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BUANA SAINS

buanasains
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Published by Universitas Tribhuwana Tunggadewi

ISSN : 14121638 EISSN : 25275720 DOI : -

Core Subject : Science, Education,

Biochemistry, Genetics & Molecular Biology Chemistry Mathematics Physics

BUANA SAINS p-ISSN : 1412-1638 | e-ISSN: 2527-5720 is a double-blind peer-reviewed, open-access journal, published by UNITRI PRESS. It publishes original and applied research in all areas of natural science. The Editorial goal is to provide a forum exchange and an interface between researchers and practitioners in any natural science related field.

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Articles 14 Documents

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Search results for , issue "Vol 12, No 2 (2012)" : 14 Documents clear

PEMBUNGAAN DAN PRODUKSI TANAMAN JAGUNG DI LAHAN PASIR B. Suwignyo; B.W. Pratomo; Nonok Supartini; N. Umami; B. Suhartanto
BUANA SAINS Vol 12, No 2 (2012)
Publisher : Universitas Tribhuwana Tunggadewi

The study aimed to determine fowering and production of corn planted in sandy soil. The study is based on completely randomized design (CRD) with three replications in Jangkaran Village, Temon, Kulonprogo, Yogyakarta The data were analyzed by ANOVA with SPSS advanced analysis of LSD. Treatments were plastic and bio mulch (feedstuff used), and planted with Pioneer® seed corn. Plant spacing was 25 x 50 cm. Litter manure waste was used as basal fertilizer by spreaded over the beds at the level 7.5 t/ha. Chemical fertilizers, Urea and SP-36 are given and water irrigation each day. Number of flower was observed since the first time of flowering up to harvested (10 weeks). Production was determined from total weight of whole plant harvested. Corn plant with bio mulch produced significantly higher number of flower and total whole plant compare with control but not significantly with plastic mulch. Bio mulch always has highest number of flower 34.4% compare with plastic mulch 17.7% and control 9.2. The highest production level of fresh whole plant 13.3, plastic mulch 12.93 and 3.91 t/ha

KAJIAN DAYA SANGGA BIOCHAR LIMBAH SAGU PADA PELINDIAN TERHADAP KETERSEDIAAN NPK DI TANAH ULTISOL Latuponu H; Dj. Shiddieq; Abd. Syukur; E. Hanudin
BUANA SAINS Vol 12, No 2 (2012)
Publisher : Universitas Tribhuwana Tunggadewi

This study was conducted in the greenhouse of Chemical and Soil Fertilty Lab. UGM, with the aims to find good combination of kind of biochar and NPK fertilizer and time of incubation on availability NPK in Ultisol. Randomized Complete Design was used with two factors. First factors consists of combination of biochar and NPK (control, biochar 200, 400, 600) and biochar 200+NPK, biochar 400+NPK , biochar 600+NPK.). Second factors: incubation 2 week, 4 week and 6 week. Replication was three times. The results showed that treatment of biochar 400 increased holding capasity of NPK , pH, Al-dd, CEC, Carbon, N, P and K. The best length of incubation is 4 week

OPTIMASI KONDISI PIROLISIS SAMPAH BAMBU GUNA MENDAPATKAN ENERGI TERBESAR D A. Himawanto
BUANA SAINS Vol 12, No 2 (2012)
Publisher : Universitas Tribhuwana Tunggadewi

The aim of this experiment was to evaluate optimum condition of process pyrolisis bamboo biomass to reach the highest energy. The early activities was to collect bamboo biomass and to dried untill the maximum water content around 10%, and to crash under 20 mesh. Raw material to evaluate by proximate and heating value as standart as ASTM 2015. Standart evaluation for water content used ASTM D-3173, ash value by ASTM D-3174, volatile content by ASTM D-31175 and fixed carbon content by ASTM D-3172. Pyrolisis process by used raw material about 20 g, and increased temperatures with heating rate 10oC/second untill reach final temperature 300oC, 400oC and 500oC with variation holding time 15, 30 and 45 minute. Result of the research showed that variation holding time and final temperature give the minimum energy and is due probably cracking on char

PENERAPAN FUNGSI MANAJEMEN KELOMPOK TANI DALAM AGRIBISNIS PADI SAWAH DI DISTRIK AIMAS KABUPATEN SORONG R. Silehu; E Y. Arvianti
BUANA SAINS Vol 12, No 2 (2012)
Publisher : Universitas Tribhuwana Tunggadewi

