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Nurhamidah
Universitas Bengkulu
Humanities Chemistry Education Health Professions Immunology & microbiology Languange, Linguistic, Communication & Media Mathematics Medicine & Pharmacology Nursing Public Health Social Sciences Other

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ANALISIS HUBUNGAN PELAKSANAAN PRATIKUM TERHADAP HASIL BELAJAR KIMIA SISWA SMA NEGERI DI KOTA BENGKULU Tanti Anggraini; Nurhamidah Nurhamidah; Salastri Rohiat
ALOTROP Vol 6, No 1 (2022)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v6i1.20320

Abstract

Penelitian ini merupakan penelitian deskriptif korelasional yang bertujuan untuk menganalisis hubungan antara pelaksanaan pratikum terhadap hasil belajar kimia siswa SMA negeri di Kota Bengkulu. Penelitian ini dilakukan pada bulan Februari sampai Juni tahun 2020 di SMA negeri Kota Bengkulu yang terdiri dari 10 sekolah dengan sampel penelitian guru kimia yang mengajar di kelas XI MIPA yaitu sebanyak 15 orang. Dalam penelitian ini digunakan dua instrument penelitian yaitu instrument angket pelaksanaan pratikum dan dokumentasi hasil belajar. Instrumen angket pelaksanaan pratikum divalidasi oleh dua orang ahli yaitu dosen pendidikan kimia dan salah satu guru SMA negeri di kota Bengkulu pada 26 februari sampai 3 maret tahun 2020, hasil validasi menyatakan 29 item pertanyaan valid yaitu 24 item pertanyaan tertutup dan 5 item pertanyaan terbuka. Hasil belajar yang digunakan dalam penelitian ini adalah nilai ulangan harian pokok bahasan termokimia dan laju reaksi pada semester ganjil tahun ajaran 2019/2020. Uji korelasi antara pelaksanaan pratikum terhadap hasil belajar kimia menggunakan uji korelasi sederhana pearson product moment. Hasil penelitian menunjukkan bahwa pelaksanaan pratikum kimia yang dilaksanakan untuk kelas XI di SMAN sekota Bengkulu tahun ajaran 2019/2020 semester ganjil diperoleh sebesar 93% dengan kategori sangat baik. Hasil analisis nilai siswa untuk pokok bahasan termokimia diperoleh sebesar 34,09% siswa berkategori sangat baik, 61,09% baik dan 4,82% cukup. Nilai pokok bahasan laju reaksi diperoleh sebanyak 39,06% siswa berkategori sangat baik, 52,79% baik, 6,79% cukup dan 1,36% kurang. Hasil uji korelasi menunjukkan bahwa adanya hubungan yang positif dan signifikan antara pelaksanaan pratikum kimia di kelas XI pada SMAN sekota Bengkulu pada tahun ajaran 2019/2020 terhadap hasil belajar siswa dengan hasil yang diperoleh nilai koefisien korelasi 0,933 (kategori sangat kuat pada materi termokimia) dan 0,860 (kategori sangat kuat pada materi laju reaksi) serta nilai sig. (2-tailed) sebesar 0,007 untuk materi termokimia dan 0,028 untuk materi laju reaksi. 
SINTESIS DAN KARAKTERISASI NANOPARTIKEL KEBIUL (Caesalpinia bonduc L ) TERSALUT LIPID PADAT TRIMIRISTIN Chyntia Margareta; Agus Sundaryono; Nurhamidah Nurhamidah
ALOTROP Vol 5, No 2 (2021)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v5i2.17137

Abstract

PENERAPAN MODEL PEMBELAJARAN KOOPERATIF TIPE COURSE REVIEW HORAY(CRH) UNTUK MENINGKATKAN MOTIVASI DAN HASIL BELAJAR KIMIA SISWA SMA N 1 KOTA BENGKULU 1Nurul Zulhulaifah; Nurhamidah Nurhamidah; Elvinawati Elvinawati
ALOTROP Vol 2, No 2 (2018)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v2i2.7484

