Perbedaan Hasil Belajar Kimia melalui Pembelajaran Kooperatif Tipe Buzz Group dengan Tipe Stad dalam Pokok Bahasan Ikatan Kimia pada Siswa Kelas X Sman 4 Pasangkayu

This research aimed to determine the differences in student outcomes that given cooperative model of Buzz group type with STAD type in students ofclass X SMA Negeri 4 Pasangkayu. Sample used consists of two classes, namely class XB as Buzz class group and class XA as STAD classes were determined by purposive sampling. Data collection was conducted using a test instrument, be in the form of student achievement test chemistry in the form (multiple choice) as many as 30 items. Testing research data using statistical analysis t test (right side) with the prerequisite test, test for normality, and homogeneity. In this research obtained the median of student learning outcomes using learning Buzz groupmodel was 19.56 while median of student learning outcomes with STAD cooperative model is 16.46. Based on statistical hypothesis testing with t test statistic (right) obtained values of thitung > ttabel was 1.771 > 1.67 with the degree of freedom = 0.05 and df = 59. The results showed that there was a difference in student learning outcomes using cooperative learning group Buzz type with student learning outcomes using STAD type cooperative

Pengaruh Pemberian Ekstrak Buah Kelor (Moringa Oleifera) terhadap Penurunan Kadar Kolestrol pada Darah Hewan Mencit (Mus Musculus)

This study aimed to identify bioactive compounds of moringa (moringa oleifera) extracts and determine the effective concentration on lowering blood cholesterol levels of mice. The animals used were 15 male mice induced by propylthiouracil and fat food diet. The mice were divided randomly into 5 groups with different treatment groups. The first, the second, and the third treatments were given moringa extracts each with a concentration of 10, 20% and 40%. The fourth treatment group was given food fat diet and propiltiorasil as a positive control, and the fifth treatment was given standard food and distilled water as a negative control. Data were analyzed using a statistical analysis of variance (ANOVA) test followed by Duncan test. The results showed that moringa fruit extract contains alkaloids, saponins, flavonoids, and tannins. Moringa fruit extract can lower blood cholesterol levels of mice with the most effective concentration of 10%

Analisis Peran Pemuda Terhadap Pembangunan Pertanian Lahan Pangan Berkelanjutan Di Kabupaten Labuhanbatu Utara

The agriculture development of progressive crop land consists of three significant factors such as human resources, natural resources and appropriate technology. The method used in the research is survey, a kind of research of which data is collected from samples over population to represent all population. The type of survey used is explanatory research, a kind of research means to explain the position of variables researched and the relation between a variable and another. The population of the research was all the youths in Labuhan batu Utara being 17-30 years old. According to BPS data in 2013, there were 46,091 youths in Labuhan batu Utara. Sampling used simple sampling random method where sample taken randomly from population based on the probability frequency of all the population's members. By using the formula of Frank Lynk, it was obtained 96 sample respondents. The conclusion of the research is 1) the youths' perception to the agriculture development of progressive crop land in Labuhanbatu Utara is positive, 2) the youths' role to the agriculture development of progressive crop land in Labuhanbatu Utara is positive and 3) the effect of the youths' role as the agent of change, the agent of development and the agent of modernization is simultaneously significant to the agriculture development of progressive crop land in all the aspects- human resources, natural resources and appropriate technology. Meanwhile the variable of the agent of modernization effects positively but is not significant to the agriculture development of progressive crop land

Uji Coba Mesin Pengering Kayu Kombinasi Tenaga Surya Dan Panas Dari Tungku Tipe I

Telah dilakukan uji coba teknis dan finansial terhadap mesin pengeringan kayu kombinasi tenaga surya dan panas dari tungku tipe SC+TI untuk kapasitas 19 m3 di salah satu industri/pengrajin kayu di Ngaringan, Grobogan, Jawa Tengah. Uji coba dilakukan terhadap kayu jati (Tectona grandis L.f.). Kebutuhan panas pengeringan di siang hari diperoleh dari tenaga surya dan di malam hari atau tergantung kebutuhan diperoleh dari tungku pembakaran dengan bahan bakar biomas/limbah kayu dari penggergajian sendiri. Tujuan uji coba adalah untuk mengetahui kelayakan teknis dan finansial dari pemanfaatan masin pengering tersebut.Hasil uji coba menunjukan suhu rata-rata harian dari panas surya yang diterima ruang pengering berkisar antara 40 - 50°C, sementara suhu untuk pengeringan kayu jati berkisar antara 45 - 70°C. Kekurangan panas diperoleh dari tungku bakar. Untuk mengeringkan sortimen kayu dengan kadar air 50% sampai mencapai kadar air 10% memerlukan waktu rata-rata 13 hari dan menghasilkan rendemen kayu kering sekitar 80%. Konsumsi limbah kayu untuk bahan bakar tungku pada setiap periode pengeringan 8 m3.Investasi pendirian unit pengeringan memerlukan biaya sebesar Rp 74.635.000. Biaya produksi setahun (jumlah produksi 304 m3) adalah Rp 3.251.548.750, sehingga harga pokok produk Rp 10.695.884/m3. Analisis kelayakan finansial pemanfaatan mesin pengering menunjukan dengan harga jual kayu jati kering Rp 11.000.000/m3. Titik impas (BEP) tercapai pada produksi sebesar 86,3 m3, Nilai sekarang neto (NPV) Rp + 374.245.458 dan Internal Rate of Return (IRR) 80%. Hasil ini menunjukkan bahwa mesin pengering tersebut layak untuk dioperasikan

Brown Root Rot Disease of Cashew in West Nusa Tenggara: Distribution and Its Causal Organism

Brown root rot disease is a major constraint on cashew plantation in Pekat District, West Nusa Tenggara. Its causal agent has not been characterized. This paper describes efforts to study the pathogen, distribution and loss. Field study was conducted in Pekat District in 2003. Laboratory experiments to isolate and test the causal agent were conducted in the Indonesian Spices and Medicinal Crops Research Institute, Bogor. Research results showed that the disease was found widespread in several villages in Pekat District, such as Pekat, Beringin Jaya, Sorinomo, and Nangamiro. Total number of died cashew trees was 1,075 equals to 5,106 kg kernel yield lost, worth Rp20.5 million. Infected trees showed leaf yellowing and defoliation leading to die. The lateral and taproots near collar were encrusted with gravel, earth, and brown mycelia sleeves. The fungus produced arthrospores and brown pigmentation on agar medium containing 0.05% gallic acid. An isolate of the fungus induced typical disease symptoms following inoculation on 5 month-old cashew seedlings. These results indicated that the causal agent of mass decline of cashew in Pekat District is Phellinus noxius. In field, the fungus also infects a barrier tree (Lannea coromandelica [Houtt.] Merr.) (Anacardiaceae), locally known as kedondong pagar or kayu Bantenan