PENERAPAN MODEL PROJECT BASED LEARNING PADA PEMBELAJARAN MENGONTRUKSI KARYA ILMIAH DI SMA

The project based learning model is a learningimodel that seeks to develop competence and learning skills through a series of activities to plan, implement and produce certain products which are contained in a container in the formiof a project. The objectivesito be achievediin this study are to describe the applicationiof the project basedilearning model to learning to construct scientific work in class XI IPA at SMA Negeri 9 Tanjung Jabung Barat. The approachiin this research is a qualitativeiapproach. The results of this study are that the application of PjBL can be used in learning to construct scientific work. This is evidenced by the value of students who are categorized as good. The PjBL learningimodel can increase motivationiand persistence in the learning processModel pembelajaran berbasis proyek adalah model pembelajaran yang berupaya mengembangkan kompetensi dan keterampilan belajar melalui rangkaian kegiatan merencanakan, melaksanakan, dan menghasilkan produk tertentu yang dituangkan dalam wadah berupa proyek. Tujuan yang ingin dicapai dalam penelitian ini Untuk mendeskripsikan Penerepan model project based learning pada pembelajaran mengontruksi karya ilmiah di kelas XI IPA SMA Negeri 9 Tanjung Jabung Barat. Pendekatan pada penelitian ini adalah pendekatan kualitatif. Hasil dari penelitian ini ialah dalam penerapan PjBL dapat digunakan dalam pembelajaran mengontruksi karya ilmiah. Hal ini dibuktikan dengan nilai siswa yang dikatagorikan baik. Model pembelajaran PjBL dapat meningkatkan motivasi dan ketekunan dalam proses pembelajara

PENERAPAN MODEL PROJECT BASED LEARNING PADA PEMBELAJARAN MENGONTRUKSI KARYA ILMIAH DI SMA

The project based learning model is a learningimodel that seeks to develop competence and learning skills through a series of activities to plan, implement and produce certain products which are contained in a container in the formiof a project. The objectivesito be achievediin this study are to describe the applicationiof the project basedilearning model to learning to construct scientific work in class XI IPA at SMA Negeri 9 Tanjung Jabung Barat. The approachiin this research is a qualitativeiapproach. The results of this study are that the application of PjBL can be used in learning to construct scientific work. This is evidenced by the value of students who are categorized as good. The PjBL learningimodel can increase motivationiand persistence in the learning processModel pembelajaran berbasis proyek adalah model pembelajaran yang berupaya mengembangkan kompetensi dan keterampilan belajar melalui rangkaian kegiatan merencanakan, melaksanakan, dan menghasilkan produk tertentu yang dituangkan dalam wadah berupa proyek. Tujuan yang ingin dicapai dalam penelitian ini Untuk mendeskripsikan Penerepan model project based learning pada pembelajaran mengontruksi karya ilmiah di kelas XI IPA SMA Negeri 9 Tanjung Jabung Barat. Pendekatan pada penelitian ini adalah pendekatan kualitatif. Hasil dari penelitian ini ialah dalam penerapan PjBL dapat digunakan dalam pembelajaran mengontruksi karya ilmiah. Hal ini dibuktikan dengan nilai siswa yang dikatagorikan baik. Model pembelajaran PjBL dapat meningkatkan motivasi dan ketekunan dalam proses pembelajara

Changes in growth, survival and digestive enzyme activities of Asian redtail catfish, Mystus nemurus, larvae fed on different diets

A study was conducted to determine the effects of different dietary treatments on the growth, survival and digestive enzyme activities of Mystus nemurus larvae. Newly hatched larvae were reared for 14 days in twelve 15 L glass aquaria (for growth and survival) and eight 300 L fiberglass tanks (for enzyme samples) at a stocking density of 15 larvae L-1. Beginning at 2 days, the larvae were randomly assigned to Artemia nauplii, a microbound diet and a 50:50 combination of live food-microbound diet, while another group was unfed. All treatments were triplicated (growth and survival) or duplicated (enzyme development). The results showed that, M. nemurus larvae which fed on Artemia nauplii gave the highest survival rate (83.7%), followed by those fed on a combination diet (56.0%) and a microbound diet (26.5%). All unfed larvae did not survive beyond Day 9. Artemia had also given the best growth (20.4 ± 1.4 mm TL and 37.2 ± 6.0 mg wet weight) for the catfish larvae. This was followed by the combination diet (18.3 ± 0.6 mm TL and 32.6 ± 3.4 mg wet weight) and the microbound diet (11.0 ± 0.1 mm TL and 11.9 ± 0.9 mg wet weight), respectively. Pepsin began to significantly appear in M. nemurus larvae at 4 days old for all treatments, while chymotrypsin, trypsin and amylase were present even in the newly hatched larvae. In general, highest enzyme activities were observed among larvae which fed on a combination diet, followed by those fed on live and artificial diets, respectively. This suggested the important role of exogenous enzymes from live food in the larval digestion particularly at the early feeding stages.Key words: Mystus nemurus, Artemia nauplii, larvae, microbound diet, combination diet

