This objective of the study was to develop a model for the determination of N deficiency in cherry trees using a combination of visible near infrared methods and spectro-radiometric measurement.In our experimental des...This objective of the study was to develop a model for the determination of N deficiency in cherry trees using a combination of visible near infrared methods and spectro-radiometric measurement.In our experimental design,cherry seedlings were grown under various N deficiency conditions in nutrient-controlled containers.The reflectance values of plant leaves were measured using a spectro-radiometer.Plant leaves samples were simultaneously collected.Their nutrient contents were determined in the laboratory.Afterwards,we performed a statistical comparison of the reflectance values.Sample analysis results established the significant wavelengths.Moreover,we received accurate regression models for predicting N deficiency in cherry leaves that were grown in nutrient solutions.Next,we verified the model validity by measuring the reflectance of the leaves collected from cherry orchards at various locations using a spectroradiometer.Nutrient deficiencies were calculated using the developed model,and then,the predicted and measured data were compared to evaluate model validity.From these results,we determined the wavelengths that yielded the most accurate results for N prediction,selected from the blue and green regions of the spectrum.We established that for N prediction in cherry trees,the simplest model can be created using 560and 570nm wavelengths.However,the evaluated model can be applicable only under certain conditions.We concluded that in order to develop aprediction method with sufficient application capacity,as well as the ability to assess nutritional and physiological characteristics,the ecology condition of the plant should be properly considered based on the model.展开更多
The authors report a rare case of a barotraumatic pneumothorax and pneumomediastinum associated with esoph-ageal perforation and orbital emphysema. A 4-year-old boy presented with sudden respiratory distress after blo...The authors report a rare case of a barotraumatic pneumothorax and pneumomediastinum associated with esoph-ageal perforation and orbital emphysema. A 4-year-old boy presented with sudden respiratory distress after blowout of a defective tire that he bit. Computed tomography scan showed right pneumothorax and bilateral orbital emphysema. A linear rupture has been detected in the cervical esophagus in esophagoscopy. Stamm gastrostomy and tube thoracostomy were performed,and broadspectrumantibiotics have been introduced. Oral feeding started 23 days after blowout of tire, and the patient was discharged 50 days after injury.展开更多
Background. The role of oxidative stress has not been fully understood in the aetiopathogenesis of vitiligo in different studies. Aim. We aimed to investigat e the role of the oxidative stress in the pathogenesis of v...Background. The role of oxidative stress has not been fully understood in the aetiopathogenesis of vitiligo in different studies. Aim. We aimed to investigat e the role of the oxidative stress in the pathogenesis of vitiligo. Methods. In this study, we examined levels of superoxide dismutase, glutathione peroxidase, malondialdehyde and nitric oxide in tissue of 25 patients with generalized vitil igo and 25 healthy controls. Results. Our results revealed that levels of supero xide dismutase, glutathione peroxidase and malondialdehyde in tissue were signif icantly increased in patientswith generalized vitiligo (P < 0.05). However, ther e was no statistically significantly difference between two groups at tissue lev el of nitric oxide (P > 0.05). Conclusion. Our results demonstrate the presence of an imbalance in the oxidant-antioxidant system in vitiligo at tissue level and provide further support for a free radical-mediated damage as an initial p athogenic event in melanocyte degeneration in vitiligo.展开更多
基金The Scientific and Technical Research Council of Turkey,Agriculture,Forestry&Veterinary Research Grant Committee Project No TOVAG 109O376
文摘This objective of the study was to develop a model for the determination of N deficiency in cherry trees using a combination of visible near infrared methods and spectro-radiometric measurement.In our experimental design,cherry seedlings were grown under various N deficiency conditions in nutrient-controlled containers.The reflectance values of plant leaves were measured using a spectro-radiometer.Plant leaves samples were simultaneously collected.Their nutrient contents were determined in the laboratory.Afterwards,we performed a statistical comparison of the reflectance values.Sample analysis results established the significant wavelengths.Moreover,we received accurate regression models for predicting N deficiency in cherry leaves that were grown in nutrient solutions.Next,we verified the model validity by measuring the reflectance of the leaves collected from cherry orchards at various locations using a spectroradiometer.Nutrient deficiencies were calculated using the developed model,and then,the predicted and measured data were compared to evaluate model validity.From these results,we determined the wavelengths that yielded the most accurate results for N prediction,selected from the blue and green regions of the spectrum.We established that for N prediction in cherry trees,the simplest model can be created using 560and 570nm wavelengths.However,the evaluated model can be applicable only under certain conditions.We concluded that in order to develop aprediction method with sufficient application capacity,as well as the ability to assess nutritional and physiological characteristics,the ecology condition of the plant should be properly considered based on the model.
文摘The authors report a rare case of a barotraumatic pneumothorax and pneumomediastinum associated with esoph-ageal perforation and orbital emphysema. A 4-year-old boy presented with sudden respiratory distress after blowout of a defective tire that he bit. Computed tomography scan showed right pneumothorax and bilateral orbital emphysema. A linear rupture has been detected in the cervical esophagus in esophagoscopy. Stamm gastrostomy and tube thoracostomy were performed,and broadspectrumantibiotics have been introduced. Oral feeding started 23 days after blowout of tire, and the patient was discharged 50 days after injury.
文摘Background. The role of oxidative stress has not been fully understood in the aetiopathogenesis of vitiligo in different studies. Aim. We aimed to investigat e the role of the oxidative stress in the pathogenesis of vitiligo. Methods. In this study, we examined levels of superoxide dismutase, glutathione peroxidase, malondialdehyde and nitric oxide in tissue of 25 patients with generalized vitil igo and 25 healthy controls. Results. Our results revealed that levels of supero xide dismutase, glutathione peroxidase and malondialdehyde in tissue were signif icantly increased in patientswith generalized vitiligo (P < 0.05). However, ther e was no statistically significantly difference between two groups at tissue lev el of nitric oxide (P > 0.05). Conclusion. Our results demonstrate the presence of an imbalance in the oxidant-antioxidant system in vitiligo at tissue level and provide further support for a free radical-mediated damage as an initial p athogenic event in melanocyte degeneration in vitiligo.
