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EDWI MAHAJOENO
Bioscience Program, School of Graduates, Sebelas Maret University, Surakarta 57126, Central Java, Indonesia
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Effect of various sugar solution concentrations on characteristics of dried candy tomato (Lycopersicum esculentum) WAWAN BUNTARAN; OKID PARAMA ASTIRIN; EDWI MAHAJOENO
Nusantara Bioscience Vol. 2 No. 2 (2010)
Publisher : Smujo International

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/nusbiosci/n020201

Abstract

Abstract. Buntaran W, Astirin PA, Mahajoeno M. 2009. Effect of various sugar solution concentrations on characteristics of dried candy tomato (Lycopersicum esculentum). Nusantara Bioscience 2: 55-61. The aims of the research were to study the effects of sugar syrup concentration on dried candy tomato characteristics and to determine the proper sugar solution concentration that gives the best characteristics of dry candy tomatoes. The research used Randomized Block Design Method with four treatments and six times repetitions. The treatment that be used was immersing the tomato in sugar solution, with concentration of A (40%), B (50%), C (60%), and D (70%) group in 18 hours. The variables measured were water content, ash, vitamin C and organoleptic tests include flavor, color, flavor and texture test. Data were analyzed using ANOVA test (Analysis of Variance) followed by DMRT (Duncan Multiple Range Test). The result showed that sugar solution concentration had different effect on water content, ash content, vitamin C content, texture, and organoleptic test for color, taste, and flavor of the dry candy tomato. The best characteristics of dry tomato candy was obtained on A (40%) group, with water content of  24.20%, ash content of 0.62%, and vitamin C content of 31.15 mg/100 g.  Standard quality of water content for dry fruit candy was maximal 25% (SII No.0718-2003) and maximally allowed ash content for food materials was 1.0% (SII 0272.90).  Vitamin C content was not much decreased compared with ripe tomato, i.e. 30-40 mg/100. Organoleptic tets result indicated that A (40%) group get the highest score, i.e. 3,98 for taste, 3,89 for flavor, and 3,98 for color.
Exposure copper heavy metal (Cu) on freshwater mussel (Anodonta woodiana) and its relation to Cu and protein content in the body shell AHMAD INTAN KURNIA; EDI PURWANTO; EDWI MAHAJOENO
Nusantara Bioscience Vol. 2 No. 1 (2010)
Publisher : Smujo International

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/nusbiosci/n020108

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Abstract. Kurnia AI, Purwanto E, Mahajoeno E. 2010. Exposure copper heavy metal (Cu) on freshwater mussel (Anodonta woodiana) and its relation to Cu and protein content in the body shell. Nusantara Bioscience 2: 48-53. To determine the relationship of Cu exposure in water to the freshwater mussel exposure experiment is conducted with water containing Cu. Which measured the influence of Cu and protein content in the body shell. This study used the freshwater mussel species, Anodonta woodiana. Oysters were exposed for four weeks in the water with Cu concentration of 0.02 ppm, 0.04 ppm, 0.06 ppm, and 0.00 ppm control. Cu content and protein content in the body shells are checked every week. Cu analysis was done by Atomic absorption spectroscopy (AAS) method and the protein content using Kjeldahl method. Cu analysis showed elevated levels of Cu in mussel body after exposure. The pattern of increase in Cu content was not the same, where the pattern of the largest increases occurred after the fourth week. The statistical test showed no significant effect between the treatment with Cu accumulation in the body shell. Protein analysis showed an increase of protein content after exposure of the second week and decreased after the third and fourth weeks. The pattern of changes in protein content varied among the various treatments. The statistical test showed no significant effect between treatment with the protein changes in the body shell. Correlation test of the relationship between concentration of Cu in mussel body protein level showed a positive correlation between them with a fairly good level of relationship (correlation coefficient r = 0.836).
Variation of morphology, isozymic and vitamin C content of dragon fruit varieties BANATI RAHMAWATI; EDWI MAHAJOENO
Nusantara Bioscience Vol. 1 No. 3 (2009)
Publisher : Smujo International

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/nusbiosci/n010305

Abstract

Rahmawati B, Mahajoeno E. 2009. Variation of morphology, isozymic and vitamin C content of dragon fruit varieties. Nusantara Bioscience 1: 131-137. The aims of the research was to study the variation of morphology, the band pattern of isozyme, and vitamin C content of dragon fruit (Hylocereus spp.) varieties such as super red, red and white from Pasuruan (East Java), Sukoharjo and Klaten (Central Java), and Bantul districts (Yogyakarta). Morphological character were carried include fruit, stem, and flowers of each variety of dragon fruit. The isozymic pattern was analyzed using NTSYS 2.02i. The data matrix was counted based on the DICE coefficient. The clustering was done by applying UPGMA which counted through SHAN. Vitamin C content measured by titration method then analyzed descriptively. The results showed that the higher vitamin C content was found from super red of Pasuruan (6.00) and then followed by red color (5.376) and super red (5.113) both from Bantul. The morphological variation on the stem and petal colors, and fruits were also shown by the isozymic data of three varieties of dragon fruits collected from four separated locations. Esterase (EST) showed 18 bands and forming four (4) groups based on 75% genetic similarity index. The specific band occurred on Rf 0.633 of red varieties of dragon fruit from Bantul and on Rf 0.755 from Pasuruan. The specific band also occurs on Rf 0.347 of white variety from Bantul and on Rf 0.510 and on Rf 0.633 from Klaten. Glutamic oxaloacetic transaminase (GOT) enzyme shows 12 bands and also forming four groups with a little difference for member in the fourth group. The specific band occurs on Rf 0.321 of red color fruit from Pasuruan. The specific band also occurs on the white from Pasuruan on Rf 0.446 and on Rf 0.482. The variation of dragon fruits were also supported by isozymic data indicated that the morphological character were in accordance with the genetics data.
Co-Authors AHMAD INTAN KURNIA Banati Rahmawati EDI PURWANTO Okid Parama Astirin WAWAN BUNTARAN