The aim of this study was to determine the ability performance of FKIP Unimal chemical education students by the using of practicum performance appraisal with self assessment techniques as well as knowing the response of students related to practical performance assessment with self assessment techniques. Self assessment is an assessment of self competence. This study was motivated by the fact that the assessment carried out in practicum activities was still centered on the lecturer and only limited to knowledge that had not been assessed by performance and did not involve students as subjects but only objects of assessment. Type of this study is descriptive qualitative. This study was conducted to describe the findings of the use of performance assessment with self assessment techniques in chemical practicum. The study was carried out at the FKIP Unimal chemical education department for students who took 23 basic chemistry labs. The result was obtained from the instrument of performance appraisal sheets and questionnaire sheets for student responses. Data analysis on the ability of practicum performance and student response of self assessment was analyzed by using percentage techniques. Based on the results of the study showed that the ability of student practicum performance by the assessment of self assessment techniques consisted of very high was about 13.04%; high was about 47.83%; and sufficient was about 39.13%. The student responses to the using of performance appraisal with self assessment techniques showed the results that most students agreed and felt happy with the self-assessment. The conclusion of this study was the students were able to assess performance with self assessment techniques and provide a positive response related to the performance assessment with self assessment techniques.
{"title":"EVALUASI KINERJA PRAKTIKUM TITRASI ASAM BASA DENGAN TEKNIK SELF ASSESMENT MAHASISWA FKIP UNIMAL","authors":"Hayatuz Zakiyah","doi":"10.22373/lj.v6i2.3679","DOIUrl":"https://doi.org/10.22373/lj.v6i2.3679","url":null,"abstract":"The aim of this study was to determine the ability performance of FKIP Unimal chemical education students by the using of practicum performance appraisal with self assessment techniques as well as knowing the response of students related to practical performance assessment with self assessment techniques. Self assessment is an assessment of self competence. This study was motivated by the fact that the assessment carried out in practicum activities was still centered on the lecturer and only limited to knowledge that had not been assessed by performance and did not involve students as subjects but only objects of assessment. Type of this study is descriptive qualitative. This study was conducted to describe the findings of the use of performance assessment with self assessment techniques in chemical practicum. The study was carried out at the FKIP Unimal chemical education department for students who took 23 basic chemistry labs. The result was obtained from the instrument of performance appraisal sheets and questionnaire sheets for student responses. Data analysis on the ability of practicum performance and student response of self assessment was analyzed by using percentage techniques. Based on the results of the study showed that the ability of student practicum performance by the assessment of self assessment techniques consisted of very high was about 13.04%; high was about 47.83%; and sufficient was about 39.13%. The student responses to the using of performance appraisal with self assessment techniques showed the results that most students agreed and felt happy with the self-assessment. The conclusion of this study was the students were able to assess performance with self assessment techniques and provide a positive response related to the performance assessment with self assessment techniques.","PeriodicalId":33707,"journal":{"name":"Lantanida Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48111434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In addition of being dubbed as the city of "Serambi Mekah", Aceh is also famous as the city of "Thousand Coffee Shops". One of coffee dish that attracts consumers' is khop coffee (read: kopi khop) because it is served with a glass dish upside down. The khop coffee, a typical coffee drink from Meulaboh, West Aceh Regency, is served by reversing the glass that has been filled with coarse coffee powder on top of the pan. Therefore, it is deemed necessary to conduct a special study on the analysis of unique taste-determining compounds in khop coffee to elevate the local wisdom of the Acehnese to the scientific region. The aim of this study was to determine the concentration of caffeine compounds of khop coffee due to the modification of coffee powder diameter by using the thin layer chromatography (TLC) method and UV-Vis spectrophotometry. This study used four types of samples with diameter variations coffee, namely original, fine, medium, and coarse. The four samples were extracted with boiling hot water according to the same conditions when the bartender served it (90 °C) followed by liquid-liquid extraction using chloroform solvent. Dry extract was analyzed by using TLC followed by a UV-Vis spectrometer. The results showed that the concentrations of original, fine, medium, and coarse coffee were respectively 57.85%; 17.61%; 1.29%; and 0.83%.
