Kuwait Journal of Science最新文献_第3页

Green synthesis and characterisation of silver nanoparticles (AgNPs) from Rubus sanctus schreber leaf aqueous extract and evaluation of their antibacterial and cytotoxic activities 山楂叶水提物纳米银的绿色合成、表征及其抗菌和细胞毒活性评价

IF 1.2 4区综合性期刊

Kuwait Journal of Science Pub Date : 2025-03-28 DOI: 10.1016/j.kjs.2025.100416

Hülya Hoşgören

{"title":"Green synthesis and characterisation of silver nanoparticles (AgNPs) from Rubus sanctus schreber leaf aqueous extract and evaluation of their antibacterial and cytotoxic activities","authors":"Hülya Hoşgören","doi":"10.1016/j.kjs.2025.100416","DOIUrl":"10.1016/j.kjs.2025.100416","url":null,"abstract":"<div><div>The current study optimised the numerous experimental parameters required for the generation and stability of silver nanoparticles (AgNPs) by the green synthesis of AgNP utilizing aqueous <em>Rubus sanctus</em> leaf extract. By employing UV–visible analysis to find the surface plasmon resonance band at 436.5 nm, the creation of nanoparticles was verified. Based on the Fourier transform infrared spectroscopy (FT-IR), the phytochemical components present in the leaf extract of <em>Rubus sanctus</em> significantly impacted the synthesis of AgNPs as a bio-reducing agent. The shape, size, and elemental composition of AgNPs were examined using X-ray diffraction (XRD), energy dispersive X-ray (EDX), scanning electron microscope (SEM), and transmission electron microscope (TEM), and the results showed that the particles were crystalline, spherical silver nanoparticles. Additionally, AgNPs' inhibitory effects on the growth of pathogenic <em>Staphylococcus aureus</em>, <em>Bacillus subtilis</em>, <em>Escherichia coli</em>, <em>Pseudomonas aeruginosa</em> bacteria, and <em>Candida albicans</em> yeast were evaluated using the microdilution technique. The results showed that nanoparticles worked even at low concentrations. To test the cytotoxicity of biosynthesised AgNPs, three cancer cell lines, the prostate (LnCap), breast (MDA-MB231), and colon (Caco2), as well as a healthy human embryonic kidney (HEK293) cell line, were used. At high dosages, it was observed that <em>Rubus sanctus</em>-AgNPs had potent cytotoxic activity on the cancer cell lines LnCap, MDA-MB231, and Caco2, but their cytotoxicity was less on the control HEK293 cell line. From the data, it can be inferred that biogenic AgNPs were functionalised, and these compounds demonstrated significant potential as antibacterial and anti-cancer agents for industrial and medical applications.</div></div>","PeriodicalId":17848,"journal":{"name":"Kuwait Journal of Science","volume":"52 3","pages":"Article 100416"},"PeriodicalIF":1.2,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143817592","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Turning waste into value: Banana peel biochar particle electrode boost methyl violet 2B dye removal in 3D-electrochemical system 变废为利：香蕉皮生物炭颗粒电极在3d -电化学系统中促进甲基紫2B染料的去除

IF 1.2 4区综合性期刊

Kuwait Journal of Science Pub Date : 2025-03-27 DOI: 10.1016/j.kjs.2025.100413

Syed Madhi Haider Kazmi , Jiangkun Du , Atya Hassan , Zhao Xu , Muhammad Faheem , Owais Ahmed Waseem , Muhammad Yousuf

