909 research outputs found
Chromogranin A and cortisol at intraoperative repeated noxious stimuli: surgical stress in a dog model
Objectives: Biomarkers representing sympathetic tone and the surgical stress response are measured to objectively evaluate surgical techniques and anaesthetic protocols. If a part of the intraoperative procedure is repeated on the contralateral organ, one animal may potentially serve as its own control and, if so, may minimize the problem of individual differences of the stress response to anaesthesia and surgery. This study aimed to investigate the use of chromogranin A for measurement of the intraoperative sympathetic tone. Additional aims were to investigate chromogranin A and cortisol as indicators of the intraoperative surgical stress response caused by repeated noxious stimuli in dogs subjected to ovariohysterectomy and thereby to investigate the possibility of one dog serving as its own control. Methods: Experiments were carried out on 10 dogs subjected to ovariohysterectomy. Perioperative blood samples (0-6) were collected after premedication, immediately before induction of anaesthesia (0), after induction of anaesthesia and before incision (1), before (2) and after (3) removal of the first ovary, after a 15-min pause before removal of the second ovary (4), after removal of the second ovary (5) and after closing the abdomen (6). Plasma chromogranin A and cortisol were analysed. Results: Plasma chromogranin A did not change. Plasma cortisol concentration did not change between before anaesthesia and opening of the abdomen. Plasma cortisol increased at removal of the first ovary. Cortisol did not change at removal of the second ovary but remained increased compared to initial sample. Conclusion: The results suggest chromogranin A is a poor indicator of intraoperative sympathetic tone during elective surgery in dogs. Cortisol measurement was useful for assessment of intraoperative noxious stimuli. However, at these test conditions, neither plasma chromogranin A nor plasma cortisol was useful for assessment of repeated intraoperative noxious stimuli where one dog served as its own control.
Choline supplementation does not have an impact on blood lipids - A systematic review on the effects of oral supplemental choline on blood lipid profile
Aim:
The aim of this project is to systematically summarize and review evidence from randomized controlled trials on the potential effect of choline supplementation on blood lipids low-density lipoprotein (LDL), high-density lipoprotein (HDL), and total cholesterol (TC).
Methods: The literature search was conducted in the PubMed and Scopus databases in January 2023. The outcome measures were LDL, HDL, and TC. The intervention group was assigned dietary supplements with choline and the control group was assigned a placebo. The criteria for inclusion were individuals aged 18 and above, and in the studies considered, choline was solely administered orally. The criteria for exclusion comprised individuals under the age of 18, studies that were not RCTs, studies employing a control method other than a placebo, and studies written in languages other than Swedish or English. Studies that met the selected criteria were quality-reviewed according to the SBU’s template “assessment of randomized studies (effect of being assigned an intervention (ITT))” and evidence-graded according to GRADE.
Results: The literature search resulted in 266 matches. Fourteen articles were read in full text, out of which two were included in this systematic review. The two included studies constituted a study population of a total of 83 people and were assessed to have a low as well as moderate risk of bias. The interventions spanned a duration of eight to twelve weeks. No statistically significant effects were observed for the outcome measures LDL, HDL, nor TC. The result consistently showed that oral supplementation of choline has no effect on these outcome measures in adults over 18 years.
Conclusion: There is high certainty (++++) evidence to suggest that oral supplementation of choline has no effect on LDL, HDL, or TC
Improving flow and resource efficiency to increase capacity and area utilisation in electronics production
BI Norwegian Business School
Masteroppgave(MSc) in Master of Science in Business, Sustainable Finance - Handelshøyskolen BI, 2023The main goal of this paper is to investigate if determining factors of clean energy stock performance in Europe have been influenced by the Paris Agreement. The analysis consist of three models in the time period before the Paris Agreement, and three models in the time period after the Paris Agreement. The models consist of variables related to the stock- and energy market and climate factors as well as a European clean energy index. To conduct our analysis we utilize a LA-VAR and a VAR framework. Using the results from this we examine the Granger causality, impulse responses and variance decomposition. The main findings of this paper are the shift in Granger causality before and after the Paris Agreement. We find that the stock market factors Granger-causes the clean energy index prior to the Paris Agreement, but not following the Agreement. On the other hand, we find that the climate- and energy factors do not Granger-cause the clean energy index prior to the Paris Agreement, but Granger-causes in the period following the Paris Agreement. This indicates that the Paris Agreement have influenced determining factors of clean energy stock performance in Europe
Aktivera rummen mellan rummen
Folkhälsan är ett högst relevant ämne att studera då den är av en eskalerande och nedåtgående
trend i Sverige idag, både gällande fysisk och psykisk ohälsa. Detta hälsoproblem är utbrett hos
stora delar av befolkningen samt det mest kostsamma samhällsproblemet idag. Dock är det konstaterat
att detta går att råda bot på genom den byggda miljön. Forskning visar på att mer fysisk
aktivitet och mindre stillasittande är nyckeln till ett hälsosammare liv och att det har klara samband
mellan hur den byggda miljön är utformad.
