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Journal of Tropical Life Science : International Journal of Theoretical, Experimental, and Applied Life Sciences
Published by Universitas Brawijaya
ISSN : 20875517     EISSN : 25274376     DOI : -
Core Subject : Agriculture, Social,
Agriculture, Biological Sciences & Forestry Environmental Science
The Journal of Tropical Life Science (JTLS) provides publication of full-length papers, short communication and review articles describing of new finding or theory in living system, cells and molecular level in tropical life science and related areas. The journal publishes articles that report novel findings of wide Tropical Life system phenomenon in the areas of biodiversity, agriculture, fisheries, health, husbandry, forestry and environmental technology. JTLS has 1 volume with 3 issues per year.
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Articles 20 Documents
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Search results for , issue "Vol. 13 No. 2 (2023)" : 20 Documents clear
Green Synthesis of Silver Nanoparticles Using Leaves of Chromolaena odorata and its Antioxidant Activity: Green Synthesis of Silver Nanoparticles using C. odorata Siti Ernieyanti Hashim; Angelle Patrick John
Journal of Tropical Life Science Vol. 13 No. 2 (2023)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.13.02.08

Abstract

Harmful chemical waste is a serious problem being faced during the synthesis of nanoparticles due to the usage of hazardous chemicals. Synthesis of silver nanoparticles using aqueous extract of the leaves of C. odorata is cheap and environmentally friendly. This study reports the synthesis of silver nanoparticles (AgNPs) using C. odorata aqueous extract as reducing agent. The leaves of C. odorata was extracted by using cold maceration technique. The phytochemicals screening of leaves was done and positive results was showed for the presence of flavonoids, tannins, saponins, and phenolics in the leaves extract of C. odorata. The synthesized C. odorata extract mediated AgNPs was characterized using several techniques including UV-Visible spectroscopy and Field Emission Scanning Electron Microscopy (FESEM). The reduction of pure Ag (I) ions to Ag (0) was monitored using UV-Vis every one hour after 24 hours up to 28 hours and it showed an absorption band at 430-450 nm. Field emission scanning electron microscopy (FESEM) was utilized to determine its particle size and the average particle size obtained was 27.3 nm. The silver nanoparticles (AgNPs) produced by using C. odorata leaves aqueous extract was determined for its antioxidant activity by using DPPH free radical scavenging assay. The IC50 value obtained was 277.29 mg/ml. Based on the results obtained, it indicates that the silver nanoparticles (AgNPs) produced using C. odorata leaves aqueous extract possessed antioxidant activity that can scavenge free radicals.
Physical and Organoleptic Properties of Freeze-dried Local Beans and Salak Yogurt Powder: Physical and Organoleptic Properties of Freeze-dried Local Beans and Salak Yogurt Powder Sumarto; Ani Radiati; Irma Nuraeni
Journal of Tropical Life Science Vol. 13 No. 2 (2023)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.13.02.09

Abstract

Yogurt is one of the most popular fermented dairy products worldwide, with huge consumer acceptance due to its health benefits. While its shelf life is still relatively low, freeze-drying could extend the shelf life of yogurt. Other non-milk raw materials that can be an alternative substrate in yogurt are local Indonesian beans, namely Mung bean and Garut red bean. Additionally, yogurt can be added to the fiber- and carbohydrate-rich Manonjaya salak flour to produce a synbiotic product. Hence, this study aimed to produce yogurt powder comprising local nuts and Manonjaya salak through a freeze-drying process, which physical properties are organoleptically acceptable and meet Indonesian standards. In this study, the yogurt powder comprising the local Garut red- and Mung beans mixed with Manonjaya salak flour was compared to fresh yogurt as the control, plus yogurt powders from milk and nuts, as well as synbiotic yogurt powder from nuts, and Manonjaya salak flour. The physical properties of the resultant yogurt were tested for pH, %brix, moisture content, and organoleptic properties with hedonic testing. The findings revealed that the freeze-dried yogurt powder comprising Garut red- and Mung beans mixed with Manonjaya salak flour exhibited acceptable water content (10.39) with a 5.57 %brix and a final pH of 5.0, and was organoleptically acceptable by panelists. The physical and organoleptic properties of the Garut red-, mung beans, and Manonjaya salak flour yogurt power met the Indonesian national standards.
Morphological and Genetic Analysis of Momordica cochinchinensis (Lour.) Spreng. (Gac) from Different Accessions in Malaysia: Morphological and Genetic Analysis of Momordica cochinchinensis (Lour.) Spreng. (Gac) Nurin Nazihah binti Mohd Khairi; Halimaton Saadiah Othman
Journal of Tropical Life Science Vol. 13 No. 2 (2023)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.13.02.10

