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Amal G. Ramadan(Amal G. Ramadan ),Ahmed A. M. Yassein(Ahmed A. M. Yassein ),Eissa A. Eissa(Eissa A. Eissa ),Gamal M. Hassan(Gamal M. Hassan ) 한국축산식품학회 2022 Food and Life Vol.2022 No.3
Zinc oxide nanoparticles (ZnO-NPs) are regularly utilized in the food and fertilizers industries. In our investigation, rats received oral administration of ZnO NPs with a particle size of 30±5 nm once daily at doses of 100, 200, 300, 400, and 600 mg/kg for ten weeks in order to assess the genotoxic effect. Impacts on hematological markers, genotoxic impact, and growth were investigated. The findings showed that ZnO-NPs significantly reduced body weight gain, red blood cell count (RBC), hemoglobin concentration (Hb), hematocrit value (HCT), and platelet count (PLT), while increasing white blood cell (WBC), mean capsular volume (MCV), mean capsular hemoglobin (MCH), and mean capsular hemoglobin concentration (MCHC) in the treated rats. Our results for the comet assay and micronuclei test show a dosage-dependent increase in DNA fragmentation, which was supported by an increase in the percentage of DNA that is tailed, the length and intensity of DNA tails, and the tail moment, especially at the dose of 600 mg/kg. According to the findings, the frequency of micronucleated cells has increased.
Assessment of the macroalgal diversity of Kuwait by using the Germling Emergence Method
Amal H. Hajiya Hasan,Dhia A. Al-Bader,Steve Woodward,Csongor Z. Antony,Jared Kok Ong,Akira F. Peters,Frithjof C. Kupper The Korean Society of Phycology 2023 ALGAE Vol.38 No.2
Cryptic stages of diverse macroalgae present in natural substrata, "the bank of microscopic forms", were isolated into clonal cultures and identified based on both morphological characteristics and DNA barcoding. Approximately 120 clonal isolates from 308 natural substratum samples were collected from the entire coastline of Kuwait. Amongst these isolates, 77 (64%) were identified through DNA barcoding using the nuclear ribosomal small subunit, RuBisCO spacer (ITS2, tufa, rbcL, psaA, and psbA) and sequencing. Twenty-six isolates (34%) were identified in the division Chlorophyta, 18 (23%) as Phaeophyceae, and 33 (43%) as Rhodophyta. For all DNA sequences in this study, species-level cut off applied was ≥98% homology which depend entirely on the markers used. Three putative new records of Chlorophyta new for the Arabian Gulf were made: Cladophora laetevirens (Dillwyn) Kützing, Ulva torta (Mertens) Trevisan and Ulvella leptochaete (Huber) R. Nielsen, C. J. O'Kelly & B. Wysor in Nielsen, while Cladophora gracilis Kützing and Ulva ohnoi M. Hiraoka & S. Shimada are new records for Kuwait. For Phaeophyceae, Ectocarpus subulatus Kützing and Elachista stellaris Areschoug were new records for the Gulf and Kuwait. In the Rhodophyta, Acrochaetium secundatum (Lyngbye) Nägeli in Nägeli & Cramer, Ceramium affine Setchell & N. L. Gardner, Gelidium pusillum var. pakistanicum Afaq-Husain & Shameel and Dasya caraibica Børgesen are new records for the Gulf and Kuwait, while the red alga Stylonema alsidii (Zanardini) K. Drew is a new record for Kuwait. Several isolates identified corresponded to genera not previously reported in Kuwait and / or the Arabian Gulf, such as Porphyrostromium Trevisan, a new genus from the Bangiales, and two unidentified species for the Planophilaceae Škaloud & Leliaert. The isolates cultivated from substrata enhance understanding of the marine macroalgal diversity in the region and confirmed that the Germling Emergence Method is suitable for determining the actual diversity of a given study area through isolation from cryptic life-history phases.
FRENCH DIRECT INVESTMENT IN AUSTRALIA: AN APPLICATION OF DUNNING'S ECLECTIC PARADIGM
Amale Scally,Peter J Pope People&Global Business Association 1998 Global Business and Finance Review Vol.3 No.2
This study has its foundation in Dunning's 'eclectic paradigm' which states that multinationals face a set of three interrelated determinants. These are Ownership-specific advantage, Internalisation-specific advantages and Location-specific advantage (OLI hereafter). This theory is applied to the case of French multinational activity in Australia. An examination of the motives underlying such investments is also included. Results indicate that to a certain extent ownership advantages of French enterprises, their internalisation incentives and the locational advantages of Australia provide valid explanations for the existence of French direct investment in Australia. However, each determinant on its own is a necessary condition for direct investment to occur, but not a sufficient one. The majority of French multinationals surveyed seem to be market-seeking investors, possessing ownership advantages in the form of high quality products or services, marketing and managerial skill as well as superior technology. The Australian market is of interest to French enterprises as it is strategically located in a region characterised by strong economic growth. But it is the great distance which separates Australia and France, and the need to ensure that the ownership advantages (quality and technology) are preserved which encourage French multinationals to invest in Australia rather than to export, license or franchise.
