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Retinal capillary density among healthy Egyptian and South Asian students:an optical coherence tomography angiography study

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international Journal of Ophthalmology(English edition) 2025年第1期18卷 111-116页

作者： Abdussalam m Abdullatif Alimulhaq mohammad moamnlhaq Tamer A.macky Noha Ahmed Edris Department of Ophthalmology Kasr ElAini HospitalCairo UniversityCairo 1141Egypt

Aim:To compare the macular and optic nerve perfusion and vascular architecture using optical coherence tomography angiography(OCTA)in normal eyes of Egyptian(Caucasians)and South Asian(Asians)***:Cross-sectional analytical OCTA study performed on 90 eyes of South Asian(n=45)and Egyptians(n=45)were *** participants underwent bestcorrected visual acuity test,slit lamp,and fundus *** images;macular 6×6 mm^(2) grid and optic nerve 4.5×4.5 mm^(2) grid were used to examine the parafoveal and peripapillary regions,***:The mean capillary vessel density(CVD)in macular sectors among South Asians and Egyptians participants were(50.31%±2.53%,51.2%±5.93%)and(49.71%±3.6%,51.94%±4.79%)in superficial(SCP)and deep capillary plexuses(DCP),respectively(P>0.05).mean CVD in both groups was higher in DCP compared to SCP in all sectors but was not significant(P>0.05).mean foveal CVD increases with an increase in central retinal thickness in both SCP and DCP(Pmong both *** area of the foveal avascular zone(FAZ)was 0.28±0.09 and 0.27±0.08 mm2 in South Asian and Egyptians,*** area decreases with an increase in the thickness and foveal CVD(Pmean CVD in the peripapillary area was 48.23%±5.78% in South Asian and 49.52%±2.38% in Egyptian *** mean retinal nerve fiber layer thickness was found to be higher in the nasal quadrant among South Asian females than the Egyptian females(PiON:No significant racial disparity is found in this *** findings are helpful for assessing and improving the normative data on the differences in South Asian and Egyptian populations.

关键词： South Asian Egyptian optical coherence tomography angiography macular perfusion peripapillary vessel flow density

Differences in Seedling and Sapling Densities and Species Composition between Canopy Gaps and Forest Understories in a Subtropical Forest in Bangladesh

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Journal of Resources and Ecology 2025年第1期16卷 105-114页

作者： Tarit Kumar BAUL Anwarul islam chowdhury md Jamal UDDiN mohammad Kamrul HASAN Tapan Kumar NATH Lars Holger SCHmiDT institute of Forestry and Environmental Sciences University of ChittagongChittagong 4331Bangladesh Faculty of Science Forestry and TechnologySchool of Forest SciencesUniversity of Eastern FinlandJoensuu 80101Finland Department of Agricultural and Forest Sciences and Engineering University of LleidaLleida 25001Spain Natural Resources institute Finland(Luke) Helsinki 00790Finland Faculty of Science and Engineering University of Nottingham MalaysiaJalan Broga 43500Malaysia Department of Geoscience and Natural Resource management University of CopenhagenFrederiksberg C 1958Denmark

Canopy openings have a vital role in forest structure,regeneration,and plant *** this study,we investigated and compared the species composition and densities of seedlings and saplings between canopy gaps(openings)and forest understories(in dense canopies)in a sub-tropical forest of *** objectively identified 42 canopy openings between transect lines and 42 main plots in dense canopies,sampled for regeneration and young tree *** the regeneration study,we placed 2 m×2 m four subplots in each canopy opening and the main plot of dense canopy,thus making a total of 336 *** species diversity of seedlings,saplings,and trees were significantly(P≤0.05)higher in the dense canopy than in the canopy ***,most dominant and frequent regenerating species such as Diospyros pilosula,Garcinia cowa,Brownlowia elata,and Lithocarpus polystachya were common in both dense canopy and openings,the canopy openings had the highest importance Value index,suggesting the significance of gap dynamics in the dominance of native floral *** dense canopy played an important role in forest compositions because 12 regenerating species,including Stereospermum suaveolens and Diospyros montana,were not found in the canopy openings,implying that rain forests must maintain a high canopy cover for regeneration.