Abstract

Momordica cochinchinensis or gac fruit is a 'superfruit' that is well-known in Vietnam. Gac is an orange fruit that is ovoid in shape and has a soft spiny texture. In Malaysia, gac fruit is a new and less known plant. This study aimed to characterize gac fruit using morphological analysis involving both vegetative and reproductive parts and to characterize the genetic diversity in gac fruit by using Inter-simple sequence repeat (ISSR) analysis. Four different gac accessions were collected from different areas (Kota Damansara (Selangor), Melaka Tengah (Melaka), Hulu Langat (Selangor) and Kuantan (Pahang)) were cultivated under tropical conditions in Kuantan, Pahang. The gac accessions showed differences in morphological characters. Generally, the gac fruits were reddish-orange in colour, the leaf was dark green on the adaxial part and light green on the abaxial part, and the female and male flower was light yellow and white in color. The fruit weight ranged from 193.72 g (GD) to 334.70 g (GH) with varied shapes and spike density. DNA extraction was following the CTAB method. All 30 primers showed high levels of polymorphism (83%) and the polymorphism information content (PIC) with the mean of 0.48.  Nei's genetic distance coefficient ranged between 0.27 and 0.6 with the mean value of 0.41. Dendrogram based on UPGMA analysis grouped the four gac accessions into two main groups. Cluster I consisted of accession GD, GM and GH while cluster II consisted of only GX. Results from both morphological and molecular analysis showed genetic diversities in all four gac fruits studied.
Increase in Serum Ferritin Level as a Marker of Disease Activity in Pediatric Sys-temic Lupus Erythematosus (pSLE) Patients: Serum Ferritin Level as a marker of disease activity in pSLE Desy Wulandari; Wisnu Barlianto; Susanto Nugroho; Tita Luthfia Sari
Journal of Tropical Life Science Vol. 13 No. 2 (2023)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.13.02.11

Abstract

Ferritin is an acute-phase reactant that is elevated in autoimmune disorders, including systemic lupus erythematosus (SLE). However, their correlation with disease activity scores has not been confirmed. Pandemic Covid-19 makes children visitation to hospital to get the treatment of SLE were delayed. This study aimed to evaluate correlation between serum ferritin and disease activity and its role in screening for flare in pediatric SLE (pSLE) patients during pandemic Covid-19. This is a cross-sectional study conducted in Saiful Anwar General Hospital Malang. Sampling was carried out sequentially on pediatric patients who met the criteria for Systemic Lupus International Collaborating Clinics (SLICC) and were recorded between July 2021-May 2022. All patients were interviewed and assessed for disease activity using SLE Disease Activity Index 2000 (SLEDAI-2k). A score <4 was categorized as inactive disease. Biochemical, serological tests including markers of disease activity and ferritin level were measured by standard laboratory procedure. Comparison, correlation and ROC curve analyses were performed with SPSS software. There were 38 females pSLE participated in this study. The mean age of the patients were 12.6 ± 3.02 years. Serum ferritin significantly higher in active disease compared to inactive disease 84.50 ng/mL (68.00-151.75 ng/mL) ng/mL and 815.00 ng/mL (451.25-1570.00 ng/mL), a value of p<0.05 was determined to be statistically significant. A significant correlation was found between serum ferritin with SLEDAI 2K (r = 0.890, p = 0.000). Correlation was also found between serum ferritin and IgM anti-double stranded-DNA (r = 0.325, p = 0.046), but not with other laboratory and serological parameters. In ROC curve analysis, we found that Area Under The Curve (AUC) 0.989, 95%CI 0.964-1.014, p value 0,000, with cut off value 297.50 with sensitivity 85% and specificity 94.4%. Ferritin was increased in active disease   as compared to inactive disease and correlated with SLEDAI score and IgM-dsDNA. Thus, ferritin may be potential as an affordable and available marker of disease activity in pSLE during pandemic Covid-19.
Next-Generation Sequencing of the Microbial Community Profile In Free-Range Chicken (Gallus gallus domesticus) Cecum from East Nusa Tenggara Province: Microbial community profile in free-range chicken (Gallus gallus domesticus) cecum Eufrasia Reneilda Arianti Lengur; Yoga Dwi Jatmiko; Endang Arisoesilaningsih; Eko Widodo
Journal of Tropical Life Science Vol. 13 No. 2 (2023)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.13.02.13