{"title":"ANALISIS KADAR KAFEIN DALAM MINUMAN KOPI KHOP ACEH DENGAN METODE SPEKTROSKOPIK","authors":"Sabarni Sabarni, N. Nurhayati","doi":"10.22373/LJ.V6I2.3624","DOIUrl":"https://doi.org/10.22373/LJ.V6I2.3624","url":null,"abstract":"In addition of being dubbed as the city of \"Serambi Mekah\", Aceh is also famous as the city of \"Thousand Coffee Shops\". One of coffee dish that attracts consumers' is khop coffee (read: kopi khop) because it is served with a glass dish upside down. The khop coffee, a typical coffee drink from Meulaboh, West Aceh Regency, is served by reversing the glass that has been filled with coarse coffee powder on top of the pan. Therefore, it is deemed necessary to conduct a special study on the analysis of unique taste-determining compounds in khop coffee to elevate the local wisdom of the Acehnese to the scientific region. The aim of this study was to determine the concentration of caffeine compounds of khop coffee due to the modification of coffee powder diameter by using the thin layer chromatography (TLC) method and UV-Vis spectrophotometry. This study used four types of samples with diameter variations coffee, namely original, fine, medium, and coarse. The four samples were extracted with boiling hot water according to the same conditions when the bartender served it (90 °C) followed by liquid-liquid extraction using chloroform solvent. Dry extract was analyzed by using TLC followed by a UV-Vis spectrometer. The results showed that the concentrations of original, fine, medium, and coarse coffee were respectively 57.85%; 17.61%; 1.29%; and 0.83%.","PeriodicalId":33707,"journal":{"name":"Lantanida Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48248792","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Cosmetics is products used to enhance the appearance of face. Various kinds of cosmetic products are increasingly emerging at this time. One kind of cosmetic is whitening cream. The whitening cream contains of an active substance used to tint black spots on the skin. The active substance which often used in cosmetics is hydroquinone. Hydroquinone is a class of hard drugs whose use must be based on a doctor's prescription. The use of hydroquinone is prohibited on cosmetic preparations that are sold freely, but may be used if under the supervision of a physician 2% (BPOM, 2007). The aim of this study was to determine the existence and level of hydroquinone in whitening cream. The results of the analysis showed that samples A, B, C, D, E, F, H and I were positive for hydroquinone with percentage of hydroquinone was about 0.000168%, 0.000319%, 0.000309%, 0.001188%, 0.00392%, 0.000058%, 0.000521%, 0.000899%, whereas the G sample was not detected.
{"title":"ANALISA HIDROKUINON DALAM KRIM DOKTER SECARA SPEKTROFOTOMETRI UV-VIS","authors":"Azmalina Adriani, Rifa Safira","doi":"10.22373/LJ.V6I2.3517","DOIUrl":"https://doi.org/10.22373/LJ.V6I2.3517","url":null,"abstract":"Cosmetics is products used to enhance the appearance of face. Various kinds of cosmetic products are increasingly emerging at this time. One kind of cosmetic is whitening cream. The whitening cream contains of an active substance used to tint black spots on the skin. The active substance which often used in cosmetics is hydroquinone. Hydroquinone is a class of hard drugs whose use must be based on a doctor's prescription. The use of hydroquinone is prohibited on cosmetic preparations that are sold freely, but may be used if under the supervision of a physician 2% (BPOM, 2007). The aim of this study was to determine the existence and level of hydroquinone in whitening cream. The results of the analysis showed that samples A, B, C, D, E, F, H and I were positive for hydroquinone with percentage of hydroquinone was about 0.000168%, 0.000319%, 0.000309%, 0.001188%, 0.00392%, 0.000058%, 0.000521%, 0.000899%, whereas the G sample was not detected.","PeriodicalId":33707,"journal":{"name":"Lantanida Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44574178","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The aim of this study was to improve the learning outcomes and the student activity in the learning process of Chemistry in SMAN 1 Indrapuri of XI IPA 1 class. The solution to improve the student achievement was by the application of peer tutoring methods. This research was conducted in two cycles of 23 students. The technique of collecting data was conducted by the observation of teachers and collaborators. The KKM value of Chemistry lessons in this school is 65. Based on the results of the Cycle I was obtained around 65.21% passed the KKM with an average value of 61.3. The results of the cycle II showed the learning completeness as much as 100% with an average value of 72.4. This showed that the method of peer tutoring is successful in improving student learning outcomes. The student activity also increases with the presence of peer tutors. This showed that the use of peer tutors can improve student activity and student learning outcomes.
