Browsing by Author "Kandemirli F."

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A B3LYP/DFT Study on the Structure Activity Relationship for Benzimidazole Derivatives in Water Solution
(2022-08-01) Al-Sawaff Z.H.; Basaran M.A.; Kandemirli F.
Abstract: In this article, a theoretical chemical study on 41 benzimidazole derivatives compounds used to treat osteoporosis was performed in water phase using density functional theory (DFT) based on the 6-311 basis set and B3LYP method as the level of theory to calculate energetic behavior and quantitative chemical descriptors such as energy gap between HOMO and LUMO, the total energy of different orbital transitions, chemical hardness, softness, electrophilicity index, and electronegativity. The results showed a noticeable difference between the compounds concerning chemical parameters due to substituting the active chemical molecules at the compounds’ R1, R2, R3, and R4 sites. The results showed that compound no. 3 could be considered the most exciting compound due to its unique values obtained. On the other hand, it was found an appropriate relationship between the quantitative arithmetic variables and the IC50 values for each compound. Statistical analysis between the compounds under test and a quantitative descriptor of the ten traits were included to produce two different prediction models based on artificial neural networks due to negative and positive IC50 values after data pre-processing.
A Comparative Density Functional Theory Study of BMSF-BENZ Chemisorption on Zn12O12, Al12P12 Nanocages
(2022-01-01) Al-Sawaff Z.H.; Dalgic S.S.; Najim Z.A.; Othman S.S.; Kandemirli F.
The present study aims to investigate the potential and capability of Zinc-Oxide nanocage and aluminum phosphide nanocage to detect and adsorb ((4-Bromo-7-methoxy-1-(2-methoxyethyl)-5-{[3-(methylsulfonyl) phenyl]methyl}-2-[4-(propane-2-))yl) phenyl]-1H-1,3-benzothiazole) molecular. For this purpose, we selected seven stable locations for BMSF-BENZ to be adsorbed on the surface of these nanocages. All considered configurations are optimized using DFT theory at the 6-31G** basis set and B3LYP level of theory. Then from optimized structures, the Quantum theory of atom in the molecule (QTAIM), Reduced density gradient (RDG) Analysis, and Molecular Orbital Analysis (MO) were performed. The results showed that the reaction of BMSF-BENZ with the nanocages was highly exothermic, indicating the high chemical adsorption of the new complexes. The adsorption energies on the ZnO nanocage were higher than those of AlP for all the investigated active atoms in the drug complex, where the adsorption energies were (-28.20, -37.86, -27.36, -23.59, -30.30, -42.55, and -32.49) Kcal/mol, and (-17.03, -28.30, -15.45, -16.70, -18.22, -18.35, and -18.64) Kcal/mol for ZnO and Al-P nanocages respectively. Topology analyses such as QTAIM and NCI/RDG indicate that the interactions between the BMSF-BENZ drug and the surface of the ZnO nanocage are more substantial than those of the AlP nanocage. The results of the obtained charge, the total density of states (TDOS), and molecular orbital-boundary analysis confirm a characteristic orbital hybridization upon adsorption of BMSF-BENZ, indicating the potential application of AlP as a biochemical adsorbent for BMSF-BENZ. Nevertheless, ZnO nanocage could be a candidate for drug delivery applications.
A comparative DFT study on Al- and Si- doped single-wall carbon nanotubes (SWCNTs) for Ribavirin drug sensing and detection
(2023-05-01) Dalgic S.S.; Al-Sawaff Z.H.; Dalgic S.; Kandemirli F.
In this work, we have presented a comparative study on Ribavirin (RBV) drug sensing and detection on the pristine and functionalized single-wall carbon nanotubes (f-SWCNTs) by Density Functional Theory (DFT) method. The pristine and metal-doped zigzag (4,0) and (6,0) SWCNTs were first considered for the RBV adsorption. All the probable positions of RBV adsorption were investigated to find which one is energetically favourable. The topology analysis of the Quantum theory of atoms in a molecule (QTAIM) with non-covalent interactions (NCI-RDG), Frontier molecular orbitals (FMO), Density of states (DOS), and non-linear optical (NLO) analysis were carried out to understand the molecular structure, electrical, electronic and optical properties of complexes. The charge analysis indicates that charge transfer is from the adsorbed RBV to the pristine and metal-doped (4,0) and (6,0) SWCNTs. The highest values of adsorption energies for Al-, Si-doped and pristine (4,0) SWCNTs were determined as −34.688, −87.999 and −10.382 kcal/mol, respectively, whereas corresponding values for metal-doped and pristine (6,0) SWCNTs are about −43.592, −20.661 and −12.414 kcal/mol, respectively. The results suggest that those bare and metal-doped (4,0) SWCNTs and (6,0) Si-SWCNTs can serve as promising sensors in practical applications to detect, recognize and carrier RBV drug for its medicinal drug delivery applications. Based on the NLO properties of (6,0) Si-SWCNTs and pristine (6,0) SWCNT (with an acceptable recovery time of 279s and first hyper polarizability value of β = 229.25 × 10−30 cm5 esu−1), those nanotubes may be possible candidates to be used as the optoelectronic sensor for RBV drug. The appropriate short length of nanotubes was obtained.
