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Jurnal Ilmiah Sains
Published by Universitas Sam Ratulangi
ISSN : 14123770     EISSN : 25409840     DOI : https://doi.org/10.35799/jis.v22i2.40961
Core Subject : Science, Education, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Mathematics Physics
Jurnal Ilmiah Sains (Journal of Scientific Sciences) is the Journals Published by Faculty of Mathematics and Natural Sciences, Sam Ratulangi University. Jurnal Ilmiah Sains Published Twice a Year, i.e April and October. Jurnal Ilmiah Sains  welcomes full research articles in the area of Mathematics and Natural Sciences from the following subject areas: Mathematics Statistics Computer Science Physics Chemistry Biology
Arjuna Subject : Umum - Umum
Articles 345 Documents
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Kecenderungan Konsumen Memilih Merek Rokok dengan Analisis Korespondensi Deiby Tineke Salaki
Jurnal Ilmiah Sains Volume 7 Nomor 1, April 2007
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/jis.v7i1.48113

Abstract

Motivasi, sebagai salah satu faktor psikologi yang mempengaruhi konsumen dalam membeli suatu produk, sangat berarti bagi produsen agar kegiatan pemasaran lebih terarah. Penelitian ini bertujuan untuk mendapatkan gambaran kecenderungan konsumen dalam memilih merek rokok. Melalui penelitian ini diketahui Dji Sam Soe merupakan merek yang dapat mendukung penampilan seseorang, Sampoerna dipilih karena memberikan kenikmatan dan kebebasan, L.A.Light merupakan merek rokok yang kurang disukai dan hanya menjadi alternatif, Gudang Garam Filter dipilih karena membuat pikiran menjadi segar dan nyaman serta memberikan kebebasan dan dapat menjadikannya lebih aktif, dan Marlboro merupakan merek rokok untuk bersosialisasi dan memberikan kebanggaan kepada yang mengkonsumsinya. Kata Kunci: Merek, Rokok, Analisis Korespondensi CONSUMER PREFERENCE IN CHOOSING CIGARETTE BRAND WITH CORRESPONDENCE ANALYSIS ABSTRACT Motivation, as one of psycologycal considerations in purchasing a product, is very meanigful for producer in doing more directed marketing activities. The Aims of this research is to discover the description of consumer trend in choosing cigarette brand. The result show that Dji Sam Soe is chosen for supporting ones appearance; Sampoerna can give pleasantness and freedom; while L.A.Light is only an alternative brand; Gudang Garam Filter is liked because can refresh their mind, making free-feeling and more active; Marlboro is the brand for social activities and as the pride of themselves. Keywords: Brand, Cigarette, Correspondence Analysis
Evaluation of Growth Response of Superwin Rice Variety to Salinity at The Germination Phase Billy Deivico Manis; Susan Marlin Mambu; Song Ai Nio
Jurnal Ilmiah Sains Volume 23 Nomor 1, April 2023
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/jis.v23i1.45076

Abstract

Evaluation of the salinity resistance of Superwin as a local rice of North Sulawesi, is still very limited. This study aimed to examine the growth response of Superwin compared with Ciherang variety to various levels of seawater salinity at the germination phase. The research commenced with planting rice seeds using the Roll Paper Test method, then growing them under salinity treatments of 0, 10, and 20% seawater. The observed rice growth responses were the percentage of germination, the length of seminal root and shoot, the ratio of seminal root length: shoot length and the vigor index. The results of analysis of variance (ANOVA) showed that the percentage of germination, the length of seminal root and shoot, and vigor index were significantly different between two varieties and among salinity treatments. The interaction between factors of variety and salinity treatment caused differences in the ratio of seminal root length: shoot length. Superwin showed higher percentage of germination, the length of seminal root and shoot as well as vigor index than Ciherang. The 0% and 10% salinity treatments showed a higher percentage of germination, the length of seminal root and shoot as well as vigor index than the 20% treatment. The ratio of seminal root length and shoot length was a potential indicator of salinity stress in Superwin rice. Keywords: Germination; rice; salinity; superwin
Analysis of Hydroquinone and Kojic Acid Content in Three Brand Body Lotions Using High Performance Liquid Chromatography Yessy Dwi Anggraini; Khoirul Anwar; Aqnes Budiarti
Jurnal Ilmiah Sains Volume 23 Nomor 1, April 2023
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/jis.v23i1.45703

