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Mercury(II) mixed ligand complexes of phosphines or amines with 2-cyanoamino thiophenolate ligands formed via monodeprotonation and carbon-sulfur bond cleavage of 2-aminobenzothiazole. X-ray crystal structures of [Hg(SC6H4NCN)(PPh3)]2 and [Hg(SC6H4NCN)(Ph2PCH2PPh2)]2

by: د. مصطفى الهيتي

URL link: https://doi.org/10.1016/j.poly.2021.115349

Description : The addition of sodium hydroxide to a mixture of phenyl mercury acetate and 2-aminobenzothiazole in warm ethanol led to the high yield (84%) formation of [Ph-Hg(LH)]n (1), LH = the 2-cyanoaminothiaphenolate anion (SC6H4NHCtriple bondN)−, resulting from monodeprotonation of 2-aminobenzothiazole and facile carbon–sulfur bond breakage. Reaction of 1 with Ph3P or Ph3PS afforded [Hg(LH)2(Ph3P)2] (2) or [PhHg(μ-LH)(Ph3PS)]2 (3), respectively. Recrystallization of 2 from warm DMSO afforded [Hg(μ-L)(PPh3)]2 (4), L = the 2-cyanoaminothiophenolate di-anion (SC6H4NCtriple bondN)2−, which was characterized by an X-ray diffraction study. Treatment of 1 with the diphosphines Ph2P(CH2)nPPh2, 2,6-diaminopyridine (dapy), ethylenediamine (en) or 1,10-phenanthroline (phen) afforded [PhHg(LH){ Ph2P(CH2)nPPh2}], {n = 1 dppm (5), n = 2 dppe (6), n = 3 dppp (7), n = 4 dppb (8), (CH2)n = (Cp)2Fe dppf (9)}, [PhHg(LH)(dapy)2] (11), [PhHg(LH)(en)] (12) or [PhHg(LH)(phen)] (13). Recrystallization of 5 from CH2Cl2 afforded the binuclear complex [Hg(μ-L)(η1-dppm)]2.CH2Cl2 (10), which has been characterized by an X-ray diffraction study.

Pathology and cytogenetically study on toxic effect of inhaled benzene among male rats

by: د. سحر حسين علي

URL link: https://www.annalsofrscb.ro/index.php/journal/article/download/6819/5123/12217

Description : Thirty six Swiss albino male rats, in 12 weeks study exposure whole body (inhaled) to benzene at concentration of 0 , 400 ppm , 800 ppm = ( 0 , 672 mg / m 3 , 1.343 mg / m 3 ) respectively, 5 hr. / day for 4 days / week for 12 weeks. Cytogenetic examination by micronuclei (MN) assay and chromosomal aberrations (CA) of the three groups at 6 and 12 weeks of exposure, were significantly increased P<0.01 specially in 800 ppm group at 6 weeks of exposure, Exposure rats to benzene reported clinical signs characterized by hypoactivity and convulsion .Histopathological lesions revealed neoplastic lesion in bronchi lung with liver adenocarcinoma than those observed in historical control.

Antimicrobial activity of Iraqi natural honey against some microbial pathogens of human

by: د. سارة عادل عبيد

URL link: https://connectjournals.com/03896.2021.21.1259

Description : The current study aims to evaluate the antimicrobial activity of Iraqi natural honey against a number of pathogens of humans, as follows: Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli and Bacillus cereus, in addition to Candida albicans using the well diffusion method. Eight samples of natural honey were collected from several governorates for the period from February 2019 to September 2019. After the results showed that the honey samples were not contaminated with microbes as well as no fermentation and that density, viscosity, crystallization and pH came within the recommended international standard specifications, several concentrations of natural honey samples were performed, represented by concentrations (100%, 75%, 50% and 25%). The results revealed that the Iraqi natural honey possessing an antimicrobial activity under study, this efficacy act varies according to the sample, the microbe and the concentration, where the best was Sidr honey with an average diameter of the inhibition zone 35 (mm) followed by Caleptose honey (34 mm) followed by Sesame honey and Olive while the lowest effect was Pear honey, the concentration was 100%, the most effective, followed by the two concentrations 75% and 50% and the concentration 25%, it had no inhibiting activity towards all types of microbes studied. By comparison between the effectiveness of Iraqi honey and commonly used commercial antibiotics, it was found that the effect of honey exceeded that of commercial antibiotics used in the study.

