Kuwait Journal of Science最新文献

{"title":"Numerical range of tensor product of operators in semi-Hilbert spaces","authors":"Najla Altwaijry ,&nbsp;Christophe Chesneau ,&nbsp;Kais Feki ,&nbsp;Zakaria Taki","doi":"10.1016/j.kjs.2025.100370","DOIUrl":"10.1016/j.kjs.2025.100370","url":null,"abstract":"<div><div>Let <span><math><mi>A</mi></math></span> and <span><math><mi>B</mi></math></span> be two positive bounded linear operators acting on the complex Hilbert spaces <span><math><mi>H</mi></math></span> and <span><math><mi>K</mi></math></span>, respectively. In this paper, we study the <span><math><mrow><mo>(</mo><mi>A</mi><mo>⊗</mo><mi>B</mi><mo>)</mo></mrow></math></span>-numerical range <span><math><mrow><msub><mrow><mi>W</mi></mrow><mrow><mi>A</mi><mo>⊗</mo><mi>B</mi></mrow></msub><mrow><mo>(</mo><mi>T</mi><mo>⊗</mo><mi>S</mi><mo>)</mo></mrow></mrow></math></span> of the tensor product <span><math><mrow><mi>T</mi><mo>⊗</mo><mi>S</mi></mrow></math></span> for two bounded linear operators <span><math><mi>T</mi></math></span> and <span><math><mi>S</mi></math></span> on <span><math><mi>H</mi></math></span> and <span><math><mi>K</mi></math></span>, respectively. In the context of this work, we demonstrate that if either <span><math><mi>T</mi></math></span> is <span><math><mi>A</mi></math></span>-hyponormal or <span><math><mi>S</mi></math></span> is <span><math><mi>B</mi></math></span>-hyponormal, then <span><span><span><math><mrow><mover><mrow><msub><mrow><mi>W</mi></mrow><mrow><mi>A</mi><mo>⊗</mo><mi>B</mi></mrow></msub><mrow><mo>(</mo><mi>T</mi><mo>⊗</mo><mi>S</mi><mo>)</mo></mrow></mrow><mo>¯</mo></mover><mo>=</mo><mi>co</mi><mfenced><mrow><mover><mrow><msub><mrow><mi>W</mi></mrow><mrow><mi>A</mi></mrow></msub><mrow><mo>(</mo><mi>T</mi><mo>)</mo></mrow></mrow><mo>¯</mo></mover><mi>⋅</mi><mover><mrow><msub><mrow><mi>W</mi></mrow><mrow><mi>B</mi></mrow></msub><mrow><mo>(</mo><mi>S</mi><mo>)</mo></mrow></mrow><mo>¯</mo></mover></mrow></mfenced><mo>,</mo></mrow></math></span></span></span>where <span><math><mrow><msub><mrow><mi>W</mi></mrow><mrow><mi>A</mi></mrow></msub><mrow><mo>(</mo><mi>T</mi><mo>)</mo></mrow></mrow></math></span> and <span><math><mrow><msub><mrow><mi>W</mi></mrow><mrow><mi>B</mi></mrow></msub><mrow><mo>(</mo><mi>S</mi><mo>)</mo></mrow></mrow></math></span> denote the <span><math><mi>A</mi></math></span>-numerical range of <span><math><mi>T</mi></math></span> and the <span><math><mi>B</mi></math></span>-numerical range of <span><math><mi>S</mi></math></span>, respectively. Here, <span><math><mrow><mi>co</mi><mrow><mo>(</mo><mi>⋅</mi><mo>)</mo></mrow></mrow></math></span> and the over-line denote the convex hull and the closure, respectively. Moreover, we provide some <span><math><mrow><mo>(</mo><mi>A</mi><mo>⊗</mo><mi>B</mi><mo>)</mo></mrow></math></span>-numerical radius inequalities.</div></div>","PeriodicalId":17848,"journal":{"name":"Kuwait Journal of Science","volume":"52 2","pages":"Article 100370"},"PeriodicalIF":1.2,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143165747","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}

