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INDONESIA
Jurnal Penelitian Saintek
Published by Universitas Negeri Yogyakarta
ISSN : 14123991     EISSN : 25287036     DOI : 10.21831
Core Subject : Science,
Decision Sciences, Operations Research & Management
Arjuna Subject : -
Articles 4 Documents
 1 
Search results for , issue "Vol 12, No 2: Oktober 2007" : 4 Documents clear
CHANGES OF COLOR AND P-KAROTEN RATE IN THE UBI.JALAR (IPOMEA BATATAS, L) FLOWS BLEACHING Regina Tutik Padmaningrum; M. Pranjoto Utomo
Jurnal Penelitian Saintek Vol 12, No 2: Oktober 2007
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (15650.019 KB) | DOI: 10.21831/jps.v12i2.5457

Abstract

he researh to stuJlythe influence of the kinds and the concentrations of bleach solution to the co1lientof fJharoten and the color ofjaw a sweet potato flour has been done. Yellowjawa sweet potato was used in this reseach. This reseon:h was a descripstive qualitative research. The subject of the researdt was jawa sweet potato and the object was jawa sweet potato flourquantities  including the content of fi-charotenand the color of theflour.. TIre independen: variables were the kinds .and the concentrations of bleach solution. and the dependent variableswere the con/ell!offJ-charoten ami.the color ofjawa sweet potato flour. In  1.00% bleach solllliDn. the costen:  of fi-charoten  with sodium sulfite,  sodium  bisulfite.  Co(OHJ!l.   ascorbic  acid  were: 2.18985,1.40835, 2.25795 and 0.78315 mgllOO grams flour  respectively. In1.00% bleach solution. the color of soaked jawa sweet potato flour  in sodium sulfite, sodium bisulfite,. Ca(OH);]ascorbic acid were: red (R= 0.3) =yellow (Y = 0.7). red (R = O.2)-yeJlow (Y = 0.5), red (R = 0.5)-yellow(Y=   1.0)andred(R=0.1)-yeHow(R     = 1.2) respectively. Theresearch showed that the concentration of bleach solution influencedsignificantly the content of fJ-cIwroten and the color of jawa  sweet potato flour. The concentration ofbead: solution tat yielded the bigest content offJ-charotenwas LOW"". 
EFFECT OF TIME FERMENTATION OF SOYBEAN TEMPE TO TRIPSIN ACTIVITY Retno Arianingrum; Eddy Sulistyowati; Das Salirawati
Jurnal Penelitian Saintek Vol 12, No 2: Oktober 2007
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (8927.357 KB) | DOI: 10.21831/jps.v12i2.5458

Abstract

The aim of the research is to study  the effect of the duration of fermentation process toward the content of soluble protein in tempe from soybean, and the activity of trypsin enzym toward that protein.The content of soluble protein was analyzed by Lowry method using casein as solution standard, and the tripsin activity was determined by Anson method. The duration offermentation process were 0,24,48,72, 96, and 120 hours. The research indicated that the content ofsoluble protein in tempe duringfermentation process for 0, 24, 48, 72,96, and  120 hours were 0.172;  0.212; 0.217; 0.212; 0.197, and0.158% (wlw) respectively, and the activity of trypsine toward the that soluble protein were 1.35; 2.33; 2.73; 2.13; 1.17 and o. 78 unit. It was indicated that the duration of fermentation process  influenced thecontent of soluble protein and tripsin activity. The highest of trypsin activity was infermentation process for 48 hours.
SEPARATION AND ELEMENTATION OF DIMER STILBENOID STRUCTURE OF VATICA LIGHT STEEL UMBONATA BURCK (DIPTEROCARPACEAE) Sri Atun
Jurnal Penelitian Saintek Vol 12, No 2: Oktober 2007
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (6806.406 KB) | DOI: 10.21831/jps.v12i2.5544

Abstract

Three oligostilbenoid, namely (-)-ampelopsin F (1), laevifonol (2), ande-viniferin (3) had been isolated and elucidated these structure from the stem bark of  Vatica umbonata Burck (Dipterocarpaceae). The structure of three compounds were elucidated based on physical and spectroscopic data UV,JR,  IH and HCNMR, HMBC, HMQC, COSY, andNOESY.
PLANT GROWTH RESPONSE ONLY (LACTUCA SATIVA L.) ON MEDIA USING VERMIKOMPOS WASTE CULTIVATION OF MUSHROOM CUSHION Suhartini Suhartini
Jurnal Penelitian Saintek Vol 12, No 2: Oktober 2007
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (11726.034 KB) | DOI: 10.21831/jps.v12i2.5396

Abstract

'l7Iis research  is  done  to  know  the  influences  of  the  maturity vemUcompost level of mushroom cultivated waste on the growth of se/ada, to know the influences of the combination between soil and vermicompost of mushroom cultivated waste on the growth of selada, to know the influences of interaction between vermicompost maturity level and the combination between soil and vermicompost on the growth of selada and to know what the vermicompost of mushroom cultivated waste can be used as organicfertiliser of seiada cultivation. This research is done to know the response of selada crop planted on dijJerentmaturation vermicompost media. The preparation that must be done before areproduce vermicompost and breeding of selada crop and analise ofvermicompost.The dependent variabel of this research is maturation vermicompostlevel (composted during 1month), half maturity (composted duringtwo months) and mature (composted during 3 months). The combination between soil  and compost is 2:1,  3:1  and 4:1.  The independent variabel is the growth of Selada that include wet weight (gram), high of crop (em), number of leaf (piece), and dry weight of crop (gram). The data of the research result of crop growth analysed using completly random design factorial.  When there is a significant different continued with Duncan Multiple Range Test}. The quality of product examined by test quality of crop vegetable.Based on the research result can be concluded  that the maturity vermicompost level of mushroom cultivated waste influences the cropgrowth by using of wet weight, dry weight, number of leaf and high of crop. The maturity vermicompost level give the significant different on all of the independent variable. The maturity level give the best growth. The comparation between soil and vermicompost 2:1; 3: 1; and 4:1; the 3:1 comparation gives the highst value for  wet weight and d weight.  .Whilefor.  the  high  of  crop and  the  number  of  leaf  tZ c~mpartwn  of  SOli   and  vermicompost  dont  give  the  significant difJere~t. Ba~ed on that result the best use ofvermicompost  is 3:1. There.ls n~t interaction between vermicompost maturity level and the combination between soil and vermicompost on the growth of selada. Based on the result of analise the vermicompost and the response of the growth of selada, so that the vermicompost of mushroom cultivated waste can be used as organicfertiliser ofselada.

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