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PENGEMBANGAN PERANGKAT PEMBELAJARAN BERBASIS PENDEKATAN SAINTIFIK MODEL GUIDED DISCOVERY DAN EFEKTIVITASNYA TERHADAP PENGUASAAN KONSEP BIOLOGI SISWA SMA NEGERI 1 BAYAN Sumiadi, Raden; Jekti, Dwi Soelistya Dyah; -, Jamaluddin
Jurnal Penelitian Pendidikan IPA Vol 2, No 2 (2016): July
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v2i2.43

Abstract

The purposes of this research are 1) developing learning device based on scientific approach with model of guided discovery 2) knowing elegibility peripheral of study base on scientific approach model of guided discovery 3) Knowing effectiveness peripheral of study to ability domination biological concept. Development peripheral of study use model 4D from Tiagrajan S. Semmel & modified Semmel become three phase, that is phase of define, design, and development. Result of development peripheral study is hereinafter analysed to use formula of presentase adapted for mean the tables criterion result of validasi. To know effectiveness peripheral of study to domination biological concept, peripheral of study in aplicate limited group in SMAN 1 Bayan and analysed to use formula of presentase complete individual. Result of research show, peripheral of study base on scientific approach model of guided discovery categorized good (valid) and very good (very valid) competent so that used in course study of biology in SMAN 1 Bayan, and peripheral study can streamline ability of domination biological concept student.Keyword: Learning device, Scientific approach, Guided discovery,   Mastery of biological concept
EFEKTIFITAS PEMBELAJARAN BERBASIS MASALAH (PBM) DAN STRATEGI KOOPERATIF TERHADAP KEMAMPUAN MENYELESAIKAN MASALAH DAN HASIL BELAJAR KOGNITIF BIOLOGI DITINJAU DARI KEMAMPUAN AKADEMIK AWAL SISWA KELAS X SMA NEGERI 3 MATARAM Gayatri, I Gst Ayu Suartini; Jekti, Dwi Soelistya Dyah; Jufri, A. Wahab
Jurnal PIJAR Vol 8, No 2 (2013)
Publisher : Jurnal PIJAR

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Saat ini sekolah belum menerapkan suasana belajar yang mengembangkan kemampuan siswa, terutama dalam kemampuan menyelesaikan masalah dan hasil belajar kognitif siswa. Sehingga tingkatan kemampuan berpikir siswa hanya berada pada tataran berpikir tingkat rendah yang tidak memiliki penalaran dan kemampuan menyelesaikan  masalah yang nyata. Pendekatan pembelajaran berbasis masalah dan strategi pembelajaran kooperatif menjadi alternatif pendekatan pembelajaran yang dapat meningktakan hasil belajar siswa. Penelitian ini bertujuan untuk mengetahui adanya pengaruh penerapan pembelajaran (PBM terintegrasi STAD, PBM dan STAD), kemampuan akademik siswa dan interaksi antara strategi pembelajaran dengan tingkat kemampuan akademik siswa terhadap kemampuan menyelesaikan masalah dan hasil belajar kognitif biologi siswa kelas X SMAN 3 Mataram. Penelitian ini merupakan penelitian quasi experiment  dengan Pretest-Posttes Nonequivalent Control Group Design, perlakuan dengan seting faktorial 2 x 3. Populasi penelitian sebanyak 480 siswa yang tersebar dalam 12 kelas. Teknik sampling dipilih dengan cluster random sampling dan diperoleh 120 siswa yang tersebar dalam 3 kelas. Hasil uji statistik menunjukkan  adanya pengaruh yang signifikan (p<0,05) pada penerapan strategi pembelajaran (PBM terintegrasi STAD, PBM dan STAD) terhadap kemampuan menyelesaikan masalah  dan hasil belajar kognitif siswa.  Tingkat kemampuan akademik siswa (tinggi dan rendah) juga menunjukkan pengaruh yang signifikan (p<0,05) terhadap kemampuan menyelesaikan masalah  dan hasil belajar kognitif siswa. Namun interaksi antara srategi pembelajaran dengan kemampuan akademik siswa tidak berpengaruh terhadap kemampuan menyelesaikan masalah  dan hasil belajar kognitif siswa (p>0,05).
BAKTERI ENDOFIT KULIT BATANG TERAP (ARTOCARPUS ELASTICUS) DAN AKTIFITASNYA SEBAGAI ANTIBAKTERI -, Guplin; Jekti, Dwi Soelistya Dyah; Zulkifli, Lalu
Jurnal Penelitian Pendidikan IPA Vol 3, No 2 (2017): July
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v3i2.106

