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Biosaintifika: Journal of Biology & Biology Education
Published by Universitas Negeri Semarang
ISSN : 2085191X     EISSN : 23387610     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Biosaintifika Journal of Biology & Biology Education, an electronic international journal, provides a forum for publishing the original research articles, review articles from contributors, and the novel technology news related to biological research and biological education.
Arjuna Subject : -
Articles 1,068 Documents
 61   62   63   64   65 
Screening of Acetic Acid Bacteria from Pineapple Waste for Bacterial Cellulose Production using Sago Liquid Waste Nur Arfa Yanti; Sitti Wirdhana Ahmad; Sri Ambardini; Nurhayani Haji Muhiddin; La Ode Iman Sulaiman
Biosaintifika: Journal of Biology & Biology Education Vol 9, No 3 (2017): December 2017
Publisher : Department of Biology, Faculty of Mathematics and Sciences, Semarang State University . Ro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/biosaintifika.v9i3.10241

Abstract

Bacterial cellulose is a biopolymer produced by fermentation process with the help of bacteria. It has numerous applications in industrial sector with its characteristic as a biodegradable and nontoxic compound in nature. The potential application of BC is limited by its production costs, because BC is produced from expensive culture media. The use of cheap carbon and nutrient sources such as sago liquid waste is an interesting strategy to overcome this limitation. The objective of this study was to obtain the AAB strain that capable to produce bacterial cellulose from sago liquid waste. Isolation of AAB strains was conducted using CARR media and the screening of BC production was performed on Hestrin-Schramm (HS) media with glucose as a carbon source. The strains of AAB then were evaluated for their cellulose-producing capability using sago liquid waste as a substrate. Thirteen strains of AAB producing BC were isolated from pineapple waste (pineapple core and peel) and seven of them were capable to produce BC using sago liquid waste substrate. One of the AAB strains produced a relatively high BC, i.e. isolate LKN6. The result of morphological and biochemical test was proven that the bacteria was Acetobacter xylinum. The result of this study showed that A. xylinum LKN6 can produce a high yield of BC, therefore this strain is potentially useful for its utilization as a starter in bacterial cellulose production. 
The Effects of Dose Rhizoctonia Binucleat (BNR) and Phosphorus to Nitrate Reductase Activity (NRA) and Chlorophyll of Vanilla Seedling (Vanilla planifolia Andrews) Haryuni Haryuni; Tyas Soemarah Kurnia Dewi
Biosaintifika: Journal of Biology & Biology Education Vol 8, No 2 (2016): September 2016
Publisher : Department of Biology, Faculty of Mathematics and Sciences, Semarang State University . Ro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/biosaintifika.v8i2.6328

Abstract

Vanilla (Vanilla planifolia Andrews) is one of the important exported commodities in Indonesia. Indonesia is one of top five major vanilla exporters in the world, that produce the high quality of Indonesian vanilla with high vanillin content (2.75%). The aims of this research were to determine the effects of dose binukleat Rhizoctonia (BNR) and phosphorus as well as the interaction of the nitrate reductase activity (NRA) and chlorophyll of the vanilla seedling (Vanilla planifolia Andrew). Method in this research used completely randomized factorial design, by involving two factors (dose of BNR inoculation and Phosphor). The first factor is without inoculation and inoculation BNR (M0, M1, M2, M3) wich consists of (0,5, 10, 15) g/polybag, the second factor is the dose of phosphorus fertilizer (P0, P1, P2, P3) which consists of (0, 3, 6, 9) g/polibag. The results showed that the inoculation dose of BNR and doses of phosphorus not significant and lower levels of NRA and chlorophyll while the interaction dose of BNR and phosphorus significantly and increase levels of NRA and chlorophyll of vanilla seedling. Nitrate Reductase Activity and chlorophyll has important role in metabolism process as a plant growth indicator.How to CiteHaryuni, H., Dewi, T. S. K. (2016). The Effects of Dose Rhizoctonia Binucleat (BNR) and Phosphorus to Nitrate Reductase Activity (NRA) and Chlorophyll of Vanilla Seedling (Vanilla planifolia Andrews). Biosaintifika: Journal of Biology Biology Education, 8(2), 141-147.
Plant Species Diversity and Degree of Homogeneity after the 2010 Eruption of Mount Merapi, Indonesia Whisnu Febry Afrianto; Agus Hikmat; Didik Widyatmoko
Biosaintifika: Journal of Biology & Biology Education Vol 12, No 2 (2020): August 2020
Publisher : Department of Biology, Faculty of Mathematics and Sciences, Semarang State University . Ro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/biosaintifika.v12i2.23525

