يعرض 301 - 320 نتائج من 1,199 نتيجة بحث عن '(( 50 ((nn decrease) OR (a decrease)) ) OR ((( 2 1 decrease ) OR ( a systematic decrease ))))*', وقت الاستعلام: 0.23s تنقيح النتائج
  1. 301

    Experimental study of exhaust emissions and performance of a dual fuel IDI diesel engine حسب Badr, O.

    منشور في 1999
    "…Dual fuel engines of the compression ignition type provide an alternative approach for I.C. engines to improve economy, reduce exhaust emissions and achieve a greater power. The present contribution is an experimental investigation to evaluate such a statement using a modified Ricardo E6 indirect injection diesel engine. …"
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  6. 306

    Aquaculture sediments amended with biochar improved soil health and plant growth in a degraded soil حسب Sajid, Mehmood

    منشور في 2023
    "…However, the same treatment significantly decreased proline content by 74.9 %, Malondialdehyde by 65.6 %, H2O2 by 65.1 %, and Cr concentration in spinach root and shoot tissues. …"
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  7. 307

    Qatar Culture Collection of Microalgae: A Sustainable Source for Biodiesel Production and Omega Fatty Acid Compounds حسب Bounnit, Touria

    منشور في 2016
    "…The comparative analysis of the QUCCCM isolates growth rate showed that Nannochloris sp. is the fastest growing isolate with a maximum value of 1.013 day-1. In terms of lipid contents, the results indicate a variety of the amounts. …"
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  8. 308

    Elastic properties of chiral, anti-chiral, and hierarchical honeycombs: A simple energy-based approach حسب Mousanezhad, Davood

    منشور في 2016
    "…We found that introducing a hierarchical refinement increases the Young's modulus of hexagon based honeycombs while decreases their shear modulus. …"
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  9. 309
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    Impact of the COVID-19 pandemic on sexually transmitted infection testing and diagnosis in Lebanon: A retrospective chart review حسب Sunji, Nadine

    منشور في 2024
    "…Post-COVID-19 onset, a total of 1350 VCT services and 406 medical consultations were provided, an overall 45 % decrease compared with pre-COVID-19 onset. The prevalence pre-COVID-19 onset of HIV, syphilis, HBV, and HCV was 0.8 %, 0.3 %, 0.2 %, and 0.1 %, respectively, and post-COVID-19 onset 1.2 %, 0.7 %, 0.3 %, and 0.3 %, respectively. …"
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    article
  11. 311

    Dynamics of Neisseria gonorrhoeae transmission among female sex workers and clients: A mathematical modeling study حسب Houssein H., Ayoub

    منشور في 2024
    "…Increasing asymptomatic treatment coverage among FSWs from 0 % to 50 % decreases prevalence from 8.2 % to 0.4 %, 0.6 % to 0.1 %, and 0.2 % to 0.0 %, respectively, with very low prevalence when coverage exceeds 50 %. …"
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    article
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  14. 314

    Investigating the blood-host plasticity and dispersal of Anopheles coluzzii using a novel field-based methodology حسب Orsborne J.

    منشور في 2019
    "…Blood-meal analysis using PCR showed statistically significant variation in blood-meal origins for mosquitoes collected across the 250 m transect: with decreasing trend in Bovine Blood Index (OR = 0.60 95% CI: 0.49-0.73, P < 0.01) and correspondingly, an increasing trend in Human Blood Index (OR = 1.50 95% CI: 1.05-2.16, P = 0.028) as the transect approached the village. …"
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  15. 315

    Turning point in COVID-19 severity and fatality during the pandemic: a national cohort study in Qatar حسب Chemaitelly, Hiam

    منشور في 2023
    "…Incidence rate for severe, critical or fatal COVID-19 throughout the pandemic was 1.43 (95% CI 1.35 to 1.50) per 1000 person years. …"
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  16. 316

    Spectral and Structural Properties of High-Quality Reduced Graphene Oxide Produced via a Simple Approach Using Tetraethylenepentamine حسب Alkhouzaam A.

    منشور في 2022
    "…method, were functionalized using two different GO:TEPA ratios (1:5 and 1:10). The reduction of GO was evaluated and confirmed by different spectroscopic and microscopic techniques. …"
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  17. 317

    Intercalation of ionic liquids into bentonite: Swelling and rheological behaviors حسب Nasser, M. S.

    منشور في 2016
    "…The results from particle sizes and Zeta potential measurements have shown that bentonite intercalated with IL-1 and IL-2 are the most effective in decreasing the overall repulsive forces and increasing the attractive forces on the bentonite surface. …"
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  18. 318

    Investigating the effect of the air inlet temperature on the combustion characteristics of a spark ignition engine fueled by biogas حسب Ebrahemi, Abdullah Ebrahem

    منشور في 2020
    "…The effect of varying the air manifold temperature from 25 to 50°C on the combustion characteristics as well as engine performance under full load condition in a SI engine fueled by gasoline and biogas mixtures has been investigated. …"
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  19. 319

    Environment Degradation and Economic Growth in the Qatar Economy: Evidence from a Markov Switching Equilibrium Correction Model حسب Charfeddine, Lanouar

    منشور في 2016
    "…This variable is employed as second proxy of environment quality measures. This data set used is a quarterly data and covers the period 1975Q1 to 2007Q4 for variables used for ecological footprint equation and covers the periods 1980Q1 to 2010Q4 for the CO2 emissions equations variables. …"
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  20. 320