A DENSITY FUNCTIONAL THEORY (DFT) STUDY ON SILICON DOPED CARBON NANOTUBE Si-CNT AS A CARRIER FOR BMSF-BENZ DRUG USED FOR OSTEOPOROSIS DISEASE
(2022-01-01) Al-Sawaff Z.H.; Dalgic S.S.; Kandemirli F.
This study aims to investigate the capability of Silicon-Doped Carbon Nanotube (Si-CNT) to detect and adsorb the BMSF-BENZ ((4-Bromo-7-methoxy-1-(2-methoxyethyl)-5-{ [3-(methylsulfonyl)phenyl] methyl}-2-[ 4-(propane-2-))yl) phenyl ]-1H-1, 3-benzothiazole) molecular. For this purpose, we considered different configurations for adsorbing BMSF-BENZ drugs on the surface of the Si-CNT nanotube. All considered configurations are optimized using the density functional theory (DFT) at the 6-31G** basis set and B3LYP-B97D level of theory. Then from optimized structures, for each nanoparticle, we selected seven stable locations for the adsorption of BMSF-BENZ in (Br, N8, N9, N58, O35, O41 and S) active atoms on the surface of the selected nanoparticle. The quantum theory of atoms in molecules (QTAIM), reduced density gradient (RDG) analysis, and molecular orbital (MO) analysis were also established. The calculated results indicate that the distance between nanotube and drug from the N8 site is lower than from all other locations sites for all investigated complexes, and adsorption of BMSF-BENZ from the N8 site is more favorable for the Si-CNT nanotube. The adsorption energy, hardness, softness, and fermi energy results reveal that the interaction of BMSF-BENZ with Si-CNT is a promising adsorbent for this drug as Adsorption energy Eads of BMSF-BENZ/Si-CNT complexes are (-13.08,-43.50,-17.90,-31.29,-25.57,-16.56, and-28.05) kcal/mol in the gas phase. As well, the appropriate and spontaneous interaction between the BMSF-BENZ drug and Si-CNT nanoparticle was confirmed by investigating the quantum chemical molecular descriptors and solvation Gibbs free energies of all atoms.
A DFT study on the size and defect induced properties of 2H-Au nano surface by small molecules adsorption
(2023-03-01) Sakarya A.; Senturk Dalgic S.; Dalgic S.; Kandemirli F.
The size effect and defect-related properties of the Au nanosurface in the hexagonal phase (Au2H) have been investigated by Density Functional Theory (DFT) using the adsorption of small molecules. The OH, H2O, H2O2, C2H5OH, H2 and O2 molecules were considered. The atomic H and O adsorption were also taken into account for comparison. The adsorption distances, energies, frontier molecular orbitals and density of state analysis of small molecules on top, bridge and hollow sites of the Au2H surfaces were computed in conjunction with charge distribution analysis. The size, dimension and phase-dependent adsorption energies were obtained by comparison with previous calculations. The complexes’ stability changes with the sites and interacting groups. Apart from H2O2 and C2H5OH on top site of Au2H, all studied groups’ adsorption shows exothermic character. The adsorption energies reveal the order O > OH > H > H2O> O2. The Au2H surface is most sensitive to H, O, OH and O2. Therefore, the Au2H can serve as a promising sensor to detect and recognize those atoms/molecules in practical applications. The Au2H also has potential applications as a work function-type sensor for H, OH and C2H5OH. The size limit of Au2H was defined.
A microcontroller based microfluidic biochip for calcium percentage detection in blood
(2022-04-01) Al-Sawaff Z.H.; Rashid Z.M.; Al-Okby M.F.R.; Kandemirli F.
