Autor: AbdulRahman, A. - Prolib Integro

Skocz do pozycji: 1.

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.
Tematy:: exchange rate
spot exchange rate
fixed exchange rate
inflation rate; Pokaż więcej
Wydawca:: Akademia Bialska Nauk Stosowanych im. Jana Pawła II w Białej Podlaskiej
Powiązania:: https://bibliotekanauki.pl/articles/2051471.pdf Link otwiera się w nowym oknie
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.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

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.
Tematy:: Cladosporium halotolerans
Meyerozyma guilliermondii
multibiocontrol agent; Pokaż więcej
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Powiązania:: https://bibliotekanauki.pl/articles/2027993.pdf Link otwiera się w nowym oknie
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.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

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.
Tematy:: phylogenetic analysis
rDNA
Iraq; Pokaż więcej
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Powiązania:: https://bibliotekanauki.pl/articles/123408.pdf Link otwiera się w nowym oknie
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).
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Photophysical and biological studies on structurally modified chlorophenyl-substituted pyrazolone derivatives
Autorzy:: Naglah, Ahmed M.
Almehizia, Abdulrahman A.
Maniyar, A.K.
Marrakkur, Vidyagayatri
Naik, Lohit
Tematy:: Chlorophenyl-substituted pyrazolone
biological activity
HOMO
Highest Occupied Molecular Orbital
LUMO
Lowest Unoccupied Molecular Orbital
Mulkin plot; Pokaż więcej
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Powiązania:: https://bibliotekanauki.pl/articles/59124247.pdf Link otwiera się w nowym oknie
Opis:: In this study, chlorophenyl-substituted pyrazolone derivatives (5a–5c) were synthesized via the Baylis-Hillman acetate reaction. Comprehensive physicochemical characterization was conducted using 1H-NMR, FT-IR, and mass spectroscopy. Density Functional Theory (DFT) calculations at the B3LYP/6-31(G) level was employed to optimize molecular geometries and investigate electronic properties, revealing predominantly planar structures, with notable deviations in the pyrazole group. The HOMO and LUMO analyses showed π-delocalization across the entire molecule, with charge-transfer transitions dominating the excited states. Global Chemical Reactivity Descriptors (GCRD), including chemical potential, hardness, and electrophilicity index, were used to assess molecular stability and reactivity, indicating the molecules’ resistance to electron cloud deformation. Biological evaluations revealed exceptional antimicrobial and antifungal activities of the derivatives, with compound 5a demonstrating the highest efficacy against S. aureus, E. coli, A. niger and C. albicans. Furthermore, antiproliferative studies against HepG2 liver carcinoma cells showed that compound 5a exhibited superior anticancer activity (IC50 = 6 μg/mL), attributed to its structural features, such as chlorophenyl groups and a piperidin-4-one moiety. These moieties enhance the compound’s lipophilicity, facilitating cell membrane penetration and ROS generation, which contribute to apoptosis and inhibition of cancer cell growth. The findings suggest that chlorophenyl-pyrazolone derivatives, particularly 5a, hold promise as potent candidates for antimicrobial and anticancer therapies, paving the way for further pharmaceutical development.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

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.
Tematy:: ethnobotanical survey
herbs
medicinal plant
viral infection; Pokaż więcej
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Powiązania:: https://bibliotekanauki.pl/articles/1112778.pdf Link otwiera się w nowym oknie
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.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Green preparation of argentum tungstate and characterization as nanorod with catalytic evaluation for synthesizing tetracyclic xanthenes and validation as anti-TB
Autorzy:: Almehizia, Abdulrahman A.
Al-Omar, Mohamed A.
Naglah, Ahmed M.
Ghabbour, Hazem A.
Hassan, Ashraf S.
Khatab, Tamer K.
Tematy:: β-Naphthol
dimedone
silver
xanthene
tuberculosis; Pokaż więcej
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Powiązania:: https://bibliotekanauki.pl/articles/59124239.pdf Link otwiera się w nowym oknie
Opis:: The work presented a facile, one-step procedure as a green assembly process for preparing silver tungstate nanorod by hydrothermal technique via a chemical reaction between silver nitrate and sodium tungstate. The synthesized precipitate was characterized using X-ray diffraction (XRD) transmission electronic microscope (TEM) and scanning electron microscopy (SEM) to ensure the formation of crystallization and single-phase material. The prepared nanorods undergo a catalytic evaluation to synthesize tetrahydrobenzo[a] xanthene-11-one derivatives by a one-pot reaction of β-naphthol, dimedone, and aromatic aldehyde with a catalytic amount of silver tungstate under the solvent-free condition at 60–70°C. ArgC is one of the L-arginine biosynthetic pathways of mycobacterium tuberculosis. The molecular docking explains that all the synthesized compounds presented high ligand ability for the targeted enzyme compared with xanthene-9-carboxylic acid as a reference.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

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.
Tematy:: Biosorption
chromium
Acacia gerrardii
isotherm models
Park kinetic models; Pokaż więcej
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Powiązania:: https://bibliotekanauki.pl/articles/779613.pdf Link otwiera się w nowym oknie
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.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Synthesis and characterization of curcumin-encapsulated loaded on carboxymethyl cellulose with docking validation as α-amylase and α-glucosidase inhibitors
Autorzy:: Almehizia, Abdulrahman A.
Al-Omar, Mohamed A.
Al-Obaid, Abdulrahman M.
Naglah, Ahmed M.
Bhat, Mashooq A.
Ghabbour, Hazem A.
Khatab, Tamer K.
Hassan, Ashraf S.
Tematy:: curcumin
carboxymethyl cellulose
α-Amylase
α-Glucosidase
diabetes mellitus treatment; Pokaż więcej
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Powiązania:: https://bibliotekanauki.pl/articles/59124227.pdf Link otwiera się w nowym oknie
Opis:: In reaction to the expanding predominance of diabetes mellitus, curcumin nanoparticles stacked on carboxymethyl cellulose (CMC) composite were effectively synthesized, characterized, and examined utilizing UV/Vis and FTIR spectroscopy combined with transmission electron microscopy (TEM). The bioactivity of curcumin (Cur), carboxymethyl cellulose (CMC), and curcumin nanoparticles stacked with carboxymethyl cellulose (CUR-CMC) was tried through atomic docking approval as an α-amylase and α-glucosidase inhibitor. The conclusion illustrated that the curcumin-supported CMC is more potent than CUR itself self the validation presented is compared with acarbose as a reference molecule and then CUR-CMC can presented as promising in curing hyperglycemia by decreasing the absorption of glucose.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

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
Tematy:: IgA
xerostomia
passive smokers
active smokers
salivary flow rate
oral dryness; Pokaż więcej
Wydawca:: Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Powiązania:: https://bibliotekanauki.pl/articles/2085673.pdf Link otwiera się w nowym oknie
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.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

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.
Tematy:: Parkia biglobosa
Parkia seeds
Seedling growth
dormancy breaking
soil media
technologies; Pokaż więcej
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Powiązania:: https://bibliotekanauki.pl/articles/1078301.pdf Link otwiera się w nowym oknie
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.
Dostawca treści:: Biblioteka Nauki

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