Judul: Morphological Studies of the Stomach of Javan porcupine (Hystrix javanica).
Abstrak: Penelitian ini bertujuan memberikan data morphology dan morphometry lambung landak Jawa (Hystrix javanica). Sampel yang digunakan adalah dua organ lambung landak Jawa. Pengamatan organ lambung dilakukan secara makroskopis dan mikroskopis. Lambung landak Jawa berbentuk seperti huruf C terbalik dengan ukuran kurvatura minor sangat pendek dan kuvatura mayor yang relatif panjang. Panjang kurvatura mayor lambung landak Jawa adalah 25.25±2.55 cm dan kurvatura minor adalah 1.7±0.2 cm. Bagian fundus berbentuk seperti kantong buntu yang dinamakan fundic caecum. Pada hubungan antara pilorus dan duodenum terdapat lapisan otot tebal di daerah kurvatura mayor dan kurvatura minor yang dinamakan sphincter. Hasil pengamatan mikroskopis memperlihatkan bahwa mukosa lambung landak Jawa dilapisi oleh epitel silindris sebaris dan ditutupi oleh lapisan mukus yang sangat tebal. Kelenjar lambung landak Jawa terdiri atas kardia, fundus, dan pilorus. Kelenjar kardia sangat sempit, sedangkan kelenjar fundus adalah kelenjar lambung yang sangat luas. karakteristik distribusi sel-sel kelenjarnya adalah sel chief sangat banyak ditemukan pada daerah fundic caecum, sedangkan sel parietal sangat banyak ditemukan pada daerah kurvatura mayor dan kurvatura minor. Perbatasan antara pilorus dan duodenum ditandai dengan adanya sphincter pilorus. Vili-vili usus yang mengandung sel goblet juga ditemukan pada mukosa duodenum. Namun kelenjar Brunner mulai ditemukan pada bagian proksimal duodenum, tidak pada batas antara pilorus dan duodenum.
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Judul: Anatomi Otot Daerah Panggul dan Paha Landak Jawa (Hystrix javanica)
Abstrak: This study was conducted to observe the anatomical structure of pelvic and thigh muscles in Javan porcupine included their origins and insertions in order to describe the possible functions of each muscles. This study used two specimen of adult male porcupines preserved in 10% formalin. Observations carried out by observing the outer morphology of pelvic and thigh regions. Determination of structures, origins, and insertions of each muscles was done by dissecting the superficial and deep layers and the muscles were named according to the Nomina Anatomica Veterinaria 2005. The muscles which found in pelvic and thigh regions were the cutaneous, psoas minor, iliopsoas (psoas major and iliacus venter lateral et medial), quadratus lumborum, tensor fasciae latae, gluteus superficialis, gluteus medius, piriformis, gluteus profundus, biceps femoris, abductor cruris caudalis, semitendinosus, semimembranosus, quadriceps femoris (vastus lateralis, rectus femoris, vastus intermedius, and vastus medialis), gemelli, obturatorius externus, obturatorius internus, sartorius, gracilis, pectineus, adductor longus, and adductor magnus et brevis. The results showed that Javan porcupine has unique structure of pelvic and thigh muscles that is the prominent of cutaneous muscle was extended up to the pelvic and thigh regions, the quadratus lumborum with two bellies, and the course of biceps femoris and semitendinosus which reached up to the sacrum and coccygeal regions. The structure of these pelvic and thigh muscles are sugested to be related with the adaptation and behavior of Javan porcupine during erecting the quills, rattling the tail quills, rushing enemies, and digging burrows.
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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