Apheresis is an essential step in clinical diagnostic. Searching for a safe and fast way was necessary to avoid wasting time and obtain the desired results efficiently. This research includes two stages: First, a microfluidic biochip with the properties of fast processing response, automation capability, and low-cost was designed having a tiny mesh-type channel that filters pure plasma from the blood components and a straight channel to deliver the pure plasma to a tank. Second, an automated system was designed to detect blood calcium levels using a microcontroller and a colors-detection sensor TCS3200-DB. The device is designed to take a 0.15 to 2.15 mg/dL, 10-160 μm blood sample, which is considered small compared to the samples taken for the blood apheresis process used in laboratories where a substantial quantity of pure plasma is obtained naturally. Pure plasma is mixed with calcium detectors R1 and R2 to get a violet-colored solution with a wavelength between 390 nm to 440 nm. The results of the proposed device were compared with the traditional methods used spectroscopy method using concentrations of 10 different blood samples, and the results proved that there is a slight error between the two processes.
A new approach to develop biometric fingerprint using human right thumb fingernail
(2023-07-01) Al-Sultan T.G.; Abduljabar A.Q.; Alkhaled W.H.; Al-Sawaff Z.H.; Kandemirli F.
In this article, we analyzed the structure of human nails to develop a modern biometric authentication system based on the nail bed and finger lunula. The results of the studies on the collected images proved that each fingernail has distinctive characteristics in terms of the length and width of the nail and the lunula, even identical twins. We focused on the fingernail of the right thumb because of its large size and the accuracy and clarity of the nail. The mediation of the indicative points on the nail bed and on the lunula was used to form the pentagonal structure and use it as a region of interest. Then an ensemble independent component analysis, principal component analysis, haar wavelet, and scale invariant feature transformation, were used. Later we classified these algorithms using support vector machine and Naive Bayes techniques, the performance of each algorithm was analyzed by feature extraction with two classifiers. This study was conducted on 100 participants and showed that this new method could be used as a biometric identification system for humans. There was no similarity in results for all verified samples.
Adsorption behavior and corrosion inhibitive characteristics of newly synthesized cyano-benzylidene xanthenes on copper/sodium hydroxide interface: Electrochemical, X-ray photoelectron spectroscopy and theoretical studies
(2020-11-15) Khalifa M.E.; El Azab I.H.; Gobouri A.A.; Mersal G.A.M.; Alharthi S.; Saracoglu M.; Kandemirli F.; Ryl J.; Amin M.A.
Elegant process for synthesis of 3-(7H-dibenzo[c,h]xanthen-7-yl)benzaldehyde (3), as new starting material to create a set of novel xanthene analogues, 2-(3-(7H-dibenzo[c,h]xanthen-7-yl)benzylidene)malononitrile (4), 3-(3-(7H-dibenzo[c,h]xanthen-7-yl)phenyl)-2-cyanoacrylic acid (5), and Ethyl-3-(3-(7H-dibenzo[c,h]xanthen-7-yl)phenyl)-2-cyanoacrylate (6), was achieved starting with available materials under mild conditions. Various concentrations (ca. 0.1–1.0 mM) of the synthesized cyano-benzylidene xanthene derivatives, namely compounds 3–6, were tested as inhibitors to control copper corrosion in alkaline solutions employing polarization and electrochemical impedance spectroscopy (EIS) measurements. Results revealed that the four studied xanthenes derivatives served as efficient (mixed-type) inhibitors. The inhibition efficiency increased with increase in inhibitor concentration.The inhibition performance of studied compounds varied according to their chemical structures. The best inhibitor, compound (5), achieved a maximum inhibition efficiency of 98.7% (calculated from corrosion current densities) and ~ 95% (estimated from charge-transfer resistance values) at a concentration of 1.0 mM. The morphology of the corroded and inhibited copper surfaces was studied by scanning electron microscopy (SEM). The adsorption of the inhibitor molecules was confirmed by high-resolution X-ray photoelectron spectroscopy (XPS) profiles. XPS data were used to compare the inhibition efficiencies exhibited by studied compounds. The oxidation rate of the Cu surface was found to be frivolous, referring to high inhibition efficiency, only in the presence of inhibitor (5), and Cu0 share is 87% of all copper components. The shares of Cu0 were significantly reduced to 43%, 26% and 20% for inhibitors (3), (4) and (6), respectively. These findings go parallel with the results obtained from electrochemical measurements. The quantum-chemical calculations of the investigated molecules were performed to support electrochemical findings, and their correlations with the inhibition efficiency of the synthesized compounds were discussed.
