cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Ivandini Tribidasari A.
Contact Email
ivandini.tri@sci.ui.ac.id
Phone
+622129120943
Journal Mail Official
editor_mss@ui.ac.id
Editorial Address
Directorate of Research and Community Engagement UNIVERSITAS INDONESIA UI Campus, Depok 16424 Indonesia
Location
Kota depok,
Jawa barat
INDONESIA
Makara Journal of Science
Published by Universitas Indonesia
ISSN : 23391995     EISSN : 23560851     DOI : https://doi.org/10.7454/mss
Core Subject :
Makara Journal of Science publishes original research or theoretical papers, notes, and minireviews on new knowledge and research or research applications on current issues in basic sciences, namely: Material Sciences (including: physics, biology, and chemistry); Biochemistry, Genetics, and Molecular Biology (including: microbiology, physiology, ecology, taxonomy and evolution); and Biotechnology.
Arjuna Subject : -
Articles 880 Documents
 25   26   27   28   29 
Solution of Dirac Equations for Cotangent Potential with Coulomb-type Tensor Interaction for Spin and Pseudospin Symmetries Using Romanovski Polynomials Cari, Cari; Deta, Utama Alan; Werdiningsih, Intan Saraswati
Makara Journal of Science Vol. 17, No. 3
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Solution of Dirac Equations for Cotangent Potential with Coulomb-type Tensor Interaction for Spin and Pseudospin Symmetries Using Romanovski Polynomials
Isolation and Identification of Airborne Bacteria Inside Swiftlet Houses in Sarawak, Malaysia Sien, Leong Sui; Chuan, Chia Hwa; Lihan, Samuel; Yee, Ling Teck
Makara Journal of Science Vol. 17, No. 3
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Air consists of such microorganisms as bacteria, fungi, and viruses. Exposure to these airborne bacteria indoors may cause infectious and noninfectious adverse health effects. However, the sources and origins of bacteria are not fully understood. The aim of this study was to isolate and identify the bacteria present in the air inside swiftlet houses located in Kota Samarahan, Saratok, Betong, Maludam, Miri, Kuching, Semarang, Sepinang, Sarikei, and Sibu in Sarawak, Malaysia. A total of 100 bacterial isolates from 20 samples were collected from swiftlet houses. The bacteria present in the air were collected using Plate Count Agar. Two plates were exposed at the front and back inside swiftlet houses for 15 sec and then incubated at 37 ± 1 oC for 24 h. The 16S rRNA analysis method was used to identify the isolates from the samples. The air inside the swiftlet houses had a total mean airborne bacteria colony count of 2.02 ± 0.72 log10 cfu/m2 /sec; the highest was in Miri (3.08 ± 0.29 log10 cfu/m2 /sec), and the lowest was in Sibu (1.05 ± 0.85 log10 cfu/m2 /sec). Twenty-seven bacteria species were identified, and Lysinibacillus sp. B4 (16%) was most frequently isolated
Effect of a Combination of Extract of Centella asiatica L. Leaves and Extract of Green Coffee (Coffea canephora robusta P.) Beans in a Cream Preparation for Grade 1-3 Cellulite and Slimming Primastuti, Riska Febriadne; Wih, Wong Lip; Mun’im, Abdul
Makara Journal of Science Vol. 17, No. 1
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