Abstract

Treatment of hyperpigmentation can be done with several compounds, including a combination of hydroquinone and kojic acid in cosmetic preparations that are considered safe and effective. This study aims to analyze the levels of hydroquinone and kojic acid in three trademarks of body lotion using HPLC.  The study used HPLC at a wavelength of 283 nm. The stationary phase used was C18, and the mobile phase was a mixture of acetonitrile:aquabidest (20:80, v/v) with a flow rate of 1.0 mL/min. Validation tests were carried out, including linearity, sensitivity (LOD and LOQ), selectivity, precision, and accuracy. The analytical method was applied to 3 body lotion preparations.  The linearity test of hydroquinone and kojic acid with a value of r = 0.999; Hydroquinone LOD 0.274 g/mL; LOQ of hydroquinone 0.913 g/mL; LOD of kojic acid 0.420 g/mL; LOQ of kojic acid 1,401 g/mL; selectivity test 1.5; the precision test of hydroquinone and kojic acid resulted in the value of %RSD 2%; hydroquinone accuracy 99.200-100.450%; kojic acid 99.454-100.450%. The content of hydroquinone body lotion brand A, 0.854%, B 0.470%, and C 1.557%, kojic acid content in body lotion brand A 0.823%, B 0.510%, and C 1.497%. The results showed that all the results of the validation test fulfill the requirements of the validation parameters and the results of the analysis of the content of hydroquinone and kojic acid in the three trademarks of body lotion fulfill the requirements. Keywords: Body lotion; hydroquinone levels; kojic acid  
Odd Harmonious Labeling of the Zinnia Flower Graphs Fery Firmansah; Tasari Tasari; Muhammad Ridlo Yuwono
Jurnal Ilmiah Sains Volume 23 Nomor 1, April 2023
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/jis.v23i1.46771

Abstract

An odd harmonious graph is a graph that satisfies the odd harmonious labeling properties. In this study, a new graph class construction is presented, namely zinnia flower graphs and variations of the zinnia flower graphs. The research method used is qualitative and includes several phases, namely data collection, data processing and analysis, and verification of the results. The purpose of this research is to find a new class of graphs that is a family of odd harmonious graphs. We will prove that prove that the zinnia flower graph and its variations satisfy odd harmonious labeling properties. The result of this research is that the zinnia flower graph and its variations are odd harmonious graphs. Keywords: Flower graph; odd harmonious graph; odd harmonious labelling; zinnia flower  graph Pelabelan Harmonis Ganjil dari Graf Bunga Zinnia ABSTRAK Graf yang memiliki sifat pelabelan harmonis ganjil adalah graf harmonis ganjil. Pada penelitian ini akan didapatkan konstruksi graf bunga zinnia dan variasi graf bunga zinnia. Metode penelitian yang digunakan adalah penelitian kualitatif yang terdiri beberapa tahapan yaitu pengumpulan data, pengolahan dan analisis data, serta verifikasi hasil. Tujuan penelitian ini adalah menemukan kelas graf baru yang merupakan keluarga dari graf harmonis ganjil. Hasil penelitian ini diperoleh bahwa graf bunga zinnia dan variasi graf bunga zinnia merupakan graf harmonis ganjil. Kata kunci: Graf bunga; graf bunga zinnia; graf harmonis ganjil; pelabelan harmonis ganjil
Effect of Dalugha (Cyrtosperma merkusii) Debris Supplementation on Hemoglobin, Cholesterol and Blood Glucose Levels in Broiler Chickens Debby J.J. Rayer; Emma Mauren Moko; Dino Rahardiyan; Anita C.C Tengker; Christny F. Rompas; Livana Dethris Rawung
Jurnal Ilmiah Sains Volume 23 Nomor 1, April 2023
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/jis.v23i1.47598

