Abstrak: Literasi sains penting dikembangkan bagi peserta didik agar mereka memiliki kemampuan dalam menjelaskan fenomena secara ilmiah, mengevaluasi desain penyelidikan ilmiah dan menginterpretasi dan membuktikan data secara ilmiah. Salah satu model yang bisa mendukung pencapaian kompetensi tersebut adalah pembelajaran Inkuiri Bebas. Tujuan penelitian ini adalah untuk mengetahui pengaruh model inkuiri bebas terhadap kemampuan literasi sains siswa kelas XI SMAN 2 Labuapi. Jenis penelitian yang digunakan adalah eksperimen semu (Quasi Experiment), dengan desain nonequivalent pretest-posttest kontrol group desain. Populasi penelitian adalah seluruh siswa kelas XI MIPA (37 orang), tekhnik pengambilan sampel dengan cara sampling total. Data dianalisis dengan menggunakan MANOVA). Hasil penelitian menunjukan bahwa model inkuiri bebas berpengaruh signifikan terhadap kemampuan literasi sains peserta didik (p = 0,002 < 0,05), sehingga dapat disimpulkan bahwa model inkuiri bebas bisa digunaka untuk meningkatkan kompetensi literasi sains siswa kelas XI SMAN 2 Labuapi.Abstract: Science literacy skills are important to be developed for students so they have the ability to explain phenomena scientifically, evaluate the design scientific inquiry and interpret evidence and data scientifically. One of model that can be support achieving these competencies is Free Inquiry Model. The research aimed is to know the influence of the free inquiry model to the science literacy skills of grade XI state senior high school 2 Labuapi. This type of research used was Quasi-Experiment, with a Non-Equivalent Pretest-Posttest Control Group Design. The study population was all students of grade XI (37 studens), the sampling technique was total sampling. Data were analyzed using MANOVA. The results show that the free inquiry model influences significant effect on the science literacy skills of students (p = 0.002 < 0.05), so it can be concluded that the free inquiry model could be used to improve the science literacy competencies of grade XI state senior high school 2 Labuapi.

Telah dilakukan penelitian tentang potensi probiotik Bakteri Asam Laktat (BAL) dari susu segar kambing Etawa yang difermentasi dalam bambu Betung (Dendrocalamus asper) dan bambu Tali (Gigantochloa apus). Penelitian ini bertujuan untuk Mengetahui potensi probiotik BAL yang dihasilkan dari fermentasi susu segar kambing Etawa dalam bambu Betung (Dendrocalamus asper) dan bambu Tali (Gigantochloa apus). Jenis penelitian ini adalah deskriptif eksploratif. Uji probiotik mengacu pada ketahanan isolat terhadap pH 3,0 dan uji ketahanan isolat terhadap garam empedu 0,3% dilakukan dengan metode tuang. Uji aktivitas antibakteri dilakukan dengan metode difusi agar. Ketahanan BAL yang diperoleh dari bambu Betung pada pH 3,0 sebesar 99,53%, sedangkan ketahanan BAL dalam garam empedu 0,3% sebesar 94,74%. Ketahanan BAL yang diperoleh dari bambu Tali tehadap pH 3,0 sebesar 95.74%, sedangkan ketahanan BAL dalam garam empedu 0,3% sebesar 97.96%. Aktivitas antibakteri Escherichia coli dari BAL yang diperoleh dari bambu Betung tergolong sedang yaitu menghasilkan zona bening sebesar 8-10 mm, sedangkan BAL yang diperoleh dari bambu Tali tidak menunjukkan adanya aktivitas penghambatan. Oleh karena itu BAL dari susu segar kambing Etawa yang difermentasi dalam bambu Betung berpotensi sebagai probiotik.