Abstract

This study is a classroom action research applying the Course Review Horay learning model on the subject of basic chemical laws and chemical reaction equations in three cycles with four stages: planning, implementation, observation and reflection on each cycle aimed at improving motivation, activity and results learning chemistry of students of class X IPA 5 SMA N 1 Kota Bengkulu academic year 2017/2018. The study was conducted in March-April of 2018 with a total of 27 students, consisting of 17 women and 10 men. The data were obtained using questionnaire of motivation, posttest and observation sheet of teacher and student activity, which was processed using simple quantitative analysis technique, mean score of motivation questionnaire and observation sheet, percentage of classical absorption and classical learning completeness. From the results of this study it can be concluded that the application of CRH learning model proved able to increase the students' motivation, activity and chemistry learning achievement to reach the minimum mastery criteria of ?75 in the third cycle. Student learning motivation increased every cycle from pre cycle up to cycle III 35,69% (low), 38,95% (low), 59,71% (medium) and 78,96% (high) respectively. The activities of teachers and students also increased each cycle in a row: teacher activity scores: 36, 38 and 38.5 with good category and student activity score: 29 (enough), 37,5 and 38 with good category. Student learning outcomes in cycle I obtained an average value of 54.3; 54.3% classical absorption and 16% classical learning completeness. In cycle II, the average score is 72.5; 72.5% classical absorption and 57.69% classical learning completeness. In cycle III, the average score is 78.76; 78.76% classical absorption and 84.61% classical learning completeness
UJI AKTIVITAS ANTIBAKTERI DAUN JERUK KALAMANSI (Citrofortunella microcarpa) TERHADAP BAKTERI Staphylococcus aureus DAN Escherichia coli Deza Oktasila; Nurhamidah Nurhamidah; Dewi Handayani
ALOTROP Vol 3, No 2 (2019)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v3i2.10122

Abstract

This study aims to examine the antibacterial activity of ethanol extract and essential oil of Kalamansi citrus leaves (Citrofortunella microcarpa) against Staphylococcus aureus and Escherichia coli bacteria. The raw material of Kalamansi citrus leaves is obtained from the Village of Pondok Kubang, Bengkulu Tengah (3.70060S, 102.35780E). Ethanol extract from Kalamansi citrus leaves was obtained by maceration using ethanol 96%, then ethanol extract was made dilution concentration 40 ; 20; , 10; and 5%. The essential oil of Kalamansi citrus leaves is obtained by water-vapor distillation, then made variations of concentration 20;, 15;, 10;  and 5%. The method used to test the antibacterial activity is the paper disc diffusion method , the antibacterial activity is shown by the diameter of the inhibiting  zone formed. The data of antibacterial test result were analyzed by using One Way Anova test which showed the effect of treatment on the growth of test bacteria seen from the value (P <0,01) and continued by Duncan test to know the effect of the treatment. The results showed that ethanol extract of Kalamansi citrus leaves had antibacterial activity against S. aureus and E. coli bacteria with moderate inhibitory diameter is  7.20 and 5.73 mm at concentration 40%, while antibacterial activity on essential oil of Kalamansi citrus leaves is categorized as strong with inhibition zone diameter is 14.83 and 13.00 mm at concentration 20%.
PROFIL FITOKIMIA DAN UJI SITOTOKSIK EKSTRAK ETANOL TUMBUHAN Zanthoxylum acanthopodium DC (ANDALIMAN) MENGGUNAKAN METODE BSLT Liis Panggabean; Nurhamidah Nurhamidah; Dewi Handayani
ALOTROP Vol 4, No 1 (2020)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v4i1.13711

