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Wyszukujesz frazę "AbdulRahman, A." wg kryterium: Autor


Wyświetlanie 1-10 z 10
Tytuł:
An empirical evaluation of exchange rates changes: economic implications in oil-exporting countries
Empiryczna ocena zmian stopy wymiany walut i ich ekonomicznych implikacji w krajach eksportujących ropę naftową
Autorzy:
AbdulRahman, A.
Powiązania:
https://bibliotekanauki.pl/articles/2051471.pdf
Data publikacji:
2019
Wydawca:
Akademia Bialska Nauk Stosowanych im. Jana Pawła II w Białej Podlaskiej
Tematy:
exchange rate
spot exchange rate
fixed exchange rate
inflation rate
Opis:
Subject and purpose of work: This paper examines empirical implications of exchange rates in the economy of the Kingdom of Saudi Arabia (KSA). In particular, it aims to identify and evaluate potential macroeconomic signs and symptoms of economic disturbance so as to determine macroeconomic variables that influence spot exchange rate (1GBP = SAR), and to examine how fixed exchange rate regime influences exports and imports in the Kingdom of Saudi Arabia (KSA). Materials and methods: Multiple regression and simple linear regression models were used to analyze the data from 1975 to 2018. Results: The study found a weak and insignificant relationship between spot exchange rate and unemployment rate, inflation rate, exports, and economic growth, along with strong relations with imports, investment, and current account variation in the KSA. Conclusions: The study recommends the adoption of a floating exchange rate regime in the KSA. It has revealed the signs and symptoms of increases of the inflation rate with decreasing exports, increasing imports, decreasing of current account (current account deficit threat), and small increases of investment.
Przedmiot i cel pracy: W artykule przeprowadzono ocenę empiryczną implikacji zmian stopy wymiany walut w gospodarce Królestwa Arabii Saudyjskiej. Szczególnym celem artykułu jest identyfikacja i ocena potencjalnych sygnałów i symptomów makroekonomicznych zakłóceń w gospodarce i określenie makroekonomicznych zmiennych, które wpływają na stopę wymiany funta brytyjskiego na jednostkę waluty krajowej (1 GBP=SAR), a także dokonanie oceny w jakim stopniu system wymiany walut wpływa na rozmiary eksportu i importu Królestwa Arabii Saudyjskiej. Materiały i metody: W pracy zastosowano statystyczne modele regresji liniowej i metody regresji wielorakiej przy wykorzystaniu danych liczbowych za okres 1975-2018. Wyniki: W badaniach ujawniono słabe i mało znaczące powiązania między stopą wymiany waluty krajowej na waluty zagraniczne a stopą bezrobocia, stopą inflacji, wielkością eksportu, wzrostem ekonomicznym oraz silne relacje stopy wymiany walut na rozmiary importu, inwestycje oraz zmiany w bilansie obrotów bieżących Królestwa Arabii Saudyjskiej. Wnioski: Badania rekomendują stosowanie systemu zmiennej stopy wymiany walut w Królestwie Arabii Saudyjskiej. W wyniku badań zaewidencjonowano powiązane ze stopą wymiany walut sygnały i symptomy, takie jak: wzrost stopy inflacji, spadek eksportu, wzrost importu oraz powiększenie deficytu obrotów bieżących, a także spowolnienie procesów inwestycyjnych. Autorzy rekomendują wprowadzenie w Królestwie Arabii Saudyjskiej zmiennej stopy wymiany waluty krajowej wobec walut zagranicznych.
Źródło:
Economic and Regional Studies; 2019, 12, 2; 111-126
2083-3725
2451-182X
Pojawia się w:
Economic and Regional Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative Testing of Multibioagent Inoculants to Control Bipolaris spicifera R15 on Rice Plant
Autorzy:
Ali, Hamdia Z.
Abdulrahman, Abdulrahman A.
Abdullah, Ali A.
Saood, Hutham M.
