Judul: Keanekaragaman Jenis Tumbuhan Bawah di Gunung Papandayan Bagian Timur, Garut, Jawa Barat.
Abstrak: Gunung Papandayan has the potential of various types of fauna and flora that has become the unity in its natural environment. The objectives of this research was to determine the composition, diversity and potential of undergrowth that are found in the eastern part of Gunung Papandayan. The total of undergrowth species on Gunung Papandayan approximately 101 species of 34 families. The level of undergrowth diversity on five sites varies with a value of highest H’ at Supabeureum (3.36), while Tegal Mariuk has the smallest value of H’ (2.40). The low level of vegetation dominance indicated that undergrowth in five sites spread on a lot of species. Undergrowth vegetation communities in five sites are differs with IS score was < 75 %. Undergrowth species which are found on Gunung Papandayan has potential as food, medicinal plants, ornamental plants, and livestock feed.
Keyword: undergrowth, Gunung Papandayan, diversity, analysis of vegetation

Judul: Komposisi Jenis dan Struktur Tegakan Hutan Terganggu di Gunung Papandayan, Garut, Jawa Barat
Abstrak: Growth process of forest community to reach balanced condition often undergoes disturbances which create destruction. Papandayan mountain has been known since Dutch colonial government as an area with very rich floristic composition. Research on species composition and stand structure of disturbed forest has never been conducted in this area. The objective of this study is to learn the species composition and stand structure of disturbed forest in Papandayan mountain, whose forests are disturbed both by human and by natural process. Research results show that biodiversity and species richness in sites disturbed by human are higher than those disturbed by nature. Besides that, forest crown stratification pattern in disturbed forest shows that there is no any forest crown which reaches stratum A (>30 meter). They only reach stratum B (20–30 meter) and stratum C (4–20 meter). Crown stratification in disturbed forest never reached stratum A because stratum A constitutes the character of stable forest condition.
Keyword: stand structure, species composition, Papandayan Mountain, disturbed forest

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