Removal of ethyl acetate in air by using different types of corona discharges generated in a honeycomb monolith structure coated with Pd/γ-alumina

2021 ◽  
pp. 126162
Author(s):  
Van Toan Nguyen ◽  
Duc Ba Nguyen ◽  
Young Sun Mok ◽  
Md. Mokter Hossain ◽  
Shirjana Saud ◽  
...  
Keyword(s):  
Ethyl Acetate ◽  
Corona Discharges ◽  
Different Types ◽  
Honeycomb Monolith

scholarly journals Antioxidant, Anti-Diabetic and Phytochemical Screening of Dried Ficus carica Linn Fruit Powder

2020 ◽  
Vol 2 (1) ◽  
pp. 50
Keyword(s):  
Ethyl Acetate ◽  
Phenolic Content ◽  
Ethyl Acetate Extract ◽  
Total Phenolic ◽  
Total Flavonoid Content ◽  
Phytochemical Screening ◽  
Flavonoid Content ◽  
Dpph Assay ◽  
Ic50 Value ◽  
Different Types

Ficus carica L. or the common name is red figs that belong to the Moraceae family or the Mulberry family. Every part of the fruit or the tree has been able to treat different types of common diseases, for example, it is used as a natural laxative or a supplementary food for diabetes. Thus, this research uses four different solvents, ethyl acetate, ethanol, hexane, and water, to obtain the respective crude extracts in order to investigate the anti-diabetic properties by determining the inhibition of the activity of the diabetic enzymes, α-amylase, and α-glucosidase; and the DPPH assay determines the antioxidant activity while qualitative phytochemical screening was for phenols, alkaloids, tannins, saponins, and flavonoids; total quantitative phenolic and total flavonoid content was done. The phytochemical screening showed the presence of the compounds tested in different types of crude extracts. For the total phenolic content, ethyl acetate extract exhibits the highest content. In contrast, hexane extract shows the highest total flavonoid content. For the DPPH assay, ethyl acetate extract has the highest scavenging activity at 13.351 µg/mL with corresponding with the data of total phenolic content. For the α-glucosidase inhibitory activity, water extract has the lowest IC50 value among the four extracts but higher value than the standard. For α-amylase inhibitory activity, only ethanol extract showed the IC50 value, but it was a high value. In conclusion, there is potential for figs to be a natural source of medicine, and the extracts tested can be used for future studies.

scholarly journals Extraction of the Metabolites from Medicinal plant Euphorbia leaf

2021 ◽  
Vol 37 (5) ◽  
pp. 1257-1261
Author(s):  
Uday M. Muddapur ◽  
Aejaz A. Khan ◽  
Amal Bahafi ◽  
S. M. Shakeel Iqubal ◽  
Abdul Rahman Ikbal ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Medicinal Plant ◽  
Ethyl Acetate ◽  
Leaf Extract ◽  
Research Work ◽  
Leaf Extracts ◽  
Different Types ◽  
Phytochemical Contents ◽  
Ethyl Acetate Extracts

The antimicrobial, phytochemical contents of extracts obtained from the leaf extract of mature Euphorbia pilulifera (E. pilulifera) were examined in this research work. Using ethyl acetate extracts of the leaves of Euphorbia pilulifera, phytochemical metabolites were studied. Further using chromatography, different components were separated and its antimicrobial activity was studied. Different types of bacterial organisms were used for evaluating the antimicrobial activity. The results indicated that leaf extracts are more sensitive towards organisms. Thus the presence of phytochemicals in the leaf extract can be used for the treatment of different diseases.

scholarly journals FORMULATION AND EVALUATION OF ANTIMICROBIAL OINTMENTS FROM EUPATORIUM GLANDULOSUM HORT. EX KUNTH

2019 ◽  
pp. 224-228
Author(s):  
SILPA M ◽  
SURESH JOGHEE ◽  
HAMSALAKSHMI
Keyword(s):  
Antimicrobial Activity ◽  
Ethyl Acetate ◽  
Folk Medicine ◽  
Significant Activity ◽  
Zone Of Inhibition ◽  
Plant Materials ◽  
Different Types ◽  
Soxhlet Method ◽  
Alcohol Ethyl

