596 research outputs found
Profiling Finnish Polar Hops - Are They Native And How Do They Look Like?
Posteritiivistelmä on julkaistu Maataloustieteen päivien 2018 Abstraktikirjassa s. 279
http://www.smts.fi/sites/smts.fi/files/MTP2018_Abstraktikirja.pd
Hunting for Finnish Hops: Are They Indeed Growing in That North And How Do They Look Like?
Posteri201
Comparison of EQ-5D and 15D instruments for assessing the health-related quality of life in cardiac surgery patients
Peer reviewe
Polyaniliiniemäksen liukoisuus
Tämän työn tarkoituksena oli selvittää polyaniliinin emäsmuodon rakenteen ja sen liukoisuuden välistä suhdetta.
Tavoitteena oli myös etsiä keinoja, joilla päästäisiin tuotteen hyvään liukoisuuteen sekä analyysimenetelmiä, joita voitaisiin käyttää laaduntarkkailun apuvälineinä teollisuudessa.
Tutkimuksessa tuli ilmi puhalluskuivauksessa tapahtuva polymeerin silloittuminen ja hapetusasteen kasvaminen.
Laadun kannalta nämä ovat merkittäviä asioita, sillä silloittuneiden tuotteiden liukoisuus oli huonompi kuin silloittumattomien.
Karakterisoinnissa oleellisimmat analyysimenetelmät olivat optinen mikroskopia liukoisuuskokeissa, geelikromatografia, liuosviskositeetin määritys sekä NMR- ja IR-spektroskopia.
Lisäksi käytettiin hyväksi muutamia muita menetelmiä, kuten ominaispinta-alan määritystä, laajakulmaröntgendiffraktiota ja dynaamista valonsirontaa.
Polyaniliinin kuivausta simuloitiin laboratoriomittakaavan laitteistolla.
Tulosten perusteella todettiin, että mitä suurempi polymeerin moolimassa oli, sitä huonommin se liukeni.
Toisaalta havaittiin, että mitä enemmän ketjussa oli imiinisiä, kaksoissidoksellisia typpiatomeja, sitä huonompi oli liukoisuus.
Koska sekä moolimassan että hapetusasteen todettiin kasvavan puhalluskuivauksessa, kuivaus suositeltiin tehtäväksi tyhjöuunissa 40 °C:een lämpötilassa (vakuumitaso 10[-2] mbar).
Työssä todettiin myös, että kaikkien tutkittujen näytteiden hapetusasteet olivat nigraniliinin tasolla (75 %:sti hapettunut PANI), vaikka aikaisemman kokemuksen perusteella polymeerien oletettiin olevan emeraldiinia (50 %:sti hapettunut PANI).
Laaduntarkkailun apuvälineiksi sopivia analyysimenetelmiä ovat liukoisuuskokeet N-metyyli-2-pyrrolidonissa, johon on lisätty 0,2 mol/1 litiumkloridia, liuosviskositeetin määritys rikkihappoliuoksissa 0,1 p-%:n polymeeripitoisuudella sekä IR-spektroskopia hapetusasteen selvittämiseksi
Spin and Statistics and First Principles
It was shown in the early Seventies that, in Local Quantum Theory (that is
the most general formulation of Quantum Field Theory, if we leave out only the
unknown scenario of Quantum Gravity) the notion of Statistics can be grounded
solely on the local observable quantities (without assuming neither the
commutation relations nor even the existence of unobservable charged field
operators); one finds that only the well known (para)statistics of Bose/Fermi
type are allowed by the key principle of local commutativity of observables. In
this frame it was possible to formulate and prove the Spin and Statistics
Theorem purely on the basis of First Principles.
In a subsequent stage it has been possible to prove the existence of a
unique, canonical algebra of local field operators obeying ordinary Bose/Fermi
commutation relations at spacelike separations. In this general guise the Spin
- Statistics Theorem applies to Theories (on the four dimensional Minkowski
space) where only massive particles with finite mass degeneracy can occur. Here
we describe the underlying simple basic ideas, and briefly mention the
subsequent generalisations; eventually we comment on the possible validity of
the Spin - Statistics Theorem in presence of massless particles, or of
violations of locality as expected in Quantum Gravity.Comment: Survey based on a talk given at the Meeting on "Theoretical and
experimental aspects of the spin - statistics connection and related
symmetries", Trieste, Italy - October 21-25, 200
Perceived health among percutaneous coronary intervention patients over a six-year follow-up period
AbstractAims and objectives: The study was conducted to describe long-term perceived health among patients after a percutaneous coronary intervention as well as clarify the associations between perceived health and various factors.Background: Perceived health is an important outcome for coronary heart disease patients who have undergone percutaneous coronary intervention. Poor perceived health predicts low adherence to treatment, morbidity and mortality.Design: An explanatory and descriptive survey with a six-year follow-up (STROBE Statement: File S1).Methods: Baseline data (n = 416) were collected in 2013, with follow-up data collected from the same study group in 2019 (n = 154) at two university hospitals and three central hospitals in Finland. The employed self-reported questionnaire was based on the EuroQoL visual analogue scale and EuroQol five-dimensional scale. Data were analysed using descriptive statistics and multivariate methods.Results: Perceived health did not significantly differ four months or six years after percutaneous coronary intervention. The respondents most commonly reported pain and discomfort (62.1%), problems in mobility (50.3%), issues with usual activities (27.5%), and anxiety and depression (24.0%). Managing self-care (8.5%) was least likely to be an issue for the respondents. A majority of the reported problems were of a mild nature. The consumption of an adequate amount of vegetables, lower systolic blood pressure, regular follow-up treatment, lack of prior invasive procedures, and younger age predicted better scores for both perceived health and its separate dimensions.Conclusion: Regular follow-up is important to ensure after percutaneous coronary intervention to identify patients with pain and discomfort, mobility problems, depression and anxiety. Healthcare professionals should pay particular attention to elderly patients, who have undergone severe invasive procedures.Relevance to Clinical Practice: This study confirms the importance of regular follow-ups for post-percutaneous coronary intervention patients.Patient or Public Contribution: Patients have completed a self-reported questionnaire based on informed consent.Abstract
Aims and objectives: The study was conducted to describe long-term perceived health among patients after a percutaneous coronary intervention as well as clarify the associations between perceived health and various factors.