Abstract

The eruption in 2010 of Merapi Mount changed the diversity of plant species. The objective of this research was to investigate the diversity of plant species on Mount Merapi National Park (MMNP). The sampling area was divided into three different levels of damage (heavy, medium, and mirror). The research was conducted by using line-transect and quadrat method.  We were conducted using line-transect and quadrat method. The research showed that Acacia decurrens has the highest Important Value Index (IVI) at the heavy damage area of Cangkringan Resort (CR) and Kemalang Resort (KR) as well as in mirror damage area of Selo Resort (SR). The most important species at medium damage area of Dukun Resort (DR) were Albizia lopantha and Pinus merkusii. The pioneer species at Non-Cover Area (NCA) among others were Trema cannabina, Pityrogramma calomelanos, Imperata cylindrical, Buddleja asiatica, Anaphalis javanica. Eupatorium riparium were the most important species of herb in all four locations based on SIMPER, but it was not dominant in NCA. The homogeneity of plant in Cangkringan Resort and Selo Resort (C D E) were normally distributed, whereas NCA, DR, and KR (E ≥ D) were homogeneous. Analysis of non-metric multidimensional scaling and value of ANOSIM (RANOSIM =0.69; p = 0.0001) demonstrated that all site locations have significance differences. This research was not only focusing on survey of vegetation diversity, but also frequency class distribution. Through this study of frequency of species provides a database for conservation biodiversity and restoration program.
Phytochemicals Screening and Antioxidant Effectiveness of Garlic (Allium sativum) from Timor Island Melania Priska; Natalia Peni; Ludovicus Carvallo
Biosaintifika: Journal of Biology & Biology Education Vol 11, No 1 (2019): April 2019
Publisher : Department of Biology, Faculty of Mathematics and Sciences, Semarang State University . Ro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/biosaintifika.v11i1.17313

Abstract

The people of Timor Island only know garlic as a kitchen spice. This research provides new knowledge of the benefits of garlic in the health sector, especially as an inhibitor of free radical that can trigger various degenerative diseases. The aims of this research were to identify secondary metabolites contained in the ethanolic extract of garlic (Allium sativum L.) from Timor Island and to determine its effectiveness in inhibiting free radicals. The method used to test secondary metabolites was phytochemical screening using color reagents. Testing the effectiveness of free radical inhibitors from garlic ethanol extract from Timor Island was carried out in 2 stages: 1.) Determination of DPPH maximum wavelength (λ) and 2.) Measurement of antioxidant activity using DPPH method. The results showed that the ethanolic extract of garlic from Timor Island contained secondary metabolites of flavonoids, phenols and terpenoids. It was also very effective in inhibiting free radicals, with the acquisition of IC50 values 50 ppm which was equal to 9.729 ppm. This research gives some information that can be used for the pharmacological ingredients, i.e. as a natural medicine that safe for the body to be consumed by the people of Timor Island. Moreover that also can impact on demand of garlic in the market. This has a very positive impact on improving the economy of garlic farmers on Timor Island.
Genetic Variation of Hampala Fish (Hampala macrolepidota) Population in PB. Soedirman Reservoir and Serayu River Suhestri Suryaningsih; Sorta Basar Ida Simanjuntak; Sri Sukmaningrum
Biosaintifika: Journal of Biology & Biology Education Vol 10, No 1 (2018): April 2018
Publisher : Department of Biology, Faculty of Mathematics and Sciences, Semarang State University . Ro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/biosaintifika.v10i1.12092

