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All Journal Jurnal Mahasiswa Statistik Indonesian Journal of Life Sciences Prosiding Seminar Nasional Official Statistics
Nanda Rizqia Pradana Ratnasari, Nanda Rizqia Pradana
Indonesia International Institute Of Life Sciences
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Economics, Econometrics & Finance Medicine & Pharmacology Social Sciences

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PEMODELAN CURAH HUJAN DENGAN ZERO INFLATED GAMMA (ZIG) Ratnasari, Nanda Rizqia Pradana; astutik, suci; efendi, achmad
Jurnal Mahasiswa Statistik Vol 3, No 2 (2015)
Publisher : Jurnal Mahasiswa Statistik

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (0.001 KB)

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SPATIO-TEMPORAL MODEL FOR PREDICTING COVID19 CASES IN INDONESIA Nanda Rizqia Pradana Ratnasari; Vita Rosiana Dewi
Seminar Nasional Official Statistics Vol 2020 No 1 (2020): Seminar Nasional Official Statistics 2020
Publisher : Politeknik Statistika STIS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (300.93 KB) | DOI: 10.34123/semnasoffstat.v2020i1.723

Abstract

Objective: Spatio-temporal modelling is a method used for data which has spatial (area) and temporal (time) property. Confirmed cases of Covid19 in each province Indonesia were recorded from March 2nd to September 15th, 2020. The spatio-temporal model in this study are split into two parts which are ARIMA(p,d,q) for the temporal pattern and Bayesian Poisson regression to explain the spatial pattern.Method: Data for the study was obtained from Data Repository of Indonesian National Board for Disaster Management - Indonesia Task Force for Covid-19 Rapid Response (Gugus tugas Percepatan penangana Covid19) official website which are an opened source data. The Rstudio, Arcgis and excel was used to carry out the statistical analysis involved in the investigation. In the temporal analysis, data was assumed to have an increasing trend and to create a stationary series, an integrated method was conducted. Box-Jenskin and Ljung-Box method was taken in parameter estimation and model identification process. For the spatial analysis, a Bayesian Poisson Regression is fitted to the dataset with Metropolis algorithm.Result: Model IMA(1,1), in general, can explain he increasing trend in the Covid19 confirmed cases in Indonesia. This model can define that the case number at the particular time is affected by the moving average at lag-1. Meaanwhile, a Bayesian Poisson Regression can elaborate spatial pattern in the data. The fitted model shows that the confirmed cases at particular province is also affected by the population density at those provinces. As there are some limitation in the data and method applied in the study, further analysis and research are needed.
The Stability of Phycocyanin, Phycoerythrin, and Astaxanthin from Algae Towards Temperature, pH, Light, and Oxygen as a Commercial Natural Food Colorant Goyudianto, Bryan Ashley; Meliana, Catarina; Muliani, Debby; J, Jeslin; Sadeli, Yohana Elma; Ratnasari, Nanda Rizqia Pradana
Indonesian Journal of Life Sciences 2021: IJLS Vol 03 No .02
Publisher : Indonesia International Institute for Life Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (393.757 KB) | DOI: 10.54250/ijls.v3i2.126

Abstract

Nowadays, food industries are exploring more about naturally-derived colorants. Algae is proposed to be an excellent alternative source for natural colorants as it needs lesser biomass. Phycocyanin, phycoerythrin, and astaxanthin are commercially used blue-green, red, and red-orange algae-sourced pigments due to their high protein yield, health benefits, and ease of extractions methods. A literature survey conducted using Google Scholar and ScienceDirect database with inclusion and exclusion criteria gained 44 papers used as primary references to assess those algae pigments' stability towards temperature, pH, light, and oxygen for food applications. Low pH levels and addition of preservatives (sugar, citric acid) or polyhydric alcohols enhance phycocyanin range of stability (pH of 5–6 and >40oC with pH >5 or <3). Phycoerythrin’s stability at -20 to 4°C and neutral pH is improved by adding additives (citric acid, benzoic acid) or nanofibers, cross-linking method, complex formation, and microencapsulation. Phycocyanin and phycoerythrin’s light stability depend on the light’s composition, quality, and quantity; hence, utilization of dark-colored packaging to prevent light exposure is done. Astaxanthin’s instability towards light exposure (causing photoexcitation), temperature of >30°C, and pH of >4 can be solved through chitosan solution coating and microencapsulation using various wall materials and complex formation. Phycocyanin is unaffected against oxygen (unlike phycoerythrin and astaxanthin), yet all of them exert antioxidant properties. Therefore, the inconsistency of these colorants’ stability depending on food processing conditions demand further development through research to widen their commercial food applications.
The Perception of Undergraduate Students in Jakarta on the Consumption of Cultured Meat Virginia, Jeslin Audrey; Widjojo, Clara Ayu; Inaray, Ivetta Izhora; Ratnasari, Nanda Rizqia Pradana
Indonesian Journal of Life Sciences 2021: IJLS Vol 03 No .02
Publisher : Indonesia International Institute for Life Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54250/ijls.v3i2.144

Abstract

Cultured meat, which is meat produced by cell culture, is forecasted to be a prominent solution for the growing meat demand. While startups have been established and cultured meat has been marketed in other countries, research about consumer perception is still lacking in Indonesia. The objective of this study is to identify and analyze the customer standpoint, specifically among undergraduate students in Jakarta, regarding cultured meat production and consumption through an online survey. It is hypothesized that there is an effect of being an i3L, and, a biology or food-related major undergraduate student to the cultured meat consumption acceptance. Moreover, it is predicted that there will be a positive change in cultured meat consumption acceptance after watching an educational video included in the survey. Especially, from the group of vegetarians who are motivated to support animal welfare (i.e. No killing of animals) and improve environmental conditions (i.e. Reduce carbon emission). The results showed that study majors and vegetarian status was not significantly correlated with cultured meat acceptance. Nonetheless, previous knowledge about cultured meat positively affects the acceptance. Moreover, the educational video was able to increase the participants’ acceptance. This implies that awareness raising activities, such as advertisements and campaigns, would be effective.
Co-Authors Achmad Efendi Goyudianto, Bryan Ashley Inaray, Ivetta Izhora J, Jeslin Meliana, Catarina Muliani, Debby Sadeli, Yohana Elma Suci Astutik Virginia, Jeslin Audrey Vita Rosiana Dewi Widjojo, Clara Ayu