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All Journal Acta Pharmaceutica Indonesia Indonesian Review of Physics (IRiP)
Annisa Rahman
Bandung Institute of Technology
Astronomy Earth & Planetary Sciences Education Materials Science & Nanotechnology

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Telaah Kandungan Kimia Rambut Jagung (Zea mays L.) Wirasutisna, Komar Ruslan; Fidrianny, Irda; Rahmayani, Annisa
Acta Pharmaceutica Indonesia Vol 37, No 1 (2012)
Publisher : School of Pharmacy Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (194.721 KB)

Abstract

Rambut jagung merupakan limbah dari industri pangan, namun sering dimaanfaatkan sebagai obat tradisional untuk peluruh air seni dan penurun tekanan darah. Penelitian ini bertujuan untuk menelaah kandungan kimia yang terdapat pada rambut jagung. Simplisia rambut jagung diekstraksi secara sinambung dengan alat Soxhlet. Ekstrak etil asetat difraksinasi menggunakan metode kromatografi cair vakum. Pemurnian dilakukan dengan menggunakan metode kromatografi lapis tipis preparatif. Isolat dikarakterisasi menggunakan spektrofotometri ultraviolet-sinar tampak dan spektrofotometri inframerah. Spektrum ultraviolet-sinar tampak isolat menunjukkan dua buah puncak pada panjang gelombang 290 nm dan 367 nm. Spektrum inframerah isolat menunjukkan adanya gugus –OH, C–H alifatik, C=C aromatik, dan C=O. Isolat diidentifikasi sebagai salah satu flavanon dengan gugus –OH pada posisi atom C nomor 5 dan atau 3´, 4´ tersubstitusi.Kata kunci : Zea mays L, rambut jagung, flavanoid, flavanone. Corn silk is considered as food industry waste; however it is traditionally utilized as diuretic and treatment for hypertension. The aim of this research is to study the chemical compound of corn silk. Crude drugs of corn silk were extracted using Soxhlet apparatus. Ethyl acetate extract was fractionated by vacuum liquid chromatography. Purification was conducted by preparative thin layer chromatography. Isolate was characterized by ultraviolet-visible and infrared spectrophotometry. Ultraviolet-visible spectrum of isolate showed two peaks at 290 nm and 367 nm. Infrared spectrum showed the presence of –OH, aliphatic C–H, aromatic C=C, and C=O groups. Isolate was identified as one of flavanone with substituted –OH group at atom C number 5 and or 3´, 4´.Keywords: Zea mays L, corn silk, flavanoid, flavanone.
Telaah Kandungan Kimia Rambut Jagung (Zea mays L.) Komar Ruslan Wirasutisna; Irda Fidrianny; Annisa Rahmayani
Acta Pharmaceutica Indonesia Vol. 37 No. 1 (2012)
Publisher : School of Pharmacy Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Rambut jagung merupakan limbah dari industri pangan, namun sering dimaanfaatkan sebagai obat tradisional untuk peluruh air seni dan penurun tekanan darah. Penelitian ini bertujuan untuk menelaah kandungan kimia yang terdapat pada rambut jagung. Simplisia rambut jagung diekstraksi secara sinambung dengan alat Soxhlet. Ekstrak etil asetat difraksinasi menggunakan metode kromatografi cair vakum. Pemurnian dilakukan dengan menggunakan metode kromatografi lapis tipis preparatif. Isolat dikarakterisasi menggunakan spektrofotometri ultraviolet-sinar tampak dan spektrofotometri inframerah. Spektrum ultraviolet-sinar tampak isolat menunjukkan dua buah puncak pada panjang gelombang 290 nm dan 367 nm. Spektrum inframerah isolat menunjukkan adanya gugus "“OH, C"“H alifatik, C=C aromatik, dan C=O. Isolat diidentifikasi sebagai salah satu flavanon dengan gugus "“OH pada posisi atom C nomor 5 dan atau 3´, 4´ tersubstitusi.Kata kunci : Zea mays L, rambut jagung, flavanoid, flavanone. Corn silk is considered as food industry waste; however it is traditionally utilized as diuretic and treatment for hypertension. The aim of this research is to study the chemical compound of corn silk. Crude drugs of corn silk were extracted using Soxhlet apparatus. Ethyl acetate extract was fractionated by vacuum liquid chromatography. Purification was conducted by preparative thin layer chromatography. Isolate was characterized by ultraviolet-visible and infrared spectrophotometry. Ultraviolet-visible spectrum of isolate showed two peaks at 290 nm and 367 nm. Infrared spectrum showed the presence of "“OH, aliphatic C"“H, aromatic C=C, and C=O groups. Isolate was identified as one of flavanone with substituted "“OH group at atom C number 5 and or 3´, 4´.Keywords: Zea mays L, corn silk, flavanoid, flavanone.
The Effect of Electrode Gap on the Nucleation of CaCl2.6H2O by using Sharp End Copper Electrode Risky Afandi Putri; Ahmad Swandi; Annisa Rahman; Radhiah Anggraeni; Inge Magdalena Sutjahja; Daniel Kurnia
Indonesian Review of Physics (IRiP) Vol. 2 No. 2 (2019)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/irip.v2i2.1183

Abstract

The performance of the calcium chloride hexahydrate (CaCl2.6H2O) to store the sensible and latent heats is mainly determined by its nucleation or liquid to the solid phase transition. This is due to the barrier that has to be overcome when the material undergoes the nucleation process with a reduction in the entropy value. This material, with melting temperature around 29.8 °C, can be used as the thermal energy storage for building applications in tropical areas such as Indonesia, in order to reduce the electrical energy for aircond (AC) machines. In this paper, we report the results of an experimental study for the effect of the electrical field to the supercooling degree and time period for a phase transition. The variation in the magnitude of the electrical field was achieved by variation in the gap of the electrode for sharp end electrodes (cathode and anode), for the commonly sold copper electrode.
Co-Authors Ahmad Swandi Daniel Kurnia Inge M. Sutjahja Irda Fidrianny Komar Ruslan Wirasutisna Radhiah Anggraeni Risky Afandi Putri