Corrosion inhibition of ethanol extract of Moringa oleifera leaves on aluminium in 1m sulphuric acid solution

2021 ◽  
Vol 1 (1) ◽  
pp. 014-023
Author(s):  
SY Abdurrahman ◽  
UI Gaya ◽  
SA Kwalli ◽  
Y Sa’idu
Keyword(s):  
Functional Groups ◽  
Corrosion Inhibition ◽  
Moringa Oleifera ◽  
Inorganic Compounds ◽  
Ethanol Extract ◽  
Sulphuric Acid Solution ◽  
Leaf Extracts ◽  
Before And After ◽  
Functional Classes ◽  
Aluminum Corrosion

The aim of this research is to use the wet loss method to determine how well Moringa oleifera in H2SO4 inhibits aluminum corrosion. Weight loss was measured before and after corrosion on aluminum coupons with a thickness of 0.15cm, a width of 3cm, and a length of 4cm, all of which were 98 percent pure. Increases in inhibitor concentrations improve inhibition effectiveness, which ranges from 35.29 % to 47.06 % to 64.71 percent to a maximum of 82.35 %, but decreases as temperature and immersion time rise. The inhibition efficiency of the formulation consisting of 1M H2SO4 medium and 0.4g/L inhibition is 82.35 %. This means that the inhibitor is well-adsorbed on the surface of the aluminum metal, resulting in a significant reduction in corrosion rate. As a result, further research into corrosion inhibition should be done with this type of plant. The Langmuir adsorption isotherm (where Gads(kj/mol) is found to be -13.694 and Kads is 13.53) was followed in the adsorption of inhibitor molecules on Aluminum sheet surface. The absorption peaks corresponding to the functional groups – C=O, -C=N, C-OH, and C=C were found in the infrared spectrograph of the leaf extracts. These functional groups may have interacted with the aluminum sheet's surface, preventing oxidation. Organic compounds in the leaf extracts, such as alkaloids, saponins, tannins, and phenolics, were thought to be the source of these functional classes. Green extracts of M. oleifera are recommended for use as corrosion inhibitors against other inorganic compounds. It has a higher inhibitory performance, is readily available, biodegradable, less expensive, and environmentally friendly.

scholarly journals Aktivitas Larvasida Ekstrak Daun Tumih (Combretocarpus rotundatus (Miq.) Danser) terhadap Larva Aedes aegypti

2019 ◽  
Vol 13 (1) ◽  
pp. 77
Author(s):  
Renhart Jemi ◽  
Royda Dara Ertini Damanik ◽  
Lies Indrayanti
Keyword(s):  
Aedes Aegypti ◽  
Ethyl Acetate ◽  
Functional Groups ◽  
Larvicidal Activity ◽  
Methanol Extract ◽  
Ethyl Acetate Extract ◽  
Ethanol Extract ◽  
Hexane Extract ◽  
Leaf Extracts ◽  
Ft Ir