An overview on lambda, epsilon, kappa, iota and zeta variants of covid-19 and its probability to merge with delta & delta plus, why it is a concern
(2022-10-15) Monajjemi M.; Sayiner H.S.; Kandemirli F.; Mollaamin F.
COVID-19 is caused by the virus SARS-CoV-2 that belongs to the Corona groups. The subgroups of the coronavirus families are α, β, γ, and δ coronavirus. On June 15, 2021, the string λ of SARS-CoV-2 was evaluated as a variant of interest via the World Health Organization. This string has a high prevalence in some parts of South American countries, but it occurred only occasionally in Brazil. This study confirms that mutations in the λ-spike protein can be destroyed the neutralizing antibodies and increase infectivity. Coronaviruses such as SARS-CoV-2 have an evolutionary superpower called “recombination” which permits the mixing of their genomes into novel combinations. Unlike regular mutation, which precedes slowly one change at a time, recombination can produce whole changes in a coronavirus genome. Although right now, is a concern, a mixing of λ with other variants such as is much more of a concern compared to alone variants. There is another item: the recombination can arise within the sample after it was taken from the infected person, not while it was inside their body.
An overview on low-level laser therapy (Lllt) & cooling laser therapy (c.l.t.) in medical engineering
(2022-10-15) Monajjemi M.; Alihosseini A.; Kandemirli F.; Mollaamin F.
Some essential methods for overcoming the skin problem during laser therapy are Low-Level Laser Therapy and Cooling Laser Therapy in cooling the most superficial layers of the skin. Although melanin absorption will result in heat production during laser exposure, cooling the epidermis can prevent its temperature elevation from exceeding the threshold for thermal injury. L.D.C. is a technique for laser cooling of small particles. Low-Level Laser Therapy (LLLT), consisting of Low-intensity radiation in specific wavelengths, has been discussed to trigger cellular proliferation and differentiation through molecular mechanic mechanisms. This work studied the propagation of the laser beam into biological tissue such as the brain and skin by the Monte Carlo method. What is generally accepted is that the energy density required is very small, and the transmit power is less than 0.6 Watts.
An Overview on Nature Function in Relation with Spread of Omicron-Covid-19: Where Will the Next Pandemic Begin and Why the Amazon Forest Offers Troubling Clues
(2023-06-15) Monajjemi M.; Kandemirli F.; Mollaamin F.; Küçük Ö.
The effect of COVID-19 vaccination also depends on the population that accepts vaccines. Improving the COVID-19 vaccination methods will be tremendous to human health and the world economy. So, in this work, we use an interdisciplinary knowledge from climates, social sciences, geography, jungle, forestry and wood industry, genetic analysis, and computational biophysics, including artificial intelligence and docking simulation. The emergence of the omicron variant raises serious concerns because of the initial observation of a significant growth advantage compared to the Delta, lambda, beta, and gamma variants. Although the omicron variant preliminary observed in the EU/EEA and Asian countries depend on travel, several are now observed as parts of pandemic clustering in this zoon. Since, even if the severity of the disease is lower compared with other variants, particularly Delta, the fast transmissibility and resulting exponential growth of cases will soon outweigh any benefits of a potentially reduced severity. This research showed that though omicron covid-19 death cases are less severe than Delta, Omicron will be an important base for the emergence of new further variants through huge mutations in the future, which some are so dangerous. Due to the wet climate, the Amazon jungle is a suitable substrate for emerging any further corona variants.
Analysis of DNA protection, interaction and antimicrobial activity of isatin derivatives
(2019-02-01) Ganim M.A.; Baloglu M.C.; Aygun A.; Altunoglu Y.C.; Sayiner H.S.; Kandemirli F.; Sen F.
Isatin, thiosemicarbazone and their derivatives have been widely used in biological applications such as antimicrobial, antiviral and anticancer therapies. Herein, eight isatin and thiosemicarbazone derivative compounds were re-synthesized and evaluated for DNA binding analysis including DNA protection studies using plasmid DNA (pUC19) and DNA interaction experiments using calf thymus DNA (CT-DNA). All compounds were also utilized in vitro assay to assess the antimicrobial activity of compounds against different pathogenic bacterial strains. All isatin and thiosemicarbazone derivative compounds exhibited DNA protection activity which ranged from 23.5 to 59.5%. Among them, I3-(N-2-MP)-TSC had the greatest DNA protective activity. For DNA binding analysis, all compounds had the same constant concentration (40 μM), which interacts with CT-DNA. It was also observed that DNA interactions gave a high intrinsic binding constant (Kb = 1.72 × 104 M−1–9.73 × 105 M−1). Besides, several derivatives of isatin thiosemicarbazone exhibited significant and selective antibacterial activity with low concentration. These compounds primarily affected Gram-positive bacteria, but were not effective against P. vulgaris and E. coli. The Gram-positive methicillin-resistant S. aureus ATCC 43300 (MRSA) was the most influenced strain by these compounds. It was found that methyphenyl group at isatin was essential for its antibacterial activity for MRSA.