Powiązania:
https://bibliotekanauki.pl/articles/2027993.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
Cladosporium halotolerans
Meyerozyma guilliermondii
multibiocontrol agent
Opis:
The present research deals with greenhouse studies on the efficacy of Cladosporium halotolerans CIR 18_ITS and Meyerozyma guilliermondii MIR 15_ITS compared with a compatible Trichoderma isolate T.4679 to control the phytopathogenic Bipolaris spicifera R15 fungus. An experiment was carried out under controlled conditions in a greenhouse with sterilised soil, and 13 parameters were evaluated. The greenhouse results triggered significant differences [p<0.05] on rice plants after two-month post planting in all treatments compared with the untreated control due to pre-inoculation with three multibiocontrol agents. In addition, results showed the significant interaction amongst three multibiocontrol agents on the growth parameters of the rice plant, fresh weight of shoot and root, dry weight of shoot, root, shoot and root length and greater efficiency of reducing disease severity when treated with the Trichoderma isolate T.4679, M. guilliermondii MIR 15_ITS and C. halotolerans CIR 18_ITS individually or in combination with each other. The greenhouse experiment exhibited that C. halotolerans CIR 18_ITS alone, M. guilliermondii MIR 15_ITS alone, C. halotolerans CIR 18_ITS + C. halotolerans CIR 18_ITS and M. guilliermondii MIR 15_ITS + Trichoderma isolate T.4679 + C. halotolerans CIR 18_ITS + C. halotolerans CIR 18_ITS have greater efficiency of reducing disease infection and severity by approximately 11.11% and 6.67%, respectively, amongst all treatments mentioned.
Źródło:
Journal of Ecological Engineering; 2021, 22, 11; 168-177
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
First Report on Fusarium brachygibbosum Isolate FIR 16_ITS Isolated from Iraqi Wheat Plant
Autorzy:
Ali, Hamdia Z.
Hameed, Mahdi S.
Abdulrahman, Abdulrahman A.
Saood, Hutham M.
Powiązania:
https://bibliotekanauki.pl/articles/123408.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
phylogenetic analysis
rDNA
Iraq
Opis:
In this study, the Fusarium Brachygibbosum fungus isolate FIR 16_ITS was isolated for the first time from the infected wheat plants in Iraq, during the winter of 2018, in the AL-Tewatha region – 20 km south east of Baghdad. In order to verify the identity of the species of the F. brachygibbosum isolate FIR 16_ITS with the growth symptoms on the wheat plants, the wheat seeds and tissue plants were obtained and used as a source for the re-isolation of the infection agent. F. brachygibbosum isolate FIR 16_ITS was hardly identified using visual approach. However, a molecular technique is important in verifying the species of F. brachygibbosum isolate FIR 16_ITS. The isolate obtained was used for the extraction of DNA and later used for the molecular identification and phylogenetic analyses based on rDNA-internal transcribed region (ITS) primer sets. The authors successfully obtained the amplified products of the ITS-rDNA region, and a sequence analysis indicated that the Fusarium sp. isolate FIR 16_ITS species screened in this study belonged to the F. brachygibbosum species. It was recorded in the NCBI under the following information NCBI; BioSample; Accession no.; SAMN11408139; ID: 11408139 and NCBI; BioProject; Accession no.; PRJNA532637; ID: 679434 (Locus Tag Prefix; E7750).
Źródło:
Journal of Ecological Engineering; 2020, 21, 3; 81-86
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ethnobotanical Survey of Medicinal Plants Used in Treating Viral Infection in Saki West Local Government Area, Oyo State, Nigeria
Autorzy:
Fingesi, U. I.
Buochuama, A.
Abdulrahman, Q. A.
Powiązania:
https://bibliotekanauki.pl/articles/1112778.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
ethnobotanical survey
herbs
medicinal plant
viral infection
Opis:
Most indigenous people have acquired expertise in the use of medicinal plants, but information on the utilization of the medicinal plants are poorly documented. Thus, this study deals with the ethnobotanical survey of medicinal plants used in treating viral infections in Saki West Local Government Area, Oyo State. Data was collected using structured questionnaires and oral interviews to acquire information from selected members of Saki West Local Government Area. A total of sixty (60) structured questionnaires were given randomly to respondents in the selected villages in the study area. Data were analyzed using descriptive statistics. The finding shows that the majority of the respondents were females (61.7%). Moreover, 50 % of the respondents were from the age group of 31 to 40 (also the largest group). In addition, a majority (88.3%) of the respondents were married, and only a few (16.7%) had no formal education. Furthermore, the major occupation of the respondents was herb selling (35.0%). The findings on the various plant parts utilized for herbal medicine indicated that the leaves, stem bark and whole root were the most commonly used parts. Most of the respondents also prepared herbal medicine by decoction. What is more, oral ingestion (drinking) was found to be the most (70.0%) preferred mode of administration in the study area. Finally, the major problem encountered while acquiring medicinal plants was wild animal threat. This work indicated that there is a need for an ethnobotanical survey in every state of the nation on the medicinal plants used in the treatment of viral infection.
