizcaya province in the Philippines. Its role in local wood supply becomes more important as a consequence of the ban on harvesting naturally growing timber. More than 90% of the wood supply, based on reported transactions in 2013, is gmelina. Wood is coming from different planting configurations such as solitary trees, homegardens, road sides, riparian strips, small stands, and large plantations. While gmelina appears to the most important tree in meeting local demand for wood, the yield per hectare is low due to poor tree management and mismatch between species and site. Survey results indicate great potentials for tree improvement with effort coming from the tree owners themselves and supported by scientific approach in tree improvement. As one of the initial steps, research on ideotype, or conceptual model of an ideal plant, promises to play a key role. The study worked on gmelina timber ideotype. Between-tree-traits relationships were investigated in order to see what traits might be subjected for simultaneous improvement. Many significant relationships came out that would lead to defining the desired tree forms. Not a single form shall come out as combination of traits may result in increased in wood yield in tree or stand.

Keywords
Traits; timber ideotypes; Gmelina arborea

Topic
AGRO FORESTRY AND BIODIVERSITY

Link: https://ifory.id/abstract/bgEhXZAye8vW


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