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All Journal Jurnal Penelitian Saintek Jurnal Sains Dasar Indonesian Journal of Chemistry and Environment Jurnal Elemen Kimia Jurnal Riset Pembelajaran Kimia

M. Pranjoto Utomo

Universitas Negeri Yogyakarta

Author-ID : 409112

Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Education Materials Science & Nanotechnology

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Title

NITROGEN ADSORPTION OF URINE WITH ZEOLITE M.Pranjoto Utomo; Endang Widjajanti; Kun Sri Budiasih
Jurnal Penelitian Saintek Vol 15, No 1: April 2010
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Tlte aints of the research v,ere to determine the nitrogen contained in humatt ttrine before and after ipplying zealyte ancl to determine the influence o.f MgO to nitrog'n contained in human urine. The tJetermination ofZeolyte aclsorptio capacity' to nitrogen contained in htrmqn trrine inclLtcled 3 s'teps. Activation ol' nature zeolf ie'nitrogen adsorptiort' Iotal nin"ogen determination Ly Kjeclahl test. Zeolyte activation wqs done by soaking zeollte itio0' 1 14 HCl, HNO: and H2soafor I hour and calcin(ltedJbr t hours at 100"c. The adsorption proses adding y,as clone byaicting inactivated ancl activated zeolyte tuithand without MgOThe iptimunt mass of zeolyte was 3 grants. The adsorption capacities oJ' inactivated zeolytes u,ithoutAnd with LttgO adcting were 0.00780994 and 0.0102% pq grdm zeolyte, respectivety. The adsorptionCapacities of activated zeoll'te by HCl, HNO: dan H:SO| wiihout Mgo addingw)re 0.00i01%,0.006610.4, and 0a0917?i, per gram:eolil'te. Lhe adsorption capacities of activated zeolyle by HCl, HNO j dan H2SO| v'i* )IgO udding were 0.00839%,0.0i01% dan 0.011% per gram zeoll'te. The activation and lulgO adr)ing increasecl the aclsorption capacitl' oJ' zeolyte to nitrogen contained in httman urine.

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

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"".

SYNTHESIS AND CARATERIZATION OF SNO2 AS A DEVELOPMENT EFFORTS WHITE TIN PRODUCTS TO IMPROVE NATIONAL DEVISES Anti Kolonial Prodjosantoso; Endang Widjajanti Laksono; M. Pranjoto Utomo
Jurnal Penelitian Saintek Vol 16, No 2: Oktober 2011
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Long-term goal of this research is to apply nanotechnology in the development of downstream products of tin to increase the national foreign exchange. As a preliminary study, SnO2 was synthesized by dissolving tin metal in concentrated HCl followed by addition of concentrated NH4OH in dropwise. The precipitate was filtered, dried, and partially characterized using IR spectrophotometer FTIR-8300/8700 model in the range of wave number of 400 cm-1 to 4000 cm-1, whilst the rest was then heated in a furnace at temperature about 900 °C for 4 hours. The oxide was then cooled and characterized by using XRD Zhimadsu S6000 diffractometer using monochromatic Cu KĮ radiation with a wavelength (Ȝ) of 1.5406 Å in the 2ș range 5o to 90o , and scanning electron microscope (SEM) JEOL T330 A operating at 15 keV. The crystallography aspects of SnO2 was studied based on the X-ray diffraction data (XRD) which was analyzed with Rietveld method using the WinPLOTR program. The SnO2 oxide was found to be tetragonal P42/mnm space group having lattice parameters of a = b = 4.7337(2) ǖ and c = 3.1841(3) ǖ. The particle size of the SnO2 oxide was found to be about 35.39 nm.

NANOPARTIKEL APPLICATION OF TIN WHITE PRODUCTS AS A MICROSENSOR ETHANOL M. Pranjoto Utomo; Endang Widjayanti LFX; Anti Kolonial Prodjosantoso; Rini Wulandari
Jurnal Penelitian Saintek Vol 18, No 1: April 2013
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Penelitian ini bertujuan untuk mengetahui karakter SnOz, kemampuan adsorpsi dan kepekaan mikrosensor timah oksida terhadap etanol. Timah oksida (SnOz) disintesis melalui metode sol-gel. Terbentuknya Sn02 dipelajari dengan cara membandingkan difraktrogram Sn02 hasil sintesis dengan difraktogram standar JCPDS. Adsorpsi etanol pada permukaan SnOz dipelajari berdasar spektra FTIR sebelum dan sesudah proses adsorpsi. Daya adsorpsi Sn02 terhadap etanol pada berbagai waktu pemaparan ditentukan dengan menggunakan metode Micro Conway Diffusion. Konduktivitas listrik Sn02 sebelum dan sesudah adsorpsi pada berbagai waktu pemaparan ditentukan berdasarkan resistansi Sn02. Hasil penelitian menunjukkan bahwa Sn02 berhasil disintesis berdasarkan kemiripan puncak pada difraktogram hasil sintesis dengan puncak pada difraktogram standar, yaitu pada 29: 26,48; 33,87; 51,72. Adsorbsi Sn02 terhadap etanol ditunjukkan dengan adanya serapan baru pada 1300-1000 em" (serapan khas gugus -CO). Daya adsorpsi per gram Sn02 pada waktu pemaparan 3, 10, dan 30 menit masing-masing adalah 0,0222 g, 0,0224 g, dan 0,0226 g. Konduktivitas listrik Sn02 sebelum proses adsorpsi adalah 2,042x10-5 S/cm. Konduktivitas SnOz sesudah proses adsorpsi terhadap etanol cair pada waktu pemaparan 3, 5, 10, 20, dan 30 menit secara berurutan adalah 94,783x10-5 , 82,935x10-5 , 66,348x10-5 , 64,730x10-5 dan 63,189x10-5 S/cm. Konduktivitas SnOz terhadap gas etanol pada waktu pemaparan 3, 5 dan 10 menit secara berurutan adalah 0,332xlO-5, 0,295x10-5 dan 0,265x10-5 S/cm.

Co-Authors A.K Prodjosantoso A.K Prodjosantoso Athoourrohman Athoourrohman Christyan, T. Ciptarini, Novita Dwi Endang Widjajanti Laksono FX Endang Widjayanti LFX Farah Noer Aina Arifin Isthifaul Mawaddah Isti Yunita Kolonial Prodjosantosa, Anti Kun Sri Budiasih Marita Dean Rachma Muhammad Shobirin Rahmawati, Vera Dwi Nur Regina Tutik Padmaningrum Rini Wulandari Rostyalina Rostyalina Syaiful Amri Tisia Miftakhul Triani Triani, Tisia Miftakhul Vera Dwi Nur Rahmawati Yunita, Isti

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