Judul: Aktivitas Ekstrak Etanol Daun Sirih Hijau (Piper betle Linn.) dalam Mempercepat Proses Persembuhan Luka pada Tikus
Abstrak: The aim of this study was to examine the activity of betel ethanol extract for abration skin wound healing process in Sparague-Dawley rats based on gross and microscopic observation (including histopatological and touch specimen). Under aseptic conditions four paravertebral full thickness skin incision performed on the back of 9 male rats. Every wounds were treated with different treatments. The treatments were control, placebo, commercial ointment, and extract betel. Histopatological section from tissue specimens were stained by hematoxylin and eosin and evaluated on first seven days and second seven days after surgery. Touch specimens were stained by Giemsa and evaluated on fourth and tenth day after surgery. The parameters of histopatological are reepitelization, fibroblas, congestion, bleeding, scrab formation, infiltration of inflammatory cell, hair follicle formation, and edema. Afterward, the specimens were grouped in phase of wound healing. Specimens touch parameter was the presence of inflammatory cells. The data were presented descriptively as quantitative data. Macroscopic appearances show that diameter extensive of betel ethanol extract wounds were decrease faster than other treatments. Scoring results of wounds who treated with betel ethanol extract in first seven days and second seven days show that wounds have entered maturation phase compared to other treatment. The specimens touch show that wounds who treated with betel ethanol extract were presenting inflammatory cells in first seven days. The results of this study show that wounds who treated with betel ethanol extract were recover faster than other treatment.
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Judul: Aktivitas Ekstrak Etanol Daun Sirih Hijau (Piper betle Linn.) dalam Proses Persembuhan Luka Infeksi Staphylococcus aureus pada Tikus
Abstrak: This research was aimed to prove the wound healing activity of Piper betle leaves ethanol extract against Staphylococcus aureus infection in rat skin. Various parameters such as pathology anatomy, netrofil presence, and microscopic observation were studied to evaluate the wound healing activity of Piper betle. Nine rats Sprague Dawley strain were used through our the study and each rat was given four treatments. Treatments were control, commercial ointments, akuadest, and Piper betle leaves ethanol extract. The experiment were given for fourteen days. Each of rats was aseptically wounded with four wounds in 1x1 cm2 square shape at the back of rats. Every wound was spilled by Staphylococcus aureus at 1st, 4th, 7th, and 11th day. All data were analyzed with descriptive semiquantitative method. Scoring results show that the first week of wounds treated with piper betle leaves ethanol extract had shown proliferative phase, while the second week treated with betle leaves extract had shown maturation phase. Wound treated with Piper betle leaves extract were healed better than others in the first week. Bassed on the results, Piper betle leaves extract can be used to heal bacterial wound in the skin
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Judul: Analysis of Unequal Income Distribution with Cobb-Douglas Production Function
Abstrak: This paper studies the economic growth model by Moav (2002). Moav model shows the existence of unequal income distribution between low-income with high-income community. That kind of unequal income distribution is caused by uneven distribution of income. On this Moav model, there is one area called the threshold. Threshold becomes a benchmark to determining whether a society is categorized into low- or high- income community. The production function used in this paper is the Cobb-Douglas function. The dynamics of this model is described as difference equation of low-income, threshold, and high-income community. Simulation study on the model is carried out using Maple 13 and Mathematica 7.0 software. Overall, from the observed case, high-income community will reach a stable condition earlier, followed by the threshold, and then the low-income community.
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