Abstract

Panglima Besar Soedirman waters reservoir and the Serayu River in Banjarnegara Regency, Central Java is one of the habitats of hampala fish . Hampala fish is a member of the Cyprinidae family, which has economic value but is fully captured from the wild. The study on the genetic diversity using approaches of isozyme analysis needed to support conservation and domestication of the fish in this area. This study was aimed at the genetic variation of the hampala fish population in PB. Soedirman water reservoir and the Serayu River in Banjarnegara Regency based on esterase (EST), acid phosphatase (ACP), peroxidase (PER), and aspartate aminotransferase (AAT). Visualization of the isozyme was carried out employing horizontal electrophoretic technique with potato starch. From the results of this study it can be concluded that the hampala fish from the reservoir of PB. Soedirman, Serayu River area before reservoir and after reservoir, all of which are in Banjarnegara Regency, can visualized isozymes EST, ACP, and AAT well, except PER isozyme. This finding can be used as based information on population genetics and finally can be used for conservation of this fish. The results of this study are expected to be utilized to evaluate the potential genetic condition of hampala fish, which is the basis for conservation strategy and domestication.
Types of Rats and Their Parasites That Potential to Transmit Disease in Tugu District, Semarang City Ning Setiati; Rusyda Auliya; Partaya Partaya; F. Putut Martin Herry Bodijantoro; Dyah Rini Indriyanti; Priyantini Widiyaningrum
Biosaintifika: Journal of Biology & Biology Education Vol 13, No 3 (2021): December 2021
Publisher : Department of Biology, Faculty of Mathematics and Sciences, Semarang State University . Ro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/biosaintifika.v13i3.33460

Abstract

Rats are known as vectors and reservoirs for various types of ecto and endoparasites. The existence of rats as cosmopolitan animals allows for complex parasitic transmission due to the relationship between humans, animals, and the environment. This study aimed to provide informative data on the types of rat along with their ecto- and endoparasites. This research is a qualitative descriptive study. Data collection was carried out by random sampling survey with a point time approach. Data collection was carried out in 4 villages, namely Tugurejo, Mangkang Wetan, Mangunharjo, and Mangkang Kulon Villages, Tugu District, Semarang City. A total of 89 rats were obtained, the species obtained were R. norvegicus, R. argentiventer, R. exulans, R. tiomanicus, R. surifer, R. tanezumi, B indica, and S. murinus. Ectoparasite infestation was found in all types of rats except S. murinus. The ectoparasites found were Xenopsylla cheopis and Laelaps echidninus which were reported as the main vectors of murine typhus, epidemic typhus, bartonellosis as well as scrub typhus and Q-fever disease. Endoparasite infestation was found in the intestinal organs, namely Diphyllobothrium sp. and two species of worm eggs Hymnoepis sp. and Trichuris trichiura which were reported as the cause of Diphyllobothriasis as well as digestion, absorption, which can result in the loss of protein, carbohydrates, fats, and blood in large quantities. Diphyllobothriasis is not transmitted from person to person, more than one family member can be infected by sharing common meals and having similar eating habits. This study can be used as an early warning for community against the potential of infectious diseases from rats as vectors in Tugu District, Semarang related to rats density, endoparasites and their ectoparasites.
Aktivitas Enzim Nitrat Reduktase Kedelai Kultivar Burangrang akibat Variasi Kadar Air Tanah pada Awal Pengisian Polong Junica Fitriana; Krispinus Kedati Pukan; Lina Herlina
Biosaintifika: Journal of Biology & Biology Education Vol 1, No 1 (2009): March 2009
Publisher : Department of Biology, Faculty of Mathematics and Sciences, Semarang State University . Ro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/biosaintifika.v1i1.36

