Judul: Analisis peramalan kebutuhan dan distribusi pupuk pada setiap kecamatan di Kabupaten Karawang
Abstrak: Daerah Khatulistiwa merupakan daerah sangatsesuai untuk kegiatan usaha pertanian. Sektor pertanian meliputi pertanian, peternakan, kehutanan dan perikanan merupakan kegiatan yang banyak berperan. Beberapa propinsi di Pulau Jawa merupakan daerah penghasil padi terbesar di Indonesia lndramayu, Karawang dan Subang merupakan tiga kabupalen lerbesar penghasil padi di Jawa Bam Karawang merupakan daerah yang dikenal sebagai Surplus beras karena padi yang dibasilkan dapat memenuhi kebutuhan lokal dan dapat dikirim ke luar daerah Karawang. Sehagian besar lahan di Karawang banyak digunakan untuk pertanian. Karawang memiJiki 175.327 Ha lahan dan 52, 92 persegi digunakan untuk lahan sawah. Kabupaten Kawarang merupakan penghasil padi terbesar kedua setelah lndramayu, dengan jumlah produksi sebesar 962.424 Ton dan memberi kontribusi sebesal 10,02 perse:n terbadap total produksi di Jawa Barat. …
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Judul: Analisis peramalan kebutuhan dan distribusi pupuk pada setiap kecamatan di Kabupaten Karawang
Abstrak: Daernh Khatulistiwa merupakan daerah sangal sesuai unluk kegiatan usaha pertanian. Sektor pertanian meliputi pertanian, peternakan, kehutanan dan perikanan merupakan kegiatan yang banyak berperan. Beberapa propinsi di Pulau Jawa merupakan daerah penghasil padi terbesar di Indonesia lndramayu, Karawang dan Subang merupakan tiga kabupalen lerbesar penghasil padi di Jawa Bam Karawang merupakan daerah yang dikenal sebagai SUIplus beras karena padi yang dibasilkan dapat memenuhi kebutuhan lokal dan dapat dikirim ke luar daerah Karawang. Sehagian besar lahan di Karawang banyak digunakan untuk pertanian. Karawang memiJikj 175.327 Ha laban dan 52, 92 peISCll digunakan untuk laban sawah. Kabupaten Kawarang merupakan penghasil padi terbesar kedua setelah lndramayu, dengan jumlah produksi sebesar 962.424 Ton dan memberi kontribusi sebesal 10,02 perse:n terbadap lotal produksi di Jawa Barat ...
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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