Articles
<![CDATA[Antibacterial Activity of Extract A. luteocarpa ]]>
<![CDATA[Tita Juwitaningsih]]>;
<![CDATA[Destria Roza]]>;
<![CDATA[Nora Susanti]]>
<![CDATA[ Indonesian Journal of Chemical Science and Technology (IJCST) Vol 1, No 1 (2018): Juli 2018 ]]>
Publisher : <![CDATA[Universitas Negeri Medan ]]>
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DOI: 10.24114/ijcst.v1i1.10182
<![CDATA[Meat is one of the food products that can easily be damaged, ( therefore it is necessary to preserve the process). therefore it needs to be done the process of preservation. In this study we studied the anti-bacterial activity of Alpinia luteocarpa extract against fresh meat rot bacteria, with paper disc diffusion method which is the standard recommended by the Clinical and Laboratory Standard Institute (CLSI,2012). The results of antibacterial activity test showed extract and fraction of A. luteocarpa able to inhibit bacterial growth B.cereus ATCC 21772 and. K. pneumonia ATTC 13773. The bacteriostatic properties of the extract and fraction of A. luteocarpa against B. cereus ATCC 21772 and K. pneumonia ATTC 13773 were better than the positive control of chlorhexidine antibiotics (500 μg / mL) with inhibition zones 9-11 mm and 7-9 mm.]]>
<![CDATA[Pengaruh Model Pembelajaran Kooperatif Team Games Tournament (TGT) Berbantuan Media Teka–Teki Silang (TTS) Terhadap Hasil Belajar Dan Motivasi Siswa Pada Materi Tata Nama Senyawa Di Kelas X SMA Swasta Parulian 1 Medan ]]>
<![CDATA[Agus Martinus Waruwu]]>;
<![CDATA[Nora Susanti]]>
<![CDATA[ Jurnal Inovasi Pembelajaran Kimia (Journal Of Innovation in Chemistry Education) Vol 1, No 2 (2019): OKTOBER 2019 ]]>
Publisher : <![CDATA[Universitas Negeri Medan ]]>
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DOI: 10.24114/jipk.v1i2.15517
<![CDATA[This study aims to determine student learning outcomes with the cooperative learning model TGT assisted by crossword puzzles on compound nomenclature material. Learning outcomes data collection tool used objective tests totaling 20 questions that have been tested for validity, difficulty level, different power, and reliability with an r value of 0.92. The results of data analysis showed an increase in student learning outcomes in the experimental class by 81.66% higher when compared to the control class by 75%. The average value of learning outcomes in the experimental class was 81.66 ± 9.17, while the average value of student learning outcomes in the control class was 75 ± 8.88. The results of the one-tailed t test were obtained tcount> t table (3.29> 1.67) so that Ha was accepted. This means that the learning outcomes of students in the experimental class are higher than those of the control class. The sum of students' motivation in the experimental class is initial motivation of 86.8, while final motivation is 96. This shows that the Team Games Tournament (TGT) cooperative learning model assisted by crossword media can improve learning outcomes and student motivation, and make a positive contribution to learning outcomes.]]>
<![CDATA[Analisis Butir Soal Ujian Semester Ganjil Kimia Kelas X SMA Negeri 1 Perbaungan ]]>
<![CDATA[Ria Atika Purba]]>;
<![CDATA[Nora Susanti]]>;
<![CDATA[Rosna Rosna]]>
<![CDATA[ Jurnal Inovasi Pembelajaran Kimia (Journal Of Innovation in Chemistry Education) Vol 1, No 1 (2019): APRIL 2019 ]]>
Publisher : <![CDATA[Universitas Negeri Medan ]]>
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DOI: 10.24114/jipk.v1i1.12536