This research aims to determine the validity of online learning video based on the Science Technology Society (STS) and its effect on biology learning outcomes at SMA Negeri 1 Labuapi. The type of research is research and development with the ADDIE model. The research sample was class X students at SMA Negeri  1 Labuapi with as many as 12 students for the control class and 15 students for the experimental class. Research data obtained from learning outcomes tests (post-test scores) on environmental change material. The results of data analysis showed that the level of validity of the developed video obtained a percentage of 84% in terms of media which include very valid criteria and 86% in terms of material which include very valid criteria. The results of data analysis of learning outcomes data showed that there was a difference in the average post-test score between the experimental class through the application of learning using video which combined with the STS approach and the control class through the application of conventional learning. The average score of the post-test in the experimental class was 84.23, while the average score of the post-test in the control class was 67.17. The significance value of two independent sample t-test obtained is 0.002, the significance value obtained is smaller than 0.05 (p-value < 0.05), so Ho is rejected. The conclusion of this research that the video developed has very valid criteria and the application of learning using video based on the science technology society (STS) approach has a significant effect on improving biology learning outcomes at SMA Negeri 1 Labuapi.

Mangrove plants are widely used traditionally in treating various types of infectious diseases in the people of Lombok Island. This study aims to isolate and characterize endophytic bacteria from the roots, stems, leaves and fruits of mangrove Rhizophora mucronata Lam. which grow in coastal region of Lombok Island (Gili Sulat), and to determine their antibacterial activity against some patogenic bacteria, such as Escherichia coli, Staphylococcus aureus, Bacillus cereus and Pseudomonas aeruginosa. Media used for isolation were NA and TSA. Antibacterial activity tests were carried out with well diffusion methods, and the level of antibacterial activity refers to the category according to Vasanthakumari. Characterization of endophytic bacteria includes their colony morphology, cell morphology, and physiology. Eighteen (18) endophytic bacteria isolates were obtained. Results showed that 12 isolates of endophytic bacteria had moderate (8-12mm) to strong category (Φ > 12mm) of their antibacterial activity against B. cereus and P. aeruginosa. Isolate of NBM2(1) gave the strongest antibacterial activity against B. cereus. It can be concluded that endophytic bacteria isolated from mangrove R. mucronata Lam. is highly potential to be developed as a new antibacterial source, especially against B. cereus pathogenic bacterium.

Topik penelitian ini yaitu bakteri coliform sebagai indicator pencemaran air. Penelitian mengenai bakteri coliform sebagai indikator pencemaran air di sungai Unus telah dilaksanakan pada bulan Agustus tahun 2019. Penelitian ini bertujuan untuk (1) Menentukan seberapa tinggi tingkat pencemaran air sungai Unus sesuai parameter total koliform dan koliform fekal sebagai indikator pencemaran air, dan (2) Menentukan kualitas air sungai Unus dilihat pada parameter total koliform dan koliform fekal berdasarkan Peraturan Pemerintah Nomor 82 Tahun 2001. Jenis penelitian ini adalah penelitian deskriptif eksploratif. Populasi penelitian ini adalah air sungai Unus dengan panjang ± 7.500 meter, meliputi Kecamatan Sandubaya di Kelurahan Dasan Cermen, Kecamatan Mataram di Kelurahan Pagesang, Kecamatan Sekarbela Kelurahan di Karang Pule dan Kelurahan Tanjung Karang. Teknik penentuan sampel adalah sistematik sampling berdasarkan jarak. Jarak antara titik adalah 833 meter. Hasil analisis data menunjukkan bahwa Sungai Unus telah mengalami pencemaran oleh bakteri koliform dengan total koliform ≥ 16.000 MPN/100ml dan koliform fekal ≥ 16.000 MPN/100ml. Sedangkan tingkat cemaran bakteri koliform di Sungai Unus telah melebihi ambang batas jenis air permukaan kelas II-IV. Sumber pencemaran bakteri koliform bersumber dari buangan limbah rumah tangga, perilaku buang air besar sembarangan masyarakat di Sungai dan cemaran dari kotoran hewan ternak.

