scholarly journals ANALISIS SIFAT OPTIK KLOROFIL PADA EKSTRAK DAUN MENGGUNAKAN UV-VIS SPEKTROMETER SEBAGAI STUDI AWAL APLIKASI DYE SENSITIZER

2018 ◽  
Vol 3 (2) ◽  
pp. 101-104
Author(s):  
Dona Dianisya ◽  
Amalia Dini Silmina ◽  
Novan Purwanto ◽  
Isnaeni Isnaeni ◽  
Iwan Sugihartono
Keyword(s):  
Acetic Acid ◽  
Visible Light ◽  
Ultraviolet Light ◽  
Leaf Extract ◽  
Carica Papaya ◽  
Ricinus Communis ◽  
Ultrasonic Test ◽  
Uv Absorption ◽  
Light Spectrum ◽  
Spinach Leaf

ABSTRAK Telah dilakukan studi ekstraksi awal klorofil dari 3 jenis daun yaitu daun bayam (Amarantus), daun pepaya (Carica papaya), dan daun jarak (Ricinus communis). Ekstraksi dilakukan dengan teknik penghancuran menggunakan blender. Pelarut yang digunakan adalah isopropanol, asam asetat, dan DI water. Hasil penyaringan ekstrak daun diperoleh larutan sebayak 75 ml untuk setiap larutan ekstrak klorofil. Uji Ultrasonic Visible memberikan konfirmasi adanya penyerapan di rentang cahaya ultraviolet dan cahaya tampak. Sementara itu, serapan klorofil teramati di rentang cahaya tampak. Apabila dibandingkan serapan UV dan cahaya tampak, pada larutan ekstrak masih mengandung banyak gugus asam dibandingkan klorofil yang di ekstrak. Kata-kata kunci: daun bayam, daun pepaya, daun jarak, absorbansi, klorofil ABSTRACT We studied for chlorophyll extract from 3 leaf types that are spinach leaf (Amarantus), papaya leaf (Carica papaya), and castor leaf (Ricinus communis). The extraction is done by using a blender. The solvents used are isopropanol, acetic acid, and DI water. The result of leaf extract was obtained 75 ml solution for each solution of chlorophyll extract. The Visible Ultrasonic Test confirms absorption in the range of ultraviolet light and visible light. Meanwhile, chlorophyll uptake is observed in the visible light spectrum. When compared to UV absorption and visible light, in the extract solution still contains a lot of acid groups than the chlorophyll extracted. Keywords: spinach leaf, papaya leaf, Castor leaf, absorbance, chlorophyll.

Phytochemical, hematologic and anti-tumor activity evaluations of Carica papaya leaf extract

2017 ◽  
Vol 3 (3) ◽  
Author(s):  
Hoang Nguyen ◽  
Joseph P Kitzmiller ◽  
Pooja Khungar ◽  
Narendra Dabbade ◽  
Kieu Tho Nguyen ◽  
...  
Keyword(s):  
Leaf Extract ◽  
Carica Papaya ◽  
Anti Tumor Activity

Analgesic Effectivty Of Nanoparticles Chitosan-Ethanol Leaf Extract Papaya (Carica Papaya L.) In White Male Mice (Mus Mucculus)

2017 ◽  
Vol 15 (2) ◽  
pp. 228
Author(s):  
Juliferd Gredi ◽  
Wintari Taurina ◽  
Mohamad Andrie
Keyword(s):  
Leaf Extract ◽  
Carica Papaya ◽  
White Male ◽  
Ethanol Extract ◽  
Test Method ◽  
Ionic Gelation ◽  
Male Mice ◽  
Writhing Test ◽  
Effi Ciency ◽  
Optimal Formula

Papaya leaves has been shown to have efficacy as an analgesic. Analgesic effect caused by the flavonoids in leaves of papaya. To enhance the analgesic effi cacy papaya into dosage formulatio of nanoparticles. The purpose of this research was to create and characterized nanoparticles from ethanol extract of papaya leaves then tested for effectiveness as an analgesic. This study used polymer chitosan and NaTPP to created nanoparticles through ionic gelation method and analgesic activity tested using writhing test method and statistical tested. Optimal formula of nanoparticles were produced at concentration of 0.2% chitosan, Na-TPP extract 0.1% and 4% with a ratio of 6: 1: 1. The nanoparticles was formed a size of 255.4 nm with polidispers index of 0.7, the zeta potential of + 11,1mV, the adsorption effi ciency by 87% and rounded morphology (spherical). Analgesic effectiveness tested by comparison between the groups ethanol extract of papaya and the groups nanoparticles of chitosan-ethanol extract papaya statistically using the T-test Independent. The results of this research indicate that there are statistically signifi cant differences (p <0.05). This results shows that the preparation nanoparticles of chitosan-ethanol extract papaya is more effective as an analgesic than the ethanol extract of papaya leaves.

scholarly journals Photocatalytic Activity and Characterization of Carbon-Modified Titania for Visible-Light-Active Photodegradation of Nitrogen Oxides