Abstract

The purpose of this study was to determine the phytochemical profile of Zanthoxylum acanthopodium DC plant (Andaliman) and to know the extract part of plant ethanol Z acanthopodium DC as the best anticancer agent. Root basal samples, stem bark, leaves and fruit Z acanthopodium DC as much as 3 Kg, then dried up and smoothed. Fine samples of root, bark, leaves and fruit of Z acanthopodium DC were each weighed 450 gr and each sample was extracted using 5 L ethanol solvent. Root extract, bark, leaves and fruit Z anthoxylum acanthopodium DC obtained from extraction weighed as much as 1 g, then each of them in concentrations of 10, 100, and 1000 ppm. Cytotoxic tested using BSLT method with shrimp larvae of 10 tail, then determined LC50 by using relationship between probit and log of concentration. Each sample of fine roots, bark, leaves and fruit Z acanthropodium DC were weighed 3 grams. Then press the phytochemical profile. Phytochemical profile test results of each sample of acanthopodium DC Z showed the presence of alkaloids, flavonoids, tannins, terpenoids and saponins. The largest alkaloid content is found on the skin of stems and roots (++) with Papaya leaf comparison, the largest flavonoid content of bark (++) skin with peach flower compound, tannin leaf and tanug (+++) seedlings with Avocado seed comparator, and the largest Kandugan saponin on bark (+++) with the comparative Starfruit Wuluh. In the cytotoxic test results, each leaf extract of stem, leaves, roots and Z acanthopodium DC fruit has potential as an anticancer agent because the liberating LC50 in each sample is in the range 30-1000 ppm. The extract part of the stem bark has the greatest potential as an anticancer compared to fruits, leaves and roots. Because bark leaf extract has LC50 so that 57,677 ppm compared to root of 65,313 ppm, leaves of 77, 983 ppm, and fruit of 191,426 ppm. Usually root samples, stem bark, leaves and fruit Z acanthopodium DC can be used as an anticancer because of the content of flavonoids, saponins, alkaloids, tannins, and terpenoids.
PEMANFAATAN EKSTRAK AIR BUAH Flacourtia inermis Roxb. (LOBI-LOBI) SEBAGAI PENGAWET IKAN LAUT Ade Pribadi; Nurhamidah Nurhamidah; Elvinawati Elvinawati
ALOTROP Vol 2, No 1 (2018)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v2i1.4581

Abstract

[THE  UTILIZATION OF   Flacourtia inermis Roxb. (LOB-LOBI ) FRUIT WATER EXTRACTS AS A MARINE FISH PRESERVATIVE] This research aims to determine the magnitude of the concentration and the length of time the optimum soaking water extracts of fruit Flacourtia inermis Roxb. (lobi-lobi ) as well as measuring its potential for use as a preservative in marine fish. Sample marine fish used is Kerapu Macan (Epinephelus fuscogultatus). The concentration of water extract from the fruit of F.inermis Roxb  is at levels at 10, 20, 30 and 40% with soaking time each at 1, 2 and 3 hours for any variation of the concentration. Observation of the level of the fish freshness is done with a variety of storage time of 12, 18, and 24 hours at room temperature to any variation of the concentration of extract and soaking time. The parameters used in determining the level of the freshness of the sample fish is a rate of Total Volatile Bases (TVB), moisture content, and pH. The results of the research done indicate that extracts water from the fruit of F.inermis Roxb L are potential for use as a preservative of marine fish based on the values of pH and the levels of TVB. The most optimum concentration and soaking time in Kerapu Macan fish preserve during its storage was soaking with a concentration of 30% for 1 hour, i.e., able to withstand the pace of the decline of the quality of the Kerapu Macan sample for 18 hours at room temperature: with the pH 6.7 and fish TVBvalue at 29.4 mgN/100 g.
PERBANDINGAN HASIL BELAJAR KIMIA SISWA MENGGUNAKAN KARTU TRUTH AND DARE DENGAN PEMBELAJARAN KONVENSIONAL Tiara Nitaria Sinaga; Nurhamidah Nurhamidah; Dewi Handayani
ALOTROP Vol 6, No 1 (2022)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/alo.v6i1.21800

Abstract

This study aims to find out how the student's chemistry learning outcomes on the periodic properties of elements in two grade X Mathematics and Natural Sciences at SMA Negeri 02 Mukomuko with the media card game Truth and Dare. The type of research used is a quasi-experimental study with a population of class X MIPA at SMAN 2 Mukomuko and the sample is class X MIPA 2 and class X MIPA 3. The sample in this study is class X Mathematics and Natural Sciences 3 as a control with conventional learning and class X Mathematics 2 as a control. experiment using truth and dare media. Analysis of the data used is the average value of posttest, normality test, homogeneity test, and t test. Data on student learning outcomes were obtained from the pretest and posttest scores with an average of 39.36 and 47.74 for the control class while the experimental class was 26.67 and 68. Then a t-test was carried out with a significant level (? = 0.05), then the value of t-count is 3.290 and t-table is 1.7084. The results showed that there were significant differences in learning outcomes between classes that used Truth and Dare card media and classes that did not use Truth and Dare card media.
ANALISIS SOAL PADA BUKU TEKS KIMIA SMA KELAS XI BERDASARKAN RANAH KOGNITIF TAKSONOMI BLOOM Diana Andari; Salastri Rohiat; Nurhamidah Nurhamidah
ALOTROP Vol 5, No 2 (2021)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v5i2.17139