Abstract

Free-range chicken is livestock reared to support the humans' need for protein alongside its ritualistic use in traditional medicine to treat diseases. This study investigates the diversity of bacterial communities in the free-range chicken cecum reared in different East Nusa Tenggara Province localities comprising Sambi 1, Sambi 2 villages, Labuan Bajo, and Kupang City. The extracted chromosomal DNA was subjected to next-generation sequencing using the V3-V4 region primers. Results revealed that the Kupang chicken cecum had the highest total tags, while the Sambi 2 village recorded the lowest. Similarly, Sambi 2 chicken cecum exhibited the highest unique tags (6662) and OTUs number (1261), while the Kupang samples gave the lowest at 2550 and 745, respectively. The Shannon diversity index for bacterial diversity demonstrated that cecum samples from Labuan Bajo (5.679) were more diverse than Sambi 1 (5.378), Sambi 2 (5.653), and Kupang samples (3.77). The bacteria with the highest dominance index (0.935) was found in Sambi 2, while the lowest was observed in the Kupang samples (0.082). The three bacterial phyla showing the highest relative abundance were those from Sambi 1, Sambi 2, and Labuan Bajo cecum samples, comprising Firmicutes, Bacteroidota, and Actinobacteriota.Conversely, the Kupang samples showed an abundance of Firmicutes, Bacteroidota, and Campilobacterota, compared to the Lactobacillus-dominated Kupang, Sambi 1, and Sambi 2 chicken cecum samples. The highest relative abundance for Bifidobacterium occurred in Sambi 1 and Sambi 2 chicken cecum samples, the Kupang samples were Campylobacter dominated, and Olsenella was abundant in the Labuan Bajo samples. Intriguingly, the bacterial composition in the tested chicken cecum samples largely comprised beneficial bacteria such as the lactic acid bacteria group. This bacterial group can be further characterized for obtaining probiotic cultures that could improve the health of free-range chickens.
The Selection and the Growth Condition Optimization of Ethanol‐Producing Microbes Isolated from Ragi Tapai: Selection and the Growth Condition Optimization of Ethanol‐Producing Microbes Ida Bagus Wayan Gunam; I Gede Arya Sujana; I Made Mahaputra Wijaya; Yohanes Setiyo; I Wayan Arnata; I Wayan Wisma Pradnyana Putra
Journal of Tropical Life Science Vol. 13 No. 2 (2023)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.13.02.12

