JURNAL KIMIA MULAWARMAN
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Modification Of Kaolin Capkala With Benzalkonium Chloride (Bkc) Surfactant And Antibacterial Activity Test Against Escherichia Coli
Full text linkA study was conducted to determine the antibacterial activity of modified benzalkonium chloride (BKC) kaolin Capkala against Escherichia coli (E. coli) bacteria. Kaolin modification begins by melting kaolin with sodium hydroxide (NaOH) and reacting using a reflux device. Furthermore, the sample was reacted with BKC at a concentration variation of 0, 2.5×10-3; 5×10-3, and 2.5×10-2 M for 6 hours with a stirring speed of 150 rpm. The modified kaolin was characterized using Fourier Transformed Infrared (FTIR), and adsorption tests were performed on Cl-. The FTIR spectrum of the modified kaolin showed an absorption peak at 2926.19 cm-1 C-H symmetrical from CH2, which indicated the attachment of surfactant to the kaolin. BKC modified kaolin antibacterial activity test using the halo test method. The adsorption test on Cl- and the antibacterial activity test on kaolin and modified kaolin increased with increasing BKC concentration, namely 3545; 3828.6, 3970.4; 4183.1 mg/L and the inhibitory diameter were 2.1±0.14, 3.3±0.14, 4.5±0.14, and 6±0.14 mm, respectively. The results showed that BKC can increase the antibacterial activity of kaoli
Ekstraksi EKSTRAKSI DAN KARAKTERISASI PEKTIN DARI LIMBAH KULIT JERUK LIMAU (Citrus amblycarpa)
No full textResearch on the extraction and characterization of pectin from lemon lime peel waste (Citrus amblycarpa) has been done. The purpose of this research is to process lime waste into raw material of pect
Active Compounds of Sembung Leaves (Blumea balsamifera DC) in Silico Screening as Antihypertensives
Full text linkHypertension is a structural or functional change in the arteries or the organs it supplies caused by increased blood pressure. Angiotensin-converting enzyme (ACE) can increase blood pressure by converting inactive angiotensin I to active (angiotensin II). Captopril is a hypertension drug that can inhibit ACE activity. Sembung leaf (Blumea balsamifera DC) is a plant that can potentially have antihypertensive activity. This study aims to identify the interaction of active compounds in sembung leaves against ACE as antihypertensive drug candidates through an in silico test based on pharmacodynamic and pharmacokinetic parameters using two docking software, Autodock Vina and PyRx. The results showed that Luteolin was the best test ligand besides having lower ΔG and Ki than control ligands and higher Kd than control ligands. Luteolin was identified to interact with Zn and hydrogen bond interactions at the active site and met the criteria in Lipinski analysis, ADME, and toxicity, so this compound is relatively safe to be used as a drug candidate for the treatment of hypertension
Determination of Secondary Compounds in Extracts from Catfish (Pangasius sp)
Full text linkIkan patin (Pangasius sp.) umumnya dijumpai pada perairan air tawar di Indonesia, seperti di Sumatera dan Kalimantan. Di Sumatera Selatan, ikan jenis ini digunakan sebagai salah satu kuliner seperti pindang dan brengkes. Tujuan dari penelitian ini adalah untuk mengetahui kandungan fitokimia metabolit sekunder dari ekstrak ikan patin (Pangasius sp.). Metode yang digunakan pada penelitian ini adalah studi deskriptif dengan menggunakan ekstrak yang diperoleh dari kulit, tulang, dan daging ikan patin. Ekstrak yang digunakan adalah ekstrak dari pelarut etanol, etil asetat, dan n-heksana dengan proses maserasi dan akudes dengan proses infusa. Hasil penelitian menunjukkan bahwa pada ekstrak etanol, kulit ikan mengandung alkaloid, saponin, dan steroid; pada tulang mengandung flavonoid dan saponin; pada daging mengandung alkaloid, saponin, dan flavonoid. Pada ekstrak etil asetat, kulit dan tulang ikan mengandung alkaloid; sedangkan pada daging mengandung flavonoid dan steroid. Pada ekstrak n-heksana, kulit ikan mengandung alkaloid dan steroid; tulang ikan mengandung alkaloid; dan daging ikan mengandung saponin dan terpenoid. Pada akuades, kulit ikan mengandung alkaloid, saponin, tanin, dan steroid; tulang ikan mengandung alkaloid; danging ikan mengandung alkaloid, flavoid, dan saponin. Kesimpulan dari penelitian ini bahwa Pangasius sp. memiliki metabolit sekunder alkaloid, flavonoid, saponin, tanin, terpenoid, dan steroid
