يعرض 1 - 20 نتائج من 113 نتيجة بحث عن '(((( 50 ppm decrease ) OR ((( 50 we decrease ) OR ( 50 ms decrease ))))) OR ( 50 _ decrease ))', وقت الاستعلام: 0.12s تنقيح النتائج
  1. 1
  2. 2

    Ecotoxicological Assessment of Thermally- and Hydrogen-Reduced Graphene Oxide/TiO<sub>2</sub> Photocatalytic Nanocomposites Using the Zebrafish Embryo Model حسب Halema Al-Kandari (6316961)

    منشور في 2019
    "…For the RGOTi, the no observed effect concentration (NOEC, mortality/teratogenicity score <20%) and the median lethal concentration (LC<sub>50</sub>) were <400 and 748.6 mg/L, respectively. …"
  3. 3
  4. 4

    Corrigendum: Decreased interfacial dynamics caused by the N501Y mutation in the SARS-CoV-2 S1 spike:ACE2 complex حسب Wesam S. Ahmed (10170053)

    منشور في 2022
    "…<p dir="ltr">Corrigendum: Decreased interfacial dynamics caused by the N501Y mutation in the SARS-CoV-2 S1 spike:ACE2 complex: Frontiers in Molecular Biosciences <a href="https://dx.doi.org/10.3389/fmolb.2022.846996" target="_blank">https://dx.doi.org/10.3389/fmolb.2022.846996</a>, published online 22 July 2022.…"
  5. 5
  6. 6

    Adult appendicitis score versus Alvarado score: A comparative study in the diagnosis of acute appendicitis حسب Mohamed Said Ghali (16810713)

    منشور في 2023
    "…It requires proper management to decrease mortality and morbidity. Clinical scoring systems for diagnosing AA aimed to decrease the use of radiological scans and the rate of negative appendectomies (NA). …"
  7. 7

    The Impact of COVID-19 on the HIV Cascade of Care in Botswana – An Interrupted Time Series حسب Alice Sehurutshi (21842696)

    منشور في 2024
    "…In multivariable Poisson interrupted time series regression, the COVID-19 lockdown was associated with a 27% decrease in the monthly numbers of HIV tests (IRR 0.73, 95%CI 0.72–0.73), a 25% decrease in HIV positive tests (IRR 0.75, 95%CI 0.71–0.79), and a 43% reduction in ART initiations (IRR 0.57, 95%CI 0.55–0.60). …"
  8. 8

    Antibody‐based methods for the measurement of α‐synuclein concentration in human cerebrospinal fluid – method comparison and round robin study حسب Brit Mollenhauer (482499)

    منشور في 2018
    "…Several reasons can account for this variability, including technical ones, such as inter‐assay and inter‐laboratory variation (reproducibility). We compared four immunochemical methods for the quantification of α‐synuclein concentration in 50 unique CSF samples. …"
  9. 9

    Assessment Tools for Pulmonary Involvement in Patients with Ankylosing Spondylitis: Is Diaphragmatic Ultrasonography Correlated to Spirometry? حسب Rim Dhahri (21406871)

    منشور في 2023
    "…</p><h3>Methods</h3><p dir="ltr">We conducted a cross-sectional study of 50 patients with radiographic SpA, over six months. …"
  10. 10
  11. 11
  12. 12

    Trace element composition of size-fractionated suspended particulate matter samples from the Qatari Exclusive Economic Zone of the Arabian Gulf: the role of atmospheric dust حسب Oguz Yigiterhan (14151006)

    منشور في 2020
    "…As expected, we found that Ca was removed in Qatari dust; however, the concentrations (ppm) for most elements actually increased after leaching because the reduction in sample mass resulting from the removal of CaCO<sub>3</sub> by the leach was more important than the loss of metals solubilized by the leach. …"
  13. 13

    Mirizzi Syndrome: Mastering the Challenge, Characterization and Management Outcomes in a Retrospective Study of 60 Cases حسب Yousef Yahia (19756989)

    منشور في 2024
    "…Laparoscopic cholecystectomy was the most common surgical approach (76.7%), particularly in type 1 (79.6%), and decreased to 50% in advanced types. Hepaticojejunostomy was more common in the advanced types.…"
  14. 14

    Regional variations in incidence of surgical site infection and associated risk factors in women undergoing cesarean section: A systematic review and Meta-Analysis حسب Nazmul, Islam

    منشور في 2025
    "…The SSI incidence in LMICs was 8.0 % (95 % CI: 6.0 %–10.0 %) with moderate certainty, while the incidence in HICs was 5.0 % (95 % CI: 4.0 %–7.0 %) with low certainty. …"
    احصل على النص الكامل
    احصل على النص الكامل
    احصل على النص الكامل
    article
  15. 15

    Recyclable polyaspartate-coated magnetic nanoparticles for sustainable control of calcite and barite scales in oilfield operations حسب Abdelrahman T. Abdelaal (14674629)

    منشور في 2026
    "…Dynamic tube-blocking tests at 100 °C and 1000 psi further confirm effective scaling suppression for 60 min at 50 ppm, demonstrating that immobilization of PASP on a magnetic carrier preserves its intrinsic inhibitory function while enabling recyclable deployment not achievable with free PASP. …"
  16. 16

    Excess pCO<sub>2</sub> and carbonate system geochemistry in surface seawater of the exclusive economic zone of Qatar (Arabian Gulf) حسب Connor Izumi (17337868)

    منشور في 2022
    "…Its values in the Gulf ranged from −50 to −310 μmol kg<sup>−1</sup> implying CaCO<sub>3</sub> precipitation. …"
  17. 17
  18. 18

    Sleeve Gastrectomy in Patients with Type 2 Diabetes: Anthropometric and Cardiometabolic Improvements at 1, 3, 5, 7, and 9 years—Are the Initial Benefits Sustained? حسب Wahiba Elhag (5245547)

    منشور في 2025
    "…The mean preoperative age was 44.38 ± 9.50 years and body mass index (BMI) was 43.81 ± 6.98 kg/m<sup>2</sup>. …"
  19. 19

    Predictors of prolonged hospitalization among geriatric trauma patients using the modified 5-Item Frailty index in a Middle Eastern trauma center: an 11-year retrospective study حسب Husham Abdelrahman (768893)

    منشور في 2025
    "…<h3>Background</h3><p dir="ltr">Using a validated tool, we explored the prevalence, risk factors, and predictors of longer hospitalization among hospitalized geriatric patients.…"
  20. 20

    Predictors of mortality and morbidity in critically ill COVID‐19 patients: An experience from a low mortality country حسب Mohamad Y. Khatib (11659459)

    منشور في 2022
    "…The median (IQR) age of patients was 50 (41–59) years. Diabetes (47.3%) and hypertension (42.6%) were the most common comorbidities. …"