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Showing 1–50 of 295 results

Advanced filters: Author: H. A. Sayed Clear advanced filters

Global, regional, and national burden of chronic respiratory diseases and impact of the COVID-19 pandemic, 1990–2023: a Global Burden of Disease study

Estimates from the Global Burden of Disease study reveal declines in chronic respiratory disease mortality between 1990 and 2023—especially during the COVID-19 pandemic—but the burdens on people affected remain substantial.

Jiyeon Oh
Soeun Kim
Dong Keon Yon
Research06 Jan 2026
Nature Medicine

Volume: 32, P: 197-223
A benchmark of expert-level academic questions to assess AI capabilities

Humanity’s Last Exam, a multi-modal benchmark at the frontier of human knowledge, is designed to be an expert-level closed-ended academic benchmark with broad subject coverage.

Long Phan
Alice Gatti
Davide Scaramuzza
ResearchOpen Access28 Jan 2026
Nature

Volume: 649, P: 1139-1146
Polyethylene nanoplastics intensify toxicity of potassium clavulanate in African catfish (Clarias gariepinus)

Walied A Kamel
Alaa El-Din H. Sayed
Heba Allah M. Elbaghdady
ResearchOpen Access03 Dec 2025
Scientific Reports

Volume: 15, P: 1-16
Utility of fluorescamine for spectrofluorimetric quantitation of berotralstat hydrochloride in spiked human plasma and content uniformity test and evaluation of method greenness

Hesham Salem
Mohamed Gamal Eldeen
Mahmoud Abdelgaleel
ResearchOpen Access12 Jan 2026
Scientific Reports

Volume: 16, P: 1-13
Bacterial chemolithotrophy in the ocean is associated with sinking particles

D. M. Karl
G. A. Knauer
B. B. Ward
Research03 May 1984
Nature

Volume: 309, P: 54-56
Integrated transcriptome analysis of jejunum and liver to identify key genes and pathways associated with body weight in chickens

El-Sayed M. Abdel-Kafy
Asmaa M. Elfiky
Wael A. H. Ali
ResearchOpen Access27 Jan 2026
Scientific Reports

Volume: 16, P: 1-17
Anemia prevalence in women of reproductive age in low- and middle-income countries between 2000 and 2018

Geospatial estimates of the prevalence of anemia in women of reproductive age across 82 low-income and middle-income countries reveals considerable heterogeneity and inequality at national and subnational levels, with few countries on track to meet the WHO Global Nutrition Targets by 2030.

Damaris Kinyoki
Aaron E. Osgood-Zimmerman
Simon I. Hay
ResearchOpen Access12 Oct 2021
Nature Medicine

Volume: 27, P: 1761-1782
A generalized fractional model for one-step identification of membrane filtration clogging mechanisms

Leila Cherifi
Yamina Ammi
Abdulrazak H. Almaliki
ResearchOpen Access19 Jan 2026
Scientific Reports

Volume: 16, P: 1-16
The gene-modulating power of Tannins isolated from Jatropha integerrima flowers on the transcriptomic profile of multidrug-resistant Klebsiella pneumoniae

Fatma S. Mahrous
Shimaa M. Khalifa
Mohamed Marzouk
ResearchOpen Access14 Jan 2026
Scientific Reports

Volume: 16, P: 1-14
Transient Incorporation of Methionine at the N-Terminus of Protamine Newly Synthesized in Trout Testis Cells

DONALD T. WIGLE
GORDON H. DIXON
Research15 Aug 1970
Nature

Volume: 227, P: 676-680
In vitro anti-inflammatory potential and in vivo anti-arthritis activities of Ximenia caffra extract on antigen-induced arthritis in rats

Mohammed Yosri
Alsayed E. Mekky
Basma H. Amin
ResearchOpen Access06 Jan 2026
Scientific Reports

Volume: 16, P: 1-13
Characterising acute and chronic care needs: insights from the Global Burden of Disease Study 2019

Chronic care manages long-term, progressive conditions, while acute care handles short-term ones. Here, authors show chronic conditions account for most of the global health burden, with 68% of DALYs and 93% of YLDs attributed to chronic care needs.