Objective: The present study was undertaken to evaluate the antimicrobial activity of an ointment prepared from alcohol, ethyl acetate, and chloroform extracts of Eupatorium glandulosum Hort. ex Kunth. Methods: The dried plant materials of E. glandulosum were individually extracted using alcohol, ethyl acetate, and chloroform by Soxhlet method. These three different types of extracts were used for the preparation of ointment and evaluated for the phytochemicals, pH, homogeneity, spreadability, tube extrudability, stability, and antimicrobial activity. The activity of prepared ointments was evaluated against Escherichia coli and Bacillus subtilis and the in vitro antimicrobial activity of ointments of plant extracts was performed by cup plate methods. The most effective antimicrobial ointment was determined by comparing the results of the zone of inhibition of all the ointments of each solvent extract. Results: The antimicrobial activity of optimized formulation was showed significant activity against the tested bacterial pathogens. Conclusion: The present study confirmed the antimicrobial activity of the formulations. Furthermore, it can use as a potential dosage form for clinical utility. The results are the justification for the use of the plant in folk medicine.  

scholarly journals ISOLATION AND IDENTIFICATION OF SECONDARY METABOLIT COMPOUNDS IN ETIL ASETIC FRACTIONS ON MINDI LEAF

2019 ◽  
Vol 23 (2) ◽  
pp. 95-102
Author(s):  
Nurul Lutfia ◽  
Sri Atun
Keyword(s):  
Secondary Metabolites ◽  
Ethyl Acetate ◽  
Ethanol Extract ◽  
Ethyl Acetate Fraction ◽  
Polar Fraction ◽  
Melia Azedarach ◽  
Base Peak ◽  
Isolation And Identification ◽  
Different Types ◽  
Dendrophthoe Falcata

This study was aimed at isolating and identifying secondary metabolites contained in the ethyl acetate fraction of parasitic leaves (Dendrophthoe falcata (L.f)) Ettingsh which attaches to the stem of Mindi plants (Melia azedarach). The subjects in this study were leaves of parasitic plants on Mindi plants. While the objects in this study were secondary metabolites from the ethyl acetate fraction of the leaves of parasite plants attached to the mindi plant. The research method was carried out by extracting macerated leaves of D. falcata with ethanol solvents. The ethanol extract obtained was partitioned using n-hexane, chloroform, and ethyl acetate. Ethyl acetate fraction was separated by gravity column chromatography (CCG). The relatively non-polar fraction that has shown a single stain is tested for purity using 3 different types of solvents and identified using UV-Vis, IR, and GC-MS. The results showed that the compounds that could be isolated and identified from the relatively non-polar ethyl acetate fraction of D. falcata leaves were stigmast-5-en-3β-ol with an abundance of 6.49%, having a molecular weight of m / z 414 with base peak 55. Compounds sterols are compounds commonly found in parasitic plantsISOLASI DAN IDENTIFIKASI SENYAWA METABOLIT SEKUNDER PADA FRAKSI ETIL ASETAT DAUN MINDIPenelitian ini bertujuan untuk mengisolasi dan mengidentifikasi senyawa metabolit sekunder yang terdapat dalam fraksi etil asetat daun benalu (Dendrophthoe falcata (L.f)) Ettingsh yang menempel pada batang tumbuhan Mindi (Melia azedarach). Subjek dalam penelitian ini adalah daun tumbuhan benalu pada tanaman mindi. Sedangkan objek dalam penelitian ini adalah senyawa metabolit sekunder dari fraksi etil asetat daun tumbuhan benalu yang menempel pada tanaman mindi. Metode penelitian dilakukan dengan ekstraksi maserasi daun D. falcata dengan pelarut etanol. Ekstrak etanol yang diperoleh dipartisi menggunakan n-heksana, kloroform, dan etil asetat. Fraksi etil asetat dipisahkan secara kromatografi kolom gravitasi (KKG). Fraksi relatif non polar yang sudah menunjukkan noda tunggal diuji kemurniannya menggunakan 3 jenis pelarut yang berbeda dan diidentifikasi menggunakan UV-Vis, IR, dan GC-MS. Hasil penelitian menunjukkan senyawa yang dapat diisolasi dan diidentifikasi dari fraksi etil asetat relatif nonpolar daun D. falcata adalah stigmast-5-en-3β-ol dengan kelimpahan 6,49 %, memiliki berat molekul m/z 414 dengan base peak 55. Senyawa sterol merupakan senyawa yag lazim ditemukan dalam tumbuhan benalu.  

