A simple chemical method for conversion of Turritella terebra sea snail into nanobioceramics

Yesim Muge Sahin,Zeynep Orman,Sevil Yucel 한양대학교 세라믹연구소 2018 Journal of Ceramic Processing Research Vol.19 No.6

In this study, a sea shell was converted into bioceramic phases at three different sintering temperatures (450 oC, 850 oC,1000 oC). Among the obtained bioceramic phases, a valuable β-TCP was produced via mechanochemical conversion methodfrom sea snail Turritella terebra at 1000 oC sintering temperature. For this reason, only the bioceramic sintered at 1000 oC wasconcentrated on and FT-IR, SEM/EDX, BET, XRD, ICP-OES analyses were carried out for the complete characterization ofβ-TCP phase. Biodegradation test in Tris-buffer solution, bioactivity tests in simulated body fluid (SBF) and cell studies wereconducted. Bioactivity test results were promising and high rate of cell viability was observed in MTT assay after 24 hoursand 7 days incubation. Results demonstrated that the produced β-TCP bioceramic is qualified for further consideration andexperimentation with its features of pore size and ability to support bone tissue growth and cell proliferation. This studysuggests an easy, economic method of nanobioceramic production.

Weather Conditions Drive the Damage Area Caused by Armillaria Root Disease in Coniferous Forests across Poland

Paweł Lech,Oksana Mychayliv,Robert Hildebrand,Olga Orman 한국식물병리학회 2023 Plant Pathology Journal Vol.39 No.6

Armillaria root disease affects forests around the world. It occurs in many habitats and causes losses in the infested stands. Weather conditions are important factors for growth and development of Armillaria species. Yet, the relation between occurrence of damage caused by Armillaria disease and weather variables are still poorly understood. Thus, we used generalized linear mixed models to determine the relationship between weather conditions of current and previous year (temperature, precipitation and their deviation from long-term averages, air humidity and soil temperature) and the incidence of Armillaria-induced damage in young (up to 20 years old) and older (over 20 years old) coniferous stands in selected forest districts across Poland. We used unique data, gathered over the course of 23 years (1987-2009) on tree damage incidence from Armillaria root disease and meteorological parameters from the 24-year period (1986-2009) to reflect the dynamics of damage occurrence and weather conditions. Weather parameters were better predictors of damage caused by Armillaria disease in younger stands than in older ones. The strongest predictor was soil temperature, especially that of the previous year growing season and the current year spring. We found that temperature and precipitation of different seasons in previous year had more pronounced effect on the young stand area affected by Armillaria. Each stand’s age class was characterized by a different set of meteorological parameters that explained the area of disease occurrence. Moreover, forest district was included in all models and thus, was an important variable in explaining the stand area affected by Armillaria.

Geotechnical Properties of Clayey Soils Stabilized with Marble Dust and Granulated Blast Furnace Slag

Ali Sinan Soğancı,Yavuz Yenginar,Ali Orman 대한토목학회 2023 KSCE Journal of Civil Engineering Vol.27 No.11

The stabilization of clayey soils is one of the most challenging areas of geotechnical engineers. In shallow and deep stabilization works, the most preferred materials are lime and cement. However, marble dust (MD) and granulated blast furnace slag (GBFS), which are more economical and environmentally friendly than these materials, are not commonly used. In the present study, the effect of MD and GBFS additives on improving the geotechnical properties of low and high plasticity clays was investigated. Various percentages of MD or GBFS (5-10-15 − 20%) were mixed into clayey soils. A series of experiments (compaction and unconfined compression tests) were performed on soil and soil-additive mixes and then their geotechnical properties were determined. When clayey soils are amended with MD or GBFS, the optimum moisture content decreases but bulk unit weight, maximum dry density, unconfined compressive strength depending on curing time increases. The optimum additive amount was 15% MD or 10% GBFS on CL soil and 10% MD or 15% GBFS on CH soils. In addition, the highest soil improvement ratio was achieved with 15% MD on CL soils and 15% GBFS on CH soils. The test results revealed that MD and GBFS can be utilized effectively to improve clay soils.

Effects of Supplemental Mannanoligosaccharides on Growth Performance, Faecal Characteristics and Health in Dairy Calves

Cagdas Kara,Huseyin Cihan,Mutlu Temizel,Serkan Catik,Yavuz Meral,Abdulkadir Orman,Artun Yibar,Hidir Gencoglu 아세아·태평양축산학회 2015 Animal Bioscience Vol.28 No.11