Źródło:
World News of Natural Sciences; 2018, 17; 89-101
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Removal of Hexavalent Chromium from Aqueous Solution by the Pod of Acacia gerrardii
Autorzy:
Abdulaziz, Mohammed A.
Bakri, Abdulrahman A.
Al-Zahrani, Saleh A.
Al-Zahrani, Majed S.
Al-Lehebi, Abdulrahman N.
Banjar, Fadil M.
Nabag, Mohand I.
Powiązania:
https://bibliotekanauki.pl/articles/779613.pdf
Data publikacji:
2019
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
Biosorption
chromium
Acacia gerrardii
isotherm models
Park kinetic models
Opis:
This study aims at investigating the potential of Acacia gerrardii pod for the removal of Cr(VI) in batch system. Effect of solution pH, biosorbent dosage, initial concentration of Cr(VI), contact time on the removal process was examined. Complete removal of hexavalent chromium was achieved at pH values 1.0 and 2.0 whereas maximum removal of total chromium was obtained at pH of 3.0. The study showed that the biosorption and bioreduction mechanisms were involved in the removal process. The time required for complete removal of Cr(VI) using the pod of Acacia gerrardii was shortened with an increase in biomaterial dosage and decrease in Cr(VI) concentration. Kinetic data was well described using Park kinetic model. Freundlich isotherm model adequately fitted the equilibrium data indication multilayer adsorption of total chromium on the surface of biomaterial. The pod of Acacia gerrardii could be used efficiently for the removal of hexavalent chromium from aqueous solutions.
Źródło:
Polish Journal of Chemical Technology; 2019, 21, 2; 14-19
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An assessment of unstimulated salivary flow rate, IgA and clinical oral dryness among active and passive smokers
Autorzy:
Nigar, Seeme
Hassan, Sobia
Maqsood, Afsheen
Ahmed, Naseer
Al-Askar, Mansour
Mokeem, Sameer A.
Alqutub, Montaser N.
Aldahian, Nada
AlSagob, Eman I.
AlMubarak, Abdulrahman A.
Vohra, Fahim
Abduljabbar, Tariq
Powiązania:
https://bibliotekanauki.pl/articles/2085673.pdf
Data publikacji:
2022-02-15
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
IgA
xerostomia
passive smokers
active smokers
salivary flow rate
oral dryness
Opis:
ObjectivesThe aim of this study was to assess the impact of smoking on the whole salivary flow rate (SFR), IgA levels and clinical oral dryness (COD) among active and passive smokers.Material and MethodsThe participants were categorized as active smokers (N = 54) or passive smokers (N = 163). Saliva was collected in tubes and placed in ice storage at –70°C. Salivary IgA levels were assessed in duplication using the enzyme linked immunosorbent assay (ELISA) method. Following the saliva sample collection, the subjects were assessed for COD using the COD score, SFR and caries. Chi-square test, the t-test and ANOVA were employed to compare the clinical impact of the smoking status associated with specific variables (smoking status, number of cigarettes, active caries, gender, age, COD score, IgA level and SFR). A p-value of <0.05 was considered significant.ResultsTwo hundred and seventeen subjects with the mean age of 32.86±6.30 years, with 145 males (66.8%) and 72 females (33.2%), were included in the study. Among the active smokers, 88.8% were males compared to 11.2% females. The active smokers had the mean age of 32.52 years, a COD score of 1.43, an IgA level of 1.39 g/l, and a SFR of 0.37 ml/min. Among the passive smokers, 59.5% were males and 40.5% were females, with the mean age of 32.97 years, a COD score of 0.87 g/l, an IgA level of 1.47, and a SFR of 0.42 ml/min. Active caries showed a positive correlation with the number of cigarettes, with significance in the >35 years age group (p < 0.05).ConclusionsThe study demonstrated significant differences in SFR, IgA and COD scores among the active and passive smokers. The number of cigarettes had a negative impact on saliva production, IgA levels, the oral health status, and the progression of caries with respect to age and gender. Smoking potentially leads to xerostomia associated with active caries.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2022, 35, 1; 39-51
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improvement of Parkia Seedling Growth using Various Seed Dormancy Breaking Technologies in Different Soil Media
Autorzy:
Oyebamiji, N. A.
