The Effects of Potato Puree and Bread Crumbs on Some Quality Characteristics of Low Fat Meatballs

Haluk Ergezer,Tolga Akcan,Meltem Serdarog˘ lu 한국축산식품학회 2014 한국축산식품학회지 Vol.34 No.5

The purpose of this study was to determine the effects of using different amounts of potato puree (PP) (10 or 20%) and10% bread crumbs (BC) as an extender and also control samples (C) with no added extender on chemical composition,energy values, cooking analyses, colour measurements, water holding capacity (WHC), penetration values, thiobarbituricacid value (TBA) and sensory analyses of meatballs. Meatball samples were cooked in a pre-heated 180°C electric oven. Uncooked meatballs formulated with 20% PP had the highest moisture content. No significant differences were recordedfor protein contents of uncooked samples. The highest cooking yield was found in samples extended with 10% BC. Increas-ing PP from 10% to 20% increased cooking yield of meatballs. 20% PP increased moisture and fat retention values andwater holding capacity of meatballs. Meatballs with 10% BC had the lowest (the hardness in the texture) and meatballs withthe 20% PP had the highest (the softness in the texture) penetration values. Formulating meatballs at a level of 20% resultedlower L* values. TBA values of control samples were higher than in PP added samples at the end of the storage period. Flavour scores for meatballs formulated with PP were higher than control and meatballs formulated with BC. Meatballsformulated with 10% PP had similar overall acceptability with meatballs added with 10% BC.

The use of tincal calcination plant waste as an additive in ceramic wall tile production

Haluk CEL K 한양대학교 세라믹연구소 2014 Journal of Ceramic Processing Research Vol.15 No.6

The aim of the present study is to extend the utilization of tincal calcination plant waste (TCW) of Kirka Borax Company (KBC) in wall tile production by replacing marble in suitable amounts. It is worthy mentioning that the TCW has been neither tested for tile production nor characterized for academically, yet until today. First of all, the characteristic features of TCW were determined by some analyses techniques such as quantitative XRD analysis, XRF and DTA-TGA analyses. Then, representative experimental wall tile formulations were prepared by progressive incorporation of TCW in wall tile recipes. A total of four formulations was prepared with 2, 4, 6 and 9 wt.% TCW incorporation and shaped by dry pressing. The representative tiles were single fast-fired in an industrial roller furnace at a peak temperature of 1150 o C for a total firing time of 38 min. The physico-mechanical properties namely linear firing shrinkage, water absorption, fired flexural strength of the representative samples were measured in accordance with the standard procedures. According to the results, the addition of TCW appeared to improve liquid phase development with better physical properties compared to those of standard composition for the firing regime involved. The results indicated a prospect for using the waste in wall tile formulations up to 4 wt%.

The bond work index of binary and ternary mixtures of ceramic raw materials

Haluk Celik 한양대학교 세라믹연구소 2010 Journal of Ceramic Processing Research Vol.11 No.5

The Effectiveness of Conceptual Change Texts in Remediating High School Students’ AlternativeConceptions Concerning Chemical Equilibrium

Haluk ÖZMEN 서울대학교 교육연구소 2007 Asia Pacific Education Review Vol.8 No.3

This study investigated the effectiveness of conceptual change texts in remediating high school students’ alternative conceptions concerning chemical equilibrium. A quasi-experimental design was used in this study. The subjects for this study consisted of a total 78 tenth-grade students, 38 of them in the experimental group and 40 of them in the control group. A questionnaire, the Alternative Conceptions about Chemical Equilibrium Test (ACCET), was developed and administered to students as a pretest and posttest. While the experimental group received a conceptual change text instruction, the control group received a traditional style instruction. The results of the study indicated that the students in the experimental group showed significantly greater levels of achievement than the students in the control group. Moreover, in both groups the percentages of students’ alternative conceptions decreased in the however the experimental group did better than the control group.

Effect of spray-dried powder granularity on porcelain tile properties

Haluk Celik 한양대학교 세라믹연구소 2011 Journal of Ceramic Processing Research Vol.12 No.4

Porcelain tiles are a ceramic product with high technical and aesthetic performance, whose composition is formulated from a mixture of clay or kaolin, quartz and feldspar. The industrial processing of porcelain tiles consists of various stages such as wet milling, spray-drying, pressing of the spray-dried powder and firing. This paper is a study focusing on determining the influence of the industrially spray-dried powder particle size distribution on technological porcelain tile properties. Five granulometric compositions were prepared artificially with the spray-dried powder: very coarse (VC), coarse (C), medium (M), fine (F), and very fine (VF). The mixtures obtained were formed by pressing at 40 Mpa and fast fired with a maximum temperature of 1220 oC in industrial conditions. The results revealed that the VF composition had better sintering properties,i.e. lower water absorption (0.084%) and porosity, and a higher bending strength (46 N/mm2) than the other granulometric compositions prepared as a result of a larger amount of spherical regular shaped fine granules in the composition.