Analysis of pyridine, picoline and lutidine’s adsorption behavior on the Al (111)-lattice
(2022-06-15) Mollaamin F.; Kandemirli F.; Monajjemi M.
The reactivity and adsorption behavior of five organic inhibitors of pyridine and its derivatives of 2-picoline, 3-picoline, 4-picoline, and 2,4-lutidine at the Al(111) lattice in hydrochloric acid was studied by the principle of the HF and B3LYP level using the 6-31G and LANL2DZ basis sets from the program package gaussian 03. The compound was adsorbed on the metal lattice based on the calculated results, mainly in their protonated forms. In the Al (111)-lattice, the charge is transferred to the inhibitor, and the organic inhibitor is adsorbed at the Al (111)-lattice in an inclined state. The quantum chemical calculations of molecular reactivity show that the frontier orbitals of the four additives are distributed around the nitrogen atom of the pyridine ring, the aluminum atom of Al (111)-lattice, and active electrophilic centers are located on the nitrogen atoms of the pyridine ring. All five molecules were adsorbed with the chemical adsorption on the Al (111)-lattice, and the order of adsorption was 2-picoline>2, 4-lutidine> 4-picoline> 3-picoline> pyridine. The N atoms of four derivatives form N-Al bonds with the Al atoms of the Al (111)-lattice, which makes derivatives stably adsorb on the Al lattice.
Anthocyanin compounds of the persian sour cherry (Prunus cerasus l) as the fruit with high antioxidant properties
(2022-06-15) Mollaamin F.; Kandemirli F.; Monajjemi M.
In this work, it has been explained that the significant parameter for increasing the absorbed amount in a direct non-linear track to moving from the Beer-Lambert principle is the self-conjoint of anthocyanins of cy, dp, and pt compounds.The shifting of enthalpy between acn-Al3+/Ga3+/Cr3+/Fe3+/Mg2+ liaison compounds has been studied the double conjunctions and carbonyl groups due to the linkage of B ring for cy, dp, and pt of anthocyanins in vacuum and water ambiance debating the strongness and color of acn-Al3+/Ga3+/Cr3+/Fe3+/Mg2+ linkage of cy, dp, and pt structures in a weakly acidic medium in the Iranian sour cherry. The ACNs including Cy, Dp, and Pt within the largest linkage in the strong part of these compounds by metal cations of Al3+/Ga3+/Cr3+/Fe3+/Mg2+ cause a different limit of colors under acidic pH. Besides, the charge density and electron charges have been received by matching the electrostatic capacity to a constant charge of O+17, O+16, and O+7 particles for cy-Mn+(n:31), dp-Mn+ (n:32) and pt-Mn+(n:35), using the electrophilic parts of cy, dp and pt anthocyanin unities thet indicate the mouvement and the resistance of these structures in the reel samples like persian sour cherry.
Azo-dye antibacterial with nanotube-[sio2(Oh)2]9 system for drug delivery investigation
(2022-12-15) Monajjemi M.; Kandemirli F.; Mollaamin F.
Azo dye, [SiO2 (OH)2 ]9 molecular ring, and single-walled carbon nanotubes (4,4) SWCNT were considered like an axle, a wheel, and stoppers, respectively. The combination of the azo dye on the [SiO2 (OH)2 ]9 molecular ring with (4,4) SWCNTs may be thought of as a non-covalent system in UV light-isomer-machine. A new molecular motor system that runs like a hinge motion is demonstrated like light-powered molecular hinges. A new molecular motor system that acts as a hinge motion has been demonstrated and introduced as light-moving molecular hinges. By emitting various ultraviolet, visible lights, the [SiO2 (OH)2 ]9 molecular ring in the system can be reversed with the various dumb-bell size on one side attached halogens and fixing it on the other side of the (4,4) SWCNTs surface, a variety of systems in a wide variety of ultraviolet sensors can be designated to a better model of molecular machines and can be used for drug delivery of some antibiotics that are difficult to administer by straight injection. Molecular machines containing a wide variety of ultraviolet sensors have been designed with the combination of azo derivatives formed by replacing different halogens with hydrogen in the azo dye on the [SiO2 (OH)2 ]9 molecular ring to the (4,4) SWCNTs surface.
