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Morphological and radiative characteristics of soot aggregates: Experimental and numerical research
No full textThe study is aimed at investigating the radiative properties of soot
aggregates at determined morphological features using both experimental
and numerical methods. Soot aggregates collected from air monitoring
stations in different locations were examined. The locations were
divided into three groups. The first group (Case 1) included the coastal
and industrial zone; the second group (Case 2) consisted of small and
large cities; and the third group (Case 3) included areas in the
neighbourhood of thermal power plants. The absorbance measurements of
the soot aggregates were conducted in the visible and near-infrared
spectra, and in the wavelength range of 2 mu m-20 mu m. The samples were
characterised by scanning electron microscopy (SEM), and their radiative
properties were assessed using the discrete dipole approximation (DDA)
for numerically generated fractal aggregates with two popular refractive
indices of m = 1.60 + 0.60i and m = 1.90 + 0.75i. Calculations were
conducted for primary particles in point-contact, with 20\% overlapping
and with a coating (50\% and 80\%) in the wavelength range of 0.4-1.064
mu m. The largest measured absorbance values in both the winter and
summer seasons were found in the cities in Case 1, and the x-ray
diffraction (XRD) phases of the samples were also presented. The
radiative properties of the aggregates, i.e., D-f = 1.78 and k(f) = 2.0
representing Case 3, were close to those of aggregates with D-f = 2.1
and k(f) = 2.35 representing Case 1 in the investigated wavelength
range. The calculated radiative properties and the experimental
absorbance measurements for point-contact and overlapping situations
showed the same trend in the examined wavelengths. The absorbance
properties of the samples of coastal and industrial zones were
distinctively higher than others in the wavelength range of 2 mu m-20 mu
m which could be attributed to the PAH effects
Çevre Akademik Başarısı ve Çevreye Yönelik Tutumla İlgili Deneysel Çalışmaların Sistematik Alanyazın İncelemesi
No full textSuccinivibrionaceae is dominant family in fecal microbiota of Behçet’s Syndrome patients with uveitis
No full text
Trimebutine Maleate Monotherapy for Functional Dyspepsia: A Multicenter, Randomized, Double-Blind Placebo Controlled Prospective Trial
No full textBackground and Objectives:Functional dyspepsia (FD) is one of the most
common functional gastrointestinal disorders; it has a great impact on
patient quality of life and is difficult to treat satisfactorily. This
study evaluates the efficacy and safety of trimebutine maleate (TM) in
patients with FD.Materials and Methods: A multicenter, randomized,
double-blind, placebo controlled, prospective study was conducted,
including 211 patients with FD. Participants were randomized to receive
TM 300 mg twice per day (BID, 108 patients) or placebo BID (103
patients) for 4 weeks. The Glasgow Dyspepsia Severity Score (GDSS) was
used to evaluate the relief of dyspepsia symptoms. Moreover, as a pilot
secondary endpoint, a substudy (eight participants on TM and eight on
placebo) was conducted in to evaluate gastric emptying (GE), estimated
using a 99mTc-Tin Colloid Semi Solid Meal Scintigraphy test.Results: Of
the 211 patients enrolled, 185 (87.7\%) (97 (52.4\%) in the TM group and
88 (47.6\%) in the placebo group) completed the study and were analyzed.
The groups did not differ in their demographic and medical history data.
Regarding symptom relief, being the primary endpoint, a statistically
significant reduction in GDSS for the TM group was revealed between the
first (2-week) and final (4-week) visit (p-value = 0.02). The 99 mTc-Tin
Colloid Semi Solid Meal Scintigraphy testing showed that TM
significantly accelerated GE obtained at 50 min (median emptying 75.5\%
in the TM group vs. 66.6\% in the placebo group,p= 0.036). Adverse
effects of low to moderate severity were reported in 12.3\% of the
patients on TM.Conclusion: TM monotherapy appears to be an effective and
safe approach to treating FD, although the findings presented here
warrant further confirmation