Abstract

An experiment has been conducted from February 2008 to April 2008. The objective of this research was to analize the influence of a variety of water levels to the activity of nitrate reductase enzyme (NRA) and the production of soybean (Glycine max) var. Burangrang, and to analize the correlations between the NRA and the production. Cultivar Burangrang was the main subject of the experiment. The application of the treatment was followed by the complete random design consisting of one factor with three replicates. The factor was the water levels of field capacity, 90%, 70%, 50%, 30%, and 10% of the field capacity. Every replicate consisted of 8 treatment units, and thus the whole of treatment units were 144. The water level treatment was given once per day. NRA is calculated based on the amount of nitrite produced from an assay. Nitrate was reacted using 1% sulfanilamide in 3N HCL and 0.02% napthylethylendiamide. The color was then determined using spectrophotometer at 540 nm. The result of the research indicated that the administration of water at 90% of field capacity resulted in the highest average of NRA due to good water efficiency. The best average of water efficiency for production was obtained from the variety of water quality of 70%. So it can be concluded that variety of water quality had significant influence to NRA and production. NRA had positif correlation with production. Key words: activities nitrate reductase, soybean, water quality.
Various Plants of Traditional Rituals: Ethnobotanical Research Among The Baduy Community Johan Iskandar; Budiawati S. Iskandar
Biosaintifika: Journal of Biology & Biology Education Vol 9, No 1 (2017): April 2017
Publisher : Department of Biology, Faculty of Mathematics and Sciences, Semarang State University . Ro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/biosaintifika.v9i1.8117

Abstract

On the basis of recent studies in many places of developing countries it has been revealed that the practices of conservation of biodiversity has strongly determined by traditional ecological knowledge, and beliefs or cosmos. The aim of the study namely to elucidate; (1) some traditional rituals in the swidden management system of the Baduy community; (2) various plants that have been  used for performing some rituals in the swidden management system of the Baduy community; and (3) some functions of various plants that have been used in the rituals of the swidden management system of the Baduy community. A qualitative method with ethnobotanical approach was applied in this study. The result of study shows that 9 kinds of the traditional rituals that have been predominantly undertaken by the Baduy community in the management of swidden farming system. At least 50 plant species representing 28 families have been used for those performing traditional rituals. The main function of plants in the rituals is considered as the symbolic meaning and rational function. The result of study has been considered very important that the traditional ecological knowledge and beliefs must be considered to conserve biological diversity.   
Optimasi Konsentrasi 2,4-D, Ba, dan Lama Penyinaran untuk Memacu Regenerasi Tunas dari Kalus Kedelai Intan Kristanti; Noor Aini Habibah; Lina Herlina
Biosaintifika: Journal of Biology & Biology Education Vol 5, No 1 (2013): March 2013
Publisher : Department of Biology, Faculty of Mathematics and Sciences, Semarang State University . Ro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/biosaintifika.v5i1.3923

