Judul: Sifat-Sifat Kimia Air Hasil Pencucian Tanah Sulfat Masam Delta Telang. Musi Banyuasin. Sumatera Selatan Pada Berbagai Tlngkat Pengeringan
Abstrak: Water management is one way to overcome some problems that is faced in acid sulphate soil. The drainage will cause pyrite layer oxidized and released W, Fe3+ and SO4 2-, the soil acidity becomes lower. A high acidity will cause silicate mineral destroyed and released Al3+, K+, Na+, Ca2+, Mg2+ and Fe3+. Soil leaching makes poisonous elements decreasing, however the elements that are needed by plants are leached as well. It will raise new problem that is the decreasing of water quality because of the increasing soil acidity and toxic elements content, such as AI, Fe and S04 2- in water.
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Judul: Perubahan Beberapa Sifat Kimia Tanah Sulfat Masam Delta Telang, Musi Banyuasin, Sumatera Selatan Akibat Pengeringan Dan Pencucian
Abstrak: Acid sulphate soil having oxidized pyrite layer is hard to be used for agriculture. This soil has several ions namely H-, Fe2+, SO42- ,that may be toxic for plant if they are in a large amount or high concentration, which happen when pyrite oxidized. A high acidity caused by pyrite oxidized will increase Al3+ and Mn2+ solubility. The high concentration of toxic ions is the main problem at actual acid sulphate soil. This problem can be solved by leaching methode.
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Judul: Pengukuran Jantung Kelinci New Zealand White (Oryctolagus cuniculus) dengan Radiografi Toraks
Abstrak: This research was conducted to evaluate radiographs heart size of anaesthetized New Zealand White rabbits (Oryctolagus cuniculus) under different combination of ketamine and xylazine. The rabbits were divided into three groups. Group A were anaesthetized using a 35 mg/kg and 5 mg/kg combination of ketamine and xylazine (n=5). Group B were anaesthetized using a 40 mg/kg and 5 mg/kg combination of ketamine and xylazine (n=3) while group C were anaesthetized using 45 mg/kg and 5 mg/kg combination of ketamine and xylazine (n=3). Parameter of observation from left laterolateral view were: 1) the apicobasilar length of the heart (AB), 2) the width of the heart (CD), 3) the distance between the cranial edge of the fifth rib and the caudal edge of the seventh rib perpendicular to the spine (R5-7), and 4) the vertical depth of the toraks (H). Parameter of observation from dorsoventral view were: 1) the length of the heart (L), 2) the width of the heart (W), and 3) the width of the thorax (T). The result from the heart parameters observation that were measured in left laterolateral view and dorsoventral view shows theres no significantly differ among the groups (P > 0.05). The vertebrae heart size (VHS) values obtained from the sum of the length of the long and the short axes on left laterolateral view. The long axes mean values (A) were 4.35±0.26 v and the short axes mean values (B) were 3.59±0.30 v, therefore VHS mean values were 7.94±0.49 v. On the dorsoventral view, the length of the heart mean values (L) were 4.32±0.29 cm, the width of the heart mean values (W) were 3.33±0.26 cm, and the width of the thorax mean values (T) were 5.85±0.30 cm. In normal conditions, the width of the heart should be less than two-thirds the width of the thorax and values obtained of 3.33<3.72 it shows that the heart is in the normal range. The best ratio to calculated the normal heart dimension in the left laterolateral view was compared the long axes with the vertical depth of the thorax, whereas in dorsoventral view, the length of the heart was compared with the width of the heart.
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