Judul: Uji Kemampuan Infusa Kayu Secang (Caesalpinia sappan L.)  sebagai Sediaan Analgesik pada Mencit (Mus musculus)
Abstrak: Pain becomes an unpleasant thing for everyone who feels it. With the development of the times, there are more people who use herbal plants as an alternative medicine. Sappan wood is one of the herbal plants which has analgesic properties. This research aims to investigate the effectiveness of sappan wood infusion as an analgesic in various doses in mice. Analgesic effectiveness test was carried out using the hot water immersion tail-flick test method. For the purpose of the study, it uses 25 male mice which were the negative control group, positive control group, infusion of sappan wood at doses of 1, 3, and 5 g/kg BW. Each experimental group consisted of 5 mice. The collected data were analyzed using analysis of variance (ANOVA) and continued with the Tukey test. The results showed that the infusion of sappan wood was able to provide an analgesic effect at the most effective dose at a dose of 1 g/kg BW. Compound in sappan wood that act as analgesics are flavonoids, alkaloids, and saponins. The conclusion of this study is that the infusion of sappan wood can be used as an alternative for safe and inexpensive analgesic preparations. Keywords: analgesic, herbal medicine, infusion, mice, sappan wood, Nyeri menjadi suatu hal yang tidak menyenangkan bagi setiap orang yang merasakannya. Semakin berkembangnya zaman, masyarakat semakin banyak memanfaatkan tanaman herbal sebagai pengobatan alternatif. Kayu secang merupakan salah satu tanaman herbal yang memiliki khasiat sebagai analgesik. Penelitian ini bertujuan untuk mempelajari efektivitas infusa kayu secang sebagai analgesik dalam berbagai dosis pada mencit. Uji efektivitas analgesik dilakukan melalui metode hot water immersion tail-flick test. Penelitian menggunakan 25 ekor mencit jantan yang dikelompokkan menjadi kelompok kontrol negatif, kontrol positif, infusa kayu secang dosis 1, 3, dan 5 g/kg BB. Setiap kelompok percobaan terdiri atas 5 ekor mencit. Hasil perolehan data dianalisis menggunakan analysis of variance (ANOVA) dan dilanjutkan dengan uji Tukey. Hasil penelitian menunjukkan bahwa infusa kayu secang mampu memberikan efek analgesik pada mencit dengan khasiat paling efektif pada dosis 1 g/kg BB. Senyawa dalam kayu secang yang berperan sebagai analgesik adalah flavonoid, alkaloid, dan saponin. Kesimpulan dari penelitian ini adalah infusa kayu secang mampu digunakan sebagai alternatif sediaan analgesik yang aman dan murah. Kata kunci: analgesik, infusa, kayu secang, mencit, obat herbal
Keyword: analgesik, infusa, kayu secang, mencit, obat herbal, analgesic, herbal medicine, infusion, mice, sappan wood

Judul: The Potential of Secang Wood (Caesalpinia sappan L.) Infusion as a Body Stamina Stimulator in Mice (Mus musculus)
Abstrak: Pemanfaatan tumbuhan sebagai obat herbal telah dilakukan turun-temurun untuk menyembuhkan penyakit ataupun menjaga kebugaran tubuh. Salah satu pemanfaatan tumbuhan sebagai obat herbal adalah obat stimulator stamina. Penelitian ini bertujuan untuk menguji efektivitas infusa kayu secang sebagai stimulator stamina dan pengaruhnya terhadap fisiologis tubuh. Uji stimulator stamina infusa kayu secang dilakukan pada 20 ekor mencit jantan dengan menggunakan metode swimming endurance. Mencit dikelompokkan menjadi lima kelompok perlakuan yakni satu kelompok kontrol negatif (perlakuan akuades), satu kelompok kontrol positif (perlakuan kafein 6,5 mg/kg BB), dan tiga kelompok perlakuan yang diberi infusa kayu secang dengan dosis masing-masing 1, 3, dan 5 g/kg BB. Data yang diperoleh dianalisis menggunakan uji statistik t - Student dan uji non-parametrik Kruskal-wallis yang dilanjutkan dengan uji Dunn. Hasil penelitian menunjukkan bahwa infusa kayu secang efektif meningkatkan stamina pada dosis 1 g/kg BB dengan total kemampuan berenang sebesar 732 detik. Efek peningkatan stamina ini terbedakan secara signifikan pada menit ke-30 waktu pengamatan. Ketiga dosis infusa kayu secang meningkatkan ketahanan berenang mencit yang setara