Judul: Keanekaragaman udang air tawar di Danau Singkarak
Abstrak: Udang air tawar termasuk dalam subfilum Crustacea, ordo Decapoda, subordo Caridea. Udang air tawar memiliki peranan penting dalam perairan untuk menjaga kestabilan ekosistem. Penelitian keanekaragaman udang air tawar ini bertujuan untuk mendapatkan informasi mengenai jenis-jenis udang air tawar yang berada di Danau Singkarak. Sampling dilakukan pada dua habitat, yakni litoral dan tumbuhan air secara purposive sampling. Pengambilan sampel udang dilakukan dengan menggunakan alat hand net dan botol sampel. Identifikasi spesies dilakukan berdasarkan ciri morfologi (karapaks, rostrum, segmen abdominal dan pereiopod) mengikuti panduan kunci identifikasi udang air tawar serta identifikasi molekular menggunakan DNA barkode. Terdapat tiga spesies yang ditemukan di Danau Singkarak yaitu Macrobrachium horstii, Macrobrachium meridionalis dan Macrobrachium lanchesteri. Penelitian ini pertama kali melaporkan keberadaan ketiga spesies ini di Danau Singkarak. Macrobrachium lanchesteri merupakan spesies dengan jumlah paling banyak ditemukan.
Keyword: Diversity,, Macrobrachium, freshwater prawn, Singkarak Lake

Judul: Keanekaragaman Udang Air Tawar di Sungai Kampar Provinsi Riau
Abstrak: Udang air tawar merupakan anggota subfilum Crustacea, kelas Malacostraca, ordo Decapoda, infraordo Caridae, famili Palaemonidae, Atyidae dan Alpheidae. Genus Macrobrachium dari famili Palaemonidae memiliki persebaran paling luas di dunia. Lebih dari 240 spesies sudah terdeskripsi, 100 spesies diantaranya tersebar di Asia Timur dan Asia Tenggara (termasuk Indonesia). Penelitian ini bertujuan mengidentifikasi keanekaragaman udang air tawar di Sungai Kampar Provinsi Riau. Penelitian ini dilakukan pada lima stasiun di Sungai Kampar dengan metode convenience sampling. Setiap sampel difoto dan disimpan dalam alkohol 70% untuk selanjutnya diidentifikasi dengan buku identifikasi Freshwater Invertebrates of the Malaysian Region. Udang air tawar yang didapatkan sebanyak 119 individu. Sampel yang didapatkan merupakan famili dari Palaemonidae genus Macrobrachium yang terdiri dari tiga spesies, yaitu: Macrobrachium malayanum, Macrobrachium lanchesteri dan Macrobrachium rosenbergii. Spesies yang paling banyak ditemukan di lima stasiun penelitian adalah Macrobrachium lanchesteri.
Keyword: convenience sampling, Macrobrachium, Palaemonidae

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