Pengaruh Penerapan Model Problem-Based-Learning Berbantuan Computer-Based-Test Terhadap Kemampuan Pemecahan Masalah dan Kemandirian Belajar Matematika

Penelitian yang dilakukan di SMA Negeri 2 Kuta ini bertujuan untuk mengetahui pengaruh penerapan problem-based-learning (PBL) berbantuan computer-based-test (CBT) terhadap kemampuan pemecahan masalah dan kemandirian belajar matematika siswa. Penelitian ekperimen semu ini menggunakan disain post-test only control group design pada populasi siswa kelas X MIA SMA Negeri 2 Kuta yang tersebar ke dalam 11 kelas dengan jumlah siswa sebanyak 392 orang. Selanjutnya, metode cluster random sampling digunakan untuk menetapkan kelas X MIA 3 dan kelas X MIA 5 sebagai sampel penelitian dengan jumlah sampel sebanyak 72 orang. Data penelitian ini berupa data pemecahan masalah matematika dan kemandirian belajar siswa masing-masing dikumpulkan dengan tes essai dan kuesioner yang selanjutnya dianalisis dengan uji Manova dengan taraf signifikansi 5%. Hasil analisis data menujukkan bahwa nilai F dari uji wilks lambda sebesar 11,488 dengan nilai signifikasi 0,000. Jika nilai signifikansi 0,000 dibandingkan dengan alpha 0,05 maka nilai tersebut jauh lebih kecil dan dapat diputuskan untuk menolak H0. Berdasarkan hasil tersebut, dapat disimpulkan bahwa penerapan pembelajaran PBL berbantuan CBT berpengaruh positif terhadap kemampuan pemecahan masalah dan kemandirian belajar siswa SMA Negeri 2 Kuta

PERANAN PESTISIDA BOTANI DALAM MENDUKUNG PERTANIAN ORGANIK

Until recently the use of synthetic pesticides to control pest and plant diseases proved effective, but on the other hand, the excessive use of synthetic pesticides cause many negative effects, such as the development of pest and disease resistance, second pest explosion, death of natural enemies and pesticide residues in food and environment. One alternative that can be done to solve this problem is the use of botanical pesticides. Botanical pesticides are compounds produced as a plant defence response to disturbances and stimulation. These compounds generally are of secondary metabolites that have many functions, such as growth hormones (Auxin, gibberellins and cytokinins), anti-fungal or anti-bacterial, antibiotics, and toxic to animals and insects. The advantage of botanical pesticides is that they have toxicity similar to synthetic pesticides, but the botanical pesticides can be used to support sustainable organic agriculture.  Experiments in the utilization of botanical pesticides to control plant pest have been carried out. One example application is the use of botanical insecticides from “Brotowali” leaf extract (Tinospora crispa) to control the diamond black caterpillars (Plutella xylostella)  on cabbage plants. In addition, the use of ‘basil’ oil (Ocimum tenuiflorum) has a real impact in population control of the fruit fly (Bactrocera dorsalis). In addition to pest control, botanical pesticides are also reported to effectively control plant diseases. Use of ‘galangal’ (Alpinia galanga) and papaya (Carica papaya) has a high ability to inhibit the growth of Ceratocystis sp. On PDA and fruits. The combination of ‘betel’ leaf extract (Piper betle) and ‘galangal’ (A galanga) can suppress the growth of banan wilt disease caused by Fusarium oxysporum and / or the Ralstonia solanacearum. The use of ‘galangal’ (A. Galanga) extract with a concentration of 5%, can also inhibit the growth of stem rot disease (F. oxisporum) on vanilla seedlings. In addition, the use of ‘betel’ ieaf P. Bettle in the field can suppress black rot disease on cocoa pods (cocoa black pd disease

Pengembangan Perangkat Blended Learning Kontekstual Untuk Pembelajaran Program Linear Siswa SMK