Abstract

This study aims to identify the types of endophytic bacteria on the bark of terap (Artocarpus elasticus) capable of inhibiting the growth of clinical isolate bacteria of Staphylococcus aureus, Escherichia coli, Salmonella typhi, and Pseudomonas aeruginosa. Stages of this study were (1) isolating the endophytic bacteria from the bark of terap plants (2) antibacterial test (inhibition test) against clinical isolate bacteria, (3) biochemical test upon endophytic isolate bacteria showing strong  inhibition effect, (4) moleculer identifcation upon endophytic bacteria isolate showing strong  inhibition effect. From this study, it was obtained 34 barks of terap isolates, and 12 isolates have inhibitory effect on S. aureus. Based on 16S rRNA   molecular identification, the isolate of endophytic bacteria of the barks were identified as Bacillus cereus, Bacillus subtilis and Bacillus amyloliquefaciens. Those  endophytic bacteria of Terap plants  are potentially  to be  developed as a the producer of antibacterial compounds.Keywords: Terap bark, Endophytic bacteria, Identification, Antibacteria
PENGARUH EKSTRAK ETANOL DAUN JAMBU AIR (SYZYGIUM AQUEUM) TERHADAP BAKTERI ISOLAT KLINIS Hariyati, Titi; Jekti, Dwi Soelistya Dyah; Andayani, Yayuk
Jurnal Penelitian Pendidikan IPA Vol 1, No 2 (2015): July
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v1i2.16

Abstract

Syzygium aqueum plant of the family Myrtaceae is native of Malaysia and Indonesia and is known as the water rose. The active compound is useful as an antibacterial. This study aimed to determine the effects of ethanol extracts of guava leaves (S. aqueum) as an antimicrobial against clinical isolates bacteria in vitro. The design used in experiment was a Completely Randomized Design (CRD). Data were analyzed using the Kruskal-Wallis test. Results of statistical analysis using SPSS 20 for windows indicated that the ethanol extract of guava leaves has a significant (P<0,05) effect in inhibiting the growth of clinical isolates bacteria. MIC (Minimum Inhibition Concentration) of ethanol extracts for each bacterium can not be determined because the guava leaf extract was very dark. The MBC (Minimum Bacterisidal Concentration) of ethanol extract of guava leaf  for both S. aureus and S. dysenteriae was 20%.  The MBC of the extract for E. coli, S. thypi, V. cholerae was 25%, where as for B. cereus was at concentration of 50%. It can be concluded that guava leaf has highly potential as a source of antimicrobial agent.Keywords:Antibacteria, Guava Leaf, Clinical Isolates Bacteria, Ethanol Extract
PERTUMBUHAN KALUS DAUN MELON (Cucumis melo) VARIETAS MAI 119 DENGAN PEMBERIAN BAP (BENZYL AMINO PURINE) DAN 2,4-D (2,4 DICHLOROPHENOXYACETIC ACID) Toharah, Nining Intan; Jekti, Dwi Soelistya Dyah; Zulkifli, Lalu
Jurnal Penelitian Pendidikan IPA Vol 1, No 2 (2015): July
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v1i2.17

