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"The objective of this research is to investigate the effect of water deficit on the growth and yield of corn . The variety of corn used in this research was new and doesnt have market label. This research in conducted under plastic house on the experimental farm of Lampung University from August to October 2007..."

"Corn seed subsidy policy is one of the ministry of agriculture's development programs which was estabilished in 2006 and continued in 2008 . The aim of this policy is to increase area of hybrid corn, increase production and productivity, open job opportunity and improve farmer's income,acclerate the developmentof national corn seed industry, provide feed industry and raw material for food industry and support corn self-sufficiency program...."

"Mycotoxins wich are secondary metabolites of fungi contaminate agricultural products such as corn and have deleterious effects on human and animal...."

"Penelitian bertujuan untuk mengetahui pengaruh pemberian pupuk NPK BASF dan pupuk pelengkap cair T-N-F pada berbagai taraf perlakuan yang di laksanakan di Kebun Percobaan Fakultas Pertanian Universitas Pembangunan Panca Budi Medan....."

"Korosi merupakan salah satu permasalahan penting yang harus dihadapi oleh berbagai macam sektor industri di Indonesia. Korosi memberikan efek dari segi ekonomi maupun dari segi keselamatan kerja. Salah satu cara pencegahan dan pengendalian korosi adalah dengan penambahan inhibitor. Ubi Ungu sebagai bahan organik dapat dikembangkan sebagai inhibitor untuk mengurangi laju korosi untuk baja karbon rendah di lingkungan air laut. Ubi ungu diharapkan dapat dijadikan sebagai inhibitor yang bersifat aman, ramah lingkungan, serta bio-degradable dan juga dapat mengurangi penggunaan bahan sintetis. Metode kehilangan berat digunakan untuk menguji keefektifan ubi ungu sebagai inhibitor dengan variasi konsentrasi (2ml, 4ml, 6ml) dan lama perendaman selama 4 hari. Dalam penelitian ini dapat disimpulkan ubi ungu bekerja kurang baik baik dilingkungan air laut karena terjadi efisiensi yang didapat relative kecil sehingga kurang cocok digunakan sebagai inhibitor. Efisien rata-rata dari ke-3 konsentrasi tersebut diperoleh sekitar 13,20%, dengan maksimum nilai efisiensi terjadi pada konsentrasi 2ml yaitu sebesar 21,02%.

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Corrosion is one important problem that must be faced by a variety of industrial sectors in Indonesia. Corrosion effect in terms of economic and in terms of safety. One way of prevention and corrosion control is by the addition of inhibitors.

Sweet potatoes as the organic material can be developed as an inhibitor to reduce corrosion rates for low carbon steel in sea water environment. Purple sweet potatoes are expected to serve as safety inhibitors ,friendly environment, and biodegradable and also reduce the use of synthetic materials. Weight loss method is used to test the effectiveness of sweet violet as inhibitors with various concentration (2ml, 4ml, 6ml) and soaking for 4 days.

Conclusion of this study that sweat potato as green inhibitor work less well in the environment of sea water because of efficiencies gained relatively small, making it less suitable for use as an inhibitor. Efficient average of the 3 concentrations were obtained approximately 13.20%, with a maximum value of efficiency occurs at a concentration that is equal to 21.02% at 2ml."

"Ubi jalar Ipomoea batatas L. varietas ungu, orange, dan putih dapat dibedakan berdasarkan warna kulit dan daging umbinya. Penelitian aktivitas antiinflamasi oleh tanaman ini masih terbatas meskipun telah dimanfaatkan secara tradisional. Penelitian ini bertujuan untuk mengetahui nilai IC50 ekstrak umbi Ipomoea batatas L. dalam menghambat aktivitas lipoksigenase. Simplisia umbi ubi jalar diekstraksi dengan metode maserasi menggunakan pelarut etanol 70. Masing-masing ekstrak diuji penghambatannya terhadap aktivitas lipoksigenase dan dilakukan penapisan fitokimia serta penetapan kadar flavonoid total. Nilai IC50 dan kadar flavonoid total yang diperoleh dari masing-masing ekstrak dianalisis hubungannya menggunakan software SPSS versi 22.0. Hasil uji penghambatan aktivitas lipoksigenase menunjukkan bahwa nilai IC50 ekstrak umbi ubi jalar ungu, orange, putih berturut-turut adalah 46,09; 52,12; dan 63,69 g/mL. Pada penapisan fitokimia diketahui bahwa ketiga ekstrak mengandung golongan senyawa alkaloid, flavonoid, saponin, tanin, dan glikosida. Kadar flavonoid total dalam ekstrak ubi jalar ungu, orange, dan putih berturut-turut adalah 8,45 0,41; 7,57 0,03; dan 6,12 0,14 mgQE/g ekstrak. Kadar flavonoid total dan nilai IC50 ketiga ekstrak saling berhubungan kuat dan berbanding terbalik dengan nilai signifikansi 0,026 dan korelasi -0,999 yang menunjukkan bahwa semakin tinggi kadar flavonoid total maka semakin rendah IC50.

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Sweet potatoes Ipomoea batatas L. with purple, orange, and white varieties can be differentiated by their skin and flesh tubers rsquo colors. Research on anti inflammatory activity of this plant is still limited although has been used traditionally. This study aims to determine IC50 value of sweet potato tubers extract in inhibiting lipoxygenase activity. Dried tubers of sweet potato were extracted by maceration with ethanol 70 . Each extracts were tested for lipoxygenase inhibitory activity, phytochemical screening, and total flavonoid content. IC50 and total flavonoid content obtained from each extracts were analyzed using SPSS version 22.

IC50 value of purple, orange, and white sweet potato tuber extract were 46.09, 52.12, and 63.69 g mL. Phytochemical contents of each extracts contain alkaloids, flavonoids, saponins, tannins, and glycosides. Total flavonoid content in purple, orange and white sweet potato extracts are 8.45 0.41 7.57 0.03 and 6.12 0.14 mgQE g extract. Total flavonoid contents and IC50 values of each extracts are strongly correlated and inversely proportional with significance value 0.026 and correlation value 0.999 which indicate that the higher the total flavonoid contents the lower the IC50. "