Influence of gamma irradiation on pollen viability, germination ability, and fruit and seed-set of pumpkin and winter squash

The influence of irradiation dose (50, 100, 200 and 300 Gray), irradiation time (July 9th, 11th, 15th, 21st and 28th) and pollen age (0th and 1st days) on the pollen viability, germination ability and fruit and seed-setwere investigated in pumpkin (Cucurbita moschata Duchesne ex Poir.) and winter squash (Cucurbita maxima Duchesne ex Lam.). Along with increasing of irradiation dose, irradiation period and pollen age, pollen viability, germinability and fruit and seed-set decreased, significantly. Irradiated and nonirradiated pollens maintained their viability for 1 - 4 days and 4 - 7 days, respectively. Non-irradiated pollens of winter squash were germinated for 2 days and produced the highest germination rate (22.6 and 22.9%) on July 9th and 11th, respectively. Moreover, irradiated pollens were germinated for 2 days at 50 Gray (1.1 - 8.5%) and for one day at 100 Gray (0.6 - 10.4%). On July 9, the fruit-set rate ranged from75.0% (at 50 Gray) to 63.0% (at 100 Gray) by pollination with 0th day pollens in winter squash. Pollination with irradiated pollens at 50 Gray and 100 Gray gave both seeded and seedless fruits depending on irradiation periods. All fruits obtained from pollinations with non-irradiated pollens were seeded. Although irradiated pollens at 200 Gray and 300 Gray were not germinated in medium, they gave fruit more or less, but fruits were seedless. The highest fruit-set rates were determined 75.0% (57SI21) inwinter squash and 26.3 (55BA01) in pumpkin, pollination with 0th day old pollens. In all irradiation times, the percentage of fruit and seed-set of pumpkin was lower than that of winter squash

Modelling the effect of temperature on seed germination in some cucurbits

The prediction of germination percentage (GP) and germination speed (GS) of the seeds for some cucurbits (watermelon, melon, cucumber, summer squash, pumpkin and winter squash) was investigated by mathematical model based on temperature. The model, D = [a - (b x T) + (c x T2)] of Uzun et al. (2001), was adapted to predict both the GP and GS in relation to 12 different temperatures, namely 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42 and 45°C. In addition, optimum temperature (To = - b / 2 x c) for GP and GS were calculated by using the coefficients obtained from the regression models developed. Observed and predicted optimum temperature (To) for GP and GS varied among species and cultivarsand strong correlations were established between observed and predicted GP and GS based on temperature. The predicted To ranged from 21.6°C (summer squash, pop. Urfa) to 27.8°C (watermelon, cv. Amazon F1) for GP and from 25.5°C (winter squash) to 30.4°C (melon, cv. Hasanbey-1) for GS. These results indicated that predictions based on this mathematical model were highly reliable and that it could be confidently used to predict GP and GS for the evaluated cucurbits

Relationship of coronary collateral development with mean arterial pressure in patients with stable coronary artery disease

Aim: The prognostic value of blood pressure and the association between these parameters and cardiovascular conditions have been established in literature. In this study, we aimed to investigate the correlation between peripheral blood pressure parameters with degree of coronary collateral development (CCD) in stable coronary artery disease (CAD) subjects with established critical artery stenosis. Methods: A total of 363 patients with stable angina pectoris undergoing coronary arteriography were enrolled and divided on the basis of the development of CCD into two groups: group with adequate CCD (n=120) and group with inadequate CCD (n=243). Peripheral blood pressure parameters were evaluated before coronary arteriography. Results: Peripheral diastolic blood pressure (DBP) and mean arterial pressure (MAP) levels were significantly higher in the inadequate CCC group (81.5±10.7 vs 77.9±9.9 p=0.02 and 100.6±11.8 vs 96.6±9.3 <.001). In Pearson’s correlation analysis revealed that, Peripheral DBP and MAP levels were significantly correlated with Rentrope Collateral Grading (r= 0.26, p<0.003 and r=0.29, p<0.001, respectively). ROC curve analysis of MAP and DBP for prediction of inadequate. At the cut-off value of > 99,8mmHG, sensitivity and specificity of MAP were 57% and 69%, respectively. At the cut-off value of >79,5 mmHg, sensitivity and specificity of DAP were 72% and 42%, respectively. Conclusion: The present study suggests that Peripheral DBP and MAP levels may be associated with degree of collateral development in chronic stable CAD. Low peripheral DBP and MAP in the case of severe coronary stenosis in stable CAD may be an important stimulus for coronary collateral development

A review of cardiovascular disease induced by radiation

Cardiovascular diseases are still in the 1st place in the world among cause of deaths. Data accumulates about publications investigating the effect of radiation on cardiovascular disease. Ionized radiation is used for diagnosis and treatment of many disease, recently. As for invasive cardiology; coronary artery disease, cardiac valve diseases, electrophysiological studies require radiation assistance.  It is very important for invasive cardiologists to know the cardiovascular adverse effects of radiation and radiation protection methods

The phenotypic diversity and fruit characterization of winter squash (Cucurbita maxima) populations from the Black Sea Region of Turkey

