Tahongai (Kleinhovia hospita Linn.) is one of herbal plant cultivated in Kalimantan. Tahongai ste... more Tahongai (Kleinhovia hospita Linn.) is one of herbal plant cultivated in Kalimantan. Tahongai stem bark extract (Kleinhovia hospita Linn.) is known containing antioxidant to prevent cancer cell growing, therefore it is expected to become a good organic corrosion inhibitor. Tests conducted in this study were: DPPH to prove the content of antioxidant compounds in Tahongai woods (Kleinhovia hospita Linn.) from which IC50 number is found to be 153.78 µg/mL, indicating intermediate power, Fourier Transform Infrared Specroscopy (FTIR) to determine the functional groups and compounds in Tahongai stem bark extract (Kleinhovia hospita Linn.) and suspected that flavonoid compound contained in extract, Open Circuit Potential (OCP) to obtain corrosion rate data and found that the slowest corrosion occurred on 400 ppm (30 days) with corrosion rate 8,74 × 10-4 mm/year. The most efficient inhibitor found in 400 ppm (30 days) with 92,063%.
Tahongai (Kleinhovia hospita Linn.) is one of herbal plant cultivated in Kalimantan. Tahongai ste... more Tahongai (Kleinhovia hospita Linn.) is one of herbal plant cultivated in Kalimantan. Tahongai stem bark extract (Kleinhovia hospita Linn.) is known containing antioxidant to prevent cancer cell growing, therefore it is expected to become a good organic corrosion inhibitor. Tests conducted in this study were: DPPH to prove the content of antioxidant compounds in Tahongai woods (Kleinhovia hospita Linn.) from which IC50 number is found to be 153.78 µg/mL, indicating intermediate power, Fourier Transform Infrared Specroscopy (FTIR) to determine the functional groups and compounds in Tahongai stem bark extract (Kleinhovia hospita Linn.) and suspected that flavonoid compound contained in extract, Open Circuit Potential (OCP) to obtain corrosion rate data and found that the slowest corrosion occurred on 400 ppm (30 days) with corrosion rate 8,74 × 10-4 mm/year. The most efficient inhibitor found in 400 ppm (30 days) with 92,063%.
On May 25, 2002, approximately 1528 Taipei local time ( UTC 0728), China Airlines Flight No. CI61... more On May 25, 2002, approximately 1528 Taipei local time ( UTC 0728), China Airlines Flight No. CI611, a Boeing 747-200 aircraft, with 209 passengers and 16 crewmembers on board, vanished from the ATC radar screen. The CI611 departed from Taipei en-route to Hong Kong. It was later found that the aircraft had an in-flight break-up and crashed into the ocean of Taiwan Strait near Penghu Islands. The crashed site located approximately 15 nm northwest from Makung of the Penghu proper, covered an area 30 square nautical miles with an average depth of the ocean about 70 meters (230 ft). All 225 people on board Flight CI611 were perished.
Tahongai (Kleinhovia hospita Linn.) is one of herbal plant cultivated in Kalimantan. Tahongai ste... more Tahongai (Kleinhovia hospita Linn.) is one of herbal plant cultivated in Kalimantan. Tahongai stem bark extract (Kleinhovia hospita Linn.) is known containing antioxidant to prevent cancer cell growing, therefore it is expected to become a good organic corrosion inhibitor. Tests conducted in this study were: DPPH to prove the content of antioxidant compounds in Tahongai woods (Kleinhovia hospita Linn.) from which IC50 number is found to be 153.78 µg/mL, indicating intermediate power, Fourier Transform Infrared Specroscopy (FTIR) to determine the functional groups and compounds in Tahongai stem bark extract (Kleinhovia hospita Linn.) and suspected that flavonoid compound contained in extract, Open Circuit Potential (OCP) to obtain corrosion rate data and found that the slowest corrosion occurred on 400 ppm (30 days) with corrosion rate 8,74 × 10-4 mm/year. The most efficient inhibitor found in 400 ppm (30 days) with 92,063%.
Tahongai (Kleinhovia hospita Linn.) is one of herbal plant cultivated in Kalimantan. Tahongai ste... more Tahongai (Kleinhovia hospita Linn.) is one of herbal plant cultivated in Kalimantan. Tahongai stem bark extract (Kleinhovia hospita Linn.) is known containing antioxidant to prevent cancer cell growing, therefore it is expected to become a good organic corrosion inhibitor. Tests conducted in this study were: DPPH to prove the content of antioxidant compounds in Tahongai woods (Kleinhovia hospita Linn.) from which IC50 number is found to be 153.78 µg/mL, indicating intermediate power, Fourier Transform Infrared Specroscopy (FTIR) to determine the functional groups and compounds in Tahongai stem bark extract (Kleinhovia hospita Linn.) and suspected that flavonoid compound contained in extract, Open Circuit Potential (OCP) to obtain corrosion rate data and found that the slowest corrosion occurred on 400 ppm (30 days) with corrosion rate 8,74 × 10-4 mm/year. The most efficient inhibitor found in 400 ppm (30 days) with 92,063%.
On May 25, 2002, approximately 1528 Taipei local time ( UTC 0728), China Airlines Flight No. CI61... more On May 25, 2002, approximately 1528 Taipei local time ( UTC 0728), China Airlines Flight No. CI611, a Boeing 747-200 aircraft, with 209 passengers and 16 crewmembers on board, vanished from the ATC radar screen. The CI611 departed from Taipei en-route to Hong Kong. It was later found that the aircraft had an in-flight break-up and crashed into the ocean of Taiwan Strait near Penghu Islands. The crashed site located approximately 15 nm northwest from Makung of the Penghu proper, covered an area 30 square nautical miles with an average depth of the ocean about 70 meters (230 ft). All 225 people on board Flight CI611 were perished.
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