Analytical solutions of the Klein-Fock-Gordon equation with the Manning-Rosen potential plus a Ring-Shaped like potential

In this work, on the condition that scalar potential is equal to vector potential, the bound state solutions of the Klein-Fock-Gordon equation of the Manning-Rosen plus ring-shaped like potential are obtained by Nikiforov-Uvarov method. The energy levels are worked out and the corresponding normalized eigenfunctions are obtained in terms of orthogonal polynomials for arbitrary $l$ states. The conclusion also contain central Manning-Rosen, central and non-central Hulth\'en potential.Comment: 14 pages. arXiv admin note: substantial text overlap with arXiv:1210.537

Genetic Diversity in Citrus

WOS: 000403834500012

Pre-verbal focus in Turkish: An eye-tracking during reading study

International audienc

Letter from a Supporter in the Dominican Republic to Geraldine Ferraro

Letter from a supporter in the Dominican Republic to Geraldine Ferraro. Letter includes a Library of Congress translation.https://ir.lawnet.fordham.edu/vice_presidential_campaign_correspondence_1984_international/1301/thumbnail.jp

Determination of genetic relatedness among Turkish apple germplasm based on ISSR markers

Apple (Malus domestica Borkh) is the most economically important pome fruits worldwide and Turkey is within origin center of apple. In this research, inter-simple sequence repeat (ISSR) markers were used to determine relationships among the Turkish apple accessions and some selected foreign cultivars and species.  Fourteen ISSR primers produced a total of 111 fragments and 76 of them were polymorphic. The number of average polymorphic fragments per primer was 5.4. The mean polymorphism information content (PIC) was 0.37. The unweighted pair group method arithmetic average (UPGMA) analysis demonstrated that the accessions had a similarity range from 0.79 to 0.98. All accessions studied were discriminated and many subgroups were determined in the dendrogram based on the UPGMA analysis. High level of variation among the Turkish apples existed. Foreign cultivars, M.baccata, M. prunifolia and M. sylvestris accessions studied mix-clustered among the Turkish accessions. For sub-structuring Bayesian analysis, 71 loosely or uncorrelated markers with less than 10% missing data were used. This indicated absence of subpopulations, meaning well and equal introgression of genetic backgrounds or species available among the accessions. It can be concluded that Turkey was rich in apple genetic diversity, which may provide opportunity for apple breedind programs

Effect of Pruning on Diameter Growth in Pinus brutia Ten. Plantations in Turkey

Pruning is a technique used to add value to trees growing in forest stands, allowing the formation of clear, knot-free wood. Although many factors affect timber value, knots are the primary cause of reduction in timber quality of conifers. On the other hand, pruning may also cause reduction in the rate of tree growth, depending on pruning intensity.The aim of this study is to assess the effects of different pruning intensities on DBH (diameter at breast height) growth of young Pinus brutia plantations. For this purpose, three field experimental sites each with different site qualities, were established in three different locations. Four different treatments were applied at each test site: 1) control, no pruning of branches, 2) pruning up to 25% of tree height, 3) pruning up to 50% of tree height, and 4) pruning up to 75% of tree height. The effects of pruning on DBH growth were observed over a period of 14 years. At »Bük« test site, which has the poorest site quality, only those specimens pruned up to 75% of tree height showed significant reduction in DBH growth compared to the control. However, at »Nebiler« and »Kursunlu« test sites, specimens pruned both up to 50% and 75% of tree height showed statistically significant decrease in DBH growth. To recover from pruning stress in terms of DBH growth rate, it took trees 6 years at the poorest test site and 4 years at the relatively better test sites. This indicates that site quality of plantation sites accounts for not only DBH growth differences between sites, but also recovery rate of trees from any disturbances. Results showed that for those trees pruned up to 75% of their height, total DBH growth was reduced by between 6.5% and 9.0% after 14 years compared to the control at the test sites. No negative effect from pruning on DBH increment was observed in the first growing season. This may be due to earlier storage of nutrition in different parts of trees, thereby enabling them to compensate for the stress of crown reduction during the first growing season following pruning

ASSESSMENT OF POLLEN QUALITY OF SOME APRICOT AND CHERRY CULTIVARS

Stone fruits species are one of the most economically important fruits worldwide and Turkey. Turkey is the major producer country for apricot and cherry. Because of several problems (especially self-incompatibility) experienced in fertilization and fruit set, researches on pollen quality and fruit set may be essential. In present study, some pollen quality parameters of three apricot and three cherry cultivars were investigated. Apricot cultivars were ‘CasnaDrenova’, ‘Ninfa’ and ‘Beliana’, and cherry cultivars were ‘0900 Ziraat’, ‘Lapins’ and ‘Summit’. Pollen viability assessment was carried out using 1% 2, 3, 5 triphenyl tetrazolium chloride (TTC) test. Pollen germination capability was investigated with agar in petri method by using 1% agar and 15% sucrose. In apricot, the highest pollen germination level was obtained from ‘Casna Drenova’ with 38.63 %. The lowest germination level was assayed for ‘Beliana’. There are any significant differences in pollen viability of cherry cultivars. Pollen germination of cherry cultivars was generally low. ‘Lapins’ was the best cherry cultivar for pollen germination with 17.56%. On the other hand, ‘0900 Ziraat’ had the lowest value of pollen germination (7.01%). According to results, there was relatively high level of variation in pollen quality parameters of apricot and cherry cultivars