Synthesis, characterization and H2 uptake of novel Hg(II) complexes containing 1,4-benzothiazin-3-one

by: د. مصطفى الهيتي

URL link: https://doi.org/10.1016/j.matpr.2020.07.091

Description : Treatment of 1,4-benzothiazin-3-one (Hbto) with mercury(II) acetate Hg(OAc)2 in 2:1 mol ratio affords [Hg(bto)2] (1) in 99% yield. The resulted complex was used as a synthon to prepare new mixed-ligand complexes with monophosphines or diphosphines of the types [Hg(bto)2(L)2] or [Hg(bto)2(L-L)]; where L = triphenylphosphine (Ph3P) (2) or triphenylphosphinesulfide (Ph3PS) (3); L-L = 1,2-bis(diphenylphosphino)ethane (dppe) (4) or 1,1′-bis(diphenylphosphine)ferrocene (dppf) (5). FTIR, 1H NMR, 13C NMR, 31P-{1H} NMR, molar conductivity and elemental analysis were used to characterize the resulted complexes. Results suggest that 'bto' ion in [Hg(bto)2] (1) is linked to mercury ion via exocyclic oxygen and endocyclic nitrogen atoms in a chelating bidentate fashion while in the complexes (2–5), it is linked to mercury ion via endocyclic nitrogen atom in a monodentate fashion. Furthermore, to take benefit of mercury complexes which were classified as toxic compounds, [Hg(bto)2] (1) complex has been evaluated for its susceptibility to hydrogen storage. The result of H2 storage showed that this complex can store 1.42 wt% of hydrogen under 88 bar and 77 K.

Biological activity and laser efficacy of new Co (II), Ni (II), Cu (II), Mn (II) and Zn (II) complexes with phthalic anhydride

by: د. مصطفى الهيتي

URL link: https://doi.org/10.1016/j.matpr.2020.07.083

Description : This article included preparation and spectroscopic diagnosis of new cobalt(II), copper(II), nickel(II), manganese(II) and zinc(II) complexes with phthalic anhydride (PL) ligand using a mole ratio of 1 Metal: 1 PL. The as-prepared complexes were characterized using 1H NMR, UV–Vis, FTIR, magnetic susceptibility and C.H.N. The measurements indicate that PL ligand was linked to the divalent metal ions as bridging bidentate through oxygen atoms. The microbicide activity for the synthesized complexes against four types of bacteria (E. coli, S. epidermidis, K. pneumoniae, and S. aureus) was achieved. Moreover, the stability of the complexes on laser beam was demonstrated and the results prove that the complexes were stable under the laser beams used for 10–30 s.

Novel dithiocabamate nano Zn(II), Cd(II) and Hg(II) complexes with pyrrolidinedithiocarbamate and N,N-diethyldithiocarbamate

by: د. مصطفى الهيتي

URL link: https://doi.org/10.1016/j.matpr.2020.07.082

Description : The reaction of the equimolar ratio of ammonium pyrrolidinedithiocarbamate {(NH4)PyDT} and sodium N,N-diethyldithiocarbamate (NaEt2DT) with the divalent ion salts of zinc, cadmium and mercury resulted in the complexes of the type [M(κ2-PyDT)(κ2-Et2DT)]; {M(II) = Zn, Cd, Hg}. These complexes were characterized using different techniques: elemental analysis, molar conductivity, FTIR, 1H NMR, 13C{1H} NMR and HSQC. The results demonstrate the bidentate chelating mode of the two dithiocarbamate ligands through the sulfur atoms to afford a tetrahedral geometry around the metal ion. Surprisingly, these coordination compounds were obtained as nanocomplexes with regular geometrical nanostructures as follows; [Zn(κ2-PyDT)(κ2-Et2DT)] (1) as nanosheets with a thickness of 21–24 nm, [Cd(κ2-PyDT)(κ2-Et2DT)] (2) as nanorods with a diameter of 70–380 nm while [Hg(κ2-PyDT)(κ2-Et2DT)] (3) was found as merged nanospheres with a diameter of 54–70 nm. These nanostructures have been demonstrated using the SEM and X-ray diffraction of the powder.

Hydrogen storage capacity of novel mixed ligand complexes of lead(II): Molecular structure of [Pb2(tsac)4(µ-dppe)]

