Skip to content

Home Search Authors Pakistan News Saved

SciRah

SciRah does not host or store research papers. Results come live from free, official scholarly APIs, and every paper links back to its original source.

Data sources

OpenAlex
Semantic Scholar
Crossref
CORE
arXiv
PubMed

Privacy policy Terms of service

E. Okello · SciRah

Researcher profile · Semantic Scholar

E. Okello

Share profile

E. Okello — researcher profile on SciRah

h-index: 26
Works: 56
Citations: 2,748

Most-cited papers

Effects of resveratrol on cerebral blood flow variables and cognitive performance in humans: a double-blind, placebo-controlled, crossover investigation.
D. Kennedy, E. Wightman, J. Reay, G. Lietz +3 more
2010American Journal of Clinical Nutrition422 citations Open access
Semantic Scholar
Synergistic and antagonistic interactions of anticholinesterase terpenoids in Salvia lavandulaefolia essential oil.
Sergey U. Savelev, E. Okello, N. Perry, R. Wilkins +1 more
2003Pharmacology, Biochemistry and Behavior363 citations Open access
Semantic Scholar
Butyryl‐ and acetyl‐cholinesterase inhibitory activities in essential oils of Salvia species and their constituents
Sergey U. Savelev, E. Okello, E. Perry
2004Phytotherapy Research201 citations Open access
Semantic Scholar
Effects of Cholinesterase Inhibiting Sage (Salvia officinalis) on Mood, Anxiety and Performance on a Psychological Stressor Battery
D. Kennedy, S. Pace, C. Haskell, E. Okello +2 more
2006Neuropsychopharmacology153 citations Open access
Semantic Scholar
Bioindicators of enhanced nitrogen deposition.
C. Pitcairn, David Fowler, I. Leith, L. Sheppard +3 more
2003Environmental Pollution123 citations Open access
Semantic Scholar
In vitro anti‐β‐secretase and dual anti‐cholinesterase activities of Camellia sinensis L. (tea) relevant to treatment of dementia
E. Okello, Sergey U. Savelev, E. Perry
2004Phytotherapy Research119 citations
Semantic Scholar
Monoterpenoid extract of sage (Salvia lavandulaefolia) with cholinesterase inhibiting properties improves cognitive performance and mood in healthy adults
D. Kennedy, Fiona Dodd, Bernadette C. Robertson, E. Okello +3 more
2011Journal of Psychopharmacology117 citations
Semantic Scholar
Volatile Terpenes and Brain Function: Investigation of the Cognitive and Mood Effects of Mentha × Piperita L. Essential Oil with In Vitro Properties Relevant to Central Nervous System Function
D. Kennedy, E. Okello, P. Chazot, M. Howes +6 more
2018Nutrients99 citations Open access
Semantic Scholar
Cognitive and mood improvements following acute supplementation with purple grape juice in healthy young adults
C. Haskell-Ramsay, R. Stuart, E. Okello, A. W. Watson
2017European Journal of Nutrition93 citations Open access
Semantic Scholar
In vitro protective effects of Withania somnifera (L.) dunal root extract against hydrogen peroxide and β‐amyloid(1–42)‐induced cytotoxicity in differentiated PC12 cells
Suresh Kumar, C. Seal, M. Howes, G. Kite +1 more
2010Phytotherapy Research84 citations
Semantic Scholar
Inhibition of acetylcholinesterase by green and white tea and their simulated intestinal metabolites.
E. Okello, Ramin Leylabi, G. McDougall
2012Food & Function75 citations Open access
Semantic Scholar
Environmental interactions with the toxicity of plant essential oils to the poultry red mite Dermanyssus gallinae
D. George, O. Sparagano, G. Port, E. Okello +2 more
2010Medical and Veterinary Entomology71 citations
Semantic Scholar
Repellence of plant essential oils to Dermanyssus gallinae and toxicity to the non-target invertebrate Tenebrio molitor.
David George, O. Sparagano, G. Port, E. Okello +2 more
2009Veterinary parasitology71 citations Open access
Semantic Scholar
In vitro protective effects of an aqueous extract of Clitoria ternatea L. flower against hydrogen peroxide‐induced cytotoxicity and UV‐induced mtDNA damage in human keratinocytes
N. N. A. Zakaria, E. Okello, M. Howes, M. Birch-Machin +1 more
2018Phytotherapy Research63 citations
Semantic Scholar
Comparative Kinetics of Acetyl- and Butyryl-Cholinesterase Inhibition by Green Tea Catechins|Relevance to the Symptomatic Treatment of Alzheimer’s Disease
E. Okello, Joshua Mather
2020Nutrients60 citations Open access
Semantic Scholar
An Aqueous Extract of Withania somnifera Root Inhibits Amyloid β Fibril Formation In Vitro
Suresh Kumar, R. Harris, C. Seal, E. Okello
2012Phytotherapy Research56 citations
Semantic Scholar
