Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Physical Sciences and Mathematics (7711)
- Life Sciences (5832)
- Medicine and Health Sciences (4677)
- Medical Sciences (3344)
- Computer Engineering (2852)
-
- Computer Sciences (2852)
- Electrical and Computer Engineering (2852)
- Engineering (2852)
- Animal Sciences (2531)
- Mathematics (1969)
- Chemistry (1528)
- Veterinary Medicine (1333)
- Agriculture (1249)
- Forest Sciences (1249)
- Zoology (1198)
- Botany (1048)
- Plant Sciences (1048)
- Biology (1004)
- Earth Sciences (763)
- Physics (599)
- Keyword
-
- Turkey (586)
- Taxonomy (199)
- COVID-19 (155)
- Oxidative stress (136)
- New species (125)
-
- New records (105)
- Apoptosis (96)
- Morphology (88)
- Inflammation (86)
- Children (85)
- Classification (85)
- Deep learning (85)
- Iran (85)
- Antioxidant (81)
- Machine learning (80)
- Breast cancer (79)
- New record (78)
- Phylogeny (75)
- Biodiversity (72)
- Rat (71)
- Optimization (68)
- Genetic diversity (66)
- Distribution (64)
- Mortality (64)
- Cytotoxicity (63)
- Fauna (60)
- Genetic algorithm (60)
- Cancer (58)
- Gene expression (58)
- SARS-CoV-2 (55)
- Publication Year
Articles 361 - 390 of 18792
Full-Text Articles in Entire DC Network
Adaptive Two-Derivative Runge–Kutta–Nyström Method With Trigonometric Fitting Approach, Nur Nabila Huda, Khai Chien Lee, Nurul Huda Abdul Aziz
Adaptive Two-Derivative Runge–Kutta–Nyström Method With Trigonometric Fitting Approach, Nur Nabila Huda, Khai Chien Lee, Nurul Huda Abdul Aziz
Turkish Journal of Mathematics
A fifth-order trigonometrically-fitted explicit two-derivative Runge–Kutta–Nyström method with an adaptive step size strategy, denoted as ATFRKN5, is proposed for efficiently solving second-order ordinary differential equations of the form u″(x) = f(x, u(x)) that exhibit oscillatory behavior. The order conditions of the method are derived using Taylor series expansion, enabling the construction of two-derivative Runge–Kutta–Nyström schemes up to orders four and five. Trigonometric fitting is applied by incorporating the basis functions eiλx and e−iλx, λ ∈ ℝ, allowing the method to adapt naturally to problems with dominant frequencies. …
On Sequences Arising From The Action Of Modular Group, Tuncay Köroğlu, Bahadir Özgür Güler
On Sequences Arising From The Action Of Modular Group, Tuncay Köroğlu, Bahadir Özgür Güler
Turkish Journal of Mathematics
This paper examines the sequences produced by the natural action of specific elements of the modular group on extended rational numbers. The polynomial sequences Pr(c) and Qr(c) are derived from the orbit of the point at infinity under a specific modular transformation. These sequences satisfy linear recurrence relations, which are analyzed using generating functions. The polynomials encode k-Fibonacci numbers, and studying their behavior modulo a fixed integer m reveals notable arithmetic and combinatorial properties. We also explore the connection between these modular actions and Farey graphs, illustrating the hyperbolic transformations as nested geodesic paths in the upper half-plane.
A Module Theoretic Approach To (B,C)-Invertibility, Tuğba Pakel, Burcu Üngör, Handan Köse, Sai̇t Halicioğlu, Abdullah Harmanci
A Module Theoretic Approach To (B,C)-Invertibility, Tuğba Pakel, Burcu Üngör, Handan Köse, Sai̇t Halicioğlu, Abdullah Harmanci
Turkish Journal of Mathematics
In this paper, we introduce and investigate the concept of an (r, f)-inverse in the context of modules, drawing inspiration from the (b, c)-inverse, which is the analogous notion in ring theory. We demonstrate the uniqueness of (r, f)-inverses in modules whenever they exist. We provide some necessary and sufficient conditions for the existence of (r, f)-inverses in modules.