{"title":"Turning waste into value: Banana peel biochar particle electrode boost methyl violet 2B dye removal in 3D-electrochemical system","authors":"Syed Madhi Haider Kazmi , Jiangkun Du , Atya Hassan , Zhao Xu , Muhammad Faheem , Owais Ahmed Waseem , Muhammad Yousuf","doi":"10.1016/j.kjs.2025.100413","DOIUrl":"10.1016/j.kjs.2025.100413","url":null,"abstract":"<div><div>Water-soluble cationic dyes pose significant risks to human health and aquatic ecosystems. However, conventional adsorbents and removal techniques are ineffective in eliminating them from wastewater. To address this challenging issue, we synthesized banana peel biochar (BPB) and unveiled its role as a particle electrode for the removal of carcinogenic methyl violet 2B dye (MV 2B) in a cutting-edge three-dimensional electrochemical system with the use of titanium (Ti) anode and graphite (GP) cathode (BPB–Ti/GP). Catalytic features of the BPB were explored and its electrochemical characteristics were studied through linear sweep voltammetry and cyclic voltammetry revealed a high oxygen evolution potential (OEP) of 1.86 V. High OEP of BPB particle electrode induced the MV 2B dye oxidation by reducing the oxygen evolution side reaction (OER) of the electrochemical system. At optimum operating conditions of the current density (<em>j</em>) of 5.2 mA/cm<sup>2</sup>, pH 9.0, and Na<sub>2</sub>SO<sub>4</sub> dose of 0.2 M, nearly 99.50 % of 10 mg/L MV 2B dye removal was attained in 40 min of electrolysis time. Compared to the BPB-Ti/GP system, the system with commercial particle electrodes (GAC, MnO<sub>2</sub>, and Fe<sub>3</sub>O<sub>4</sub>) showed no significant performance. Energy consumption and electrical energy per order of BPB-Ti/GP system was also calculated. Furthermore, hydroxyl radical (<sup>•</sup>OH) was identified as the dominant reactive oxygen species. Moreover, liquid chromatography-mass spectroscopy analysis showed that MV 2B underwent degradation through N-demethylation. This unique approach does not only reduce agricultural waste but also induce the sustainability of wastewater treatment processes, paving the way for greener environmental solutions.</div></div>","PeriodicalId":17848,"journal":{"name":"Kuwait Journal of Science","volume":"52 3","pages":"Article 100413"},"PeriodicalIF":1.2,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hydrophilic vs. amphiphilic anionic Zn(II) phthalocyanines for photodynamic therapy 亲水与两亲性阴离子锌（II）酞菁用于光动力治疗

IF 1.2 4区综合性期刊

Kuwait Journal of Science Pub Date : 2025-03-27 DOI: 10.1016/j.kjs.2025.100415

Nouf S. Al-Hamdan , Ethar S. Makhseed , Ali Husain , Efkan Bağda , Esra Bağda , Didem Duman , Ebubekir Ayhan , Asaithampi Ganesan , Mahmut Durmuş , Saad Makhseed

{"title":"Hydrophilic vs. amphiphilic anionic Zn(II) phthalocyanines for photodynamic therapy","authors":"Nouf S. Al-Hamdan , Ethar S. Makhseed , Ali Husain , Efkan Bağda , Esra Bağda , Didem Duman , Ebubekir Ayhan , Asaithampi Ganesan , Mahmut Durmuş , Saad Makhseed","doi":"10.1016/j.kjs.2025.100415","DOIUrl":"10.1016/j.kjs.2025.100415","url":null,"abstract":"<div><div>Two sets of water-soluble zinc (II) phthalocyanines (Zn[II]Pcs) were synthesized and examined for use as photosensitizers in photodynamic therapy. These Zn(II)Pcs contained numerous negatively charged electron-withdrawing carboxylic acid substituents in a rigid arrangement at peripheral positions, subsequently converted into sodium salts. Additionally, the impact of the number and distribution of charged groups on the planar hydrophobic core was examined to assess their influence on the photophysical properties and self-aggregation behavior of the Pcs in an aqueous media. The photophysical findings indicate that the amphiphilic macrocycles (<strong>2A</strong>, <strong>3A</strong>, and <strong>4A</strong>) produce more singlet oxygen than the hydrophilic ones (<strong>2H</strong>, <strong>3H</strong>, and <strong>4H</strong>) in DMF. The photodynamic activity of sodium salts of Zn(II)Pcs bearing anionic substituents (compounds <strong>4A</strong> and <strong>4H</strong>) was evaluated <em>in vitro</em> against oral squamous cell carcinoma (SCC-9) and mouse fibroblast (L-929) cell lines to help elucidate the cell death mechanism. The results confirmed that <strong>4A</strong> exhibits high selectivity and efficiency in causing phototoxicity, with an IC<sub>50</sub> value of around 3.8 μM. This work provides new insights into the advanced development of dual-directional ZnPc-based photodynamic therapy agents for treating oral squamous cell cancer.</div></div>","PeriodicalId":17848,"journal":{"name":"Kuwait Journal of Science","volume":"52 3","pages":"Article 100415"},"PeriodicalIF":1.2,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Environmental implications of geohazard analysis in a climatically variable arid region: A case study of the Al-Mutla’a-Al-Jahra Coastal Plain, State of Kuwait 气候变化干旱地区地质灾害分析的环境影响：以科威特Al-Mutla 'a-Al-Jahra沿海平原为例