by: د. مصطفى الهيتي

URL link: https://doi.org/10.1016/j.inoche.2021.108444

Description : The complex [Pb(tsac)2H2O] has been used as a synthon for the synthesis of a series of lead(II) thiosaccharinate mixed ligand complexes with the tertiary phosphines; PPh3, Ph2P(CH2)nPPh2, n = 1, dppm; n = 2, dppe; n = 3, dppp or the heterocyclic; 2-aminobenzothiophene (abtH), 2-acetamidopyrimidine (aampH) and 2-benzimidazolethiol (bimsH). The prepared complexes were characterized using; IR, 1H-, 31P-{1H} NMR, molar conductivity, elemental analysis in addition, the crystal structure of the complex [Pb2(tsac)4(µ-dppe)] was resolved by x-ray diffraction analysis of a single crystal. [Pb2(tsac)4(µ-dppe)] crystallizes in the triclinic space group P-1 a = 9.0955(5), b = 11.4197(6), c = 15.3174(7) Å, Z = 2 and refined to R1 = 0.0422. Herein, thiosaccharine shows the ability to coordinate to lead(II) center in a variety of modes, which are monodentate, chelate- bidentate via a nitrogen atom and/ or a sulfur atom of the thiole group. Furthermore, the complexes [Pb(tsac)2H2O] and [Pb2(tsac)4(µ-dppe)] were used to examine their ability to store hydrogen. The results show that [Pb(tsac)2H2O] and [Pb2(tsac)4(µ-dppe)] are able to store 0.29 and 1.12 wt% H2, respectively.

Novel organic-inorganic nanohybrids (MnO2 and Ag nanoparticles functionalized 5-methoxy-2-mercaptobenzimidazole): One step synthesis and characterization

by: د. مصطفى الهيتي

URL link: https://doi.org/10.1016/j.matpr.2020.12.707

Description : The study included the synthesis of manganese dioxide nanoparticles using the nitric acid by oxidation method. Moreover, the work involved the chemical synthesis of Ag metal nanoparticles using sodium citrate for reducing Ag ion into Ag metal in its nanoscale form. These nanoparticles were diagnosed using FTIR, XRD, and AFM. The maximum height was 5 nm and 2.5 nm for Ag NPs and MnO2 NPs, respectively. In addition, the novelty lies in the use of the organic compound 5-methoxy-2-mercaptobenzimidazole (MMBI) to synthesis the organic–inorganic nanohybrids which were characterized using FTIR and XRD.

Biogenic silver nanowires for hybrid silver functionalized benzothiazolilthiomethanol as a novel organic–inorganic nanohybrid

by: د. مصطفى الهيتي

URL link: https://doi.org/10.1016/j.matpr.2020.11.846

Description : This article involves the synthesis of a new organic compound, benzothiazolilthiomethanol (BTTM) which derived from the reaction of 2-mercaptobenzothiazole with formaldehyde in ethanol. The resulting compound (BTTM) was diagnosed using the following techniques: FTIR, elemental analysis and 1H NMR. The research also included the preparation of silver nanowires depending on using green method. To enhance the idea even further, both as-prepared materials were spatially used to prepare new nanocomposite of the type organic–inorganic nanohybrid where silver was used to form the core while the organic matter was the shell. The resulting organic–inorganic nanohybrid was characterized using FTIR, XRD, EDX, SEM and TEM. The results of characterization techniques prove that a stable and sufficient amount of BTTM can be attached to the metal surface.

Antagonist Co-Administration of Antiviral Remdesivir with Chloroquine in Patient with COVID-19 Taking ACEI Drug in Hypertension

by: د. تيسير شاكر محمود

URL link: http://annalsofrscb.ro/index.php/journal/issue/view/28

Description : Coronaviruses a positive-sense single-stranded RNA genome ,belong to a family of enveloped viruses that infect humans and animal. They are cause respiratory diseases like severe acute respiratory syndrome coronavirus(SARS), .Middle East respiratory syndrome (MERS) and the emerged severe acute respiratory syndrome coronavirus 2 (SARS-CoV2), the causative agent of the disease “COVID-19”. The protocols of therapy for treatment COVID-19 is used some drugs like hydroxychloroquine, chloroquine phosphate, remdesivir, andlopinavir/ritonavir. The FDA emergency revoked use the combination of hydroxychloroquineand chloroquinein the cure of COVID-19.It has been noted that the patients suffer from cardiovascular disease are increased risk of severe COVID-19. This may be due to the use of angiotensin-converting enzyme(ACE) inhibitors or blockers of angiotensin receptor (ARBs) in diabetic, hypertensive, or patients suffer from heart failure. This may be explained bythe fact that ACE inhibitors and ARBs drugs enhance ACE2 blockers in epithelial cells lining the lung, where SARS-CoV-2is more likely to infect these cells via ACE2 receptors. Similarly, ACEI and ARBs drugs are shown to interact with several antiretroviral drugs leading to increase viral load. The chloroquine have antagonistic effect with remdesivir which leads to decrease therapeutic activity of remdesivir.

Complication of Diabetes Mellitus

by: د.صابرين علي مزعل

URL link: http://annalsofrscb.ro/index.php/journal/issue/view/27

Description : Diabetes mellitus define as a chronic metabolic disorder ,each ofhyperglycemia and poor control lead to many complication in human body,that complication lead to sever motility or morality in patients. The complication of DM can divided in to main types microvascularthat effected on small vascular in each of retinal peripheral nerve and kidney that lead to retinopathy, neuropathy and nephropathy disease respectively. And macrovascularthat effected on large vascular including Peripheral Artery Disease, Coronary Artery Disease and Cerebrovascular disease.