IDENTIFIKASI SENYAWA METABOLIT SEKUNDER DAN UJI AKTIVITAS ANTIOKSIDAN PADA LIMBAH KULIT BUAH
Full text linkIndonesia adalah negara yang menyimpan kekayaan sumber daya hayati, terutama buah tropika. Tingginya keragaman tanaman buah di Indonesia menghasilkan berbagai manfaat untuk kesehatan, di antara lain sebagai antioksidan. Tidak hanya terdapat dibuah, kulit buah juga mengandung antioksidan untuk kesehatan. Manfaat antioksidan bagi tubuh di antaranya untuk melindungi sel-sel tubuh dari kerusakan yang diakibatkan oleh radikal bebas. Senyawa radikal bebas terdapat dalam lingkungan kehidupan sehari-hari manusia. Polusi udara merupakan salah satu contoh sumber radikal bebas. Sumber radikal bebas lainnya yaitu racun, paparan sinar matahari berlebih, asap rokok, makanan yang digoreng, dan obat-obat tertentu. Tujuan dari literature review ini adalah untuk mengetahui metabolit sekunder dan aktivitas antioksidan yang terdapat pada limbah kulit buah sebagai mengakal radikal bebas. Metode yang digunakan dalam karya tulis ini penelusuran pustaka melalui database Google dan Google Scholar dengan menggunakan keyword. Jurnal yang telah ditemukan dilakukan screening dengan kriteria inklusi dan eksklusi. Berdasarkan hasil dari berbagai penelusuran yang dicantumkan dalam artikel menunjukkan aktivitas antioksidan yang tinggi terdapat pada limbah kulit buag naga yaitu nilai IC50 adalah 2,69 ppm
Efek Larvasida Ekstrak Tegates erecta Fraksi Heksan dan Aseton terhadap Larva Nyamuk Aedes aegypti Instar 3 dan 4
Full text linkResistance to temephos as a larvicide of A. aegyptimosquitoes has occurred in Indonesia. Therefore, it is necessary to look for other active compounds that can act as larvicides, but also environmentally friendly. This study used leaf and roots extract of T. erectahexane and acetone fraction as larvicide. The process begins with drying followed by extracting samples (leaves and roots of T. erecta) each with hexane and acetone solvents. Test solutions were made with a concentration of 0, 0.0075, 0.015, 0.03, and 0.1% (w/v) of the extract produced. Larvicide test was carried out referring to WHOPES by observing the mortality of instar larvae 3 and 4 in each extract. The results obtained showed the mortality percentage of larvae increased with increasing concentration and exposure time in both types of larvae. The lowest LC 50 was obtained from the root extract of hexane fraction (37 ppm) for 3rd instar larvae and acetone fraction (61 ppm) for instar 4 larvae.
Keywords: Larvae, A. aegypti, T. erecta. FractionResistensi terhadap temephos sebagai larvasida nyamuk A. aegypti telah terjadi di Indonesia. Oleh karena itu, dirasa perlu mencari senyawa aktif lain yang dapat berperan sebagai larvasida, namun juga harus ramah lingkungan. Penelitian ini menggunakan ekstrak daun dan akar T. erectafraksi heksan dan aseton sebagai larvasida. Proses diawali dengan pengeringan dan ekstraksi sampel (daun dan akar T. erecta) masing – masing dengan pelarut heksan dan aseton. Dibuat larutan uji dengan konsentrasi 0, 0,0075, 0,015, 0,03, dan 0,1 % (b/v) dari ekstrak yang dihasilkan. Uji larvasida dilakukan mengacu pada WHOPES dengan mengamati mortalitas larva instar 3 dan 4 pada masing – masing ekstrak. Hasil yang diperoleh menunjukan persen mortalitas larva bertambah seiring dengan bertambahnya konsentrasi dan waktu paparan pada kedua jenis larva. LC50terendah diperoleh dari ekstrak akar fraksi heksan (37 ppm) untuk larva instar 3 dan fraksi aseton (61 ppm) untuk larva instar 4.
