Article Per Year (5 Year)
p-Index From 2020 - 2025
1.318
P-Index
This Author published in this journals
All Journal JOURNAL OF CHEMICAL NATURAL RESOURCES (JCNaR) Unesa Journal of Chemistry Asian Journal of Environmental Research Journal of Scientific Insights Indonesian Journal of Green Chemistry
Yakubu, Shedrach
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Education Energy Engineering Materials Science & Nanotechnology Medicine & Pharmacology Public Health Social Sciences Other

Published : 8 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 8 Documents
Search

 1 
Investigatory Study of the Growing Effect of African Teak (Pterocarpus erinaceus) Bark in Modified Feed Using Rabbit Onyema, Agu Matthew; Garba, Suleiman Ismail; Yakubu, Shedrach; Inya, Agha Inya; Sylvester, Onyima Chibuike
Asian Journal of Environmental Research Vol. 1 No. 2 (2024): May-August
Publisher : CV. Science Tech Group

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69930/ajer.v1i2.23

Abstract

A total number of 3 growing rabbits about two weeks old were used in an experiment that lasted for 2 weeks. To investigate the growing effect of Pterocarpus erinaceus on growing rabbits. Three experimental diets, T1, T2, and T3 containing 0 %, 2.5 and 5 % of Pterocarpus erinaceus meal respectively were formulated, and three rabbits were randomly assigned to each diet. Daily feed intake was significantly higher in animals receiving Pterocarpus erinaceus bark meal than in animals on the control diet. Body weight changes of the animals on T1 were significantly higher than those on T2 and T3. The feed conversion ratio was the same in both T1, T2 and T3. The result of this experiment reveals that Pterocarpus erinaceus bark meal can be used in the diet for growing rabbits at a 5 % dietary level to enhance feed intake and weight gain thereby growing rabbits without compromising feed efficiency. The insight from the medicinal point of view makes the feed potent for ailment treatment and enhances both PCV and Hb. The initial PCV before the administration of the feed was for T1; 20.30 %, T2; 20.70 %, and T3; 21.68 %. After the administration of the feed, the final PCV was for T1; 24.60 % T2; 27.20 %, and T3; 28.20%. In the case of Hb, the initial Hb for T1 was 6.8, T2 was 6.9 and T3 was 7.2 whereas, after the administration of the feed, the final Hb for T1 was 8.2 g/dL, T2 was 9.2 g/dL and T3 was 9.4 g/dL. The use of Pterocarpus erinaceus as a natural source in meal preparation may help to reduce cost of feed preparation, improve, maintain and supplement to meet daily requirements of essential nutrients by reducing the use of synthetic food supplements.
A Review on Tea Leaves and Tea Fibre as Adsorbents for Heavy Metals Removal A, Undie David; E, Etim Emmanuel; S, Samuel Humphrey; Yakubu, Shedrach
Journal of Scientific Insights Vol. 1 No. 2 (2024): August
Publisher : Science Tech Group

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Heavy metal pollution is a significant environmental concern due to its detrimental effects on ecosystems and human health. The conventional techniques for the eliminating heavy metals from water-based solutions, like chemical precipitation and ion exchange, have certain drawbacks in terms of effectiveness, expenses, and ecological impact. In recent years, researchers have explored the use of natural materials, including tea leaves and tea fibre, as alternative adsorbents for heavy metal removal. From research, tea leaves and tea fibre, derived from the camellia sinensis plant, have emerged as promising adsorbent due to their abundance, low cost, and potential for heavy metal adsorption from aqueous phase. This comprehensive review aims to summarize and evaluate the current state of knowledge regarding the use of tea leaves and tea fibre in the removal of heavy metals from aqueous solutions. It will discuss the adsorption mechanisms, influencing factors, and potential applications of these natural materials. The research will also covers a comparative analysis of this adsorbent with other adsorbents, isotherms, kinetics and equilibrium studies, as well as regeneration and reusability of tea-based adsorbents.
Eco-Friendly Remediation: Tea Leaves and Fibres as Adsorbents for High Cobalt Concentrations; Thermodynamics, Isotherms and Kinetic Studies E. Etim, Emmanuel; Yakubu, Shedrach; C. Onaji, Emmanuel
Asian Journal of Environmental Research Vol. 1 No. 1 (2024): January-April
Publisher : CV. Science Tech Group