Nutritional evaluation of fermented palm kernel cake using red tilapia

The use of palm kernel cake (PKC) and other plant residues in fish feeding especially under extensive aquaculture have been in practice for a long time. On the other hand, the use of microbial-based feedstuff is increasing. In this study, the performance of red tilapia raised on Trichoderma longibrachiatum fermented PKC (TL-PKC) was evaluated. Seven isonitrogenous and isocaloric diets were formulated. Reference diet, D1 had no PKC, while the other diets, D2 to D5 contained 10, 20, 30and 40% fermented PKC (TL-PKC), respectively. All diets contained 1% chromic oxide as an inert marker. Red tilapias of average weight of 2.5 g were fed on these six diets for a period of 8 weeks. The fish were fed at 4% of their body weight, twice a day. There was no difference in mortality rate of fish on the various diets used. However, weight gain decreased with an increase of TL-PKC in diets. There were significant (P £ 0.05) differences in the apparent digestibility coefficient (ADC) of protein and drymatter between the reference diet and diet containing TL-PKC. The ADC of both protein and dry matter generally decrease when the percentage TL-PKC was increased in the test diets. There was also no significant difference in carcass protein content among fish on the various diets. However, there was a significant (P £ 0.05) increase in the levels of phosphorus, calcium and copper in the carcass of fish raised on TL-PKC, but the level of lipids was significantly reduced. Decreasing dry matter and protein digestibility with corresponding weight reduction may have resulted from increased crude fibre content of diets with TL-PKC

A critical review on the contributions of chemical and physical factors toward the nucleation and growth of large-area graphene

Since the first isolation of graphene over a decade ago, research into graphene has exponentially increased due to its excellent electrical, optical, mechanical and chemical properties. Graphene has been shown to enhance the performance of various electronic devices. In addition, graphene can be simply produced through chemical vapor deposition (CVD). Although the synthesis of graphene has been widely researched, especially the CVD growth method, the lack of understanding of various synthetic parameters still limits the fabrication of large-area and defect-free graphene films. This report critically reviews various parameters affecting the quality of CVD grown graphene to understand the relationship between these parameters and thechoice of metal substrates and to provide a point of reference for future studies of large-area, CVD-grown graphene

Evaluation of in vitro Vibrio static activity of Shewanella algae isolated from healthy Penaeus monodon

To conquer disease problem in shrimp industries, probiotic biocontrol is a well known remedy now. The antagonistic ability of separated isolates from different parts of juvenile Penaeus monodon werescreened against shrimp Vibrio pathogens; Vibrio parahaemolyticus and Vibrio alginolyticus. The most antagonistic effect was observed for an isolate that was primarily identified as Shewanella algae usingconventional methods followed by Biolog microlog software. Since production of antagonistic agents rely on cultural conditions, antagonistic ability of candidate probioic against the mentioned Vibrios was assessed using Response Surface Methodology, with central composite design in which four independents variables were assumed: temperature (10 - 50°C), pH (6 -10), NaCl concentration (0 - 50%)and time (12 – 60 h). The coefficients of multiple determinations (R2), for the responses of antagonistic effect of S. algae against V. parahaemolyticus and V. alginolyticus values were 0.807 and 0.805,respectively. Concentration of the NaCl exhibited least influence on the antibacterial effect of candidate probiotic while the other independent variables exhibited different degree of affect. The candidateprobiotic revealed a reasonable antibacterial response in quite a wide range of temperature and pH in which the maximum levels were in the same range of optimum shrimp culture

Specific detection of fungal pathogens by 18S rRNA gene PCR in microbial keratitis

<p>Abstract</p> <p>Background</p> <p>The sensitivity and specificity of 18S rRNA polymerase chain reaction (PCR) in the detection of fungal aetiology of microbial keratitis was determined in thirty patients with clinical diagnosis of microbial keratitis.</p> <p>Methods</p> <p>Corneal scrapings from patients were used for Gram stain, culture and PCR analysis. PCR was performed with primer pairs targeted to the 18S rRNA gene. The result of the PCR was compared with conventional culture and Gram staining method. The PCR positive samples were identified by DNA sequencing of the internal transcribed spacer (ITS) region of the rRNA gene. Main outcome measures were sensitivity and specificity of PCR in the detection of fungus in corneal keratitis.</p> <p>Results</p> <p>Combination of microscopy and culture gave a positive result in 11 of 30 samples of microbial keratitis. PCR detected 10 of 11 samples that were positive by conventional method. One of the 19 samples that was negative by conventional method was positive by PCR. Statistical analysis revealed that the PCR to have a sensitivity of 90.9% and specificity of 94.7% in the detection of a fungal aetiology in microbial keratitis.</p> <p>Conclusion</p> <p>PCR is a rapid, sensitive and useful method to detect fungal aetiology in microbial keratitis.</p

Bio-composting oil palm waste for improvement of soil fertility

Sources of bio-compost as agro-industrial wastes includes wide range of oil palm wastes viz. waste, biomass, palm kernels, empty fruit bunch, mill effluent, trunk and frond compost. Various composting processes are summarized in brief with distinct reference of oil–palm composting covering aerated static pile, and co-composting with earthworms (vermicomposting). However, in-vessel composting and windrow composting has meritorious advantages in composting. This review article refers to various significant roles played by microorganisms associated. Noteworthy study of bio-compost applications and procedures are correspondingly glosses framework of ecological, economical and agro-ecosystemic benefits