Sebelas Maret University

About: Sebelas Maret University is a education organization based out in Surakarta, Indonesia. It is known for research contribution in the topics: Population & Public health. The organization has 10901 authors who have published 10832 publications receiving 33057 citations. The organization is also known as: Universitas Negeri Surakarta & Universitas Sebelas Maret.

Pengaruh Perlakuan Pendahuluan Terhadap Karakteristik Mutu Minyak Atsiri Daun Jeruk Purut (Citrus hystrix DC)

Abstract: Penelitian ini bertujuan untuk mengetahui pengaruh variasi perlakuan pendahuluan (daun segar utuh, daun pemeraman, daun kering angin giling kasar (15 mesh), dan daun kering angin giling halus (60 mesh)) terhadap karakteristik mutu minyak atsiri daun jeruk purut yang meliputi rendemen, berat jenis, putaran optik, indeks bias, viskositas, dan kelarutan dalam alkohol 70% serta kandungan dan kadar senyawa aktif minyak atsiri daun jeruk purut terpilih. Hasil penelitian yang diperoleh menunjukkan bahwa minyak atsiri daun jeruk purut dengan perlakuan pemeraman memiliki rendemen tertinggi sebesar 0,867%. Berat jenis, viskositas, indeks bias, putaran optik, dan kelarutan alkohol 70% berturut-turut sebesar 0,837-0,845 g/ml, 0,016-0,023 N.m/s 2 , 1,450-1,453 dan 1:3-1:4. Senyawa aktif minyak atsiri daun jeruk purut ( Citrus hystrix DC) terpilih yaitu Citronellal 64,15%, Beta-Citronelol 10,71%, Linalool 5,54%, dan Trans-Caryophyllene 5,31% yang didapat dari hasil destilasi daun jeruk purut dengan perlakuan pendahuluan pemeraman.

Genetic variations among Indonesian native cattle breeds based on polymorphisms analysis in the growth hormone loci and mitochondrial DNA

Abstract: Sutarno (2010). Genetic variations among Indonesian native cattle breeds based on polymorphisms analysis in the growth hormone loci and mitochondrial DNA. Biodiversitas 11: 1-5. Genetic variation within breeds is important and its study has become a subject of interest in livestock species, as it has many applications in animal breeding and genetics, such as the identification of animals and parentage testing, gene mapping and identifying markers for performance traits. Two loci of bovine growth hormone genes, and two regions of mitochondrial DNA, D-loop and ND-5 were characterized using polymerase chain reaction – restriction fragment length polymorphism (CR-RFLP) involving 120 Indonesian native cattle of Bali, Madura, PO and West Sumatra breeds. The results indicated that sequence variations were detected both in the growth hormone loci and mitochondrial DNA.

The Equivalence of Translated Songs Lyrics and their Effects - The Case of Translated Ecclesial Songs

Abstract: This study aimed at describing the equivalence of eclessial song lyrics, which belong to the content word, the meaning of the sentences and their effect on church songs. The method used in this study is descriptive and qualitative by using music, language, and interdiciline approach. The data collection method used questionnaires technique, interview, documents and content analysis. The data used are 5 documents of songs chosen purposively as the primary data. Based on the data being analyzed, the results of this study were: 1) The translated content word located in the same bars and equivalent was around 27.07%, the translated content word located in the same bars, but not equivalent was 18.34%, the translated content word located in the different bars, but equivalent was 11.79%, the translated content word located in the different bars and not equivalent was 2.62%, and the untranslated words were 4.17%. 2) The translation of equivalence beautiful lyrics showed the beauty of the song was equivalent at 17.02%, the beauty of the song was less equivalent at 29.78%, the beauty of the song was not equivalent of 61.70%. 3). The differences of structure caused the incorrect dictions or choice of words and missing words in the translated lyrics.

Tensile analysis and assessment of carbon and alloy steels using FE approach as an idealization of material fractures under collision and grounding

Abstract: Abstract In this study, a numerical investigation tensile test using ANSYS on three different carbon and alloy sheets of steel: AISI 1030 medium carbon steel, AISI 1080 high carbon steel and high-strength low-alloy (HSLA) A606 steel, has been carried out. The influences of three different specimen geometries on the stress–strain curve were also investigated. Understanding the properties of these materials, such as stress–strain obtained from a tensile test, is important. Materials are subjected to forces or loads when in use, for example, steel in a ship’s hull experiences significant stresses and strains. In such situations, it is necessary to understand the characteristics of the material because grounding or collisions can occur, which deform the materials. The differences in stress and strain obtained from three specimens with different geometries and mesh sizes of 2.5, 5, 7.5, and 10 mm for all proposed steels, were observed. The results showed that the ultimate tensile strength was always lower in specimen 2 compared to the other specimens. Furthermore, the highest von Mises stress and strain contour was located in the midsection of specimens 1 and 3 in all of the proposed materials.

Carotenoid pigment as sensitizers for applications of dye-sensitized solar cell (DSSC)

Abstract: A dye-sensitized solar cell is the third generation of solar cells that can convert solar energy into electrical energy using photo-electrochemical principles. Natural dye extracted from carotenoid pigments such as orange fruits, carrots, and tomatoes. The absorbance of dye and TiO2 were characterized using UV-Vis spectrophotometer. The chemical bond contained TiO2/dye were characterized using FTIR spectrophotometer. The efficiency of DSSC was calculated using I-V meter Keithley. The absorbance spectra results show that carotenoid dyes have peaked in the wavelength range of 400 nm-510 nm. The highest efficiency was obtained from tomatoes dye at 0.03% due to the interaction between TiO2 and carboxyl –OH group. Adsorption of carotenoid dyes on the surface of TiO2 can be used as the photosensitizer for DSSC.