Measuring Nuclear Spin Dependent Parity Violation With Molecules: Experimental Methods and Analysis of Systematic Errors

Nuclear spin-dependent parity violation (NSD-PV) effects in atoms and molecules arise from $Z^0$ boson exchange between electrons and the nucleus, and from the magnetic interaction between electrons and the parity-violating nuclear anapole moment. It has been proposed to study NSD-PV effects using an enhancement of the observable effect in diatomic molecules [D. DeMille $\textit{et al.}$, Phys. Rev. Lett. $\textbf{100}$, 023003 (2008)]. Here, we demonstrate measurements of this type with sensitivity surpassing that of any previous atomic PV measurement, using the test system ${^{138}\mathrm{Ba^{19}F}}$. We show that systematic errors associated with our technique can be suppressed to at least the level of the present statistical sensitivity. With $\sim\!170$ hours of data, we measure the matrix element, $W$, of the NSD-PV interaction with uncertainty $\delta W/(2\pi)<0.7$ Hz, for each of two configurations where $W$ must have different signs. This sensitivity would be sufficient to measure NSD-PV effects of the size anticipated across a wide range of nuclei.Comment: 25 pages, 15 figures, This longer article provides more details about our experimental techniques, measurement methods and analysis of the systematic uncertainty described briefly in the short version in arXiv:1801.0531

Weak-Measurement-Induced Heating in Bose-Einstein Condensates

Ultracold atoms are an ideal platform for understanding system-reservoir dynamics of many-body systems. Here, we study quantum back-action in atomic Bose-Einstein condensates, weakly interacting with a far-from resonant, i.e., dispersively interacting, probe laser beam. The light scattered by the atoms can be considered as a part of quantum measurement process whereby the change in the system state derives from measurement back-action. We experimentally quantify the resulting back-action in terms of the deposited energy. We model the interaction of the system and environment with a generalized measurement process, leading to a Markovian reservoir. Further, we identify two systematic sources of heating and loss: a stray optical lattice and probe-induced light assisted collisions (an intrinsic atomic process). The observed heating and loss rates are larger for blue detuning than for red detuning, where they are oscillatory functions of detuning with increased loss at molecular resonances and reduced loss between molecular resonances.Comment: 13 pages, 8 figures. arXiv admin note: text overlap with arXiv:2209.0440

Comparing extracorporeal shock wave and hyaluronic acid in a rabbit cartilage defect model: the effects of ESW on cartilage defect

Aim: To compare the efficiency of extracorporeal shock wave (ESW) treatment with hyaluronic acid (HA) viscosupplementation in an experimental rabbit cartilage defect model. Materials and methods: A total of 24 New Zealand rabbits were randomly divided into 4 groups: HA, ESW, ESW + HA, and control. Chondral defects were created in the left knees of the rabbits. HA viscosupplementation was performed on the HA and ESW + HA groups, and after 24 h, 0.16 mJ/mm2 ESW was performed on the ESW and ESW + HA groups. After an 8-week follow-up, the rabbits were sacrificed and histopathological examination of the defects was carried out. In addition, immunohistochemistry was performed by the avidin-biotin peroxidase method using vascular endothelial growth factor (VEGF), transforming growth factor beta 1 (TGF-beta 1), and type II collagen antibodies, and the results were evaluated semiquantitatively. Results: There was a significant difference between the control group and the ESW group in terms of Pineda score and type II collagen expression; between the control group and the HA group in terms of Pineda score, VEGF expression, type II collagen expression, and TGF-beta 1 expression; and between the control group and the ESW + HA group in terms of Pineda score, VEGF expression, type II collagen expression, and TGF-beta 1 expression. Conclusion: The results show that both treatment methods have positive therapeutic effects on the articular cartilage defect model in terms of the parameters studied.Cumhuriyet University Scientific Research Projects (CUBAP) Project [T-421]The present study was supported by Cumhuriyet University Scientific Research Projects (CUBAP) Project no T-421

Venous leg symptoms in migraineurs: a potential clue on the pathophysiology of migraine