Existence Results And Uniqueness For Some Caputo-Hadamard Fractional Differential Equations Via The Measures Of Noncompactness, Manochehr Kazemi, Mohammad Esmael Samei, Hamid Reza Sahebi, Osman Tunç
Existence Results And Uniqueness For Some Caputo-Hadamard Fractional Differential Equations Via The Measures Of Noncompactness, Manochehr Kazemi, Mohammad Esmael Samei, Hamid Reza Sahebi, Osman Tunç
Turkish Journal of Mathematics
In this paper, the existence of solutions to Caputo–Hadamard fractional differential equations is investigated using measures of noncompactness and the Petryshyn fixed point theorem. Several new results are established, recovering certain earlier results under weaker conditions. Finally, two illustrative examples are presented.
Proportion Of Nilpotent Subgroups In Finite Groups And Their Properties, João Victor Monteiros De Andrade, Leonardo Santos Da Cruz
Proportion Of Nilpotent Subgroups In Finite Groups And Their Properties, João Victor Monteiros De Andrade, Leonardo Santos Da Cruz
Turkish Journal of Mathematics
This work introduces and investigates the function J(G) = Nil(G) / L(G) , where Nil(G) denotes the number of nilpotent subgroups and L(G) the total number of subgroups of a finite group G. The function J(G), defined on the interval (0,1], represents the proportion of nilpotent subgroups relative to the total number of subgroups, including trivial ones. It serves as a tool for analyzing structural patterns in finite groups, particularly in nonnilpotent families such as supersolvable and dihedral groups. Analytical results reveal the distribution of J(G) values across products of dihedral groups, emphasizing its density over (0,1]. Additionally, a probabilistic …
Optimal Control Of An Inverse Two-Point Boundary Value Problem For A Pseudoparabolic Equation With Samarskii–Ionkin-Type Boundary Conditions, Khanlar R. Mamedov, Tursun K. Yuldashev, Zholdoshbek Zh. Shermamatov
Optimal Control Of An Inverse Two-Point Boundary Value Problem For A Pseudoparabolic Equation With Samarskii–Ionkin-Type Boundary Conditions, Khanlar R. Mamedov, Tursun K. Yuldashev, Zholdoshbek Zh. Shermamatov
Turkish Journal of Mathematics
This paper investigates an inverse optimal control problem for a pseudoparabolic equation governed by nonlinear control function in a two-point boundary condition. The differential equation is considered under Samarskii Ionkin-type boundary value conditions with respect to the spatial variable x. Necessary optimality conditions are derived, and the associated nonlinear functional equations are analyzed. Using the contraction mapping principle, the existence and uniqueness of the control function are established. Subsequently, the redefinition function and the state function are determined. The convergence of their respective Fourier series representations is rigorously proven.
Close-To-Convexity Properties Of Inverse Hypergeometric Functions, Ijlal Hussain, Wasim Ul Haq, Janusz Sokol
Close-To-Convexity Properties Of Inverse Hypergeometric Functions, Ijlal Hussain, Wasim Ul Haq, Janusz Sokol
Turkish Journal of Mathematics
The normalized inverse hypergeometric function zFν−1(d, e, f; z) = ∑s=0∞ Aszs+1 is considered, where As = (f)s(ν + 1)s / (d)s(e)s. We aim to provide constraints on d, e, f, and ν under which zFν−1(d, e, f; z) belongs to various subclasses of the class of close-to-convex functions. Coefficient characterizations of these families are derived under additional conditions. Some associated operators …
Ricci Solitons On Manifolds With Norden Golden Structure, Bang-Yen Chen, Foued Aloui, Mohammed Nisar, Majid Ali Choudhary
Ricci Solitons On Manifolds With Norden Golden Structure, Bang-Yen Chen, Foued Aloui, Mohammed Nisar, Majid Ali Choudhary
Turkish Journal of Mathematics
The concept of golden structure is a compelling area with wide-ranging applications. In this paper, we introduce and investigate the notion of Norden golden Ricci solitons. In particular, we investigate Ricci solitons on a Norden golden Riemannian manifold of constant sectional curvature. Furthermore, we explore Ricci solitons and Norden golden Ricci solitons on Norden golden Riemannian manifolds whose potential vector fields are killing, conformal killing, concurrent, or homothetic.