Cecilia Anza-Ramirez
J. Jaime Miranda
Yves Miel H. Zuniga
ResearchOpen Access07 May 2025
Nature Communications

Volume: 16, P: 1-36
Effect of Pyrophosphate on Hydroxyapatite and Its Implications in Calcium Homeostasis

H. FLEISCH
R. G. G. RUSSELL
F. STRAUMANN
Research26 Nov 1966
Nature

Volume: 212, P: 901-903
A New Fossil Human Population from the Wadi Halfa Area, Sudan

G. W. HEWES
H. IRWIN
A. SAXE
Research25 Jul 1964
Nature

Volume: 203, P: 341-343
Method of estimating Algal Production Rates at Sea

D. H. CUSHING
H. F. NICHOLSON
Research15 Oct 1966
Nature

Volume: 212, P: 310-311
Investigating sand dunes flora conservation based on remote sensing and predictive modeling in the Mediterranean coastal region, Egypt

Mohamed M. El-Khalafy
Wael Mostafa
Soliman M. Toto
ResearchOpen Access10 Dec 2025
Scientific Reports

Volume: 15, P: 1-22
Synthesis, spectral, thermal, and biological characterization of Se(IV) nanocomplexes derived from vitamin E and amino acid mixed ligands as a metal-drug model

Mohamed Y. El-Sayed
Ibrahim M. A. Alatawy
Kareem A. Asla
ResearchOpen Access23 Dec 2025
Scientific Reports

Volume: 16, P: 1-17
Mapping 123 million neonatal, infant and child deaths between 2000 and 2017

A high-resolution, global atlas of mortality of children under five years of age between 2000 and 2017 highlights subnational geographical inequalities in the distribution, rates and absolute counts of child deaths by age.

Roy Burstein
Nathaniel J. Henry
Simon I. Hay
ResearchOpen Access16 Oct 2019
Nature

Volume: 574, P: 353-358
The synergetic effects of 4-nonylphenol and polyethylene microplastics in Cyprinus carpio juveniles using blood biomarkers

Esraa Ammar
Mohamed Hamed
Alaa El-Din H. Sayed
ResearchOpen Access19 Jul 2023
Scientific Reports

Volume: 13, P: 1-12
Rosemary essential oil: chemical composition, antiviral, cytotoxicity, and in silico molecular docking analysis against tobacco mosaic virus

Abdulaziz A. Al-Askar
Karrar A. Hamzah
Ahmed Abdelkhalek
ResearchOpen Access14 Nov 2025
Scientific Reports

Volume: 15, P: 1-16
Impact of dietary pomegranate peel biochar on performance and economics of Nile tilapia (Oreochromis niloticus)

Shimaa Tarek Mohamed Kasseh
Ibrahim Mohamed Abaza
Essam Menshawy
ResearchOpen Access01 Dec 2025
Scientific Reports

Volume: 15, P: 1-15
Minimal effects of UVB radiation on Antarctic diatoms over the past 20 years

A. McMinn
H. Heijnist
D. Hodgson
Research18 Aug 1994
Nature

Volume: 370, P: 547-549
Regulatory alignment in FDA expedited pathways for infectious diseases: a decadal review with predictive modeling insights

Nguyen Thanh Tam
Ahmed M. Sayed
Nguyen Tien Huy
ResearchOpen Access13 Dec 2025
Scientific Reports

Volume: 16, P: 1-11
A multi-biomarker approach to assess the exposure effects of MPs and/or sodium lauryl sulfate on Clarias Gariepinus

Alyaa Elsayed
Hamdy A. M. Soliman
Alaa El-Din H. Sayed
ResearchOpen Access08 Dec 2025
Scientific Reports

Volume: 15, P: 1-15
Impact of dietary Phyllanthus emblica on growth, immunity, antioxidant capacity, and Fusarium oxysporum resistance in red tilapia