Bent Rule Theoretical Studies Of Nonmetal Fluorides
(2007) Kandemirli F.; Hoscan M; Ozturk A.; Uluadaoglu E.
Biophysical interface of anti-matter for virtual living in real world: A reality in chemical converted in parallel worlds
(2022-01-01) Monajjemi M.; Kandemirli F.; Sakhaeinia H.; Mollaamin F.
We are going to discuss biology and the biophysical phenomenon of the anti-matters, both experimentally and theoretically or philosophically. Anti-matter is used to treat cancer and thymine dimer problems due to UV radiation. Positrons are beamed through tissue at such velocity that they do not annihilate until they encounter cancer cells. Formed gamma rays damage the cancer tissue. Nowadays, anti-matter is used in positron emission tomography (PET). In evolutionary biology, where we see evidence that consciousness has emerged in at least humans, lifeforms can self-organize to exhibit collective emergent super-consciousness. In this work, we are looking at an ontological explanation of the relationship between the results obtained with the Ecology. The proton transfer mechanism is a critical phenomenon that is related to the acid-base characteristics of the nucleobases in Watson–Crick base pairs. They exhibited a strong probability for protons to change place within the hydrogen bond due to quantum tunneling, which will alter the genetic code and cause mutations. These mutations could be the cause of several diseases such as cancer. Probably, the quantum tunneling effect (such as proton transfer) appears in micro parallel worlds.
Bis(4-methylpiperidinyl)-phenylphosphine and bis(4-benzylpiperidinyl)- phenylphosphine: Synthesis, derivatization, molybdenum complexes and DFT calculations
(2014-01-01) Sariöz O.; Kandemirli F.; Öznergiz S.
Functionalized bis(amino)phosphines of the type PhP(NR2) 2 have been synthesized by treating PhPCl2 with 4-methylpiperidine or 4-benzylpiperidine. The ligands react with aqueous hydrogen peroxide, elemental sulfur or selenium to give the corresponding chalcogenides in good yield. The molybdenum complexes of the bis(amino)phosphines have been obtained. All of the compounds were obtained in good yields and were characterized by IR, NMR and elemental analysis. Quantum chemical calculations, such as HOMO-LUMO energies, Mulliken charges etc., were carried out using B3LYP/6-31G(d,p), a version of the DFT method with the standard gaussian 09 software package program for the bis(amino)phosphines and their chalcogenides. The experimental and theoretical results show that PPh(NC5H9CH3)2 (1) and PPh(NC 5H9CH2C6H5)2 (2) are strong σ-donors and have similar electronic properties. © 2013 Elsevier Ltd. All rights reserved.
Bis(amino)phosphines derived from N-phenylpiperazine and N-ethylpiperazine: Synthesis, Oxidation reactions, and molybdenum complexes
(2013-02-01) Sariöz O.; Öznergiz S.; Kandemirli F.
Functionalized bis(amino)phosphines that are the type PhP(NR 2)2 (1,2) have been synthesized by treating PhPCl 2 with N-phenylpiperazine or N-ethylpiperazine. Ligands react with aqueous hydrogen peroxide, elemental sulfur, or selenium to give the corresponding chalcogenides (3-8) in good yield. The molybdenum complexes of the bis(amino)phosphines (9,10) have been obtained. All of the compounds obtained in good yields and they were characterized by IR, NMR, microanalysis, and also quantum chemical calculations such as HOMO-LUMO energies, Mulliken charges, and dipole moment for compounds 1-8 and complex 9 were carried out by using B3LYP/6-31G(d,p), a version of the DFT method with standard Gaussian 09 software package program. Copyright © Taylor & Francis Group, LLC.
Blood vessel segmentation and extraction using H-minima method based on image processing techniques
(2021-01-01) Boubakar Khalifa Albargathe S.M.; Kamberli E.; Kandemirli F.; Rahebi J.
In this paper, the H-minima transform is used for blood vessel segmentation. The aim of this study is to get the high accuracy of blood vessel segmentation in retinal images. In this study the good result and good performance were got. We compared our result with other methods. Also for simulation result we implemented on DRIVE and STARE database. The proposed method shows very remarkable performance on pathological retinal images. For the implementing of the proposed method MATLAB 2019a software is used. The running time of this method was 1 s for each image and the average accuracy for STARE dataset and DRIVE dataset achieved to 0.9591 and 0.9672 respectively.