关键词： canopy opening disturbance forest dynamics native flora seedling sapling

Planar structure of organic photodetector for low dark current

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Chinese Physics B 2025年第2期34卷 290-295页

作者： mohammad Nofil Amirul Ashraf md Sabri Fadlan Arif Natashah Tahani m Bawazeer mohammad S Alsoufi Nur Adilah Roslan Azzuliani Supangat Low Dimensional materials Research Centre Department of PhysicsFaculty of ScienceUniversiti MalayaKuala Lumpur50603Malaysia Department of Chemistry Faculty of Applied ScienceUmm Al-Qura UniversityMakkahSaudi Arabia mechanical Engineering Department College of Engineering and Islamic ArchitectureUmm Al-Qura UniversityMakkahSaudi Arabia Department of Physics Faculty of ScienceUniversiti Putra MalaysiaSerdang43400Malaysia

The focus of this study is on investigating the vanadyl 2,9,16,23-tetraphenoxy-29H, 31H-phthalocyanine(VOPc Ph O)and its blend with o-xylenyl C60 bis-adduct(OXCBA), for use as a lateral ultraviolet organic photodetector. The research focuses on improving dark current reduction, which is a challenge in lateral organic photodetector. By integrating the OXCBA, low dark current values of 4.83 nA·cm^(-2)(D_(shot)^(*)= 1.414 × 10^(11)Jones) have been achieved as compared to the stand-alone VoPcPhO device of 14.06 nA·cm^(-2). The major contributing factors to dark current reduction are due to the efficient charge transfer at the photoactive-electrode interface, the deep highest occupied molecular orbital(HOmO)level of OXCBA, which leads to favorable energy level alignments hindering hole injection, and the occurrence of bulk heterojunction vertical phase segregation between VOPcPhO and OXCBA. These findings shed light on the relationship between the organic photoconductor's material composition, morphology, and performance metrics and open new avenues for metal phthalocyanine-based lateral ultraviolet organic photodetectors with low dark current and enhanced performance.

关键词： small molecule dark current ultra-violet(UV)sensor device physics

Effects of rare-earth Pr3+-Dy3+ doping on structural,magnetic,optical and dielectric properties of Zn2Y hexaferrite

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Journal of Rare Earths 2025年第2期43卷 329-336页

作者： ibrahim mohammed mohamed E.El Sayed Ali Shawabkeh mohammad N.murshed ibtehaj F.Alshdoukhi Zeinhom m.El-Bahy J.mohammed A.K.Srivastava Department of Physics Lovely Professional University Department of Science Technology Waziri Umaru Federal Polytechnic Birnin Kebbi Physics Department Faculty of Science and ArtsKing Khalid University College of Engineering and Technology American University of the Middle East Department of Basic Sciences College of Science and Health ProfessionsKing Saud Bin Abdulaziz University for Health ScienceKing Abdullah International Medical Research Center Department of Chemistry Faculty of ScienceAl-Azhar University Department of Physics Faculty of ScienceFederal University Dutse

This study was conducted to investigate the properties of Pr3+-Dy3+doped Zn2Y-type hexaferrite for potential technological applications.X-ray diffraction（XRD）,Fourier transform infrared spectroscopy（FTiR） and field-emission scanning electron microscopy（FESEm） were used to analyze structural *** crystallite size in the synthesized samples varies between 57.54 and 68.57 *** vibrational bands at 400 and 600 cm-1,common to all hexaferrites,were confirmed through *** FESEm analysis reveals an agglomeration of magnetic grains and a decrease in the average grain size from 1.24 to1.06 μ*** m-H loops show that,with x values of 0.0,0.1,and 0.2,the saturation magnetization is determined to be 34.76,34.23,and 32.52 emu/g,*** corresponding coercivity values are21.24,30.39,and 33.99 ***-visible spectroscopy using Tauc theory reveals an increase in the optical band gap from 2.32 to 2.50 eV,indicating a tunable energy band structure by incorporating Pr3+-Dy3+*** dielectric constant increases,whereas AC conductivity decreases with increased Pr3+-Dy3+*** obtained results suggest the potential suitability of these materials for various technological applications.

关键词： Dielectric constant magnetic hysteresis Optical band gap Pr3+-Dy3+ Rare earths Zn2Y-type hexaferrite

Rainfall-induced wind erosion in soils stabilized with alkali-activated waste materials

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Journal of Rock mechanics and Geotechnical Engineering 2025年第1期17卷 465-480页

作者： Alireza Komaei Abbas Soroush Seyed mohammad Fattahi Hesam Ghanbari Department of Civil and Environmental Engineering Amirkabir University of TechnologyTehran159163431Iran