<![CDATA[The purpose of this study is to find out the quality of the odd chemistry semester exam questions of class X IPA 1 Perbaungan 2017/2018 school year based on qualitative analysis (material, construction, and language), analysis of cognitive level distribution, and quantitative analysis (validity, reliability, power difference, level of difficulty, and effectiveness of deception) using the ANATES V4 program. This study uses a type of quantitative research with descriptive methods. The results of this study are that the content validity in the material is in a very high category, in the construction aspect in the low category and the language aspect in the category is very high. Results based on cognitive domain level distribution are not in accordance with domain level proportions. The results of the study are based on quantitative analysis which is based on validity is 55% valid, and 45% is invalid. Based on reliability is 0.76. Based on the difference in power is good and based on effectiveness the deception is effective.]]>
<![CDATA[Pengembangan Website Berbasis Masalah Sebagai Media Pembelajaran untuk Mendukung Pembelajaran Online Pada Materi Laju Reaksi ]]>
<![CDATA[Crisye Efendi Tambunan]]>;
<![CDATA[Noven Zakarias Simanjuntak]]>;
<![CDATA[Nora Susanti]]>
<![CDATA[ Jurnal Inovasi Pembelajaran Kimia (Journal Of Innovation in Chemistry Education) Vol 3, No 1 (2021): APRIL 2021 ]]>
Publisher : <![CDATA[Universitas Negeri Medan ]]>
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DOI: 10.24114/jipk.v3i1.22845
<![CDATA[This study aims to determine the feasibility aspect of a problem learning-based website as a learning medium to support online learning on the reaction rate material developed based on BSNP standards. This research consists of three stages, namely the stage of needs analysis based on interviews, observation through goole forms, analysis of learning media and literature study. The development stage begins with compiling a media design, developing, assessing the feasibility of website graphics with the BSNP instrument by one Computer Science lecturer who gets an average score of 3.77 which means very feasible, and assessing the reaction rate material integrated into the website by 3 people Physical Chemistry lecturers and 1 Chemistry teacher get an average content feasibility score of 3.44 which means very feasible, language feasibility of 3.63 means very feasible, and presentation feasibility of 3.66 means very feasible.]]>
<![CDATA[Pengembangan Lembar Kerja Siswa (LKS) Berbasis Pendekatan Saintifik Pada Pokok Bahasan Laju Reaksi ]]>
<![CDATA[Widya Syahdi]]>;
<![CDATA[Lisnawaty Simatupang]]>;
<![CDATA[Nora Susanti]]>
<![CDATA[ Jurnal Inovasi Pembelajaran Kimia (Journal Of Innovation in Chemistry Education) Vol 3, No 2 (2021): OKTOBER 2021 ]]>
Publisher : <![CDATA[Universitas Negeri Medan ]]>
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DOI: 10.24114/jipk.v3i2.28179
<![CDATA[Penelitian ini bertujuan untuk mendapatkan LKS pendekatan saintifik yang utamanya membahas tentang reaksi yang memenuhi kriteria, ketepatan bahasa, penempatan, dan sesuai menurut BSNP, menentukan respons LKS berbasis pendekatan saintifik terhadap laju reaksi dan untuk mengetahui hasil. siswa yang menggunakan LKS di SMA lebih tinggi dari KKM. Jenis penelitian yang digunakan adalah Research and Development (R&D). Populasi dalam penelitian ini adalah seluruh siswa kelas XI SMA Swata Prayatna Medan tahun ajaran 2020/2021. Sampel ditentukan secara purposive sampling dengan mengambil 1 kelas sebagai kelas eksperimen.Hasil penelitian menunjukkan: 1) LKS berbasis pendekatan saintifik pada pokok bahasan reaksi yang dikembangkan memenuhi kriteria BSNP, dengan pengolahan data yang diperoleh: sesuai = 3,70, menurut bahasa = 3,56, sesuai = 3,67, dan sesuai grafik = 3 ,75 dengan Kriteria valid dan tidak perlu direvisi; 2) Hasil angket respon siswa terhadap LKS berdasarkan pendekatan saintifik pada materi laju reaksi diperoleh rata-rata 90,41%. 3) Hasil belajar siswa yang menggunakan LKS berbasis pendekatan saintifik pada pokok bahasan Laju reaksi lebih tinggi daripada KKM.]]>
<![CDATA[Suspension Stability Ethanol Extract Of Frankincense Gum (Styrax Benzoin) ]]>
<![CDATA[Nora Susanti]]>;
<![CDATA[Yosia Gopas Oetama Manik]]>;
<![CDATA[Jamalum Purba]]>
<![CDATA[ JBIO: jurnal biosains (the journal of biosciences) Vol 8, No 2 (2022): JBIO: jurnal biosains (the journal of biosciences) ]]>