Comparisons Of Some Weighted Mixed Biased Estimators For The Linear Regression Model, Dünya Karapinar, Murat Polat, Ni̇met Özbay, Selahatti̇n Kaçiranlar
Comparisons Of Some Weighted Mixed Biased Estimators For The Linear Regression Model, Dünya Karapinar, Murat Polat, Ni̇met Özbay, Selahatti̇n Kaçiranlar
Turkish Journal of Mathematics
This paper presents comparative results on the two-parameter weighted mixed estimator, which is a distinct class of estimator defined to address the problem of multicollinearity. The two-parameter weighted mixed estimator is a general estimator that includes the weighted mixed estimator, the weighted mixed Liu estimator, and the weighted mixed ridge estimator. Detailed comparisons among the mentioned estimators are carried out based on the matrix mean square error. Theoretical findings are supported by two numerical examples in addition to a Monte Carlo simulation study.
Improved Oscillation Criteria For A Class Of Neutral Differential Equations In The Canonical Case, Abdulaziz Khalid Alsharidi, Ali Muhib
Improved Oscillation Criteria For A Class Of Neutral Differential Equations In The Canonical Case, Abdulaziz Khalid Alsharidi, Ali Muhib
Turkish Journal of Mathematics
This paper develops an analytical framework based on comparison with first-order equations to derive new oscillation criteria for all solutions of a class of second-order differential equations with multiple delays. These criteria extend and improve upon previously published results. Illustrative examples are provided to validate the theoretical findings and to demonstrate the significance and applicability of the proposed criteria.
Oscillation Properties Of First-Order Difference Equations With Nonmonotone Delays: New Insights And Criteria, Emad Attia, George Chatzarakis
Oscillation Properties Of First-Order Difference Equations With Nonmonotone Delays: New Insights And Criteria, Emad Attia, George Chatzarakis
Turkish Journal of Mathematics
In this paper, we examine the oscillatory behavior of the first-order linear delay difference equation Δy(n) + p(n) y(τ(n)) = 0, n ∈ ℕ0. It is known in the literature that, for any C > 0, the condition lim supn→∞ ∑i=τ(n)n p(i) > C, with τ(n) nonmonotone, is not, in general, sufficient to establish the oscillation of the difference equation. We prove that, for certain classes of difference equations, the aforementioned condition is sufficient to ensure the …
On The Number Of Exact Factorization Of Finite Groups, Jesus Alonso Ochoa Arango, Maria Angelica Umbarila Martin
On The Number Of Exact Factorization Of Finite Groups, Jesus Alonso Ochoa Arango, Maria Angelica Umbarila Martin
Turkish Journal of Mathematics
In this work, the function f2(G), which counts the number of exact factorizations of a finite group G, is studied. The value of f2(G) is computed for several well-known families of finite groups, and an asymptotic expression is derived for the number of exact factorizations of the alternating group A2n .