Amal F Alshammary,Imran Ali Khan 대한비만학회 2021 The Korean journal of obesity Vol.30 No.1
Background: Consanguinity, defined as a blood relation between couples, is associated with genetic diseases in their offspring. In Saudi Arabia, obesity is considered a major health problem associated with increased risks of cardiovascular disease, insulin resistance, and type 2 diabetes mellitus. Angiotensin-converting enzyme (ACE) with insertion (I) and deletion (D) polymorphisms of an Alu-287 bp sequence has been implicated in multiple metabolic disorders, including obesity. To date, no studies have been conducted in the Saudi population regarding the ACE gene in consanguineous offspring with obesity. Therefore, the present study aimed to investigate genetic associations in offspring of first cousins, and specifically the relationship between obesity and ACE (Alu-287 bp) was evaluated in the Saudi population. Methods: In total, 91 cases of obesity in the offspring of first-cousin couples and 100 control subjects without obesity but with a family history of consanguinity were included. Using genomic DNA, ACE ID polymorphisms between the cases and controls were evaluated by polymerase chain reaction. Results: There were strong differences in the height, weight, and body mass index between the cases and controls (P<0.001). A genotype analysis confirmed the strong association with allele frequencies (P<0.001; odds ratio, 4.902; 95% confidence interval, 2.867–8.379) when compared between the cases and controls. One-way analysis of variance showed a positive correlation with height and logistic regression (covariance) that could not be strongly correlated (P>0.05). Conclusion: In conclusion, the ACE gene polymorphism was found, through allele frequencies, to be associated with obesity in the offspring of consanguineous first cousins in the Saudi population.
Amal Mohamad Yanuar,Chen Shyh-Jye 아시아심장혈관영상의학회 2021 Cardiovascular Imaging Asia Vol.5 No.4
A partial pulmonary artery sling in bronchopulmonary situs inversus with association of congenital distal trachea stenosis is an extremely rare vascular developmental anomaly. Understanding of this unusual anomaly requires deep knowledge of pulmonary arterial embryogenesis. We present an asymptomatic pediatric female after a one-stage operation for Taussig- Bing anomaly and coarctation of the aorta. Contrast-enhanced cardiac CT examination clearly demonstrated partial sling of the pulmonary artery from the right hemithorax and running a course behind the carina and in front of the esophagus before heading to the left hemithorax. Congenital distal trachea stenosis should specifically be evaluated due to strong association with complete cartilaginous rings in majority cases.
Amal T. Abou Elghait,Tarek. M. Mostafa,Fatma K. Gameaa,Gamal K. Mohammed,Fatma Y. Meligy,Manal M. Sayed 대한해부학회 2022 Anatomy & Cell Biology Vol.55 No.3
As a synthetic analog of codeine, tramadol is often prescribed to treat mild to moderate pains. This study was designed to estimate and compare the histological effect of tramadol on testes of both juvenile and adult male albino mice. A total number of 40 healthy male albino mice were classified into two main groups as follows: group I (juvenile group, includes 20 mice aged three weeks) subdivided equally into group Ia (control group received isotonic saline) and group Ib (tramadol-treated group received 40 mg/kg/d tramadol orally for 30 days); group II (adult group, includes 20 mice aged two months) subdivided equally into group IIa (control group received isotonic saline) and group IIb (tramadol-treated group). Juvenile and adult tramadol-treated groups showed numerous testicular changes, including blood vessels congestion, widening of intercellular spaces, vacuolization in interstitial tissues, luminal germ cells exfoliation, and increased expression of caspase-3 that indicated cellular apoptosis. In the ultrastructural examination, spermatogenic cells degenerated with the frequent appearance of apoptotic cells. Sertoli cells showed vacuolations, large lipid droplets, and disrupted intercellular cell junctions. These observed testicular changes were markedly observed in the juvenile group. Testicular abnormalities and apoptotic changes can be caused by tramadol administration. These abnormalities are more common in juvenile mice.
Amal Elawady,Haitham Aboshosha,Ashraf El Damatty 한국풍공학회 2018 Wind and Structures, An International Journal (WAS Vol.27 No.2
At the University of Western Ontario (UWO), numerical tools represented in semi-closed form solution for the conductors and finite element modeling of the lattice tower were developed and utilized significantly to assess the behavior of transmission lines under downburst wind fields. Although these tools were validated against other finite element analyses, it is essential to validate the findings of those tools using experimental data. This paper reports the first aeroelastic test for a multi-span transmission line under simulated downburst. The test has been conducted at the three-dimensional wind testing facility, the WindEEE dome, located at the UWO. The experiment considers various downburst locations with respect to the transmission line system. Responses obtained from the experiment are analyzed in the current study to identify the critical downburst locations causing maximum internal forces in the structure (i.e., potential failure modes), which are compared with the failure modes obtained from the numerical tools. In addition, a quantitative comparison between the measured critical responses obtained from the experiment with critical responses obtained from the numerical tools is also conducted. The study shows a very good agreement between the critical configurations of the downburst obtained from the experiment compared to those predicted previously by different numerical studies. In addition, the structural responses obtained from the experiment and those obtained from the numerical tools are in a good agreement where a maximum difference of 16% is found for the mean responses and 25% for the peak responses.