Garuda - Garba Rujukan Digital

p-Index From 2021 - 2026

0.562

P-Index

This Author published in this journals

All Journal VALENSI Jurnal Sains Materi Indonesia Jurnal Sains dan Teknologi Nuklir Indonesia (Indonesian Journal of Nuclear Science and Technology) Microbiology Indonesia EduChemia: Jurnal Kimia dan Pendidikan

Hendrawati Hendrawati

Universitas Islam Negeri Syarif Hidayatullah Jakarta

Author-ID : 2994062

Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Energy Environmental Science Immunology & microbiology Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Physics

Published : 16 Documents Claim Missing Document

Claim Missing Document

Articles

1 2

Penggunaan Biji Asam Jawa (Tamarindus indica L.) dan Biji Kecipir (Psophocarpus tetragonolobus L.) Sebagai Koagulan Alami Dalam Perbaikan Kualitas Air Tanah Hendrawati Hendrawati; Delsy Syamsumarsih; Nurhasni Nurhasni
Jurnal Kimia Valensi Jurnal Valensi Volume 3, No.1, Mei 2013
Publisher : Syarif Hidayatullah State Islamic University

AbstrakPenggunaan Biji Asam Jawa (Tamarindus indica L.) dan Biji Kecipir (Psophocarpus tetragonolobus L.) Sebagai Koagulan Alami dalam Perbaikan Kualitas Air Tanah telah dilakukan. Penelitian bertujuan untuk mengetahui kemampuan serbuk biji asam jawa dan biji kecipir sebagai biokoagulan untuk memperbaiki kualitas air dan pengaruhnya terhadap parameter kualitas air, yang meliputi: temperatur, pH, konduktivitas, kekeruhan, oksigen terlarut, kandungan logam berat, dan total koliform. Hasil jar test diperoleh dosis optimum 0,009% (penurunan turbiditas 99,72%) untuk biji asam jawa dan 0,03% (penurunan turbiditas 92,03%) untuk ekstrak biji kecipir. Nilai pH optimum diperoleh pada pH 3 untuk kedua jenis biokoagulan. Penggunaan ekstrak biji asam jawa dan biji kecipir dan tidak memberikan pengaruh yang berarti terhadap parameter temperatur, pH, konduktivitas,dan logam berat. Penggunaan ekstrak biji kecipir dan biji asam jawa tidak menurunkan angka BOD. Ekstrak biji asam jawa mampu menurunkan angka total koliform sedangkan ekstrak biji kecipir tidak efektif dalam menurunkan angka total koliform. Kata Kunci: Koagulasi, Asam jawa (Tamarindus indica L.), Kecipir (Psophocarpus tetragonolobus L.), Jar test, Air tanah, MPN.Abstrack The Use of Tamarind Seeds (Tamarindus indica L.) and Winged Bean Seeds (Psophocarpus tetragonolobus L.) As Natural Coagulant in Groundwater Quality Improvementhas been done. The aims of this study is to determine the ability of tamarind seeds and winged bean seeds as biocoagulant to improve water quality and its effect on water quality parameters, which include: temperature, pH, conductivity, turbidity, dissolved oxygen, heavy metal content, and total coliform. Jar test results obtained optimum dose of 0.009% (99.72% reduction in turbidity) to tamarind seeds and 0.03% (92.03% reduction in turbidity) to winged bean seeds. The optimum pH obtained at pH 3 for both types of biocoagulant. The use of tamarind seeds and winged bean seeds does not have much influence on the parameters of temperature, pH, conductivity, and heavy metals. They also did not reduce the number of BOD. Tamarind seeds reduce the number of total coliform while winged bean seeds are not effective in reducing the number of total coliform. Keywords: Coagulation, Tamarind (Tamarindus indica L.), Winged bean (Psophocarpus tetragonolobus L.), Jar test, Groundwater, MPN.