Penelitian ini bertujuan untuk mengukur kadar ekstrak daun tumih dan menguji aktivitas larvasidanya terhadap Aedes aegypti. Daun tumih dimaserasi dan difraksinasi dengan pelarut metanol, n-heksana, etil asetat, dan etanol. Aktivitas larvasida ekstrak diuji dengan konsentrasi 0, 5, 10, 25, 50, 75, dan 100 ppm. Hasil penelitian menunjukkan rendemen dari ekstraksi daun tumih pada berbagai larutan adalah sebagai berikut ekstrak metanol sebesar 15%, n-heksana 51%, etil asetat 35% dan etanol 85%. Hasil uji fitokimia menunjukkan bahwa ekstrak metanol daun tumih positif mengandung senyawa alkaloid, flavonoid, saponin, dan tanin. Pengujian larvasida ekstrak daun tumih menunjukkan pengaruh terhadap mortalitas larva Aedes aegypti. Aktivitas larvasida ekstrak daun tumih optimum pada ekstrak etil asetat dengan LC(50) = 24,54 ppm, ekstrak metanol LC(50) = 45,65 ppm, ekstrak etanol LC(50) = 46,77 ppm dan ekstrak n-heksana LC(50) = 48,97 ppm. Ekstrak etil asetat daun tumih merupakan ekstrak teraktif dalam aktivitas larvasidanya. Selanjutnya, analisis FT-IR menunjukkan adanya gugus fungsi C-H alkana dan C = C aromatik. Gugus fungsi tersebut diduga penyusun senyawa alkaloid, flavanoid, saponin, dan tanin. Hasil analisis LCMS mengindikasikan adanya 7 senyawa bioaktif yaitu hexadecyl-ferulate, 21-o-methyl toosendanopentaol, 23-acetate alismaketone, dehydroxy-24-acetate alisol, physanol, prosapogenin 2, dan stigmastan-3,6-dione Larvacide Activity of Tumih (Combretocarpus rotundatus (Miq.)Danser) Leaf Extracts against Aedes aegyptiAbstractThis research aimed to measure the content of Combretocarpus Rotundatus (Miq.) Danser leaf extracts and to test its larvicidal activity against Aedes aegypti. The leaves were macerated and fractionated using methanol, n-hexane, ethyl acetate, and ethanol. The extract contents from the leaves extraction were metanol extract of 15%, n-hexane extract of 51%, ethyl acetate extract of 35% and ethanol extract of 85%. The larvicidal activity of extracts was tested with concentration of 0, 5, 10, 25, 50, 75, and 100 ppm. Phytochemicals test exhibited that the methanol extract of Combretocarpus rotundatus (Miq.) Danser leaves contained alkaloids, flavonoids, saponins, and tannins. Larvicidal test conducted on the extracts exhibited an effect on the mortality levels against Aedes aegypti larvae. The larvicidal activity of leaf extracts was optimum in the ethyl acetate extract at LC(50) = 24.54 ppm, methanol extract at LC(50) = 45.65 ppm, ethanol extract at LC(50) = 46.77 ppm, and n-hexane extract at LC(50 = 48.97 ppm. It was found that the ethyl acetate extract was the most active larvicide. FT-IR analysis showed existing functional groups of C-H alkanes and C=C aromatics. Those functional groups were assumed to be flavanoid, alkaloid, saponin, and tannin constituents. Results of LC-MS analysis indicated 7 bioactive compounds i.e.hexadecyl-ferulate, 21-o-methyl toosendanopentaol, 23-acetate alismaketone, dehydroxy-24-acetate alisol, prosapogenin 2, and stigmastan-3,6- dione.

scholarly journals GC–MS analysis and antibacterial activities of Moringa oleifera leaf extracts on selected clinical bacterial isolates

2021 ◽  
Vol 45 (1) ◽  
Author(s):  
Kingsley Erhons Enerijiofi ◽  
Funmilayo Hannah Akapo ◽  
Joseph Omorogiuwa Erhabor
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Pathogenic Bacteria ◽  
Moringa Oleifera ◽  
Ethanol Extract ◽  
Mass Spectrometry Analysis ◽  
Gas Chromatography Mass Spectrometry ◽  
Bacterial Isolates ◽  
Leaf Extracts ◽  
Chromatography Mass Spectrometry

Abstract Background Man has a long history of utilizing herbal preparations to treat infections. Therefore, this study aimed to investigate the quantitative phytochemical components, gas chromatography–mass spectrometry analysis, and the antibacterial properties of the aqueous and ethanol leaf extracts of Moringa oleifera on some clinical bacterial isolates. Results Aqueous and ethanol extractions from Moringa oleifera yielded 40.75% and 62.87%, respectively. Flavonoid (20.76 mg/100 g) was the highest, while saponin (2.00 mg/100 g) was the least of all phytochemicals detected. The proximate nutrient composition revealed that carbohydrate (46.59%) had the highest, while lipid (7.37%) was the least. Eleven compounds were detected in both extracts by gas chromatography–mass spectrometry. The eleven compounds identified had higher concentrations in the ethanol extract except 2-octenoic (26.09 mg/kg) acid and 1, 2-epoxyhexadecane (8.84 mg/kg) in aqueous extract which were considerably higher than 0.62 mg/kg and < 0.01 mg/kg in ethanol extract. The minimum inhibitory concentration and minimum bactericidal concentration were 6.25 mg/ml against the test organisms for ethanol extract. Conclusion The antibacterial activity of the ethanol extract was more active against the bacterial isolates than the aqueous, which increased as the extract concentration increases. The reports revealed that Moringa oleifera is an all-important herb that can inhibit infections from the studied pathogenic bacteria isolates.

scholarly journals Extraction and Fractionation Effects on Antiplasmodial Activity and Phytochemical Composition of Palicourea hoffmannseggiana