{"title":"IMPLEMENTASI METODE TUTOR SEBAYA DAPAT MENINGKATKAN AKTIVITAS DAN HASIL BELAJAR SISWA PADA PELAJARAN KIMIA MATERI TERMOKMIA DIKELAS XI IPA 1 SMA NEGERI 1 INDRAPURI SEMESTER GANJIL TAHUN PELAJARAN 2018/2019","authors":"S. Suryati","doi":"10.22373/lj.v6i2.4051","DOIUrl":"https://doi.org/10.22373/lj.v6i2.4051","url":null,"abstract":"The aim of this study was to improve the learning outcomes and the student activity in the learning process of Chemistry in SMAN 1 Indrapuri of XI IPA 1 class. The solution to improve the student achievement was by the application of peer tutoring methods. This research was conducted in two cycles of 23 students. The technique of collecting data was conducted by the observation of teachers and collaborators. The KKM value of Chemistry lessons in this school is 65. Based on the results of the Cycle I was obtained around 65.21% passed the KKM with an average value of 61.3. The results of the cycle II showed the learning completeness as much as 100% with an average value of 72.4. This showed that the method of peer tutoring is successful in improving student learning outcomes. The student activity also increases with the presence of peer tutors. This showed that the use of peer tutors can improve student activity and student learning outcomes.","PeriodicalId":33707,"journal":{"name":"Lantanida Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47833466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The study about antioxidant activity test of coffee parasite leaves (Loranthus ferrugineus Roxb.) by 1,1-diphenyl-2-pikrilhidrazyl (DPPH) method has been done. The aim of this study was to determine the content and activity of secondary metabolites, flavonoids and antioxidant, which found in the coffee parasite leaves. Dry powder of parasite coffee leaves (Loranthus ferrugineus Roxb.) as much as 0.5 kg were macerated by 2 L of ethanol solvent at room temperature for 4 x 24 hours, then mixed and filtered. Ethanol filtrate was evaporated at 30-40°C by using a rotary evaporator to obtain the crude extract of coffee parasite leaves. The results of the phytochemical screening showed positively that the extract was containing alkaloid, flavonoids, saponins, tannins and steroid compounds.The results of the antioxidant activity test by using DPPH method was obtained that the amount of antioxidant activity of the samples of ethanol extract had a very strong antioxidant activity against radical DPPH 0.05 mM, with IC50 values was obtained 6.063 ppm. Whereas, for comparison of ascorbic acid was about 3.127 ppm.
{"title":"UJI AKTIVITAS ANTIOKSIDAN DAUN BENALU KOPI (Loranthus Ferrugineus Roxb.) DENGAN METODE DPPH (1,1 – Difenil -2- Pikrilhidrazil)","authors":"Mu YuLian, Safrijal Safrijal","doi":"10.22373/lj.v6i2.4127","DOIUrl":"https://doi.org/10.22373/lj.v6i2.4127","url":null,"abstract":"The study about antioxidant activity test of coffee parasite leaves (Loranthus ferrugineus Roxb.) by 1,1-diphenyl-2-pikrilhidrazyl (DPPH) method has been done. The aim of this study was to determine the content and activity of secondary metabolites, flavonoids and antioxidant, which found in the coffee parasite leaves. Dry powder of parasite coffee leaves (Loranthus ferrugineus Roxb.) as much as 0.5 kg were macerated by 2 L of ethanol solvent at room temperature for 4 x 24 hours, then mixed and filtered. Ethanol filtrate was evaporated at 30-40°C by using a rotary evaporator to obtain the crude extract of coffee parasite leaves. The results of the phytochemical screening showed positively that the extract was containing alkaloid, flavonoids, saponins, tannins and steroid compounds.The results of the antioxidant activity test by using DPPH method was obtained that the amount of antioxidant activity of the samples of ethanol extract had a very strong antioxidant activity against radical DPPH 0.05 mM, with IC50 values was obtained 6.063 ppm. Whereas, for comparison of ascorbic acid was about 3.127 ppm.","PeriodicalId":33707,"journal":{"name":"Lantanida Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48784426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In the learning process, most students have difficulties to understand the chemistry subject that delivered by the teacher. One thing that caused the difficulties of student learning was the minimum used of an appropriate learning model by the the teacher. This study was conducted to know the influence of Two Stay Two Stray learning model towards the improving of student learning result of Oxidation and Reduction Reaction Material, the student activity, and student response towards the study model of Two Stay Two Stray in SMA Bina Bangsa. The sample in this research was the students in class X of SMA Bina Bangsa. This research used the quantitative approach with a design research of Pre-Eksperimen. Data collection was done by multiple choice test, observation and student response questionnaire. The result showed that there was an increasing in student learning that taught by using learning model of Two Stay Two Stray at the test of normality with a significant level X2 count < X2 table or 1.467 < 11,1 states that the test has a normal distribution, whereas the t test with significance level of Tcount > Ttable or 8.251 > 2.13 that states there was an influence towards the students study research by using the Two Stay Two Stray model, while by n-Gain test the average students reaches the high criteria. The observation result of student activity has increased from 79.14% at the 1st meeting to become 88.33% at the 2nd meeting, the students also have a positive response towards the application of Two Stay Two Stray model study on Oxidation and Reduction Reaction material, with the student response percentage of “Yes†was 84% which means the students were interested with the Two Stay Two Stray model study.