scholarly journals The Phytochemical Screening and Antioxidants Potential of Schoenoplectus triqueter L. Palla

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Amir Hassan ◽  
Zakaria Akmal ◽  
Nawaz Khan
Keyword(s):  
Ethyl Acetate ◽  
Inhibitory Concentration ◽  
Ethyl Acetate Extract ◽  
Biological Activities ◽  
Continuous Process ◽  
Extraction Process ◽  
Dilution Method ◽  
Successive Extraction ◽  
Different Types ◽  
Phytochemical Constituents

Over the centuries, humans use different types of therapeutic plants to treat several diseases. Cyperaceae family has a significant number of monocotyledon plants, and Schoenoplectus is one of the genera that belong to this family; about forty-nine compounds are isolated. Our current study was evaluated on Schoenoplectus triqueter L. Palla to show the potential of its antioxidants and confirm the phytochemical constituents in this plant species. Fully powdered plant taken for successive extraction process in hot continuous process for Soxhlet was 20 g plant in porous bag manually prepared; the constant temperature provided was 40–50°C. In the maceration extraction method, 30 g plant was taken in a closed jar and the solvent placed for extraction was 300 mL of ethanol; the extract gets filtered and fractioned to different solvents such as water, dichloromethane, ethyl acetate, and n-hexane fraction. Important types of phytochemicals found in this species are alkaloids, proteins, amino acids, flavonoids, phenols, terpenoids, tannins, saponins, and carbohydrates. All the entire extracted fractions which are water, dichloromethane, ethyl acetate, and n-hexane possess noticeable activity at various concentrations of 31.25, 62.5, 125, 250, and 500 µg/mL by the dilution method. The ethyl acetate extract holds greater median inhibitory concentration (IC50 = 3.52 ± 0.01), and water showed IC50 = 3.61 ± 0.01 percent potential as compared to the standard ascorbic acid which possesses IC50 = 2.27 ± 0.01. Their potential may be enhanced or lowered with the purification of extracts which might be useful in biological activities.

scholarly journals CHROMATOGRAPHIC STUDIES ON BIOACTIVE COMPOUNDS OF ETHANOLIC LEAF EXTRACT OF AERVA LANATA BY HIGH PERFORMANCE THIN LAYER CHROMATOGRAPHY TECHNIQUE

2017 ◽  
Vol 10 (6) ◽  
pp. 340
Author(s):  
Lucia Sounder ◽  
Victor Arockia Doss
Keyword(s):  
Thin Layer ◽  
Formic Acid ◽  
Ethyl Acetate ◽  
Bioactive Compounds ◽  
High Performance ◽  
Ethanolic Extract ◽  
Different Types ◽  
Rf Values ◽  
Aerva Lanata ◽  
Layer Chromatography

 Objective: This study was designed to determine the bioactive compounds such as alkaloids, glycosides, phenol, and tannins by high performance thin layer chromatography (HPTLC) which will help in crude drug identification and in the standardization of Aerva lanata in pharmacological industries. Methods: HPTLC studies were conducted as Harborne described. The toluene-acetone-formic acid (4.5:4.5:1); ethyl acetate-ethanol-water (10:1.35:1); ethyl acetate-ethanol-water (8:2:1.2); toluene-ethyl acetate-formic acid-methanol (3:3:0.8:0.2) were employed as mobile phase for phenol, alkaloid, glycoside, and tannin profiles. Result: The ethanolic extract of leaves of A. lanata illustrated the presence of 11 different types of phenol with 11 different Rf values with range 0.06- 0.95, 10 different types of alkaloid with 10 different Rf values from 0.02 to 0.92, 12 different types of glycoside with 12 different Rf values from 0.02 to 0.96, 9 different types of Tannin with 9 different Rf values from 0.07 to 0.93. Conclusion: This study supplements valuable information about known and unknown bioactive compounds with the bioactivity of A. lanata. Further, pharmacological studies on structure of the bioactive compounds can be formulated to treat diseases. Thus, the ethanolic extract of A. lanata plant can be utilized as a useful medicinal herb for alleviation of various illness and disorder. 

