15 research outputs found
Is Einstein's equivalence principle valid for a quantum particle?
Einstein's equivalence principle in classical physics is a rule stating that the effect of gravitation is locally equivalent to the acceleration of an observer. The principle determines the motion of test particles uniquely (modulo very broad general assumptions). We show that the same principle applied to a quantum particle described by a wave function on a Newtonian gravitational background determines its motion with a similar degree of uniqueness
Centrifugal quantum states of neutrons
We propose a method for observation of the quasi-stationary states of
neutrons, localized near the curved mirror surface. The bounding effective well
is formed by the centrifugal potential and the mirror Fermi-potential. This
phenomenon is an example of an exactly solvable "quantum bouncer" problem that
could be studied experimentally. It could provide a promising tool for studying
fundamental neutron-matter interactions, as well as quantum neutron optics and
surface physics effects. We develop formalism, which describes quantitatively
the neutron motion near the mirror surface. The effects of mirror roughness are
taken into account.Comment: 13 pages, 10 figure
The effect of sodium content of dialysate on the level of catecholamines, aldosterone and plasma renin activity during the interdialysis period in patients undergoing haemodialysis
Chest reconstruction using a custom-designed polyethylene 3D implant after resection of the sternal manubrium
Joanna Lipińska,1 Leszek Kutwin,1 Marcin Wawrzycki,1 Leszek Olbrzymek,2 Sławomir Jabłoński1 1Department of Thoracic Surgery, General and Oncological Surgery, Medical University of Lodz, 2Ledo, Lodz, Poland Introduction: Resection of manubrium or body of the sternum is associated with a necessity of chest wall reconstruction. Large sternal defects require the use of different types of implants to ensure acceptable esthetic effect for the patient and chest stabilization. Aim: The purpose of this case report is to present a novel method of reconstruction of manubrium removed due to renal cancer metastasis to the sternum.Case: We present the case of a patient, who had underwent right nephrectomy for clear cell kidney cancer, diagnosed with a metastatic tumor in the sternum resulting in destruction of manubrium. The patient undergone tumor resection with primary reconstruction with an individual prosthesis. Sternal defect was filled with a personalized, computed tomography scan-based 3D-milled implant made of polyethylene.Results: Sternal reconstruction was uneventful. The patient endured surgery well, and has been under surveillance in outpatient clinic, without any respiration disorders, implant movement or local recurrence.Conclusion: Custom-designed sternal implants created by 3D technique constitute an interesting alternative for previous methods of filling defects after resection of a tumor in this location. Keywords: 3D-milled implant, thoracoplasty, reconstructive surgery, chest reconstruction, sternal metastasis, sternal implant, sternal tumor 
Effect of riluzole (Rilutek) treatment on plasma amino acid percentages in amyotrophic lateral sclerosis patients
Large plexiform neurofibroma on right thigh of a farmer in the course of Recklinghausen disease - Case report
A 59-year-old farmer was admitted to the Department of Trauma Surgery because of pain associated with the presence of a
tumour on the side of the right thigh. The patient stated that his biggest problem was great difficulty in moving and handling
agricultural machinery due to the aforementioned lesion. On physical examination, the patient presented with numerous
cutaneous and subcutaneous neurofibromas, as well as one large plexiform neurofibroma. Diagnosis of Neurofibromatosis
type 1 was established, based on National Institutes of Health diagnostic criteria. Moreover, molecular genetic testing found
known pathogenic mutation p.Arg1769* in one of the alleles of NF1 gene (heterozygote), typical for Recklinghausen disease.
The big plexiform neurofibroma in the patient was not operated on because of lung cancer