scholarly journals BEBERAPA SENYAWA NON AROMATIS DARI DAUN ANDALAS (Morus macroura Miq.)

2015 ◽  
Vol 1 (1) ◽  
pp. 79
Author(s):  
Yelmida A.
Keyword(s):  
Infrared Spectroscopy ◽  
Thin Layer ◽  
Ethyl Acetate ◽  
Mass Spectroscopy ◽  
13C Nmr ◽  
Aromatic Compounds ◽  
Solvent Polarity ◽  
Wax Ester ◽  
Aliphatic Ester ◽  
Long Chain

 ABSTRACT Several non aromatic compounds of the leaf Morus macroura Miq. as the rare Indonesian plant has been extracted using n-hexane as an extractant. The soxletation technique was applied in this extraction. The result are separated by fractionation methods of the liquid vacuum chromatographic and continued with the column gravitation chromatographic. The eluent are n-hexane-ethyl acetate are used in the separation method, based on principles of solvent polarity step by step. These separation was monitoring by  thin layer chromatographic. The identification result by spectroscopy ultraviolet, infrared spectroscopy, mass spectroscopy, 1H-NMR  and   13C-NMR , are four compounds found such as hidroxy tridecanil eicosanoic m.p.67-69 oC, long chain n-alkane m.p. 61-62 oC, long chain aliphatic ester m.p. 65-66 oC and wax ester ketone m.p. 68-70oC. Keywords: non aromatic compound, chromatograhphic

scholarly journals Phytochemical Investigation of the Aerial Part of Iraqi Convolvulus arvensis

2020 ◽  
Vol 29 (2) ◽  
pp. 62-69
Author(s):  
Mustafa H. Alwan ◽  
Maha N. Hamad
Keyword(s):  
Liquid Chromatography ◽  
Thin Layer ◽  
Ethyl Acetate ◽  
Thin Layer Chromatography ◽  
Mass Spectroscopy ◽  
Morning Glory ◽  
Convolvulus Arvensis ◽  
Aerial Parts ◽  
Phytochemical Investigation ◽  
Layer Chromatography

  Convolvulus arvensis is a species of bindweed that is rhizomatous and is in the morning glory family (Convolvulaceae) native to Europe and Asia. The plant is naturally grown in Iraq. The plant was reported to be used in traditional medicine from as early as 1730s. The Aerial parts of Convolvulus arvensis were macerated in 80% ethanol for 6 days. The concentrated extract was partitioned with n-hexane, chloroform, ethyl acetate- and n-butanol successively. The n-hexane and ethyl acetate, fractions were examined for the presence of phytochemicals by thin layer chromatography and high performance liquid chromatography and its steroid and flavonoid contents were investigated. Stigmasterol was isolated from n-hexane fraction and identified by liquid chromatography/mass spectroscopy. Rutin was isolated from the ethyl acetate fraction and identified by liquid chromatography/mass spectroscopy. The aim is to examine the phytochemical constituents of the aerial parts of Convolvulus arvensis, literature survey available so far revealed that there were no studies about the phytochemical investigation for Convolvulus arvensis in Iraq.  Different chromatographic techniques like Thin Layer Chromatography and mass spectroscopy were used and the presence of Stigmasterol and Rutin in aerial parts of Convolvulus arvensis was indicated.  

Sterols produced by Cryptotnonas ovata var. palustris

1968 ◽  
Vol 14 (8) ◽  
pp. 837-839 ◽  
Author(s):  
R. P. Collins ◽  
K. Kalnins
Keyword(s):  
Infrared Spectroscopy ◽  
Melting Point ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Mass Spectroscopy ◽  
Layer Chromatography

Cholesterol and stigmasterol were isolated from C. ovata var. palustris. The compounds were identified by thin-layer chromatography, mass spectroscopy, infrared spectroscopy, derivative formation, and melting point determinations.

scholarly journals Antioxidant Activity of Daemonorops draco Resin

2019 ◽  
Vol 22 (5) ◽  
pp. 179-183 ◽  
Author(s):  
Sri Purwanti ◽  
Wulan Tri Wahyuni ◽  
Irmanida Batubara
Keyword(s):  
Antioxidant Activity ◽  
Infrared Spectroscopy ◽  
Thin Layer ◽  
Ethyl Acetate ◽  
Thin Layer Chromatography ◽  
Column Chromatography ◽  
Ethyl Acetate Extract ◽  
Preparative Thin Layer Chromatography ◽  
Layer Chromatography

Jernang resin is secretion of jernang rattan (Daemonorops draco, Arecaceae family) fruits which is endemic in Southeast Asia. This resin has various biological activities and empirically used as wound healing, headache medicines, and fever remedies by Anak Dalam ethnic group from Jambi. This study was performed to evaluate the antioxidant activity of nonpolar fraction of D. draco resin which collected from Jambi Province, Sumatera, Indonesia. Resin was extracted with n-hexane, ethyl acetate, and methanol respectively. The antioxidant properties of the extracts were then evaluated using 1,1-diphenyl-2picryl-hidrazyl radical scavenging assay. The most active extract was further fractionated using n-hexane and methanol and separated using column chromatography and preparative thin layer chromatography. Separation of the extract was conducted through antioxidant assay-guided fractionation. Characterization of the active fraction was carried out by infrared spectroscopy. The result shows that ethyl acetate extract provides higher antioxidant activity (IC50 = 27.61 µg/mL) compare to methanol and n-hexane extracts. N-hexane fraction of ethyl acetate extract used for further separation using column and preparative thin layer chromatography due to its antioxidant activity. Separation using column chromatography resulting in 9 fractions (F.1-9). Fraction F.5 provide high antioxidant activity (IC50 = 17.27 µg/mL) and further separated using preparative thin layer chromatography resulting two fractions with lower antioxidant activity F.5.1 (IC50 = 85.18 µg/mL) and F.5.2 (IC50 = 34.94 µg/mL). Characterization of fraction F.5.2 using infrared spectroscopy showed that component in fraction F.5.2 contains NH-substituted benzene.

