162 research outputs found

    The Effective M3Y Residual Interaction In 41Ca As a Nuclear Diffraction Grating of Electrons

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    تمت تحقيق عوامل التشكل للاستطارة الالكترونية المغناطيسية المرنة متعددة الاقطاب الكلية والمنفردة  لنظير 41Ca باستخدام أنموذج القشرة النووية الناجح و الواسع التطبيق واعتبار الغلاف 1f7/2 كأنموذج فضاء واعتماد التفاعلF7MBZ    كتفاعل مؤثر لتشكيل دوال موجة انموذج الفضاء. اعتمدت دالة المتذبذب التوافقي كدالة جسيم منفرد , كما تم اعتماد نواة 40Ca كقلب خامل حيث يتم استقطابه واشراكه في حسابات عوامل التشكل المغناطسية المرنة من خلال عملية استقطاب القلب حيث يتم خلع نيوكليون من مدارات القلب الخامل وتهييجه الى مستويات عليا وبفرق طاقة 2ћω وكما تم الاعتماد على التفاعل الواقعي (effective M3Y P2) في حسابات استقطاب القلب والذي يفاعل الزوج( جسيم –فجوة ) ان هذا التفاعل هو نموذج مطور حديثا للتفاعل الاصلي واخيرا تم مقارنة النتائج النظرية مع ما هو متوفر من نتائج عملية.The total and individual multipole moments of  magnetic electron scattering form factors in 41Ca  have been investigated using a widely successful model which is the nuclear shell model configurations keeping in mind of 1f7/2 subshell as an L-S shell and Millinar, Baymann, Zamick as L-S shell (F7MBZ) to give the model space  wave vector. Also, harmonic oscillator wave functions have been used as wave function of a single particle in 1f7/2  shell. Nucleus 40Ca as core closed and Core polarization effects have been used as a corrective with first order correction concept to basic computation of L-S shell and the excitement energy has been implemented with 2ћω. The core polarizability effect has been utilized to incorporate the rejected space (core + higher arrangement) via L-S shell with a realism interaction of effective M3Y P2 interaction to connect the model space particles in motion with the spouse (p-h). The two body M3Y interactions have been utilized as an interaction residue to calculate the core polarizability matrix elements. Finally, the theoretical result of the form factor has been compared with the experimental results

    Evaluation of the behavior of tanks under seismic load

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    The unstable reaction of structures could be influenced by evaluating the behavior of tanks under seismic loads using research of soil-structure interaction. Because fluid limit tanks are important structures that can continue to function even in the face of severe earthquakes, their unstable behavior should be examined. Similarly, under unstable tremor ground upgrades, the unstable reaction of liquid limit tanks placed on 0.5 area soil is investigated. To improve correlation, the six considered ground enhancements are divided into bundles based on their beat like properties, dubbed turn off and shut accuse ground enhancements. The acquired ground mass-spring represent is used to signal up the liquid limit tanks, and the liquid is displayed as lumped lots termed sloshing and flying, and furthermore exploiting paired springs and dashpots is how the fluid and structure are linked. Using a connected spring and dashpot, the impact of Soil Structure Interaction is also considered. Aside from that, four soil types are commonly used to identify a wide range of soil attributes. To date, the mat lab writing computer programs has been used to invigorate the time history reactions in the aftermath of social gathering the stages of development. Due to its significant heap, the sloshing (or convective) voidance is not troubled by such effects, even though the Soil Structure Interaction influence causes a reduction in rush relocation, falling small and standardized base shear

    ASSESSMENT OF THE GENOTOXIC AND MUTAGENIC EFFECT OF AL-TAIF POMEGRANATE (PUNICA GRANATUM L) PEEL EXTRACT ALONE AND COMBINED WITH MALATHION AND ATRAZINE PESTICIDES IN LIVER OF MALE ALBINO MICE

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    ABSTRACTIn our previous studies, we report the antioxidant, hepatoprotective and nephroprotective potential of of Al-Taif Pomegranate (Punica granatum L)extracts against toxicity induced by Malathion (Mal) and Atrazine (Atra) pesticides in male albino mice. Hereby, we assess the genotoxic and mutagenicpotential of Al-Taif Pomegranate (P. granatum L) peel extract (PPE) alone and combined with Atra and Mal pesticides in the liver of male albino mice.Our results report PPE genotoxicity and its failure to significantly decrease the genotoxic effect of the pesticides Mal and Atra. Genotoxic potential wasreported by using Comet assay, in which fifty isolated comets were randomly selected and used to measure tail length, % DNA of tail and tail momentfor each group in comparison with the negative control group. Moreover, PPE combined (Mal and Atra) groups show DNA point of mutation in P53exon 5, that was detected by the highly sensitive and accurate assay single-strand conformation polymorphism (SSCP), represented by an extra thirdband in comparison with the negative control group. This mutation was not detected by direct sequencing, means that it is a low-frequency mutation.In conclusion, our results report Al-Taif PPE as a genotoxic extract and mutagenic in combination with Mal and Atra pesticides. Moreover, the presentresults also confirm the sensitivity of SSCP technique in detection of point of mutation in comparison to direct sequencing.Keywords: Malathion, Atrazine, Pomegranate peel extract, Mutagenic, Genotoxic