IF 1.2 4区综合性期刊

Kuwait Journal of Science Pub Date : 2025-03-27 DOI: 10.1016/j.kjs.2025.100414

Esraa S. Bu Hamad , Mohamed I. El Anbaawy , Faisal A.N. AlSharifi , Mohamed S. Hammed , Ahmed Abdelhalim

{"title":"Environmental implications of geohazard analysis in a climatically variable arid region: A case study of the Al-Mutla’a-Al-Jahra Coastal Plain, State of Kuwait","authors":"Esraa S. Bu Hamad , Mohamed I. El Anbaawy , Faisal A.N. AlSharifi , Mohamed S. Hammed , Ahmed Abdelhalim","doi":"10.1016/j.kjs.2025.100414","DOIUrl":"10.1016/j.kjs.2025.100414","url":null,"abstract":"<div><div>This study addresses the pressing need for integrated environmental management in Kuwait's central coastal arid zone, which faces increasing environmental challenges due to extensive human activities and climate change. The research employs remote sensing (RS), geographic information systems (GIS), land use and land cover (LU/LC) change detection, watershed analysis, and fieldwork to assess both regional paleo-drainage systems and local basins. The findings identify Al-Jahra and Al-Mutlla'a as areas highly susceptible to flash flooding and Al-Mutlla'a to sand encroachment. Morphometric analysis indicates that regional basins such as B2, B3, and B4 exhibit moderate drainage densities (0.37–4.9) and elongated shapes, which mitigate flash flood risks. In contrast, local basins like Jal-Az-Zor and Jal-Al-Atraf have higher drainage densities (1.9–2.4), steep slopes (>45°), and elevated relief ratios (19.13–20.4), making them more vulnerable to flash floods and erosion. Urbanization analysis reveals a 33.7 % expansion in urban areas between 1986 and 2021, with a notable acceleration from 2013 to 2021 at a rate of 10 km<sup>2</sup> per year. Additionally, sand movement and land-use changes have heightened landscape instability, particularly in inland desert dune fields, which remain highly dynamic. The findings highlight the need for tailored land management policies, including proposed trenching projects around Al-Jahra and integrated environmental management plans to enhance resilience against these hazards and support sustainable development.</div></div>","PeriodicalId":17848,"journal":{"name":"Kuwait Journal of Science","volume":"52 3","pages":"Article 100414"},"PeriodicalIF":1.2,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143747150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bagging-based heteroscedasticity-adjusted ridge estimators in the linear regression model 线性回归模型中基于bagging的异方差调整脊估计

IF 1.2 4区综合性期刊

Kuwait Journal of Science Pub Date : 2025-03-26 DOI: 10.1016/j.kjs.2025.100412

Maha Shabbir , Sohail Chand , Irum Sajjad Dar

{"title":"Bagging-based heteroscedasticity-adjusted ridge estimators in the linear regression model","authors":"Maha Shabbir , Sohail Chand , Irum Sajjad Dar","doi":"10.1016/j.kjs.2025.100412","DOIUrl":"10.1016/j.kjs.2025.100412","url":null,"abstract":"<div><div>The existence of multicollinearity between independent variables and heteroscedastic error has a colossal impact on the performance of the ordinary least square (OLS) estimator and its covariance matrix. In this study, new bootstrap aggregation (i.e. bagging) based ridge estimators are introduced to circumvent multicollinearity by controlling the influence of heteroscedastic error terms. These estimators are a novel combination of bagging and heteroscedastic-adjusted ridge (HAR) estimators. The performance of bagging-based HAR estimators is evaluated using intensive Monte Carlo simulations by considering multicollinearity with low, high, and severe degrees of heteroscedasticity. The findings reveal that at severe heteroscedasticity, the performance of the proposed HAR-HK∗, HAR-LW∗, HAR-HSL∗, and HAR-KMS∗ estimators is 26.3 %, 81.5 %, 90.1 %, and 30.5 % better than their HAR-HK, HAR-LW, HAR-HSL, and HAR-KMS counterparts when the collinearity level is 0.80, sample size is 25, and the number of independent variables is 5. Similar improvements are observed when heteroscedasticity levels are low and moderate, with different specifications for sample size, collinearity level, and number of independent variables. Overall, the bagging-based HAR estimators are efficient and perform better than the baseline HAR estimators. The real-life applications are illustrated using livestock and passenger car mileage data. The outcomes show that the suggested HAR-LW∗ (PRESS = 10.5028) and HAR-KMS∗(PRESS = 0.0497) perform best on the passenger car and livestock data respectively. The improvements will be helpful in efficiently handling the estimation problem when the two challenging issues are present in the data.</div></div>","PeriodicalId":17848,"journal":{"name":"Kuwait Journal of Science","volume":"52 3","pages":"Article 100412"},"PeriodicalIF":1.2,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143724929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural and thermoelectric properties of Ag doped (Ca2Co2O5) Ag掺杂（Ca2Co2O5）的结构和热电性能

