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Irwan Effendi
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INDONESIA
Jurnal Natur Indonesia
Published by Universitas Riau
ISSN : 14109379     EISSN : 25030345     DOI : https://doi.org/10.31258/jnat
Core Subject : Science, Agriculture, Engineering,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry
Jurnal Natur Indonesia published since 1998, is a science journal that presents articles on research results, thoughts and views from researchers and experts in the field of biosciences (basic science), including biology, physics, chemistry and mathematics. In the field of biosciences (basic science); Biology, Physics, Chemistry, Mathematics.
Arjuna Subject : Biokimia, Genetika dan Biologi Molekuler - Biokimia, Genetika dan Biologi Molekuler (Lain-Lain)
Articles 5 Documents
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Search results for , issue "Vol 17, No 1 (2016)" : 5 Documents clear
Pengaruh Ukuran Partikel Arang Sekam Padi Dan Waktu Refluks terhadap Kadar Abudan Daya Serap Karbon Sekam Padi Solihudin, Solihudin; Noviyanti, Atiek Rostika; Rahayu, Iman
Jurnal Natur Indonesia Vol 17, No 1 (2016)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (219.108 KB) | DOI: 10.31258/jnat.17.1.33-41

Abstract

The highest content in rice husk is ash with its main component of silica. Silica in ash causes the low adsorption capacity. Activated carbon from rice husk can be obtained by lowering the ash content. The aim of this study is determine the effect of particle size of charcoal and reflux time the ash content using a solution of potassium carbonate. The activation of rice husk char was carried out by using reflux methods with a potassium carbonate solution. The resulted carbon was washed using hydrochloric acid tested using iodine and methylene blue to examine of its adsorbance. The particle size of rice husk and reflux time decrease ash content in rice husk. In general, husk with the size of 80 mesh can produce carbon with low ash content and high absorption using reflux time at least for 120 minutes. Rice husk size of 100 mesh refluxing with potassium carbonate for 150 minutes can reduce the ash content as 91.85% and adsorptivity of the iodine at 331 mg.g -1 .
Kuersetin dari Daun Erythrina poeppigiana (leguminosae) Herlina, Tati; Supratman, Unang
Jurnal Natur Indonesia Vol 17, No 1 (2016)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (76.854 KB) | DOI: 10.31258/jnat.17.1.1-4

Abstract

Erythrina plants known plants “dadap” is a higher plant that grows in tropical and subtropical regions. E. poeppigiana plants was a source of secondary metabolites, which contain flavonoids. This study aims to isolate the flavonoid compounds from the leaves of  E. poeppigiana through the stages of extraction, fraction, separation and purification. E. poeppigiana leaves powder (2.5 kg) was extracted with methanol and partitioned with n-hexane and ethyl acetate. Furthermore, the separation of ethyl acetate of E. poeppigiana leaves fraction using a combination of column chromatographic was obtained pure compound (5 mg) in the form of a yellow amorphous  solid. The chemical structure of pure compound was based on the data spectroscopy (MS, UV, IR, 1H-NMR and 13C-NMR) and identified as the compound 3,3 ‘, 4’, 5,7-pentahidroksiflavon or known as quercetin.
Perubahan Komposisi Kimiawi Produk Yogurt dengan Penambahan Kalsium Karbonat pada Kultur Starter Campuran Safari, Agus; Ghina, Sarah Fahma; Djajasoepena, Sadiah; ', O. Suprijana; Indrawati, Ida; Rachman, Saadah D.; Kamara, Dian S.; Ishmayana, Safri
Jurnal Natur Indonesia Vol 17, No 1 (2016)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (488.46 KB) | DOI: 10.31258/jnat.17.1.5-12

