Kulit pisang merupakan bahan buangan (limbah buah pisang) yang banyak jumlahnya. Beberapa penelitian telah mengungkap manfaat kulit pisang kepok. Berdasarkan kajian tentang pemanfaatan kulit pisang kepok yang telah dilakukan sebelumnya, penelitian ini bertujuan untuk mengetahui kandungan kimia yang ada pada kulit pisang kapok sebagai bahan pestisida nabati menekan serangan serangga hama tanaman umur pendek. Sampel pada penelitian ini adalah kulit pisang kepok yang terbengkalai. Sampel selanjutnya dikeringkan dan dibuat menjadi serbuk kasar. Sampel dimaserasi selama 72 jam menggunakan pelarut etanol 96%. Kemudian dilakukan uji fitokimia untuk mengetahui adanya flavonoid, alkaloid, steroid, tanin, saponin dan triterpenoid. Hasil uji fitokimia kulit pisang kapok menunjukkan adanya kandungan bahan aktif flavonoid, alkaloid, tanin, saponin dan triterpenoid. Kandungan bahan aktif yang terdapat pada kulit pisang kapok tersebut memiliki potensi sebagai bahan alam pestisida nabati karena dapat mempengaruhi serangga hama tanaman umur pendek.

The 21st-century biology learning requires technology-based learning which is potential in improving students’ learning outcomes. This research aimed to examine the validity and effectiveness of web-based learning media on Archaebacteria and Eubacteria on learning process. This web-based learning media was structured by using 4-D Thiagarajan model. The research was conducted at three SSHSs of Samarinda. The data were obtained from validators’ (media expert, material expert, and linguist), teachers’, and students’ opinion by using questionnaire; while the effectiveness was determined based on students’ test score and their response. The results showed that the web-based learning media was very valid with the average score from experts as high as 95.27%. Moreover, this media has been proven to improve the student’s cognitive learning outcomes (gain score 0.39) and well responded by both teachers and students.

Penelitian ini bertujuan untuk mengetahui pengaruh kombinasi ekstrak daun tapak dara dan daun jambu air Semarang terhadap intensitas serangan serangga hama pada tanaman kacang panjang. Jenis penelitian ini adalah penelitian eksperimen yang dilaksanakan di lahan pertanian Kampung Sei. Fatimah, Kecamatan Nunukan, Kabupaten Nunukan, Kalimantan Utara. Menggunakan rancangan acak kelompok (RAK) dengan 5 perlakuan yaitu T0 (kontrol), T1 (25%) , T2 (40%), T3 (55%) dan T4 (70%) dengan 5 ulangan. Hasil analisis data memberikan hasil 168.12 > Ftabel taraf signifikan 1 % (4.77). Berdasarkan analisis data terdapat pengaruh sangat nyata pada pemberian kombinasi ekstrak daun tapak dara dan daun jambu air Semarang terhadap intensitas serangan serangga hama pada tanaman kacang panjang.

A survey has been conducted in grade XI natural science of senior high school, at odd semester, academic year 2016/2017 in Samarinda, Indonesia. The focus of this research are to determine the students' ethnicities, and the responses of biology teachers about students' critical thinking skills, and Problem-Based Learning. Sampling technique was total sampling. The research instrument was a questionnaire. Data was analysed by techniques used descriptive. The results of the data analysis show that the compositions of students' ethnics are: Java (12.7%), Bugis (6.9%), Kutai (13.3%), Banjar (13.3%), and other ethnics (28.5%). Most of the teachers (86.0%) who already understood about the learning approaches, said that they already understood, while the remaining 14% did not understand the patterns of Problem-Based Learning. In addition, 23.3% teachers said that students were less able to explain, express opinions, and make conclusions; 76.7% said that students are sufficiently able to explain, express opinions, and make conclusions. Future research related to biology learning in multiethnic students needs to be conducted to get more information. The design of learning tools needs to consider the ethnic of the students in strengthening critical thinking skills. Similar research needs to be done to obtain more information.The findings of this research are the students' ethnicities of the XI class of Natural Sciences, as well as the responses of high school biology teachers about students' critical thinking skills in Biology.

Banana is a plant with nutritious fruit and can help prevent stunting. Banana plants are widely cultivated in East Kalimantan, but the type characterization has not been identified. The purpose of this study was to determine the diversity of banana plants in East Kalimantan and to characterize banana plants based on morphology. This research is explorative in nature by identifying directly in the field the cultivated banana cultivars. Morphological characterization of stems, leaves and fruit was carried out based on the banana description contained in IPGRI-INIBAP/CIRAD. The research instrument is a banana morphology observation sheet which contains parameters: leaf habit, pseudostem color, predominant underlying color of the pseudostem, sap color, blotches at the petiole base, blotches color, petiole canal leaf III, color of leaf upper surface, color of midrib dorsal surface, color of leaf lower surface, color of midrib ventral surface, wax on leaves. The result shows that at East Kalimantan is found 12 types of banana cultivars were found, Talas bananas, Rutai bananas, Kepok bananas, Mas bananas, Morosebo bananas, Tanduk bananas, Susu bananas, Maulin bananas, Red bananas, Ambon bananas, Raja bananas, and Cavendish bananas.There are variations in the morphological characteristics of banana plants, leaves and fruit that can characterize each banana.