在学习过程中，大部分学生对老师讲授的化学课有理解困难。造成学生学习困难的一件事是老师很少使用适当的学习模式。本研究旨在了解两待两散学习模式对SMA Bina Bangsa学生氧化还原反应材料学习效果的提高、学生的积极性以及学生对两待两散学习模式的反应的影响。本研究的样本为SMA Bina Bangsa X班的学生。本研究采用定量方法，对实验前期进行设计研究。数据收集采用多项选择测验、观察法和学生回答问卷法。结果表明,学生的学习,有越来越教通过学习模式两个呆两个流浪的正态性检验和显著水平X2计数< X2表或1.467 < 11日1的测试有一个正态分布,而t检验的显著性水平Tcount > Ttable或8.251 > 2.13,有一个对学生学习的影响的研究通过使用两个呆两个流浪模型,而通过n-Gain测试，平均学生达到了高标准。学生活动的观察结果从第一次会议的79.14%上升到第二次会议的88.33%，学生对氧化还原反应材料的Two Stay Two Stray模型研究的应用也有积极的反应，学生的反应百分比为€œYes—为84%，说明学生对Two Stay Two Stray模型研究很感兴趣。
{"title":"PENGARUH MODEL PEMBELAJARAN TWO STAY TWO STRAY TERHADAP HASIL BELAJAR SISWA PADA MATERI REAKSI OKSIDASI DAN REDUKSI DI SMA BINA BANGSA ACEH BESAR","authors":"Teuku Badlisyah","doi":"10.22373/LJ.V6I1.3216","DOIUrl":"https://doi.org/10.22373/LJ.V6I1.3216","url":null,"abstract":"In the learning process, most students have difficulties to understand the chemistry subject that delivered by the teacher. One thing that caused the difficulties of student learning was the minimum used of an appropriate learning model by the the teacher. This study was conducted to know the influence of Two Stay Two Stray learning model towards the improving of student learning result of Oxidation and Reduction Reaction Material, the student activity, and student response towards the study model of Two Stay Two Stray in SMA Bina Bangsa. The sample in this research was the students in class X of SMA Bina Bangsa. This research used the quantitative approach with a design research of Pre-Eksperimen. Data collection was done by multiple choice test, observation and student response questionnaire. The result showed that there was an increasing in student learning that taught by using learning model of Two Stay Two Stray at the test of normality with a significant level X2 count < X2 table or 1.467 < 11,1 states that the test has a normal distribution, whereas the t test with significance level of Tcount > Ttable or 8.251 > 2.13 that states there was an influence towards the students study research by using the Two Stay Two Stray model, while by n-Gain test the average students reaches the high criteria. The observation result of student activity has increased from 79.14% at the 1st meeting to become 88.33% at the 2nd meeting, the students also have a positive response towards the application of Two Stay Two Stray model study on Oxidation and Reduction Reaction material, with the student response percentage of “Yes†was 84% which means the students were interested with the Two Stay Two Stray model study.","PeriodicalId":33707,"journal":{"name":"Lantanida Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45515519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The observations result of the students of SMA Negeri 16 Banda Aceh, showing that the student were less motivated in learning process, they prefer to play and engrossed by their own activities, there were only several students whose really enthusiastic about the material being studied. In order of learning in the classroom went well, so that needs to be innovated the learning activities by using. One of the innovations was used, namely the instructional media, while the learning media that used was the dominoes card and the crossword puzzles. This study aimed to see the effectiveness of learning media on student learning outcomes in learning chemistry by using Dominoes card and crossword puzzle media. This research was the experimental, the research of this research was the student of XI-1 class student experiment class I (dominoes card media) and class XI-2 as experiment class II (crossword puzzle), with total sample was about 37 students. The sample selection based on Purpossive Sampling technique. The instruments used in the form of written tests consist of 20 multiple choice questions with cognitive competence level C1 (knowledge), C2 (understanding), and C3 (application), group worksheet (LKK) in the form of card media and a crossword puzzle, and implementation plan learning (RPP). The data collection techniques were by pretest and posttest, and then analyzed were by using the normality test, homogeneity test, and T test on hypothesis test with 19-version version of the Statistical Program for Social Science (SPSS) program. The results showed that there was no significant difference to the learning outcomes of students who were taught using domino card media and TTS media. It can be concluded that the domino card media and TTS media are very effective in improving the learning outcomes of the students of SMA Negeri 16 Banda Aceh.