An accumulation of fat in the subcutaneous tissue causes cellulite and dimpling on the surface of the skin. Although not related to obesity, obesity worsens cellulite. There are abundant topical anticellulite creams on the market, but the efficacy of these creams has not been scientifically proven. A combination of Centella asiatica L. leaves extract and green coffee (Coffea canephora robusta P.) bean extract in a cream preparation was clinically tested in 30 women for 84 days in the absence of diet and exercise. The descriptive-true experimental before (T-0)-after (T-84) method was used to classify the cellulite (grade 1–3) and to determine the slimming effect. The cellulite appearance and the body circumferences (abdominal and thigh) perimeters were photographed 5cm and 10cm below the navel and below the gluteal fold. The results of before and after the treatment showed that grade 1 cellulite lower (p < 0.000), the measurement of abdominal circumference showed reduction (p < 0.013), but the measurement of both thigh circumference showed insignificantly reduction (p < 0.512). The combination of both extracts reduce cellulite and fat deposits in the abdominal area, making the volunteers look slimmer
Identification of Gene Resistance to Avian Influenza Virus (Mx Gene) among Wild Waterbirds Elfidasari, Dewi; Solihin, Dedy Duryadi; Soejoedono, Retno Damayanti; Murtini, Sri
Makara Journal of Science Vol. 17, No. 1
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The Mx gene is an antiviral gene used to determine the resistance or the susceptibility to different types of viruses, including the Avian Influenza (AI) virus subtype H5N1. The AI virus subtype H5N1 infection in chickens causes Mx gene polymorphism. The Mx+ gene shows resistant to the AI virus subtype H5N1, whereas the Mxgene shows signs of susceptible. The objective of this research was to detect the Mx gene in wild aquatic birds using the Polymerase Chain Reaction-Restriction Fragment Length Polymorphism (PCR-RFLP) method with the primer pairs F2 and NE-R2/R and the RsaI restriction enzyme. DNA samples were obtained from eight species of wild waterbirds with positive and negative exposure to the AI virus subtype H5N1. DNA amplification results showed that the Mx gene in wild aquatic birds is found in a 100 bp fragment, which is the same as the Mx gene found in chickens. However, unlike chickens, the Mx gene in wild aquatic birds did not show any polymorphism. This study proves that Mx- based resistance to AI virus subtype H5N1 in different in wild birds than in chickens.
Effectiveness of Iron Fortification on Soy-Based Foods Using Ferrous Bisglycinate in the Presence of Phytic Acid Yunarti, Rika Tri; Zulys, Agustino; Harahap, Lina Yuliana; Pramukti, Mai Saroh Ambar
Makara Journal of Science Vol. 17, No. 1
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Determining the Source Parameters of the Jambi Earthquake (1 October 2009, Mw=6.4) Using Three-Component Local Waveforms Madlazim, Madlazim
Makara Journal of Science Vol. 17, No. 1
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The purpose of this research was to estimate the source parameters of a mainshock earthquake (Mw=6.4) that occurred on 1 October 2009 in the Dikit major segment of the Sumatran Fault Zone (SFZ). The source parameters were analyzed by the inversion of three-component local waveforms recorded by the GEOFON broadband IA network. Moment tensor of the event was determined using the Discrete Wave number method to calculate the Green function and the iterative deconvolution method to invert the moment tensors. From the analysis, we obtained the fault parameters of the mainshock, which are strike=324°, dip= 80° and rake= -173°. Abstra
Bioconcentration Factor of Copper (Cu), Lead (Pb), and Zinc (Zn) in Anadara indica Related to the Water Quality in Coastal Areas Takarina, Noverita Dian; Bengen, Dietriech Geoffrey; Sanusi, Harpasis Slamet; Riani, Etty
Makara Journal of Science Vol. 17, No. 1
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The Garapan river mouth forms part of the Tanjung Pasir coastal area. This region receives materials not only from coastal waters but also from domestic sewage and industrial wastewater that contains heavy metals such as Cu, Pb, and Zn. On the contrary, the Cibungur river mouth in the different coastal area, receives relatively lower amounts of domestic sewage and industrial wastewater. The objective of this study was to determine the Cu, Pb, and Zn content in the coastal sediment as well as the levels of A.indica and their relationship with water quality parameters. Samples were collected from four stations located in the Garapan and Cibungur river mouths and were analyzed for metal content using atomic absorption spectrometry Shimadzu 6300. Samples of A. indica found in the field are categorized into three diferent size classes. It is because size related to heavy metal accumulation. Results showed that bioconcentration factor (BCF) values were Zn>Cu>Pb in both locations. Small size A. indica tends to have higher values of BCF for Cu and Zn compared to medium and larger sized samples. Furthermore, the BCF values of Cu, Pb, and Zn in A. indica were higher when the sediment had a lower concentration of organic matter.
Purification of Biotransformation Products of Cis-Isoflavan-4-ol by Biphenyl Dioxygenase of Pseudomonas pseudoalcaligenes KF707 Strain Expressed in Escherichia coli Sulistiyani, Tri Ratna
Makara Journal of Science Vol. 17, No. 1
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Isoflavone has multiple beneficial effects on human health, especially through its antioxidant and anticancer activities. The biotransformation of isoflavone using byphenyl dioxygenase could be performed to extend the diversity of flavonoids and to improve their biological and physiological properties. Biotransformation of two enantiomers (3R, 4R)-cis-isoflavan-4-ol and (3S, 4S)-cis-isoflavan-4-ol by E. coli JM109 (pJHF108) carrying a biphenyl dioxygenase gene from P. pseudoalcaligenes KF707 produced two products, designated as CM1 and CM2. The products had a retention time of 11.9 and 14.6 min, respectively, and the same absorption peaks at 204, 220, and 275 nm. CM1 and CM2 had [M-H2O+H]+ at m/z 225. Based on the molecular mass and hydrolysis products, we proposed that epoxidation occurred on cis-isoflavan-4-ol. Chloroform extraction instead of ethyl acetate extraction was performed to improve the stability of cis metabolites, CM1 and CM2.
Enzymatic Synthesis of Sucrose Polyester as Food Emulsifier Compound Handayani, Sri; Novianingsih, Ika; Barkah, Awaliatul; Hudiyono, Sumi
Makara Journal of Science Vol. 16, No. 3
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Sucrose polyester (SPE) is a carbohydrate ester compound that has diverse functions, from surfactant to low-calorie food products. Sucrose fatty acid ester with the degree of substitution 1-3 can be used as emulsifier in foods and cosmetics. The enzymatic synthesis of sucrose polyesters can be carried out using lipase in organic solvent and contain small amount of water. In this study sucrose esters were synthesized by esterification reaction between sucrose with fatty acids from coconut and palm oil using Candida rugosa lipase in n-hexane. Optimization esterification reaction was carried out for parameters of incubation time, temperature, and the ratio of the substrate. The optimum incubation time was at 18 hours for coconut oil and 12 hours palm oil, the optimum temperature was 30 o C for coconut and palm oil, and the mole ratio of fatty acid to sucrose was 40:1 for coconut oil and 64:1 for palm oil. Esterification products were characterized by FT-IR. The FT-IR spectrum showed the ester bond was formed as indicated by the wave number 1739.79/cm. Esterification products have 2 substitution degrees.
Photocatalytic Decolorization of Acid Red 4 Azo Dye by Using Immobilized TiO2 Microparticle and Nanoparticle Catalysts Sugiyana, Doni; Soenoko, Bambang; Handajani, Marisa; Suprihanto, Suprihanto
Makara Journal of Science Vol. 16, No. 3
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This research studied the synthesis of immobilized TiO2 microparticle and nanoparticle catalyst materials and evaluated its photocatalytic activity on the decolorization of Acid Red 4 (AR4) azo dye solution. TiO2 microparticles were immobilized on an acrylic plate, while TiO2 nanoparticles were immobilised on a glass plate. TiO2 nanoparticles were embedded in a nanofiber support layer to enhance photocatalytic performance, forming a nanofiber-nanoparticle composite on the glass plate. In the catalyst load 2.0 g/l, the performance of the photocatalytic layer of immobilized catalyst (k '= 0.013/min) was better than that of the suspended catalyst (k' = 0.008/min). Photocatalytic decolorization efficiency of TiO2 immobilized catalysts of nanoparticle sized reached 82.3% in irradiation time of 2 hours, which was higher than microparticle sized catalysts (77.8%). The technique of TiO2 nanofiber–nanoparticle composite showed improved photocatalytic kinetics (k’= 0.018/min) compared to a single layer of nanoparticle catalyst (k'= 0.015/min). Immobilized TiO2 catalysts remain effective with repeated use despite a slight decrease in processing efficiency.

