Judul: Aspek Biologi Reproduksi Ikan Lemuru (Sardinella longiceps C.V.) di Perairan Teluk Sibolga, Sumatera- Utara
Abstrak: Ikan lemuru (Sardinella longiceps C.V.) merupakan ikan ekonomis penting Saat ini informasi biologis ikan lemuru di perairan Sibolga belum ada. Informasi tersebut dibutuhkan untuk tujuan pengelolaan kegiatan perikanan di wilayah tersebut. Penelitian bertujuan untuk mengetahui aspek biologi reproduksi ikan lemuru (Sardinella longiceps C.V.).
Keyword: 

Judul: Biologi reproduksi Ikan Lemuru (Amblygaster sirm Walbaum,1792) di perairan Selat Sunda
Abstrak: Ikan lemuru (Amblygaster sirm) merupakan bagian dari ikan pelagis kecil yang tertangkap menggunakan purse seine di perairan Selat Sunda, namun belum diketahui dengan memadai aspek biologinya. Tujuan dari penelitian ini yaitu mengkaji beberapa aspek biologi reproduksi yang mencakup rasio kelamin, ukuran pertama kali matang gonad (Lm), musim pemijahan, tipe pemijahan dan potensi reproduksi. Penelitian ini berdasarkan data primer yang dilaksanakan pada bulan April-Agustus 2015 dengan waktu pengambilan contoh dilakukan setiap 30 hari sebanyak lima kali. Jumlah ikan lemuru yang diambil selama penelitian sebanyak 255 ikan betina dan 536 ikan jantan. Hasil penelitian ini menunjukkan bahwa rasio ikan lemuru tidak seimbang (rasio jantan dan betina sebesar 2:1). Hasil analisis ukuran pertama kali matang gonad ikan betina dan jantan masing-masing adalah 186 mm dan 188 mm. Musim pemijahan ikan lemuru terjadi pada bulan Mei sampai Agustus dengan puncak pemijahan pada bulan Juli, dan tipe pemijahan terindikasi bersifat partial spawner. Potensi reproduksi ikan lemuru dapat dikategorikan cukup tinggi dengan kisaran fekunditas 3 600-42 390 butir.
Keyword: reproductive biology, spotted sardinella, Sunda Strait

Judul: Hybrid solar cells of ZnO nanoparticles/chlorophyll was modified metal ions (Zn2+ and Cu2+ )
Abstrak: Zinc Oxide (ZnO) is a n-type semiconductor with a wide the energy band (Band Gap) is 3.37 eV at room temperature and 3.34 eV at low temperature with a large exiton binding energy is 60 meV. ZnO has been synthesized by hydrothermal method, resulting in a decrease in particle size over the duration of the hydrothermal changes. Crystallographic structure of ZnO were characterized using XRD, has shown the characteristic pattern of a hexagonal wurtzite structure, the crystallite size increases to changes in particle size. Changes in particle size has also led to a change in the absorption peak of ZnO as has been demonstrated posted under test using the optical properties of UV-Vis spectrophotometer. Changes of this uptake has also led to changes in the energy band gap, which increases its band gap energy of the particle size. In electronic applications, especially in solar cells. Chlorophyll is considered less effective, because of their very nature are easily degraded as a result of several reactions which are acid, lighting and temperature. The results of the stability test using a halogen lamp 34 W/m2 for 5 hours, that the substitution of chlorophyll with metal ions Zn2+ and Cu2+ has been shown to form more stable than natural chlorophyll. The characterization of the optical properties, the combination of ZnO / chlorophyll in the form of hybrid films has led to a shift in the absorption region of ZnO becomes more widely from the UV to Visible. ZnO/chlorophyll has absorption range of 350-515 nm, ZnO / Zn-feofitin 332-401 nm and 332-632 nm for Cu-feofitin. The combination of ZnO/chlorophyll and CuSCN as a solid electrolite in hybrid solar cell, a modified chlorophyll with metal ions Zn2+ and Cu2+ has been shown to form a more stable I-V curve. It is characterized by its fill factor value greater than natural chlorophyll. Nevertheless, solar cells with natural chlorophyll has been able to produce higher efficiency values of chlorophyll were substituted.
Keyword: Hydrothermal, ZnO/Chlorophyll modified, Hybrid Solar Cell