SMA Negeri 16 Banda Aceh的学生的观察结果表明，学生在学习过程中的积极性较低，他们更喜欢玩耍并专注于自己的活动，只有几个学生真正对所学材料充满热情。课堂上的学习秩序进行得很好，因此需要通过使用来创新学习活动。其中一个创新被使用，即教学媒体，而使用的学习媒体是多米诺骨牌和填字游戏。本研究旨在通过使用多米诺骨牌和填字游戏媒体来观察学习媒体对学生化学学习结果的有效性。本研究为实验，研究对象为XI-1班学生实验一班（多米诺牌媒体）和XI-2班学生实验二班（填字游戏），总样本约为37名学生。基于Purposive采样技术的样本选择。书面测试中使用的工具包括20个认知能力等级为C1（知识）、C2（理解）和C3（应用）的选择题，卡片媒体和填字游戏形式的小组工作表（LKK），以及实施计划学习（RPP）。数据收集技术采用前测和后测，然后采用正态性检验、同质性检验和假设检验上的T检验，用19版社会科学统计程序（SPSS）进行分析。结果表明，使用多米诺牌媒体和TTS媒体教学的学生的学习结果没有显著差异。可以得出的结论是，多米诺牌媒体和TTS媒体在提高班达亚齐16号SMA Negeri学生的学习成绩方面非常有效。
{"title":"EFEKTIVITAS MEDIA PEMBELAJARAN TERHADAP HASIL BELAJAR KIMIA SISWA SMA NEGERI 16 BANDA ACEH","authors":"Ainun Mardhiah, Said Ali Akbar","doi":"10.22373/LJ.V6I1.3173","DOIUrl":"https://doi.org/10.22373/LJ.V6I1.3173","url":null,"abstract":"The observations result of the students of SMA Negeri 16 Banda Aceh, showing that the student were less motivated in learning process, they prefer to play and engrossed by their own activities, there were only several students whose really enthusiastic about the material being studied. In order of learning in the classroom went well, so that needs to be innovated the learning activities by using. One of the innovations was used, namely the instructional media, while the learning media that used was the dominoes card and the crossword puzzles. This study aimed to see the effectiveness of learning media on student learning outcomes in learning chemistry by using Dominoes card and crossword puzzle media. This research was the experimental, the research of this research was the student of XI-1 class student experiment class I (dominoes card media) and class XI-2 as experiment class II (crossword puzzle), with total sample was about 37 students. The sample selection based on Purpossive Sampling technique. The instruments used in the form of written tests consist of 20 multiple choice questions with cognitive competence level C1 (knowledge), C2 (understanding), and C3 (application), group worksheet (LKK) in the form of card media and a crossword puzzle, and implementation plan learning (RPP). The data collection techniques were by pretest and posttest, and then analyzed were by using the normality test, homogeneity test, and T test on hypothesis test with 19-version version of the Statistical Program for Social Science (SPSS) program. The results showed that there was no significant difference to the learning outcomes of students who were taught using domino card media and TTS media. It can be concluded that the domino card media and TTS media are very effective in improving the learning outcomes of the students of SMA Negeri 16 Banda Aceh.","PeriodicalId":33707,"journal":{"name":"Lantanida Journal","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43312641","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The aim of this research was to increase the entrepreneurship interest and student learning result of chemistry learning process, The innovation and renewal in Chemo-Entrepreneurship (CEP) approach which is related to real objects (contextual) were needed so that the children were motivated and interested to learn chemistry. This research was implemented by IPA-2 students of SMAN I Bukit school that Bener Meriah District. The sample of this research was about 25 students. The research design used was the Class Action Research (PTK) which consists of planning, action, observation and reflection. Data collection techniques in this study were obtained by observation, pre test, post test, and questionnaire. The result of this research for the students' learning outcomes in the 1st cycle was showing that the student learning completeness about 36% with an average value about 63.77%, and in the 2nd cycle was obtained about being 84% complete value with an average value about 82.7%. Based on the result showing that the success of students increased in the 2nd cycle and student responses positively about 83.2%. The interest of the students of entrepreneurship interest was increased from 20% in 1st cycle to 47% in 2nd cycle and it turned out students who stated positively about 83.2% the student interest increased from I to cycle II i.e. 20% to 70%. Based on the results of this study can be concluded that the interest and learning outcomes were increased by the influence of CEP approaches.