Abstract

Ethanol is a biofuel produced from renewable resources, which potentially plays an important role in solving future fuel problems. This study aimed to select the highest ethanol-producing isolate from candidates obtained from previously isolated candidates from ragi and cassava tapai. The selection process was conducted in 2 stages, namely: 1) Selection of the highest ethanol-producing isolate from seven isolate candidates using PYG media containing peptone, yeast extract, and glucose at 0.75%, 0.75%, and 15%, respectively and was followed by: 2) Optimization of the growth conditions of the highest ethanol-producing isolate, which was conducted at various temperatures of 27, 30, 33, 35, 37, and 40°C with the combination of various pH of 3.5, 4.5, 5.5, and 6.5. The experimental results showed that the R5I3 isolate was the highest ethanol-producing performance isolate, which yielded approximately 4.69±0.25% (v/v). Following the temperature and pH optimization of the fermentation processes, the optimum growth conditions were at 35°C and pH 5.5, where the ethanol produced was increased to 8.63 ± 0.04% (v/v). With these results, this new strain has the potential to be used in bioethanol production processes and other industrial applications.
Cytotoxic and Osteoblast Differentiation Induction Properties of Crude Polar Extract of Piper sarmentosum leaves: Cytotoxicity and differentiation effect of P. sarmentosum Intan Zarina Zainol Abidin; Anis Nabilah Johari; Zaidah Zainal Ariffin; Muhammad Dain Yazid; Herryawan Ryadi Eziwar Dyari; Shahrul Hisham Zainal Ariffin
Journal of Tropical Life Science Vol. 13 No. 2 (2023)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.13.02.01

Abstract

Piper sarmentosum or ‘kaduk’ is a well-known herb plant in Malaysia. Its extracts were found to exhibit a bone-protective effect against osteoporotic rats. Our study aim is to morphologically observe the effect of P. sarmentosum ethyl acetate extract on the differentiation of human peripheral blood stem cells (PBSCs) into osteoblasts. P. sarmentosum extracts (1-900 µg/mL) prepared using 1% dimethyl sulfoxide (DMSO) were used in the cytotoxicity assay. Then, the differentiation assay was performed using concentrations of 1-50 µg/mL. The untreated cells acted as the negative control, while the cells cultured in 50 µg/mL ascorbic acid and 10 mM β-glycerophosphate was a positive control. The cytotoxicity effect and proliferation capacity of the cells were analyzed using Trypan Blue exclusion method, while the differentiation of PBSCs was observed using von Kossa staining and ALP gene expression analysis. The result showed a decrease in cells’ viability in a dose-dependent manner during cytotoxicity assay. After 14 days of the differentiation, a constant rate of proliferation could be observed in the treated cells and positive control, while the untreated cells showed an increase in proliferation. The mineralization of extract-treated cells showed significant differences (p<0.05) as compared to the negative control. The expression of ALP was also upregulated on day 14 of differentiation compared to day 0. In conclusion, the extract was capable to induce osteoblast differentiation of human peripheral blood stem cell and potential to be used in tissue regeneration
Effect of Ultrasonic Amplitude on the Yield and Properties of Barramundi (Lates calcarifer) Skin Collagen: Effect of Ultrasonic Amplitude on the Lates calcarifer Skin Collagen Umi Hartina Mohamad Razali; Ainaa Maisara Mohd Juraimy; Yanti Maslina Mohd Jusoh; Daniel Joe Dailin; Harisun Ya’akob; Noorazwani Zainol; Dayang Norulfairuz Abang Zaidel
Journal of Tropical Life Science Vol. 13 No. 2 (2023)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.13.02.03