Abstract

This study aims to determine the concentration of growth regulators BAP and   2,4-D which have the highest effect in stimulating the formation of callus melon plants (Cucumis melo) Mai 119 variety. Completely randomized design (CRD) was used in this research. Media used on callus induction was MS medium with addition of several concentration of BAP  (0 mg/L, 1 mg/L, 2 mg/L, 3 mg/L) and 2,4-D (0 mg/L, 1 mg/L, 2 mg/L, 3 mg/L) either alone or in a combination of both. Parameters measured were the time appearing of callus, callus diameter, callus texture, and callus color. Anova followed by Tukey's test was used to the analyse of time appearing of callus. Data of callus diameter was analyzed using Kruskal Wallis test followed by Mann-Whitney test. In the analysis of parameter related to the callus texture and callus color, descriptive test were used. The results showed that there were differences in the effect of growth regulators on the callus formation. The fastest callus induction and the largest diameter of callus were obtained on media with concentration of 2 mg/L BAP and 3 mg/L BAP.Keywords: BAP (benzyl amino purine), 2,4-D (2,4-dichlorophenoxyacetic acid), callus induction, melon (Cucumis melo) varieties Mai 119
PENGARUH PENAMBAHAN ZAT PENGATUR TUMBUH BAP (BENZYL AMINO PURINE) DAN 2,4-D (2,4-DICHLOROPHENOXYACETICACID) TERHADAP PEMBENTUKAN PLANLET MELON (Cucumismelo) VARIETAS MAI119 Toharah, Nining Intan; Jekti, Dwi Soelistya Dyah; Zulkifli, Lalu
Bioscientist : Jurnal Ilmiah Biologi Vol 3, No 1
Publisher : Program Studi Pendidikan Biologi FPMIPA IKIP Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (234.06 KB)

Abstract

This study aims to determine the concentration of growth regulators BAP and 2,4-D which have the highest effect in stimulating the formation of shoots and roots melon plants (Cucumis melo) Mai 119 variety. The callus leaves of seedlings were used as a source explant. Completely randomized design (CRD) was used in this research. Media used on shoot induction was MS medium added with several concentration of BAP (0 mg/L, 1 mg/L, 2 mg/L, 3 mg/L) and 2,4-D (0 mg/L, 1 mg/L, 2 mg/L, 3 mg/L) either alone or in a combination of both. Media used in the formation of roots were MS medium added with 2,4-D at a several concentration of 0 mg/L, 1 mg/L, 2 mg/L, and 3 mg/L. Parameters measured were the time appearing of shoots, number of shoots, time appearing of roots, and the number of roots. Parameters measured were the time appearing of shoots and number of shoots using descriptive test. Anova followed by Tukey's test was used in the analyse time appearing of roots. In the parameter number of roots using Kruskal Wallis test followed by Mann-Whitney test. The results showed that there were differences in the effect of growth regulators on the shoots and roots formation. The fastest shoot induction was obtained in the media 3 mg/L BAP+1 mg/L 2,4-D with the highest number of shoots contained in the medium at a concentration of 3 mg/L BAP + 1 mg/L 2,4-D and 2 mg/L BAP+1 mg/L 2,4-D. The fastest root induction was obtained in media 0 mg/L 2,4-D, 1 mg/L 2,4-D, and 2 mg/L 2,4-D. The highest number of roots were obtained in media with 0 mg/L 2,4-D and 1 mg/L 2,4-D.
UJI AKTIVITAS ANTIBAKTERI EKSTRAK KENCUR (Kaempferia galanga L.) TERHADAP PERTUMBUHAN BAKTERI Staphylococcus aureus dan Streptococcus viridans Haerazi, Akhmad; Jekti, Dwi Soelistya Dyah; Andayani, Yayuk
Bioscientist : Jurnal Ilmiah Biologi Vol 2, No 1
Publisher : Program Studi Pendidikan Biologi FPMIPA IKIP Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (115.76 KB)