Blended learning dengan membuka kelas maya sangat penting untuk mengorganisasikan program pembelajaran siswa SMK. Bila sedang melaksanakan tugas kerja praktek lapangan, maka akan sangat bermanfaat bagi siswa dan guru yang tidak melakukan pembelajaan tatap muka secara penuh. Penelitian ini bertujuan untuk mendapatkan perangkat pembelajaran blended learning kontekstual yang berkualitas valid, praktis, dan efektif. Jenis penelitian yang digunakan adalah penelitian desain. Dalam penelitian ini dikembangkan perangkat pembelajaran berupa Rencana Pelaksanaan Pembelajaran, Kelas Maya, dan Instrumen Penilaian. Subjek yang digunakan dalam penelitian ini disesuaikan dengan tahapan-tahapan penelitian dan teknik pengambilannya menggunakan purposive sampling. Penelitian ini dilaksanakan di SMK N 3 Denpasar. Metode yang digunakan adalah metode observasi, angket, tes, dan wawancara. Instrumen yang digunakan adalah lembar validasi, lembar observasi keterlaksanaan pembelajaran, angket respons siswa dan guru, tes hasil belajar, dan pedoman wawancara. Data yang telah dikumpulkan diolah secara deskriptif. Hasil yang diperoleh dalam penelitian ini adalah perangkat pembelajaran blended learning kontekstual yang berkualitas valid, praktis, dan efektif

Bacillus subtilis Cw1Q (previous YjbJ) is a bifunctional enzyme exhibiting muramidase and soluble-lytic transglycosylase activities

CwIQ (previous YjbJ) is one of the putative cell wall hydrolases in Bacillus subtilis. Its domain has an amino acid sequence similar to the soluble-lytic transglycosylase (SLT) of Escherichia coli Slt70 and also goose lysozyme (muramidase). To characterize the enzyme, the domain of CwIQ was cloned and expressed in E. coil. The purified CwIQ protein exhibited cell wall hydrolytic activity. Surprisingly, RP-HPLC, mass spectrometry (MS), and MS/MS analyses showed that CwIQ produces two products, 1,6-anhydro-N-acetylmuramic acid and N-acetylmuramic acid, thus indicating that CwIQ is a bifunctional enzyme. The site-directed mutagenesis revealed that glutamic acid 85 (Glu-85) is an amino acid residue essential to both activities. (C) 2010 Elsevier Inc. All rights reserved.ArticleBIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS. 398(3):606-612 (2010)journal articl

Cell Wall Lytic Enzymes And Their Role In Bacteriophages Infection

Use of chemical pesticides has been shown to have many negative side effects, such as insecticide resistance and resurgence, an outbreak of secondary pests and diseases, the disappearance of parasitoid and predator species as well as residual effects on food crops and on the environment. Over the past 60 years, both the number of agricultural toxins in the environment and incidence rates of toxin-related diseases has increased dramatically. The most effective way to combat this problem is through the use of natural predators. One of the best examples of this is the use of host-specific bacteriophages to control bacterial diseases. The mechanism of infection is a very interesting one. To break through the bacterial cell wall the bacteriophages must produce a range of lytic enzymes.  This review will examine and discuss studies of these site-specific cell wall lytic enzymes and their roles in the infection of bacteriophages

Pemodelan Kunjungan Wisatawan Mancanegara ke Provinsi Bali

Pariwisata Provinsi Bali merupakan salah satu kegiatan ekonomi utama di koridor ekonomi Provinsi Bali-Nusra dalam Programr Masteplan Percepatan dan Perluasan Pembangunan Ekonomi Indonesia (MP3EI). Pariwisata Provinsi Bali cukup berpengaruh terhadap perekonomian Provinsi Bali. Tujuan penelitian ini untuk memodelkan kunjungan wisatawan mancanegara ke Provinsi Bali. Variabel-variabel yang diamati adalah jumlah wisatwan mancanegara ke Provinsi Bali , tingkat inflasi indonesia, IHK Indonesia, nilai tukar mata uang dolar Amerika terhadap rupiah, serta PDRB Provinsi Bali. Data yang digunakan dalam penelitian ini merupakan data sekunder berupa data bulanan dari bulan Januari 2004 sampai Juni 2014. Metode yang digunakan dalam penelitian ini adalah kointegrasi dan Error Corection Model (ECM).Hasil penelitian menunjukkan terjadi keseimbangan jangka panjang antara jumlah kunjungan wisatawan mancanegara dengan variabel-variabel bebas yang diamati dengn nilai R2=0.888632, sedangkan R2 untuk persamaan jangka pendek sebesar 0.194759 dengan koefisien koreksi keseimbangan sebesar 0.371849 menunjukkan bahwa pada periode sebelumnya t-1, jumlah kunjungan wisatawan melebihi hubungan keseimbangannya, sehingga pada waktu t harus berkurang sebesar 37% agar tercapai keseimbangannya. Kata kunci:jumlah kunjungan wisatawan, kointegrasi, EC