    EVALUATION OF THE ANTIOXIDANT POTENTIAL FOR DIFFERENT EXTRACTS OF AL-TAIF POMEGRANATE (PUNICA GRANATUM L) INDUCED BY ATRAZINE AND MALATHION PESTICIDES IN LIVER OF MALE ALBINO MICE

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    Objective: The objective of the present study was to evaluate the antioxidant potential of Al-Taif Pomegranate Peel extract (PPE) and juice (PJ) induced by atrazine (Atra) and malathion (Mal) toxicity in male mice by using biochemical and histopathological assays.Methods: Male mice were divided into ten groups and treated orally as following: Negative control; Mal group (27 mg/kg); Atra group (120 mg/kg); PPE group (0.4 g/Kg); PJ group (0.4 g/Kg);Mal + PPE group (27 mg/Kg + 0.4 g/Kg, respectively); Mal + PJ group (27mg/Kg + 0.4 g/Kg, respectively); Atra + PPE group (120mg/Kg + 0.4 g/Kg, respectively); Atra + PJ group (120mg/Kg + 0.4 g/Kg, respectively); Mal + Atra + PPE + PJ combined co-administration group.Results: Biochemical results showed a significant decrease in the antioxidant enzyme levels represented by SOD, GPxand CAT for Mal or Atra groups, while they afforded a highly significant increase in lipid peroxidation end product, MDA level. In contrast, co-administration of PPE and/or PJ and Atra and/or Mal-treated groups restored almost most of these antioxidant defense capacities to normal levels. On the other hand, treatmentwith eitherAtra or Mal resulted in histopathological hepatic alterations. However, co-administration of PPEand/or PJ and Atra and/or Mal-treated animals improved the hepatic damage and alleviated pesticides toxic effect.Conclusion: The present study suggested that Atra and Mal exposure lead to oxidative damage in the liver tissues of mice and concomitant treatment with different extracts of Al-Taif Pomegranate protected the liver tissues from oxidative damage.Â

    Development of hand-arm model rig for tremor excitation

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    This paper describes the development of a handarm model rig to simulate human tremor behaviour. The experimental rig is designed as an apparatus to induce vibration along a hand-arm model. An Intra Vernacular (IV) Training arm is used as the handarm model. Displacement and acceleration behaviour at three selected points along the handarm model were recorded by mean of piezoelectric accelerometer. The data from the experiment can be used for further analysis of the human hand-arm tremor especially for Parkinson's disease (PD) patients. Results from the experiments are raw data which can later be used in designing an appropriate instrument that can suppress the hand tremor

    Antimicrobial activity of extracts of Vernonia amygdalina leaves from cultivated mother plants and progeny

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    The antimicrobial activity of Vernonia amygdalina chloroform (CHCl3) and methanol (MeOH) leaves extracts were assayed against standard microorganisms. Two Gram positive bacteria (Bacillus subtilis and Staphylococcus aureus), and one Gram negative (Pseudomonas aeruginosa) and two fungi (Aspergillus niger and Candida albicans). The leaves were harvested from mother plants and atissue culture raised progeny growing at the experimental area of Medicinal and Aromatic Plants and Traditional Medicine Research Institute. Discdiffusion method was used for determination of the inhibition zone as indicator of the antimicrobial activity. The extracts from V. amygdalina exhibited varying degrees of inhibition activity against the studied bacteria and fungi. The highest value of inhibition (30 mm) obtained was on Staphylococcus aureus using CHCl3 extract, while the lowest activity was found in the MeOH extract of the Mother plants on tested organisms, comparison with the same extract of progeny. B. subtilis and S. aureus were highly susceptible to theCHCl3 extracts of both mother plant and progeny, but P. aeruginosa was less sensitive to all different types of the studied extracts.Both types of extracts (CHCl3 and MeOH) of the leaves from mother plants showed low to moderate activity against both fungi (A. niger, C. albicans) compared to the extracts from progeny. From this study it appears that the leaves extracts from V. amygdalina, either frommother plants or progeny had a comparable antimicrobial efficiency, which gives opportunities to propagation and commercial production of this multipurpose plant in Sudan. This result also suggested that V. amygdalinamay have individual components that can be used as antibacterial and antifungal.

