IMPACT : International Journal of Research in Applied, Natural and Social Sciences

1-10

Authors: Rini Perdana & Alimuddin

This research aims to isolate and identify the secondary metabolite compound contained in the n-hexane extract of leaf of Manilkara Zapota. Isolation is done in several stages; extraction, fractionation, purification, and identification. The result was obtained as pure an isolate in white needle crystal with a melting point of 188-190°C. The isolate gives a positive response to Lieberman-Burchard reagent test. Isolate was identified by analyzing the infrared spectrum which showed the wave number (cm-1) are: 1026,13 (CO); 1458.18 and 1367.53 (CH2 and CH3); 1647,21 (C = C); 2947,23 (C-H); 3442,94 (OH alcohol). Base on reagent test and FTIR data, it is suggested, that isolate is terpenoid compound.

19-24

Authors: Nurhayati & Dian Angriani

This research aims to know the effectiveness of using drill method withon students learning outcomes. The research design used was one – group pretest – -posttest design. Participants in this study were 30 students in class XII science in South Sulawesi, Indonesia. The sampling technique was simple random sampling. Instruments used was essay consisted of seven questions. Data analysis in this research was done by using descriptive statistical analysis and inferential analysis. Descriptive statistical was used to analyze the data of students learning outcomes and the effectiveness of the learning. Inferential analysis was performed using SPSS Statistics 20 for windows program. Normality testing was performed using Kolmogorov-Smirnov test. The result showed that the use of with drill methods is effective in improving students learning outcomes of class XI science

31-42

Authors: Siti Maimunah

As a practitioner in the educational field, having a deep understanding of in assessment principles for mathematics teacher is a must. Their perceptions toward assessment principles and its applicability can influence the way they teach.The purpose of this study wasere to investigate their perceptions toward assessment principles and their tendency in choosing assessment instruments. In this case study, the subject involved where one high school teacher and one secondary school teacher. Major methods in this study were deep interview and classroom observations. The assessment principles used was adaopted from Manitoba Education and Training. Results Showed that even though teacher understand the assessment principles and its importance well, the implementation and applicationbility in real classroom learning were as still inconsistently applied. The tendency in using tools of the traditional assessment instrument that only assess student’s cognitive rather than their eaffective and skill was still high. The difficulties and influence factors of the implementation were also revealed. Some practical suggestions on how to apply the principles in mathematics learning wereas presented in this study as the recommendation

51-58

Authors: Muhammad Ikhsan Sukaria

Science learning strategy refers to process standards and content that conforms to the nature of science learning as a product and process. The use of content and process standards include the scope of materials and competencies to be achieved. IPA concepts are a unified whole whose teaching cannot be separated so that the design of learning must be designed in an integrated way. While the standard of content concerning the scope of the material on the curriculum is set not in a logical sequence so as to make it difficult for students to organize their cognitive structure in understanding the concept of science. Therefore, it is deemed necessary to attempt to rearrange the organizational structure of the material so that science learning can be presented in an integrated form. The rearrangement of the material structure can be done by applying an integrated IPA study with the sequenced model. The rearrangement of material structures with sequenced models puts the concept of preconditions preceding the main concepts, the basic concepts preceding the application of concepts, and the general concept of preceding specific concepts. The structure of the material in a logical sequence of integrated IPA learning sequenced models fits perfectly with the scientific and conceptual approach. The science lessons with these two approaches are accommodated by guided learning model of guilt and creative problem-solving. The effectiveness of the application of these two learning models is strongly influenced by the method used. Both of these learning models stimulate students' curiosity so that question and answer methods and demonstrations can assist in streamlining the implementation of both learning models.

67-70

Authors: Shridevi. H & Somanath Reddy. C. Patil

The present study is to examine the heavy metal contents in gugal bridge/barrage across river Krishna of deodurga taluk of Raichur district. The study was undertaken for a period of one year Dec-2016 to Dec-2017.