IF 1.2 4区综合性期刊

Kuwait Journal of Science Pub Date : 2025-03-25 DOI: 10.1016/j.kjs.2025.100410

Khan Karim, Muhammad Fahim, Jan Sher Khan, Rizwan Akram, Saima Rafique, Mozaffar Hussain, Muhammad Raza Hussain, Junaid Ahmed Khan

{"title":"Structural and thermoelectric properties of Ag doped (Ca2Co2O5)","authors":"Khan Karim, Muhammad Fahim, Jan Sher Khan, Rizwan Akram, Saima Rafique, Mozaffar Hussain, Muhammad Raza Hussain, Junaid Ahmed Khan","doi":"10.1016/j.kjs.2025.100410","DOIUrl":"10.1016/j.kjs.2025.100410","url":null,"abstract":"<div><div>Phase controlled silver doped calcium cobalt oxide Ca<sub>2</sub>Co<sub>2-x</sub>Ag<sub>x</sub>O<sub>5</sub>, x = (0,0.04,0.08,0.12), was synthesized in the present work by the sol-gel method. X-ray diffraction (XRD) confirmed the synthesis of pure Ca<sub>2</sub>Co<sub>2</sub>O<sub>5</sub> and the doping of silver in orthorhombic calcium cobalt oxide. Theoretical modeling of XRD verified the doping, with both experimental and theoretical results indicating peak shifting toward lower angle. To check the morphology and nano-scale porosity of the sintered samples, scanning electron microscopy (SEM) was employed. Silver doping significantly increased electrical conductivity due to an increase in carrier concentration, which was optimum at x = 0.12. Alongside this, composition exhibited a notable reduction in thermal conductivity due to defects in the crystal structure. Moreover, the Seebeck coefficient was slightly decreased due to an increase in the charge carrier. As a result, in the current study, the thermoelectric figure of merit (<em>zT</em>) demonstrated a notable enhancement of 29 % as compared to pure Ca<sub>2</sub>Co<sub>2</sub>O<sub>5</sub> at 820 K.</div></div>","PeriodicalId":17848,"journal":{"name":"Kuwait Journal of Science","volume":"52 3","pages":"Article 100410"},"PeriodicalIF":1.2,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143716099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Water quality in the macro-tidal Kampar estuary, Indonesia: Real-time measurement during significant tidal bore passages 印度尼西亚坎帕河口大潮汐的水质：在重要潮汐通道期间的实时测量