Kata kunci: Larva,A. aegypti, T. erecta. Fraks
ANTIMICROBIAL ACTIVITY OF BACTERIAL CELLULOSE MODIFIED WITH PLANT EXTRACTS
Full text linkBacterial cellulose (BC) is utilized in numerous industries, including the cosmetic, biomedical, and packaging industries. Nonetheless, BC lacks antibacterial activity and must be combined with antimicrobial agents, including plant extracts. This review aims to give information on the antibacterial activity of BC that has been modified by the addition of plant extracts. The method used in this study is article review. Articles were selected from Q1-Q3 category international journals published within the recent decade. Based on the results, extracts of rhizomes, ethanol extracts of gwarri stems and leaves, oregano leaves, rosemary leaves, lovage leaves, parsley leaves, green tea leaves, rosella petals, and red and pink variants of hibiscus flowers, bitter melon seeds, gletang leaves, arabica coffee, and andaliman fruit, temu Kunci dimethyl sulfoxide extract, mulberry leaf NaOH extract, pomegranate skin water extract, and rosemary leaves have been used to modify BC. Antimicrobial activity showed the most significant increase in BC-modified ethanol extract of rosella petals at a concentration of 500 ppm with an OD600 of 0% against Pseudomonas aeruginosa. FTIR and SEM investigations of pure BC and BC modified with plant extracts revealed variations in functional group content and three-dimensional fibrillar network structure
PREPARATION OF FE-DOPED ZINC OXYSULFIDE (Fe-Zn(O,S)) WITH SURFACE DEFECT FOR HYDROGEN EVOLUTION REACTION
Full text linkIn this study, Fe-doped Zn(O,S) has been successfully fabricated by a one-step preparation process using chemical wet method. The Fe-doped Zn(O,S) photocatalysts were studied by varying the content of Fe dopant. The characterizations of Fe-doped Zn(O,S) were carried out by SEM and XRD analyses to determine the morphology and phase of samples. Furthermore, the optical and electrochemical properties were characterized through EIS, TPC, DRS and PL analyses. Briefly, Zn(O,S) with 5% Fe amount exhibited the most optimum condition as compared to other Fe amounts in which it showed better charge separation with the hydrogen evolution amount of 29000 mikromol/g in 10% EtOH solution. Lastly, the proposed mechanism is initially by the trapping of water molecules in the oxygen vacancy (defect) in Fe-Zn(O,S) sample followed by the reduction to generate hydrogen (H2) gas via the intermediate of proton (H+)
Adsorption Of Methylene Blue Using Active Charcoal From Empty Fruit Bunch (EFB)
Full text linkResearch on the adsorption of methylene blue by activated charcoal from Empty Fruit Bunch (EFB) has been carried out. This study aimed to synthesize activated charcoal from EFB, characterize it, and use it as an adsorbent for methylene blue. Activated charcoal was synthesized by carbonation in a furnace at 300oC for 1 hour. Chemically, activation was carried out by immersion in HCl solution for 24 hours. Characterization was carried out by proximate test, determination of functional groups using Fourier Transform Infrared (FT-IR), and determining material shape with X-Ray Diffraction (XRD). The study of activated charcoal adsorption as methylene blue adsorbent was carried out by treating variations in contact time, adsorbent weight, and concentration. The results of the proximate test with the parameters of surface area, moisture content, and ash content were 162.12 m2/g, 0.52%, and 5.27%, respectively. The results of the FT-IR characterization test showed an aromatic C–H, C=C and C–O. Based on the results of characterization with XRD giving a pattern at a diffraction angle of 2 20 - 30o, it was seen that there was a wide peak, which indicated that it had an amorphous structure. The optimum conditions for methylene blue adsorption occurred at a contact time of 40 minutes, and the adsorbent weight was 0.1 g for 10 mL of 50 ppm methylene blue. The adsorption of methylene blue followed the Freundlich isotherm adsorption pattern and had a maximum adsorption capacity of 8.92 mg/g
CHARACTERIZATION PHYSICAL AND CHEMICAL OF SESAME SEED OIL (Sesamum indicum L.) METHYL ESTER AND COMPOSITION
Full text linkThe methyl ester of sesame seed oil (Sesame seeds L.) was used to make diethanolamide. This process involvedextraction, transesterification, and amidation. The research revealed that extraction by maceration yielded a sesame seed oil yield of 36.14 percent, an acid number of 1.1531 mg KOH/g, a FFA number of 0.5796 percent, and a saponification number of 51.287 mg KOH/g. In the process of converting sesame seed oil to methyl ester, the acid number was 0.5126 mg KOH/g, the FFA number decreased to 0.2704%, and the saponification number was 50.049 mg KOH/g. According to methyl ester GC-MS analysis, methyl oleate made up 39.13% of the methyl ester of sesame seed oil. The methyl ester FT-IR spectrum exhibits a specific absorption peak at 1743 cm-1 for C=O ester.Synthesis of dietanolamide from sesame seed oil (Sesamum indicum L.) methyl ester has been carried out includes extraction process, transesterification and amidation. The research results showed that extraction process by maceration obtained the yield of sesame seed oil was 36.14%, acid number was 1.1531 mg KOH/g, FFA number was 0.5796% and saponification number was 51.287 mg KOH/g. In the conversion process of sesame seed oil to methyl ester through transesterification and give an acid number was 0.5126 mg KOH/g, FFA number drops to 0.2704% and saponification number was 50.049 mg KOH/g. Based on methyl ester GC-MS analysis, the most dominant composition of the sesame seed oil methyl ester was methyl oleate 39.13%. Based on methyl ester FT-IR spectrum gives a specific absorption to peak C=O ester at wave number 1743 cm-1