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69930/ajer.v1i1.9

Abstract

Increasing industrialization has produced huge amounts of liquid effluents, which are a key source of ecological unrest in diverse ecosystems. The high toxicity level of cobalt in surface water has drawn a lot ofattention; hence,a low-cost adsorbent made from leaves and fibres of Camellia sinensis has been developed to remove cobalt from wastewater. The kinetics of the pseudo-first and second-order sorption interaction, as well as the physicochemical parameters of the precursor adsorbent, was investigated. There was a linear relationship between Cobalt uptake and biosorbent dosage under ideal conditions; the optimum dosage was 4 g. Between 10 to 40 minutes of contact time, clearance of cobalt was greater than 90 per cent. The Gibb’s free energy (∆Go) at various temperatures ranges from -9980 to -1020, indicating a spontaneous system, viable for both parts of the precursor adsorbent. The entropy change (∆So) was found to be +31.05 and +35.12 for tea leaves and fibre respectively, implying a highly disordered biosorption interface. The enthalpy (∆Ho) was found to be-8.58 and -10.03 for tea leaves and fibres hence, an exothermic system was suggested by the enthalpy with a second order kinetics. Therefore, Camellia sinensis is a suitable adsorbent for the effective removal of high cobalt concentrations in wastewater.
INVESTIGATION ON THE BIOSORPTION OF MANGANESE USING TEA LEAVES AND TEA FIBERS (camellia sinensis) AS ADSORBENTS Etim, Emmanuel E.; Yakubu, Shedrach; Undie, David Akpanke; Shinggu, John Paul
Unesa Journal of Chemistry Vol. 13 No. 2 (2024): Vol 13 No 2 (2024)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, Surabaya State University, located at Jl Ketintang, Surabaya, East Java, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Heavy metal-containing liquid effluents pose a health and environmental risk due to the rapid industrialization of businesses like mining, petrochemicals, fertilizers, and pesticides. The adsorption of manganese from an aqueous solution utilizing biosorbents such as tea leaves and tea fibers is the subject of this study. The adsorption process was studied by varying the initial concentration, adsorption dosage, time, temperature, and pH of the adsorbents. The FTIR results confirmed the presence of -OH, -NH2, C=O providing binding sites in both tea leaves and fibers. The research uses Langmuir and Freundlich adsorption isotherms, with Freundlich the best fitting for tea fiber and Langmuir for tea leaves. Kinetic studies show second-order kinetics is better for both, confirming an endothermic biosorption process.
Physicochemical, Proximate, Heavy Metals and Antimicrobial Assessment of Few Selected Herbal Medicinal Products Consumed in Awka, Anambra State, Southeastern, Nigeria Onyema Agu, Matthew; Dennis Onyema, Anayochukwu; Yakubu, Shedrach; Chibuike Sylvester, Onyima
Indonesian Journal of Green Chemistry Vol. 2 No. 1 (2025): April
Publisher : Science Tech Group

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69930/ijgc.v2i1.320

Abstract

Traditional medicine remains the principal approach to healthcare in the third world, but knowledge about preparation methods, toxicological effects, and side effects is lacking. This study evaluates the quality of local herbal medicines in Awka, Anambra State, Southeastern, Nigeria by assessing the proximate composition, physicochemical, heavy metals, and antimicrobial efficacy of a few selected herbal medicines. The physiochemical analysis of herbal drugs revealed high acidity, except for the herbal medicine called ‘Evacuation’. The evaluated Herbal medicines are rich in alkaloids, flavonoids, tannins, phenol, and saponins but poor in protein, resin, steroid, and terpenoid. The concentrations of iron, chromium, and lead exceeded WHO/FAO limits. The Herbal medicines have lower zones of inhibition as compared to the 99 % efficacy inscription on the label. In the case of proximate composition, the herbal medicine ‘Super 7’ contains higher protein, fat, and ash content, while ‘Deep root’ has the highest fiber, ADC has the highest moisture, and Evacuation has the highest carbohydrate. Therefore, from a toxicological point of view, some of these herbal medicines may not be safe for consumption and they may pose health risks ranging from kidney failure, gastrointestinal disorder, dysentery, and cancer of the vital organs of the consumers due to the presence of toxic metals, high acidity, and imbalance in concentrations of the bioactive constituents.
Morphological and Spectroscopic Characterization of Costus afer Ker Gawl. Leaf on Surface Modification with Archachatina marginata Mucus as a Potential Carrier for Anti-diabetic Therapy Matthew Onyema, Agu; Yakubu, Shedrach; Cletus, Ukwubile; Chibuike Sylvester, Onyima; Chibuzor Odidika, Collins; Chinedu Jude, Onwuka
Indonesian Journal of Green Chemistry Vol. 2 No. 1 (2025): April
Publisher : Science Tech Group

