Analisis Kualitas Air Desa Nulle Kecamatan Amanuban Barat Kabupaten Timor Tengah Selatan

The importance of the role of water in life makes water conditions must be maintained both quantity and quality given the growing human life that also has an impact on the environment. The purpose of this study was to find out the condition and status of water contamination in springs used as drinking water in Nulle village, West Amanuban subdistrict, South Central Timor district. The method of collecting data is obtained from the field. The technique used to determine the location of sampling is the purposive sampling technique. The data collection stage is carried out by conducting initial surveys, determining sampling points, water sampling, examination of water samples in that way (directly) on temperature and pH parameters and in ex (laboratory) on the parameters of TDS, TSS, hardness, detergent, DO, COD and total coliform. The results of the study on both springs showed the value of each of the parameters tested was still within safe limits based on the Regulation of the Minister of Health of the Republic of Indonesia No. 32 of 2017 on Environmental Health Quality Standards and Water Health Requirements for Hygiene, Sanitation, Swimming Pool, Solus Per Aqua and Public Baths except the total coliform parameters in both springs that exceeded the quality standard by 50 amount / 100 mL according to. The average total coliform rate at station 1 is 50.33 total/100 mL and the average at station 2 is 107.67 total/100 mL. The status of water contamination at both stations based on the STORET method is moderate contamination

DETERMINATION OF TOTAL TANIN CONTENTS OF Terminalia Catappa, L. LEAF EXTRACT AND TEST OF ITS ABILITY AS A COMPLEXION AGENT OF Fe (III)

A study of the essential oil content in basil (Ocimum sanctum) and red lemongrass (Cymbopogon nardus L. Rendle) originally grown in Flores island has been conducted. The purpose of this study was to identify the chemotype of the essential oils obtained over stahl distillation using GC-MS. The Ocimum mainly consisted of 55% eugenol following by minor trans-alfa-bergometena, patchulana, and linalool. Meanwhile, the chemotype of the red lemongrass (Cymbopogon nardus L. rendle) were citronellol (22%), citronella, cyclohexamethanol, and viridiflorol

Pemanfaatan Arang Aktif Tempurung Kemiri (Aleurites moluccana L. Willd) Sebagai Adsorben Zat Warna Naphtol

It has been conducted a study about the utilization of candle nut shell coal (aleurites moluccana L. Willd) as adsorbent for naphtole dye, which it aims to know the characteristics of optimum condition covering pH, contact time, and adsorption consentration, along with the adsorption capacity of candle nut shell active coal (Aleurites moluccana L. Willd) against naphtole dye. The characteristics determination of candle nut shell active coal was done by identification of functional groups using FTIR. The determination of surface area, porous volume and porous size using SAA. The characteristics result using FTIR exhibited that the coal before and after activation contains functional groups of –OH, Csp3-H, CH2, CH3, CO Eter, aromatic C=C, and aromatic C-H. while, characterization using SAA showed the active coal surface area obtained is 17,20 m2/g with porous voleme is 0,021 mL/g and porous size is 1,60 nm. The optimum condition of adsorbent in adsorbing naptol dye is 60 ppm, takes place at pH 5 with contact time of 120 minutes. The adsorption capacity measure result of candle nut active coal obtained is 3,850 mg/g. adsorption process of naphtole dye follows Langmuir isotherm with R2 is 0.8939 and adsorption energy is 99,942 Kj/mol

TERMODINAMIKA ADSORPSI Ca(II) DAN Cd(II) PADA ADSORBEN AMPAS TAHU

Telah dilakukan penelitian untuk mengetahui kemampuan ampas tahu sebagai adsorben dalam mengadsorpsi Ca(II) dan Cd(II) baik secara tunggal maupun simultan. Penelitian ini dilakukan dalam beberapa tahap yaitu preparasi adsorben, karakterisasi adsorben yang meliputi penentuan kadar air, gugus fungsi, keasaman permukaan, dan luas permukaan, serta penentuan kemampuan adsorben dalam mengadsorpsi kedua jenis logam tersebut. Hasil penelitian menunjukkan bahwa kadar air adsorben (6,802%), gugus fungsi yang berperan dalam proses adsorpsi (-NH, -OH, dan C=O), keasaman permukaan (7 μmol/g) dan luas permukaan (7,843 m2/g). Adapun kapasitas adsorpsi Ca(II) lebih besar dari Cd(II) baik tunggal maupun simultan dimana nilai kapasitas adsorpsi Ca(II) tunggal (2.857,143 μmol/g), Ca(II) simultan (2.272,727 μmol/g), Cd(II) tunggal (806,452 μmol/g), Cd(II) simultan (769,231 μmol/g). Namun energi adsorpsi Cd(II) lebih besar dari Ca(II) baik tunggal maupun simultan, dimana nilai energi adsorpsi Cd(II) tunggal (20,995 kJ/mol), Cd(II) simultan (21,439 kJ/mol), Ca(II) tunggal (13,577 kJ/mol) dan Ca(II) simultan (13,761) yang sejalan dengan konsep asam basa keras lunak

Simple Microfluidic Paper-Based Analytical Device (μ-PAD) Coupled with Smartphone for Mn(II) Detection Using Tannin as a Green Reagent

