A new compound belonging to a dihydrotetrazolopyrimidine derivative, that is, ethyl 5-methyl-7-(4-morpholinophenyl)-4,7-dihydrotetrazolo[1,5-a]pyrimidine-6-carboxylate, was successfully synthesized using a Biginelli reaction between 4-morpholinobenzaldehyde, ethyl acetoacetate, and 5-aminotetrazole with p-toluenesulfonic acid (pTSA) as a catalyst in ethanol under reflux. The molecular structure of the title compound was characterized on the basis of spectroscopic evidence, using FTIR, HRESI-MS, 1H- and 13C-NMR, and 2D NMR.
Oksida grafena tereduksi telah berhasil diproduksi dari oksida grafenadengan menggunakan asam format sebagai agen pereduksi. Tujuan penelitian iniuntuk mensintesis oksida grafena tereduksi. Banyak penelitian yangc menunjukkanbahwa material ini memiliki sifat-sifat fisika yang baik. Dalam penelitian inimenggunakan metode modifikasi Hummer untuk menghasilkan oksida grafena.Selanjutnya direduksi dengan asam format untuk mendapatkan oksida graphenetereduksi. Hasil penelitian dengan menggunakan FT-IR menunjukkan bahwaoksida grafena tereduksi dengan puncak tertentu (gugus fungsi oksigen) secarabesar berkurang intensitasnya setalah direduksi dengan asam format. Sementaraitu, karakterisasi dengan XRD menunjukkan d-spacing berkurang dari 7.75Åmenjadi 4.00Å. Ini dapat dijelaskan karena pengurangan gugus fungsi oksigen.Kemudian hasil penghalusan Le Bail menunjukkan sampel mengadopsi ruang grupP B C A. Perubahan parameter kisi ditemukan setelah oksidasi dan reduksi,khususnya pada parameter a dan b. Parameter a dan b menunjukkan panjang sisitepi dari sistem kristal.
Tahura Lati Petangis has officially become a forest area through the Decree of the Minister of Environment and Forestry Number SK.4335/MenLHK-PKTL/KUH/2015. In accordance with the Lati Petangis Tahura Management Plan Document 2019-2028, the Utilization Block will be designated for the development of ecotourism, educational tourism, environmental services and appropriate plant development. The development of ecotourism in the Tahura area is the cultivation of pollinating insects, namely honey bees with Trigona sp. which produces kelulut honey products. Kelulut honey products will be more valuable in the market if their quality and safety are guaranteed in accordance with the quality requirements listed in SNI. This community service aims to assist community groups in the Tahura area by testing the resulting kelulut honey products, so as to increase market value. The test results show that in general, all the honey tested has met the standard honey parameters which guarantee the purity of the honey produced in the Tahura Lati Petangis area where kelulut honey has a sourer taste than forest honey. The typical honey produced in the Tahura Lati Petangis area has a sweet-sour taste that is very good for consumption to maintain and increase body stamina.
Tahura Lati Petangis is a forest park located in Paser Regency, East Kalimantan Province, with the management area in Batu Engau District. Tahura Lati Petangis area has a water source in the form of a lake that can be used to fulfill water resources for the surrounding area. In addition, there are also types of toman fish that have a large enough potential to be exploited. Toman fish is processed into one type of food in the form of shredded. Shredded products will be more valuable in the market if their quality and safety are guaranteed in accordance with SNI quality requirements. This service activity aims to assist community groups around the Tahura area by testing the shredded products. Through this service activity, the quality and safety of shredded toman fish products is maintained for the market, so as to increase the market value of the product. The test results showed that the shredded toman fish had met SNI standards and were free from microbial and metal contamination.
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