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: Identifikasi Gangguan Ekosistem Hutan Gunung Papandayan di Garut, Jawa Barat
Abstrak: Gunung Papandayan is one of the active volcanoes in West Java and it is a conservation area consisting Nature Reserve and Nature Tourism Park. Therefore, the protection of Gunung Papandayan’s forest ecosystem is needed to be done so that the area can be well maintained. This study was conducted on the forest area which was disturbed by the eruption and also by human activities. The level of disturbance was determined by measuring the tree basal area with line plot method. The socio-economic data was collected from 5 villages which borders Gunung Papandayan. The result showed that the presence of disturbance in Gunung Papandayan. The disturbance was occurred by three factors, consisting natural such as eruption, human factor such as forest fires, illegal logging, and forest encroachment, and also accessibility. The level of forest disturbance on the area of eruption, forest fires and forest encroachment was categorized as high level; while at the illegal logging area was categorized as medium level.
Keyword: cause of disturbance, disturbance level, forest disturbance, Gunung Papandayan

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