Abstract

Alternatif untuk mengatasi kualitas kedelai yang rendah yaitu perbaikan sifat genetik. Penelitian ini bertujuan untuk mengetahui pengaruh konsentrasi 2,4-Dichlorophenoxyacetic Acid (2,4-D) dan Benzyl Adenine (BA) serta lama penyinaran dan interaksinya terhadap regenerasi tunas dari kalus kedelai, dan untuk menentukan interaksi faktor-faktor yang paling optimal dalam regenerasi tunas dari kalus kedelai. Konsentrasi 2,4-D dan BA masing-masing terdiri dari 4 taraf (0 ppm; 3 ppm; 6 ppm; 9 ppm) dan 2 taraf lama penyinaran (24 jam dan 0 jam). Analisis menggunakan ANAVA tiga arah dan uji lanjut Duncan. Parameter yang diamati adalah waktu muncul tunas, panjang tunas, jumlah tunas, dan persentase kalus membentuk tunas. Hasil menunjukkan bahwa konsentrasi BA dan lama penyinaran mempengaruhi regenerasi tunas dari kalus kedelai, sedangkan konsentrasi 2,4-D tidak berpengaruh signifikan terhadap regenerasi tunas. Konsentrasi BA yang paling optimal adalah 3 ppm dan lama penyinaran yang optimal adalah kondisi 0 jam. Interaksi konsentrasi BA, 2,4-D dan lama penyinaran berpengaruh terhadap regenerasi tunas terutama pada banyaknya jumlah tunas yang dihasilkan. Perlakuan BA 3 ppm + 2,4-D 6 ppm + 24 jam adalah perlakuan yang optimal dalam meregenerasi tunas dengan jumlah kalus yang banyak. Berdasarkan hasil penelitian disarankan untuk meregenerasi kalus menggunakan ZPT BA dan 2,4-D dan Lama penyinaran.Genetic trait improvement is a way to overcome the low quality soybean. The aim of this research is to determine the effect of 2,4-Dichlorophenoxyacetic Acid (2,4-D) and Benzyl Adenine (BA) concentration and long irradiation and their interaction on bud regeneration from callus soybean, and to determine the interaction of the factors that most optimal in bud regeneration from callus soybean. 2,4-D and BA concentration each consisting of 4 levels (0 ppm; 3 ppm; 6 ppm; 9 ppm) and 2 levels long irradiation (24 hours and 0 hour). Analysis using a three -way ANAVA and Duncan test further. Parameters measured were the time appears bud, bud length, number of buds, and the percentage of callus forming buds. The result showed that BA concentration and long irradiation affects the regeneration of shoots from callus soybean, whereas the concentration of 2,4-D had no significant effect on bud regeneration. The most optimal concentration of BA is 3 ppm and optimal long irradiation is the condition 0 hours. BA concentration, 2,4-D concentration and long irradiation interaction effect on the regeneration of buds mainly on the number of buds produced. Treatment BA 3 ppm + 2,4-D 6 ppm + 24 hours is the optimal treatment in regenerating buds the number of callus that many. Based on the research results suggested to regenerate callus using ZPT BA and 2,4-D and long irradiation.
Characteristics of DNA Barcodes from Three Thrixspermum Orchids Based on ITS2 Regions Siti Rohimah; Tri Ratnasari; Mukhamad Su’udi
Biosaintifika: Journal of Biology & Biology Education Vol 12, No 3 (2020): December 2020
Publisher : Department of Biology, Faculty of Mathematics and Sciences, Semarang State University . Ro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/biosaintifika.v12i3.23737

Abstract

Thrixspermum (T.) is one of the genus in Orchidaceae that has small flowers. Among species in this genus has a high homology and also has many synonyms. Identification using morphological characters can be constrained since Thrixspermum flowering time occurs in a very short period. This study aimed to conduct molecular-based identification of Thrixspermum orchids using DNA barcoding. This method applied molecular-based species identification technique using DNA sequences from genomic fragments that are considered fast, accurate, and consistent. The molecular markers used were Internal Transcribed Spacer 2 (ITS2), while the samples used were T. centipeda, T. lucidum, and T. angustifolium. BLAST results show that T. centipeda has a close relationship with T. centipeda from Malaysia (KX679332) with 99.79% percent identity, T. lucidum has a high homology with T. linusii (KX679333; 97.30%), while T. angustifolium has a high homology with T. triangulare (KX679348; 99.38%). There is a unique sequence that only T. lucidum and T. angustifolium have that distinguishes the two from other species. ITS2 can be recommended as a molecular marker for determining the Thrixspermum orchid barcode. The benefit obtained from this research is the DNA barcode sequences (ITS2) of Thrixspermum orchids would be very useful to enrich the plant barcodes database for further molecular taxonomy and biodiversity of orchid. 

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