Background: Perceived health is an important outcome for coronary heart disease patients who have undergone percutaneous coronary intervention. Poor perceived health predicts low adherence to treatment, morbidity and mortality.
Design: An explanatory and descriptive survey with a six-year follow-up (STROBE Statement: File S1).
Methods: Baseline data (n = 416) were collected in 2013, with follow-up data collected from the same study group in 2019 (n = 154) at two university hospitals and three central hospitals in Finland. The employed self-reported questionnaire was based on the EuroQoL visual analogue scale and EuroQol five-dimensional scale. Data were analysed using descriptive statistics and multivariate methods.
Results: Perceived health did not significantly differ four months or six years after percutaneous coronary intervention. The respondents most commonly reported pain and discomfort (62.1%), problems in mobility (50.3%), issues with usual activities (27.5%), and anxiety and depression (24.0%). Managing self-care (8.5%) was least likely to be an issue for the respondents. A majority of the reported problems were of a mild nature. The consumption of an adequate amount of vegetables, lower systolic blood pressure, regular follow-up treatment, lack of prior invasive procedures, and younger age predicted better scores for both perceived health and its separate dimensions.
Conclusion: Regular follow-up is important to ensure after percutaneous coronary intervention to identify patients with pain and discomfort, mobility problems, depression and anxiety. Healthcare professionals should pay particular attention to elderly patients, who have undergone severe invasive procedures.
Relevance to Clinical Practice: This study confirms the importance of regular follow-ups for post-percutaneous coronary intervention patients.
Patient or Public Contribution: Patients have completed a self-reported questionnaire based on informed consent
Time related Characteristics of cardiac systole, diastole, baroreeeptor activity and inactivity during vagal stimulation and mild haemorrhage in the dog
The duration of cardiac systole and diastole in each individual cardiac cycle were measured from aortic pressure curves during vagal stimulation and mild haemorrhage with simultaneous recording of aortic baroreceptor single fibre nerve activity. The duration of cardiac diastole was highly correlated with the duration of cardiac cycle in all the interventions. The correlation coefficient between the duration of cardiac systole and the duration of cardiac cycle was not as high as that between the duration of cardiac cycle and cardiac diastole. A highly linear correlation also existed between the duration of cardiac cycle and the duration of baroreceptor inactivity time. The same was true when the duration of baroreceptor inactivity time was compared with the duration of cardiac diastole. It is concluded that the duration of baroreceptor inactivity time may inform the central nervous system about heart rate
Antiarrhythmic drug therapy among patients presenting to emergency department with symptomatic atrial fibrillation - a prospective nationwide cohort
Background: Atrial fibrillation (AF) is a common arrhythmia that causes numerous visits to emergency departments (ED). The aim of the FinFib2 study was to evaluate whether treatment of patients with AF in ED is consistent with the contemporary European Society of Cardiology (ESC) management guidelines. Here we report the results of antiarrhythmic drug therapy (AAD) in ED. Methods: All patients within the two-week study period whose primary reason for the ED visit was symptomatic AF were included into this prospective multicentre study. Comprehensive data on factors contributing to the treatment of AF were collected, including a data of previous use of ADDs, and changes made for them during a visit in ED. Results: The study population consisted of 1013 consecutive patients (mean age 70 +/- 13 years, 47.6% female). The mean European Heart Rhythm Association (EHRA) symptom score was 2.2 +/- 0.8. Rhythm control strategy was opt for 498 (63.8%) and 140 (64.5%) patients with previously and newly diagnosed AF, respectively. In patients with previously diagnosed AF the most frequently used AAD was a beta blocker (80.9%). Prior use of class I (11.4%) and III (9.1%) AADs as well as start or adjustment of their dosage (7.4%) were uncommon. Most of the patients with newly diagnosed AF were prescribed a beta blocker (71.0%) or a calcium channel antagonist (24.0%), and only two of them received class I or class III AADs. Conclusions: Our data demonstrated that in patients presenting to the ED with recurrent symptomatic AF and aimed for rhythm control strategy, the use of class I and class III AADs was rare despite ESC guideline recommendations. It is possible that early adaptation of a more aggressive rhythm control strategy might improve a quality of life for symptomatic patients and alleviate the ED burden associated with AF. Beta blockers were used by majority of patients as rate control therapy both in rate and rhythm control groups.Peer reviewe
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