本研究的目的是提高学生在化学学习过程中的创业兴趣和学习效果，需要与实物（情境）相关的化学创业（CEP）方法的创新和更新，以使孩子们有动力和兴趣学习化学。这项研究由Bener Meriah区SMAN I Bukit学校的IPA-2学生实施。这项研究的样本是大约25名学生。所采用的研究设计是集体行动研究（PTK），包括计划、行动、观察和反思。本研究中的数据收集技术通过观察、测试前、测试后和问卷调查获得。本研究对第一周期学生的学习成果进行了研究，结果表明，学生的学习完整性约为36%，结果表明，学生的成功率在第二周期有所提高，学生的积极反应约为83.2%。创业兴趣学生的兴趣从第一周期的20%提高到第二周期的47%83.2%的学生兴趣从第一周期增加到第二周期，即20%到70%。根据这项研究的结果可以得出结论，CEP方法的影响提高了学生的兴趣和学习成果。
{"title":"PENGARUH PENDEKATAN CHEMO-ENTREPRENEURSHIP ( CEP) TERHADAP MINAT DAN HASIL BELAJAR SISWA SMA N 1 BUKIT KABUPATEN BENER MERIAH PADA MATERI PERUBAHAN MATERI","authors":"Sri Ismulyati, Yudi Ikhwani","doi":"10.22373/LJ.V6I1.3156","DOIUrl":"https://doi.org/10.22373/LJ.V6I1.3156","url":null,"abstract":"The aim of this research was to increase the entrepreneurship interest and student learning result of chemistry learning process, The innovation and renewal in Chemo-Entrepreneurship (CEP) approach which is related to real objects (contextual) were needed so that the children were motivated and interested to learn chemistry. This research was implemented by IPA-2 students of SMAN I Bukit school that Bener Meriah District. The sample of this research was about 25 students. The research design used was the Class Action Research (PTK) which consists of planning, action, observation and reflection. Data collection techniques in this study were obtained by observation, pre test, post test, and questionnaire. The result of this research for the students' learning outcomes in the 1st cycle was showing that the student learning completeness about 36% with an average value about 63.77%, and in the 2nd cycle was obtained about being 84% complete value with an average value about 82.7%. Based on the result showing that the success of students increased in the 2nd cycle and student responses positively about 83.2%. The interest of the students of entrepreneurship interest was increased from 20% in 1st cycle to 47% in 2nd cycle and it turned out students who stated positively about 83.2% the student interest increased from I to cycle II i.e. 20% to 70%. Based on the results of this study can be concluded that the interest and learning outcomes were increased by the influence of CEP approaches.","PeriodicalId":33707,"journal":{"name":"Lantanida Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49423243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tea is one of kind drink that most be preferred and consumed the tea community around the world, even most common of the community utilized tea as a healthy drink because it contains antioxidants. Antioxidants can protect cells from damage that caused by the unstable molecules. The determination of tea temperature and optimum time were aimed to know how the influence of the caffeine content of antioxidants, tannin and chatecine. In a flood expected to contain low caffeine levels with high polyphenols.The method in this research was an extraction method that analyzed by using UV-Vis a spectrophotometer. The results showed that the lowest caffeine level was at a temperature 70°C for 15 minutes of 0.51 %, the highest levels of tannin was at the brewing temperature 70°C for 5 minutes of 4.783 %, the highest cetacean levels were at the brewing temperature 85°C for 5 minutes of 1.14 %. So that, the optimum condition was obtained at the brewing temperature70°C for 5 minutes, which have antioxidant activity about 56.75%.
