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All Journal Bioscience Jurnal Penelitian Pendidikan IPA (JPPIPA) FONDATIA Atrium Pendidikan Biologi Journal On Teacher Education (Jote)
Irdawati Irdawati
Universitas Negeri Padang
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Immunology & microbiology Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Physics Social Sciences Other

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Kombucha Tea Production Using Different Tea Raw Materials Putri Ardila Sari; Irdawati Irdawati
Bioscience Vol 3, No 2 (2019): Biology
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (342.619 KB) | DOI: 10.24036/0201932105584-0-00

Abstract

Tea (Camellia sinensis) is an agricultural product that is widely issued by people around the world. Some types of tea in the world are green tea, black tea, oolong tea and white tea. Kombucha tea is brewed water for tea and sugar then given bacteria and fungi and fermented for 7-10 days. The purpose of this study was to determine the quality of kombucha of several different types and determine the organoleptic value of fermented kombucha tea using different types. This research was conducted in April-July 2019 in the Microbiology Laboratory of the Department of Biology FMIPA Padang State University. This research is an experimental study with 5 treatments and 1 repetition (K: kombucha starter, P1: kombucha starter + green tea, P2: kombucha starter + black tea, P3: kombucha starter + oolong tea, P4: kombucha starter + white tea. Parameters Calculated are the number of microbes, nata thickness, pH of kombucha tea, total acetic acid, and organoleptic tests of kombucha tea.The results of this study indicate differences in the types of tea used in kombucha fermentation, the quality of kombucha tea produced, kombucha tea using black tea. The organoleptic test requested by the panelists was kombucha tea from white tea.
The Thermophilic Bacterial Growth Curve Irdawati Irdawati; Ilsa Septia Putri; Syamsuardi Syamsuardi; Anthoni Agustien; Yetria Rilda
Bioscience Vol 2, No 2 (2018): Biology
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (577.485 KB) | DOI: 10.24036/0201822100819-0-00

Abstract

Thermophilic bacteria are bacteria that can produce thermostable enzymes and used in various industries. Thermostable enzymes that can be produced by thermophilic microorganisms one of them is xylanase enzyme. Xylanase produced by microbes has optimum temperature characteristics and more diverse optimum pH on various substrates, which will affect the activity of the resulting xylanase enzyme. The influence of temperature greatly determines the activity of the enzyme at the time of catalyzing a reaction. At optimum pH conditions, the enzyme has an active side conformation that is substrate-like so that it can form a complex of appropriate enzymes and produce the product to its full potential. One of the thermophilic bacterial habitats of hot springs in West Sumatera is the Aro Sapan River hot spring located in Koto Parik Gadang Subdistrict in Ateh, South Solok District. The Saw Aro River hot spring has a temperature of 75 ° C and is pH 8 or alkaline. The aim to this research was to know the profile of the growth of thermophilic bacteria. This research is a descriptive method. The data obtained were analyzed descriptively. The conclusion is the best activity of xylanase thermophilic bacteria was at the sixth time incubation.
Identification of fungi in biogas mixed with buffalo dung and leaf onion waste (Allium cepa L.) Mei Niarti; Irdawati Irdawati; Moralita Chatri; Des M Des
Bioscience Vol 5, No 2 (2021): Biology
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/0202152106831-0-00

Abstract

Biogas is a gas produced from the decomposition process of organic materials by microorganisms in anaerobic conditions. Waste of red onion (Allium cepa L.) and buffalo dung contain organic substances and nutrients that can be used as biogas. The purpose of this study was to identify fungi in biogas mixed with buffalo dung with scallion waste (Allium cepa L.).The study was conducted from April to September 2019 in the Microbiology Laboratory and Integrated Research Laboratory, Department of Biology, Faculty of Mathematics and Natural Sciences, State University. This research is a descriptive study by observing macroscopic and microscopic characters as a basis for identification produced by fungi in buffalo dung biogas (Pariaman, West Sumatra) and onion leaf waste from Alahan Panjang, West Sumatra.The results of this study obtained 5 genus of fungi on biogas substrate from a mixture of buffalo dung with scallion waste (Allium cepa L.) including: Aspergillus, Trichoderma, Candida, Mucor and Humicolla. Biogas adalah gas yang dihasilkan dari proses penguraian bahan-bahan organik oleh mikroorganisme dalam keadaan anaerob. Limbah daun bawang merah (Allium cepa L.) dan kotoran kerbau mengandung zat organik dan unsur hara yang dapat dijadikan sebagai biogas. Tujuan penelitian ini untuk mengidentifikasi jamur pada biogas campuran kotoran kerbau dengan limbah daun bawang merah (Allium cepa L.). Penelitian dilaksanakan dari bulan April sampai bulan September 2019 di Laboratorium Mikrobiologi dan Laboratorium Penelitian Terpadu Jurusan Biologi Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri. Penelitian ini merupakan penelitian deskriptif dengan mengamati karakter makroskopis dan  mikroskopis  sebagai dasar identifikasi yang dihasilkan oleh jamur pada biogas kotoran kerbau (Pariaman, sumatera barat ) dan limbah daun bawang merah dari alahan panjang, sumatera barat. Hasil dari penelitian ini diperoleh 5 genus jamur  pada substrat biogas dari campuran kotoran kerbau dengan limbah daun bawang merah (Allium cepa L.) diantaranya yaitu: Aspergillus, Trichoderma, Candida, Mucor dan Humicolla.
Enumertion of Enterobacteriaceae in Ice-Based School Children Food in Koto Tangah District, Padang West Sumatera Bob Refianto; Irdawati Irdawati
Bioscience Vol 4, No 1 (2020): Biology
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (256.861 KB) | DOI: 10.24036/0202041105358-0-00