2021 ◽  
Vol 8 (01) ◽  
pp. e34-e42
Author(s):  
Leticia Hiromi Ohashi ◽  
Douglas Costa Gontijo ◽  
Maria Fernanda Alves do Nascimento ◽  
Luciano Ferreira Margalho ◽  
Geraldo Célio Brandão ◽  
...  
Keyword(s):  
Growth Inhibition ◽  
Scale Up ◽  
Indole Alkaloid ◽  
Ethanol Extract ◽  
Parasite Growth ◽  
In Vitro Activity ◽  
Acid Base ◽  
Leaf Extracts ◽  
Leaf Powder

AbstractThe present study on Palicourea hoffmannseggiana, which was collected at Marapanim, state of Pará, Brazil, comprises the preparation of different stem and leaf extracts and fractions. Ethanol, hydroethanol, and water extracts were prepared by several methods and evaluated for in vitro activity against resistant Plasmodium falciparum (W2 strain), disclosing a low parasite growth inhibition effect (< 50%). Dereplication by UPLC-DAD-ESI−MS of the leaf ethanol extract showed the presence of two known alkaloids, lyalosidic and strictosidinic acids, along with a sinapoyl ester of lyalosidic acid, with m/z 719.33 [M+H]+, which is possibly a new monoterpene indole alkaloid representative. Sequential liquid-liquid acid-base alkaloid separations from the leaf ethanol extract as well as directly from leaf powder afforded fractions of increased parasite growth inhibition, reaching up to 92.5±0.7%. The most bioactive fractions were shown to contain the β-carboline alkaloids harmane and 4-methyl-β-carboline, along with N-methyl-tryptamine and N-acetyl-tryptamine, while monoterpene indole alkaloids were detected in inactive fractions of these processes. The present results demonstrate that these preliminary fractionation methods can lead to significantly active fractions supporting an adequate scale-up to carrying out the isolation of anti-plasmodial compounds.

scholarly journals Moringa oleifera Extract Extenuates Echis ocellatus Venom-Induced Toxicities, Histopathological Impairments and Inflammation via Enhancement of Nrf2 Expression in Rats

2021 ◽  
Vol 28 (1) ◽  
pp. 98-115
Author(s):  
Akindele O. Adeyi ◽  
Sodiq O. Adeyemi ◽  
Enoh-Obong P. Effiong ◽  
Babafemi S. Ajisebiola ◽  
Olubisi E. Adeyi ◽  
...  
Keyword(s):  
Moringa Oleifera ◽  
Ethanol Extract ◽  
Male Rats ◽  
Blood Electrolytes ◽  
Tnf Α ◽  
Group 3 ◽  
Group 2 ◽  
Haematological Indices ◽  
Nrf2 Expression ◽  
Potential Remedy

Echis ocellatus snakebite causes more fatalities than all other African snake species combined. Moringa oleifera reportedly possesses an antivenom property. Therefore, we evaluated the effectiveness of M. oleifera ethanol extract (MOE) against E. ocellatus venom (EOV) toxicities. Thirty male rats were grouped as follows (n = 5): Group 1 (normal control received saline), groups 2 to 6 were administered intraperitoneally, 0.22 mg/kg (LD50) of EOV. Group 2 was left untreated while group 3 to 6 were treated post-envenoming with 0.2 mL of polyvalent antivenom, 200, 400, and 600 mg/kg of MOE respectively. MOE significantly (p<0.05) normalized the altered haematological indices and blood electrolytes profiles. MOE attenuated venom-induced cellular dysfunctions, characterized by a significant increase in NRF2, and concomitant downregulation of increased antioxidant enzymes (SOD and CAT) activities in the serum and heart of the treated rats. MOE normalized the elevated TNF-α and IL-1β in serum and heart tissues. Furthermore, the IgG titre value was significantly (p<0.5) higher in the envenomed untreated group compared to the MOE-treated groups. Hemorrhagic, hemolytic and coagulant activities of the venom were strongly inhibited by the MOE dose, dependently. Lesions noticed on tissues of vital organs of untreated rats were abolished by MOE. Our findings substantiate the effectiveness of MOE as a potential remedy against EOV toxicities.

scholarly journals Characteristics of Graphene Oxide Films Reduced by Using an Atmospheric Plasma System

Nanomaterials ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 802 ◽  
Author(s):  
Chii-Rong Yang ◽  
Shih-Feng Tseng ◽  
Yu-Ting Chen
Keyword(s):  
Graphene Oxide ◽  
Sheet Resistance ◽  
Functional Groups ◽  
Pyrolytic Graphite ◽  
Chemical Oxidation ◽  
Atmospheric Plasma ◽  
Graphene Oxides ◽  
Plasma Irradiation ◽  
Before And After ◽  
Bond Peak