Nitrogen Limitation Adaptation (Nla) Modulates Phosphorus And Iron Homeostasis During Boron Toxicity In Arabidopsis Thaliana, Doğa S. Kayihan, Ümi̇t Bariş Kutman, Emre Aksoy, Ceyhun Kayihan
Nitrogen Limitation Adaptation (Nla) Modulates Phosphorus And Iron Homeostasis During Boron Toxicity In Arabidopsis Thaliana, Doğa S. Kayihan, Ümi̇t Bariş Kutman, Emre Aksoy, Ceyhun Kayihan
Turkish Journal of Botany
Boron (B) toxicity is a major abiotic stress factor that impairs plant growth and disrupts nutrient homeostasis. The Nitrogen Limitation Adaptation (NLA) gene has been implicated in nutrient regulation; however, its role under B toxicity remains unclear. In this study, the physiological, biochemical, and nutrient responses of wild-type (Col-0) and nla mutant Arabidopsis thaliana were investigated under mild (1 mM H3 BO3 ; 1B) and severe (2 mM H3 BO3 ; 2B) B toxicity conditions. Excess B reduced fresh weight and photosynthetic pigment levels in both genotypes; however, nla mutants exhibited lower malondialdehyde accumulation under 1B, indicating a delayed oxidative …
Genetic Variation In Crops Of The Second Millennium Bce Revealed By Ancient Dna Analysis, Asi̇ye Uluğ, Funda Özdemi̇r Deği̇rmenci̇, Çi̇ğdem Kansu, Christina Luke, Christopher H. Roosevelt, Zeki̇ Kaya
Genetic Variation In Crops Of The Second Millennium Bce Revealed By Ancient Dna Analysis, Asi̇ye Uluğ, Funda Özdemi̇r Deği̇rmenci̇, Çi̇ğdem Kansu, Christina Luke, Christopher H. Roosevelt, Zeki̇ Kaya
Turkish Journal of Botany
For millennia, the Anatolian plateau has functioned as a major migratory corridor between Africa, Asia, and Europe and has subsequently been shaped by shifting settlement patterns, ranging from small communities to complex urban and imperial systems. These processes were closely associated with the development and diversification of agricultural practices. Archaeobotanical investigations at Kaymakçı, a Middle and Late Bronze Age (ca. 3500 years BP) site located in the middle Gediz Valley of western Anatolia, have provided substantial evidence of crop cultivation in the region. In this study, genetic variation in barley (Hordeum vulgare L.), chickpea (Cicer arietinum L.), bitter vetch (Vicia …
Improved Nutritional Value Of Spinach (Spinacia Oleracea L.) Through Moderate Salinity-Induced Regulation Of Vitamin C And Folate Pathways, Laleh Ahmadi, Hanieh Mohajjel Shoja, Elham Mohajel Kazemi, Maryam Kolahi
Improved Nutritional Value Of Spinach (Spinacia Oleracea L.) Through Moderate Salinity-Induced Regulation Of Vitamin C And Folate Pathways, Laleh Ahmadi, Hanieh Mohajjel Shoja, Elham Mohajel Kazemi, Maryam Kolahi
Turkish Journal of Botany
Soil salinity is a major abiotic stress affecting over 20% of cultivated and 33% of irrigated lands worldwide, significantly limiting crop productivity and nutrient biosynthesis. Vitamin C and folate are crucial antioxidants in plant stress tolerance and human nutrition; however, their regulation under salt stress remains unclear, particularly in leafy vegetables. This study evaluated the effects of different salinity levels (0, 50, 150, 250, and 350 mM NaCl) on physiological traits, antioxidant activity, vitamin C and folate accumulation, and the expression of related biosynthetic genes in spinach (Spinacia oleracea L.). High salinity (250–350 mM) reduced growth, leaf area, and pigment …
Identification Of Qtls And Molecular Markers Associated With Gray Mold Resistance In Grape, İlknur Polat, İbrahi̇m Çeli̇k, Onur Ergönül, Asli Polat, İlker Kurbetli̇, Görkem Sülü, Ayfer Daldal, Hali̇l İbrahi̇m Uzun
Identification Of Qtls And Molecular Markers Associated With Gray Mold Resistance In Grape, İlknur Polat, İbrahi̇m Çeli̇k, Onur Ergönül, Asli Polat, İlker Kurbetli̇, Görkem Sülü, Ayfer Daldal, Hali̇l İbrahi̇m Uzun
Turkish Journal of Botany