Abstract

Elementary students have high playing activities while in school. Hot weather and feeling tired after playing, will cause thirst and to get rid of thirst Elementary school students will buy ice-based snacks. They do not realize, the danger of unhygienic snacks will cause diarrheal diseases, because ice cubes are made by home industries still traditionally without considering hygiene requirements. In some countries, the food industry has moved towards testing Enterobacteriaceae which shows enteric bacterial contamination as a condition hygiene. This study aimed to determine the microbiological hygiene quality of the Enterobacteriaceae numbers in ice-based school children snacks in Koto Tangah Subdistrict, Padang City. This study was a descriptive study. The study was conducted from April to May 2019 at the Laboratory of Microbiology at the Center for Drug and Food Control in Padang. Total samples taken were 20 samples. The results showed that the sample that fulfilled the microbiological quality requirements for sadness was 60% (12 samples) and 40% (8 samples) that did not meet the requirements, the highest results were obtained at SDN 44 Sungai Lareh with a value of 9.82 x 105 colonies/mL.
NEED ANALYSIS OF INSTRUCTIONAL MEDIA WITH ESQ NUANCE AS SUPLEMENT IN SENIOR HIGH SCHOOL Khalif Alfajri; Ardi Ardi; Ganda Hijrah Selaras; Irdawati Irdawati; Heffi Alberida; Sasmeri Sasmeri
ATRIUM PENDIDIKAN BIOLOGI Vol 6, No 3 (2021): Atrium Pendidikan Biologi
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/apb.v6i3.11621

Abstract

The 2013 curriculum encourages students to be more active and independent when getting information about learning materials. Therefore, teachers are required to be able to increase students' learning motivation, one of which is by developing learning media that can attract students' learning interest. The purpose of this study was to see the needs of students for learning media with ESQ nuances about bacteria as a supplement to biology teaching materials for class X science SMAN 2 Payakumbuh. This type of research is descriptive quantitative research. The method used to collect data was done through distributing questionnaires to class XII students and interviewing two teachers, namely a biology teacher and an Islamic religious education teacher. In addition, the daily test results obtained by students were also used as data in this study. The results of the study revealed that students had difficulty in understanding biology learning about bacterial material due to the difficulty of observing micro learning objects plus less supportive learning media where the images on the learning media were of very low quality and colorless. This results in a lack of student motivation in participating in the learning process. For that we need a learning media that is easy to understand and has high quality images so that it can be studied independently by students.
Antibacterial Activities of Kombucha Tea From Some Types of Variations of Tea on Escherichia coli and Staphylococcus aureus Witri Nofita Safitri; Irdawati Irdawati
Bioscience Vol 4, No 2 (2020): Biology
Publisher : UNIVERSITAS NEGERI PADANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/0202042105679-0-00

Abstract

 Tea can be used as a fermented drink called kombucha tea. Based on the oxidation process tea is classified into white tea, green tea, oolong tea and black tea. The compounds produced from the fermentation of kombucha tea have a fairly good antibacterial effect. This study aims to determine the antibacterial activity of kombucha tea fermentation from several variations of tea types against Escherichia coli and Staphylococcus aureus. This research is an experimental study with a completely randomized design (CRD) with 5 treatments and 3 replications conducted in May-June 2019 at the Microbiology Laboratory and the Integrated Research Laboratory of the Department of Biology FMIPA UNP. Kombucha tea used in this study was white tea, green tea, oolong tea and black tea. Antibacterial activity test was carried out by paper disc diffusion method against microbial test of S. aureus and E. coli bacteria. Research results showed that the highest antibacterial activity of kombucha tea fermentation in E.coli was found in black tea with a value of 1.64 cm and the lowest in tea white with a value of 1.04 cm. In S. aureus the highest value was obtained in black tea with a value of 2.48 cm and the lowest in white tea with a value of 1.39 cm.
Analisis Kebutuhan Booklet Terintegrasi Nilai-nilai Islam sebagai Suplemen Bahan Ajar pada Materi Virus Kelas X SMA/MA Putri Sarinami; Zulyusri Zulyusri; Irdawati Irdawati; Ardi Ardi
Journal on Teacher Education Vol. 4 No. 2 (2022): Journal on Teacher Education
Publisher : Universitas Pahlawan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jote.v4i2.7557