Extraction and antimicrobial activity of rhamnolipid biosurfactant produced by Pseudomonas aeruginosa UKMP14T

by: د. مروان جواد كاظم مسارة

URL link: DOI: http://dx.doi.org/10.21161/mjm.200758

Description : Aims: Rhamnolipids are seeking utmost attention as a new class of biosurfactants having promising potential in diverse fields as they offer a wide range of advantages over chemically synthesised surfactants. However, the high extraction costs make large scale production face difficulty. In present study, hydrocarbon degrading bacteria Pseudomonas aeruginosa UKMP14T was exploited for its biosurfactant producing ability including a comparative study between different extraction procedures for its recovery. In addition to this, the recovered biosurfactant was explored for its potential application as an antimicrobial agent. Methodology and results: The production of rhamnolipid biosurfactant was confirmed through various detection methods which are drop-collapse test, oil spreading assay, emulsification index, cetyltrimethylammonium bromide (CTAB) assay and hemolytic assay. The test strain P. aeruginosa UKMP14T showed positive results for all the detection assays. Following this, shake flask cultivation was carried out for several time intervals (1, 3, 5, 7 and 9 days) to discover the optimum time for rhamnolipid biosurfactant production. The results were evaluated by quantifying the rhamnolipid yield using Anthrone method and maximum yield was obtained on day 7. Then, three commonly employed rhamnolipid biosurfactant extraction methods (acid precipitation, solvent extraction and zinc sulphate precipitation) were incorporated for the extraction of rhamnolipid biosurfactant. Among these methods, organic solvent extraction (using methanol, chloroform and acetone in 1:1:1 ratio) gave the highest yield (7.37 ± 0.81 g/L) of biosurfactant, followed by zinc sulphate precipitation (5.83 ± 0.02 g/L), whereas acid precipitation gave the lowest yield (2.8 ± 0.12 g/L) and required longer time (30 days). Finally, the antimicrobial activity of several concentrations of rhamnolipid was tested using modified microdilution method and highest antibacterial activity (in the form of percent reduction in growth) of 95.05% and 91.89% was recorded for Escherichia coli ATCC 10536 and Staphylococcus aureus ATCC 11632, respectively, at 100 μg/mL concentration of rhamnolipid biosurfactant. Conclusion, significance and impact of study: The ability of P. aeruginosa UKMP14T in producing rhamnolipid biosurfactant was confirmed. Despite the higher yield obtained by organic solvent extraction method, the recovery technique (involving the separation of solvent system) caused some loss in product. In addition, the transfer and storage of rhamnolipid was challenging using solvent extraction in comparison to acid precipitation and zinc sulphate precipitation. On the other hand, recovery using acid precipitation suffered from lowest yield of rhamnolipid. Therefore, zinc sulphate precipitation is prioritised over the other two methods. Furthermore, the antimicrobial potential of rhamnolipid biosurfactant was tested successfully for as low as 10 μg/mL concentration against E. coli ATCC 10536 and S. aureus ATCC 11632. Therefore, the recovery cost of a high value product like rhamnolipid can be reduced by incorporating the results of this study in the downstream processing and promote rhamnolipid biosurfactant as a potential antimicrobial agent.

Silver nanospheres: Biosynthesis using resurrection plant extract, characterization and in vitro antibacterial activity

by: د. مجيد محمود عبد

URL link: https://doi.org/10.1016/j.matpr.2021.03.177

Description : This work aims to synthesis silver nanoparticles using the extract of resurrection plant as a reducing agent. The resulting product of silver nanoparticles was characterized using XRD and TEM and the results show that there is a pure silver nanoparticles was produced with sphere-like nano silver of 30–50 nm. Furthermore, the as-prepared nanosilver was used as potential anti-bacterial against two Gram positive bacteria; s. aureus and s. epidermidis. The results prove that the as-prepared silver nanosphere is able to inhibit the bacteria growth with maximum inhibition zone diameter of 15 mm (s. aureus) and 20 mm (s. epidermidis) using 160 µg/ml concentration from Ag nanospheres.