Abstract

PERBANDINGAN SENSITIVITAS NANOPARTIKEL PERAK DENGAN REDUKTOR ALBUMIN DARI TELUR AYAM DAN BEBEK UNTUK ANALISIS MERKURI Fikri Fadillah Azhar; Elvinawati Elvinawati; Nurhamidah Nurhamidah
ALOTROP Vol 3, No 2 (2019)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v3i2.10508

Abstract

The aims of this study were determine the protein level of chicken egg albumin (Gallus Sp.) And duck egg albumin (Anas domestica) also optimum conditions, sensitivity, and LOD values of silver nanoparticles (NPP) synthesized using bioreductors of chicken (Gallus Sp.) egg albumin and duck (Anas domestica) egg albumin for analysis of mercury ions (II). This research was conducted at the Laboratory of Chemistry FKIP UNIB on April - July 2019. Protein levels of chicken egg albumin and duck egg albumin were obtained in the amount of 0.210 gr / 100 ml and 0.234 gr / 100ml, respectively. The NPP synthesized in this study was carried out by mixing silver precursors derived from 10 mM AgNO3 solution and 1% albumin solution as bioreductors of each chicken egg albumin solution and duck egg albumin. The optimum condition of NPP synthesized using chicken egg albumin bioreductor and duck egg albumin was the same, with the number of comparisons between AgNO3 and albumin solutions namely 1: 2 and stirring time of 30 minutes. The results showed that NPP synthesized using chicken egg albumin and egg albumin ducks had good sensitivity to Hg metal with the addition of Hg metal concentrations above 50 ppm that be marked with significant color changes from brownish yellow to clear. LOD values in each NPP synthesized using bioreductors of chicken egg albumin and duck egg albumin were 3334 ppm and 2,238 ppm, so that NPP synthesized using bioreductor of duck egg albumin was more sensitive than NPP synthesized using bioreductor of chicken egg albumin for mercury metal analysis. This is influenced by the differences of protein levels of chicken egg albumin and duck egg albumin where the protein level of duck egg was higher than the protein level of chicken egg.
ANALISIS MISKONSEPSI SISWA MENGGUNAKAN TES DIAGNOSTIK ESAI BERBANTUAN CRI (CERTAINTY OF RESPONSE INDEX) PADA POKOK BAHASAN ASAM BASA Raudha Isminiarti Izza; Nurhamidah Nurhamidah; Elvinawati Elvinawati
ALOTROP Vol 5, No 1 (2021)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v5i1.16487

Abstract

Co-Authors 1Nurul Zulhulaifah Abdi Dharma ACENG RUYANI Ade Pribadi Agus Sundaryono Amiliah Amiliah Apria Haja Krisma Budiyanto Budiyanto Chyntia Margareta Citra Utari Dewi Handayani Deza Oktasila Diah Sari Nastiti Diana Andari Ekwan Sukardi elvinawati Elvinawati Elvinawati Elvinawati Elvinawati Elvinawati Elvinawati Elvinawati Elvinawati Elvinawati Elvinawati Elvinawati Elvinawati Emilia Candrawati Febrian Solikhin Febrian Solikhin Febrian Solikhin Fikri Fadillah Azhar Genesis Tria Haulia Dwi Putri Hazli Nurdin Heriwati Heriwati Hermansyah Amir I Nyoman Candra I Nyoman Chandra Indah Monica Isna Mutaqwiyati Liis Panggabean M. Lutfi Firdaus Mantiko Parbo Maulana Marti Hitsmi Muzanip Alperi Nadia Amida Okti Mindi Safitri Oma Sepriani Raudha Isminiarti Izza Rendy Wirakrama Resmareta Rika Indriyani Rima Fadillah Rina Anjelina Rina Elvia Rina Elvia Rina Elvia Salastri Rohiat Salastri Rohiat Salastri Rohiat Salastri Rohiat Shinta Puspasari Sumpono Sumpono Tanti Anggraini Tiara Nitaria Sinaga Wiwit Wiwit Alwi Wulan Agustina Yunazar Manjang Zeta Kuntari