Browsing Faculty of Mathematics and Natural Sciences by Author "Achmadi, Suminar Setiati"
Now showing items 1-7 of 7
-
Catechin-3-O-rhamnoside chain extender units in polymeric procyanidins from mangrove bark
Achmadi, Suminar Setiati | Suminar, Gustini | Elvin T. Choong | Richard W. Hemingway (2010)Acid-catalysed cleavage of ‘purified’ condensed tannin isolates from Bruguiera gymnorrhiza (tancang) bark in the presence of phloroglucinol as a capture nucleophile gave, in addition to the expected procyanidin- and ... -
Effect of Extractives on Moisture Sorption and Shrinkage in Tropical Woods
Achmadi, Suminar Setiati | Elvin T. Choong (2010)Samples of sixteen tropical wood species from Indonesia were selected to undergo desorption and adsorption in the unextracted and extracted form. The anisotropic shrinkage values of these samples were also determined. At ... -
Optimizing Tannin Extraction for Antibacterial Activity of Acacia nilotica
Mustafa, Khidir Tajelseir Othman | Achmadi, Suminar Setiati | Mubarik, Nisa R (2010)Sudanese have used seeds of Acacia nilotica subsp nilotica (family Fabaceae) as folk medicine for various diseases especially against bacteria. The objectives of this work were to optimise antibacterial compounds extraction ... -
Pengaruh Nisbah Mol Lignin Resorsinol Formaldehida dan Waktu Kempa terhadap Keteguhan Rekat Kayu Lamina Manii, Maesopsis eminii Engl.
Santoso, Adi | Ruhendi, Surdiding | Achmadi, Suminar Setiati | Hadi, Yusuf Sudo (2002)Lignin m e r u p h ~ko lnponen utanlil pen)m1 kayl~s elain selulosa dan hemiselulosa Ia terdiri dari molehulmolekul senyawa plifenol yang berfungsi sebagai penght sel-sel kayu satu sama lain, sehmgga menjadi keras dan kaku, ... -
Sintesis dan Karakterisasi Resin Lignin Resorsinol Formaldehida sebagai Perekat Kayu Lamina
Santoso, Adi | Ruhendi, Surdiding | Hadi, Yusuf Sudo | Achmadi, Suminar Setiati (2004)Lignin yang terdapac &lam likuor hicam sulfac (dikenal dengan lignin kraft) mempunyai afinicas yang kuat apabila direabikan Aengn formaldehid untuk membcntuk perekat lignin formaldehid. Uncuk rneningkatkan kualitas kekuatan ... -
Uji In Vivo Saponin Tanaman Akar Kuning (Arcangelisia flava (L.) Merr) Sebagai Hepatoprotektor
Achmadi, Suminar Setiati | Sulistiyani | Batubara, Irmanida | Kayun, Saraswati P. (2002)According to in vivo studies on secondary metabolites of albutra (akar kuning plant, Arcangelisia flava (L) Merr), saponins extract without alkaloids showed a hepatoprotector activity. The best extracting solvent was mixture ... -
Use of mangrove bark tannin for wood adhesion.
Achmadi, Suminar Setiati | Sumadiwangsa, S. | Choong, Elvin T. (2010)The bark of mangrove trees (mainly Rhizophoraceae) in Indonesia contains large amounts of tannins. Use of this natural resource as adhesive for plywood and particleboard has not been fully investigated. Thus far, results ...