2012 ◽  
Vol 2012 ◽  
pp. 1-13 ◽  
Author(s):  
Chun-Hung Huang ◽  
Yu-Ming Lin ◽  
I-Kai Wang ◽  
Chun-Mei Lu
Keyword(s):  
Visible Light ◽  
Carbon Number ◽  
Red Light ◽  
Matrix Material ◽  
Carbon Sources ◽  
Impregnation Method ◽  
Light Spectrum ◽  
Precursor Molecule ◽  
Visible Light Active ◽  
Carbonate Species

A variety of carbon-modified titania powders were prepared by impregnation method using a commercial available titania powder, Hombikat UV100, as matrix material while a range of alcohols from propanol to hexanol were used as precursors of carbon sources. Rising the carbon number of alcoholic precursor molecule, the modified titania showed increasing visible activities ofNOxphotodegradation. The catalyst modified with cyclohexanol exhibited the best activities of 62%, 62%, 59%, and 54% for the totalNOxremoval under UV, blue, green, and red light irradiation, respectively. The high activity with long wavelength irradiation suggested a good capability of photocatalysis in full visible light spectrum. Analysis of UV-visible spectrum indicated that carbon modification promoted visible light absorption and red shift in band gap. XPS spectroscopic analysis identified the existence of carbonate species (C=O), which increased with the increasing carbon number of precursor molecule. Photoluminescence spectra demonstrated that the carbonate species suppressed the recombination rate of electron-hole pair. As a result, a mechanism of visible-light-active photocatalyst was proposed according to the formation of carbonate species on carbon-modified TiO2.

scholarly journals Plant holo-(acyl carrier protein) synthase

1988 ◽  
Vol 252 (1) ◽  
pp. 39-45 ◽  
Author(s):  
S A Elhussein ◽  
J A Miernyk ◽  
J B Ohlrogge
Keyword(s):  
Spinacia Oleracea ◽  
Acyl Carrier Protein ◽  
Ricinus Communis ◽  
Plant Cells ◽  
Gel Permeation Chromatography ◽  
Carrier Protein ◽  
Improved Method ◽  
Ph Optimum ◽  
Spinach Leaf

1. An improved method was developed for the assay of plant holo-(acyl carrier protein) synthase activity, using Escherichia coli acyl-(acyl carrier protein) synthetase as a coupling enzyme. 2. Holo-(acyl carrier protein) synthase was partially purified from spinach (Spinacia oleracea) leaves by a combination of (NH4)2SO4 fractionation and anion-exchange and gel-permeation chromatography. 3. The partially purified enzyme had a pH optimum of 8.2 and Km values of 2 microM, 72 microM and 3 mM for apo-(acyl carrier protein), CoA and Mg2+ respectively. Synthase activity was inhibited in vitro by the reaction product 3′,5′-ADP. 4. Results from the fractionation of spinach leaf and developing castor-oil-seed (Ricinus communis) endosperm cells were consistent with a cytosolic localization of holo-(acyl carrier protein) synthase activity in plant cells.

Photocatalytic degradation of acetic acid in the presence of visible light-active TiO 2 -reduced graphene oxide photocatalysts

2017 ◽  
Vol 280 ◽  
pp. 108-113 ◽  
Author(s):  
A.W. Morawski ◽  
E. Kusiak-Nejman ◽  
A. Wanag ◽  
J. Kapica-Kozar ◽  
R.J. Wróbel ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Graphene Oxide ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Reduced Graphene Oxide ◽  
Reduced Graphene ◽  
Visible Light Active

scholarly journals Rare earth oxynitrides: Promising visible-light-driven photocatalysts for water splitting

2021 ◽  
Author(s):  
Shijia Jiang ◽  
Yanxin Liu ◽  
Jun Xu
Keyword(s):  
Rare Earth ◽  
Visible Light ◽  
Water Splitting ◽  
Ultraviolet Light ◽  
Energy Crisis ◽  
Potential Solution ◽  
Global Energy ◽  
Ultraviolet Light Irradiation ◽  
Visible Light Driven ◽  
Main Component

Photocatalytic water splitting is a potential solution for global energy crisis. However, most photocatalysts only respond to ultraviolet light irradiation, which is not the main component of sunlight. The photocatalysis...

Enhancing functionalities of organic ultraviolet-visible phototransistors incorporating spiropyran-merocyanine photochromic materials

2021 ◽  
Vol 9 (39) ◽  
pp. 22522-22532
Author(s):  
Ren-Jie Wu ◽  
Yueh-Ling Hsu ◽  
Wei-Yang Chou ◽  
Horng-Long Cheng
Keyword(s):  
Visible Light ◽  
Energy Saving ◽  
Ultraviolet Light ◽  
Photochromic Materials

A photoexcited merocyanine molecule triggers several distinct photoresponse features of organic phototransistors, enabling distinction between ultraviolet light and visible light and realising an energy-saving optical synapse.

scholarly journals Effect of Carica papaya (Linn) aqueous leaf extract on pharmacokinetic profile of ciprofloxacin in rabbits

2017 ◽  
Vol 16 (1) ◽  
pp. 127 ◽  
Author(s):  
Grace E. Ukpo ◽  
Mbang A. Owolabi ◽  
Ngozi O.A. Imaga ◽  
Oluwafunke O. Oribayo ◽  
Akpobomen J. Ejiroghene
Keyword(s):  
Leaf Extract ◽  
Carica Papaya ◽  
Pharmacokinetic Profile ◽  
Aqueous Leaf Extract
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