{"title":"PENENTUAN SUHU DAN WAKTU OPTIMUM PENYEDUHAN BATANG TEH HIJAU (Camelia Sinensis L.) TERHADAP KANDUNGAN ANTIOKSIDAN KAFEIN, TANIN DAN KATEKIN","authors":"Nurul Mutmainnah, S. Chadijah, M. Qaddafi","doi":"10.22373/LJ.V6I1.1984","DOIUrl":"https://doi.org/10.22373/LJ.V6I1.1984","url":null,"abstract":"Tea is one of kind drink that most be preferred and consumed the tea community around the world, even most common of the community utilized tea as a healthy drink because it contains antioxidants. Antioxidants can protect cells from damage that caused by the unstable molecules. The determination of tea temperature and optimum time were aimed to know how the influence of the caffeine content of antioxidants, tannin and chatecine. In a flood expected to contain low caffeine levels with high polyphenols.The method in this research was an extraction method that analyzed by using UV-Vis a spectrophotometer. The results showed that the lowest caffeine level was at a temperature 70°C for 15 minutes of 0.51 %, the highest levels of tannin was at the brewing temperature 70°C for 5 minutes of 4.783 %, the highest cetacean levels were at the brewing temperature 85°C for 5 minutes of 1.14 %. So that, the optimum condition was obtained at the brewing temperature70°C for 5 minutes, which have antioxidant activity about 56.75%.","PeriodicalId":33707,"journal":{"name":"Lantanida Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45829574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The aim of this research was: (1) to give the standardization of BSNP information from a chemistry text book of the 2nd semester in class XII that internalized by character value in accordance with the curriculum development of 2013, (2) to see the result of learning and to know the result of students' attitude observation in the learning process. The benefits of this research was the existence of textbooks that fit into BSNP standard has been already good and adding the scientific information. The method used in this research was: Research and Development method by using BSNP Standardization in the chemistry book that validated by chemistry teacher in Langsa city and the application test in book development and doing observation process toward student attitude to learning. Based on the research that has been done, it is found that: (1) the development of textbooks has fulfilled the standard of content feasibility assessment with a score about 4.18, score language about 4.64, presentation of score about 4.6 and graphic book or score about 4.5, so it was valid. (2) the students learning outcomes by using this book book indicate the increasing of students' knowledge from the average score of pretest score of 43.3 to postes of 91.66. (3) The result of the attitude assessment was shown from the observation value to the student discussion attitude with the cooperation was score about 2.4, the curiosity score about 2.8, attitude score about 2.6 and communication score about 3.1. The conclusions of this research, were: (1) the result of the book development has been very feasible to use, (2) the increasing of student learning outcomes equal to 84.78%. (3) There is a change in student character to be better.
{"title":"PENGEMBANGAN BUKU AJAR KIMIA KELAS XII SMA/MA SEMESTER II TERINTERNALISASI NILAI KARAKTER SESUAI DENGAN KURIKULUM 2013","authors":"Ikhwani Ikhwani, I. Maulidi","doi":"10.22373/LJ.V6I1.3123","DOIUrl":"https://doi.org/10.22373/LJ.V6I1.3123","url":null,"abstract":"The aim of this research was: (1) to give the standardization of BSNP information from a chemistry text book of the 2nd semester in class XII that internalized by character value in accordance with the curriculum development of 2013, (2) to see the result of learning and to know the result of students' attitude observation in the learning process. The benefits of this research was the existence of textbooks that fit into BSNP standard has been already good and adding the scientific information. The method used in this research was: Research and Development method by using BSNP Standardization in the chemistry book that validated by chemistry teacher in Langsa city and the application test in book development and doing observation process toward student attitude to learning. Based on the research that has been done, it is found that: (1) the development of textbooks has fulfilled the standard of content feasibility assessment with a score about 4.18, score language about 4.64, presentation of score about 4.6 and graphic book or score about 4.5, so it was valid. (2) the students learning outcomes by using this book book indicate the increasing of students' knowledge from the average score of pretest score of 43.3 to postes of 91.66. (3) The result of the attitude assessment was shown from the observation value to the student discussion attitude with the cooperation was score about 2.4, the curiosity score about 2.8, attitude score about 2.6 and communication score about 3.1. The conclusions of this research, were: (1) the result of the book development has been very feasible to use, (2) the increasing of student learning outcomes equal to 84.78%. (3) There is a change in student character to be better.","PeriodicalId":33707,"journal":{"name":"Lantanida Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44652100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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