Ag(I)-benzisothiazolinone complex: synthesis, characterization, H2 storage ability, nano transformation to different Ag nanostructures and Ag nanoflakes antimicrobial activity

by: د. مصطفى الهيتي

URL link: https://doi.org/10.1088/2053-1591/ab5ab4

Description : A new complex of silver monovalent ions with benzisothiazolinone was reported. This silver coordination polymer was characterized by FTIR, elemental analysis, 1H-NMR and 13C-{1H}-NMR). These measurements show that the bit anion in its silver complex behaves as μ-bridge linking two silver(I) ions as a bidentate ligand through the oxygen and nitrogen atoms. This coordinated polymer was showed non-melting ability, high decomposition and non-solubility in water in addition to all organic solvents except the hot DMSO solvent. Therefore, this polymeric complex had has a high porosity showing thereby that an overall H2 uptake of 5.5 mmol g−1 at 77 K and 10 bar. A new method for the synthesis of a mixture of three different morphological silver nano particles (AgNPs) is reported. The new method includes reduction of the newly prepared silver-benzisothiazolinone complex, [Ag(bit)]n (bit = benzisothiazolinone) with sodium borohydride without using stabilizing agent. The resulting silver nanoparticles Ag NPs were characterized by UV–vis spectra, powder XRD, zeta sizer, zeta potential and scanning electron microscopy (SEM). The results showed that [Ag(bit)]n complex gives three different nano-sized structures spherical, wires and flakes. In order to isolate the larger proportion of the nanostructures, experiments were conducted to control the formation of one form of silver as flakes nanosilver or silver nanowires. The prepared silver nanoparticles were screened for their antibacterial activity against K. pneumonia, P. Aeruginosa, S. aureus and E. coli. Inhibition zone diameter IZD results of 2, 4 and 6 mM Ag NPs was found to be in the range of 7.0–8.4 mm for the selected bacteria.

Novel dithiocarbamate–Hg(II) complexes containing mixed ligands: Synthesis, spectroscopic characterization, and H2 storage capacity

by: د. مصطفى الهيتي

URL link: https://doi.org/10.1002/jccs.201900349

Description : A tetrahedral Hg(II) diethyl dithiocarbamate (Et2Dt) complex containing triphenylphosphine (PPh3) of the composition [HgCl(κ2‐Et2Dt)2(PPh3)] (1) is prepared. Furthermore, complex (1) is used as a synthone to prepare a novel series of complexes of the following composition [Hg(Et2Dt)L(PPh3)] {L = saccharinate (2), thiosaccharinate (3), benzisothiazolinate (4), benzothiozole‐2‐thiolate (5), and benzooxazole‐2‐thiolate (6) anions}. The resulted complexes (1)–(6) are characterized by elemental analysis, molar conductivity, powder X‐ray diffraction, fourier transform Infrared, and NMR (1H and 31P) spectroscopic techniques. The Et2Dt ligand is coordinated as bidentate chelate through the sulfur atoms, whereas the L ligands are bonded as monodentate ligands to afford a tetrahedral geometry around the Hg(II) ion. Nitrogen adsorption–desorption isotherm for two of as‐prepared complexes (2) and (3) are measured first to get their Brunauer–Emmett–Teller surface area. Moreover, the mentioned two complexes are evaluated for their ability to store hydrogen gas at 77 K. However, the results of the hydrogen storage tests proved that the selected complexes are all capable of storing hydrogen, but in varying degrees, where complex (2) exhibited a storage capacity of 4.22 wt% under 88 bar.

Novel Hg(II) and Pd(II) benzotriazole (Hbta) complexes: Synthesis, characterization, X-ray crystal structure of [Pd(PPh3)(μ-bta)Cl]2. DMSO and thermodynamic study of their H2 storage

by: د. مصطفى الهيتي

URL link: https://doi.org/10.1016/j.molstruc.2020.127832

Description : Benzotriazole (Hbta) complexes with Hg(II) and Pd(II) of the types: [Hg(bta)2] (1), [Hg(bta)2(diphos)]; diphos = dppe (2), dppp (3) or dppb (4), [Hg(bta)2(PPh3)2] (5), [Pd(Hbta)2Cl2] (6), [Pd(bta)Cl]2 (7) and [PdCl(bta)(PPh3)]2.DMSO (8) were prepared and characterized by elemental analyses, conductivity measurements, infrared, 1H- and 31P-{1H} NMR spectra. [Pd(PPh3)(μ-bta)Cl]2. DMSO (8) was structurally characterized by single-crystal X-ray diffraction. Structural information exposed that benzotriazole acts as a bidentate bridging ligand bonded through the deprotonated nitrogen and the neutral nitrogen atoms. The hydrogen storage ability of complexes (1–4) was studied after detecting their BET surface area. The results show that complex (1) is able to store 3.35 wt% physically at 77 K under 120 bar.

