Judul: Keanekaragaman Udang Air Tawar di Sungai yang Berhulu di Gunung Salak, Jawa Barat
Abstrak: Udang air tawar merupakan anggota Crustacea yang banyak ditemukan di seluruh dunia termasuk Indonesia. Udang air tawar yang paling banyak ditemukan di Indonesia ialah anggota famili Palaemonidae dan Atydae. Anggota famili Palaemonidae yang umum ditemukan yaitu dari genus Macrobrachium, sementara dari famili Atydae yaitu dari genus Caridina. Penelitian ini bertujuan mengeksplorasi kembali untuk mengetahui keanekaragaman udang air tawar di sungai Gunung Salak berdasarkan sebaran spasialnya. Metode yang digunakan pada penelitian ini yaitu purposive sampling dan road sampling yang di dasarkan pada kemudahan memperoleh data. Hasil penelitian yang dilakukan yaitu ditemukan 4 spesies udang air tawar, 3 dari genus Macrobrachium dan 1 dari Caridina. Spesies dari genus Macrobrachium yaitu M. pilimanus, M. sintangense, dan M. lanchesteri. Sementara dari genus Caridina yaitu Caridina propinqua. Keberadaan udang air tawar tidak dipengaruhi oleh faktor penghalang seperti bendungan, perumahan, jembatan, curug, dan kebun bambu, tetapi dipengaruhi oleh faktor ketinggian tempat.
Keyword: Faktor penghalang, Gunung Salak, keanekaragaman, ketinggian, udang air tawar

Judul: Keanekaragaman Jenis Udang Air Tawar di Sungai-Sungai yang Berasal dari Gunung Salak
Abstrak: Freshwater prawn is a crustacean that has an important role in maintaining the balance of freshwater ecosystems. Biodiversity of freshwater prawn research was conducted in the rivers where upstream on Salak Mountain, Bogor, West Java. This study was aimed to find out information on species biodiversity of freshwater prawn in rivers where come from Mount Salak. Sampling stations were 11 points in the rivers where upstream on Mount Salak by road sampling. There was three species of freshwater prawns, namely Macrobrachium lanchesteri (3 specimens), M. empulipke (6 specimens), and M. sintangense (50 specimens). M. sintangense, most commonly found species, mainly found in the slow water with mud substrate. M. empulipke found in rocky habitats with faster water flow, while M. lanchesteri alien species that was found in swift water stream. This species can survive in extreme conditions and could be a superior competitor for local spesies
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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