Efficiency calibration of a coaxial HPGe detector-Marinelli beaker geometry using an 152Eu source prepared in epoxy matrix and its validation by efficiency transfer method

Haluk Yücel,Senem Zümrüt,Recep Bora Narttürk,Gizem Gedik 한국원자력학회 2019 Nuclear Engineering and Technology Vol.51 No.2

In this study, an in-house 152Eu calibration source was produced from a custom epoxy matrix with adensity of r ¼ 1.14 g cm 3, which is chemically stable and durable form after its solidification. The homogeneityof 152Eu in matrix was obtained better than 98%. For a Marinelli beaker geometry, an efficiencycalibration procedure was applied to a n-type, coaxial, 78.5% relative efficient HPGe detector in theenergy range of 121.7e1408.0 keV by using in-house 152Eu calibration source. Then the measured efficienciesfor Marinelli geometry were compared with the results calculated by MEFFTRAN and ANGLEsoftwares for the validation. Although MEFFTRAN and ANGLE have two different efficiency transfer algorithmsto calculate the efficiencies, they usually need to use a reliable and accurate reference efficiencyvalues as input data. Hence, reference efficiency values were obtained experimentally from a multinuclide standard sourcefor the same detector- Marinelli geometry. In the present source characterization, the correctionsrequired for self-absorption and true coincidence summing effects for 152Eu gamma-rays were alsoobtained for a such close counting geometry condition. The experimental results confirmed the validityof efficiency calculations obtained by MEFFTRAN and ANGLE softwares that are calculation tools.

Investigation of the suitability of new developed epoxy based-phantom for child's tissue equivalency in paediatric radiology

Haluk Yücel,Aziz Safi 한국원자력학회 2021 Nuclear Engineering and Technology Vol.53 No.12

In this study, tissue equivalency (TE) of a newly developed epoxy-based phantom to 3e5 years child'stissue was investigated in paediatric energy range. Epoxy-based TE-phantoms were produced at differentglandular/adipose (G/A) ratios of 17/83%, 31/69%, 36/64% and 10/90%. A procedure was developed inwhich specific amounts of boron, calcium, magnesium, sulphur compounds are mixed with epoxy resin,together with other minor substitutes. In paediatric energy range of 40e60 kVp half-value layer (HVL)values were measured and then Hounsfield Units (HU) were determined from Computed Tomography(CT) scans taken in the X-ray energy range of 80-120kVp. It is found that radiation absorptionproperties of these phantoms in terms of the measured HVL values related to linear attenuation coefficients (m) are very well mimicking a 3 years child's soft tissue in case a ratio of 10/90%G/A. Additionally, the HU values of phantoms were determined from the CT scans. The HU ¼ 47.8 ± 4.8 value wasfound for the epoxy-based phantom produced at a ratio of 10/90%G/A. The obtained HVL and HU valuesalso support the suitability of the new epoxy based-phantom produced at a ratio of 10/90%G/A for asatisfactory mimicking a 3 years child's soft tissue by 5%. Thus they can have a potential use to performthe quality controls of medical X-ray systems and dose optimization studies

Extended Pelvic Lymph Node Dissection: Before or after Radical Cystectomy? A Multicenter Study of the Turkish Society of Urooncology

Haluk Ozen,Ozgur Ugurlu,Sumer Baltaci,Oztug Adsan,Guven Aslan,Cavit Can,Gurhan Gunaydin,Atilla Elhan,Yasar Beduk 대한비뇨의학회 2012 Investigative and Clinical Urology Vol.53 No.7