Effects of Five Ayurvedic Herbs on Locomotor Behaviour in a Drosophila melanogaster Parkinson’s Disease Model
R. Jansen, B. Brogan, Alexander J. Whitworth, E. Okello
2014Phytotherapy Research51 citations Open access
Semantic Scholar
Use of Plant‐derived Products to Control Arthropods of Veterinary Importance: A Review
D. George, J. Guy, S. Arkle, D. Harrington +5 more
2008Annals of the New York Academy of Sciences50 citations Open access
Semantic Scholar
Effects of the Red Bull energy drink on cognitive function and mood in healthy young volunteers
K. Wesnes, H. Brooker, A. Watson, W. Bal +1 more
2017Journal of Psychopharmacology49 citations Open access
Semantic Scholar
Toxicity of plant essential oils to different life stages of the poultry red mite, Dermanyssus gallinae, and non‐target invertebrates
D. George, O. Sparagano, G. Port, E. Okello +2 more
2010Medical and Veterinary Entomology48 citations Open access
Semantic Scholar
Kinetics of acetylcholinesterase inhibitory activities by aqueous extracts of Acacia nilotica (L.) and Rhamnus prinoides (L'Hér.)
Catherine Megan Crowch, E. Okello
200942 citations
Semantic Scholar
The impact of blackcurrant juice on attention, mood and brain wave spectral activity in young healthy volunteers
A. Watson, E. Okello, Helen Brooker, S. Lester +2 more
2019Nutritional neuroscience41 citations Open access
Semantic Scholar
Anti-collagenase, anti-elastase and antioxidant activities of Pueraria candollei var. mirifica root extract and Coccinia grandis fruit juice extract: An In vitro study
Thatchanan Chattuwatthana, E. Okello
201535 citations Open access
Semantic Scholar
Kinetics of acetylcholinesterase inhibition by an aqueous extract of Withania somnifera roots
Suresh Kumar, C. Seal, E. Okello
201133 citations
Semantic Scholar
Effects of green and black tea consumption on brain wave activities in healthy volunteers as measured by a simplified Electroencephalogram (EEG): A feasibility study
E. Okello, A. M. Abadi, Saad A. Abadi
2016Nutritional neuroscience29 citations Open access
Semantic Scholar
Determination of Lovastatin, β-glucan, Total Polyphenols, and Antioxidant Activity in Raw and Processed Oyster Culinary-Medicinal Mushroom, Pleurotus ostreatus (Higher Basidiomycetes).
Yu-Shan Lam, E. Okello
2015International Journal of Medicinal Mushrooms28 citations
Semantic Scholar
The Pathopharmacological Interplay between Vanadium and Iron in Parkinson’s Disease Models
Samuel Ohiomokhare, F. Olaolorun, A. Ladagu, F. Olopade +4 more
2020International Journal of Molecular Sciences22 citations Open access
Semantic Scholar
Experimental inhibition of fibrillogenesis and neurotoxicity by amyloid-beta (Aβ) and other disease-related peptides/proteins by plant extracts and herbal compounds.
Suresh Kumar, E. Okello, J. Harris
2012Sub-cellular biochemistry19 citations Open access
Semantic Scholar
Incremental Doses of Nitrate-Rich Beetroot Juice Do Not Modify Cognitive Function and Cerebral Blood Flow in Overweight and Obese Older Adults: A 13-Week Pilot Randomised Clinical Trial
Abrar M Babateen, O. Shannon, G. O'Brien, E. Okello +8 more
2022Nutrients16 citations Open access
Semantic Scholar
Acceptability and Feasibility of a 13-Week Pilot Randomised Controlled Trial Testing the Effects of Incremental Doses of Beetroot Juice in Overweight and Obese Older Adults
Abrar M Babateen, O. Shannon, G. O'Brien, E. Okello +12 more
2021Nutrients15 citations Open access
Semantic Scholar
The effect of seaweed enriched bread on carbohydrate digestion and the release of glucose from food
M. Wilcox, P. Cherry, P. Chater, Xing Yang +4 more
2021Journal of Functional Foods14 citations Open access
Semantic Scholar
Antioxidant, Anti-Collagenase, Anti-Elastase and Anti-Tyrosinase Activities of an Aqueous Cosmos caudatus Kunth (Asteraceae) Leaf Extract
N. Zakaria, E. Okello, M. Howes
2021Tropical Journal of Natural Product Research12 citations Open access
Semantic Scholar
Butyrylcholinesterase K variant associated with higher enzyme activity in the temporal cortex of elderly patients.
A. Tasker, C. Ballard, C. Joachim, D. Warden +6 more
2008Neuroscience Letters12 citations Open access
Semantic Scholar
Phytochemical Analysis and in vitro Antioxidant Potential of Aqueous and Ethanol Extracts of Irvingia gabonensis Stem Bark
C. Otitolaiye, A. Omonkhua, K. Oriakhi, E. Okello +2 more
2023Pharmacognosy Research11 citations Open access
Semantic Scholar
Tea consumption and measures of attention and psychomotor speed in the very old: the Newcastle 85+ longitudinal study