Page 27 of 88 | Total Record : 880

 25   26   27   28   29 

Filter by Year

2002 2025


Reset
Filter By Issues
All Issue Vol. 29, No. 3 Vol. 29, No. 2 Vol. 29, No. 1 Vol. 28, No. 4 Vol. 28, No. 3 Vol. 28, No. 2 Vol. 28, No. 1 Vol. 27, No. 4 Vol. 27, No. 3 Vol. 27, No. 2 Vol. 27, No. 1 Vol. 9, No. 1 Vol. 26, No. 4 Vol. 26, No. 3 Vol. 26, No. 2 Vol. 26, No. 1 Vol. 25, No. 4 Vol. 25, No. 3 Vol. 25, No. 2 Vol. 25, No. 1 Vol. 24, No. 4 Vol. 24, No. 3 Vol. 24, No. 2 Vol. 24, No. 1 Vol. 23, No. 4 Vol. 23, No. 3 Vol. 23, No. 2 Vol. 23, No. 1 Vol. 22, No. 4 Vol. 22, No. 3 Vol. 22, No. 2 Vol. 22, No. 1 Vol. 12, No. 1 Vol. 21, No. 4 Vol. 21, No. 3 Vol. 21, No. 2 Vol. 21, No. 1 Vol. 20, No. 4 Vol. 20, No. 3 Vol. 20, No. 2 Vol. 20, No. 1 Vol. 19, No. 4 Vol. 19, No. 3 Vol. 19, No. 2 Vol. 19, No. 1 Vol. 18, No. 4 Vol. 18, No. 3 Vol. 18, No. 2 Vol. 18, No. 1 Vol. 17, No. 3 Vol. 17, No. 2 Vol. 17, No. 1 Vol. 16, No. 3 Vol. 16, No. 2 Vol. 16, No. 1 Vol. 15, No. 2 Vol. 15, No. 1 Vol. 14, No. 2 Vol. 14, No. 1 Vol. 13, No. 2 Vol. 13, No. 1 Vol. 12, No. 2 Vol. 11, No. 2 Vol. 11, No. 1 Vol. 10, No. 2 Vol. 10, No. 1 Vol. 9, No. 2 Vol. 8, No. 3 Vol. 8, No. 2 Vol. 8, No. 1 Vol. 7, No. 3 Vol. 7, No. 2 Vol. 7, No. 1 Vol. 6, No. 3 Vol. 6, No. 2 Vol. 6, No. 1 More Issue