Grape (Vitis vinifera L.) is an economically important fruit that is both consumed fresh from the vine and used in the production of raisins, wine, and vinegar. One of the main factors limiting grape production is gray mold, caused by the fungal pathogen Botrytis cinerea. The cultivation of mold-resistant grape cultivars represents the most effective strategy for disease management; however, molecular tools to aid in the breeding of B. cinerea-resistant grapes remain limited. The present study maps the quantitative trait loci (QTLs) associated with B. cinerea resistance in grape using an F1 population derived from a reciprocal cross between the …
Vanadium’S Journey From Essential Trace Metal To Emerging Environmental Pollutant In The Anthropocene Era, Tanu Arora, Nivedita Agnihotri, Mohammad Azam
Vanadium’S Journey From Essential Trace Metal To Emerging Environmental Pollutant In The Anthropocene Era, Tanu Arora, Nivedita Agnihotri, Mohammad Azam
Turkish Journal of Chemistry
Vanadium, previously considered a minor trace element, is gaining global environmental attention due to its expanding applications in metallurgy, energy storage, catalysis, and agriculture. With this rise in its industrial and technological uses, however, anthropogenic emissions of vanadium into the atmosphere, soils, and water bodies have also escalated. Unlike many heavy metals, vanadium exhibits complex redox behavior, primarily existing as V(IV) and V(V) species, which significantly impacts its environmental mobility, bioavailability, and toxicity. Vanadium exhibits complex behavior that necessitates an integrated research approach to better understand its various roles in scientific fields. This review summarizes the current knowledge on vanadium’s …
Computational And Experimental Analysis Of Oleanolic Acid As An Allosteric Activator Of Sirt1, Emrah Sariyer, Eda Dokumacioğlu, Hati̇ce İskender
Computational And Experimental Analysis Of Oleanolic Acid As An Allosteric Activator Of Sirt1, Emrah Sariyer, Eda Dokumacioğlu, Hati̇ce İskender
Turkish Journal of Chemistry
Sirtuin 1 (SIRT1) is a member of the sirtuin protein family and the biological effects of SIRT1 encompass various areas such as the ageing process, metabolism regulation, and cellular stress response. SIRT1 activators are compounds that enhance the activity of SIRT1 enzyme. These activators can be natural or synthetic compounds and have the potential to provide health benefits by augmenting the biological effects of SIRT1. Oleanolic acid (OA) is a triterpenoid compound that has antiinflammatory, antioxidant, and glucose and lipid metabolism-regulating properties naturally found in many plants. The aim of the present study was to investigate the effect of OA …
Synthesis Of Werner- And Werner-Like-Type Clathrates, Their Characterization, And Theoretical Calculation Of Their Properties, Zari̇fe Si̇bel Şahi̇n, Zeki̇ Kartal
Synthesis Of Werner- And Werner-Like-Type Clathrates, Their Characterization, And Theoretical Calculation Of Their Properties, Zari̇fe Si̇bel Şahi̇n, Zeki̇ Kartal
Turkish Journal of Chemistry
In this paper, the synthesis and structural characterization of three new coordination compounds in crystal structure consisting of a nickel atom, varying numbers of 3-aminopyridine molecules, and two isothiocyanate ion ligands are presented. The crystal structures of these compounds were determined by single crystal X-ray diffraction. Consequently, the explicit formulas and shorthand notations of the compounds are [Ni(NCS)2(C5H6N2)2(H2O)]·(H2O) (1), [Ni(NCS)2(C5H6N2)3]·(C2H6) (2), and [Ni(NCS)2(C5H6N2)4]·2(C5H6N2) (3). The consistency of the crystal structure data was confirmed by elemental analysis and infrared spectroscopy. These coordination compounds are Werner-like-type clathrates containing water, ethane, and 3-aminopyridine molecules as guest molecules in their structures, respectively. According to …
Investigation Of The Enzyme-Inhibitory, Antibacterial, And Anticancer Properties Of Metal Phthalocyanines, Meryem Topal, Fevzi̇ Topal, Firat Yilmaz, Esra Bulut Atalay, Ümi̇t Muhammet Koçyi̇ği̇t, Emre Güzel
Investigation Of The Enzyme-Inhibitory, Antibacterial, And Anticancer Properties Of Metal Phthalocyanines, Meryem Topal, Fevzi̇ Topal, Firat Yilmaz, Esra Bulut Atalay, Ümi̇t Muhammet Koçyi̇ği̇t, Emre Güzel