Abstract

Research on the Activity of Antibacterial Extract of Kencur (Kaempferia galanga L.) on Growth of Staphylococcus aureus and Streptococcus viridans In Vitro has been done. The aim of this research was to know the antibacterial activity of Kencur extract (Kaempferia galanga L.) on the growth of Staphylococcus aureus and Streptococcus viridans bacteria and to know MIC and MBC values were done by dilution method on MHB media. The main ingredients used in this study were dried kencur rhizome extracted by using ethanol solvent. The kencur extract from the extraction result was then tested for antibacterial activity on Staphylococcus aureus and Streptococcus viridans with the concentrations used were 30%, 40%, 50%, 60% and 70%. The results showed that kempur extract (Kaempferia galanga L.) at 70% concentration had antimicrobial activity against Staphylococcus aureus of 15 mm and Streptococcus viridans of 16 mm. MIC tests on the growth of Staphylococcus aureus and Streptococcus viridans bacteria were at concentrations of 38% and MBC on growth of Staphylococcus aureus and Streptococcus viridans bacteria was at concentrations of 40%.
ISOLASI, KARAKTERISASI DAN IDENTIFIKASI BAKTERI ENDOFIT KULIT BATANG SRIKAYA (ANNONA SQUAMOSA) DAN POTENSINYA SEBAGAI ANTIBAKTERI Zulkifli, Lalu; Jekti, Dwi Soelistya Dyah; Bahri, Samsul
Jurnal Penelitian Pendidikan IPA Vol 4, No 1 (2018): January
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v4i1.98

Abstract

The objective of this study was to isolate endophytic bacteria from bark of srikaya, analyzing antibacterial activity of endophytic bacteria in S. aureus, B. cereus and E. coli pathogenic bacteria, characterizing endophytic bacteria capable of inhibiting the growth of pathogenic bacteria and identification of endophytic bacteria able to inhibit the growth of pathogenic bacteria. Isolation of endophytic bacteria using TSA and NA media, bioassay on pathogen bacteria with concentration of 106 cells / ml with using Ø 6 mm wells and entering supernatant of 100 μl. Supernatant was obtained by growing endophytic bacteria in NB media shaken with shaker 150 cycles / min for 48 h at 32ᵒC then culture centrifuge at 5000 g for 30 min. Positive control using cyprofloxacin. Characterization is based on the nature of the colony, Gram paint, spore formation, and biochemical tests. The results of the study yielded 13 endophytic bacterial isolates and 4 endophytic isolates capable of inhibiting the growth of 8 pathogenic bacteria with sensitive criteria, 2 pathogenic bacteria with resistant criteria and 1 pathogen bacteria can not be inhibited its growth. Gram's paint results show that 4 endophytic isolates belong to Gram-positive, rod-shaped and spore forming cells. From the character possessed by the bacteria can be identified that the 4 bacteria endofit capable of inhibiting pathogenic bacteria are Bacillus brevis, Bacillus latesporus, Virgibacillus pantothenticus, and Bacillus circulansKeywords: Characterization, Endophytic Bacteria, Bark of Srikaya, Antibacterial
UJI AKTIVITAS ANTIBAKTERI EKSTRAK KULIT BUAH JERUK NIPIS (Citrus aurantifolia Swingle) TERHADAP PERTUMBUHAN BAKTERI ISOLAT KLINIS Wardani, Rohmi; Jekti, Dwi Soelistya Dyah; Sedijani, Prapti
Jurnal Penelitian Pendidikan IPA Vol 5, No 1 (2019): January
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v5i1.101