An effort has been and is being carried out by the government to increase rice production and farmers while increasing revenue in the District Aimas, as the largest rice producer in the district of Sorong, is to adopt a management function in farmer groups to improve the application of rice agribusiness. The purpose of this study to (a) Determine the influence of some management functions are implemented by farmers on the application of agri Aimas paddy in the district, Sorong regency, (b) Knowing and learning costs, revenues, benefits and feasibility of rice agribusiness Aimas District, District Sorong, (c) Knowing the factors that influence the production of rice production in the District Aimas, Sorong regency, as efforts to improve the efficient use of production factors, and (d) Determine the efficiency of rice agribusiness production factors. The results showed that the application by farmers of management functions simultaneously and significantly affect the application of partial agribusiness Aimas paddy in the district, Sorong regency.Application of management functions to contribute 66% of the variation in the application of rice agribusiness Aimas district, Sorong regency. Seen partially, a function that significantly affect the application of rice agribusiness adan planning and evaluation functions. Agribusiness rice worth it in terms of RCR value 5.53, which means that any additional production cost of Rp. 1, - will generate revenue of Rp. 5:53,-. Production factors of labor, seed, fertilizer urea, KCl fertilizer, fertilizer and pesticides SP36 simultaneously significantly affect rice production. Variations of factors of production contributed 65.8% of the variation in rice production. The dominant factor affecting rice production is labor and seed. The use of production factors of labor, seed, fertilizer and pesticides KCl inefficient and needs to be reduced its use, while. The use of urea fertilizer production factors and SP36 and yet efficient and necessary, its use to increase production

PROSES PEMBUATAN ETHANOL SEMIKONTINYU MELALUI REKAYASA ALAT FERMENTOR FLUIDISASI Fathorrahman Fathorrahman; A. Swastika S; N. Yuliana; S.P. Abrina A
BUANA SAINS Vol 12, No 2 (2012)
Publisher : Universitas Tribhuwana Tunggadewi

Bioetanol is alternative fuel substitute potentially and ethanol is a process of biomass fermentation by using microorganisms. This research is a solution of obstacles faced in fermentation process of batch, which is more commonly used ethanol that is the existance of production of ethanol which will poison microorganisms in fermentation process and even stop the growth and production of ethanol. The research result is expected to give possibility to produce technological innovation by knowing maximum results of the opening of flow rate to the ethanol productivity and efficiency process and quality of product. This technology possibly applied as effective and efficient technology for ethanol production system. The method of this research uses system of semi continue using fluidisasi fermentation using saccharomyces cerevisiae amobilzed which can improve effectiveness the process of manufacture ethanol less than 50 hours faster than conventional fermentation (in batch) commonly the results obtained only maximally 13,85 for 72 hours (3 days). The results showed that the process of semi continue fluidisasi fermentation is amobilized it done only for 24 hours and obtained 20% ethanol level of 300 opening rate of fluid flow, 22% ethanol level of 600 opening rate of fluid flow, and 23% ethanol level of 900 opening rate of fluid flow

ANALISIS USAHATANI RUMPUT LAUT DI KECAMATAN NAGAWUTUNG KABUPATEN LEMBATA Asnah Asnah; L. Latu
BUANA SAINS Vol 12, No 2 (2012)
Publisher : Universitas Tribhuwana Tunggadewi

Seaweed cultivation is one of cultivation in fishery have been increased, especially in waters of Indonesia. The aims of this research were to study the cost, revenue, income, profit, and economic efficiency of seaweed business in Nagawutung Sub District, Lembata Regency. The sample was gained by simple randomized sampling i.e. 30 farmers. The data collected were analyzed by using simple statistic analysis. The research result showed the total of cost in average in seaweed business was IDR 1,662,920.83; revenue in average was IDR 19,800,000; income in average was IDR 18,943,412.50; and profit in average was IDR 18,137,079.17. Economic efficiency value based on analysis B/C was 11.36. The value of BEP was 184.77 kg, and price BEP was IDR 803.70/kg. It is be concluded that seaweed business in Nagawutung Sub District, Lembata Regency was efficient, profitable and useful for the farmers

PENGUJIAN DAYA HASIL UBIJALAR KAYA PROTEIN S U. Lestari; R I. Hapsari; R. Djoko
BUANA SAINS Vol 12, No 2 (2012)
Publisher : Universitas Tribhuwana Tunggadewi