Poly (o-Phenylenediamine-GO-TiO2) nanocomposite: Modulation, characterization and thermodynamic calculations on its H2 storage capacity

by: د. مصطفى الهيتي

URL link: https://doi.org/10.1016/j.cdc.2020.100450

Description : This work concludes the synthesis and characterization of a new tri-components nanocomposite. All three starting materials (graphene oxide, TiO2, poly (o-phenylenediamine)) were prepared in our laboratory and the results showed that graphene oxide (GO) was present in the form of nanosheets and the titanium oxide (TiO2) gave a rod-like nanostructure (19–30 nm), while the poly (o-phenylenediamine) (PoPDA) showed an irregular nano-sized structure (40–250 nm). The prepared nanocomposite PoPDA-GO-TiO2, synthesized in a bi-step chemical reaction and it was diagnosed using different techniques: FTIR, XRD, TGA, SEM and TEM. These techniques prove the success of the reaction between all three starting materials. The resulting nanocomposite was successfully used for hydrogen uptake capacity and the results prove that PoPDA-GO-TiO2 nanocomposite shows an excellent ability to store the hydrogen gas (5.2 wt% under 85.5771, 129.8900 and 167.9900 bar at 77, 223 and 273 K, respectively. Furthermore, enthalpy and entropy were calculated to be -2.8478 KJ/mol H2 and -14.910 J/mol H2. K, respectively.

Novel Mercury(II) 1-Phenyl-1H-tetrazol-5-thiol and carbon nanotube complexes: synthesis, characterization and H2 storage capacities

by: د. مصطفى الهيتي

URL link: https://doi.org/10.1016/j.cdc.2020.100399

Description : 1-Phenyl-1H-tetrazol-5-thiol (Hptt) has been used to prepare a series of inorganic and organometallic mercury(II) complexes. The prepared complexes were characterized by FTIR, 1H, 13C-{1H} NMR and CHN. The -COOH functionalized carbon nanotubes were used as co-organic nano ligands for preparation of a series of nano supported complexes. The resulted nano supported complexes were characterized by thermal analysis, FTIR, EDX and SEM. Results suggest that the MWCNTs-COOH is coordinated to mercury(II) through the oxygen atom of the carboxylic group in a monodentate fashion and the Hptt linked to mercury(II) through the sulfur atom of the thiolato group in a monodentate fashion. Moreover, after evaluation of their BET surface areas, the hydrogen storage capacities of the prepared nano supported complexes were studied. The measurements showed that the materials had a very high H2 storage capacity reached, 222 g/cm3 at 800 torr and 77 K.

Hydrogen storage capacity of novel mixed ligand complexes of lead(II): Molecular structure of [Pb2(tsac)4(µ-dppe)]

by: د. مصطفى الهيتي

URL link: https://doi.org/10.1016/j.inoche.2021.108444

Description : The complex [Pb(tsac)2H2O] has been used as a synthon for the synthesis of a series of lead(II) thiosaccharinate mixed ligand complexes with the tertiary phosphines; PPh3, Ph2P(CH2)nPPh2, n = 1, dppm; n = 2, dppe; n = 3, dppp or the heterocyclic; 2-aminobenzothiophene (abtH), 2-acetamidopyrimidine (aampH) and 2-benzimidazolethiol (bimsH). The prepared complexes were characterized using; IR, 1H-, 31P-{1H} NMR, molar conductivity, elemental analysis in addition, the crystal structure of the complex [Pb2(tsac)4(µ-dppe)] was resolved by x-ray diffraction analysis of a single crystal. [Pb2(tsac)4(µ-dppe)] crystallizes in the triclinic space group P-1 a = 9.0955(5), b = 11.4197(6), c = 15.3174(7) Å, Z = 2 and refined to R1 = 0.0422. Herein, thiosaccharine shows the ability to coordinate to lead(II) center in a variety of modes, which are monodentate, chelate- bidentate via a nitrogen atom and/ or a sulfur atom of the thiole group. Furthermore, the complexes [Pb(tsac)2H2O] and [Pb2(tsac)4(µ-dppe)] were used to examine their ability to store hydrogen. The results show that [Pb(tsac)2H2O] and [Pb2(tsac)4(µ-dppe)] are able to store 0.29 and 1.12 wt% H2, respectively

Anti-cancer and anti-fungal evaluation of novel palladium(II) 1-phenyl-1H-tetrazol-5-thiol complexes

by: د. مصطفى الهيتي

URL link: https://doi.org/10.1016/j.inoche.2020.108193

Description : The binuclear [Pd2(κ2-ptt)4] (1) and mixed ligand complexes of the type [Pd(κ1-S-ptt)2(κ2-diamine)] (2–4) (Hptt is 1-phenyl-1H-tetrazole-5-thiol), diamine; ethylene diamine (en), 1,10-phenanthroline (Phen) or 2,2′-bipyridyl (Bipy) as co-ligands have been synthesized. The obtained complexes were characterized by elemental analysis, 1H-, 13C-{1H} NMR, molar conductivity, UV–Vis and IR spectroscopy. In complex 1 the ptt anion coordinated as a bridging bidentate via the thione sulfur atom and deprotonated nitrogen atom of the heterocyclic ring to afford a dimeric complex. Whereas in 2–4 the ptt bonded as a monodentate through the thiolato sulfur atom, while the diamine ligands are coordinated as bidentate chelates to afford a square planner arrangement around the Pd(II) center. The anti-fungal activity of the prepared complexes (1–4) was tested against two fungi types (Candida albicans, and Aspergillus niger). All the complexes showed moderate activity compared to standard Fluconazole. Moreover, the anti-cancer activity of complexes (2–4) were examined against ovarian and breast cancer cells. Cell viability assays show that complexes (2–4) are promising anti-tumor in vitro.