Publisher : <![CDATA[Universitas Negeri Medan ]]>
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DOI: 10.24114/jbio.v8i2.33622
<![CDATA[Sap is a very important commodity in the industrial pharmacy, perfumes and medicines contain abundant active compounds of frankincense making resin widely used. Extraction and solvation processes play an important role in the production of stable frankincense extract. One of the widely used preparations is suspension, which is an active compound that does not dissolve in water to become soluble. The purpose of this study was to determine the manufacture of a suspension of frankincense gum extract as an active pharmaceutical ingredient. The method used was precipitation using cosolvent, surfactant and agitation process at 1500 rpm at a temperature of 40oC. Various comparisons were analyzed for phytochemical screening, viscosity and pH. in the most stable formula to be tested, the size of the suspension particles found that frankincense extract was soluble in distilled water with an average particle size is 4.80205 μm. .]]>
<![CDATA[Hubungan Kemampuan Matematika dan Kemampuan Awal dengan Hasil Belajar Kimia Siswa SMA Kelas XI pada Pokok Bahasan Larutan Penyangga ]]>
<![CDATA[Pasar Maulim Silitonga]]>;
<![CDATA[Freddy Tua Musa Panggabean]]>;
<![CDATA[Nora Susanti]]>;
<![CDATA[Marudut Sinaga]]>;
<![CDATA[Lesrida Situmorang]]>
<![CDATA[ Jurnal Inovasi Pembelajaran Kimia (Journal Of Innovation in Chemistry Education) Vol 4, No 2 (2022): OKTOBER 2022 ]]>
Publisher : <![CDATA[Universitas Negeri Medan ]]>
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DOI: 10.24114/jipk.v4i2.39261
<![CDATA[Chemistry is one of the most difficult subjects for most students. There are many factors that influence the success of students in learning chemistry, including mathematical abilities and students' initial abilities. This study aims to determine the relationship between mathematical ability and initial ability with students' chemistry learning outcomes. The sample of this study consisted of one class, namely class XI IPA 2 students who were taken by random sampling technique. Data analysis used simple regression test with variance test (variance fingerprint) and multiple regression, as well as correlation test and coefficient of determination at a significance level of 5%. The results showed that (1) there was a significant relationship between mathematical ability and student chemistry learning outcomes, with a contribution of 16%; (2) There is a significant relationship between initial ability and student chemistry learning outcomes, with a contribution of 33.64%; (3) There is a significant relationship between mathematical ability and initial ability simultaneously with student chemistry learning outcomes with a coefficient of determination of 51.27%.Ilmu kimia merupakan salah satu pelajaran tersulit bagi kebanyakan siswa. Ada banyak factor yang mempengaruhi keberhasilan siswa dalam belajar kimia, diantaranya kemampuan matematika dan kemampuan awal siswa. Studi ini bertujuan untuk mengetahui hubungan kemampuan matematika dan kemampuan awal dengan hasil belajar kimia siswa. Sampel penelitian ini terdiri dari satu kelas yaitu siswa kelas XI IPA 2 yang diambil dengan teknik random sampling. Analisis data menggunakan uji regresi sederhana dengan uji varians (sidik ragam) dan regresi ganda, serta uji korelasi dan koefisien determinasi pada taraf signifikasi 5%. Hasil penelitian menunjukkan bahwa (1) Ada hubungan yang signifikan antara kemampuan matematika dengan hasil belajar kimia siswa, dengan kontribusi sebesar 16%; (2) Ada hubungan yang signifikan antara kemampuan awal dengan hasil belajar kimia siswa, dengan kontribusi sebesar 33,64%; (3) Ada hubungan yang signifikan antara kemampuan matematika dan kemampuan awal secara simultan dengan hasil belajar kimia siswa dengan koefisien determinasi sebesar 51,27%.]]>