This study evaluates the efficacy of sustainable erosion control using slag-based alkali-activated cement crusts under varying rainfall and wind conditions. The rainfall intensities ranged from 30 mm/h to 120 mm/h, with durations ranging from 15 min to 90 min, and crust slopes of ∼2° (gentle) and 30° (steep). Wind tunnel experiments were conducted at wind velocities of 14 m/s, 21 m/s, and 28 m/s to investigate post-rainfall wind erodibility, along with changes in crust strength and microstructure analysis. The findings show the development of hydrated cementitious phases in alkali-activated material, which form around and between the particles during the alkaline activation process. Alkali-activated cement crusts significantly reduced erosion caused by rainfall and subsequent wind by several orders of magnitude. At the highest rainfall intensity of 120 mm/h, rainfall erosion was measured to be 1654.81 kg/m2 for untreated samples and 0.89 kg/m2 for treated samples, demonstrating a substantial 99.95% reduction in erosion due to the treatment. Similarly, at the highest wind speed tested, wind erosion was 122.75 kg/m2 for untreated samples and 0.095 kg/m2 for treated samples, indicating a significant 99.92% reduction in erosion due to the formation of an alkali-activated cement crust on the soil surface. However, exposure of the samples to 120 mm/h rainfall for 90 min resulted in a 5.2-fold increase in wind erosion compared to pre-rainfall conditions. Similarly, penetrometer results indicated a 37%–54% reduction in post-rainfall surface strength.

关键词： Rainfall erosion Alkali-activated material Wind erosion Crust formation

improving irrigation management in wheat farms through the combined use of the AquaCrop and WinSRFR models

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Journal of Arid Land 2025年第2期17卷 245-258页

作者： Arash TAFTEH mohammad R EmDAD Azadeh SEDAGHAT Department of irrigation and Soil Physics Soil and Water Research InstituteAgricultural Research Education and Extension Organization(AREEO)Karaj 31587-77871Iran

Water is essential for agricultural production;however,climate change has exacerbated drought and water stress in arid and semi-arid areas such as *** these challenges,irrigation water efficiency remains low,and current water management schemes are ***,iranian crops suffer from low water productivity,highlighting the urgent need for enhanced productivity and improved water management *** this study,we investigated irrigation management conditions in the Hamidiyeh farm,Khuzestan Province,iran and used the calibrated AquaCrop and WinSRFR(a surface irrigation simulation model)models to reflect these ***,we examined different management scenarios using each model and evaluated the results from the second *** findings demonstrated that combining simulation of the AquaCrop and WinSRFR models was highly effective and could be employed for irrigation management in the *** AquaCrop model accurately simulated wheat yield in the first year,being 2.6 t/hm^(2),which closely aligned with the measured yield of 3.0 t/hm^(2).Additionally,using the WinSRFR model to adjust the length of existing borders from 200 to 180 m resulted in a 45.0%increase in efficiency during the second *** enhance water use efficiency in the field,we recommended adopting borders with a length of 180 m,a width of 10 m,and a flow rate of 15 to 18 L/*** AquaCrop and WinSRFR models accurately predicted border irrigation conditions,achieving the highest water use efficiency at a flow rate of 18 L/*** these models increased farmers'average water consumption efficiency from 0.30 to 0.99 kg/m^(3)in the second ***,the results obtained from the AquaCrop and WinSRFR models are within a reasonable range and consistent with international *** adjustment is projected to improve the water use efficiency in the field by approximately 45.0%when utilizing the border irrigation ***,integrating these two

关键词： AquaCrop crop modeling WinSRFR water management water use efficiency

A Boundary-Type meshless method for Traction identification in Two-Dimensional Anisotropic Elasticity and investigating the Effective Parameters

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Computers, materials & Continua 2025年第2期82卷 3069-3090页

作者： mohammad-Rahim Hematiyan School of mechanical Engineering Shiraz UniversityShiraz71936Iran

The identification of the traction acting on a portion of the surface of an anisotropic solid is very important in structural health monitoring and optimal design of structures. The traction can be determined using inverse methods in which displacement or strain measurements are taken at several points on the body. This paper presents an inverse method based on the method of fundamental solutions for the traction identification problem in two-dimensional anisotropic elasticity. The method of fundamental solutions is an efficient boundary-type meshless method widely used for analyzing various problems. Since the problem is linear, the sensitivity analysis is simply performed by solving the corresponding direct problem several times with different loads. The effects of important parameters such as the number of measurement data, the position of the measurement points, the amount of measurement error, and the type of measurement, i.e., displacement or strain, on the results are also investigated. The results obtained show that the presented inverse method is suitable for the problem of traction identification. it can be concluded from the results that the use of strain measurements in the inverse analysis leads to more accurate results than the use of displacement measurements. it is also found that measurement points closer to the boundary with unknown traction provide more reliable solutions. Additionally, it is found that increasing the number of measurement points increases the accuracy of the inverse solution. However, in cases with a large number of measurement points, further increasing the number of measurement data has little effect on the results.

