Judul: Pengaruh Penambahan TiO2 pada Ciri Zeolit yang Disintesis dari Kaolin Alam.
Abstrak: Penelitian terdahulu menunjukkan bahwa sintesis nanokomposit zeolit/TiO2 secara hidrotermal dengan penambahan TiO2 sebelum kristal zeolit terbentuk, menghasilkan jenis zeolit sintetik yang berbeda-beda. Penelitian ini bertujuan mengamati pengaruh penambahan TiO2 pada ciri zeolit. Bahan dasar sintesis zeolit adalah kaolin alam dari Bangka Belitung. Nanokomposit zeolit/TiO2 disiapkan dengan nisbah metakaolin:TiO2 95:5%, 90:10%, 85:15%, dan 80:20% b/b pada suhu 100 ºC selama 24 jam dengan ragam konsentrasi NaOH 1.5, 2, dan 2.5N. Zeolit dan nanokomposit zeolit/TiO2 yang diperoleh dicirikan menggunakan difraksi sinar-X, spektrometer inframerah transformasi Fourier, dan mikroskop elektron payaran. Sintesis zeolit tanpa tambahan TiO2 menghasilkan zeolit A, sementara tambahan TiO2 menghasilkan zeolit tipe sodalit. Diamati juga bahwa NaOH memengaruhi derajat kristalinitas, dengan konsentrasi NaOH terbaik dalam sintesis zeolit dan nanokomposit zeolit/TiO2 sebesar 2N.
Keyword: hidrotermal, kaolin alam, nanokomposit, TiO2, zeolit

Judul: Sintesis Zeoli! X dan Nanokomposit ZeolitJTi02dari Kaolin serta Aplikasinya pada Adsorpsi Fotodegradasi Biru Metilena
Abstrak: Kaolin is rarely used as an adsorbent due to its low adsorption capacity. Therefore, kaolin was converted into zeolite and nanocomposite zeolitefri02. The products were then analyzed using x-ray diffraction and scanning electron microscope. The synthesized zeolite and nanocomposite were identified as zeolite A and zeolite X. The maximum adsorption capacity (Q) of zeolite and nanocomposite occured at the concentration of methylene blue at 300 mgIL with Q value of 17 mglg and 21 mg/g. The zeolite prepared using NaOH 2.5 I and aged at 24 hours had the highest Q value of 17 mg/g. The test results of their photodegradation properties indicate that the nanocomposite can degrade methylene blue at concentration 12.5 mg/L with percent degradation of 85.19%. The adsorption-photodegradation process of methylene blue was showed by the color of filtrate and precipitate the studied objects which were more pale than the color of control after UV irradiation at wavelength of 365 nm in 6 hours.
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Judul: Biology and Life Table of Fall Armyworm, Spodoptera frugiperda J.E. Smith (Lepidoptera: Noctuidae) on Babycorn
Abstrak: Biologi dan neraca hayati ulat grayak jagung, Spodoptera frugiperda J.E. Smith (Lepidoptera: Noctuidae) pada babycorn. Ulat grayak jagung, S. frugiperda merupakan hama asing invasif yang telah menimbulkan kerusakan berat pada tanaman jagung di Pasaman Barat, Sumatera Barat pada awal tahun 2019. Informasi mengenai biologi dan neraca hayati S. frugiperda di Indonesia masih terbatas. Penelitian ini bertujuan mengetahui biologi dan neraca hayati S. frugiperda yang dipelihara di laboratorium dengan pakan jagung semi. Larva tahap pertama (110) dipelihara secara individual pada wadah yang berisi babycorn sebagai pakan. Pengamatan dilakukan setiap hari samapi munculnya imago. Imago yang muncul dipasangkan dan dipelihara dalam kurungan yang terpisah. Pengamatan terhadap imago dilakukan setiap hari sampai imago mati. Data yang diperoleh yaitu data stadium, data pengukuran, dan data neraca hayati. Hasil penelitian menunjukkan bahwa rata-rata stadium dari telur, larva 6 instar, pra-pupa, dan pupa berturut-turut adalah 2.47, 14.96, 1.83, 9.75 (jantan), dan 8.81 (betina) hari. Rataan masa pra-oviposisi, oviposisi, pasca-oviposisi, lama hidup imago, dan siklus hidup berturut-turut, yaitu 1.60, 7.90, 2.27, 11.34 (jantan), 11.77 (betina), 37.69 (jantan), dan 37.70 (betina) hari. Telur yang diletakkan imago betina rata-rata sebanyak 1365.86 butir dengan persentase fertilitasnya sebesar 94.68%. Kurva kesintasan S. frugiperda adalah kurva sintasan tipe I, dengan laju reproduksi kotor (GRR) 1442.49 individu per generasi, laju reproduksi bersih (Ro) 1342.77 individu per induk per generasi, laju pertambahan intrinsik (r) 0.23 individu per induk per hari, rataan lama generasi (T) 31.23 hari, dan waktu yang dibutuhkan populasi untuk berlipat ganda (DT) adalah 3.01 hari., Biology and life table of fall armyworm Spodoptera frugiperda J.E. Smith (Lepidoptera: Noctuidae) on babycorn. The fall armyworm, S. frugiperda is an invasive pest that caused serious damage on corn in West Pasaman, West Sumatera, in early 2019. In Indonesia, research and information about this pest still limited. This research aimed to determine the biology and life table of S. frugiperda on babycorn under laboratory condition. First stage larvae (110) were reared individually in the petridish supplied babycorn as feed. Observation were conducted everyday until adult emergence. Emerging adults were paired and reared in separated cages. Observation of adults were conducted everyday until adult death. Results showed that mean developmental duration of egg, 6 instars larvae, pre-pupa, and pupa were 2.47, 14.96, 1.83, 9.75 (male), and 8.81 (female) days, respectively. The periode of pre-oviposition, oviposition, post-oviposition, longevity of adult, and life cycle were 1.60, 7.90, 2.27, 11.34 (male), 11.77 (female), 37.69 (male), and 37.70 (female) days. The average of the eggs laid by female was 1365.86 eggs and a fertility percentage was 94.68 %. The survival curve of S. frugiperda categorized as a type I, with the gross reproduction rate (GRR) of 1442.49 individual per generation, the net reproduction rate (Ro) was 1342.77 individual per female per generation, the intrinsic rate of increase (r) was 0.23 individual per female per day, the mean generation time (T) was 31.23 days, and the population doubling time (DT) was 3.01 days.
Keyword: babycorn, invasive species, life cycle, life table