Twenty Holstein calves were used to investigate the effects of mannanoligosaccharides (MOS) supplementation in the whole milk on growth performance, faecal score, faecal pH, selected faecal bacterial populations and health during the preweaning period. Healthy calves selected by clinical examination were allocated to one of the two groups (control [CG] and experimental [EG]) at 5 days old. Each group consisted of 5 male and 5 female calves. Each calf in EG was supplemented with 7 g/d of a MOS product (Celmanax) from 5 days to 56 days of age. MOS supplement was mixed with the whole milk once in the morning and administered to the calves in EG via nipple bottle, whereas the calves in CG were fed the whole milk without MOS. Calves were weaned at 56 days of age. The final body weight, average daily weight gain (ADG) and average daily feed intake (ADFI) were statistically similar (p>0.05) but were higher by 3.70%, 6.66%, and 10.97%, respectively, in MOS than in control calves. Feed efficiency (ADG/ADFI) was also similar in two calves group. While faecal scores did not differ on day 5, 7, 14, 21, 28, 42, 49, and 56 between groups, EG had a higher faecal score (p = 0.05) than CG on day 35. Faecal concentration of Lactobacillus was lower (p<0.05) in EG compared with CG. No differences (p>0.05) in faecal concentrations of Bifidobacterium, Clostridium perfringens, and Escherichia coli were found between groups. Although there were no significant differences (p>0.05) in the incidence of diarrhoea, treatment days for diarrhoea and the costs associated with diarrhoea treatments between groups, collectively, the observed reductions in treatment days and the cost of diarrhoea treatments accompanying increases in final body weight, ADG and ADFI for EG may indicate potential benefit of MOS in treatment of diarrhoea.

Effects of Supplemental Mannanoligosaccharides on Growth Performance, Faecal Characteristics and Health in Dairy Calves

Kara, Cagdas,Cihan, Huseyin,Temizel, Mutlu,Catik, Serkan,Meral, Yavuz,Orman, Abdulkadir,Yibar, Artun,Gencoglu, Hidir Asian Australasian Association of Animal Productio 2015 Animal Bioscience Vol.28 No.11

Twenty Holstein calves were used to investigate the effects of mannanoligosaccharides (MOS) supplementation in the whole milk on growth performance, faecal score, faecal pH, selected faecal bacterial populations and health during the preweaning period. Healthy calves selected by clinical examination were allocated to one of the two groups (control [CG] and experimental [EG]) at 5 days old. Each group consisted of 5 male and 5 female calves. Each calf in EG was supplemented with 7 g/d of a MOS product (Celmanax) from 5 days to 56 days of age. MOS supplement was mixed with the whole milk once in the morning and administered to the calves in EG via nipple bottle, whereas the calves in CG were fed the whole milk without MOS. Calves were weaned at 56 days of age. The final body weight, average daily weight gain (ADG) and average daily feed intake (ADFI) were statistically similar (p>0.05) but were higher by 3.70%, 6.66%, and 10.97%, respectively, in MOS than in control calves. Feed efficiency (ADG/ADFI) was also similar in two calves group. While faecal scores did not differ on day 5, 7, 14, 21, 28, 42, 49, and 56 between groups, EG had a higher faecal score (p = 0.05) than CG on day 35. Faecal concentration of Lactobacillus was lower (p<0.05) in EG compared with CG. No differences (p>0.05) in faecal concentrations of Bifidobacterium, Clostridium perfringens, and Escherichia coli were found between groups. Although there were no significant differences (p>0.05) in the incidence of diarrhoea, treatment days for diarrhoea and the costs associated with diarrhoea treatments between groups, collectively, the observed reductions in treatment days and the cost of diarrhoea treatments accompanying increases in final body weight, ADG and ADFI for EG may indicate potential benefit of MOS in treatment of diarrhoea.

Hepatic and splenic sonographic and sonoelastographic findings in pulmonary arterial hypertension

İlhan Hekimsoy,Burçin Kibar Öztürk,Hatice Soner Kemal,Meral Kayıkçıoğlu,Ömer Faruk Dadaş,Gülgün Kavukçu,Mehmet Nurullah Orman,Sanem Nalbantgil,Sadık Tamsel,Hakan Kültürsay,Süha Süreyya Özbek 대한초음파의학회 2021 ULTRASONOGRAPHY Vol.40 No.2

Purpose: The aim of this study was to evaluate the associations of sonographic and sonoelastographic parameters with clinical cardiac parameters, as well as to assess their value in predicting survival in patients with pulmonary arterial hypertension (PAH). Methods: Thirty-six patients with PAH and normal liver function were prospectively enrolled in this prospective study along with 26 healthy controls, all of whom underwent ultrasound and point shear wave elastography examinations. Additionally, the portal vein pulsatility index (PVPI), inferior vena cava collapsibility index, and clinical cardiac variables were obtained in PAH patients. The values of hepatic (LVs) and splenic shear wave velocity (SVs) were compared between PAH patients and controls. The relationships between all sonographic and clinical parameters in the PAH patients were analyzed. Furthermore, their prognostic value in predicting survival was investigated. Results: LVs values in PAH patients (median, 1.62 m/s) were significantly higher than in controls (median, 0.99 m/s), while no significant difference was observed in SVs values. Patients with higher grades of tricuspid regurgitation (TR) had significantly different values of PVPI (P=0.010) and sonoelastographic parameters (P<0.001 for LVs and P=0.004 for SVs) compared to those with less severe TR. Tricuspid annular plane systolic excursion values were the only investigated parameter found to be associated with survival (hazard ratio, 0.814; 95% confidence interval, 0.694 to 0.954; P=0.011). Conclusion: Our results demonstrated a direct association between cardiac congestion (i.e., the severity of TR) and liver stiffness, which should be kept in mind during the assessment of fibrosis in patients with PAH.