dengan mencit kontrol positif dan lebih tinggi secara nyata dari mencit kontrol negatif. Infusa kayu secang juga ditemukan tidak mempengaruhi fisiologis tubuh mencit secara signifikan yang ditunjukkan dengan suhu tubuh, frekuensi napas, dan frekuensi denyut jantung dalam rentang normal. Oleh karena itu, dapat disimpulkan bahwa kayu secang memiliki efek stimulator stamina pada mencit terutama pada dosis 1 g/kg BB. Kata kunci: fisiologi, infusa, kayu secang, stamina, The use of plants as an herbal medicine to cure disease or maintain body fitness has been carried out for generations. One of the uses of plants as herbal medicine is stamina stimulator. This study aimed to examine the potential of herbal medicine from sappan wood infusion as a stamina stimulator and its effect on body physiology. The stamina test was carried out on 20 male mice using the swimming endurance method. The mice were divided into 5 grouped, namely one group of a negative control group (aquadest treatment), one group of a positive control group (caffeine 6,5 mg/kg BW treatment), and three treatment groups that were given sappan wood infusion at a dose of 1, 3, or 5 g/kg BW respectively. The data were analyzed by using the t-Student test and Kruskal-Wallis continued with Dunn's test. The results showed that the sappan wood infusion effectively increased the stamina at a dose of 1 g/kg BW with a total swimming endurance of 732 seconds. This effect was significantly different at the 30th -minute observation. The three doses of sappan wood infusion increased the mice’s ability to swim which was equal to positive control mice and significantly higher than negative control mice. The secang wood infusion also did not affect the mice’s physiology as indicated by body temperature, respiratory rate, and heart rate in the normal range. Therefore, it was concluded that sappan wood infusion has a stamina stimulator effect in mice, especially at a dose of 1 g/kg BW. Keywords: infusion, physiology, sappan wood, stamina
Keyword: Infusion, Physiology, Sappan wood, Stamina

Judul: Kajian Atmosfer Bawah Wilayah Tropis dan Subtropis
Abstrak: Planetary Boundary Layer is the lowest part of the atmosphere directly affected by the earth’s surface and responds to surface forcings within a time period of hourly to daily. The thickness of boundary layer varies over space and time, ranging from hundreds of meters to a few kilometers. The objective of this study consist of the analysis of Boundary Layer based on diurnal and nocturnal vertical profiles of meteorological properties and identification of characteristics pertaining to tropical atmosphere (represented by Soekarno-Hatta (6.110S, 106.650E), Polonia (3.560N, 98.680E), and Da Nang (16.030N, 108.200E) stations) and subtropical atmosphere (represented by Perth (31.930S, 115.960E), Nanjing (32.000N, 118.800E), and Hakasskaja (43.780N, 87.620E) stations). Virtual potential temperature, specific humidity, wind speed and direction, atmospheric stability, and Bulk-Richardson number are used to estimate the boundary layer thickness. Vertical profile of the virtual potential temperature and specific humidity are used to determine the Mixed Layer heights during the day and Residual Layer heights during the night. On the other hand, the mean value of Turbulent Flow Thickness is derived from the vertical profile of the Bulk-Richardson number (RiB). Analytical results of this study revealed that Mixed Layer height in the tropical atmosphere varies in a range from 260 m to 1410 m, Residual Layer height varies in a range from 267 m to 925 m, whereas the Turbulent Flow Thickness variation is confined between 0 m to 335 m. In subtropical atmosphere Mixed Layer height varies in a range from 101 m to 1483 m, Residual Layer height varies in a range from 121 m to 1276 m, whereas the Turbulent Flow Thickness variation is confined between 0 m to 769 m. This study also revealed that, except during summer, Mixed Layer Heights in the tropics are normally higher than in the subtropics.
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