Pemanfaatan Kulit Kacang Tanah (Arachis hipogaea L.) sebagai Adsorben Zat Warna Metilen Biru Nurhasni Nurhasni, M.Si; Reski Mar'af; Hendrawati Hendrawati
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 4, No. 2, November 2018
Publisher : Syarif Hidayatullah State Islamic University

Dye waste is a major problem in controlling environmental impacts. Dyestuff waste is an organic compound that is difficult to decompose, resistant, and toxic. If the waste is discharged into the water, it will cause environmental pollution. Research on the absorption of dyestuff of methylene blue by activated peanut shells has been carried out. The purpose of this study was to determine the adsorption efficiency, adsorption capacity, optimum conditions of dye adsorption including variation of contact time, adsorbent concentration, pH, and dye concentration. Adsorption test is carried out by batch method using a shaker. The adsorbent was then analyzed using FT-IR and SEM instruments. The results showed that, after activating the adsorbent had a better character than before activated. Peanut skin that has been activated with optimum NaOH against methylene blue, optimum conditions for adsorption of methylene blue dyestuff with 60 minutes contact time with alkaline activation adsorbent, optimum adsorbent concentration 1%, 50 ppm dye concentration, adsorbent size <180 μm, pH 9 The adsorption isotherm pattern follows the Freundlich isotherm.

Penggunaan H-Zeolit dan Tawas dalam Pemurnian Crude Glycerol dengan Proses Adsorpsi dan Koagulasi Isalmi Aziz; Nur Hijjah Bayani Fadhilah; Hendrawati Hendrawati
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 3, No. 1, Mei 2017
Publisher : Syarif Hidayatullah State Islamic University

Production of biodiesel from used cooking oil byproducts such as crude glycerol with low purity. The crude glycerol containing compounds impurities such as free fatty acids, alcohol, soap, catalyst and water. Compound adsorption of impurities can be done with the H-zeolite as adsorbent, but the resulting quality is still not good. To improve its quality, this research was added alum (coagulation) process so that the adsorption of colloidal-sized compound impurities which can be separated from the glycerol. The purpose of this research is determine optimal condition of adsorption and coagulation impurity compounds of crude glycerol by using H-zeolite and alum and also determine quality of glycerol was obtained. First, crude glycerol acidified by phosphoric acid 85% (pure analysis) until desired pH ±2.5. It was obtained purity of glycerol 72.797%. The next process is adsorption with activated H-zeolite and it obtained purity of glycerol 77.079%. The last process in this research is adsorption and coagulation by using H-zeolite and alum. The highest purity glycerol 93.803% was obtained from condition of adsorption and coagulation for 75 minutes; alum’s concentration 80 ppm; and temperature 60 ºC. The glycerol discharged from adsorption and coagulation process by using H-zeolite and alum is qualify Indonesia National Standard number 06-1564-1995 with 3.512% water content; 2.438% ash content; 0.247% MONG content; has no sugar; 1.259 g/mL density of glycerol; 0.2356% potassium content and 0.0410% aluminium content; and brighter color.DOI: http://dx.doi.org/10.15408/jkv.v0i0.5143

Characterization and Anticancer Activity from Gaharu (Aquilaria malaccensis) Stem Bark Extract Tarso Rudiana; Elda Suci Yala Merru; Hendrawati Hendrawati; Dede Sukandar
EduChemia (Jurnal Kimia dan Pendidikan) Vol 6, No 2 (2021)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Aquilaria malaccensis is a plant species from the Thymeleaceae family. A. malaccensis contains secondary metabolites of phenolic groups, namely benzophenone, chromone, coumarin, xanthone, and flavonoids with various biological activities such as antioxidants and anticancer. This study aims to determine the potential of A. malaccensis stem bark extract as an anticancer and to determine the characteristics of secondary metabolite compounds contained in A. malaccensis stem bark extract. Extraction of the stem bark of A. malaccensis by maceration method in stages using n-hexane, ethyl acetate and methanol as solvents. The anticancer activity test used the microculture tetrazolium (MTT) assay against Murine Leukemia P-388 cells. Compound separation using thin layer chromatograph (TLC) and gravity column chromatography (CC) methods. Determination of chemical compounds using liquid chromatography mass spectroscopy/mass spectroscopy (LCMS/MS). The extracts of n-hexane, ethyl acetate, and methanol each had anticancer activity which was classified as active with an IC50 value of 20.64, 26.61, and 14.49 µg/mL. Based on the results of separation and identification of compounds in methanol extract with TLC, CC, and LCMS/MS, methanol extract contains acetaminophen, aminosamptothesin, isophorone, diethyl phthalate, 3-hydroxy-6H-benzochromen-6-one, isolongifolenic, 2-(2-phenethyl) chromone, 4′,7-dihydroxy-2′,5-dimethoxyisoflavone, 4-hydroxy-3-(1-phenylpropyl)-2H-chromone-2-one; 6-methylchromone-2-carboxylic acid; 3,4-dimethyl-2- phenylmorpholine; and β-calacoren compounds.