Abdulrahman, H. D.
Ogor, A. A.
Powiązania:
https://bibliotekanauki.pl/articles/1078301.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Parkia biglobosa
Parkia seeds
Seedling growth
dormancy breaking
soil media
technologies
Opis:
Improvement of Parkia seedling growth on plant height (PH) using seed dormancy breaking technologies in different soil media was investigated at nursery unit of Department for Forestry and Wildlife Management, Federal University Dutsin-Ma. Completely Randomized Design (CRD) with four replicates was the design used. The data were analyzed using Analysis of Variance (ANOVA) while the means were separated using Fishers’ Least Significant Difference (F-LSD; P≤ 0.05). Emergence of seeds was observed to commence four days after sowing (DAS) in mechanically scarified seeds (MS). The top soil added with mycorrhiza at 120 g (M120+) had significantly higher value (24.01) on PH at 10 weeks after sowing (WAS) in the main effect. In the interactive effect, seeds soaked in 98 % concentrated tetraoxosulphate (V1) (H2SO4) for 2 and 4 minutes (A2 and A4) and sowed in sterilized top soil (SS) and non-sterilized (NS) had significantly higher values (16.70 and 16.25) and (27.60 and 28.25) on PH at 4 and 12 WAS respectively. Seeds soaked in H2SO4 for 6 minutes (A6) and sowed in M120+ had higher value (15.60) on PH at 4 WAS. MS in M60+, hot water (HW) at 80 ºC and 100 ºC for 10 and 5 minutes had higher effect (16.52 and 16.48) on PH at 4 WAS. MS in HW at 60 ºC for 15 minutes and HW 80 ºC in M60+ was significant on PH (26.80, 27.85 and 29.00) at 12 WAS. HW 60 ºC in SS had higher effect (15.95) on PH at 4 WAS. In conclusion, mechanically scarified seeds, seeds soaked in H2SO4 acid for 2-6 minutes and in hot water between 60 ºC to 100 ºC for at most 15 minutes break Parkia dormancy and grow rapidly in ectomycorrhiza soil.
Źródło:
World News of Natural Sciences; 2019, 22; 139-150
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physicochemical properties of pseudobrookite Fe2TiO5 synthesized from ilmenite ore by co-precipitation route
Autorzy:
Mahmoud, Mohamed H. H.
Hessien, Mahmoud M.
Alhadhrami, Abdulrahman
Gobouri, Adel A.
Powiązania:
https://bibliotekanauki.pl/articles/109822.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
ilmenite ore
pseudobrookite
Co-precipitation
nanocrystalline
magnetic properties
Opis:
Pseudobrookite (Fe2TiO5) is a semiconductor with numerous potential applications. Low-grade ilmenite ore has been used as an inexpensive source of Fe and Ti for preparation of Pseudobrookite. Ilmenite was first leached with 20% hydrochloric acid for 3 h at 70°C. Co-precipitation of soluble Fe and Ti from the rich filtrate was carried out at pH ≥ 9.1 followed by calcination at different temperatures (900-1300oC) for 2 h. X-ray diffraction patterns (XRD) showed that a single-phase nanocrystalline pseudobrookite powder was produced. The pH was a critical parameter for the evolution of formation the different sizes, structural morphology, and the magnetic properties of the product. Scanning electron microscope (SEM) images showed that particles synthesized at pH 11.2 contained more agglomerations and were more porous than those synthesized at pH 9.1. As the calcination temperature increases, the Fe2TiO5 changes from a small rod-like structure to an elongated rod-like structure, and finally to interconnected aggregated crystals. The magnetization of the synthesized Fe2TiO5 was measured using a vibrating sample magnetometer (VSM) and was found steadily increase with increasing calcination temperature from 1000 (≈9 emu/g) to 1300°C (16 emu/g). Such a large saturation of magnetization might be due to the high phase purity and well-defined crystallinity of Fe2TiO5.
