THE POTENTIAL USE OF ANTI-NUTRITIONAL COMPOUNDS OF GADUNG TUBERS AS BIOPESTICIDES

The use of gadung (Discorea hispida dennst.) tubers as food source is not seen as an attractive option due to dioscorine and cyanide anti-nutritional compounds contained therein. The presence of dioscorine and cyanide compounds makes gadung tubers known as poisonous food. Although the community has known its poisonous nature, the use of gadung tubers as natural pesticides (biopesticides) is not commonly known by the community. Using gadung tubers as biopesticides provides solution to unanswered problems caused by chemical pesticides. This article seeks to describe the potential use of anti-nutritional compounds of gadung tubers as biopesticides based on literature reviews. Various literature related to anti-nutritional compounds contained in gadung tubers and their use as biopesticides have been analyzed in depth. The literature review results show that dioscorine and cyanide anti-nutritional compounds are toxic and can be used as biopesticides. The effectiveness of gadung tubers on various agricultural pests depends entirely on the concentration of gadung tubers used. The use of gadung tubers as biopesticides is needed to increase and maintain the productivity of agricultural land in addition to preserving natural resources.

THE EFFECT OF ADVERSITY QUOTIENT AND ATTITUDES OF STUDENTS ON THE STUDENT'S PHYSICAL LEARNING ACHIEVEMENTS

This ex post facto study aimed to reveal the influence of adversity quotient and attitudes students on physics learning achievement. The population of this study was all of twelvh graders of Public Senior High School (SMAN) 10 Banjarmasin City. The sample was determined by simple random sampling. The instruments used were questionnaires. The research data were analyzed by using SPSS statistical data processing program. The results showed that adversity quotient and attitudes students were in the very high and positive category, and than had a significant effect on physics learning achievement of Public Senior High School (SMAN) 10 Banjarmasin City.

THE IMPLEMENTATION OF INQUIRY LEARNING ON STUDENTS' LEARNING OUTCOMES AND CRITICAL THINKING SKILLS IN THE DIGESTIVE SYSTEM MATERIAL

This research is aimed to determine the students’ achievement and critical thinking on the digestion system topic. This study was conducted using a quasi-experiment with a control group pre-test and post-test design. Furthermore, the samples were chosen using the purposive sampling technique. The instrument consisted of 20 multiple-choice tests. Findings indicate that the average student achievement is 16.71 in the experiment and 12.92 in the control class. The t-test also can be known as t-count t-table (1.71 1.68), which means a significant difference between experiment average and control average. Based on the test result in the experiment class, it can be assumed that there is an enhancement of the average percentage of students' critical thinking from 63% to 84%. Thus, it can be concluded that inquiry learning model can increase the students’ achievement and critical thinking.