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All Journal E-Journal Home Economic and Tourism CHEMPUBLISH JOURNAL e-Jurnal Inovasi Pembelajaran Sekolah Dasar e-Jurnal Inovasi Pembelajaran Sekolah Dasar
Nani Lestari
Program Studi Pendidikan Fisika FKIP Untan, Pontianak
Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Economics, Econometrics & Finance Education Languange, Linguistic, Communication & Media Library & Information Science Mathematics Social Sciences Other

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SUBSTITUSI TEPUNG TALAS TERHADAP KUALITAS COOKIES Lestari, Nani; Syarif, Wirnelis; Holinesti, Rahmi
Journal of Home Economics and Tourism Vol 8, No 1 (2015): Periode Maret 2015
Publisher : Faculty of Tourism and Hospitality - Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (641.065 KB)

Abstract

One of an effort to reduce dependence on wheat flour in making cookies were utilizing one of the local products that can be processed is the tuber of taro as a potential source of carbohydrates which is quite high. The purpose of this study was to analyze the effect of substitution of taro flour as much as 15%, 30% and 45% of the flour used to form quality (uniform shape and the shape of the flower), brownish yellow color, smells(the fragrance and taro smells), taste (taroand sweet taste), and texture (brittleand porous texture) on cookies. The research is a pure experiment completely randomized design method using three repetitions and 30 samples. The results showed that F count > F table so that substitution of the quality of taro flour cookies effect on the quality of the form (uniform shape and form of flowers), brownish yellow color, smells (the fragrance andtaro smells), taste (sweetness and taro taste), and texture (crumbly and porous texture).Keywords: influence, substitution of taro flour, cookies quality
Pembelajaran IPS dengan Menggunakan Model Cooperative Learning Tipe Numbered Heads Together di Sekolah Dasar Lestari, Nani; Farida S, Farida S; Eliyasni, Rifda
e-Jurnal Inovasi Pembelajaran Sekolah Dasar Vol 2, No 2 (2014): (Agustus-Desember) e-JIPSD
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/e-jipsd.v6i1.2777

Abstract

The research aimed at improving students’ science learning outcomes by using Numbered Heads Together Model at the four grade. The research was conducted at SDN 09 Bandar Buat. The subjects of the research were teachers and 24 four grade students. The research findings showed that there was such improvement on: a) the planning that was 7,2%, b) the implementation, teachers and students’ aspect; that was 13,8%, and c) the students’ learning outcomes; that was 7,08Keywords: IPS, Numbered Heads Together
Pembelajaran IPS dengan Menggunakan Model Cooperative Learning Tipe Numbered Heads Together di Sekolah Dasar Lestari, Nani; Farida S, Farida S; Eliyasni, Rifda
e-Jurnal Inovasi Pembelajaran Sekolah Dasar Vol 2, No 2 (2014): (Agustus-Desember) e-JIPSD
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/e-jipsd.v6i1.2777

Abstract

The research aimed at improving students’ science learning outcomes by using Numbered Heads Together Model at the four grade. The research was conducted at SDN 09 Bandar Buat. The subjects of the research were teachers and 24 four grade students. The research findings showed that there was such improvement on: a) the planning that was 7,2%, b) the implementation, teachers and students’ aspect; that was 13,8%, and c) the students’ learning outcomes; that was 7,08Keywords: IPS, Numbered Heads Together
Green Synthesis of Ag/Chitosan Nanoparticles using Avocado Leaves Bioreductor (Persea americana Mill.) as a Nitrite Colorimetry Detector Lestari, Nani; Puspitasari, Ratih Dyah Puspitasari; Susanto, Nindita Clourisa Amaris; Tarigan, Indra Lasmana; Nelson, Nelson
Chempublish Journal Vol. 9 No. 2 (2025): Chempublish Journal (July - December)
Publisher : Department of Chemistry, Faculty of Science and Technology Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/chp.v9i2.46583

Abstract

Urinary tract infection (UTI) is one of the most common types of infection caused by the growth of microorganisms in the human urinary tract. Nitrite can be detected using spectroscopy, electrochemistry, chemiluminescence, chromatography, capillary electrophoresis, and flow injection analysis methods. However, this method takes quite a long time. So, this method is not suitable for rapid screening because it requires time for bacterial incubation and adequate sample preparation. So, there is a need for a fast-screening method that can diagnose UTIs through a nitrite colorimetric sensor. The colorimetric method is based on nanoparticles, which are relatively cheap and can provide visual and rapid detection. Nitrite is an indicator in diagnosing UTI. This research aims to determine the synthesis of Ag nanoparticles using avocado leaf bio-reductors (Persea americana Mill.) and chitosan as a stabilizer, which can be used as a colorimetric nitrite detector to minimize the use of dangerous and environmentally unfriendly inorganic materials. Characterization and analysis in this research used a UV-Vis spectrophotometer, FT-IR (Fourier Transform Infra-Red), and PSA (Particle Size Analyzer). The Ag nanoparticle synthesis process was carried out by varying the bioreductant volume, synthesis time, and chitosan concentration. It was found that the optimum synthesis time was 4 hours with an SPR value of 428 nm, an absorbance of 2.112 and a nanoparticle size. Apart from that, the optimum concentration of chitosan was obtained at a concentration of 2.5% with an SPR of 435 nm and an absorbance of 1.341 with a nanoparticle size. The results obtained from AgNPs/chitosan as a colorimetric nitrite detector showed a color change to purple with an LOD value of 0.1303 µM and an LOQ of 0.4345 µM. Keywords: Ag Nanoparticles; Avocado Leaveas; Colorimetry; Nitrite.
Co-Authors Eliyasni, Rifda Farida S, Farida S Indra Lasmana Tarigan Nelson Nelson Puspitasari, Ratih Dyah Puspitasari Rahmi Holinesti Susanto, Nindita Clourisa Amaris Wirnelis Syarif