PERBEDAAN SIFAT PEMESINAN KAYU TIMO (Timonius sericeus( ABSTRAKSifat pemesinan merupakan salah satu parameter untuk menentukan kualitas kayu. Pengujian terhadap sifat pemesinan kayu penting dilakukan untuk mengetahui tingkat kemudahan pengerjaannya sebagai bahan baku industri mebel/furniture, kayu kontruksi maupun produk-produk kayu lainnya. Penelitian ini bertujuan untuk mengetahui perbedaan sifat pemesinan kayu timo (Timonius sericeus (Desf) K. Schum.) dan kabesak (Acacia leucophloea (Roxb.) Willd.) yang berasal dari Desa Reknamo, Kabupaten Kupang, Nusa Tenggara Timur. Pengujian dilakukan menurut metode ASTM D1666. Adapun sifat-sifat pemesinan yang diuji meliputi: pembentukan, penyerutan, pengampelasan, pengeboran dan pembubutan. Pengamatan terhadap mutu hasil pemesinan dilakukan secara visual dengan menghitung persentase cacat yang timbul pada permukaan contoh uji setelah proses pemesinan, kemudian diklasifikasikan kualitasnya ke dalam lima kelas mutu. Hasil penelitian menunjukkan bahwa kayu timo dan kabesak mempunyai sifat pemesinan yang sangat baik, termasuk kelas I. Adapun perbedaan yang signifikan antara kedua kayu tersebut adalah pada sifat pengampelasan, dimana rata-rata bebas cacat kayu timo 85% sedangkan kabesak 84,5%. Kedua kayu tersebut cocok digunakan sebagai bahan baku produk mebel dan moulding.Kata Kunci: Sifat pemesinan, kayu timo, kayu kabesak, Nusa Tenggara Timur ABSTRACT Machining properties is one of the parameters to determine the quality of the wood. Tests on machining properties of wood are important to know the easiness level of workmanship as raw materials of furniture industry, construction wood and other wood products. This research was aimed at determining the difference of machining properties between timo wood (Timonius sericeus (

On Timor island, Nusa Tenggara Timur, faloak barks (Sterculia quadrifida R.Br.) has been used empirically to restore stamina. Faloak bark ethanolic extract proved to have immunomodulatory activity in vitro, which can increase macrophage phagocytosis activity. This research aimed: (i) to determine the immunomodulatory active fraction of faloak bark ethanolic extract, (ii) to determine the total flavonoid contents of faloak extract and fractions, and (iii) to evaluate the correlation of the total flavonoid contents of those extract and fractions with their macrophage phagocytosis activity. The simplisia powder is macerated with 96% ethanol. The extract was dissolved in methanol:water (9:1v/v) was then subsequently partitioned with n-hexane, ethyl acetate, and water to obtain n-hexane fraction, ethyl acetate fraction, water fraction, and insoluble fraction. Faloak extract and fractions at concentration 62,5; 125; 250; 500μg/mL were tested for their effect on the peritoneal macrophage phagocytosis of Balb/c mice in vitro by the latex beads method. Phagocytosis capacity and phagocytosis index were analyzed using one-way anova and post hoc Tukey HSD test with 95% confidence level. The results showed that ethyl acetate fraction had the highest macrophage phagocytosis capacity and the highest total flavonoid content compared to other fractions. The highest macrophage phagocytosis capacity of ethyl acetate fraction at concentration of 250 μg/mL was 51,94±4,67%, this value was significantly different from cell control (7,50±1,29%), negative controls of 0,0625% dimethylsulphoxide (6,25±0,36%), as well as positive control of 200 μg/mL echinaceae extract syrup® (9,97±0,33%). The total flavonoid content of ethyl acetate fraction determined by aluminum chloride method was 4,290±0.029 mg of quercetin equivalent/g fraction. There was a positive and strong correlation between the total flavonoid content of these extract and fractions with their macrophage phagocytosis capacity (Pearson correlation coefficient of 0,781) and showing linear relationship y=4,721x+19,663; R2=0,61.

This study aims to determine the effect of the application of the Search, Solve, Create, and Share (SSCS) learning model to the mathematical reflective thinking skills and the students' mathematical problem-solving abilities. This research is a type of Quasi-Experimental Design research with a 2x2 factorial research design. Data collection techniques in this study in the form of documentation and tests at Private school in Bandar Lampung with 28 students of experiment classes and 28 students of control classes. Data analysis techniques used are the normality test and homogeneity test. Testing the hypothesis in this study using the Multivariate Analysis of Variance (MANOVA) test. Based on the results of the study, The calculation of the MANOVA test, it was concluded that there was an influence on the application of the SSCS learning model to students' mathematical reflective thinking skills. The application of the SSCS learning model to the mathematical reflective thinking ability has an influence percentage of 91.9%. The application of the SSCS learning model to mathematical reflective thinking skills and mathematical problem solving abilities has a relatively high level of effectiveness.

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