Winter squash are one of the most important Cucurbit crops in Turkey. Winter squash populations show great diversity in morphological characteristics, particularly fruit length, fruit diameter, fruit shape, fruit brightness, skin thickness , flesh thickness and colour in the Black Sea region of Turkey. In this research, 115 populations of winter squash, Cucurbita maxima Duch, were collected from different provinces of the Black Sea region in 2006 and 2007 and phenotypic diversity in their fruit characters was assessed. The collection showed appreciable phenotypicvariation in fruit shape, fruit colour, fruit brightness, fruit dimension and fruit weight. Cluster and principal component analysis (PCA) were performed to determine relationships among populations and to obtain information on the usefulness of those fruit characters for the definitionof groups. Cluster analysis based on 14 quantitative and 7 qualitative variables identified 10 different groups. The first five principal component axes accounted for 65.0% of the total multivariate variation among the populations. The greater part of variance was accounted for byfruit weight, fruit diameter, fruit length, length of seed cavity and flesh thickness. This evaluation of fruit trait variability can assist geneticists and breeders to identify populations with desirable characteristics for inclusion in variety breeding programs

Comparison of platelet volume indices in acute coronary syndrome

Aim: To compare the parameters showing the platelet volume index in unstable angina pectoris (USAP), non-ST elevation myocardial infarction (non-STEMI) and ST elevation myocardial infarction (STEMI). Methods: The platelet volume indices of 94 USAP, 161 non-STEMI and 86 STEMI cases with a total of 341 patients (245 men, 96 women) were compared. The patients between March 2015 and October 2018 who admitted to Bolu Abant İzzet Baysal University Hospital with the diagnosis of acute coronary syndrome were compared using platelet distribution width (PDW), PDW to platelet ratio (PPR), mean platelet volume (MPV), MPV to platelet ratio (MPR). Results: No significant difference was found between the 3 groups in terms of PDW (p = 0.26), PPR (p = 0.87), MPV (p = 0.41) and MPR (p = 0.78) values. Conclusion: In our study, there was no statistically significant difference between the types of acute coronary syndrome and platelet volume indices

Evaluation of electrocardiographic ventricular repolarization parameters in stable coronary artery disease

Aim: To examine the relationship between the SYNTAX score (SS) and cardiac repolarization parameters such as cQTd and Tp-e values, and Tp-e/QT, Tp-e/JT, Tp-e/QTc, and Tp-e/JTc ratios in patients who have stable angina pectoris. Methods: 12-lead resting electrocardiograms (ECGs) and SS of 160 patients (51 female and 109 male) undergoing coronary angiography with the pre-diagnosis of stable angina pectoris were evaluated. Patients with a SS below 22 were classified as Group 1 (low-SYNTAX), and those above 22 (high-SYNTAX) as Group 2. Forty-four patients with normal coronary angiography were included in Group 3. Results: Mean age of the patients was 62.4±9.1 years. The heart rate, QRS, QT, cQT and JT durations between the groups were similar. In addition, relatively recent ventricular repolarization indices such as Tp-e interval and Tp-e/QT, Tp-e/JT, Tp-e/QTc, and Tp-e/JTc ratios were also not substantially different between groups. Conclusion: Several surface ECG predictors of ventricular arrhythmias, including QTd, JT and Tp-e intervals and their ratios to QT and JT, are not significantly correlated with SYNTAX score-assessed CAD severity in patients with stable angina pectoris

The effects of surface treatment on optical and vibrational properties of stain-etched silicon

The effects of surface treatment on optical and vibrational properties of porous silicon. (por-Si) layers grown on p-type Si wafers by electroless etching technique were studied by FTIR spectroscopy and photoluminescence (PL). The results indicate a correlatiora between the PL intensity and the strength of the absorption bands induced by mulltihydride complexes (SiHn, n ≥ 2). However, similar correlation was also established for monohydride species as evidenced from the layers containing no multihydrides. Furthermore, a new band is observed at 710 cm-1 and assigned to multihydrides suggesting a ne it, local bonding environment in these layers. © 1995

Influencia de un injerto en el perfil de ácidos grasos y algunas propiedades fisicoquímicas de la semilla y el aceite de semillas de sandía

This study aimed to investigate the effects of grafting on the fatty acid profile and some physicochemical properties of watermelon seed and seed oil. The ‘Crimson Tide’ cultivar was used as the scion while two wild watermelon (Citrullus lanatus var. citroides (A1 and A2)), one Lagenaria siceraria (A3) and one Cucurbita maxima Duchesne x Cucurbita moschata Duchesne (A4) were used as rootstocks. The use of rootstock significantly influenced the fatty acid profile and the physical parameters of seeds and seed oils. The highest linoleic acid ratio was found in the seed oil from A1 and A2, the oil from A3 had the highest oleic acid ratio. The results showed that the content and acid value in seed oils were improved, and that total phenolic compounds and antioxidant activity of both seed and oil were decreased by grafting. Wild rootstocks can be used in watermelon cultivation to obtain a watermelon seed which is rich in linoleic acid.El objetivo de este estudio fue investigar los efectos del injerto en el perfil de ácidos grasos y algunas propiedades fisicoquímicas de la semilla y el aceite de semillas de sandía. El cultivar ‘Crimson Tide’ se utilizó como vástago, mientras que dos sandías silvestres (Citrullus lanatus var. Citroides (A1 y A2)), una Lagenaria siceraria (A3) y una Cucurbita maxima Duchesne x Cucurbita moschata Duchesne (A4) se utilizaron como portainjertos. El uso de portainjertos influyó significativamente en el perfil de ácidos grasos y los parámetros físicos de semillas y aceites de semillas. La proporción de ácido linoleico más alta se encontró en el aceite de semillas de A1 y A2, el aceite de A3 tuvo la proporción de ácido oleico más alta. Los resultados mostraron que el contenido de aceite y el índice de acidez mejoró y los compuestos fenólicos totales y la actividad antioxidante tanto de la semilla como del aceite se redujeron mediante el injerto. Para obtener un aceite de semillas de sandía rico en ácido linoleico, se pueden utilizar portainjertos silvestres en el cultivo de sandía