{"title":"Historical rainfall reconstruction in the period of 1900–2010 for extreme climate event analysis (case study in Java Island, Indonesia)","authors":"Trinah Wati ,&nbsp;Tri Wahyu Hadi ,&nbsp;Ardhasena Sopaheluwakan ,&nbsp;Faiz Rohman Fajary ,&nbsp;Lambok M. Hutasoit","doi":"10.1016/j.kjs.2025.100377","DOIUrl":"10.1016/j.kjs.2025.100377","url":null,"abstract":"<div><div>Extreme weather events and climate anomalies are increasing in both frequency and intensity due to climate change, posing greater risks to both human and natural systems. Analyzing hazards like hydrometeorological events is therefore crucial for managing these risks, particularly by utilizing long-term precipitation data spanning up to 100 years. This study aims to develop a method for reconstructing historical rainfall data for the 1900–2010 period in Indonesia, using the European Centre for Medium-Range Weather Forecasts (ECMWF) ERA-20C dataset. The primary methodology involves the retrospective use of the constructed analogues statistical downscaling (CA-SD) method. This approach employs ERA-20C's zonal (U) and meridional (V) wind parameters at 850 hPa, which are converted into scalar field variables as predictors for rainfall reconstruction. The results show that the reconstructed climatological mean is overestimated compared to Multi-Source Weighted-Ensemble Precipitation (MSWEP) data but underestimated compared to station observations. A more comprehensive evaluation, using several deterministic and probabilistic metrics at various rainfall thresholds, was conducted. The ensemble mean correlations improved with temporal aggregation. According to probabilistic metrics, the reliability of estimated 5 mm and 20 mm rainfall events was better than that of rain days (&gt;0.5 mm), while the reliability for 50 mm and 100 mm events was lower. This study produced reconstructed rainfall data for the 1900–2010 period, which could be valuable for climatological and hydrological research. Specifically, the severe drought in Java between 1960 and 1970 can be examined in greater detail; this is important due to its potential reoccurrence in the future.</div></div>","PeriodicalId":17848,"journal":{"name":"Kuwait Journal of Science","volume":"52 2","pages":"Article 100377"},"PeriodicalIF":1.2,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143166800","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}

{"title":"Hydrazones derivatives from halo-pyridinol: Synthesis and DFT-based theoretical exploration","authors":"Mohammed A. Assiri ,&nbsp;Muhammad Suleman ,&nbsp;Muhammad Ibrahim ,&nbsp;Tanveer Hussain Bokhari ,&nbsp;Ajaz Hussain ,&nbsp;Aijaz Rasool Chaudhry ,&nbsp;Iqra Mehwish ,&nbsp;Rabia Nawaz ,&nbsp;Perveen Kanwal ,&nbsp;Faiz Rasool","doi":"10.1016/j.kjs.2025.100375","DOIUrl":"10.1016/j.kjs.2025.100375","url":null,"abstract":"<div><div>Three novel halo-pyridinol-based hydrazone derivatives were synthesized successfully for their virtual optoelectronic properties. These are (<em>E</em>)-2-((2-chloropyridin-3-yl)oxy)-N'-(4-fluorobenzylidene)acetohydrazide (<strong>CPFH</strong>), (<em>E</em>)-N'-(4-chlorobenzylidene)-2-((2-chloropyridin-3-yl)oxy)acetohydrazide (<strong>CCPH</strong>), and (<em>E</em>)-2-((2-chloropyridin-3-yl)oxy)-N'-(4-methylbenzylidene)acetohydrazide (<strong>CPMH</strong>). All these compounds have been extensively characterized using nuclear magnetic resonance and infrared spectroscopic techniques. Additionally, their optoelectronic behavior was investigated using quantum chemical calculations with the ꞷB97XD/6–31+g(d,p) approach. Various properties of the synthesized compounds were explored using density functional theory (DFT) calculations, including NBO (natural bond orbital), NLO (non-linear optical properties), NPA (natural population analysis), and FMO (frontier molecular orbital) analyses. Furthermore, photophysical properties of these compounds were studied using a time-dependent DFT (TD-DFT) approach at the ꞷB97xd/6–31+g(d,p) level. The DFT investigations showed that compound <strong>CPMH</strong> possesses higher stabilization energy than <strong>CCPH</strong> and <strong>CPFH</strong>.</div></div>","PeriodicalId":17848,"journal":{"name":"Kuwait Journal of Science","volume":"52 2","pages":"Article 100375"},"PeriodicalIF":1.2,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143166744","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}

