Judul: Identification of Subterranean Termites and Their Attack Characteristics on Settlements in DKI Jakarta Province
Abstrak: Serangan rayap pada bangunan semakin meningkat seiring dengan perkembangan pembangunan di Provinsi DKI Jakarta yang banyak mengubah kondisi lingkungan alaminya. Tujuan penelitian ini adalah untuk mengidentifikasi spesies rayap tanah yang menyerang bangunan gedung permukiman serta menganalisis karakteristik serangan rayap di Provinsi DKI Jakarta. Penelitian dilakukan pada 57 lokasi permukiman di Provinsi DKI Jakarta. Penentuan lokasi penelitian berdasarkan hasil survei kerusakan bangunan akibat serangan rayap dan kegiatan pemantauan aplikasi pengumpanan oleh PT Larusa Adi Sumindo selama empat bulan (September 2021-Desember 2021). Hasil identifikasi morfometri rayap ditemukan sekurang-kurangnya empat spesies rayap tanah yang menyerang bangunan yaitu Coptotermes curvignathus, Coptotermes gestroi, Macrotermes gilvus, dan Microtermes insperatus. Rayap C. gestroi merupakan spesies yang paling banyak ditemukan, yaitu di 39 lokasi. Hasil penelitian menunjukkan bahwa kerusakan komponen bangunan akibat serangan rayap dengan persentase tertinggi yaitu kusen jendela dan pintu (49,1%) dan terendah yaitu pondasi (3,5%)
Keyword: DKI Jakarta, building damage, morphometry, settlement, subterranean termites

Judul: Frekuensi dan Intensitas Serangan Rayap Tanah pada Bangunan Gedung milik Pemerintah Provinsi DKI Jakarta.
Abstrak: Jakarta is a province with the most developed infrastructure in Indonesia, including its building constructions. However, termites attack were often found on the buildings in this region. This study was conducted to investigate the frequency and intensity of termites attack on Jakarta Government’s buildings. The targeted buildings in this research were selected by four stage stratified random sampling technique. Termites speciemens were collected from attacked buildings, then identified according to (Ahmad 1958). The results of this research showed that the frequency of termites attack on Jakarta Government’s buildings reaches 16.67% with the degree of infestation could classified as light infestation. Compared to other building components, windows sills has the highest termites attack rate (14.58%), followed by door sills (8.34%), and roof truss (4.16%). In addition, Microtermes inspiratus Kemner (Isoptera: Termitidae) have been found as the most frequent termite species attacking the buildings in Jakarta Province with infestation frequency reaches 77.8%, followed by Coptotermes curvignathus Holmgren (Isoptera: Rhinotermitidae) with infestation frequency of 22.22%. The highest intensity of termites attack occurred in Cililitan Village, Subdistrict Kramat Jati, East Jakarta.
Keyword: buildings, Jakarta, termites

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