E. Okello, N. Mendonça, Blossom C. M. Stephan, G. Muniz-Terrera +2 more
2020BMC Nutrition9 citations Open access
Semantic Scholar
Protocol and recruitment results from a 13-week randomized controlled trial comparing the effects of different doses of nitrate-rich beetroot juice on cognition, cerebral blood flow and peripheral vascular function in overweight and obese older people
Abrar M Babateen, S. Rubele, O. Shannon, E. Okello +7 more
2020Contemporary Clinical Trials Communications7 citations Open access
Semantic Scholar
In vitro inhibition of human acetyl- and butyryl-cholinesterase by Narcissus poeticus L. (Amaryllidaceae) flower absolute
E. Okello, C. Dimaki, M. Howes, P. Houghton +1 more
20087 citations
Semantic Scholar
Nitrogen Application Can Be Reduced without Affecting Carotenoid Content, Maturation, Shelf Life and Yield of Greenhouse Tomatoes
D. Chormova, V. Kavvadias, E. Okello, R. Shiel +1 more
2023Plants5 citations Open access
Semantic Scholar
Essential oils and aromas that affect mood and cognition
E. Okello, M. Howes
2018The Routledge International Handbook of Psychobiology5 citations Open access
Semantic Scholar
The effect of essential oils showing acaricidal activity against the poultry red mite (Dermanyssus gallinae) on aspects of welfare and production of laying hens
George, O. Sparagano, G. Port, E. Okello +2 more
2010Animal Welfare4 citations
Semantic Scholar
Anti-diabetic, anti-pancreatic lipase, and anti-protein glycation potential of Irvingia gabonensis stem bark extracts: in vitro and in silico studies
A. Omonkhua, Catherine Otitolaiye, Bobby Aguebor-Ogie, O. Elekofehinti +3 more
2024In Silico Pharmacology3 citations Open access
Semantic Scholar
Evaluation of the antioxidant efficacy of extracts/ ingredients used in skin care products
N. N. A. Zakaria, E. Okello, O. Idowu
2018International Journal of Phytocosmetics and Natural Ingredients3 citations Open access
Semantic Scholar
Erratum to: Cognitive and mood improvements following acute supplementation with purple grape juice in healthy young adults
C. Haskell-Ramsay, R. Stuart, E. Okello, A. W. Watson
2017European Journal of Nutrition3 citations Open access
Semantic Scholar
High Concentrations of Non-Esterified Fatty Acids During Bovine In Vitro Fertilisation Are Detrimental for Spermatozoa Quality and Pre-Implantation Embryo Development
Abdullahi Idriss, E. Okello, Roger G. Sturmey, Miguel A. Velazquez
2025Journal of Developmental Biology2 citations Open access
Semantic Scholar
Tea consumption and measures of attention and psychomotor speed in the very old: the Newcastle 85+ longitudinal study.
E. Okello, N. Mendonça, Blossom C. M. Stephan, G. Muniz-Terrera +2 more
2020BMC Nutrition2 citations Open access
Semantic Scholar
In vitro Fermentation Method as a Tool to Assess the Effects of Secondary Metabolites on Rumen Fermentation—A Brief Review
H. Lima, E. Okello
20182 citations Open access
Semantic Scholar
The anti-oxidant capacity of green tea polyphenols in the oral cavity
M. Asim, Hang Liu, E. Okello, M. Birch-Machin +2 more
2013Proceedings of the Nutrition Society2 citations Open access
Semantic Scholar
Chapter 27:Medicinal Plants, Phytochemicals and Alzheimer's Disease
D. Kennedy, E. Wightman, E. Okello
20101 citations
Semantic Scholar
Phytopharmaceuticals for Dementia Therapy
E. Perry, E. Okello, M. Howes, P. Chazot
20091 citations
Semantic Scholar
Correction to: Tea consumption and measures of attention and psychomotor speed in the very old: the Newcastle 85+ longitudinal study
E. Okello, N. Mendonça, Blossom C. M. Stephan, G. Muniz-Terrera +2 more
2021BMC Nutrition0 citations Open access
Semantic Scholar

Frequent co-authors

Invite them to SciRah by sharing their profile.

D. Kennedy×8
Invite
D. Kennedy — researcher profile on SciRah
E. Wightman×6
Invite
E. Wightman — researcher profile on SciRah
M. Howes×6
Invite
M. Howes — researcher profile on SciRah
M. Siervo×6
Invite
M. Siervo — researcher profile on SciRah

×5

Invite

G. Port — researcher profile on SciRah

Invite

R. Shiel — researcher profile on SciRah

Invite

K. Wesnes — researcher profile on SciRah

Invite

E. Perry — researcher profile on SciRah

Suresh Kumar×4

Invite

Suresh Kumar — researcher profile on SciRah

Invite

C. Seal — researcher profile on SciRah

Invite

C. Haskell — researcher profile on SciRah

Sergey U. Savelev×3

Invite

Sergey U. Savelev — researcher profile on SciRah