{"title":"A prognostic model of side friction of rock bolt anchoring section based on associated flow law","authors":"Bin Zheng ,&nbsp;Mahmoud Bayat ,&nbsp;Yehui Shi ,&nbsp;Maosen Cao ,&nbsp;Yazhou Jiang ,&nbsp;Xiangdong Qian ,&nbsp;Dragoslav Sumarac","doi":"10.1016/j.kjs.2025.100374","DOIUrl":"10.1016/j.kjs.2025.100374","url":null,"abstract":"<div><div>The distribution of side friction in the elastic stage can be obtained according to the Mindlin solution and its related derivative methods. Nevertheless, owing to the limitations of these methods, they cannot predict side friction in the plastic stage. In order to accurately and reliably characterize the distribution of frictional stress along the anchorage section of the interface plastic deformation side, at present, side friction in the plastic stage is mainly predicted by establishing a nonlinear bond-slip model. However, the physical meaning of some parameters in the existing bond-slip model is ambiguous, and these parameters need to be obtained by fitting measured data from the pull-out test, which cannot be solved directly according to actual working conditions. Since the expansion of soil around the anchor in the plastic stage meets the associated flow law, a new prediction model of side friction distribution in the plastic stage is established in this paper based on the rule. Compared with the measured data of several groups of tests and prediction results of the Mindlin solution, it is found that the model proposed shows good accuracy and stability in predicting side friction in the plastic stage.</div></div>","PeriodicalId":17848,"journal":{"name":"Kuwait Journal of Science","volume":"52 2","pages":"Article 100374"},"PeriodicalIF":1.2,"publicationDate":"2025-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143166750","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}

{"title":"A Bayesian inference with Hamiltonian Monte Carlo (HMC) framework for a three-parameter model with reliability applications","authors":"Mustapha Muhammad ,&nbsp;Badamasi Abba","doi":"10.1016/j.kjs.2025.100365","DOIUrl":"10.1016/j.kjs.2025.100365","url":null,"abstract":"<div><div>In this work, a complete Bayesian paradigm for the proposed three-parameter Weibull-based model is presented, and the Hamiltonian Monte Carlo (HMC) algorithm was used to enhance precision and expedite inference. Simulation studies were used to evaluate the appropriateness of the proposed Bayes estimators. In addition, maximum likelihood estimators (MLEs) are also presented. We demonstrate that the MLEs for each parameter exist under certain conditions, with some being uniquely identifiable. Moreover, comprehensive reliability characteristics of the proposed model were derived and studied, such as the reliability function, failure rate function, mean residual life, and <span><math><mi>r</mi></math></span>th moments. We also investigated the identifiability of the proposed model’s parameters. Finally, two real datasets involving the failure times of some components were used to evaluate the performance of the proposed estimation methods and the model. The proposed model outperformed many existing models, ranking first in both dataset evaluations by consistently achieving more of the lowest values in the Akaike information criterion (AIC), Bayesian information criterion, corrected AIC, Kolmogorov–Smirnov test, Anderson–Darling test, and Cramér–von Mises test.</div></div>","PeriodicalId":17848,"journal":{"name":"Kuwait Journal of Science","volume":"52 2","pages":"Article 100365"},"PeriodicalIF":1.2,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143166738","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}

{"title":"Clarify the relationship between the land surface temperature and clay minerals using Landsat temporal data, spectral, and XRD data: A case study from some clay quarries southwest Al-Alamin City, Egypt","authors":"Mohamed A. Agha ,&nbsp;Ahmed A. Masoud ,&nbsp;Ahmed A. Madani ,&nbsp;Sayed M. Abdel Aziz","doi":"10.1016/j.kjs.2025.100371","DOIUrl":"10.1016/j.kjs.2025.100371","url":null,"abstract":"<div><div>Clay minerals hold significant economic value due to their extensive industrial applications. This study aims to utilize land surface temperature (LST) data to distinguish and map clay quarries in southwest Al-Alamin City, Egypt, and understand the spectral characteristics of clay minerals using laboratory visible near-infrared (VNIR) spectral data. LST values are retrieved from the thermal infrared bands of Landsat series 5 and 8 data, acquired in August of 1985, 2010, and 2020. The spatial distribution of these values is mapped. The results reveal that LST values increased over time, reaching 37 °C in 1985, 43 °C in 2010, and 44 °C in 2020, primarily due to the exposure and quarrying of clay. Three clay minerals, montmorillonite, kaolinite, and illite, are identified through x-ray diffraction (XRD) analyses. A broad absorption feature near 0.9 μm is recorded in the clay spectral profiles, attributed to the presence of iron, as indicated by x-ray fluorescence (XRF) data. For principal component analysis (PCA) mapping, a combination of PC1, PC2, and PC4 was used for the Deir El-Morair Quarry, while PC1, PC4, and PC5 were employed for the Deir Abuel-Hagif Quarry. The clay spectral profiles showed that band ratio (7/6) effectively discriminates clay from other rocks, while band ratios (5/6 and 5/7) differentiate between iron silicates and clay minerals. The present study successfully identified and mapped the clay quarries using LST, spectra, and XRF data, and the approach can be applied to identify possible clay areas anywhere.</div></div>","PeriodicalId":17848,"journal":{"name":"Kuwait Journal of Science","volume":"52 2","pages":"Article 100371"},"PeriodicalIF":1.2,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143166797","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}

