Thermodynamic Analysis of Effects of the Inlet Air Cooling on Cycle Performance in Combined Brayton-Diesel Cycle

In the present study, the effects of inlet air cooling on compound cycle performance in a diesel gas turbine engine system where waste heat is used in the composite power system in the sustainable energy system were investigated thermodynamically. The effects of the inlet air cooling the system that enhances power production and the resulting thermal efficiency values were analyzed based on various operational variables gas turbine pressure ratio, diesel engine compression ratio, gas turbine inlet and fresh air inlet temperatures, etc. . The energy losses in each system component were determined and the second law efficiency of the system was determined based on the introduced operational parameters. The gas turbine unit in the model included a gas generator with two compressors and a high-pressure turbine, and a low-pressure power turbine running on a separate shaft. The diesel engine and gas-generator exhaust gases were mixed and expanded in a low-pressure turbine, leading to the production of power with the waste energy. In the cycle, an intake air cooler, an intercooler and a recuperative air pre-heater were used. In the intake air cooling cycle, the power increase was around 15% when the pressure rate of the low-pressure compressor was 3.5. Natural gas was used as fuel in the thermodynamic model. The cycle irreversibilitywas used in the calculations based onthe thermodynamic concepts

Draft Genome Sequences of Two Heat-Resistant Mutant Strains (A52 and B41) of the Photosynthetic Hydrogen-Producing BacteriumRhodobacter capsulatus

The draft genome sequences of two heat-resistant mutant strains, A52 and B41, derived from Rhodobacter capsulatus DSM 1710, and with different hydrogen production levels, are reported here. These sequences may help understand the molecular basis of heat resistance and hydrogen production in R. capsulatus.Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK)Publisher's Versio

Calibration of comprehension and performance in L2 reading

Comprehension monitoring is crucial for successful reading. Although the researchers appreciate the importance of comprehension monitoring in L2 reading, there are only a few studies done on the comprehension monitoring ability of L2 readers. The main aim of this study was to investigate the comprehension monitoring abilities of university students while reading expository texts in L2. The results showed that the students’ were not able to calibrate their comprehension at above chance level whereas they were able to calibrate their performance. The results were discussed comparative to findings from earlier research in L1 reading

Effect of a single application of CPP-ACPF varnish on the prevention of erosive tooth wear: An AAS, AFM and SMH study

Purpose: The aim of this study was to investigate the in vitro effect of casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) and fluoride-containing varnish on prevention enamel erosive tooth wear. Materials and Methods: A total of 28 enamel samples were prepared from human molars, divided into four groups: CPP-ACPF varnish, TCP-F varnish, NaF varnish, and deionised water. For the remineralisation process stimulated human pooled saliva was used. After treatment, all enamel samples were exposed to 10 ml of Coca Cola. Ca ++ release was determined by atomic absorption spectroscopy (AAS). The surface topography was evaluated by atomic force microscopy (AFM). Surface microhardness of enamel was analysed and SMHR % (surface microhardness reduction) was calculated. Data were analysed with repeated measures analysis of variance (ANOVA). Results: Deionised water demonstrated a statistically significantly higher Ca +2 release compared to those of groups NaF > fTCP > CPP-ACPF, respectively (p <0.01). All groups measured for root-mean-square-roughness (Rrms) showed a statistically significantly difference of 6 x 6 μm 2 and 12 x 12 μm 2 enamel area (p <0.05) compared with a negative control group. CPP-ACPF varnish showed rougher surfaces than all remineralisation groups. SMHR % of enamels were as follows: CPP-ACPF < fTCP < NaF < deionised water (p <0.01). Conclusion: According to the findings of this study; CPP-ACP containing agents have a statistically statistically significant effect on preventing dental erosion. Among these, CPP-ACPF-containing remineralisation agents have the most effect on the remineralisation process

Draft Genome Sequences of Two Heat-Resistant Mutant Strains (A52 and B41) of the Photosynthetic Hydrogen-Producing Bacterium Rhodobacter capsulatus

The draft genome sequences of two heat-resistant mutant strains, A52 and B41, derived from Rhodobacter capsulatus DSM 1710, and with different hydrogen production levels, are reported here. These sequences may help understand the molecular basis of heat resistance and hydrogen production in R. capsulatus

Relationship between pathological response and molecular subtypes in locally advanced breast cancer patients receiving neoadjuvant chemotherapy

Majority of patients with breast cancer were diagnosed with locally advanced stages of the disease (54%). This study aimed to explain the pathological response received to neoadjuvant chemotherapy (NACT) according to the molecular classification of breast cancer in patients with locally advanced tumors. One hundred and one patients with locally advanced breast cancer treated with neoadjuvant chemotherapy were analyzed. Patients were classified into five molecular subtypes based on the profile of the estrogen receptor, progesterone receptor, HER2, and Ki-67. We determined associations between complete pathological response (no invasive tumor after neoadjuvant chemotherapy) and molecular subgroups. Most patients had luminal A tumors (n: 28, 27.7%). The overall rate of complete pathological response (pCR) was 34.7% (n:35). Tumors that presented with the highest rate of pCR were pure HER2-positive, at 60% (n:6; OR, 3.2; 95% CI, 0.8-12.2). According to logistic regression analysis, the factors affecting pCR were HER2 positivity and clinically positive axilla before NACT. Luminal A tumors had a significantly lower pCR rate. (7.1%,p: 0.001). Despite the low pCR rate, Luminal A tumor had the best survival rate in the subgroups (p < 0.001). However, there was no difference between EFS and OS according to pCR in any molecular subgroups. Pathological complete response is directly related to the subtypes of breast cancer. A high complete pathological response rate is observed in the pure HER2-positive group. However, EFS and OS were not statistically significant in patients with and without pCR