77-90

Authors: Asma Ali Mohammed Abushweka

A 32 day trial with Genetically Male Tilapia (Oreochromis niloticus) was conducted to evaluate several commercially available ingredients polymeal, concentrated peaseed meal, and Marine Protein Substitution (MPS) as alternative protein sources instead of fishmeal. Four experimental diets were formulated to contain the same levels of protein (40%) and lipid (10%) and each ingredient was the only protein source. The feeds were fed to triplicate groups of tilapia fingerlings of initially 5.7g. During the course of the trial, tilapias were fed manually to apparent satiation up to four times daily. The highest feed intake and growth performance of tilapia were obtained with tilapia fed the fishmeal, followed by the group fed polymeal and MPS where both diets achieved the same results regarding feed intake and growth rates. However, the lowest feed intake and growth rate were found in tilapia fed the peaseed meal concentrate. The other observation from the present study is fishmeal, polymeal and MPS meal had almost the same Food Conversion Ratio (FCR) that ranged between1.22 and 1.25. Tilapia fed the peaseed meal on the other hand had the best FCR of 0.86 and the highest protein efficiency ratio of 38.5%. This suggests, peaseed meal as a protein source was used effectively by tilapia, however, feed consumption was low and thus the overall growth. Therefore, it can be concluded that fishmeal could be replaced by polymeal or MPS meal without adverse effects, however, the low palatability of peaseed meal would require an additional attractant in the feed.

99-110

Authors: Aida , Wira Bahari Nurdin & Eko Juarlin

Along with technological developments, the study of magnetic nanoparticles was a concern to scientists and engineers. One of the most widely synthesized types of nanoparticles was the nanoparticles used in medicine because it had magnetic properties, which were properties that could be drawn by the magnetic field and it was this character that useful for human life in various fields. The research for solves differential equations by using Euler method with Matlab simulation program to simulate the movement of drugs human body. From the simulation, we have the results of the data that shows the velocity of drug particles depends on time due to the influence of a strong magnetic field. The duration takes for the particles to find the magnetic field is 40 seconds. We divide final position of the particle distribution with 20 classes. Distribution of particles in the interval -0,3 to -0,1 have the smallest percentage of the particle distribution is 0,3% and the particles in the interval of 0,6 to 0,8 have the largest percentage is 2,2%. By using the exponential function approach to predict the average velocity it is concluded that the function f(t) = A exp (-kt), with the value of function A = 1 and k = 0,8 the closest.

117-126

Authors: Andi Amalia Wildani , Hanny Handiyani & Cori Tri Suryani

The development of formal education is one type of continuing professional development in Nursing. A Nurse Manager should have an educational development plan as an effort to align the achievement of quality health services. Nurse Manager in the one of the National General Hospital in Jakarta has a nurse formal education development planning that has been made by the Nurse Manager, but not become an optimal yet. The method used pilot study to optimize the function of Nurse Manager planning in developing nurse formal education with situation analysis using fish bone diagram, making Plan of Action (POA), implementation, and evaluation. The results of the assessment indicate the main problem that occurs is not optimal the function of Nurse Manager planning in the development of nurse formal education. The problem was solved using the Kurt Lewin planned change and Plan-Do-Check-Act (PDCA) approach. Implementation is the draft of guidelines for planning in the nurse formal education development and socialization of draft of guidelines with brainstorming. Implementation made resulted in guidelines for planning in nurse formal education development and interests and positive responses from participants who attended. The recommendations are the proposed draft of guidelines for planning in nurse formal education development that has been compiled should be coordinated with the Medic and Nursing Directorate, Human Resources and Education Directorate, and Financial Directorate, should be approved by the President Director of the hospital, should be socialized, monitoring and evaluation of planning in nurse formal education development, a budget plan should be developed for the development of formal education, and it is expected that the hospital no longer receives a Nurse Diploma.