Źródło:
Physicochemical Problems of Mineral Processing; 2019, 55, 1; 290-300
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Level of disability and associated factors with musculoskeletal disorders among supermarket cashiers
Autorzy:
Algarni, Fahad S.
Alkhaldi, Hatem A.
Zafar, Hamayun
Alhammad, Saad A.
Al-Shenqiti, Abdullah M.
Altowaijri, Abdulrahman M.
Powiązania:
https://bibliotekanauki.pl/articles/2085745.pdf
Data publikacji:
2022-08-01
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
associated factors
occupational injuries
work-related disabilities
supermarkets
cashiers
musculoskeletal diseases
Opis:
ObjectivesThis study aimed to determine the severity of symptoms and the level of disability or difficulty associated with MSDs in the neck, shoulders, upper limbs, lower back, and lower limbs as well as the factors associated with MSDs.Material and MethodsThis investigation collected demographic, health (36-Item Short Form Survey [SF-36]), and occupational related-factors for supermarket cashiers through the administration of several questionnaires, including the Oswestry Disability Index (ODI), Disabilities of the Arm, Shoulder and Hand (DASH), Neck Disability Index (NDI), Lower Extremity Functional Scale (LEFS), and Numeric Rating Scale (NRS) for pain.ResultsOne hundred ninety-three supermarket cashiers participated in this study. The mean scores for disability levels included NDI (M±SD 18.62±14.57), ODI (M±SD 20.74±13.89), DASH (M±SD 15.08±13.90), and LEFS (M±SD 63.06±14.24). Regression analyses demonstrated the existence of significant relationships between the experience of MSDs and several other factors, including the number of working days per week, the preferred working position, marital status and the need for awkward positions.ConclusionsThe results indicate MSDs that signified a mild disability level among young participants. The number of working days per week, the preferred working position, the need to assume awkward positions, and marital status were significantly associated with MSDs. The findings indicated the need for preventive to avoid or minimize the prevalence of MSDs among supermarket cashiers.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2022, 35, 4; 407-423
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Burnout and resilience among physical therapy students: a cross-sectional study
Autorzy:
Almurdi, Muneera M.
Alrushud, Asma S.
Algabbani, Maha F.
Shaheen, Afaf A.
Alsubiheen, Abdulrahman M.
Aati, Sara M.
Aldosari, Rana A.
Alsharif, Reham A.
Alrashed, Fahad A.
Shalabi, Kholood M.
Powiązania:
https://bibliotekanauki.pl/articles/46623859.pdf
Data publikacji:
2024-09-17
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
resilience
burnout
emotional exhaustion
depersonalization
personal achievement
physical therapy students
Opis:
Background This study aimed to examine the prevalence of burnout, determine burnout-related factors, investigate resilience levels, and assess the relationship between burnout and resilience among physical therapy (PT) students at King Saud University (KSU) in Saudi Arabia. Material and Methods This cross-sectional study involved 153 PT students studying at KSU between January and March 2023. The participants completed an online questionnaire, a Maslach Burnout Inventory, and a Brief Resilience Scale. Results Low-to-moderate levels of Emotional Exhaustion (EE) were observed in 85% of the participants and high Depersonalization (DP) levels were reported by 34.2%. Female participants reported higher levels of EE and DP, whereas males had a greater prevalence of low Personal Achievement (PA) levels. Approximately 6.5% of the study participants reported high burnout levels (a combination of high DP, high EE, and low PA). Academic stress, followed by sleeping difficulties and changes in the academic year structure, were the most important factors contributing to higher levels of burnout (75.2%, 56.9%, and 43.8%, respectively). Most study participants around (66.0%) reported normal resilience levels. A significant correlation was detected between resilience and 2 domains of burnout (DP and PA), with the correlation being negative and weak for DP and positive and moderate for PA. Conclusions Overall, low-to-moderate levels of burnout were observed among the PT students who took part. Related factors that contributed to burnout were academic stress, sleeping difficulties, and academic year structure. A normal level of resilience was found to be significantly related to DP and PA but not to EE on the burnout subscales. Higher levels of resilience can be considered to play a protective role against burnout among PT students.
Źródło:
Medycyna Pracy. Workers’ Health and Safety; 2024, 75, 4; 343-354
0465-5893
2353-1339
Pojawia się w:
Medycyna Pracy. Workers’ Health and Safety
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-10 z 10

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