Cobalt substitution effect on the physical properties of (Bi, Pb)-2223 superconductor

by: د. منى موسى عباس

URL link: https://iopscience.iop.org/issue/1757-899X/757/1

Description : High-temperature superconductors with a nominal composition Bi2Pb0.3Sr2Ca2Cu3- xCoxO10+δ for (0≤x≤3) were prepared by solid-state reaction method. Effects of the Co substitution on Cu sites have been investigated to obtain the optimum concentration for the formation and stabilization of the superconducting samples. The results of electrical resistivity measurements of the samples showed that increasing x substituting Co enhance the superconducting properties except for the samples with x= 3 yield semiconductor behavior. The higher critical temperature TC found at 118 K, which is for the composition Bi2Pb0.3Sr2Ca2Cu2.2Co0.8O10+δ, which has the highest value of excess oxygen content 0.315. The X-ray diffraction analysis for all superconducting samples showed an orthorhombic structure with two phases, high-Tc 2223 phase and low-TC 2212 phase. X-ray spectroscopy analysis showed that the compositions with x=0.6 and 0.8 samples did not contaminate during the synthesis processes. The scanning electron microscope has been used to identify the morphology of the superconducting phase. The plate-like grains of the high Bi- 2223 phase appeared in most micrographs of the superconducting samples besides changes morphology of samples with increasing dopant concentration.

Effect of sintering temperature on superconducting properties of Bi2 Pb2 Sr2 Ca2 Cu3-xCox O10+δ system

by: د. منى موسى عباس

URL link: https://iopscience.iop.org/issue/1757-899X/757/1

Description : Bi2Pb0.3Sr2Ca2Cu3-xCoxO10+δ high temperature superconductors with x=0, 0.2 and 0.4 were prepared by a solid state reaction method. The samples properties have been investigated structurally by X-ray diffraction and morphologically by scanning electron microscopy. Structural analysis showed that two superconducting phases coexist in the samples high temperature Bi-2223 and low-temperature phase 2212 with orthorhombic structure for all samples. Four point probe method was used to study the electrical properties of the samples and all of them showed superconductivity behavior. The transition temperature increases with the increasing Co concentration and sintering temperature. Bi2Pb0.3Sr2Ca2Cu3-xCoxO10+δ superconductor sintered at 130 0 C shows highest critical temperature 114 K.

The Role of Chemical Substitutions on Bi-2212 Superconductors

by: د. منى موسى عباس

URL link: https://doi.org/10.3390/cryst10060462

Description : We present a study on the correlation of the superconducting critical temperature (Tc) and structural morphology with a chemically substituted high-temperature superconductor (HTS) (Bi,Pb)-2212 via Powder X-ray Diffraction (PXRD), Scanning Electron Microscopy (SEM), Energy Dispersive X-ray Spectroscopy (EDX), and dc magnetometry. The elements Zn, Y, Ti, and Nd are incorporated within the bismuth cuprate structure at amounts that extend the ranges currently found in literature.

Assessment of ZnO Nanoparticles effect on peroxidase activity in serum of patients with type 2 Diabetes millets: in Vitro study

by: د. صابرين لي مزعل

URL link: https://www.researchgate.net/publication/333089173_Assessment_of_ZnO_Nanoparticles_Effect_on_Peroxidase_Activity_in_Serum_of_Patients_with_Type2_Diabetes_Millets_in_vitro_study

Description : Nanoparticle applications have been improved in different areas of sciences, among these are the medicalapplications. In did , the estimation of their effects in this field can be evaluated via studying of their effects on therelevant biochemical functions of the investigated disease. The aim of this study is to estimate the effect of ZnOnanoparticles on peroxidase activity in serum of patients withType2Diabetes Millets.Serum samples of30 patients,aged (40-60) years, withtype2diabetesmillets were collected as a patients group. Control group included 20 sampleswere obtained from 20 healthy subjects, aged (40-60). Nanoparticles of ZnO were used in thisstudy in a diameterless than 80 nm. Serum peroxidase activity of the studied groups was estimated in absence and presence of ZnONanoparticles by colorimetric method.The obtained results in this study were showed that the activity of serumperoxidasein presence of ZnO NPs in patients group was lower than its activity in this group without ZnO NPs. atthe same time, both its activities in patients group (with and without ZnO NPs) were found to belowerthan itsactivity in control group.This study show decreasing of serum peroxidase activity in presence of ZnO NPs. thiseffect may be due to the biological activity of this type of NPs in addition to the conformational changes that can beoccurred on the protein structure