The performance of improved sweetpotato clones (Ipomoea batatas (L.) Lamb) in two location reported in this studies. The first location at Jatikerto-Malang Regency, from March to August 2012 and second at Sambigede-Blitar Regency, from April to September 2012. Both of the trials were done with a randomized complete block design with 3 replications. The experimental material consisted of nine sweetpotato clones. All the clones were planted in a plot size 5 m x 5 m, consisted of four rows with 75 cm between the rows, 25 cm spacing between plants within the row. The experimental plots received 100 kg N, 20 kg P2O5, and 75 kg K2O/ha in the form of Urea, SP-36 and KCl. Roots were harvested four months after transplanting. Fresh storage root yield and protein content presented in this report. Fresh storage root yield is significantly influenced by location, among improved clones ranging 7 to 21 t/ha in Malang and 5 to 18 t/ha in Blitar, two clones of them to reach 114 to 161% higher to control variety, Boko. On the contrary with protein content is not sensitive on differ locations, among improved clones ranging 6 to 7,63% dry weight basis

KARAKTERISTIK DAN KUALITAS BIOCHAR DARI PYROLYSIS BIOMASSA TANAMAN BIO-ENERGI WILLOW (SALIX SP) C. Prayogo; N D. Lestari; K S. Wicaksono
BUANA SAINS Vol 12, No 2 (2012)
Publisher : Universitas Tribhuwana Tunggadewi

Biochar now is importance issue due to complication same meaning with “charcoal”.In development country techonology convert biomass becomes energy is called “pyrolysis“ to produce several gas such as bio-oil and biochar. Biochar produce from crop ussually consist some importance nutrient, and called as “negative carbon emitter“. In this experiment characteristic and quality bichar is produce from Fluidized Bed Reactor to usefull biomass of bio energy willow (Salix sp) at diffferent temperature 450oC, 470oC and 530oC. Evaluation was made by using LECO-2000, ICP (Inductively Coupled Plasma), SEM (Scaing Electron Microscop) and FTIR (Fourier Tranfrmed Infrared).The research result showed that increased tempereture “pyrolysis“ from 440oC to 530oC signifantly affected end product chemical composition, porous content and functional point from biochar. Additing Potassium (K) and Phosphor (P) found higher content compare the original source. On the other hand, in high temperature, all functional organic source: phenol,amine,carboxylic ,aromatic and polysacharida did not detiction

PEMANFAATAN LIMBAH PERTANIAN UNTUK MENDUKUNG PENINGKATAN KUALITAS LAHAN DAN PRODUKTIVITAS PADI SAWAH Sri Karyaningsih
BUANA SAINS Vol 12, No 2 (2012)
Publisher : Universitas Tribhuwana Tunggadewi

Food demand especially rice is increased similary with populations of people and rice self sufficient program of the indonesian goverment. On the other hand rice production systems was risk due to decreases of quality and quantity agriculture land, climate change and increased pest and diseases infestations. One of new approach and technology to added value and efficiency of farming is by using agriculture biomass for organic fertilizer. Field experiment was conducted at Tegalsari village, Weru Subdistrict and Sukoharjo District during November 2009 to July 2010. The result showed that rice productivity range from 5,65 to 6,80 t/ha with avarage 6,26 t/ha. Organic fertilizer increased rice production by 17,20%, and C-organic soil content 0,30. Agriculture biomass potentially reduced applications of anorganic fertilizer by 54 kg Urea, 89 kg SP36 and 60 kg KCL per ha/year

FAKTOR YANG MEMPENGARUHI KEPUTUSAN PEMBELIAN SUSU FORMULA ANAK (BALITA) DI KOTA MALANG K S. Suroto; Z. Fanani; B A. Nugroho
BUANA SAINS Vol 12, No 2 (2012)
Publisher : Universitas Tribhuwana Tunggadewi

Various brands of formula milk offered by many companies make mothers having under five year old children difficult to make decision to buy formula milk. The purposes of this study were to analyze the simultaneous and partial effects of cultural, social, personal, psychological, product and price variables on buying decision of formula milk, and to analyze the variables having dominant influence on the purchasing decisions of formula milk at Malang City. This study was conducted at Lowokwaru, Kedungkandang, Blimbing, Sukun and Klojen Districts of Malang City from November to December 2012. The method used for this study was an explanatory survey method using questionnaires to collect data from 120 mothers having under five year old children consuming formula milk that were selected by an accidental sampling method. Data of respondents were measured using Likert Scale that ranged from 1 (strongly disagree) to 5 (strongly agree). A multiple linear regression model was used to predict the effects of culture (X1), social (X2), personal (X3), psychological (X4), product (X5) and price (X6) variables on purchasing decision (Y). The results showed that the six variables simultaneously affected significantly the purchasing decision of formula milk at Malang City. The six variables contributed 83.5% of the variation in formula milk purchasing decision. Partially, cultural, social, personal, psychological, and product variables positively influenced the purchasing decisions of formula milk, while price variabels did not significantly influence the purchasing decision of formula milk. Cultural variable was the most dominant variable affecting purchasing decision of formula milk

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