Turkish Journal of Chemistry
In this study, the enzyme inhibitory, antibacterial, and anticancer activities of a phthalonitrile derivative and its metal phthalocyanines (Pcs; indium, zinc, copper, cobalt, and manganese; 1–6) were investigated. The cobalt and manganese Pcs were synthesized for the first time in this study. The inhibitory activities of the symmetric Pcs, which were expected to interact with acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) via their 4-(isopropylbenzyl)oxy substituents through host–guest interactions, were investigated. More selective inhibition of AChE than BChE was observed for these compounds. For AChE, CoPc was identified as the most potent inhibitor (IC50 = 14.81 nM), whereas for BChE, InPc was …
Templating Effect Of Neutral Dithiane Ligands On The Self-Assembly Of Cationic Au(I)-Phosphine Units, Farzane Osanlou, Abdollah Neshat, Mohammad Reza Yousefshahi, Vaclav Eigner, Michal Dusek, Shahram Seidi
Templating Effect Of Neutral Dithiane Ligands On The Self-Assembly Of Cationic Au(I)-Phosphine Units, Farzane Osanlou, Abdollah Neshat, Mohammad Reza Yousefshahi, Vaclav Eigner, Michal Dusek, Shahram Seidi
Turkish Journal of Chemistry
The interactions between the dinuclear Au(I) precursor (dppm)Au2Cl2 and neutral sulfur-containing dithianes (specifically 1,3- and 1,4-dithiane) were examined in the presence of NH₄PF₆. Although these sulfur-based ligands were initially employed to facilitate the formation of mixed phosphine/sulfur Au(I) complexes, single-crystal X-ray diffraction analysis revealed the unexpected generation of multinuclear Au(I) assemblies exclusively coordinated by phosphine ligands. When 1,3-dithiane was present, a trinuclear Au(I) complex was isolated, characterized by a central four-coordinate Au(I) center exhibiting a distorted see-saw geometry, flanked by two terminal Au(I) centers with T-shaped coordination environments. Importantly, the dithiane ligand did not coordinate directly to the gold centers …
Nucleophilic Cyclization Of N-Propargylated Pyrazole-5-Carboxylates: Synthesis Of Pyrazolo[1,5-A]Pyrazin-4(5h)-One Derivatives, Meli̇k Firat Mengeş, Meltem Tan Uygun
Nucleophilic Cyclization Of N-Propargylated Pyrazole-5-Carboxylates: Synthesis Of Pyrazolo[1,5-A]Pyrazin-4(5h)-One Derivatives, Meli̇k Firat Mengeş, Meltem Tan Uygun
Turkish Journal of Chemistry
Cyclization reactions are among the most important and widely used methods for synthesizing biologically active fused heterocyclic compounds. In the present study, pyrazolopyrazinone derivatives (10a–i) were synthesized from N-propargylated pyrazoles via nucleophilic cyclization with hydrazine hydrate under a nitrogen atmosphere. Nuclear magnetic resonance (NMR) spectral analyses confirmed that ring closure proceeded in a manner consistent with the formation of a six-membered pyrazinone moiety. In addition, the pyrazolotriazepinone derivative 15c was synthesized using an alternative approach. In this method, substitution with chloroacetone was first carried out, followed by ring closure with hydrazine hydrate, affording a seven-membered triazepinone system. Comparison of the …
Sensitive Stripping Voltammetric Determination Of An Anthracene–Isatin Schiff Base In Biological Samples, Gökçe Öztürk, İrem Gökgöz, Emi̇ne Arslan, Eli̇f Şi̇şman, İnci̇ Seli̇n Doğan, Di̇lek Kul, Fatma Ağin
Sensitive Stripping Voltammetric Determination Of An Anthracene–Isatin Schiff Base In Biological Samples, Gökçe Öztürk, İrem Gökgöz, Emi̇ne Arslan, Eli̇f Şi̇şman, İnci̇ Seli̇n Doğan, Di̇lek Kul, Fatma Ağin
Turkish Journal of Chemistry