The chemical oxidation method can be used to mass-produce graphene oxides (GOs) from highly oriented pyrolytic graphite. However, numerous oxygen-containing functional groups (hydroxyl, epoxy, carbonyl, etc.) exist in typical GO surfaces, resulting in serious electrical losses. Hence, GO must be processed into reduced graphene oxide (rGO) by the removal of most of the oxygen-containing functional groups. This research concentrates on the reduction efficiency of GO films that are manufactured using atmospheric-pressure and continuous plasma irradiation. Before and after sessions of plasma irradiation with various irradiation times, shelters, and working distances, the surface, physical, and electrical characteristics of homemade GO and rGO films are measured and analyzed. Experimental results showed that the sheet resistance values of rGO films with silicon or quartz shelters were markedly lower than those of GO films because the rGO films were mostly deprived of oxygen-containing functional groups. The lowest sheet resistance value and the largest carbon-to-oxygen ratio of typical rGO films were approximately 90 Ω/sq and 1.522, respectively. The intensity of the C–O bond peak in typical rGO films was significantly lower than that in GO films. Moreover, the intensity of the C–C bond peak in typical rGO films was considerably higher than that in GO films.

scholarly journals Antibacterial Activity of Leaf Extracts ofBaeckea frutescensagainst Methicillin-ResistantStaphylococcus aureus

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Somayeh Razmavar ◽  
Mahmood Ameen Abdulla ◽  
Salmah Binti Ismail ◽  
Pouya Hassandarvish
Keyword(s):  
Antibacterial Activity ◽  
Ethanol Extract ◽  
Diffusion Method ◽  
Disc Diffusion ◽  
Phytochemical Screening ◽  
Bioactive Constituents ◽  
Disc Diffusion Method ◽  
Leaf Extracts ◽  
Baeckea Frutescens ◽  
High Degree

This study was based on screening antibacterial activity of the ethanol extract ofBaeckea frutescensL. against MRSA clinical isolates, analyzes the potential antibacterial compound, and assesses the cytotoxicity effect of the extract in tissue culture. Leaves ofBaeckea frutescensL. were shade dried, powdered, and extracted using solvent ethanol. Preliminary phytochemical screening of the crude extracts revealed the presence of alkaloids, flavonoids, steroids, terpenoids, phenols, and carbohydrates. The presence of these bioactive constituents is related to the antibacterial activity of the plant. Disc diffusion method revealed a high degree of activity against microorganisms. The results confirm thatBaeckea frutescensL. can be used as a source of drugs to fight infections caused by susceptible bacteria.

scholarly journals Anti-Lipidemic Effect of Combined Leaf Extracts of <i>Moringa oleifera</i> and <i>Peristrophe bicalyculata</i> in Alloxan-Induced Diabetic Rats

2014 ◽  
Vol 05 (04) ◽  
pp. 340-348 ◽  
Author(s):  
I. A. Iwara ◽  
G. O. Igile ◽  
I. P. Ogar ◽  
O. E. Mboso ◽  
U. P. Ujong ◽  
...  
Keyword(s):  
Moringa Oleifera ◽  
Diabetic Rats ◽  
Leaf Extracts ◽  
Peristrophe Bicalyculata

scholarly journals Uji Aktivitas Antioksidan Ekstrak Air dan Ekstrak Etanol Daun Kelor (Moringa Oleifera LAM)

2017 ◽  
Vol 6 (2) ◽  
pp. 125
Author(s):  
Rizkayanti Rizkayanti ◽  
Anang Wahid M. Diah ◽  
Minarni Rama Jura
Keyword(s):  
Vitamin C ◽  
Moringa Oleifera ◽  
Water Extract ◽  
Ethanol Extract ◽  
Positive Control ◽  
Negative Control ◽  
Ic50 Value ◽  
Antioxidant Potency ◽  
Ethanol Extracts ◽  
Moringa Oleifera Lam