BACKGROUND: Migraine is a neurovascular disorder which cerebral venous congestion might have role in pathogenesis. The objective was to assess the association between venous disease and migraine by using the Venous Insufficiency Epidemiological and Economic Study-Quality of Life/Symptoms (VEINES-QoL/Sym) questionnaire in migraineurs and non-migraineurs. METHODS: The study was designed as a non-randomized, prospective cohort study and consisted of patients diagnosed with migraine and age-, sex- matched healthy subjects without migraine. All participants were examined for the presence of chronic venous disease (CVD). VEINES-Sym questionnaire was applied to assess venous symptoms. The Migraine Disability Assessment (MIDAS) questionnaire was used to assess the severity of disease in migraineurs. RESULTS: Participants were classified into two groups as migraine-positive group (N.=130) and migraine-negative group (N.=130). Migraine patients and control group were comparable in terms of clinical status and demographic parameters. Total VEINES-Sym score was lower in patients with migraine compared to control group (34.4 +/- 8.7, 37.6 +/- 8.12, P=0.003, respectively). Additionally, there was a significant negative correlation between VEINES-Sym score and total MIDAS disability score (r=-0.33, P<0.001) and MIDAS severity levels (little or no, mild, moderate, severe) (r=-0.266, P=0.003) of the migraineurs. Logistic regression analysis revealed that VEINES-Sym score is an independent and statistically significant associate of migraine (OR=0.95, 95% CI:0.92-0.98, P=0.001). CONCLUSIONS: We have documented an independent association between migraine and VEINES-Sym score indicating possible pathophysiological link between migraine and CVD. Further studies are warranted to figure out the pathophysiological associations between migraine and venous vascular pathology and peripheral varicose vein

Biocompatibility evaluation of cigarette and carbon papers used in repair of traumatic tympanic membrane perforations: experimental study

The purposes of this study were to investigate the biocompatibility of two different paper patches (carbon and cigarette papers) and compare the adhesion and proliferation features of L929 fibroblast cells by using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT Test) test and scanning electron microscopy (SEM). In this study, time-dependent cytotoxic effects of cigarette and carbon papers used in repairing small traumatic TM perforations were investigated in vitro by using MTT test. And also adhesion and spreading of cells over disk surface were observed by SEM. Cytotoxicity test carried out by MTT analysis on leakage products collected from two types of paper patches at the end of 24 and 48 h revealed no cytotoxicity (P > 0.05). In SEM studies, it was observed that cells started to proliferate over disk surface as a result of 48-h incubation, and SEM revealed that the cell proliferation over cigarette paper was more compared to the one over carbon paper. We believe that this is the first study where biocompatibility and adhesion features of carbon and cigarette paper have been studied by using L929 fibroblast cell culture. As a result, biocompatibility of cigarette paper and also whether cigarette paper was superior to carbon paper in cell attachment and biocompatibility were studied. It was found, by MTT test and SEM test, that cigarette paper had a higher biocompatibility and cell attachment, and thus cigarette paper should be the patch to be preferred in cases where TM perforations are repaired by paper-patch method

Dermatochalasis: A potential risk factor for cardiovascular diseases

To examine the cardiac parameters of patients with dermatochalasis by echocardiography to analyze whether there is a relationship between dermatochalasis and cardiac disorders. This prospective comparative study included 132 (57 male, 75 female) patients with dermatochalasis with an average age of 47.09±9.53 years and 77 (34 male, 43 female) healthy controls with an average age of 47.31±4.23 years. Each participant was examined by 2-dimensional, M-mode, and color-flow Doppler, pulsed-wave (PW) Doppler, and tissue Doppler imaging (TDI) echocardiography. In patients with dermatochalasis, PW Doppler transvalvular mitral flow measurements showed higher late diastolic flow velocity (A) but lower early diastolic flow velocity (E) and E/A ratio compared to the control group (p=.056, p=.02, and p=.04, respectively). Similarly, TDI measurements showed lower lateral and septal early diastolic myocardial velocities (E&apos;), and higher lateral and septal late diastolic myocardial velocities (A), and E/E&apos; ratios in patients with dermatochalasis compared to the control group (p=.03, p=.01, p=.09, p=.04, p=.02, and p=.01, respectively). In this study, we discovered that patients with dermatochalasis have abnormal left ventricular diastolic function. It indicates that dermatochalasis may be responsible for subclinical cardiac involvement. [Med-Science 2023; 12(3.000): 812-7