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All Journal Hemera Zoa INDONESIAN JOURNAL OF APPLIED PHYSICS Journal of Economics, Business, and Government Challenges
Khusnul Yakin
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Astronomy Biochemistry, Genetics & Molecular Biology Economics, Econometrics & Finance Energy Materials Science & Nanotechnology Physics Social Sciences

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PF-26 The Use of Endemic Sulawesi Medaka Fish (Oryzias celebensis) as an animal model candidate Dwi Kesuma Sari; Irma Andriani; Khusnul Yakin; Magfira Satya
Hemera Zoa Proceedings of the 20th FAVA & the 15th KIVNAS PDHI 2018
Publisher : Hemera Zoa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (563.095 KB)

Abstract

        Medaka fish (Oryzias sp) or also known as "rice fish" are non-consumption fish or ornamental fish that are in great demand by humans. Medaka fish is an animal model that is very well known and has been widely used by researchers in the world for studies in various fields of science, especially biology and medicine, as well as Zebras which have been developed as model animals. Medaka fish also used as animal models for testing Parkinson's disease caused by environmental pollution and genetic factors. Several types of mutant medaka fish have also been made for screening diabetes, cancer and other degenerative diseases.                    From the exploration results, the researchers showed that Sulawesi has a high endemism especially for the family Adrianichthyidae. The high endemism is not only supported by zoogeographic boundaries as islands located on the Weber line and Wellacea lines, but also because of this fish that are traded so that the chance of migrating this fish is small. These facts underlie the statements of several researchers that fish medaka can reveal the mystery of the evolution of aquatic fauna in Sulawesi.                    As an effort to develop Sulawesi Medaka fish (Oryzias celebensis) as a model animal, studies have been conducted with various histology studies with various staining methods in Sulawesi medaka fish so that Hasanuddin University is expected to be a gateway for researchers to obtain information about Medaka fish in the Sulawesi islands and as a center for learning fish medaka.
Marketing Strategy of Kedai Karya Online Shop to Increase Sales Khusnul Yakin; Ike Ratnasari
Journal of Economics, Business, and Government Challenges Vol. 1 No. 1 (2018): Journal of Economics, Business, and Government Challenges [JoEBGC]
Publisher : Faculty of Economics and Bussiness, UPN "Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/ebgc.v1i1.7

Abstract

This research aims to determine the marketing stategy of Kedai Karya Online Shop in increaseasing sales and and to know the factors that influence the fluctuation of sales turnover in Kedai Karya Online Shop. Informants of this research is the owner of Kedai Karya Online Shop. Sources of data collected from interviews, documentation, and observation. Data analysis techniques using interactive analysis techniques include data reduction, data presentation, and conclusions. The results show that Kedai Karya Online Shop use e-marketing strategy that is product strategy, price, communication, and distribution. Factors that influence an increase in sales turnover are seasonal factors, innovation factors, and use of paid advertising. Then the factors that affect the decline in sales turnover is the lack of promotion.
Perhitungan Energi Disosiasi Gugus Fungsi OH- dan PO43- Hidroksiapatit dengan Pemodelan Spektroskopi Inframerah Berbasis Particle Swarm Optimization (PSO) Khusnul Yakin; Sidikrubadi Pramudito; Kiagus Dahlan
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 3, No 01 (2013): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v3i01.1236

Abstract

Hydroxyapatite Ca10(PO4)6(OH)2 is a calcium phosphate compound having biocompatibility properties. FTIR (Fourier Transform Infrared Spectroscopy) was used to determine the characteristics of the hydroxyapatite group. Modeling the functional groups of hydroxyapatite can be used to obtain vibrational frequencies and spring constants. Analysis of energy release function is performed by calculating the dissociation energy. In this paper will be shown the results of theoretical modeling of hydroxyl and phosphate using spring models. Modeling the functional groups OH- obtained spring constant 524,4559 N/m and the absorption wave number 3497,5677 cm-1. Modelling functional groups PO43-obtained spring constant 612,2704 N/m and the wave number 1085,2559 cm-1 absorption. The constant and absorption wave numbers obtained are used to calculate the dissociation energy. OH- dissociation energy obtained by 566,5637 kJ/mol and the dissociation energy of PO43- is 567,6248 kJ/mol. Absorption wave numbers are obtained in accordance with experimental results on sometrik stretch modes, and the dissociation energy derived functional group is also close to the value of literature.
Co-Authors Dwi Kesuma Sari Ike Ratnasari Irma Andriani Kiagus Dahlan Magfira Satya Sidikrubadi Pramudito