Abstract

Mixed lactic acid bacteria culture is commonly used in yogurt production. In the present study, two lactic acid bacteria (Lactobacillus bulgaricus and Streptococcus thermophillus) was used as starter culture. Calcium carbonate was added to the starter culture to increase the quality of mixed starter culture of L. bulgaricus and S. thermophillus with ratio of 4:1. The present study was directed to investigate the chemical composition of mixed starter culture with and without calcium carbonat addition. Furthermore, the effect of each starter culture on yogurt product chemical composition was also examined. The pH, lactose, soluble protein and acid content was determined as chemical composition parameters. For starter culture without calcium carbonate addition, the yogurt has pH, lactose, soluble protein and acid content of 4.18–4.39, 4.18–4.39% w/v, 2.88–4.36% w/v and 0.82–0.99% w/v, respectively. While for starter culture with calcium carbonate addition, the yogurt product has pH, lactose, soluble protein and acid content of 4.26–4.37, 1.47–1.75% b/v, 3.42–4.95% w/v and 0.86–1.11% w/v, respectively. Addition of 0.05% w/v calcium carbonate to mixed starter culture gave effect on lactose consumption, where it still can convert lactose to lactic acid up to 45 days of storage. Furthermore, the yogurt product made with starter culture with calcium carbonate addition has higher soluble protein content compared to yogurt made with starter culture without calcium carbonate addition
Pengaruh Pemberian Senyawa Taurin dan Ekstrak Daun Dewa Gynura segetum (Lour) Merr terhadap Eritrosit dan Leukosit Mencit (Mus musculus) yang Diinduksi Benzo[α]Piren Marlinda, Henny; Linirin Widiastuti, Endang; Susanto, G. Nugroho; ', Sutyarso
Jurnal Natur Indonesia Vol 17, No 1 (2016)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (150.764 KB) | DOI: 10.31258/jnat.17.1.13-21

Abstract

Blood cancer (leukemia) is a cancer that occurs due to malignancy of blood cells. Treatment of leukemia generally causes damage to normal cells. Therefore, it needs a drug that has the effect of repairing cell damage and the ability to boost immunity of normal such as taurine and Gynura leaves which are expected to have anticancer and antioxidant properties. The purpose of this study was to investigate the effect of taurine and dewa leaf extract on blood tissues induced by benzo [α] pyrene in vivo, by looking at changes in body weight, the number of red blood cells (erythrocytes), the total number and differentiation of white blood cells (leukocytes) in mice (Mus musculus). Data were analyzed by One Way ANOVA test followed by LSD at 5% significance level. The treatment groups were the group I was given 0.2 mL of corn oil (negative control), group II (given benzo [α] pyrene as a positive control, Group III (given taurine 7.8 mg/BW/day starting from day 1 to 15 before the induction of benzo [α] pyrene until the end of the study), Group IV was given benzo [α] pyrene, then were given taurine 7.8 mg/BW/day were given 2 times a day, as well as the V group was given benzo [α] pyrene, then given a dose of Gynura leaf extract 277.8 mg /BW/day. The results showed taurine and Gynura leaf extract were able to obstruct leukemia by increasing body weight, erythrocyte, leukocyte, and the number of leukocyte differentiation which becomes normal again. In conclusion taurine has better ability for therapoitic than Gynura leaf extact against blood cells induced by benzo[α]piren
Pengaruh Pemberian Taurin terhadap Gambaran Histopatologi Paru Mencit (Mus musculus) yang Diinduksi Karsinogen Benzo(α)Piren secara In Vivo Roselyn, Arini Pradita; Widiastuti, Endang Linirin; Susanto, G. Nugroho; ', Sutyarso
Jurnal Natur Indonesia Vol 17, No 1 (2016)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (793.323 KB) | DOI: 10.31258/jnat.17.1.22-32

Abstract

Lung cancer is a disease that causes high mortality. Drugs used to prevent and cure cancer mostly causes intoxicity to the normal tissues due to its less effectiveness. Therefore, it is necessary to find out any agent or substance which works much more effective and safe for cancer treatment. The aim of the study was to elucidate the role of taurine on the lung tissue of mice (Mus musculus) induced by carcinogenic benzo(α)pyrene. The experiment was conducted in a completely randomized design with 5 replications. Six treatment groups were perfomed. Group I was given 0.2 mL of corn oil and given aquadest until the end of the study period, group II was induced by benzo(α)pyrene without administration of taurine, group III before induced with benzo(α)pyrene, was given taurine dosage 7.8 mg/BW/day for two weeks, group IV after induced benzo(α)pyrene, was given taurine with dosage 3.9 mg/BW/day, group V after induced benzo(α)pyrene, was given taurine with dosage7. 8 mg/BW/day, group VI after induced with benzo(α)pyrene, was given taurine with dosage 15.6 mg/BW/day. The results of the Kruskal-Wallis analysis and one way ANOVA with LSD (p>0,05) showed that taurine reduced lung tissue damage 72.73% due to the administration of benzo(α)pyrene of 0.3 mg/BW/day. In addition, the effective dose of taurine reduce lung tissue damage was 15.6 mg/BW/day.

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