Raphael Johnson

Pharmaceutics

About

Raphael Johnson (PhD) is a Senior Lecturer at the Department of Pharmaceutics, Faculty of Pharmacy and Pharmaceutical Sciences. He obtained his Bachelor of Pharmacy degree in 2002 and Master of Pharmacy in Pharmaceutics in 2006 from the Kwame Nkrumah University of Science and Technology. He obtained his doctorate in Biopharmaceutics and Pharmaceutical Technology from Johannes Gutenberg Universität, Mainz, Germany under Government of Ghana/DAAD scholarship. He is a member of the Pharmaceutical Society of Ghana. He has several publications in peer-reviewed journals and conference proceedings.

Research Summary

(inferred from publications by AI)

The researcher's work is centered on a diverse range of topics at the intersection of pharmaceutical chemistry, biopharmaceutical sciences, and food science. Their research spans key areas such as the application of polysaccharides like polycarboxylates in drug delivery systems, the role of plant cell walls in scaffolding materials, essential oils' properties in antimicrobial applications, and advancements in understanding cucurbitaceae bioactive compounds. These themes are interconnected, with each contributing to broader investigations into natural compounds, analytical techniques, policy impacts, and food composition. The researcher's work highlights a commitment to understanding both traditional and emerging strategies in drug delivery, plant-based ingredients, and the properties of essential natural components, reflecting a holistic approach to advancing pharmaceutical science.

Research Themes

All Papers

Pharmaceutical Assessment of Watermelon Rind Pectin as a Suspending Agent in Oral Liquid Dosage Forms(2022)

Pharmaceutical Assessment of the Impact of the Method of Extraction on the Suitability of Pectin from Plantain (Musa paradisiaca) Peels as a Suspending Agent in Oral Liquid Formulations(2023)

Sweet Potato Peel Pectin's Potential as a Suspending Agent in Pharmaceutical Formulations: The Effect of Extraction Technique(2025)

Formulation and Evaluation of Herbal‐Based Antiacne Gel Preparations(2023)

Fasted-State Simulated Intestinal Fluid "FaSSIF-C", a Cholesterol Containing Intestinal Model Medium for In Vitro Drug Delivery Development(2015)

Nanoparticle structure development in the gastro‐intestinal model fluid FaSSIF<sub>mod6.5</sub> from several phospholipids at various water content relevant for oral drug administration(2014)

Effect of Ripening and Extraction Method on the Physicochemical Properties of Pectin Extracted from Peels of Apem and Apantu Plantain Cultivars in Ghana(2024)

Physicochemical and Microbiological Characteristics of Stem Bark Exudate Gum of Cordia millenii Tree in Conventional Release Tablets(2023)

Evaluation of the Physicochemical and Micromeritic Properties of Exudate Gum of Cussonia arborea Stem Bark in Conventional Tablet Formulation(2024)

Investigation of the binding properties of purified Pentadesma butyracea gum: Anatural alternative to a synthetic polymer(2023)

Investigation of the physicochemical properties of freeze-dried fruit pulp of Telfairia occidentalis and its potential use as suspending agent(2022)

Formulation of Suppositories of Alum Produced from Bauxite Waste in Ghana for the Treatment of Hemorrhoid(2021)

Pharmaceutical Assessment of Melia azedarach Gum as a Binder and Disintegrant in Immediate-Release Tablets(2022)

Development of the RP-HPLC Method for Simultaneous Determination and Quantification of Artemether and Lumefantrine in Fixed-Dose Combination Pharmaceutical Dosage Forms(2024)

Amphotericin B microparticles ‘AmbiShell’ from phospholipid and gelatin: Development and investigation by combined DLS and SANS resolves the core‐shell structure(2014)

Biogenic Waste from Two Varieties of Plantain in Ghana Contain Pectin with Potential Binding Properties in Conventional Tablets(2024)

Comparison of the physicochemical properties and in vivo bioavailability of generic and innovator artemether-lumefantrin tablets in Kumasi, Ghana(2018)

Target Nanoparticles for Therapy - SANS and DLS of Drug Carrier Liposomes and Polymer Nanoparticles(2016)

Quality and Safety Assessment of Omega-3 Fatty Acids Supplements on the Ghanaian Market(2022)

Bioequivalence studies of cetirizine tablets using the urine excretion data of healthy Ghanaian male volunteers(2023)

Rule of Engagement: How to Impact Culture & Climate in 30 Days(2016)

Amphotericin B nano-formulations : development, characterisation and suitability for oral administration(2015)

(2011)

The Effect of the Method of Extraction on the Physicochemical Properties of Allanblackia Floribunda Butter as a Potential Pharmaceutical Excipient(2022)

The Impact of the Extraction Method on Allanblackia floribunda Butter’s Physicochemical Properties as a Possible Pharmaceutical Excipient(2023)

The Consumption of Energy Drink and Its Potential Effect on Sleep Patterns: A Case Study in the Kumasi Metropolis(2023)

Investigating the Presence of Falsified and Poor-Quality Fixed-Dose Combination Artemether-Lumefantrine Pharmaceutical Dosage Forms in Kumasi, Ghana(2024)

Pharmaceutical evaluation of plantain peel pectin as a disintegrant in conventional tablets(2025)

Pain Management and the Opioid Policy Landscape in Sub-Saharan Africa: A Systematic Review of Access, Regulation, and Health Governance from 1990 to 2024(2025)

Formulation and evaluation of topical gels containing Phyllanthus muellerianus leaf extract using various gelling agents(2025)

Collaboration Network

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Research Collaboration Map

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About This Profile

This profile is generated from publicly available publication metadata and is intended for research discovery purposes. Themes, summaries, and trajectories are inferred computationally and may not capture the full scope of the lecturer's work. For authoritative information, please refer to the official KNUST profile.