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Destri Ratna Ma'rifah
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Biology Education Department Faculty of Teacher and Training Education Universitas Ahmad Dahlan Jl. Ahmad Yani, Ringroad Selatan, Tamanan, Banguntapan, Bantul, Daerah Istimewa Yogyakarta
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Journal on Biology and Instruction (JouBIns)
Published by Universitas Ahmad Dahlan
ISSN : -     EISSN : 27980863     DOI : https://10.26555/joubins
Core Subject : Science, Education, Agriculture, Social,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Education Environmental Science Immunology & microbiology
This journal presents articles on research results or studies related to the fields of biology education and biology science. The article in this journal contains a discussion on the use of biology as a means of education and living things as biological objects. The scope contained in this journal includes: development of biology teaching materials, development of learning technology in biology learning, exploration of the potential of nature as a source of learning biology, germplasm wealth, environmental biology, biotechnology.
Arjuna Subject : Umum - Umum
Articles 2 Documents
 1 
Search results for , issue "Vol. 3 No. 1 (2023)" : 2 Documents clear
Determination of Protein Content of Processed Dairy Products Using the Kjeldahl Method Aska, Silma Aska; Nurillah, Alif Salma; Benani, Kabira; Azizah, Nabila Wahyu
Journal on Biology and Instruction Vol. 3 No. 1 (2023)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26555/joubins.v3i1.7055

Abstract

Each food processing process will affect the nutritional value of the ingredients, especially the protein content. This study uses the Kjeldahl method to see the effect of processed dairy products dairy products on protein value. The method used in this study is quantitative by practicing the Kjeldahl method and studying literature to understand its results and make comparisons with the results of this study. There are three stages of the Kjeldahl method analysis: the process of destruction, distillation, and titration carried out by the Kjeldahl machine. The conversion factor used is also specific to dairy products, namely 5.85. This Kjeldahl test uses selenium as a catalyst. The principle of this method is to oxidize nitrogen-containing compounds, which are converted to ammonia and react with concentratedacids to form ammonium salts. The results showed that the protein content in whole milk, powdered milk, yoghurt, and cheese were 14.74%, 11.81% 12.32%, and 5.27%, respectively. It is proven that the longer the processing time, especially at uncontrolled temperatures, the protein content tends to decrease.
Content Digital Literation of Biology Textbooks SMA/MA Class XII in Genetic Materials Concept Yosriah, Ely; Chandra, Edy; Mulyani, Asep; Maryuningsih, Yuyun; Ubaidillah, Mujib
Journal on Biology and Instruction Vol. 3 No. 1 (2023)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26555/joubins.v3i1.7060

Abstract

Textbooks can be considered in determining the level of learning opportunities for students. The learning process to support 21st-century skills requires literacy skills, one of which is digital literacy. The purpose of this study was to determine the comparison of digital literacy content in the aspects of elements, skills, levels, and models in Biology textbooks for class XII SMA/MA on the concept of genetic material. The research method used in this research is qualitative content analysis. Overall, the textbooks analyzed so far have not been compiled digitally because they are still very low. Digital literacy must be optimum by being facilitated by appropriate books. Modifying the form of a book with accommodation for higher digital literacy, even though it is a printed book so that it can collaborate with digital media. Therefore, teachers should first analyze the quality of the contents of Biology textbooks with more complex digital literacy content from various publishers, to see a comparison of the quality of each book used in learning.

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