Quantum wake dynamics in Heisenberg antiferromagnetic chains.

Traditional spectroscopy, by its very nature, characterizes physical system properties in the momentum and frequency domains. However, the most interesting and potentially practically useful quantum many-body effects emerge from local, short-time correlations. Here, using inelastic neutron scattering and methods of integrability, we experimentally observe and theoretically describe a local, coherent, long-lived, quasiperiodically oscillating magnetic state emerging out of the distillation of propagating excitations following a local quantum quench in a Heisenberg antiferromagnetic chain. This "quantum wake" displays similarities to Floquet states, discrete time crystals and nonlinear Luttinger liquids. We also show how this technique reveals the non-commutativity of spin operators, and is thus a model-agnostic measure of a magnetic system's "quantumness."

Relation between aryl hydrocarbon hydroxylase inducibility, serum gamma-glutamyltransferase and serum cholesterol in middle-aged smokers and non-smokers.

Aryl hydrocarbon hydroxylase (AHH) inducibility, carbon monoxide in expired air (CO), serum gammaglutamyl-transferase (GGT), and total cholesterol were compared in equal-sized, age-matched samples of healthy middle-aged males born in 1921, 1934-1936, and 1946 attending the ongoing preventive medical population program in Malmö. AHH did not differ in various age - and smoking or non-smoking groups, and there were no correlations between AHH, GGT, and cholesterol. The findings provide evidence against the recent hypothesis that low cholesterol may mediate or reflect a carcinogenic mechanism through a state of general enzyme induction in the body.

Oral and oropharyngeal cancer, aryl hydrocarbon hydroxylase inducibility and smoking. A follow-up study.

In a series of 50 consecutive cases with oral or oropharyngeal malignancies, aryl hydrocarbon hydroxylase (AHH) inducibility and smoking habits were studied. 82% of the patients were smokers. The AHH levels were divided into high, intermediate and low groups and were correlated to a healthy control material also divided into the groups mentioned. A significant overrepresentation of patients with a high AHH level (p less than 0.0005) as well as an underrepresentation of low AHH levels (p less than 0.01) was found. Smokers with a high AHH level run a sixfold risk of developing cancer in this area and develop it earlier in life than people with low or intermediate AHH levels. Recurrences or secondary malignancies in the upper digestive tract or airways were substantially higher in the high AHH level group as compared to the other. A high AHH inducibility level thus is of both pathogenetic as well as prognostic importance in oral and/or oropharyngeal cancer.

Smoking, carboxyhaemoglobin, carbon monoxide in expired air and aryl hydrocarbon hydroxylase inducibility. A cross-sectional study and anti-smoking applications in middle-aged men.

In this cross-sectional study we report on the distributions of carboxyhaemoglobin in blood (COHb%), carbon monoxide in expired air (CO), and aryl hydrocarbon hydroxylase (AHH) inducibility in age-matched samples of males born 1934-36 and 1921, attending our ongoing preventive medical health screening program in Malmö. Both COHb% and CO showed great interindividual variations in the smokers; potentially of value as a complement to smoking history to identify smokers at high risk of tobacco-related diseases. They also provide powerful arguments for quitting smoking. Therefore, CO is now measured and discussed by the nurses as part of the screening investigation in all smokers. Neither COHb% nor CO showed correlations to the AHH induction levels. There were no associations between the latter and the smoking category, which supports that AHH inducibility is under genetic control. However, high AHH induction in smokers implies an increased risk of smoking-induced carcinogenesis. Smokers with high AHH inducibility identified in the screening have, therefore, been invited to antismoking information and counselling.

Chronic effects of gastroduodenal surgery on glucose and insulin response to oral glucose tolerance test in a population study.

Oral glucose tolerance test (OGTT) results were compared between 4,667 middle-aged males attending a preventive medical screening and intervention program in Malmö and the subjects in this sample who reported a history of previous operation for gastric or duodenal ulcer (n = 158, or 3.4%). 76% of the operated subjects were smokers in comparison with 50% in the general cohort of males of the same age. The glucose and insulin responses in the OGTT in both the smoking and non-smoking operated cases showed higher early peak values and a subsequent rapid drop of the levels with lower 120-min values of both glucose and insulin compared to the average screening cohort. This type of response to an oral glucose load had previously been well known in the acute and immediate postoperative stages of gastric and duodenal resection, but it had not been shown before that it seems to be a permanent effect and may chronically influence the results of OGTTs in the population. Gastro-duodenal surgery should be included among the factors which may significantly affect the chronic results and thereby also the clinical interpretation of the OGTTs in the population.