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Millî Eğitim Bakanlığının Yurt Dışına Türkçe ve Türk Kültürü Dersi Öğretmeni Görevlendirme Politikasının Yıllara Göre Değerlendirilmesi
No full textEvaluation and mathematical modeling of delamination and cutting forces in milling of carbon fiber reinforced composite (CFRP) materials
No full textNowadays, weight reducing is become possible with composite materials
taking place of steel (60-80\%) and aluminum (20-50\%). Composite
materials have become the preferred materials for many engineering
applications. However, besides the advantages of composite materials,
there are problems in manufacturing. Manufacturing of fiber reinforced
composite materials are more difficult than other materials. This
situation needs to be very selective in terms of cutting tools. In this
study, a unique PCD cutting tool design was devised which is capable of
eliminating the encountered difficulties, especially the exfoliation
(delamination) problem on laminated/laminar formed composite board
during machining carbon fiber reinforced composite (CFRC) materials.
With this cutting tools delamination and cutting forces investigated on
milling of CFRP materials. 350, 400, 450 m/min cutting speeds and 1270
mm/min constant feed rate were selected as cutting parameters. The first
tool were showed the best performance in consequence of the tests.
Increasing cutting speed influences the and cutting forces posivitely.
Besides, the effective parameters on delamination and cutting forces,
were determined according to the obtained ANOVA statistics after the
regression analysis
Determination of Antimicrobial Activity of Different Essential Oils Obtained from Plants on Staphylococcus aureus Strains Isolated from Foods
No full text
Diagnostic value of urinary luteinizing hormone levels in the monitoring of precocious puberty treatment
No full textObjective: To determine whether first-voided urinary LH (FV-ULH) - level
measurement can adequately assess pubertal suppression as much as
standard tests can. Subjects and methods: The study group included
patients with central precocious puberty and rapidly progressing early
puberty who received up to 3 - 4 doses of GnRHa therapy monthly and did
not have adequate hormonal suppression after GnRH stimulation (90-minute
LH level > 4 IU/L). Design: All of the participants underwent an LHRH
test just after admission to the study. According to the stimulated peak
LH levels, the patients were divided into 2 groups and followed until
the end of the first year of treatment.The concordance between FV-ULH
and stimulated LH levels was assessed. Results: The FV-ULH levels in
patients with inadequate hormonal suppression were significantly high
compared to patients with adequate hormonal suppression. FV-ULH levels
were very strongly correlated with stimulated LH levels (r = 0.91). Its
correlation with basal LH levels was significant (r = 0.65). However,
this positive correlation was modestly weakened after the first year of
treatment.The cutoff value for FV-ULH of 1.01 mlU/mL had the highest
sensitivity (92.3\%) and specificity (100\%). Conclusion: FV-ULH levels,
using more reliable and sensitive assay methods, can be used to monitor
the adequacy of GnRHa therapy
Determination of the total antioxidant and oxidant status of some galactagogue and herbal teas
No full textThis research was aimed to evaluate the total antioxidant status (TAS)
and the total oxidant status (TOS) of galactagogues and herbal teas.
Galactagogues and herbal teas used for other purposes were sold in the
market for breastfeeding mothers and babies. Tea infusions were prepared
by following brewing recipe on the package. TAS (mmol/L) and TOS (mu
mol/L) were measured and oxidative stress indices (OSI) were calculated.
TAS values of the mixed-herbal teas in granule form that sold as still
tea were found to be higher (( 1.5 +/- 0.00)-(1.7 +/- 0.14) mmol/L)
compared to other galactagogue tea types (P< 0.05). TAS value of the
mixed-herbal tea in classic tea bag was (1.0 +/- 0.06) mmol/L while the
TAS value of the vitamin added mixed-herbal tea was (3.0 +/- 0.00)
mmol/L (P< 0.05). The TAS and TOS values of the night-teas were
simultaneously found to be higher compared to herbal teas (P < 0.05).
Besides, the highest OSI values among herbal teas was chamomile tea
(6.96). In conclusion, antioxidant/oxidant status of galactagogues and
other herbal teas might vary according to their form (powder or
granule), type, variety of herbs in the composition, and the brand.
Moreover, some galactagogues and other herbal teas have high levels of
oxidant activity as well as antioxidant activity. Also, it seems that
vitamin addition is important for balancing antioxidant/oxidant status
of all tea types. (C) 2020 Beijing Academy of Food Sciences. Production
and hosting by Elsevier B.V. on behalf of KeAi Communications Co., Ltd