{"title":"Genome wide association analysis for body measurements in Jabal Akhdar Omani goats","authors":"Mohammed Al-Abri ,&nbsp;Kathiya Al Kharousi ,&nbsp;Abeer Al Hamrashdi ,&nbsp;Al Ghalya Al Toobi ,&nbsp;Hussain Bahbahani ,&nbsp;Mohamed M.I. Salem","doi":"10.1016/j.kjs.2025.100372","DOIUrl":"10.1016/j.kjs.2025.100372","url":null,"abstract":"<div><div>The Jabal Akhdar goat, which represents 5% of the Omani goat population, inhabits the high-altitude regions of the Jabal Akhdar mountain range. This breed is renowned for its rapid growth, high twinning rate, and adaptability to extreme environmental conditions, including harsh temperatures. To investigate the genetic basis underlying its phenotypic traits, a genome-wide association study was conducted using SNP genotypes from 72 Jabal Akhdar female goats, obtained through the Illumina GoatSNP50 BeadChip. The study aimed to identify genetic associations with 14 distinct body size measurements: bicoastal diameter, rump width, cannon bone circumference, muzzle diameter, head girth, sternum height, rump height, head width, body depth, withers height, ear length, rump length, head length, and body length. From a total of 46,035 pruned SNPs, 51 were found to be significantly associated with various body measurements, excluding withers height, body length, head girth, and cannon bone circumference. A total of 90 candidate genes were identified within a 100 kb region of the significant SNPs, playing key roles in biological processes such as cell growth, early embryonic development, and muscle development. Some of these genes were involved in cell growth (<em>ISM1</em>), early brain development (<em>ADK</em>), and muscle development (<em>ATP2A1</em>). The findings of this study provide valuable insights for further research aimed at identifying causative variants and haplotypes linked to desirable traits in Jabal Akhdar goats. These discoveries could inform the development of genetically-driven breeding programs to conserve this indigenous breed and enhance its productivity.</div></div>","PeriodicalId":17848,"journal":{"name":"Kuwait Journal of Science","volume":"52 2","pages":"Article 100372"},"PeriodicalIF":1.2,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143166802","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}

{"title":"Water pollution remediation: Synthesis, characterization and adsorption studies of poly(o-anisidine)/MWCNTs nanocomposite for the elimination of direct yellow 26 dye","authors":"Mirza Nadeem Ahmad ,&nbsp;Muhammad Naveed Anjum ,&nbsp;Akbar Ali ,&nbsp;Rabeya Ijaz ,&nbsp;Sarosh Iqbal ,&nbsp;Rashad Al-Salahi ,&nbsp;Hatem A. Abuelizz ,&nbsp;Cedric Delattre","doi":"10.1016/j.kjs.2025.100368","DOIUrl":"10.1016/j.kjs.2025.100368","url":null,"abstract":"<div><div>The synthesis of poly(<em>o</em>-anisidine)/multi-walled carbon nanotubes composite (POA/MWCNTs NC) was carried out via chemical oxidative polymerization for the adsorptive removal of Direct Yellow 26 dye (DY 26). In the polymerization, the ammonium persulphate was used as an oxidant along with 4,4′-diaminodiphenylamine dimer as initiator. Then, the structural composition, crystalline properties, absorption behavior, morphology, and surface attributes of both the polymer and the nanocomposite were analyzed by different techniques such as Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), UV–visible spectroscopy (UV–visible), scanning electron microscopy (SEM) and Brunauer-Emmett-Teller analysis (BET). BET analysis showed significant improvement in the surface area (690 m²/g) and porosity (0.216 cm³/g) of the composite material as compared to pure POA. Further, the composite was applied for the elimination of DY 26 in aqueous media. Moreover, the adsorption parameters were also optimized like pH, contact time, adsorbent dose and dye concentration. The highest dye removal efficiency was achieved up to 83% against 50 mg/L concentration of dye solution under the conditions of pH at 2, contact time of 30 min, and 2 g amount of the adsorbent. Furthermore, the kinetic studies revealed that the adsorption of DY 26 followed the pseudo first-order rate constant by the polymeric adsorbent.</div></div>","PeriodicalId":17848,"journal":{"name":"Kuwait Journal of Science","volume":"52 2","pages":"Article 100368"},"PeriodicalIF":1.2,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143166740","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}