<![CDATA[Hubungan Motivasi Belajar dan Kepercayaan Diri dengan Kemampuan Literasi Kimia serta Dampaknya Terhadap HOTS Mahasiswa ]]>
<![CDATA[Jamalum Purba]]>;
<![CDATA[Ani Sutiani]]>;
<![CDATA[Freddy Tua Musa Panggabean]]>;
<![CDATA[Pasar Maulim Silitonga]]>;
<![CDATA[Nora Susanti]]>
<![CDATA[ Jurnal Inovasi Pembelajaran Kimia (Journal Of Innovation in Chemistry Education) Vol 4, No 2 (2022): OKTOBER 2022 ]]>
Publisher : <![CDATA[Universitas Negeri Medan ]]>
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DOI: 10.24114/jipk.v4i2.39459
<![CDATA[Science education has an important role in preparing quality human resources in the face of globalization. The potential of science education can be seen from the ability to communicate, critical thinking, problem solving, mastery of technology and the ability to adapt to changes and times. The process and learning of science can produce quality human beings by demonstrating scientific awareness (scientific literacy) and higher order thinking skills. This study aims to determine the relationship between learning motivation and self-confidence with chemical literacy skills and their impact on HOTS abilities. The sample of this research is 30 students of chemistry education study program. The instrument used is a learning motivation and self-confidence questionnaire as well as a chemical literacy ability test and the HOTS test that have met the valid and relatable criteria. Data analysis using path analysis test. The results showed that learning motivation and self-confidence had a significant positive relationship and influence on HOTS abilities, either directly or indirectly through chemical literacy skills. Chemical literacy ability has a significant positive relationship and effect on HOTS ability. Chemical literacy ability is a positive intervening factor between learning motivation and self-confidence on HOTS abilities.Pendidikan sains memiliki peran penting dalam mempersiapkan sumber daya manusia yang berkualitas dalam menghadapi era globalisasi. Potensi pendidikan sains dapat dilihat dari kemampuan berkomunikasi, berpikir kritis, pemecahan masalah, penguasaan teknologi dan kemampuan beradaptasi dengan perubahan dan zaman. Proses dan pembelajaran sains dapat menghasilkan manusia yang berkualitas dengan menunjukkan kesadaran sains (literasi sains) dan keterampilan berpikir tingkat tinggi. Studi ini bertujuan untuk mengetahui hubungan antara motivasi belajar dan kepercayaan diri dengan kemampuan literasi kimia serta dampaknya terhadap kemampuan HOTS. Sampel penelitian ini adalah mahasiswa prodi pendidikan kimia sebanyak 30 orang. Instrumen yang digunakan adalah angket motivasi belajar dan kepercayaan diir serta tes kemampuan literasi kimia dan tes HOTS yang telah memenuhi kriteria valid dan relabel. Analisis data menggunakan uji analisis jalur. Hasil penelitian menunjukkan bahwa motivasi belajar dan kepercayaan diri memiliki hubunagn dan pengaruh positif signifikan terhadap kemampuan HOTS baik secara langsung maupun tidak langsung melalui kemampuan literasi kimia. Kemampuan literasi kimia memiliki hubungan dan berpengaruh positif signifikan terhadap kemampuan HOTS. Kemampuan literasi kimia merupakan faktor intervening positif antara motivasi belajar maupun kepercayaan diri terhadap kemampuan HOTS.]]>
<![CDATA[Hubungan Self-Efficacy dan Kemampuan Berpikir Kreatif dengan Hasil Belajar Kimia Siswa SMA ]]>
<![CDATA[Nora Susanti]]>;
<![CDATA[Lisnawaty Simatupang]]>;
<![CDATA[Ratu Evina Dibyantini]]>;
<![CDATA[Ricky Andi Syahputra]]>;
<![CDATA[Elfrida Ginting]]>
<![CDATA[ Jurnal Inovasi Pembelajaran Kimia (Journal Of Innovation in Chemistry Education) Vol 4, No 2 (2022): OKTOBER 2022 ]]>
Publisher : <![CDATA[Universitas Negeri Medan ]]>
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DOI: 10.24114/jipk.v4i2.39486
