Investigation of phase-equivalent potentials by a halo transfer reaction

Using the supersymmetric quantum mechanics we investigate the wave function-sensitive properties of the supersymmetric potentials which have received a lot of attention in the literature recently. We show that a superdeep potential and its phase-equivalent shallow-partner potential give very similar "rms" values for the weakly bound systems such as the deuteron and 11Be nuclei. Although the corresponding eigenstates differ in the node-number, our investigation on the 11Be(p,d)10Be single nucleon halo transfer reaction at 35 MeV show that also other physical quantities such as the cross section angular distributions calculated using these wave functions reflect the nodal structure rather weakly. This lends support to two nearly equivalent treatments of the Pauli principle.Comment: 20 pages article in LaTEX (uses standard article.sty). Figures can be obtained from author(s). Please check "http://www1.gantep.edu.tr/~ozer" for other studies of Nuclear Physics Group at University of Gaziante

Growth and Superconductivity of Pb and Pb-Bi Alloys in the Quantum Regime

Superconductivity is a collective quantum phenomenon that is inevitably suppressed in reduced dimensionality. Questions of how thin superconducting wires or films can be before they lose their superconducting properties have important technological ramifications and go to the heart of understanding formation, coherence, and robustness of the superconducting state in quantum confined geometries. Suppression of superconductivity in low dimensions is usually attributed to thermal or quantum fluctuations, or to pair-breaking Coulomb interactions in the presence of strong disorder. Control and quantification of a film’s disorder length scale remained a critical experimental obstacle, however. Here, we exploit quantum confinement of itinerant electrons in a soft metal (Pb), to stabilize atomically-flat superconductors with lateral dimensions of the order of a few millimeters and vertical dimensions of only a few atomic layers. These extremely thin superconductors show no indication of defect- or fluctuation-driven suppression of superconductivity and sustain macroscopic super- currents of up to ~10% of the theoretical depairing current density. The extreme hardness of the critical state can be attributed to the presence of intrinsic vortex traps that are stabilized by quantum confinement. We furthermore show that the quantum growth and superconductive properties of the films can be tailored by Fermi surface engineering via controlled alloying. The present study paints a conceptually appealing, elegant picture of a model nano-scale superconductor with calculable critical state properties. It furthermore indicates the intriguing possibility of achieving and exploiting superconductivity in the ultimate low-dimensional limit

The role of lymphocyte-monocyte ratio and platelet to lymphocyte ratio in predicting risk groups in gastrointestinal stromal tumors

Aim: Gastrointestinal stromal tumors (GIST) are the most common mesenchymal tumors of the gastrointestinal tract. Armed Forces Institute of Pathology (AFIP) criteria which is the basis of our study, is also known as Miettinen’s criterion is used in classification of GIST. Lymphocyte-monocyte ratio (LMR), and platelet lymphocyte ratio (PLR) have been shown as novel markers in chronic systemic inflammatory response, therefore, we aimed to study LMR levels of the subjects with moderate to high risk GIST and to compare to those in the subjects with low or very low risk GIST. Methods: Thirty GIST patients who underwent surgery were retrospectively evaluated. Patients were divided into two groups according to the AFIP risk scoring system: the first group (group 1) included very low and low risk patients and the second group (group 2) included moderate and high risk patients. Inflammatory indicators; LMR and PLR of the groups were compared. Results: LMR value was higher in Group 1 (5.25 ± 2.55) than the LMR of group 2 (2.92 ± 1.76). PLR value was significantly lower in group 1 (139.68) compared to the PLR of group 2 (185.04). Conclusion: We think that LMR is effective in identifying low and very low risk patients compared to AFIP. From this point of view, we suggest that LMR can identify high and medium risk patients by excluding low and very low risk patients and may be an independent risk factor in GIST scoring systems

Lymphadenectomy in Muscle Invasive Bladder Cancer

Bladder cancer is the second most common genitourinary malignancy with urothelial cancer comprising nearly 90% of primary bladder tumors. Urothelial carcinoma of the urinary bladder is the fifth most common malignancy in the United States, with an estimated 76,960 new cases and 163,900 deaths in 2016. Radical cystectomy with lymph node dissection remains the standard treatment for patients with muscle-invasive urothelial carcinoma of the bladder, and also for nonmuscle-invasive disease, refractory to intravesical therapy. The current approaches to pelvic lymph node dissections are based on the removal of lymph nodes most commonly harboring metastatic disease, notably the external iliac, obturator, and hypogastric lymph nodes. The boundaries for a standard pelvic lymph node dissection generally include the bifurcation of the common iliac vessels superiorly and the genitofemoral nerve laterally. Extended pelvic lymph node includes the removal of lymph nodes between the bifurcation of the common iliac vessels and the level of the aortic bifurcation, sometimes including distal aortic and caval nodes up to the level of the inferior mesenteric artery, as well as presacral nodes. Extended and superextended dissection has been reported to be associated with superior survival outcome

