Judul: A study of hardwood regeneration in the roanoke river bottomlands
Abstrak: The largest acreages of high-quality bottomland hard- woods in North Carolina are located along the Roanoke River below the Lake Gaston Reservoir. The natural water flow regime of this area has been altered by flood control and hydro-electric power operations. Periodic flooding occurs at unnatural intervals out of phase with the establishment of natural regeneration of forest trees. This study is part of a general appraisal of flooding damage and covers the three major timber types found along the Roanoke River; namely, tupelo-cypress swamps, ashpecan flats, and sweetgum terraces. Nine deer exclosures were constructed to differentiate inundation damage and the deer- browse damage in three major types at three different sec- tions of the river. Nine milacre plots were established inside each exclosure and twelve plots outside the exclosure in which seedlings were tallied by species, number, and height. To compare reproduction to planted stock, nursery-grown seedlings were planted in the corners of the tupelo-cypress and sweetgum milacre plots. Three soil samples were taken at two locations at each exclosure to determine soil charac- teristics.
Keyword: Hardwood, Bottomland

Judul: Pengaruh Penjarangan dan Pelebaran Jarak Naungan terhadap Sifat Dasar Kayu Meranti Merah
Abstrak: Endeavor to increase the growth rate of red meranti (Shorea leprosula Miq.) in natural forest has been carried out through the silviculture system of selective cutting and line planting (TPTJ). Even though high growth rate has been understood tend to decrease certain basic properties of wood; however measurement of the basic properties specifically done on the red meranti resulted from thinning and line planting treatment has been lacking. In the present research, measurement of the basic properties of red meranti resulted from thinning and line planting treatment was done. It was found that thinning and increasing line planting increased the diameter of tree, longitudinal shrinkage, fiber diameter, lumen diameter, sapwood extractives, and ash content. On the other hand, these treatment decreased heartwood proportion, crown coverage, specific gravity, wood density, radial and tangential shrinkage, fiber length, cell wall thickness and heartwood extractives. Lignin, holocellulose, -cellulose and hemicelluloses were not significantly influenced by the treatments.
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Judul: Katalis Zink Ferit Tersubstitusi Cu untuk Oksidasi Benzil Alkohol
Abstrak: Katalis berperan dalam menurunkan energi aktivasi. Katalis ZnFe2O4 dan ZnFe2O4 tersubstitusi Cu disintesis menggunakan metode kopresipitasi untuk digunakan dalam oksidasi benzil alkohol. Katalis dicirikan dengan spektrofotometer inframerah (FTIR) dan difraktometer sinar-X. Spektrum FTIR menunjukkan puncak serapan dari ikatan Zn-O dan Fe-O masing-masing pada rentang 559‒575 cm-1 dan 419‒447 cm-1. Difraktogram menunjukkan terbentuknya fase tunggal Zn0.6Cu0.4Fe2O4 pada katalis ZnFe2O4 tersubstitusi Cu 20%. Benzil alkohol dioksidasi dengan sistem refluks. Konversi benzil alkohol meningkat dengan meningkatnya suhu. Kadar benzaldehida yang dihasilkan dengan katalis ZnFe2O4 tersubstitusi Cu 20% lebih tinggi dibandingkan dengan katalis ZnFe2O4 yang tidak tersubstitusi dan yang tersubstitusi Cu 60 dan 80%. Hal tersebut menunjukkan bahwa katalis ZnFe2O4 tersubstitusi Cu 20% memiliki kinerja yang lebih baik dalam oksidasi benzil alkohol menjadi benzaldehida dengan kadar benzaldehida 8.763%.
Keyword: Benzil alkohol, katalis, oksidasi, ZnFe2O4