Abstract

Feed is an important factor that influences the chicken's development and growth. Meanwhile, dalugha debris is a by-product of dalugha processing which is expected to be a source of feed for the growth and development of broiler chickens. The good feed can optimize metabolic processes in the animal so that it can support the process of growth and development of the animal. This study aims to determine the levels of hemoglobin, cholesterol, and blood glucose in broiler chicken that is given dalugha debris supplementation. This study used a completely randomized design (CRD), where as many as 60 docs of unsex chicken used were divided into four treatments and three replications. Each replication consisted of five chickens. The treatment given was the concentration of dalugha debris at several doses: 0%, 0.065%, 0.13%, and 0.26%. The parameters observed were hemoglobin, cholesterol, and blood glucose levels. The results showed that the provision of dalugha debris in the feed significantly (p<0.05) affected the blood glucose level, but did not affect the cholesterol and hemoglobin levels (p>0.05) of the broiler chicken. Keywords: Broiler chicken; blood biochemistry; Cyrtosperma merkusii
Correlation Between Interest Entry Senior High School Student with Parents Social Economy and Environment (Case Study: Senior High School Students in Manado City) Djoni Hatidja
Jurnal Ilmiah Sains Volune 8 Nomor 1, April 2008
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/jis.v8i1.49155

Abstract

The objective of this research was to know correlation between interest entry of senior high school student at university with parents social economy, and stay location. This research had been done at some state senior high school (third natural science class, third social science class and third language class) in Manado on January to April 2007. The results showed that parents education, parents job, parents income and environment of student address have correlation between interest student to continu at university. Keywords: Senior high school, parents education, parents income
Unit Linked Life Insurance Premium Reserve Modification Using Fackler and Point to Point Methods Sheren Rosari Monica Rachmad; Tohap Manurung; Chriestie E.J.C Montolalu
Jurnal Ilmiah Sains Volume 23 Nomor 1, April 2023
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/jis.v23i1.46228

Abstract

The present study aims to investigate the use of the Fackler method in determining the reserve of unit-linked whole life insurance premiums. Unit-linked whole life insurance combines both protection and investment features, and to mitigate liquidity risks, it is crucial for the insurer to establish reserves. The insurer limits the value of the benefits obtainable through a minimum guarantee and stamp value to counteract losses that may arise due to fluctuations in share prices.The Fackler method is employed to calculate the reserve of unit-linked whole life insurance premiums by determining the cash value of annuities using a fixed interest rate in conjunction with the Indonesia Mortality Table 2019. Subsequently, an annual net premium is calculated. The calculation of the annual net premium necessitates the determination of a single net premium, which is computed using the Point to Point method with the result is . The outcome of this calculation yields the reserve value for a 40-year-old individual. It is noteworthy that the reserve value will increase with the lifespan of the individual or the duration of the policy contract. Keywords : Fackler method;  premium reserves; Unit-linked
Quality and Antioxidant Activity of Scrub Bath Soap with Addition of Eucheuma spinosum Algae Powder Firdayanti Paputungan; Lidya Irma Momuat; Edi Suryanto
Jurnal Ilmiah Sains Volume 23 Nomor 1, April 2023
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/jis.v23i1.48540

Abstract

A study was conducted to evaluate the quality and antioxidant activity of solid body soap with the addition of Eucheuma spinosum powder as a scrub. Soap was made by the saponification method between oil (a mixture of olive oil (44%), coconut (24%), and palm (32%)) with NaOH. This study consisted of 4 treatments: (1) without adding algae powder (control) with cold process (TC), (2) adding algae powder with cold process (SC), (3) without adding algae powder (control) with hot process (TH), and (4) the addition of algae powder with a hot process (SH). Soap quality was evaluated using the Indonesian National Standard (SNI) 3532:2021 method, and antioxidant activity using the DPPH method. Parameters tested consisted of pH, total fat, water content, matter insoluble in ethanol, free fatty acids, chlorides, non-saponifiable fats, and the percentage of DPPH inhibition. The results showed that the quality of scrub soap complied with SNI for parameters of pH, content of water, matter insoluble in ethanol and chloride; and did not meet SNI for parameters of total fat, content of free fatty acid and unsaponifiable fat. The percentage of DPPH inhibition of each bath soap at a concentration of 150 µg/mL soap solution was 58.97% TC, 76.76% SC, 56.11% TH and 70.13% SH. Scrub soap with the addition of algae powder had higher antioxidant activity than without the addition of algae powder, both in cold and hot processes. Keywords: Antioxidant;  Eucheuma spinosum; scrub bath soap; SNI
Potential Analgesic of Ethanolic Extract Fruit and Seeds of Trembesi (Samanea saman (Jacq) Merr.) and Macroscopic Observations on the Gastric of Rats Rosa Juwita Hesturini; Rachma Nurhayati; Nadia Pramasari
Jurnal Ilmiah Sains Volume 23 Nomor 2, Oktober 2023
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/jis.v23i2.47422