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69930/ijgc.v2i1.321

Abstract

FTIR and SEM analyses were conducted on Costus afer Methanol leaf extract (CAPExt), Snail mucus (GALSM), and a mixture of extracts to study surface modification of snail mucus. The FTIR of the plant extract and mixed extracts [CAPExt/GALSM] showed strong absorption bands. The absorption bands at 3363.97 – 3363.25, 2854.74 – 2962.74, 1381.08 – 1450.52, 1519.96 – 1558.54, 1651.12 – 1712.85, 1242.20 – 1265.35, and 1033.88 – 1165.04 cm-1 were characteristic absorption peaks of O – H stretching vibrations, C – H deformation, aromatic rings, esters, acetyl groups, and carboxylate groups. SEM images reveal a smooth plant extract surface with a rough area containing bioactive molecules, while snail mucus morphology reveals crystalline cube-shaped molecules. SEM images reveal rocky, swollen, roughened, and bulging CAPExt/GALSM molecules, suggesting a new method for structural development of anti-diabetic drug carriers, potentially releasing plant material intermittently upon absorption.
Antioxidant Activity of Bioactive and Mineral Constituents of Jatropha curcas Linn. (Euphorbiaceae) Leaf and Seed Extract Yakubu, Shedrach; Yebpella, Garbunga
Journal of Chemical Natural Resources Vol. 6 No. 1 (2024): Journal of Chemical Natural Resources
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jcnar.v6i1.15658

Abstract

In recent years, there has been a surge in research on natural products, particularly plant-based ones, for pharmaceutical formulations and food supplements. Natural products rich in bioactive components like phenols, flavonoids, alkaloids, and saponins, and elemental minerals like Fe, Mg, Mn, and Cu, serve as antioxidants, anti-inflammatory, and antimicrobial agents. This study investigates the antioxidant capacity of Jatropha curcas leaves and seeds and the qualitative and quantitative phytochemical analysis and mineral compositions of the plant’s leaves and seeds. The samples were collected and treated before being extracted through cool maceration in methanol. The antioxidant activities of the methanol extracts were evaluated using the DPPH Assay after their concentration was achieved using a rotary evaporator. Both quantitative and qualitative analysis was conducted to investigate the presence of phytochemicals in both the seed and leaves of J. curcas. The presence of elemental minerals such as Fe, Mn, Cu, Zn, and Mg was investigated using AAS. The phytochemical analysis of J. curcas revealed the presence of phenols, flavonoids, tannins, saponins, and steroids in both leaves and seeds, while alkaloids and terpenoids were found in the leaves. The mineral composition indicates Mg levels of 1161.65 mg/Kg in leaves and 590.66 mg/kg in seeds, with Cu absent in leaves while Mn highest in leaves. The study found that Jatropha curcas leaves have the highest antioxidant activities (82.6%), competing with the ascorbic acid standard (86.2%), with less activity in seeds (52.7 %), suggesting the high potential of the leaves for pharmaceutical formulations and food supplements.
Radon-222 in Drinking Water: Concentration and Radiological Risk in Nigerian Boreholes Akeem, Adeyoju Adewale; Nnamdi, Agu Mathew; Israel Ndamawo, Gana; Yakubu, Shedrach
Indonesian Journal of Green Chemistry Vol. 2 No. 2 (2025): October
Publisher : Science Tech Group

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69930/ijgc.v2i2.573

Abstract

The consumption of contaminated water, especially those polluted by heavy metals, effluents, radioactive waste, etc., has posed a significant health risk in most developing economies. Therefore, researchers nowadays strive to ameliorate this menace. Hence, this study analyzed the concentration of Radon-222 in twenty drinking water samples collected from boreholes in Nigeria to provide insight into the concentration distribution of Radon-222 in the northwestern part of Nigeria. The Radon-222 concentrations in borehole water samples collected from Lagos and Ogun states were measured using a liquid scintillation counter at the Center for Energy Research and Training (CERT) in Ahmadu Bello University, Zaria. Radon concentrations for borehole water collected from 10 locations in Lagos State range between 51.78 Bq/L and 118.88 Bq/L, while those obtained from 10 selected locations in Ogun State range between 12.92 Bq/L and 110.26 Bq/L. The recorded mean values of radon concentrations obtained in this study for the borehole water in the two States were found to be above the world average Maximum Contamination Level (MCL) of 10 Bq/L set by the World Health Organization and the MCL of 11.1 Bq/L set by the United States Environmental Protection Agency (USEPA).
Co-Authors A, Undie David Akeem, Adeyoju Adewale C. Onaji, Emmanuel Chibuike Sylvester, Onyima Chibuzor Odidika, Collins Chinedu Jude, Onwuka Cletus, Ukwubile Dennis Onyema, Anayochukwu E, Etim Emmanuel E. Etim, Emmanuel Etim, Emmanuel E. Garba, Suleiman Ismail Inya, Agha Inya Israel Ndamawo, Gana Matthew Onyema, Agu Nnamdi, Agu Mathew Onyema Agu, Matthew Onyema, Agu Matthew S, Samuel Humphrey Shinggu, John Paul Sylvester, Onyima Chibuike Undie, David Akpanke Yebpella, Garbunga