scholarly journals Synthesis of the Guanidine Derivative: N-{[(7-(4,5-Dihydro-1H-imidazol-2-yl)-2-(p-tolyl)-6,7-dihydro-2H-imidazo[2,1-c][1,2,4]triazol-3(5H)-ylidene)amino](phenylamino)methylene}benzamide

Molbank ◽  
10.3390/m1246 ◽  
2021 ◽  
Vol 2021 (3) ◽  
pp. M1246
Author(s):  
Łukasz Balewski ◽  
Anita Kornicka
Keyword(s):  
Infrared Spectroscopy ◽  
Elemental Analysis ◽  
13C Nmr ◽  
1H And 13C Nmr ◽  
Guanidine Derivative

The guanidine derivative N-{[(7-(4,5-dihydro-1H-imidazol-2-yl)-2-(p-tolyl)-6,7-dihydro-2H-imidazo[2,1-c][1,2,4]triazol-3(5H)-ylidene)amino](phenylamino)methylene}benzamide (3) has been obtained by the reaction of one measure of N-{[7-(4,5-dihydro-1H-imidazol-2-yl)-2-(p-tolyl)-6,7-dihydro-2H-imidazo[2,1-c][1,2,4]triazol-3(5H)-ylidene]carbamothioyl}benzamide (2) with one measure of aniline in the presence of mercury(II) chloride and triethylamine in anhydrous dimethylformamide. The structure of product 3 was confirmed by 1H and 13C-NMR, infrared spectroscopy, and elemental analysis.

Direct Fluorescent Detection of Organothiophosphorus Pesticides and Some of Their Sulfur-containing Breakdown Products After Thin Layer Chromatography

1967 ◽  
Vol 50 (5) ◽  
pp. 1088-1098
Author(s):  
Mohamed Tawfik H Ragab
Keyword(s):  
Thin Layer ◽  
Ethyl Acetate ◽  
Thin Layer Chromatography ◽  
Ultraviolet Light ◽  
Congo Red ◽  
Fluorescent Detection ◽  
Bromine Vapor ◽  
Layer Chromatography ◽  
Sulfur Containing ◽  
Dark Blue

Abstract A rapid, simple, convenient, and widely applicable method for the direct fluorescent detection of organothiophosphorus pesticides and some postulated breakdown products of these compounds is presented. The coinpounds were spotted on thin layer chromatographic sheets, developed in ethyl acetate :nhexane, and made visible by exposure to bromine vapor followed by spraying with ferric chloride and 2-(o-hydroxy phenyl) benzoxazole. Of the 47 compounds tested, 32 compounds produced fluorescent blue spots vinder longwave ultraviolet light; these consisted of 25 organothiophosphorus pesticides, 5 sulfur-containing breakdown products, and phosphoric and hypophosphorous acids. A superimposed Congo red spray destroyed the fluorescence and resulted in dark blue spots against a red backgrovind. The sensitivity of this method is in the range of 0.2 to 5.0 μg, depending on the specific compound.

Specific detection of aromatic compounds containing sulphur and thiazole compounds on thin-layer chromatographic plates

The Analyst ◽  
1972 ◽  
Vol 97 (1160) ◽  
pp. 889 ◽  
Author(s):  
M. S. Bhatia ◽  
K. L. Bajaj ◽  
Simran Singh ◽  
I. S. Bhatia
Keyword(s):  
Thin Layer ◽  
Aromatic Compounds ◽  
Specific Detection

Infrared spectroscopy of highk thin layer by multiple internal reflection and attenuated total reflection

2003 ◽  
Vol 0 (8) ◽  
pp. 2961-2965 ◽  
Author(s):  
N. Rochat ◽  
K. Dabertrand ◽  
V. Cosnier ◽  
S. Zoll ◽  
P. Besson ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Thin Layer ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Internal Reflection

The effect of protic solvents in the conversion of lignin from Earleaf Acacia tree

2021 ◽  
Vol 11 (1) ◽  
pp. 123-126
Author(s):  
Khoa Phung Thanh ◽  
Khanh Vu Bao ◽  
Phat Huynh Van ◽  
Truc Nguyen Kim ◽  
An Tran Nguyen Minh ◽  
...  
Keyword(s):  
Aromatic Compounds ◽  
Solvent Polarity ◽  
Pulp Industry ◽  
Protic Solvents ◽  
Renewable Feedstock ◽  
Bulk Chemical ◽  
Paper And Pulp ◽  
Paper And Pulp Industry ◽  
Main Components ◽  
Acacia Tree

Lignin is one of main components of lignocellulosic along with cellulose and hemicellulose. It is a by-product of the paper and pulp industry, and has aromatic backbones making them an ideal renewable feedstock of aromatic compounds for a range of applications. Catalytic conversion of lignin from Earleaf Acacia tree was performed using high pressure/temperature reactor with Ru/C catalyst and protic solvents. The results showed that the conversion of lignin depends on the solvent polarity of protic solvents, and Ru/C catalyst enhanced the lignin conversion. Phenolic compounds are the main components of lignin conversion. Those compounds can be applied as a basement for bulk chemical and fuels.

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