Efek penambahan nano-tube imogolit pada pelepasan ibuprofen secara invitro karena pengaruh panas

buku ini menjelaskan penelitian tentang efek penambahan nano-tube imogolit pada pelepasan ibuprofen secara invitro karena pengaruh panas.vii, 72 hlm.: ilus.; 20.7 cm

Synthesis Zeolite X/Silver and Copper Oxide Composite via Tollens Reactions and Its Application as Adsorbent: Sintesis Komposit Zeolit X/Oksida Perak dan Tembaga Melalui Reaksi Tollens Serta Aplikasinya Sebagai Adsorben

Zeolite is a micro porous aluminosilic mineral that has a wide surface. Its wide surface causes zeolite to be commonly used as an adsorbent. Zeolite X is included in the Faujasite structure and usually binds sodium cations. Cations bound to zeolites can be exchanged for other cations, such as transition metal cations. Transition metal cations such as [Ag(NH3)2]+ are commonly used to detect aldehyde groups or commonly known as Tollens reagents. This study aims to synthesize composite adsorbent zeolite X / silver oxide and zeolite X / copper oxide through Tollens reaction. Composites characterized using scanning electron microscope showed that the composite surface was coarser than the surface of zeolite X. The material used as a model for adsorption was ammonia gas. The resulting composites are of three types based on the stages of zeolite addition in the synthesis process, namely after the addition of a precursor (composite 1), after addition of NH4OH (composite 2), and after heating (composite 3). The resulting composite can increase the adsorption of ammonia by up to 2 times than zeolite X.Zeolit adalah mineral aluminosilika berpori mikro sehingga memiliki permukaan yang luas. Permukaannya yang luas menyebabkan zeolit umum digunakan sebagai adsorben. Zeolit X termasuk dalam struktur Faujasit dan biasa mengikat kation natrium. Kation yang terikat pada zeolit dapat ditukar dengan kation lainnya, seperti kation logam transisi. Kation logam transisi seperti [Ag(NH3)2]+ biasa digunakan sebagai pendeteksi gugus aldehida atau biasa dikenal sebagai pereaksi Tollens. Penelitian ini bertujuan menyintesis komposit adsorben zeolit X/oksida perak dan zeolit X/oksida tembaga melalui reaksi Tollens. Komposit dikarakterisasi menggunakan scanning electron microscope menunjukkan permukaan milik komposit lebih kasar dari pada permukaan zeolit X. Bahan yang digunakan sebagai model untuk adsorpsi ialah, gas amonia. Komposit yang dihasilkan ada tiga jenis berdasarkan tahapan penambahan zeolit pada proses sintesis, yaitu setelah penambahan prekursor (komposit 1), setelah penambahan NH4OH (komposit 2), dan setelah pemanasan (komposit 3). Komposit yang dihasilkan mampu meningkatkan adsorpsi amonia hingga 2 kali lipat daripada zeolit X

Synthesis Zeolite X/Silver and Copper Oxide Composite via Tollens Reactions and Its Application as Adsorbent: Sintesis Komposit Zeolit X/Oksida Perak dan Tembaga Melalui Reaksi Tollens Serta Aplikasinya Sebagai Adsorben

Zeolite is a micro porous aluminosilic mineral that has a wide surface. Its wide surface causes zeolite to be commonly used as an adsorbent. Zeolite X is included in the Faujasite structure and usually binds sodium cations. Cations bound to zeolites can be exchanged for other cations, such as transition metal cations. Transition metal cations such as [Ag(NH3)2]+ are commonly used to detect aldehyde groups or commonly known as Tollens reagents. This study aims to synthesize composite adsorbent zeolite X / silver oxide and zeolite X / copper oxide through Tollens reaction. Composites characterized using scanning electron microscope showed that the composite surface was coarser than the surface of zeolite X. The material used as a model for adsorption was ammonia gas. The resulting composites are of three types based on the stages of zeolite addition in the synthesis process, namely after the addition of a precursor (composite 1), after addition of NH4OH (composite 2), and after heating (composite 3). The resulting composite can increase the adsorption of ammonia by up to 2 times than zeolite X.Zeolit adalah mineral aluminosilika berpori mikro sehingga memiliki permukaan yang luas. Permukaannya yang luas menyebabkan zeolit umum digunakan sebagai adsorben. Zeolit X termasuk dalam struktur Faujasit dan biasa mengikat kation natrium. Kation yang terikat pada zeolit dapat ditukar dengan kation lainnya, seperti kation logam transisi. Kation logam transisi seperti [Ag(NH3)2]+ biasa digunakan sebagai pendeteksi gugus aldehida atau biasa dikenal sebagai pereaksi Tollens. Penelitian ini bertujuan menyintesis komposit adsorben zeolit X/oksida perak dan zeolit X/oksida tembaga melalui reaksi Tollens. Komposit dikarakterisasi menggunakan scanning electron microscope menunjukkan permukaan milik komposit lebih kasar dari pada permukaan zeolit X. Bahan yang digunakan sebagai model untuk adsorpsi ialah, gas amonia. Komposit yang dihasilkan ada tiga jenis berdasarkan tahapan penambahan zeolit pada proses sintesis, yaitu setelah penambahan prekursor (komposit 1), setelah penambahan NH4OH (komposit 2), dan setelah pemanasan (komposit 3). Komposit yang dihasilkan mampu meningkatkan adsorpsi amonia hingga 2 kali lipat daripada zeolit X

Nigella sativa as an anti-inflammatory agent in asthma

Abstract Objective Nigella sativa (N. sativa) has several pharmacological actions which include antioxidant, antidiabetic, anticancer, antitussive, immunomodulator, analgesic, antimicrobial, anti-inflammatory, spasmolytic, and bronchodilator. The purpose of this study is to measure the effectivity of N. sativa ethanol extract as anti-inflammation on peritoneal Wistar rat mast cells. The laboratory experiment was used to investigate the effectivity of N. sativa as an anti-inflammatory on mast cells. Six groups of mast cells were stimulated by C 48/80 to release histamine. Group 1 were without N. sativa, while group 2, 3, 4, 5, and 6 were given N. sativa with concentrations of 0.1 mg/ml, 0.2 mg/ml, 0.3 mg/ml, 0.4 mg/ml and 0.5 mg/ml, respectively. Histamine concentration was measured by high-performance liquid chromatography-fluorometry. Result The study showed that N. sativa ethanol extract effectively inhibit histamine release from peritoneal Wistar rat mast cells proportionally to its concentration. N. sativa is effective as an anti-inflammation on mast cells by inhibition of histamine release and has no toxic effect on mast cell. N. sativa could be considered as a potential therapy for asthma therapy and prevention