{"title":"Biogenic synthesis and characterization of MgO/CuO nanohybrids for degradation of acid blue 113 dye: A sustainable environmental remedial approach","authors":"Shumaila Kiran ,&nbsp;Ali S. Alkorbi ,&nbsp;Muhammad Ashraf ,&nbsp;Sadia Javed ,&nbsp;Nazish Jahan ,&nbsp;Raziya Nadeem ,&nbsp;M. Bilal Qadir ,&nbsp;Zubair Khaliq ,&nbsp;M. Jalalah ,&nbsp;Farid A. Harraz","doi":"10.1016/j.kjs.2025.100369","DOIUrl":"10.1016/j.kjs.2025.100369","url":null,"abstract":"<div><div>This work focused on the green synthesis of MgO and CuO nanoparticles using the ripened fruit extract of <em>Prunus armeniaca</em> (apricot) using a green, economical, eco-friendly method. The fruit extract acts as a reducing and capping agent and does not require external reducing and stabilizing agents. The formation of nanoparticles was checked by UV–Visible spectrophotometer. Different techniques including UV–Visible, X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), nanoparticle tracking analysis (NTA), and zeta potential were used to characterize the green-synthesized nanoparticles. The nano-scaled MgO and CuO particles were used to decolorize Acid Blue 113 (AB113). Dye removal efficiency of MgO/CuO nanohybrid was determined by optimizing the reaction variables including dye level, nanoparticle mass, temperature, and pH. The maximum dye removal was observed at 10 mg/L dye level, 3:6 mg/L MgO/CuO nanohybrid (0.003/0.006 g/L), at 50 °C and 7 pH. The adsorptive and catalytic behavior of CuO/MgO nanohybrid showed promising results in the removal of the target dye. The kinetic study showed second order kinetics of the reaction. These hybrid nanoparticles could be employed to treat other harmful synthetic dyes to control water pollution.</div></div>","PeriodicalId":17848,"journal":{"name":"Kuwait Journal of Science","volume":"52 2","pages":"Article 100369"},"PeriodicalIF":1.2,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143166746","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}

{"title":"Sequencing KRT71 as a candidate gene for hair shape variation in dromedary camels","authors":"Kawther M. Akbar,&nbsp;Bader H. Alhajeri,&nbsp;Hasan Alhaddad","doi":"10.1016/j.kjs.2025.100364","DOIUrl":"10.1016/j.kjs.2025.100364","url":null,"abstract":"<div><div>Mammalian breeds within different species display a distinct variation in hair shape. Genetic variants within the <em>Keratin 71</em> (<em>KRT71</em>) gene were linked to curly hair in multiple species, making it a suitable candidate for investigating hair shape in under-studied species like the dromedary camel. Hair shape has been recently characterized in dromedary camels and classified into five categories: straight, C-shaped, wavy, ringed, and kinky. The objective of this study was to (1) sequence the coding regions of <em>KRT71</em> gene (i.e., exons and intronic splicing regions) using a group of dromedary camels of different hair shapes, (2) identify polymorphisms, and (3) examine the relationship between the identified polymorphisms and hair shape. Tail-hair samples were collected from 102 different Arabian Peninsula camel-types and their DNA was extracted. For each individual camel, the coding and intronic splice regions of the <em>KRT71</em> gene were amplified using multiple PCR reactions and the PCR products were then Sanger sequenced. The alignment of the generated sequences across the sampled 102 camels revealed a total of seventeen polymorphisms, five of which were in the coding region. Although some of these polymorphisms caused amino acid alterations, none of them fully explained the different hair shape categories in the dromedary camel. However, the identified variants may work and interact with variants in other genes to control hair shape. This study is the first to investigate hair shape genetics in dromedary camels, providing the basis for future selective breeding programs.</div></div>","PeriodicalId":17848,"journal":{"name":"Kuwait Journal of Science","volume":"52 2","pages":"Article 100364"},"PeriodicalIF":1.2,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143166803","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}