Moringa (moringa oleifera Lam) leaves contains many molecules as inhibitors for free radicals such as phenolic compounds (phenolic acids, flavonoids, quinones, coumarins, lignans, stilbenes, tannins), nitrogen compounds (alkaloids, amines, betalain), vitamins, terpenoids (including carotenoids), and several other endogenous metabolites as antioxidants. This study aimed to determine the antioxidant potency of water and ethanol extracts of moringa (moringa oleifera Lam) leave obtained by maceration and dekok. The concentration of free radical 1,1-diphenyl-2-picrylhydrazyl (DPPH) was analyzed using UV-Vis spectrophotometer after addition of various concentrations of Moringa leaves extracts. Various concentrations of moringa leave extracts used were 20 ppm, 40 ppm, 60 ppm and 80 ppm. Vitamin C solutions as the positive control were prepared on similar various concentrations. The negative control was prepared using DPPH solutions dissolved in absolute ethanol. The results indicated that the ethanol extract of moringa leaves prepared by maceration method showed the antioxidant potency with an IC50 value of 22.1818 ppm, but the IC50 value of water extract of moringa leaves prepared by dekok was 57.5439 ppm. While, the IC50 value of Vitamin C was 8.8084 ppm. Based on the IC50 data it can be concluded that Vitamin C is a stronger antioxidant than moringa leaves extracts.

scholarly journals IMMOBILIZATION OF Saccharomycess cereviceae BIOMASS ON CHITOSAN AND ITS APPLICATION AS AN ADSORBENT FOR Pb(II) ION

2011 ◽  
Vol 11 (2) ◽  
pp. 174-179 ◽  
Author(s):  
Hasri Hasri ◽  
Mudasir Mudasir ◽  
Nurul Hidayat Aprilita ◽  
Roto Roto
Keyword(s):  
Optimum Condition ◽  
Functional Groups ◽  
Contact Time ◽  
Metal Ion ◽  
Mass Ratio ◽  
Adsorption Experiment ◽  
Ion Removal ◽  
Before And After ◽  
The Difference

An application of Saccharomycess cereviceae biomass immobilized on chitosan (SC-Chi adsorbent) for Pb(II) ion removal was demonstrated. Adsorption experiment was conducted at various mass ratio of Saccharomycess cereviceae biomass to chitosan, contact time, pH of solution and concentration of cation. Total Pb(II) metal ion adsorbed was calculated from the difference of the amount of metal ion before and after adsorption which was measured by AAS. The results showed that optimum condition for adsorption of Pb(II) ion by the SC-Chi was achieved using mass ratio of Saccharomycess cereviceae to chitosan of 50% (w/w), pH solution of 7, contact time of 60 min and concentration of 25 mgL-1. The hydroxyl (-OH) and amino (-NH2) functional groups are believed to be responsible for the adsorption of Pb(II) ion by the adsorbent.

scholarly journals The Effect of Extract Supplements of Moringa Oleifera Leaves Plus Royal Jelly on Hemoglobin (Hb) Levels of Anemia Pregnant Mother in Takalar Regency

2020 ◽  
Vol 1 (2) ◽  
pp. 22-29
Author(s):  
Yulni Yulni ◽  
Veni Hadju ◽  
Burhanuddin Bahar ◽  
Citrakesumasari Citrakesumasari ◽  
Rahayu Indriasari ◽  
...  
Keyword(s):  
Pregnant Women ◽  
Leaf Extract ◽  
Moringa Oleifera ◽  
Royal Jelly ◽  
P Value ◽  
Double Blind ◽  
Significant Difference ◽  
Before And After ◽  
The Difference ◽  
Double Blind Design

The aim of this study was to determine the effect of Moringa oleifera leaf extract supplements, Moringa oleifera leaf extract plus royal jelly and placebo on hemoglobin levels in anemic pregnant women. This research is a randomized controlled double blind design study which was conducted in Polombangkeng Utara District, Takalar Regency for 2 months. The subjects of this study were pregnant women with anemia, the majority of which were 20-35 years old, primigravida parity, income less than UMR, unemployment, higher education, pregnancy distance of more than 2 years with p value> 0.05. Then divided into three groups, namely Moringa capsules plus royal jelly (KRJ) (n = 24), Moringa capsules (KTR) (n = 24) and placeco (PLC) (n = 21). Before and after the intervention, measurements of hemoglobin levels were carried out using the Hemocue tool and interviewing the characteristics of the respondents. The results showed that the average Hb level increased from each group (mean SD): KRJ 10.06 ± 0.75 to 11.42 ± 1.23, P = 0.001, KTR 10.40 ± 0.46 to 11.15 ± 0 , 90 P = 0.001 and PLC 10.43 ± 0.42 becomes 11.14 ± 0.88 P = 0.002. but there was no significant difference from the difference in the average increase in Hb levels in the three groups, but there was a tendency that KRJ was superior to the KTR and PLC groups with an increase of 1.36 gr / dl, KTR 0.75 gr / dl and PLC 0.71 gr / dl. So it can be concluded that KRJ is better than KTR and PLC in increasing Hb levels in anemic pregnant women in Takalar Regency.

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