Evaluation of biochemical and physiological changes in seeds of Jatropha curcas L. Under natural aging, accelerated aging and saturated salt accelerated aging

Indonesia memiliki banyak tanah masam, tetapi penggunaan masih sangat sedikit karena kandungan nutrisi tanah masam rendah. Sementara itu, jarak pagar merupakan tanaman yang dapat tumbuh di berbagai jenis tanah (termasuk lahan marjinal) dan penggunaannya sebagai bahan baku biodiesel. Oleh karena itu, perlunya penelitian mengenai pertumbuhan jarak pagar pada tanah masam sebagai upaya untuk mengembangkan jarak pagar dan penggunaannya di Indonesia.Untuk memulai upaya, penelitian tentang berbagai genotipe jarak pagar di tanah masam telah dilakukan. Tujuan dari penelitian ini yaitu mempelajari genotipe jarak pagar yang berpotensi untuk tanah masam. Penelitian ini dilakukan di UPTD Pengembangan Teknologi Lahan Kering Singabraja, Kecamatan Tenjo, Bogor, Jawa Barat, dari November 2010-Agustus 201. Penelitian ini menggunakan Rancangan Kelompok Lengkap Teracak (RKLT) dengan satu faktor yaitu genotipe. Hasil penelitian menunjukkan berbagai perbedaan pada pertumbuhan diantara genotipe-genotipe jarak pagar. Secara umum, ada lima genotipe jarak pagar yang terbaik di tanah masam (pH 5.0) yaitu Medan I-5-1, Dompu, IP-2P-3-4-1, Sulawesi, dan Bima M.

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Alteration in chemical composition and antioxidant defense potential of essential oil of Jatropha curcas L. grown in fly ash-amended soil

Energy Ecology and Environment ◽

10.1007/s40974-021-00210-9 ◽

2021 ◽

Author(s):

Akshita Chhabra ◽

Vijay Bharath Velvijayan ◽

Sumedha Mohan ◽

Praveen Dahiya

Keyword(s):

Fly Ash ◽

Chemical Composition ◽

Essential Oil ◽

Jatropha Curcas ◽

Antioxidant Defense ◽

Jatropha Curcas L ◽

Amended Soil

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Accelerated Aging of Deacidified and Untreated Book Paper in 1967 Compared with 52 Years of Natural Aging

Restaurator International Journal for the Preservation of Library and Archival Material ◽

10.1515/res-2020-0006 ◽

2020 ◽

Vol 41 (3) ◽

pp. 131-152

Author(s):

Tali H. Horst ◽

Richard D. Smith ◽

Antje Potthast ◽

Martin A. Hubbe

Keyword(s):

Room Temperature ◽

Accelerated Aging ◽

Natural Aging ◽

Scanning Electron Micrographs ◽

Surface Ph ◽

Room Temperature Storage ◽

Folding Endurance ◽

Endurance Tests ◽

Breaking Length ◽

Temperature Storage

AbstractThree copies of a book that had been optionally deacidified using two different procedures in 1967, and then subjected to accelerated aging, were tested again after 52 years of natural aging. Matched copies of the book Cooking the Greek Way, which had been printed in Czechoslovakia on acidic paper, were evaluated. Nonaqueous treatment of two of the copies with magnesium methoxide dissolved in chlorofluorocarbon solvent had been found in 1967 to have decreased the susceptibility to embrittlement, as evidenced by the results of the accelerated aging, followed by folding endurance tests. Retesting of the same books in 2019, after 52 years of room temperature storage, showed that the deacidification treatments had achieved the following benefits in comparison to the untreated book: (a) higher brightness; (b) higher folding endurance; (c) tensile breaking length higher in the cross-direction of the paper; (d) substantial alkaline reserve content, (e) an alkaline surface pH in the range 7.1–7.4, and (f) higher molecular mass of the cellulose. Remarkably, some of the folding endurance results matched those of unaged samples evaluated in 1967. Scanning electron micrographs showed no differences between the treated and untreated books.

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