Topology optimization of double-curved double-layer grids

A topology optimization procedure for double layer grids which have square-on-square configuration and top and/or bottom layers are curved in one or two directions is presented. The number of nodes is treated as design variables during optimization process; as a result, the number of members varies. The configuration of grid structures is generated using the graph product operations. The coordinates of nodes and the cross sections of members are taken as continuous and discrete design variables, respectively. As an optimizer, a new swarm based optimization algorithm called Artificial Bee Colony algorithm is used. A design example is included to show the applicability of the presented procedure for optimization of double-curved double-layer grids

Minimally invasive surgery in primary hyperparathyroidism

Aim:  To describe the general and laboratory characteristics of patients with primary hyperparathyroidism (PHPT) who underwent surgery in our clinic, as well as surgery-related morbidity. Methods: The study population were selected: Patients with clinical and radiological diagnosis of PHPT were included in the study. Minimal invasive parathyroid surgery, aimed only the affected gland, was chosen for the patients. Preoperative calcium (Ca), parathyroid hormone (PTH), and postoperative Ca and PTH levels were recorded. Preoperative sonography and scintigraphy studies to determine localization were obtained from the same database. Results: 116 patients were undergone minimal invasive surgery for hyperparathyroidism, which is mainly focused on the pathological gland. The mean preoperative PHT was 397 ng/L and postoperative PTH was 53 ng/L. Preoperative and postoperative Ca levels were 11.7 mg/dL and 9.3 mg/dL, respectively. Histopathological evaluation revealed following results: 108 patients had adenoma. None of the subjects had malignancy. The mortality rate was 0% and the morbidity was 1.7%, related to this procedure. Conclusion: According to the data in present study, we suggest that minimally invasive surgical techniques should be preferred in sake of higher success and lower postoperative morbidity in patients with a single gland disease

Cholelithiasis and gastrointestinal cancer: Is there a relationship that increases the risk of developing cancer?

Aim: To investigate the co-existence of cholelithiasis in patients with gastrointestinal (GI) cancer both in preoperative and postoperative periods. Methods: We retrospectively analyzed the data of patients who underwent GI tract cancer surgery in the general surgery clinic of a university hospital between January 2013 and December 2019 for the presence of 'cholelithiasis' in the preoperative and postoperative periods. Age, gender, tumor type and localization and presence of the cholelithiasis in the patients were determined. In addition, the cases were divided into two as upper GI tract and lower GI tract according to tumor location and the relationship with cholelithiasis was evaluated. Results: A total of 680 GI cancer patients were included in the study. Localization of GI cancers were; colon in 211 cases (31%), rectum in 195 cases (28.7%), gastric in 187 cases (27.5%), periampullary region in 55 cases (8.1%), and small intestine in 32 cases (4.7%). In the preoperative period, 69 (10.1%) patients were associated with cholelithiasis. Thirty-one (5.1%) patients had accompanying cholelithiasis in the postoperative period. Coexistence of cholelithiasis according to cancer location was not statistically significant in the preoperative and postoperative periods. Conclusions: Our available data make it difficult to distinguish the roles of cholelithiasis on gastrointestinal cancers, because no statistically causal relationship was found between cholelithiasis and gastrointestinal cancers. However, the role of asymptomatic and symptomatic stones, which may or may not require cholecystectomy, in the development of GI tract cancers should not be ignored

Usefulness of endovascular stent-graft for combination with a strict aort coarctation and patent ductus arteriosus for an adult patient: a case report

We reported a 21-year-old patient with strict descending aorta coarctation and small post-ductal patent ductus arteriosus, complicated with abortion and hypertension. The patient was successfully treated by endovascular stent-graft with a single cardiac catheterization. Endovascular stent-graft is an easy, safe, and reliable intervention for the treatment of strict descending aorta coarctation and small post-ductal patent ductus arteriosus