IF 1.2 4区综合性期刊

Kuwait Journal of Science Pub Date : 2025-03-20 DOI: 10.1016/j.kjs.2025.100409

Ulung Jantama Wisha , Yusuf Jati Wijaya , Yukiharu Hisaki

{"title":"Water quality in the macro-tidal Kampar estuary, Indonesia: Real-time measurement during significant tidal bore passages","authors":"Ulung Jantama Wisha , Yusuf Jati Wijaya , Yukiharu Hisaki","doi":"10.1016/j.kjs.2025.100409","DOIUrl":"10.1016/j.kjs.2025.100409","url":null,"abstract":"<div><div>The limited environmental study in the tidal bore-affected estuaries raises a big question about the significant influence of tidal bore on increasing the risk of water quality degradation and eutrophication in the estuarine area. This study attempts to determine the influence of the flood-ebb cycle on the water quality and nutrient variability in the Kampar estuary. We employed the water quality index (WQI) and eutrophication index (EI) to examine the water quality and trophic status within the bore-affected Kampar estuary. Statistical-based assessments were also performed. The results show that temperature, salinity, pH, and dissolved oxygen (DO) were more variable as the bore propagated. While considerable N- and P-nutrients and chlorophyll-a concentration characterized the study area with a seesaw mechanism, resulting in poor water quality (WQI <50) and high eutrophication level (EI > 1.5) downstream. However, the eutrophication is also high upstream despite the moderate water quality. The EI variation significantly correlates with the flood-ebb cycles indicated by the variation in tidal bore height (<em>r</em> = 0.65 and PC1 loading value of about 0.4), and these factors most likely characterize the estuarine zone. The tendency of riverine water acidification (pH ≤ 5) during the ebb tide is of particular concern in the study area, indicating the tremendous anthropogenic contributions to deteriorating the water condition. Regular monitoring and more aggressive action are needed to control water pollution in the Kampar River for sustainable water resources.</div></div>","PeriodicalId":17848,"journal":{"name":"Kuwait Journal of Science","volume":"52 3","pages":"Article 100409"},"PeriodicalIF":1.2,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143698130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Molecular cloning, characterization and expression analysis of cinnamate 4-hydroxylase (C4H) from Ferula pseudalliacea 伪阿魏肉桂酸4-羟化酶的克隆、表征及表达分析

IF 1.2 4区综合性期刊

Kuwait Journal of Science Pub Date : 2025-03-19 DOI: 10.1016/j.kjs.2025.100407

Pegah Shahidi , Bahman Bahramnejad , Yavar Vafaee , Dara Dastan , Parviz Heidari

{"title":"Molecular cloning, characterization and expression analysis of cinnamate 4-hydroxylase (C4H) from Ferula pseudalliacea","authors":"Pegah Shahidi , Bahman Bahramnejad , Yavar Vafaee , Dara Dastan , Parviz Heidari","doi":"10.1016/j.kjs.2025.100407","DOIUrl":"10.1016/j.kjs.2025.100407","url":null,"abstract":"<div><div>Cinnamate 4-hydroxylase (C4H) is a key enzyme in the phenylpropanoid pathway, catalyzing the hydroxylation of trans-cinnamic acid to p-coumaric acid. However, there is very limited information on the function of C4H in medicinal plants. In the present study, the C4H gene from the <em>Ferula pseudalliacea</em> genome (named FpC4H) was cloned and characterized. Besides, the expression levels of <em>FpC4H</em> in the roots, stems, leaves, flowers, and immature fruits were investigated via real-time PCR (polymerase chain reaction). FpC4H showed the most similarity with C4H proteins from <em>Daucus carota</em>. The results predicted that FpC4H, as well as its orthologs, is an unstable and hydrophilic protein. A high genetic distance was observed between FpC4H and C4H from monocots based on evolutionary analysis. A variable region related to the variable function of C4H was detected in the conserved domain region of C4H proteins. Protein structure analysis revealed that isoleucine and leucine residues are frequently present in the binding region of FpC4H, and two ion binding regions, cysteine258 and asparagine217, were identified in the 3D structure of FpC4H. Expression analysis revealed that the <em>FpC4H</em> gene is expressed in all organs of <em>F. pseudallicea</em>. A low expression level of <em>FpC4H</em> was recorded in leaves, and a high expression level was observed in flower. Based on the expression profile, FpC4H seems to be linked to a high content of phenolic compounds in flowers. In future studies related to metabolic engineering, <em>FpC4H</em> with a promoter linked to specific tissues (flowers and roots) could be investigated for improving the content of the phenolic compounds.</div></div>","PeriodicalId":17848,"journal":{"name":"Kuwait Journal of Science","volume":"52 3","pages":"Article 100407"},"PeriodicalIF":1.2,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143724931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improving kernel ridge regression for medical data classification based on meta-heuristic algorithms 基于元启发式算法的医学数据分类改进核脊回归

