Judul: Usaha penanggulangan mastitis pada sapi perah yang disebabkan oleh escherichia coli (Coliform Mastitis)
Abstrak: Usaha penanggulangan mastitis merupakan tantangan yang besar. Walaupun langkah-langkah praktis untuk pengawasan mastitis telah dikembangkan, namun langkah-langkah tersebut kurang efektif untuk melawan coliform-mastitis, terutama yang disebabkan oleh Escherichiau.
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Judul: Mastitis infeksi oleh Echerichia coli dan gram negatip
Abstrak: Mastitis atau radang ambing merupakan suatu penyakit yang disebabkan oleh berbagai faktor, yang mempunyai tingkat kerusakan yang berbeda-beda serta berlangsungnya cukup ber- variasi hingga dapat berjalan residiva. Penelitian ini merupakan suatu inventarisasi bakteri Escherichia coli dan bakteri Gram Negatip lainnya, didalam kaitannya sebagai penyebab Mastitis. Ternak yang diteliti adalah sapi perah Frisien Holstein (FH) yang sedang laktasi berjumlah 145 ekor dan yang berpro- duksi menurun sebanyak 25 ekor. Lokasi peternakan di kecama- tan Beji-Depok dan Cisarua, kabupaten Bogor. Diagnosa terhadap Mastitits, baik untuk Mastitis Klinis maupun Mastitis Subklinis berdasarkan pengamatan/ inspeksi secara umum dan uji alkohol 70% pada contoh/ sampel air susu lapangan, selanjutnya diuji secara laboratoris. Dari 100 kuartir yang diuji diperoleh : 8 isolat (8%) Escherichia coli; 3 isolat (3%) Enterobacter aerogenes; 2 isolat (2%) Citrobacter sp.; 3 isolat (3%) Shigella sp. dan 13 isolat (13%) Alcaligenes fecalis.
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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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