Papaya Ringspot Virus (PRSV) Causing Ringspot Disease on Papaya in Bali

In a survey of papaya plantation in Tabanan, Bali, some papaya cultivars were found showing papaya ringspot disease symptomps i.e. yelowing and mottle on leaves; and ring spot on fruits. The analysis of enzyme linked immunosorbent assay (ELISA) of symptom leaf with papaya ringspot virus (PRSV) antiserum shown the disease was corresponding to the PRSV. The test results showed that PRSV infected papaya in Bali and detected in Tabanan. Previously, there has been no reports of the existence of this disease in the area of ​​Bali. The objective of the study were to observe the variations of disease symptoms caused by PRSV, mapping the disease spread in Bali, and  determine the molecular character of  PRSV Bali isolate. Surveys were conducted to observe the variations of disease symptoms and mapping the disease spread. Molecular method was used to determine the coat protein (CP) sequence. Analysis of leaf samples from diseased plants by reverse transcription-polymerase chain reaction (RT-PCR) was conducted using a pair of primers specific to PRSV. Study result shown the disease was detected in Bangli village, Tabanan regency with the infection index 73,33% (11/15), whereas samples from other survey sites not found infected with PRSV.  On samples that infected with PRSV were found yelowing and stunting on leaves; and ring spot on fruits. Amplicons of 905 bp were successfully amplified. Result from BLAST and sequence alignments showed that Bali isolate had considerable homology to the China (Accession No. KF 033092.1) isolate (99.45% na-level). Results of phylogenetic analysis using Maximum Parsimony approaches with 1000 bootstrap replications indicates that Bali isolate is in a clade with the China  isolates (Accession No. KF 033092.1, KF 033089.1, KF 033078.1). Keywords: papaya , symptom, infection index, disease spread, molecular character

Pengaruh meas berbantuan geogebra terhadap kemampuan pemahaman konsep dan disposisi matematika siswa

AbstrakPenelitian ini bertujuan untuk mengetahui apakah pendekatan Model Eliciting Activities (MEAs) berbantuan Geogebra berpengaruh terhadap kemampuan pemahaman konsep  dan disposisi matematika siswa. Penelitian ini merupakan eksperimen dengan post-test only control group design pada populasi yang terdiri 132 siswa kelas VIII SMP Taman Pendidikan 45 Denpasar yang tersebar dalam 4 kelas. Penarikan sampel menggunakan cluster random sampling  dan ditetapkan kelas VIIIA dan VIIIC sebagai sampel penelitian. Data  penelitian berupa data pemahaman konsep dan disposisi matematika dikumpulkan masing-masing dengan tes uraian dan angket yang selanjutnya dianalisis dengan Uji Manova dengan taraf signifikansi 5%. Hasil analisis data menunjukan bahwa  nilai F dari uji wilks lambda sama dengan 5,656, dengan nilai signifikansi 0,023. Jika nilai signifikansi 0,023 dibandingkan dengan alpha 0,05, maka nilai tersebut jauh lebih kecil, sehingga dapat diputuskan Ho ditolak. Oleh karena itu, hasil eksperimen ini menunjukkan bahwa Pendekatan MEAs berbantuan Geogebra berpengaruh terhadap kemampuan pemahaman konsep dan disposisi matematika siswa

Implementation of Green Practices in Improving Service Quality of Food & Beverage Department at Hotel Indigo Bali Seminyak Beach

Purpose: This study aims to determine the implementation of green practices in improving the quality of service in the food & beverage department at Hotel Indigo Bali Seminyak Beach. Research methods: The data collection methods used in this study were observations, questionnaires, interviews and literature studies. The analysis technique used is descriptive qualitative, namely explaining systematically the data obtained during the study, so as to describe the state or status of a problem clearly and descriptively quantitatively using a 4-level likert scale. The number of respondents used was 12 respondents from the food & beverage department staff. Findings: Overall the application of green practices in service quality has been applied optimally. There are several stages in the process of improving service quality which in the application of green action the average value is 3.11 which means that it has been maximally applied, green food average value is 3.06 which means it is quite optimally applied, green dionation with an average value of 2.86 which is quite optimally applied. Implication: There is a need to evaluations, conducting SOP training and conducting supervision while working