Properties of an Extracellular Protease of Bacillus megaterium DSM 319 as Depilating Aid of Hides BUDIASIH WAHYUNTARI; HENDRAWATI HENDRAWATI
Microbiology Indonesia Vol. 6 No. 2 (2012): June 2012
Publisher : Indonesian Society for microbiology

Properties of a Bacillus megaterium DSM319 extracellular protease which are related to its application for depilating hides were investigated. The properties observed were optimum temperature and pH, the type of protease, and type of the protein which could be hydrolyzed by the enzyme. The enzyme was produced in a 3.5 liters LKB jar fermentor in a medium containing (2.0% v v-1 molasses and 1.3% w v-1 urea at 37 ºC , pH 7.5, aeration 1 vvm, agitation 250 rpm for 24 hours). The enzyme solution was concentrated by means of membrane ultrafiltration followed by ammonium sulfate precipitation at 70% w v-1 saturation. Optimal temperature and pH were observed at 30 ºC and pH 8 respectively. Two mM PMSF and EDTA inhibited the enzyme leaving level of activity of 84.5 and 4.3% correspondingly, indicated that the crude enzyme might be a metal requiring serine protease. The presence of 0.5, 2.0, and 3.5 mM CaCl caused an increase of the enzyme activity of 73, 88, and 79% respectively. The enzyme was able to hydrolyze Na-Benzoyl-DL-Arginine p-Nitro Anilide, a specific amino acid sequence cleaved by trypsin at a reaction rate of 0.024 absorbance value at 405 nm per minute. The enzyme was capable of hydrolyzing bovine serum albumin, hemoglobin, and gelatin, and to hydrolyze alkaline soluble collagen and keratin. The K value of the enzyme for hydrolysis of bovine serum albumin and gelatin was 3.44 m and 1.65 mg mL-1, whereas V values were 8.09 and 55.24 mg mL-1 respectively. The experimental data showed max that the crude enzymes have potential for dehairing of cowhides.

ANALYSIS OF CS-137 RADIONUCLIDE ON THE EAST JAKARTA FLOOD CANAL WATER SAMPLES USING GAMMA SPECTROMETER Indah Dwi Cahyati; Hendrawati Hendrawati; Ghulam Fathul Amri
Jurnal Sains dan Teknologi Nuklir Indonesia (Indonesian Journal of Nuclear Science and Technology) Vol 22, No 2 (2021): Agustus 2021
Publisher : HIMNI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/jstni.2021.22.2.6438

Radionuclide Cs-137 is a radioactive element that is soluble in water, so its distribution in the environment is influenced by mixing and diffusion, so that Cs-137 radionuclide can cause harmful effects on biotic and abiotic components in the waters. The East Jakarta Flood Canal is a macro drainage system for the city of DKI Jakarta that drains water to Marunda beach, most of the water quality has been polluted with light to heavy levels of pollution. This study aims to determine the water quality of the East Jakarta Flood Canal including in situ and ex situ physical and chemical properties parameters (temperature, pH, salinity and TDS) and Cs-137 radionuclide concentration parameters and the distribution pattern of Cs-137 radionuclides at each sampling point. The samples used were water and kale, the samples were filtered and concentrated from the initial volume of 20 liter of water to 1 liter of water and 10 kilograms to 1 kilogram of Kale plant. The levels of Cs-137 were measured with a gamma spectrometer instrument for 3600 seconds, then data analysis was carried out. The results obtained are the concentration level of Cs-137 in Simplo KBT water ranging from 0-1.571 Bq/L, for duplo 0-0.424 Bq/L while for kale plant 0-3,228 Bq/Kg the overall results are within the quality standard limits set by regulations. the head of BAPETEN Number 7 of 2013 concerning the limit value of environmental radioactivity, which is 2.6Ã—102 Bq/L.

Co-Authors Ahmad Fathoni BUDIASIH WAHYUNTARI Dede Sukandar Delsy Syamsumarsih Elda Suci Yala Merru Ghulam Fathul Amri Indah Dwi Cahyati Isalmi Aziz Lisa Adhani Muhammad Nizar Aristya Niah Kusuma Hapsari Nubzah Saniyyah Nuni Nurbani Rohmah Nur Hijjah Bayani Fadhilah Nurdini Awaliyah Nurhasni, N. Reski Mar'af Sariana Harahap Siti Maryam Susi Sumarni Tri Heru Prihadi Yulyani Nur Azizah Yunasfi Yunasfi

Title

Found 16 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 16 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 16 Documents
Search