    Soft Soil Treated with Waste Fluid Catalytic Cracking as a Sustainable Stabilizer Material

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    This research aims to stabilize clayey soil utilizing fluid catalytic cracking with an unchangeable ordinary portland cement ratio of 3 percent. A soft clayey soil was blended with 1.5, 3, 4.5, and 6 percent of fluid catalytic cracking by the dry stabilized soil weight, the ordinary portland cement amount has been fixed at 3 percent. The adding of different FCC ratios impact cement stabilized soil evaluated based on the results of unconfined-compressive-strengths test that gained after curing for 7 and 28 days. It was noticeable from the results that the best combination is the combination of soil remedied with 3 percent of each cement and FCC in improving the compressive strengths from 249.80 to 806.20k Pa for the stabilized soil after curing for 28 days. The most highlighting soil binder combination was analyzed utilizing scanning electron microscopy. It was noticed from the scanning electron microscopy results; cementitious materials were produced after 7 days of curing and improved more after curing for eight days

    Impurity effects on the melting of Ni clusters

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    We demonstrate that the addition of a single carbon impurity leads to significant changes in the thermodynamic properties of Ni clusters consisting of more than a hundred atoms. The magnitude of the change induced is dependent upon the parameters of the Ni-C interaction. Hence, thermodynamic properties of Ni clusters can be effectively tuned by the addition of an impurity of a particular type. We also show that the presence of a carbon impurity considerably changes the mobility and diffusion of atoms in the Ni cluster at temperatures close to its melting point. The calculated diffusion coefficients of the carbon impurity in the Ni cluster can be used for a reliable estimate of the growth rate of carbon nanotubes.Comment: 27 pages, 13 figure

    Analysis of Optimal Motion Performance for Underactuated Gantry Crane System using MOPSO with Linear Weight Summation Approach

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    This paper present the development of Multi-Objective Particle Swarm Optimization (MOPSO) with Linear Weight Summation (LWS) approach to enhance the effectiveness and efficiency of Gantry Crane System (GCS). The purpose of using LWS is to control the desired trolley position and payload oscillation according to the Settling Time (Ts), Steady State Error (SSE) and Overshoot (OS). The effectiveness of variation in weight summation is observed to find the optimal motion performances of the system. It demonstrated that GCS is able to achieve the goals while able to move the trolley as fast as possible to the desired position with low payload oscillation. Through this approach, the best optimal motion performances can be achieved by setting similar value of weightage for OS and Ts and reduce the priority for SSE

    Antimicrobial resistance among migrants in Europe: a systematic review and meta-analysis

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    BACKGROUND: Rates of antimicrobial resistance (AMR) are rising globally and there is concern that increased migration is contributing to the burden of antibiotic resistance in Europe. However, the effect of migration on the burden of AMR in Europe has not yet been comprehensively examined. Therefore, we did a systematic review and meta-analysis to identify and synthesise data for AMR carriage or infection in migrants to Europe to examine differences in patterns of AMR across migrant groups and in different settings. METHODS: For this systematic review and meta-analysis, we searched MEDLINE, Embase, PubMed, and Scopus with no language restrictions from Jan 1, 2000, to Jan 18, 2017, for primary data from observational studies reporting antibacterial resistance in common bacterial pathogens among migrants to 21 European Union-15 and European Economic Area countries. To be eligible for inclusion, studies had to report data on carriage or infection with laboratory-confirmed antibiotic-resistant organisms in migrant populations. We extracted data from eligible studies and assessed quality using piloted, standardised forms. We did not examine drug resistance in tuberculosis and excluded articles solely reporting on this parameter. We also excluded articles in which migrant status was determined by ethnicity, country of birth of participants' parents, or was not defined, and articles in which data were not disaggregated by migrant status. Outcomes were carriage of or infection with antibiotic-resistant organisms. We used random-effects models to calculate the pooled prevalence of each outcome. The study protocol is registered with PROSPERO, number CRD42016043681. FINDINGS: We identified 2274 articles, of which 23 observational studies reporting on antibiotic resistance in 2319 migrants were included. The pooled prevalence of any AMR carriage or AMR infection in migrants was 25·4% (95% CI 19·1-31·8; I2 =98%), including meticillin-resistant Staphylococcus aureus (7·8%, 4·8-10·7; I2 =92%) and antibiotic-resistant Gram-negative bacteria (27·2%, 17·6-36·8; I2 =94%). The pooled prevalence of any AMR carriage or infection was higher in refugees and asylum seekers (33·0%, 18·3-47·6; I2 =98%) than in other migrant groups (6·6%, 1·8-11·3; I2 =92%). The pooled prevalence of antibiotic-resistant organisms was slightly higher in high-migrant community settings (33·1%, 11·1-55·1; I2 =96%) than in migrants in hospitals (24·3%, 16·1-32·6; I2 =98%). We did not find evidence of high rates of transmission of AMR from migrant to host populations. INTERPRETATION: Migrants are exposed to conditions favouring the emergence of drug resistance during transit and in host countries in Europe. Increased antibiotic resistance among refugees and asylum seekers and in high-migrant community settings (such as refugee camps and detention facilities) highlights the need for improved living conditions, access to health care, and initiatives to facilitate detection of and appropriate high-quality treatment for antibiotic-resistant infections during transit and in host countries. Protocols for the prevention and control of infection and for antibiotic surveillance need to be integrated in all aspects of health care, which should be accessible for all migrant groups, and should target determinants of AMR before, during, and after migration. FUNDING: UK National Institute for Health Research Imperial Biomedical Research Centre, Imperial College Healthcare Charity, the Wellcome Trust, and UK National Institute for Health Research Health Protection Research Unit in Healthcare-associated Infections and Antimictobial Resistance at Imperial College London
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