Centella asiatica contains some secondary metabolic compounds, e.g. tannin, alkaloid, flavonoid, saponin, and triterpenoid, known as medicinal plants as well, one of which is as a anti-bacterial. The present study aimed at examining the activities of Centella asiatica extract towards the growth of Staphylococcus aureus and Escherichia coli. The extraction of C. asiatica was done by using ethanol and ethyl acetate solvents and the activity test employed seaweed diffusion. The hindrance power of Centella asiatica extract was tested in 30%, 50%, and 95% and the data were analyzed qualitatively with the standard issued by the Clinical and Laboratory Standard Institute and quantitatively with ANOVA. It shows that Centella asiatica extract in the ethyl acetate can hinder the growth of Staphylococcus aureus in the acetate concentration of 50% and 70% at the sensitive level and Escherichia coli at the intermediate level in the extract concentration of 50% and 70%. However, Centella asiatica activities in the ethanol solvent hinders the growth of either Centella asiatica or Escherichia coli with resistant category in the extract concentration of 70%. The hindrance power of Centella asiatica extract in ethyl acetate in the growth of Staphylococcus aureus is significantly more effective than that of Centella asiatica extract in the ethanol solvent

Phosphate solubilizing rhizobacteria can be used as a component in biofertilizer formulations to increase local and national food production without causing adverse risks to the environment compared to the use of chemical fertilizers. In this regard, screening and identification of phosphate solubilizing bacteria from the rhizosphere of several mangrove species that grow on the coast of Lombok Island has been carried out. The method of isolation used is the Pikovskaya method. Screening and identification activities have obtained 5 isolates of mangrove rhizosphere bacteria (BRM) which are indicated by their ability to form clear zones on Pikovskaya media, namely isolates BRM1 and BRM4 (isolated from the rhizosphere of Avicennia marina), BRM2 and BRM3 (isolated from the rhizosphere of Rhizophora apicullata), BRM5 (isolated from the rhizosphere of R. stylosa). All rhizobacteria isolates were identified as Gram-positive bacteria. Molecular analysis based on the comparison of 16S rRNA gene sequences of isolates with the genome database at GenBank (NCBI) using Mega 10 software, showed that all BRM isolates occupied the same cluster as bacterial species from the Genus Paenibacillus in the dendrogram of the phylogenetic tree, namely Paenibacillus sp. JWLB1 strain, Paenibacillus sp. Strain NO13, P. cineris strain cu1-7, P. favisporus strain CHP14, with genetic distance ranging from 1.3 to 1.4. Many species of the Genus Paenibacillus are currently known to play an important roles as plant growth-promoting bacteria. The BRM isolates obtained in this study can be further developed as a biofertilizer component (inoculant) in saline and dryland agriculture.

Penelitian  ini  bertujuan  untuk  (1)  menghasilkan  perangkat  pembelajaran  berupa  Lembar kerja Peserta Didik (LKPD) berbasis keterampilan proses sains dalam model inkuiri terbimbing materi   struktur   dan   fungsi   jaringan   tumbuhan   yang   layak   diterapkan   sebagai   perangkat pembelajaran  tambahan   berdasarkan  penilaian  validator  (2)   Menghasilkan   LKPD  berbasis keterampilan  proses  sains  dalam  model  inkuiri  terbimbing  pada  materi  struktur  dan  fungsi jaringan tumbuhan yang dapat diterapkan sebagai perangkat pembelajaran tambahan berdasarkan tanggapan peserta didik Penelitian ini   dilakukan di SMPN 3 Mataram dan SMPN 7 Mataram. Prosedur pengembangan perangkat mengikuti model pengembangan 4-D yang terdiri dari define, design, develop, dan disseminate. Tehnik pngumpulan data dilakukan meggunakan angket untuk penilaian  ahli  dan  respon  peserta  didik.  Hasil    penelitian  ahli  menunjukkan  Skor  penilaian terhadap  LKPD  sebesar  81,48%  dan  termasuk  dalam  kriteria  sangat  layak.  Uji  coba  terbatas LKPD  pada  peserta  didik  kelas  VIII  menunjukkan  skor  77,37%  dan  termasuk  dalam  kategori dapat diterapkan.