Pengaruh Minat dan Motivasi Belajar Siswa Terhadap Prestasi Belajar Matematika

  Penelitian ini bertujuan untuk menjelaskan pengaruh minat dan motivasi belajar siswa terhadap prestasi belajar matematika. Jenis penelitian  ini  yaitu dengan menggunakan penelitian kuantitatif dengan metode survei. Uji analisis data yaitu  menggunakan uji statistika non parametrik yaitu wilcoxon. Populasi dalam penelitian ini adalah  seluruh siswa kelas VIII di SMP Muhammadiyah 25 Rantau Prapat. Sampel dalam penelitian ini adalah 25 siswa yang dipilih dengan teknik random sampling. Teknik pengumpulan data dalam penelitian ini adalah penyebaran angket. Dari hasil uji wilcoxon didapatkan nilai probabiltas atau Asymp. Sig (2-tailed) = 0,000  0,05. Dengan demikian dapat dikatakan bahwa Ho ditolak dan Ha diterima artinya minat belajar dan motivasi belajar berpengaruh terhadap prestasi belajar matematika siswa kelas VIII SMP Muhammadiyah 25 Rantau Prapat

PENERAPAN STRATEGI PERMAINAN THE WEBS UNTUK MENINGKATKAN MOTIVASI BELAJAR SISWA PADA MATA PELAJARAN ILMU PENGETAHUAN ALAM DI KELAS V SEKOLAH DASAR ISLAM TERPADU AZIZIYAH PEKANBARU

Penelitian ini bertujuan untuk mengetahui peningkatan motivasi belajar siswa pada mata pelajaran Ilmu Pengetahuan Alam melalui penerapan strategi permainan the webs di kelas V Sekolah Dasar Islam Terpadu Aziziyah Pekanbaru. Penelitian ini di latar belakangi oleh rendahnya motivasi belajar siswa diantaranya siswa kurang serius dalam mengikuti pelajaran, kurang menjawab pertanyaan ketika guru bertanya dan kurang mengerjakan tugas yang diberikan guru. Penelitian ini merupakan penelitian tindakan kelas (PTK). Subjek penelitian adalah guru dan siswa. Objek dalam penelitian ini adalah penerapan strategi permainan the webs dan motivasi belajar. Penelitian ini dilakukan dalam dua siklus dan setiap siklus terdiri dari dua kali pertemuan. Teknik pengumpulan data dengan menggunakan teknik observasi dan dokumentasi. Sedangkan teknik analisis data yang digunakan yaitu dengan teknik deskriptif kualitatif dengan persentase. Berdasarkan hasil penelitian analisis data menunjukkan bahwa motivasi belajar siswa sebelum tindakan hanya 43% atau masih tergolong “Sedang”. kemudian setelah diterapkan strategi permainan the webs pada siklus I, motivasi belajar siswa meningkat menjadi 60% atau tergolong “Tinggi”. kemudian pada siklus II motivasi belajar siswa semakin meningkat menjadi 89% atau tergolong “Sangat Tinggi”. Dengan demikian dapat disimpulkan bahwa penerapan strategi permainan the webs dapat meningkatkan motivasi belajar siswa pada mata pelajaran Ilmu Pengetahuan Alam di kelas V Sekolah Dasar Islam Terpadu Aziziyah Pekanbaru. Kata Kunci : Strategi Permainan The Webs, Motivasi Belajar Siswa, Ilmu Pengetahuan Ala

Antioxidant activity and phenolic profile of four Saudi Arabia date palms (Phoenix dactylifera L.) varieties

Antioxidants as free radical scavengers can combat the oxidative stress that occurs in the body to prevent chronic diseases. Therefore, antioxidant rich foods have a high demand among the healthcare consumers to maintain healthy lifestyle. One of the most potential fruit that are expected to contain high antioxidant compound is Phoenix dactylifera that have a lot of varieties. This study was intended to investigate the total phenolic content, antioxidant activity and phenolic profiles of four varieties of P. dactylifera (Khudori, Sabaka, Nabtat Ali and Soukari). The fleshes of the fruit were extracted using ethanol as the solvent using soxhlet. Total phenolic content (TPC) was measured by using Folin-Ciocalteu calorimetric method and the antioxidant activity was determined by using the 2,2,diphenyl-2-picryl-hydrazyl (DPPH) method. Some phenolic acid and flavonoids profiles of the fruit (gallic acid, p-coumaric acid, ferulic acid and quercetin) were analyzed by using High Performance Liquid Chromatography (HPLC). TPC of the fruit was in the range of 5.8 to 3.8 mg gallic acid equivalents (GAE) per 1 g of fruit with Soukari have the highest value. As for the antioxidant activity, Soukari need the lowest concentration (27.41 ± 1.68 mg/ml) to achieve half inhibition concentration (IC50 ) whereas Khudori need the highest concentration among the four. The HPLC result shows significantly higher amount of gallic acid (15.35 to 8.56 mg/g), and very small amount of ferulic acid (0.19 to 0.006 mg/g) where Soukari have the highest value for all of the compounds. This study demonstrates Soukari variety might possessed the highest antioxidant capacities among the four. Further study by using advanced and green extraction method need to be carried out to comprehend and confirm the potential of this fruit to be developed as nutraceutical and functional food. Keywords: Pheonix dactylifera, Antioxidant, Phenolic profile, HPLC