Purpose: We aimed to ascertain the effects of performing extended pelvic lymph node dissection (PLND) on the duration of surgery, morbidity, and the number of lymph nodes removed when the dissection was performed before or after radical cystectomy (RC). Materials and Methods: We used the database of our previous prospective multicenter study. A total of 118 patients underwent RC and extended PLND. Of the 118 patients, 48 (40.7%) underwent extended PLND before RC (group 1) and 70 (59.3%) underwent extended PLND after RC (group 2). The two groups were compared for extended PLND time, RC time, and total operation times, per operative morbidity, and the total numbers of lymph nodes removed. Results: Clinical and pathologic characteristics were comparable in the two groups (p>0.05). The mean RC time and mean total operation times were significantly shorter in group 1 than in group 2 (p<0.001). The mean number of lymph nodes removed was 27.31±10.36 in group 1 and 30.87±8.3 in group 2 (p=0.041). Only at the presacral region was the mean number of lymph nodes removed significantly fewer in group 1 than in group 2 (p=0.001). Intraoperative and postoperative complications and drain withdrawal time were similar in both groups (p=0.058, p=0.391, p=0.613, respectively). Conclusions: When extended PLND was performed before RC, the duration of RC and consequently the total duration of the operation were significantly shorter than when extended PLND was performed after RC. Practitioners may consider performing extended PLND before RC and rechecking the presacral area for additional lymph nodes after RC, particularly in elderly patients with high co-morbidity for whom the duration of surgery matters. Purpose: We aimed to ascertain the effects of performing extended pelvic lymph node dissection (PLND) on the duration of surgery, morbidity, and the number of lymph nodes removed when the dissection was performed before or after radical cystectomy (RC). Materials and Methods: We used the database of our previous prospective multicenter study. A total of 118 patients underwent RC and extended PLND. Of the 118 patients, 48 (40.7%) underwent extended PLND before RC (group 1) and 70 (59.3%) underwent extended PLND after RC (group 2). The two groups were compared for extended PLND time, RC time, and total operation times, per operative morbidity, and the total numbers of lymph nodes removed. Results: Clinical and pathologic characteristics were comparable in the two groups (p>0.05). The mean RC time and mean total operation times were significantly shorter in group 1 than in group 2 (p<0.001). The mean number of lymph nodes removed was 27.31±10.36 in group 1 and 30.87±8.3 in group 2 (p=0.041). Only at the presacral region was the mean number of lymph nodes removed significantly fewer in group 1 than in group 2 (p=0.001). Intraoperative and postoperative complications and drain withdrawal time were similar in both groups (p=0.058, p=0.391, p=0.613, respectively). Conclusions: When extended PLND was performed before RC, the duration of RC and consequently the total duration of the operation were significantly shorter than when extended PLND was performed after RC. Practitioners may consider performing extended PLND before RC and rechecking the presacral area for additional lymph nodes after RC, particularly in elderly patients with high co-morbidity for whom the duration of surgery matters.

Measurement of Photo-Neutron Dose from an 18-MV Medical Linac Using a Foil Activation Method in View of Radiation Protection of Patients

Yucel, Haluk,Cobanbas, Ibrahim,Kolbasi, Asuman,Yuksel, Alptug Ozer,Kaya, Vildan Korean Nuclear Society 2016 Nuclear Engineering and Technology Vol.48 No.2

High-energy linear accelerators are increasingly used in the medical field. However, the unwanted photo-neutrons can also be contributed to the dose delivered to the patients during their treatments. In this study, neutron fluxes were measured in a solid water phantom placed at the isocenter 1-m distance from the head of an18-MV linac using the foil activation method. The produced activities were measured with a calibrated well-type Ge detector. From the measured fluxes, the total neutron fluence was found to be $(1.17{\pm}0.06){\times}10^7n/cm^2$ per Gy at the phantom surface in a $20{\times}20cm^2$ X-ray field size. The maximum photo-neutron dose was measured to be $0.67{\pm}0.04$ mSv/Gy at $d_{max}=5cm$ depth in the phantom at isocenter. The present results are compared with those obtained for different field sizes of $10{\times}10cm^2$, $15{\times}15cm^2$, and $20{\times}20cm^2$ from 10-, 15-, and 18-MV linacs. Additionally, ambient neutron dose equivalents were determined at different locations in the room and they were found to be negligibly low. The results indicate that the photo-neutron dose at the patient position is not a negligible fraction of the therapeutic photon dose. Thus, there is a need for reduction of the contaminated neutron dose by taking some additional measures, for instance, neutron absorbing-protective materials might be used as aprons during the treatment.

Production of Bone Broth Powder with Spray Drying Using Three Different Carrier Agents

Ergezer Haluk,Kara Yeliz,Ö,zü,nlü,Orhan 한국축산식품학회 2018 한국축산식품학회지 Vol.38 No.6

The aim of this study is to determine the some physicochemical (proximate composition, pH and aw values) and reconstitution (wettability, dispersibility and solubility index (SI)) properties of spray-dried bone broth powder (BBP) along with the effects of the addition of different carrier agents. Subsequently, the powdered products were stored to determine the storage stability (pH, lipid oxidation, color, browning index) for 3 mon at –18℃. For this purpose, firstly marrow-containing bones (Os femur and Os humerus) have been boiled to get the bone broth. Three different emulsions were respectively prepared (1) 20% maltodextrin (MD) added BBP, (2) 20% whey powder isolate (WPI) added BBP and (3) 10% MD and 10% WPI added BBP and the emulsions were dried using a spray-dryer with 185℃ inlet and 95℃ outlet temperature. The proximate composition and reconstitution properties of BBP were found statistically different (p<0.05) depending on the use of different carrier agents. MD added BBP showed uniform and smooth morphology. The color, browning index, thiobarbituric acid reactive substances (TBARS) and pH values of BBP significantly changed (p<0.05) during storage. In conclusion, both the results of physicochemical and storage period analyses showed that the most suitable encapsulation material in the production of the bone broth powder is MD.