scholarly journals Storage stability of organophosphorus pesticide residues in peanut and soya bean extracted solutions

2018 ◽  
Vol 5 (7) ◽  
pp. 180757 ◽  
Author(s):  
Gang Guo ◽  
Naiwen Jiang ◽  
Fengmao Liu ◽  
Yanli Bian
Keyword(s):  
Ethyl Acetate ◽  
Pesticide Residues ◽  
Storage Stability ◽  
Organophosphorus Pesticide ◽  
Storage Conditions ◽  
Soya Bean ◽  
Slight Effect ◽  
Different Types ◽  
Lower Temperature ◽  
The Stability

This study was performed to determine the storage stability of organophosphorus pesticide residues in high oil content commodity matrices, peanut and soya bean. The storage conditions included different types of solvents (ethyl acetate, acetone and hexane) and corresponding extracted matrix solutions, light and temperature. It was found that three pesticides degraded quickly especially in ethyl acetate solvent. They decreased greater than 30% when stored for 3 days at −20°C in ethyl acetate; the results showed that the stability could be improved in the extracted matrix solutions. Light had a slight effect for stability of phorate and fenthion, while it played an important effect for disulfoton with the exception of ethyl acetate as solvent. Even at −20°C, exposure to solvents or extracted matrix solution resulted in 40.67, 96.33 and 35.07% loss of phorate, disulfoton and fenthion. Hence, it could be assumed that these three residues could be more stable at lower temperature, in the dark and in acetone or hexane extracted peanut and soya bean solutions.

scholarly journals Inactivation of Schistosoma Using Low-Temperature Plasma

2020 ◽  
Vol 9 (1) ◽  
pp. 32
Author(s):  
Silvie Hejzlarová ◽  
Marta Chanová ◽  
Josef Khun ◽  
Jaroslav Julák ◽  
Vladimír Scholtz
Keyword(s):  
Low Temperature ◽  
Schistosoma Mansoni ◽  
Low Temperature Plasma ◽  
Corona Discharges ◽  
Negative Corona ◽  
Temperature Plasma ◽  
Different Types

The inactivation of Schistosoma mansoni cercariae and miracidia was achieved by exposure to plasma produced by the positive, negative, and axial negative corona discharges. The positive discharge appeared as the most effective, causing the death of cercariae and miracidia within 2–3 min of exposure. The negative discharge was less effective, and the axial discharge was ineffective. The water pre-activated (PAW) by the discharges showed similar efficiency, with the exception of the significantly effective PAW activated with axial discharge. These facts, together with the observation of various reactions among plasma-damaged schistosomes, suggest that the mechanisms of inactivation by different types of discharges are different.

The extinction time of a general birth and death process with catastrophes

1986 ◽  
Vol 23 (04) ◽  
pp. 851-858 ◽  
Author(s):  
P. J. Brockwell
Keyword(s):  
Laplace Transform ◽  
Size Distribution ◽  
Sufficient Conditions ◽  
Necessary And Sufficient Conditions ◽  
Death Process ◽  
Extinction Time ◽  
Birth And Death Process ◽  
Different Types ◽  
The Laplace Transform ◽  
Necessary And Sufficient

The Laplace transform of the extinction time is determined for a general birth and death process with arbitrary catastrophe rate and catastrophe size distribution. It is assumed only that the birth rates satisfyλ0= 0,λj> 0 for eachj> 0, and. Necessary and sufficient conditions for certain extinction of the population are derived. The results are applied to the linear birth and death process (λj=jλ, µj=jμ) with catastrophes of several different types.

Differentiating between different forms of moral obligations

2020 ◽  
Vol 43 ◽  
Author(s):  
Rajen A. Anderson ◽  
Benjamin C. Ruisch ◽  
David A. Pizarro
Keyword(s):  
Moral Character ◽  
Moral Obligations ◽  
Different Types

Abstract We argue that Tomasello's account overlooks important psychological distinctions between how humans judge different types of moral obligations, such as prescriptive obligations (i.e., what one should do) and proscriptive obligations (i.e., what one should not do). Specifically, evaluating these different types of obligations rests on different psychological inputs and has distinct downstream consequences for judgments of moral character.

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