Antibacterial activity of compounds from Azolla pinnata extracted using Soxhlet and Supercritical Fluid (SFE) methods

The propagation, extraction, and antibacterial studies of Azolla pinnata were carried out in this study. The propagation involved two fertilizers, which were chicken manure and inorganic AB fertilizer. The dry yield was extracted using two methods, which were Soxhlet and supercritical fluid extraction (SFE). Methanolic extracts were obtained and subjected to several antibacterial tests, which include the disk diffusion assay, minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) tests, against Bacillus subtilis, Staphylococcus aureus, Escherichia coli, and Pseudomonas aeruginosa. The results showed that AB fertilizer produced more dry yield compared to chicken manure. The extract yield from Soxhlet exhibited a higher yield than that of SFE, recording its highest at 21.20%. The findings of antibacterial tests revealed that all extracts inhibited the growth of B. subtilis and S. aureus, but none showed inhibition against E. coli and P. aeruginosa. The largest diameter of inhibition zone of 2.67 ± 1.53 mm was obtained by E2 (CM-SFE), with a MIC value of 0.125 mg/mL against B. subtilis. High MBC values further confirm that the mechanism of inhibition against B. subtilis and S. aureus were due to the bacteriostatic properties of the extracts tested

Extraction of fish oil from the skin of Indian mackerel using supercritical fluids.

The total oil was extracted from the ground skin of Indian mackerel (Rastrelliger kanagurta) using various techniques of supercritical fluid extraction (SFE) at 20–35 MPa and 45–75 °C and by the Soxhlet method for comparison. The oil yield increased with pressure and temperature and the highest yields were 24.7, 53.2, 52.8, and 52.3/100 g sample (dry basis) for the continuous, cosolvent, soaking, and pressure swing techniques, respectively, at 35 MPa and 75 °C. The yield from the Soxhlet extraction was 53.6/100 g sample (dry basis). The CO2 consumption was 581.8, 493.6, 484.9 and 290.9 g for the continuous, cosolvent, soaking and pressure swing techniques, respectively, at 35 MPa and 75 °C. The largest recoveries of PUFA, especially the ω-3 family, were achieved from the soaking and pressure swing techniques at 35 MPa and 75 °C. Thus, the pressure swing and soaking techniques are the most effective at extracting the oil from fish skin

Clinacanthus nutans: A review of the medicinal uses, pharmacology and phytochemistry

AbstractClinacanthus nutans Lindau is known as snake grass belonging to the Acanthaceae family. This plant has diverse and potential medicinal uses in traditional herbal medicine for treating skin rashes, insects and snake bites, lesions caused by herpes simplex virus, diabetes, and gout in Malaysia, Indonesia, Thailand and China. Phytochemical investigations documented the varied contents of bioactive compounds from this plant namely flavonoids, glycosides, glycoglycerolipids, cerebrosides and monoacylmonogalatosylglycerol. The pharmacological experiment proved that various types of extracts and pure compounds from this species exhibited a broad range of biological properties such as anti-inflammatory, antiviral, antioxidant, and anti-diabetic activities. The findings of toxicity study showed that extracts from this plant did not show any toxicity thus it can be used as strong therapeutic agents for specific diseased conditions. However, further experiments on chemical components and their mode of action showing biological activities are required to elucidate the complete phytochemical profile and assess to confirm their suitability for future drugs. This review summarizes the medicinal uses, phytochemistry and pharmacology of this plant in order to explore its therapeutic potential and gaps necessitating for prospected research work

Endothelial progenitor cells: a new player in lupus?

Patients with systemic lupus erythematosus (SLE) have a greatly increased risk of cardiovascular disease. There is growing interest in the link between vascular damage and lupus-specific inflammatory factors. Impaired endothelial repair could account for the endothelial dysfunction in this patient group. This review describes the contribution that endothelial progenitor cells could play in the pathogenesis of premature vascular damage in this disease. The methods of isolation, detection, and characterization of endothelial progenitor cells, together with their potential role in repair of the endothelium and as a therapeutic target in SLE, are discussed

Stereospermum fimbriatum as a potential source of phytochemicals: a review of stereospermum genus

Stereospermum fimbriatum is one of the medicinal plants that has been claimed to be used traditionally to treat several illnesses such as stomachache, ear-ache, skin irritation and postpartum illness. The genus of this plant is known to pos-sess medicinal properties in every part of the plant. Therapeutic potential of S. fim-briatum is anticipated based on numerous previous studies that documented variety of phytochemical contents and bioactivity of the genus. The most reported bioactiv-ities of its genus are antimicrobial, antioxidant, anti-diabetic, anti-inflammatory, anti-diarrheal and analgesic activities. S. fimbriatum is a rare species that has not been discovered yet. Thus, this review aims at highlighting the potentials of S. fim-briatum by collecting available data on the bioactivities of its genus and set the di-rections for future research on this plant