关键词： Traction identification inverse method anisotropic elasticity load identification method of fundamental solutions measurement location

COViD-19's impact on heart and lung transplantation:Citation-based analysis of research output

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World Journal of Transplantation 2025年第2期15卷 328-336页

作者： Nisreen Yaghmour Dina Alramini mohammad Alsarayrah mohammad Abuassi Awn Al-Rameni mohammad Aladaileh Haneen Al-Abdallat Badi Rawashdeh Department of Cardiology MercyOne Iowa Heart CenterDes MoinesIO 52302United States Department of Cardiothoracic Surgery University of ArizonaTucsonAZ 85702United States Department of Vascular Surgery University of North CarolinaChapel HillNC 27599United States Department of internal medicine Jordan HospitalAmman 00962Al jamaimahJordan Department of internal medicine University of JordanAmman 11698Al jamaimahJordan Department of Thoracic Surgery University of FloridaGainesvilleFL 32605United States Department of medicine Jordan University HospitalAmman 11263Al jamaimahJordan Department of Transplant Surgery Medical College of WisconsinMilwaukeeWI 53202United States

BACKGROUND Since being declared as a pandemic on march 11,2020,coronavirus disease 2019(COViD-19)has profoundly influenced heart and lung transplant programs,impacting donor availability,patient management,and healthcare *** study offers a citation-based review of the research output on this subject,seeking to understand how the transplant community has responded to these *** a review of literature from the beginning of the pandemic to early 2023,we evaluate the shifts in academic emphasis and the emerging trends in heart and lung transplantation during the COViD-19 *** To assess the impact of COViD-19 on heart and lung transplantation research,highlighting key themes,contri-butions,and trends in the literature during the *** We conducted an extensive search of the Web of Science database on February 9,*** employed the terms"transplant"and"transplantation",as well as organ-specific terms like"heart","cardiac",and"lung",combined with COViD-19-related terms such as"COViD-19","coronavirus",and"SARS-CoV-2".The search encompassed public-ations from march 11,2020 to February 9,*** on authors,journals,countries,institutions,and publication types(articles,reviews,conference papers,letters,notes,editorials,brief surveys,book chapters,and errata)were *** data was visualized and processed with VOSviewer 1.6.18 and *** We included 847 research *** were 392 articles(46.3%)and 88 reviews(10.3%).The studies included were referenced 7757 times,with an average of 9.17 citations per *** majority of the publications(n=317)were conducted by institutes from the United States with highest citations(n=4948)on this subject,followed by Germany,italy,and *** majority of papers(n=101)were published in the Journal of Heart and Lung *** To the fullest extent of our knowledge,this is the first bibliometric study of COViD-19's impact on heart and lung transplantation to offer a

关键词： COViD-19 Pandemic Heart transplant Lung transplant Bibliometric analysis

Exogenous melatonin enhances heat stress tolerance in sweetpotato by modulating antioxidant defense system,osmotic homeostasis and stomatal traits

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Horticultural Plant Journal 2025年第1期11卷 431-445页

作者： Sunjeet Kumar Rui Yu Yang Liu Yi Liu mohammad Nauman Khan Yonghua Liu mengzhao Wang Guopeng Zhu School of Breeding and multiplication(Sanya institute of Breeding and multiplication) Hainan UniversitySanyaHainan 572025China Key Laboratory for Quality Regulation of Tropical Horticultural Crops of Hainan Province Hainan UniversityHaikouHainan 570228China

Heat stress hinders the growth and productivity of sweetpotato plants,predominantly through oxidative damage to cellular ***,the development of efficient approaches for mitigating heat-related impairments is essential for the long-term production of *** has been recognised for its capacity to assist plants in dealing with abiotic stress *** research aimed to investigate how different doses of exogenous melatonin influence heat damage in sweetpotato *** stress drastically affected shoot and root fresh weight by 31.8 and 44.5%,*** reduction resulted in oxidative stress characterised by increased formation of hydrogen peroxide(H_(2)O_(2))by 804.4%,superoxide ion(O_(2)^(·-))by 211.5%and malondialdehyde(mDA)by 234.2%.Heat stress also reduced chlorophyll concentration,photosystemⅡefficiency(F_v/F_m)by 15.3%and gaseous ***,pre-treatment with 100μmol L^(-1)melatonin increased growth and reduced oxidative damage to sweetpotato plants under heat *** particular,melatonin decreased H_(2)O_(2),O_(2)^(·-)and mDA by 64.8%,42.7%and 38.2%,*** also mitigated the decline in chlorophyll levels and improved stomatal traits,gaseous exchange and F_(v)/F_(m)(13%).Results suggested that the favorable outcomes of melatonin treatment can be associated with elevated antioxidant enzyme activity and an increase in non-enzymatic antioxidants and ***,these findings indicate that exogenous melatonin can improve heat stress tolerance in *** stu dy will assist re searchers in further investigating how melatonin makes sweetpotatoes more resistant to heat stress.

关键词： Sweetpotato Heat stress melatonin Oxidative damage Antioxidant defense system Stomatal traits