The development of a simple yet greener microfluidic paper-based analytical device (μ-PAD) for on-site detection of Mn(II) in various types of waters using tannin as a natural reagent was described. The μ-PAD consists of twelve detection zones, created on a Whatman Number 1 filter paper by a simple drawing technique using an acrylic watercolor. The detection of Mn(II) was based on the color change on the reaction zone due to the reaction between Mn(II) and the pre-deposited tannin. The μ-PAD image was captured by a portable smartphone detector, and the blue intensity was digitized using a color picker application to generate the reflectance as the analytical response. The proposed method was characterized by a linear dynamic range of 0.05–0.25 mg L−1 with the limit of detection (LOD) for the determination of Mn(II) of 0.026 mg L−1. The other analytical merits of the proposed method, such as precision (RSD, 1.107%), accuracy (E, 6.697%), and recovery (104–112%), were all comparable to the existing spectrophotometric methods. The method’s successful application to natural water samples from manganese mining sites aligns with the reference spectrophotometric method, indicating its good selectivity and accuracy without significant influence of commonly associated interfering ions

ADSORPSI ZAT WARNA NAPHTOL MENGGUNAKAN ADSORBEN KULIT BUAH KAKAO (Theobroma cacao L.)

Abstrak Penelitian adsorpsi zat warna naphtol menggunakan adsorben kulit buah kakao (Theobroma cacao L.) telah dilakukan. Penelitian ini bertujuan untuk mengetahui karakteristik adsorben arang aktif kulit buah kakao (Theobroma cacao L.), mengetahui pengaruh pH, waktu kontak dan konsentrasi adsorpsi arang aktif kulit buah kakao (Theobroma cacao L.) terhadap zat warna naphtol dan mengetahui kapasitas adsorpsi arang aktif kulit buah kakao (Theobroma cacao L.) terhadap zat warna naphtol. Metode yang digunakan dalam penelitian ini adalah adsorpsi. Hasil yang diperoleh yaitu karakteristik dari adsorben arang aktif kulit buah kakao hasil analisis FTIR menunjukan bahwa adsorben  kulit buah kakao teraktivasi HCL mengandung gugus fungsi –OH, C-H, CH2, C-O dan C=C aromatik, hasil analisis SSA diperoleh luas permukaan sebesar 178,10 m2/g, dengan volume pori sebesar 0,16 cc/g dan ukuran pori sebesar 1,80 nm. Kondisi optimum adsorben arang aktif kulit buah  kakao terjadi pada pH 4, waktu kontak 90 menit dan konsentrasi 60 ppm. Kapasitas adsorpsi arang aktif kulit buah kakao dalam mengadsorpsi zat warna naphtol adalah sebesar 5,8651 mg/g. pola isoterm adsorpsi mengikuti isoterm langmuir dengan nilai R2 sebesar 0,8275 dan energi adsorpsi sebesar 25,627905 KJ/mol. Abstract Research on the adsorption of naphtol dyes using cocoa pods (Theobroma cacao L.) as an adsorbent has been carried out. This study aims to determine the characteristics of the adsorbent of activated charcoal cocoa pods (Theobroma cacao L.), determine the effect of pH, contact time and adsorption concentration of activated charcoal cocoa pods (Theobroma cacao L.) on naphtol dyes and determine the adsorption capacity of activated charcoal skins. cocoa pods (Theobroma cacao L.) against naphtol dyes. The method used in this research is adsorption. The results obtained are the characteristics of the activated charcoal adsorbent of cocoa pods. FTIR analysis results show that the adsorbent of activated cocoa pods HCL contains functional groups –OH, CH, CH2, CO and C=C aromatics, the results of SSA analysis obtained a surface area of ​​178.10 m2/g, with a pore volume of 0.16 cc/g and a pore size of 1.80 nm. The optimum condition of activated charcoal adsorbent of cocoa pods occurred at pH 4, contact time of 90 minutes and concentration of 60 ppm. The adsorption capacity of activated charcoal of cocoa pods in adsorption of naphtol dye was 5.8651 mg/g. The adsorption isotherm pattern followed the Langmuir isotherm with an R2 value of 0.8275 and an adsorption energy of 25.627905 KJ/mol

Molecular Docking of Chemical Compounds from n-Hexane Extract of Moringa oleifera Seeds with E.coli and S.aureus ATP Synthase Subunit C

The development of new antibiotics is an urgent need amidst the reported increase in bacterial resistance. The n-hexane extracts of Moringa oleifera seeds have been known to have antibacterial effects against E.coli and S.aureus. However, the mechanism of inhibition and the protein from these bacteria targeted by the chemical compounds from n-hexane extracts of Moringa seeds remains elusive. ATP synthase subunit c (ATPase c) plays an important role in the synthesis and hydrolysis of ATP providing energy for bacterial growth. It is an attractive for the new antibiotic development. This study aims to computationally study the interaction between the chemical compound from n-hexane extract of Moringa seeds and ATPase c from E. coli and S. aureus that may shed the light on their inhibitory potentials using molecular docking method. The compound trans-9-octadecenoic acid shows the highest affinity energy with ATPase c from E. coli (-4.1 kcal/mol). Meanwhile, 9-cis-octadecanoic acid and glycerol-1,3-dioctadecanote show the highest interaction (-4.3 kcal/mol) with ATPase c from S.aureus. Nonetheless, these interaction energies are lower than a positive control Tomatidine on ATPase c E.coli (-6.9 kcal/mol) and S. aureus (-6.2 kcal/mol). Further in vitro assays are needed to validate their potential as novel antibacterial candidates