ABSTRACT Fibers nut activated charcoal has been used as an adsorbent to remove cadmium (Cd2+) and lead (Pb2+) ions in solution; The activated charcoal of fibers nut was made by carbonization at 400oC for ± 2 hours and chemical activation using various concentration of H2SO4 (2.5; 5.0 and 7.5%). The characterization result showed that fibers nut activated charcoal using H2SO4 7.5% had 2,69% of…
ABSTRACT Sembukan or kasembukan often called kentut-kentut leaves (Paederia scandens) belonging to family Rubiaceae is one of medicinal plant species in Indonesia. Phytochemical test showed that the stem of this plant contains secondary metabolites terpenoids and saponins. Metabolites of the stems were extracted using n-hexane by maceration method. The n-hexane extract obtained was separated u…
ABSTRACT Sago waste has potential to become adsorbent because it contains cellulose and lignin compounds. In this research, adsorbent of sago waste was made by heating at 105 °C for 24 hours. The sago waste that have been made was characterized and then applied to the adsorption process to improve the quality of peat water as for drinking water. Some of the parameters in the peat water were a…
ABSTRACT Amylase is an hydrolase enzyme which hydrolyze starch into maltose and glucose. Amylase has been produced by Pseudomanas stutzery LBKURCC45, LBKURCC46, and LBKURCC55, the endophytic bacteria. Amylase activity was determined based on the reducing sugars formed from starch hydrolisis by amylase with the DNS (dinitrosalicylic acid) method on a UV-Vis spectrophotometer at 540 nm. The high…
SUMMARY Formaldehyde was used by fish seller or fishermen to preserve the freshness and the seafood quality either it fresh or boiled, tuna fish is an example of it. The study was undertaken to determine the formaldehyde content and relationship between addition formaldehyde based on high levels of protein in fresh and boiled tuna fish. This study uses a High Performance Liquid Chromatography …
ABSTRACT Pyrazoline is one of secondary metabolites from alkaloid and has many bioactivity such as anticancer and has high toxicity. Pyrazoline 5-(2- fluorophenyl)-3-(naphthalen-2-yl)-4,5-dihydro-1H-pyrazole (PH CN2-2F) can be synthesized by reacting chalcone (E)-3-(2-fluorophenyl)-1-(naphthalen-2-yl)prop- 2-enon (CN2-2F) and hydrazine hydrate using glacial acetic acid (CH3COOH) as cataly…
ABSTRACT Tabernaemontana macrocarpa Jack is one of the plants with the family Apocynaceae found in village of Rantau Langsat, district of Sungai Gangsal, Indragiri Hulu, Riau Province. Phytochemical test this plant extract are contains alkaloids, terpenoids and flavonoids. Isolation of samples by maceration method using methanol was obtained methanol extract of total is 645,13 g. The methanol …
ABSTRACT Essential oil is volatile oil and has many benefits. One of the plants that potential as source of essential oil is O. basilicum. O. basilicum is a multifunctional plant that has been used as a traditional medicine to cure diseases. In this research, isolation of essential oil from leaves of O. basilicum was carried out using Clevenger-hydrodistillation method, the chemical components…
This research is motivated by the poor performance of fourth graders studying SDS Aisyiyah Bengkalis. Detailed criteria Minimum Value (KKM) school science set 65.00. Among the students who totaled 23 people, only 10 people (43.48%), which reached the KKM, whereas 13 patients (56.52%) who have not reached the KKM, with an average value of 62.17. This research is a classroom action research …
The background of the problems in this study is the lack of student learning outcomes, especially in Maths. According to this problem, the researchers have been conducting research to improve student learning outcomes by implementing cooperative learning methods make a match. The type of research is classroom action research (PTK), and carried out in two cycles. While the subject of this study …
This research is motivated by the low learning outcomes Civics class V students of SD Negeri 59 Sebangar District of Saber, with an average grade 57.92. While the value of minimum completeness criteria (KKM) Civics is 70, among the students who totaled 24 people only 7 people who reach KKM. This research is a classroom action research (PTK) by applying cooperative learning model Mind Mappi…
The process of learning the Indonesian language in the class I SDN 009 Kerampal Kecamatan Batang Gansal on average are still difficulties in reading in textbooks and written Indonesian teacher at the blackboard. The low reading skills seen among the 24 first-class students only 5 students (20.8%) were able to read fluently and correctly, while 19 students (79.2%) have not been able to read…
This study was conducted because of the low ability to read the beginning of first grade elementary school SD Swasta Arvena Sei Pejangki. Of the 47 students who received a lower category there are 35 students (74.46%), moderate category there are 11 students (23.40%) and high category 1 students (2.12%) with an average value of 49.47. The purpose of this study to improve students' reading abili…
This study was motivated by the low learning outcomes IPA fourth grade students of SD Negeri 16 Bandar Jaya, totaling 16 students with KKM 70 just 6 students, or 37.5% of the children who completed while 10 students or 62.5% were completed. According to this problem, the researchers have conducted research using Action Research (PTK) by applying Cooperative Learning Model two stay two stray. In…
ABSTRACT Bamboo betung (Dendrocalamus asper) is one of the plant types found in Buruk Bakul village where located in Bukit Batu Bengkalis. The aim of this study was to analyze of the potential of charcoal from bamboo betung as adsorben. In this research, charcoal was made by doing carbonization of bamboo betung at 500oC for an hour and then was re-carbonize for 60 and 30 minutes. The resul…
Problems were found in the learning process which is an obstacle for this is the low social studies learning outcomes which have not yet reached KKM (minimum completeness criteria) as determined by the school is 64. It can be seen from the data of daily tests of class III Elementary School 001 Kampar Timur learning IPS with an average value of 62.82, the lowest score is 64 and the highest …
ABSTRACT The magnetic degree and susceptibility of sand and dust along main roads in Pekanbaru, such as Arifin Ahmad, Imam Munandar, Naga Sakti, Soebrantas, Sudirman and Tuanku Tambusai has been determined. The mass of samples taken for each location was 8 kg. The iron contained of the sample was separated from sand and dust using iron sand separator. The method used in this study was the expe…
The purpose of this study was to determine whether the implementation of Problem Based Learning model to improve students’ achievement in the subject of Science fourt year students of state elementary school 007 Rumbio Jaya. Formulation of the problem in this study is whether the implementation of Problem Based learning model improve students’ achievement in the subject of Science fourt yea…
SUMMARY Watermelon (Citrullus vulgaris) is a fruit that contains a lot of nutrients such as protein, fat, vitamin A, vitamin B, vitamin C, iron, phosphorus and some amino acids that are beneficial for health. Watermelon tend to be consumed at the flesh of the fruit, while the white or skin thrown away so it is necessary to use the fruit skin. The purpose of this research is knowing antimicrobi…
The problem of this research is the weakness of student’s learning result of mathematics subject. It show from 30 student’s, 18 students (60%) have lower score, and it is only 12 student’s (40%) have average score 65. The KKM of this school is 70. According to that problem, the research by implementing Classroom Action Research method (CAR) with implementation indonesian realistic mathema…