IF 1.2 4区综合性期刊

Kuwait Journal of Science Pub Date : 2025-03-19 DOI: 10.1016/j.kjs.2025.100408

Shaimaa Waleed Mahmood , Ghalya Tawfeeq Basheer , Zakariya Yahya Algamal

{"title":"Improving kernel ridge regression for medical data classification based on meta-heuristic algorithms","authors":"Shaimaa Waleed Mahmood , Ghalya Tawfeeq Basheer , Zakariya Yahya Algamal","doi":"10.1016/j.kjs.2025.100408","DOIUrl":"10.1016/j.kjs.2025.100408","url":null,"abstract":"<div><div>Kernel ridge regression (KRR) is a type of machine learning approach that integrates ridge regression with the kernel trick. However, the performance of KRR is sensitive to the values of the hyperparameters that characterize the kernel type. There is a large processing cost, memory expense, and low accuracy performance associated with the existing methods for obtaining these hyperparameter values. The development of meta-heuristic algorithms has helped in solving difficult issues. In this paper, the main improvement is included in the pelican optimization algorithm by applying elite opposite-based learning (EOBL) to improve population diversity in the search space for selecting the best hyperparameters. To confirm and validate the performance of the proposed improvement of KRR, 10 publicly available medical datasets were applied. Depending on several assessment criteria, the results demonstrated that the proposed improvement outperforms all baseline methods in terms of classification performance. The proposed approach has provided more than 92 % of overall accuracy in seven datasets. Of the three datasets, it achieved an overall result of 79 % in producing the highest classification accuracy.</div></div>","PeriodicalId":17848,"journal":{"name":"Kuwait Journal of Science","volume":"52 3","pages":"Article 100408"},"PeriodicalIF":1.2,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143724930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microplastics' occurrence, distribution, and chemical toxicity in backwater sediments from Puducherry Coast, Southeast India 印度东南部普杜切里海岸回水沉积物中微塑料的发生、分布和化学毒性

IF 1.2 4区综合性期刊

Kuwait Journal of Science Pub Date : 2025-03-17 DOI: 10.1016/j.kjs.2025.100406

Supriya Varshini Datchanamourthy, Shailajha Natarajan, Srinivasamoorthy Krishnaraj, Vinnarasi Francis, Babu Chinnaiyan, Ponnumani Govindhan, Ramesh Kamalapathy, Gopalakrishnan Viswalingam

{"title":"Microplastics' occurrence, distribution, and chemical toxicity in backwater sediments from Puducherry Coast, Southeast India","authors":"Supriya Varshini Datchanamourthy, Shailajha Natarajan, Srinivasamoorthy Krishnaraj, Vinnarasi Francis, Babu Chinnaiyan, Ponnumani Govindhan, Ramesh Kamalapathy, Gopalakrishnan Viswalingam","doi":"10.1016/j.kjs.2025.100406","DOIUrl":"10.1016/j.kjs.2025.100406","url":null,"abstract":"<div><div>Microplastics (MPs) are degraded particles (≤5.0 mm) that originate from macro-sized plastics that significantly impact ecosystems due to their extensive fragmentation. These lighter particles, impacted by various environmental factors, become negatively buoyant and sink into sediments. In the current study, the vertical distribution of MPs from three distinct locations along the Puducherry coastal region, Ariyankuppam River Bridge (S1), Thengaithittu Fishing Harbor (S2), and Chunnambar Beach (S3), was investigated. The three sediment core samples ranging from 0 to 10 cm depth were bifurcated into five sub-samples of 2 cm intervals. The MPs exhibited a gradually decreasing abundance with increasing depth. Higher MPs were observed within the top 0–2 cm sediment samples. The average MP concentration in S<sub>1</sub>, S<sub>2</sub>, and S<sub>3</sub> sediments was 138.5 MP cm<sup>−2</sup>, 107.5 MP cm<sup>−2</sup>, and 118.0 MP cm<sup>−2</sup>, respectively. The most dominant MPs identified in sediments were fibers, fragments, and film with the major composition of polyethylene (PE), polypropylene (PP), and polyethylene terephthalate (PET). The MPs exhibited morphological changes, including irregular cracks, micro-brittles, pores, and erosion-like amorphous characteristics, potentially threatening marine organisms. Samples from S1 had a high pollution risk index (1,25,230) and polymeric hazards. All the sampling sites recorded a high contamination factor (CF ≥ 6) of sediments due to high levels of MPs. The present study emphasizes the need for deeper sediment sampling to gain valuable insights into MPs within global budgets.</div></div>","PeriodicalId":17848,"journal":{"name":"Kuwait Journal of Science","volume":"52 3","pages":"Article 100406"},"PeriodicalIF":1.2,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143686319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0