Abstract

The objective of this research was to test antibacterial activity ethanol and ethyl acetate of lime peel (Citrus aurantifolia Swingle) extract by Minimal Inhibitory Concentration (MIC) and Minimal Bactericidal Concentration (MBC) against the growth of clinical isolate bacteria. The type of this study used laboratory experimental using sensitivity test, dilution of tube and spreading plate. The experimental design used Complete Random Design using three repetitions on three concentrations i.g 25, 50, and 75%. Data was analyzed by qualitative with measuring inhibit diameter zone bacterial and qualitative using Two Way Anova followed by BNT with α= 5%. The statistical analysis showed that the solvent factor and concentration factor was significantly against growing bacterial and there was an interaction affect of both factors on S. aureus growth. The result presented that the ethanol and ethyl acetate of lime peel extract strongly inhibited Staphylococcus aureus, Staphylococcus epidermidis, and Pseudomonas aeruginosa; and midly inhibited the growth of Klebsiella pneumoniae. The MIC ethanol and ethyl acetate of lime peel extract against S. aureus, S. epidermidis and P. aeruginosa was 25% and K. pneumoniae was 50%. The MBC showed that ethanol and ethyl acetate of lime peel  extract killed bacteria P. aeruginosa at 15%, S. aureus, S. epidermidis at 20% and K. pneumoniae at 25%. Taken together, it can be concluded that ethyl acetate of lime extract more effective than that of ethanol extract was to inhibit and killed clinical isolate bacterial.Keywords: lime peel (Citrus aurantifolia Swingle), antibacterial activity, clinical isolate bacteria, MIC and MBC.
Perangkat Pembelajaran IPA Model 5E : Kajian Kritis Hasil Workshop Guru-Guru Anggota MGMP IPA Kota Mataram Jekti, Dwi Soelistya Dyah; Bachtiar, Imam; Sedijani, Prapti; Zulkifli, Lalu; Setiadi, Dadi
Jurnal Pengabdian Magister Pendidikan IPA Vol 1, No 1 (2018): Desember
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpmpi.v1i1.205

Abstract

Abstrak: Kurikulum Mata Pelajaran IPA SMP tahun 2017 di Kota Mataram  menuntut para guru IPA untuk bisa meningkatkan keterampilan dalam mengembangkan perencanaan  dan mengimplementasikannya secara baik. Salah satunya adalah guru IPA SMP bisa mengembangkan perangkat pembelajaran. Untuk dapat mengembangkan perangkat pembelajaran IPA sesuai dengan standar,  para guru IPA harus memiliki keterampilan dalam mengembangkan perangkat pembelajaran, Para guru masih terpaku dengan meodel yang disarankan kemnetrian terkait, sementara  banyak model pembelajaran berbasisi siswa aktif salah satunya model 5E (Engage, Explore, Explain, Extend dan Evaluate).  Oleh karena itu perlu dilakukan kegiatan untuk mengmbangkan keterampilan  bapak/ibu guru IPA anggota MGMP IPA dalam perangkat pembelajaran model 5E. Desain yang digunakan adalah post tes no control group design. Populasi adalah semua guru IPA anggota MGMP Kota Mataram, sampel yang digunakan sebanyak 40 guru. Pengumpulan data dilakukan dengan mengevaluasi produk berupa perangkat pembelajaran hasil kegiatan workshop. Data dianalisis deskriptif kuantitatif. Hasil menunjukan bahwa perangkat pembelajaran yang disusun oleh guru peserta (90%) sudah baik dalam merencanakan langkah-langkah 5E. Tetapi dalam kaitannya dengan tagihan dan pengetahuan sebagian besar perangkat pembelajaran kurang mencakup keluasan dan kedalaman materi yang ditagih oleh kompetensi dasar pengetahuan dan keterampilan. Dengan demikian walaupun langkah-langkah pembelajaran berbasis siswa aktif dan memenuhi tagihan kurikulum tetapi tingkat asesmen belum memenuhi tagihan. Berdasarkan hasil penjelasan di atas dapat disimpulkan bahwa  90% bapak ibu guru IPA dapat menyusun perangkat pembelajaran cukup baik khususnya terkait sintaks  5E. Kata Kunci : pembelajaran IPA, model 5E, kajian kritis