In the present study, the electrochemical behavior and quantitative determination of the Schiff base 3-[(anthracen-2-yl)imino]-5-nitro-1,3-dihydro-2H-indol-2-one (ANT) were investigated for the first time using voltammetric techniques at a glassy carbon electrode. The effects of solvent composition, pH, and scan rate on the redox behavior of ANT were systematically evaluated. The compound exhibited an irreversible oxidation process governed by adsorption-controlled kinetics. Quantitative analysis was conducted using differential pulse stripping voltammetry (AdS-DPV) and square-wave stripping voltammetry (AdS-SWV) under optimized conditions. Both methods exhibited linear responses over the concentration range of 0.2–8.0 μM, with limits of detection of 0.0366 μM and 0.0433 μM for …
Influence Of Precursor Synthesis Temperature And Hydrothermal Alkaline Medium On Agglomeration And Crystal Phase Of Barium Titanate Nanoparticles, Murat Özen
Turkish Journal of Chemistry
Phase‑pure, cube‑like barium titanate (BaTiO3) nanoparticles were synthesized via hydrothermal treatment of a single‑source barium-titanium peroxo-hydroxide precursor. Precursor solutions prepared at room temperature, 0 °C, and –10 °C with various storage times exhibited Ba/Ti molar ratios ranging from 0.66 to 1.05 as determined by X-ray fluorescence. Cooling the precursor solution to –10 °C effectively suppressed the polymerization of Ti-O-Ti, yielding near‑ideal stoichiometry and finer precursor particles. Subsequent hydrothermal processing in NH4OH, KOH, and NaOH (0.5–10 M, 100–200 °C) revealed the strong dependence of agglomeration and morphology on the alkaline medium. While NH4OH and KOH resulted in severe agglomeration and the …
Cover And Contents, Editors Of Turkish Journal Of Agriculture And Forestry
Cover And Contents, Editors Of Turkish Journal Of Agriculture And Forestry
Turkish Journal of Agriculture and Forestry
No abstract provided.
Spectrophotometric Detection Of Food Additives And Pesticides By Magnetite Cross-Linked Tyrosinase Aggregates (Mcltas), İlker Polatoğlu
Spectrophotometric Detection Of Food Additives And Pesticides By Magnetite Cross-Linked Tyrosinase Aggregates (Mcltas), İlker Polatoğlu
Turkish Journal of Agriculture and Forestry
In this study, tyrosinase enzyme was cross-linked with glutaraldehyde to form aggregates on the surface of activated magnetite nanoparticles, without the need for a separate support matrix. For the first time, this novel aggregate was employed for the spectroscopic detection of ascorbic acid (AA) and diazinon, as model food additives and pesticides, respectively. This technique, developed as an alternative to optical sensors, not only eliminates their drawbacks but also facilitates the recovery of cross-linked enzyme aggregates (CLEA) from the reaction medium using the incorporated magnetite nanoparticles. A spectrophotometric technique was used to measure the enzyme activity of the aggregates to …
Silicon-Mediated Enhancement Of Wheat Tolerance To Drought Stress: A Comparative Study Of Antioxidant Activity, Photosynthesis, Secondary Metabolites, And Yield, Abida Kausar, Rida Yasmeen, Shahid Iqbal, Muhammad Bilal Hafeez, Asif Mukhtiar, Sadia Azeem, Ali Raza, Samreen Nazeer, Muhammad Zubair Akram, Muhammad Kamran, Fahd Rasul, Noreen Zahra
Silicon-Mediated Enhancement Of Wheat Tolerance To Drought Stress: A Comparative Study Of Antioxidant Activity, Photosynthesis, Secondary Metabolites, And Yield, Abida Kausar, Rida Yasmeen, Shahid Iqbal, Muhammad Bilal Hafeez, Asif Mukhtiar, Sadia Azeem, Ali Raza, Samreen Nazeer, Muhammad Zubair Akram, Muhammad Kamran, Fahd Rasul, Noreen Zahra
Turkish Journal of Agriculture and Forestry
Drought stress (DS) is a major constraint on optimal plant growth and yield. Agricultural researchers have been actively exploring fertilizers that can enhance crop production under DS conditions. Silicon (Si) application has emerged as a promising strategy for managing DS in various crops. This study investigated the potential of Si soil drenching to mitigate the adverse effects of varying levels of DS (at 100%, 70%, and 40% field capacity) in wheat. Two varieties (Ujala-2016 and FSD-2008) were used to evaluate the influence of Si (2.5 mM) on antioxidant activity, oxidative burst, secondary metabolites, growth, and yield. The results indicated that …