Combining,, cultural-historical theory＇ of human development with research pinpointing education inhibitors, a survey was developed to investigate how journalism teachers evaluated the effects of five education inhib...Combining,, cultural-historical theory＇ of human development with research pinpointing education inhibitors, a survey was developed to investigate how journalism teachers evaluated the effects of five education inhibitors on their students＇ learning. The list of inhibitors included electronic gadgets, lack of nutrition, parental education levels, family support levels, and racial subcultures. Results showed that use of electronic gadgets and lack of parental edxlcation were perceived as having the most negative influence on learning, while students＂ subcultures were perceived as having the smallest effect. Respondents also knew the least about their students＇ nutritional intake. Further, school size and student socio-economic status seem to play some role in teacher awareness of education inhibitors, and this is an important finding. It shows that while increasing teacher awareness of various education inhibitors, demographic factors also must be considered when targeting specific inhibitors.展开更多
The aim of this research is to study the floatation deinking abilities of black mold enzyme and chemicals in newsprint paper application. In this experiment, the properties of deinked pulp from three different additiv...The aim of this research is to study the floatation deinking abilities of black mold enzyme and chemicals in newsprint paper application. In this experiment, the properties of deinked pulp from three different additives--chemicals, black mold enzyme, and chemicals together with black mold enzyme, are studied. The first part of the experiment was to find the optimal amount of chemicals and the optimal pH through the use of sodium hydroxide and surfactant. As a result, 0.2% of sodium hydroxide and 0.4% of surfactant on oven dried weight at pH 9 was found to be the optimal condition for the deinked pulp to yield the lowest ERIC （effective residual concentration） and the highest brightness. The second part of the experiment was to find the optimal amount of black mold enzyme used in the deinking process. As a result, the optimal condition for deinked pulp to retain the lowest ERIC and the highest brightness was 100 ppm of black mold enzyme and 10 minutes of enzyme reaction time. The third part of experiment was to study the de-inking ability of black mold enzyme and chemicals. Consequently, with 30 min of chemicals reaction time and 60 min of black mold reaction time, the deinked pulp retained low ERIC but higher brightness.展开更多
文摘Combining,, cultural-historical theory＇ of human development with research pinpointing education inhibitors, a survey was developed to investigate how journalism teachers evaluated the effects of five education inhibitors on their students＇ learning. The list of inhibitors included electronic gadgets, lack of nutrition, parental education levels, family support levels, and racial subcultures. Results showed that use of electronic gadgets and lack of parental edxlcation were perceived as having the most negative influence on learning, while students＂ subcultures were perceived as having the smallest effect. Respondents also knew the least about their students＇ nutritional intake. Further, school size and student socio-economic status seem to play some role in teacher awareness of education inhibitors, and this is an important finding. It shows that while increasing teacher awareness of various education inhibitors, demographic factors also must be considered when targeting specific inhibitors.
文摘The aim of this research is to study the floatation deinking abilities of black mold enzyme and chemicals in newsprint paper application. In this experiment, the properties of deinked pulp from three different additives--chemicals, black mold enzyme, and chemicals together with black mold enzyme, are studied. The first part of the experiment was to find the optimal amount of chemicals and the optimal pH through the use of sodium hydroxide and surfactant. As a result, 0.2% of sodium hydroxide and 0.4% of surfactant on oven dried weight at pH 9 was found to be the optimal condition for the deinked pulp to yield the lowest ERIC （effective residual concentration） and the highest brightness. The second part of the experiment was to find the optimal amount of black mold enzyme used in the deinking process. As a result, the optimal condition for deinked pulp to retain the lowest ERIC and the highest brightness was 100 ppm of black mold enzyme and 10 minutes of enzyme reaction time. The third part of experiment was to study the de-inking ability of black mold enzyme and chemicals. Consequently, with 30 min of chemicals reaction time and 60 min of black mold reaction time, the deinked pulp retained low ERIC but higher brightness.