Clinical investigation of post blepharoplasty adjuvant carbon dioxide laser resurfacing

by: دكتور محمد عبود المالكي

URL link: https://www.jpad.com.pk/index.php/jpad/article/view/1376

Description : Aging is continuous process that affects negatively people social activities. Aesthetic procedures can bring confidence, happiness and improves social relationships. The goal of this study is the evaluation the eyelid skin tightening after the post blepharoplasty adjuvant CO2 laser carried out at one month after the surgery. Methods Eleven patients with age range of 34 to 57 years were treated by blepharoplasty surgery followed by laser resurfacing after one month of the surgery. The first session of laser irradiation were carried out under topical anesthesia at one month from the day of surgery. The degree of wrinkles of both upper and lower eyelids was measured by Image J V 1.51K computer software for the recorded photographs both before and at one month after treatment. Results Descriptive results of the treatment before and after CO2 laser irradiation were 125.53 (±2.17) and 115.13 (±14.55) pixels, respectively. The Wilcoxon Signed Ranks statistical test showed a significant difference between the before and after treatment wrinkles reduction, p=0.016. Conclusion Adding the CO2 laser as assisted tool for this procedure has led to synergistic effect for eyelid skin tightening by 8.3%.

Detection and Molecular Identification of Pseudomonas aeruginosa Virulence Gene (Tox A, Exo S And Exo U Genes) by Using PCR in Babylon Province

by: د. سارة عادل عبيد

URL link: https://connectjournals.com/03896.2020.20.3455

Description : In the presen tstudy, including collecting and processing 100 clinical samples from different clinical cases. The identification of Pseudomonas aeruginosa by conventional technique through using cultural and biochemical features. Only (40) isolates have been recovered from P. aeruginosa, where 8 isolates (20%) obtained from otitis media, 10 isolates (25%) from burns samples, 9 isolates (22.5%) from wounds, 6 isolates (15%) from blood samples and 7 (17.5%) isolates recovered from urine. The result from PCR molecular study revealed that the toxA gene was present only from 28 (70%) isolates gave positive results for P. aeruginosa isolates, since it investigated from only 6 isolate of otitis media (75%) has toxA gene, 8 isolate ( 80%) from burns followed by 7 isolate (77.7%) from wounds infection, 3 isolate (50%) from blood and finally 4 isolate (57%) from urine has this gene. On the other hand, the results from exoS gene recovered only from 27 isolates (67.5%), including5 isolates (62.5%) from otitis media, 7 isolates (70%) from burns, 6 isolates (66.6%) from wounds, 3 isolates ( 50%) from blood and 6 (85.7%) from urine. While the results from exoU gene shown that this gene presence only from 32 isolates (80%) offer positive results from P. aeruginosa isolates that including 7 isolate ( 21.8%) from otitis media, 8 isolate (25%) from burns followed by 7 isolate (21.8%) from wounds infection, 3 isolate (9.3%) from blood and finally 7 isolate (21.8%) from urine has this gene.

Isolation and Characterisation of Thermophilic Bacillus licheniformis SUNGC2 as Producer of α-Amylase from Malaysian Hot Spring

by: د. مروان جواد كاظم مسارة

URL link: DOI: https://doi.org/10.47836/pjst.28.s2.10

Description : Screening of new source of novel and industrially useful enzymes is a key research pursuit in enzyme biotechnology. The study aims to report the characteristics of novel thermophilic microorganisms isolated from Sungai Klah (SK) Hot Spring, Perak, Malaysia, that can produce α-amylase. The morphological and biochemical properties were examined for SUNGC2 sample. The isolate was further screened for amylase, followed by 16S rRNA and analytical profile index (API) test. This isolate was further subjected to pH optimisation for α-amylase production. It was found that SUNGC2 was an α-amylase producer and was identified as Bacillus licheniformis SUNGC2 with NCBI accession numbers MH062901. The enzyme was found to exhibit an optimum temperature of 50°C and a pH of 7.0. The relative activity of the enzyme was obtained based on the improvement of the culture conditions. The highest amount of amylase production was 24.65 U/mL at pH 7.0, consecutively the growth was also highest at pH 7.0 with a 9.45-fold increase in specific activity by ammonium phosphate precipitation of 80% (w/v). The results showed that the bacteria isolated from the hot spring are a significant source of thermophilic enzymes that are highly promising in biotechnology.

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