<![CDATA[The quality of an education always refers to the results or academic achievements achieved by students. Chemistry can be a place or means for students to practice critical thinking skills, be creative and be able to solve problems where students relate them to everyday phenomena. Certainly, there are many factors that influence the success of students in learning chemistry. This study aims to determine the relationship between self-efficacy and creative thinking skills with student chemistry learning outcomes. The sample of this study was 50 students of class XI taken by random sampling technique. Data were collected using a self-efficacy questionnaire as well as creative thinking ability tests and chemistry learning outcomes tests. Data analysis using multiple linear regression test. The results showed that there was a positive and significant relationship between self-efficacy and student chemistry learning outcomes, there was a positive and significant relationship between creative thinking skills and student chemistry learning outcomes; there is a significant and simultaneous relationship between self-efficacy and creative thinking skills with student chemistry learning outcomes with a coefficient of determination of 36.2%.Kualitas suatu pendidikan selalu mengacu pada hasil atau prestasi akademik yang dicapai oleh peserta didik. Ilmu kimia dapat menjadi wadah atau sarana bagi siswa untuk melatih kemampuan berpikit kritis, kreatif dan mampu memecahkan masalah dimana siswa mengaitkannya dengan fenomena sehari-hari. Tentunya ada banyak faktor yang mempengaruhi keberhasilan siswa dalam belajar kimia. Penelitian ini bertujuan untuk mengetahui hubungan self-efficacy dan kemampuan berpikir kreatif dengan hasil belajar kimia siswa. Sampel penelitian ini adalah siswa kelas XI sebanyak 50 orang yang diambil dengan teknik random sampling. Data dikumpulkan menggunakan angket self-efficacy serta tes kemampuan berpikir kreatif dan tes hasil belajar kimia. Analisis data menggunakan uji regresi linier berganda. Hasil penelitian menunjukkan bahwa terdapat hubungan yang positif dan signifikan antara self-efficacy dengan hasil belajar kimia siswa, terdapat hubungan yang positif dan signifikan antara kemampuan berpikir kreatif dengan hasil belajar kimia siswa; terdapat hubungan yang signifikan dan simultan antara self-efficacy dan kemampuan berpikir kreatif dengan hasil belajar kimia siswa dengan koefisien determinasi sebesar 36,2%.]]>
<![CDATA[Formulation and antibacterial activity of frankincense sap extract deodorant spray (Styrax benzoin) ]]>
<![CDATA[Nora Susanti]]>;
<![CDATA[Jamalum Purba]]>;
<![CDATA[M Nizam]]>;
<![CDATA[Cindy Agnesia]]>;
<![CDATA[Astri Devi Br Pakpahan]]>
<![CDATA[ Jurnal Pendidikan Kimia (JPKIM) Vol 15, No 3 (2023): December ]]>
Publisher : <![CDATA[Pascasarjana Universitas Negeri Medan ]]>
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DOI: 10.24114/jpkim.v15i3.49009
<![CDATA[Deodorant is a cosmetic preparation used by the wider community to control and reduce body odor. Deodorant act as antibacterial and are able to reduce the excretion of sweat in the armpits. Frankincense is a plant that contains flavonoids and tannins can act as antibacterial. This aim of this study was to determine the effectiveness of frankincense sap extract as an antibacterial in deodorant spray preparation. Frankincense sap powder is macerated with ethanol to obtain frankincense sap extract. Deodorant formulations are prepared from frankincense sap extract in various concentrations (5%, 10%, 15%, 20%, 25%) and combined with cosolvent, emollient, and solvent. Tests carried out include antibacterial testing against Pseuodomonas aureugenisa and Staphylococcus epidermidis bacteria, organoleptic test, pH test, viscosity test, and irritation test. The test results showed that antibacterial testing gave the highest inhibitory diameter of 2.63 mm and 5.35 mm which was exhibited by formulation 5.Keywords: Bacteria; Body odor; Deodorant spray; Styrax benzoin]]>