Roshmon Thomas Mathew
Yousef Ahmed Alkhamis
El-Sayed Hemdan Eissa
ResearchOpen Access27 Nov 2025
Scientific Reports

Volume: 15, P: 1-16
Low-frequency resonance Raman spectroscopy of the deoxyhaemoglobin transient of photolysed carboxyhaemoglobin

M. J. Irwin
G. H. Atkinson
Research24 Sept 1981
Nature

Volume: 293, P: 317-318
Probing ultrafast ππ*/nπ* internal conversion in organic chromophores via K-edge resonant absorption

Many photo-induced processes such as photosynthesis occur in organic molecules, but their femtosecond excited-state dynamics are difficult to track. Here, the authors exploit the element and site selectivity of soft X-ray absorption to sensitively follow the ultrafast ππ*/nπ* electronic relaxation of hetero-organic molecules.

T. J. A. Wolf
R. H. Myhre
M. Gühr
ResearchOpen Access22 Jun 2017
Nature Communications

Volume: 8, P: 1-7
Prefeeding of Clarias gariepinus with Spirulina platensis counteracts petroleum hydrocarbons-induced hepato- and nephrotoxicity

Alaa El-Din H. Sayed
Nasser S. Abou Khalil
Asmaa A. A. Hussein
ResearchOpen Access27 Mar 2024
Scientific Reports

Volume: 14, P: 1-12
Vitamin A Inhibition of Cortisol Induction of HeLa Alkaline Phosphatase

M. J. GRIFFIN
H. R. CAMA
Research21 Nov 1970
Nature

Volume: 228, P: 762-763
Latitudinal variations in plankton δ¹³C: implications for CO₂ and productivity in past oceans

Greg H. Rau
Taro Takahashi
David J. Des Marais
Research12 Oct 1989
Nature

Volume: 341, P: 516-518
GWAS identifies novel loci linked to seedling growth traits in highly diverse barley population under drought stress

Abdelfattah Badr
Hanaa H. El-Shazly
Helmy M Youssef
ResearchOpen Access24 Mar 2025
Scientific Reports

Volume: 15, P: 1-14
Electron spin resonance resolves intermediate triplet states in delayed fluorescence

Despite advances in the design of thermally activated delayed fluorescence (TADF) emitters for devices, the effect of spin interactions is not well understood. Here, the authors report the role of spin-vibronic coupling in TADF organic emitters using transient electron spin resonance spectroscopy.

Bluebell H. Drummond
Naoya Aizawa
Emrys W. Evans
ResearchOpen Access26 Jul 2021
Nature Communications

Volume: 12, P: 1-11
Endotoxin-induced uveitis in rats as a model for human disease

J. T. Rosenbaum
H. O. McDevitt
P. R. Egbert
Research07 Aug 1980
Nature

Volume: 286, P: 611-613
Bat Erosion as a Factor in Cave Formation

J. H. D. HOOPER
Research22 Nov 1958
Nature

Volume: 182, P: 1464
Processing of a minimal antigenic peptide alters its interaction with MHC molecules

Barbara S. Fox
Francis R. Carbone
Ronald H. Schwartz
Research11 Feb 1988
Nature

Volume: 331, P: 538-540
Mapping routine measles vaccination in low- and middle-income countries

Although progress in the coverage of routine measles vaccination in children in low- and middle-income countries was made during 2000–2019, many countries remain far from the goal of 80% coverage in all districts by 2019.