Abstract

Trembesi (Samanea saman (Jacq.) Merr.) is a plant from the Fabaceae family known to the public as Ki Hujan. Trembesi fruit and seeds have several chemical compounds there are alkaloids, flavonoids, saponins, and tannins which have analgesic activity. This study aims to determine the dose of an extract of the fruit and seeds of trembesi which has analgesic activity but does not cause side effects in the form of irritation to the stomach of rats (Rattus norvegicus) macroscopically. A total of 40 rats were in 8 treatment groups, namely a negative control group of 0.5% CMC-Na, a positive control group of 500 mg acetosal, a group of 3, 4, 5 extracts of trembesi fruit at doses of 100, 200, 300 mg/kg BW, group 6, 7, 8 extracts of trembesi seeds at doses of 100, 200, 300 mg/kg BW. 0.7% acetic acid was induced in rats intraperitoneally as a pain inductor. The analgesic activity test was using the writhing test method and then the extract was continued for 7 days to determine the safety of the rat gastric. Data were analyzed using non-parametric Kruskal-Wallis and Man-Whitney. The results showed that the optimal ethanol extract of trembesi fruit and seeds was shown at a dose of 200 mg/kg BW with an analgesic power of 75,74% and 76,79% equivalent to acetosal which was 81.74% (Sig. > 0.05) with an ulcer index of 2 or otherwise not showed irritation of the stomach seen from the results of macroscopic observations of gastric. This study concludes that the ethanol extract of trembesi fruit and seeds at a dose of 200 mg/kg has the best analgesic activity and is safe for the stomach. Keywords: Analgetic; Samanea saman; trembesi; ulcer index
Antipyretic Activity of Ethanol Extract from Beligo (Benincasa hispida (Thunb.) Cogn.) Fruit Flesh in Wistar Albino Rats (Rattus norvegicus) Nur Alim; Rusman Hasanuddin; Jasmiadi Jasmiadi; Musdalifah Musdalifah; A. Ihdinal Hagg; Nur Linda
Jurnal Ilmiah Sains Volume 23 Nomor 2, Oktober 2023
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/jis.v23i2.48443

Abstract

The people of South Sulawesi employ beligo as a plant with fever-reducing properties. The utilized part is the flesh of its fruit. The beligo fruit contains fatty acids, flavonoids, phenolics, and steroids that hold promise as antipyretic agents. The study aimed to determine the antipyretic activity of ethanolic extract from beligo fruit flesh on male Wistar rats induced with peptone solution. The research method encompassed maceration extraction using 70% ethanol solvent and antipyretic activity testing using 15 male Wistar rats divided into five treatment groups. Group I served as the negative control and received SODIUM-CMC 1%, groups II, III, and IV received ethanolic extract of beligo fruit flesh at doses of 250 mg/kg BW, 500 mg/kg BW, and 750 mg/kg BW respectively, and group V, the positive control, received paracetamol tablets. Measurements of initial temperature, temperature after induction, and temperature after treatment were taken at 30-minute intervals for 180 minutes. Data were statistically analyzed using a Completely Randomized Design (CRD) and Duncan test. The research findings revealed a fever reduction percentage of 1,57% for group I, 4,03% for group II, 4,28% for group III, 4,45% for group IV, and 5,25% for group V. Data analysis indicated that ethanolic extract of beligo fruit flesh at doses of 250 mg/kg BW, 500 mg/kg BW, and 750 mg/kg BW exhibited significant antipyretic activity (p < 0.05). The ethanolic extract from beligo fruit flesh possesses antipyretic activity in induced Wistar rats, suggesting its potential use as a fever-reducing medication. Keywords: Antipyretic; Benincasa hispida (Thunb.) Cogn; fever

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