Abstract

Barramundi skin, a by-product of the fish processing industry, has shown potential as an alternative collagen source. However, the commonly used acid extraction method to produce collagen rendered a low yield requires a lengthy time and is not environmentally friendly. As a result, the adoption of greener technology, such as ultrasound, to improve the conventional extraction process is emerging. This study aimed to investigate the effect of different ultrasonication amplitudes on collagen recovery from barramundi skin. The resulting collagens were evaluated for their protein, hydroxyproline and moisture content, colour, molecular weight distribution, and FTIR spectra. Ultrasound-assisted extraction (UAE) was performed at 40 (UAE40), 60 (UAE60) and 80 (UAE80) % amplitude for 20 min. For comparison, acetic acid extraction was also carried out to produce acid-soluble collagen (ASC). UAE increased the yield (p<0.05) of collagen from barramundi skin, with UAE80 exhibiting a 7-fold increment compared to ASC. Increasing the ultrasonic amplitude increased the yield considerably but decreased the hydroxyproline content, indicating a reduction in collagen quality. Furthermore, the protein content and SDS-PAGE profile of the extracted collagens revealed that UAE promoted protein degradation. FTIR spectra indicated that despite slightly varying wavenumbers, no detrimental effect on the triple helical structure was seen following UAE with the presence of amides A, B, I, II, and III. Also, the α1, α2 and ß-chains were found in all samples, although the band intensity reduced as the amplitude increased. In conclusion, given the right conditions, UAE could improve the extraction yield without influencing the collagen structure.
The Ecological Significance of Plant Growth Promoting Rhizobacteria in Tropical Soil Kalimantan: A Narrative Review: Plant Growth Promoting Rhizobacteria in Tropical Soil Kalimantan Ervinda Yuliatin; Lutfi Fadhlillah; Ivoryta Arinda; Imam Rosadi; Nova Hariani; Linda Oktavianingsih
Journal of Tropical Life Science Vol. 13 No. 2 (2023)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.13.02.20

Abstract

The diversity of flora in Kalimantan influences the presence of microbe-associated with rhizosphere on their activities and functions in ecosystems. However, abiotic stress such as acidification, drought, and toxic soil residues negatively impacted soil health and plant growth in some regions of Kalimantan's soil. The rhizobacteria, as a group of the plant-growth-promoting rhizobacteria (PGPR), can colonize in the rhizosphere to produce their natural product in making phytohormone for root growth, maintaining soil aggregation and solubilizing the mineral in the soil. Those benefit of rhizobacteria is essential to investigate. However, the study of the role of rhizobacteria in Kalimantan soil interaction with the plant was unclear. Therefore, this review focused on the presence of rhizobacteria and their potency to solve abiotic problems in Kalimantan soil and the underlying mechanism rhizobacteria employs to tolerate harsh soil.
Proximate Composition and Antimicrobial Activity of Kefir Produced from Cow’s and Almond Milk: Proximate composition and antimicrobial activity of kefir mixtures Dr. Siti Raihanah Shafie; Jing Xuan Hew; Nurshahira Sulaiman
Journal of Tropical Life Science Vol. 13 No. 2 (2023)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.13.02.06

Abstract

Fermented foods are an important diet component of people around the world. Kefir, or fermented milk, is popular worldwide due to its high nutritional value, with cow's milk being the common substrate for traditional kefir fermentation. However, the scarcity of animal-based milk in some countries, plus cultural, religious, and health reasons, have seen non-dairy milk kefir from almond milk gaining popularity among consumers globally. This study aimed to evaluate and compare the proximate composition and anti-microbial activity of kefir produced from 100% cow or 100% almond or an equal (1:1) mixture of both kinds of milk. This study used the AOAC 2000 method for the proximate analysis, while the agar well diffusion method examined the anti-microbial activity of the milk samples against Escherichia coli, Staphylococcus aureus, and Salmonella typhi. Results revealed that the three kefir samples showed significantly different (p<0.05) moisture, total dietary fiber, and fat contents and were within the CODEX acceptable range for kefir. All samples exhibited varying degrees of inhibition between the different pathogens. The diameters of the inhibition zone of the tested kefir samples were significantly different toward Salmonella typhi (p<0.05), with the mixture of almond and cow milk notably producing better inhibition towards all tested bacteria. The above-said milk mixture also gave a better overall nutrient profile (lower fat and higher fibre). While almond milk might be a suitable substrate for kefir, it was not effectively inhibitory for all bacteria. The overall results thus conveyed the promising use of almond and cow milk mixture as an alternative substrate for kefir fermentation, further supporting its potential use as a probiotics source.

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