Alyssa N. Sbarra
Sam Rolfe
Jonathan F. Mosser
ResearchOpen Access16 Dec 2020
Nature

Volume: 589, P: 415-419
Testing the iron hypothesis in ecosystems of the equatorial Pacific Ocean

J. H. Martin
K. H. Coale
N. W. Tindale
Research08 Sept 1994
Nature

Volume: 371, P: 123-129
Experimental study of productivity enhancement in a humidification-dehumidification desalination system through various packing materials and configurations

Samah I. Hatab
Abdelrahman H. Abdel-sayed
Alaa K. Mubarak
ResearchOpen Access12 Nov 2025
Scientific Reports

Volume: 15, P: 1-25
Radiation risk

R. G. BUCKLEY
H. J. TRODAHL
Research05 Jul 1990
Nature

Volume: 346, P: 24
Evaluating the spatial pattern of water quality of the Nile River, Egypt, through multivariate analysis of chemical and biological indicators

Mahmoud H. Hegab
Seliem M. El Sayed
Abd-Ellatif M. Hussian
ResearchOpen Access04 Mar 2025
Scientific Reports

Volume: 15, P: 1-18
Radiation sensor based on a 1D-periodic structure infiltrated by (B-co-MP) a conjugated copolymer

Shimaa El-Shemy
R. Semeda
Arafa H. Aly
ResearchOpen Access27 Aug 2024
Scientific Reports

Volume: 14, P: 1-12
Mapping local patterns of childhood overweight and wasting in low- and middle-income countries between 2000 and 2017

Fine-scale geospatial mapping of overweight and wasting (two components of the double burden of malnutrition) in 105 LMICs shows that overweight has increased from 5.2% in 2000 to 6.0% in children under 5 in 2017. Although overall wasting decreased over the same period, most countries are not on track to meet the World Health Organization’s Global Nutrition Target of <5% in over half of LMICs by 2025.

Damaris K. Kinyoki
Jennifer M. Ross
Simon I. Hay
ResearchOpen Access20 Apr 2020
Nature Medicine

Volume: 26, P: 750-759
Enhanced separation of oil in water emulsions using PVDF composite membranes reinforced with graphene oxide doped titania and silica nanoparticles

Mahmoud F. Mubarak
Nawal Bahtiti
A. Ebada
ResearchOpen Access02 Sept 2025
Scientific Reports

Volume: 15, P: 1-17
Sustainable production of silver chloride nanoparticles from desert flora for biomedical applications with multifunctional biological activities

Bothena M.A. Eltayeb
Ezzat H. Elshazly
Abdel Kareem S. H. Mohamed
ResearchOpen Access23 Sept 2025
Scientific Reports

Volume: 15, P: 1-14
A new ensemble heart attack diagnosis (EHAD) model using artificial intelligence techniques

Bahaa El-Din Waleed
El-Sayed M. El-Kenawy
Asmaa H. Rabie
ResearchOpen Access15 Sept 2025
Scientific Reports

Volume: 15, P: 1-26
AHP VIKOR framework for selecting wind turbine materials with a focus on corrosion and efficiency

Sekar Kidambi Raju
Saravanan Natesan
El-Sayed M. El-kenawy
ResearchOpen Access14 Oct 2024
Scientific Reports

Volume: 14, P: 1-22
Progress towards elimination goals for viral hepatitis

Viral hepatitis is a global public health problem. In this Viewpoint, we asked a selection of scientists and clinicians working in the viral hepatitis field to provide their opinions on progress and pitfalls towards the 2030 viral hepatitis elimination goals.

Andrea L. Cox
Manal H. El-Sayed
Fabien Zoulim
Reviews23 Jul 2020
Nature Reviews Gastroenterology & Hepatology

Volume: 17, P: 533-542
Abscisic acid and guard cells of Commelina communis L.

C. ITAI
H. MEIDNER
J. R. HILLMAN
Research16 Feb 1978
Nature

Volume: 271, P: 652-653
A comparative study of low energy radiation response of AlAs, GaAs and GaAs/AlAs superlattice and the damage effects on their electronic structures

M. Jiang
H. Y. Xiao
X. T. Zu
ResearchOpen Access31 Jan 2018
Scientific Reports

Volume: 8, P: 1-15
Er³⁺: Yb³⁺ ions embedded ZnO nanostructure for photonic applications

H. A. El Meleegi
M. E. Sayed
I. K. Battisha
ResearchOpen Access12 Nov 2025
Scientific Reports

Volume: 15, P: 1-15

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