Abstract

Penelitian ini bertujuan untuk mengidentifikasi dan memetakan kebutuhan peserta didik terhadap booklet pada materi virus. Metode yang digunakan adalah metode deskriptif dengan pendekatan kuantitatif dan kualitatif. Sampel pada penelitian ini yaitu satu orang guru biologi yang mengajar di kelas X dan 27 peserta didik dari kelas X IPA1 yang dipilih berdasarkan rata-rata nilai ulangan yang terendah pada materi virus. Hasil penelitian ini yaitu guru belum pernah menggunakan booklet pada materi virus, peserta didik kesulitan dalam memahami materi virus, dan bahan ajar yang digunakan belum terintegrasi nilai-nilai islam. Kesimpulan dari penelitian ini adalah booklet terintegrasi nilai-nilai islam pada materi virus dibutuhkan sebagai suplemen atau tambahan bahan ajar yang sudah ada sebelumnya, untuk mendukung dan memaksimalkan proses pembelajaran.
Pengembangan Lembar Kegiatan Peserta Didik (LKPD) Berbasis Problem Solving pada Materi Virus untuk Kelas X SMA/MA Desi Nurmayenti; Heffi Alberida; Fitri Arsih; Irdawati Irdawati
FONDATIA Vol 7 No 1 (2023): MARET
Publisher : Pendidikan Guru Madrasah Ibtidaiyah STIT Palapa Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36088/fondatia.v7i1.2883

Abstract

LKPD (Student Activity Sheet) in student-centered learning serves as a guide for learning activities. Based on the results of observations and interviews with teachers at SMA AL-Istiqamah it is known that the LKPD in this school has not been adapted to the learning model used, therefore it needs to be developed. The purpose of this study was to develop problem solving based worksheets on viruses for class X SMA/MA. This type of research is development research using the 4-D model. The subjects of this study were 39 students of class X MIPA 1 SMA AL-Istiqamah. The product that is produced is a problem solving based LKPD on virus material. The validators consisted of two lecturers from the Department of Biology FMIPA UNP and one Al-Istiqamah High School Biology teacher. The research data is in the form of validation data and practicality of LKPD. Data analysis is in the form of descriptive statistics. The results showed that problem solving-based worksheets on virus material fulfilled the valid category with a validity value of 89.26% and practical with 88.45% practicality. It could be concluded that problem solving-based Student Activity Sheets were produced on virus material for class X SMA. Valid and practical /MA.
The Effect of the Two Stay Two Stray Learning Model Based on a Scientific Approach to Student Competence in Biology Learning Rizka Putri Alti; Moralita Chatri; Irdawati Irdawati; Vauzia Vauzia
Jurnal Penelitian Pendidikan IPA Vol. 9 No. 2 (2023): February
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i2.2933

Abstract

This study aims to determine the effect of the two stay two stray learning model based on a scientific approach to the competence of class XI students at SMAN 3 Pariaman. This type of research is a quasi-experimental research with a randomized control-group posttest only design. The research population was all class XI MIPA students at SMAN 3 Pariaman in the 2022/2023 academic year. Sampling used a purposive sampling technique, so that class XI MIPA 1 (experimental class) and class XI MIPA 3 (control class) were selected. Data analysis techniques using normality test, homogeneity test and hypothesis testing. Testing the hypothesis in the domain of knowledge uses the t test while testing the hypothesis in the domain of attitudes and skills using the Mann Whitney test. The results of the study found that the two stay two stray learning model based on a scientific approach had an effect on the competence in the realm of knowledge, attitudes and skills of class XI students at SMAN 3 Pariaman
Co-Authors Anthoni Agustien Ardi Ardi Bob Refianto Des M Des Desi Nurmayenti Fitri Arsih Ganda Hijrah Selaras Heffi Alberida Ilsa Septia Putri Khalif Alfajri Mei Niarti Moralita Chatri Moralita Chatri Putri Ardila Sari Putri Sarinami Rizka Putri Alti Sasmeri Sasmeri Syamsuardi Syamsuardi Vauzia Vauzia Witri Nofita Safitri Yetria Rilda Zulyusri Zulyusri