Penelitian ini menghasilkan Lembar Kerja Peserta Didik (LKPD) Matematika bermuatan HOTS. Proses pengembangan LKPD ini menggunakan model-4D yang dikemukakan oleh Thiagarajan yang terdiri dari 4 tahap yaitu pendefinisian, desain, pengembangan, dan uji produk. Subyek yang digunakan adalah siswa kelas VIIISMPNegeri 2 Karanglewas.Teknik pengumpulan data meliputi angket hasil validasi dan kepraktisan. Analisis data yang dipakai meliputi data kualitatif dan kuantitatif. Hasil uji validasi LKPD dari ketiga validator diperoleh skor rata-rata 3,13 yang menunjukkan LKPD valid. Hasil uji kepraktisan LKPD diperoleh rata-rata 3,01 yang berarti praktis. Dengan demikian, LKPD berbasis HOTS materi Himpunan valid dan praktis serta dapat digunakan dalam kegiatan pembelajaran.  Abstract This research produce Mathematics Student Worksheets containing High Order Thinking Skills (HOTS). The process of Student Worksheets development was conducted using the 4D model proposed by Thiagaradjan consisted of 4 stages, namely the stage of define, design, develop, and disseminate. The subjects used were grade VIII students of SMP Negeri 2 Karanglewas. The data technique used was a questionnaire of validation results and practicality. The data analysis used includes qualitative and quantitative data. The Student Worksheets validation test results from the three validators obtained an average score of 3.13 which indicates a valid. LKPD practicality test results obtained an average of 3.01 which means practical. Thus, the student worksheets based HOTS of set material is valid and practical and can be used in learning activities.

In the present work, optimum conditions for hydrocracking of waste palm cooking oil (WPCO) over a Ni-NH2/Lapindo mud catalyst were studied to obtain a high quantity and quality of biofuel. The utilized catalyst support material was Lapindo mud (LM) from Sidoarjo, Indonesia, which was only given physical treatment (i.e., washing, drying, grinding, and calcining). Ni/LM was prepared via wet impregnation in three different Ni weight loadings: 1, 5, and 10 wt.%, which were denoted as Ni(A)/LM, Ni(B)/LM, and Ni(C)/LM, respectively. As a result, the hydrocracking test of WPCO under the temperature of 470 °C and a feed/catalyst weight ratio of 50 showed that the Ni(A)/LM catalyst produced the highest liquid product reaching 46.65 wt.% among the other Ni-based catalysts. The liquid product can be increased drastically to 63.93 wt.% under a more optimum temperature at 550 °C. Functionalization of Ni(A)/LM as the best catalyst was carried out by grafting method with NH2 groups from 3-APTMS, resulting in Ni(A)-NH2/LM. This modification increased the liquid product to 68.17 wt.% under hydrocracking conditions using a weight ratio of 75. Moreover, the reusability of Ni(A)-NH2/LM was found to be effective for three hydrocracking runs, constantly yielding an average biofuel of 80 wt.%.

ABSTRAK Munculnya varian baru Covid-19 menyebabkan kekhawatiran utama karena varian Omicron ini lebih menular dibandingkan dengan varian lainnya. Upaya yang dapat dilakukan untuk memutus mata rantai infeksi Covid-19 melalui langkah pencegahan, salah satunya adalah penggunaan handsanitizer. Permasalahan yang dihadapi oleh mitra dalam pengabdian masyarakat ini adalah lokasi desa yang jauh dari fasilitas kesehatan dan susah mendapatkan handsanitizer. Selain itu masyarakat Desa Kuluran kecamatan Kalitengah belum memahami bahwa handsanitizer dapat dibuat dari bahan alami yaitu daun sirih dan jeruk nipis sehingga pada pengabbdian masyarakat ini memberdayakan masyarakat utuk membuat handsanitizer dengan bahan alami. Metode yang digunakan pada pengabdian masyarakat ini berupa partisipasi masyarakat dengan indikator kesertaan masyarakat dalam kegiatan melalui sosialisasi dan pelatihan. Kegiatan dilaksanakan lima tahap yaitu; identifikasi masalah dan potensi desa, analisis kebutuhan mitra, penyusunan program bersama, sosialisasi dengan metode diskusi kelompok tentang pembuatan Handsanitizer ekstrak daun sirih dan dilanjutkan dengan pelatihan pembuatan handsanitizer alami. Kegiatan pengabdian masyarakat ini dilakukan di Desa Kuluran Kecamatan Kalitengah Kabupaten Lamongan pada bulan Desember 2021 yang dihadiri oleh 25 orang yang tergabung dalam kelompok asuhan mandiri TOGA. Hasil akhir dari pengabdian masyarakat ini menunjukkan bahwa kemampuan masyarakat dalam membuat handsanitizer secara mandiri tergolong dalam kategori baik yaitu >75% mampu membuat handsanitizer sesuai prosedur. Dengan adanya penyuluhan pembuatan hand sanitizer dari bahan alam sebagai bahan baku diharapkan masyarakat bisa memanfaatkan bahan disekitarnya untuk mencegah dan menanggulangi Covid-19. Kata Kunci: Covid-19; Daun Sirih; Hand Sanitizer ABSTRACT A new variant of Covid-19 caused a major emergence because this Omicron variant is more contagious than other variants. Efforts that can be made to break the chain of Covid-19 infection through preventive measures, one of which is the use of hand sanitizer. The problem faced by partners in community service is the location of the village which is far from health facilities and it is difficult to get hand sanitizer. In addition, the people of Kuluran Village, Kalitengah sub-district do not understand that hand sanitizer can be made from natural ingredients, namely betel leaf and lime so that this community service empowers the community to make hand sanitizer with natural ingredients. The method used in this community service is in the form of community participation with indicators of community participation in activities through socialization and training. Activities carried out in five stages; knowing the problems and potential of the village, training on partner needs analysis, joint program preparation, socialization with the group discussion method on making betel leaf extract Handsanitizer and continued with making natural hand sanitizer. This community service activity was carried out in Kuluran Village, Kalitengah Subdistrict, Lamongan Regency in December 2021 which was attended by 25 people who are members of the TOGA group. The final result of this community service shows that the community's ability to make hand sanitizer independently belongs to the good category, namely >75% able to make hand sanitizer according to the procedure. With counseling on the manufacture of hand sanitizers from natural ingredients as raw materials, it is hoped that the community can use the surrounding materials to prevent and cope with Covid-19. Keywords : Covid-19; betel leaf ; Hand Sanitizer