Denna studie syftar till att få en bättre förståelse för hur den byggda miljön möjliggör för människan
att vara fysiskt aktiv i staden. Detta har gjorts genom att undersöka och utveckla designverktyg
som förbättrar de rumsliga förhållandena på de offentliga ytorna för fysisk aktivitet, detta
för att bidra med hälsofrämjande miljöer i människors närområden. Målet med studien har
varit att visa hur den byggda miljön kan stödja fysisk aktivitet baserat på teoretisk forskning och
undersökande platsanalys för att sedan redovisa detta genom ett gestaltningsförslag. Förslaget
kommer att diskutera hur behovet av mer rörelse i vårt vardagsliv kan tillgodoses av stödjande
design och arkitektur i närmiljö. Det syftar även till att visa hur platser kan understödja varandra
och ge upphov till mer spontan aktivitet i stadsrummet och främja folkhälsan. En viktig aspekt
är hur de så kallade friytorna i staden kan brukas.
För att förstå vilka miljöer som stödjer människan till att vara fysiskt aktiv i den byggda miljön
har samtida teorier studerats. Litteraturstudien visar på att faktorerna närhet, tillgänglighet och
användbarhet är de tre faktorer som mest stödjer människor till rörelse, men även faktorerna
trygghet och estetik, så som bland annat grönska. Desto högre grad av dessa faktorer, ju mer
fysisk aktivitet sker. Samt att ett dos- responsförhållande är rådande, vilket innebär att desto fler
stöttande miljöer som omger människan desto större chans är det att människan är fysiskt aktiv.
Platsstudie har utförts av tre befintliga miljöer i Lunds östra innerstad, korsningen SkolgatanÖstra
Vallgatan, Södra entrén till Östra kyrkogården samt Kapellvägen. De valda platserna har
gemensamt att de utgör tre sargade friytor i staden som är i stort behov av upprustning, samt
att det är platser där lite fysisk aktivitet sker idag. Platsstudierna utgör egna observationer och
analys genom verktyg. Genom platsstudierna identifierades platsernas karaktärer, kvaliteter och
förutsättningar samt kontext.
Några lika problem som identifierades på platserna var:
- Avsaknaden av rumslighet
- Avsaknaden av trygghet
- Avsaknaden av vistelsemöjlighet
- Avsaknaden av fysisk aktivitet
Gestaltningsförslaget utgick ifrån resultatet av platsstudien samt litteraturstudien. Konceptet till
gestaltningsförslaget har varit att binda ihop för att först nå de strukturella förändringarna på
plats för att skapa en mer sammanhållen och attraktiva kopplingar mellan platserna som ska
skapa mer gynnsamma förutsättningar för rörelse. Sedan togs koncept fram för att nå detaljer
och rumslighet genom nyckelorden: God vistelse, goda snitt, aktivera, rumsindelning och sammanfoga
på platserna så att programpunkterna på varje plats kunde uppnås för att stödja den
fysiska aktiviteten. Målet med gestaltningen har varit att utnyttja platsernas egna karaktärer och
försöka förstärka dessa för att locka till mer rörelse.
Avslutningsvis diskuteras hur viktigt det är att det skapas närmiljöer med en bättre tillgång med
ytor till fysisk aktivitet. För att tillgodose människors olika behov är det viktigt att dessa ytor
är flexibla för att skapa vida möjligheter för brukaren. Det är även av hög relevans att skapa en
design som utgår från platsens egen karaktär och inte applicera en färdig design.
Strukturen som följer i arbetet är att i den indelande delen av arbetet presenters en litteraturgenomgång
av samtida teorier kring ämnet byggd miljö och folkhälsa. Därefter följs en
presentation av platserna. Gestaltningsförslaget presenteras därefter samt följt av en sammanfattande
diskussion om förslaget och arbetsprocessen.Public health is a highly relevant subject to study as it is of an escalating and downward trend
in Sweden today, both regarding to physical and mental health. This problem is also widespread
among large parts of the population and the most costly social problem today. However, it has
been established that this can be corrected through the built environment. Research shows that
more physical activity is the key to a healthier life and that it has clear connection between how
the built environment is designed.
This study examines how to gain a better understanding of how the built environment affects
and enables us to be physically active in the city. It also intends to investigate and develop design
principles that improve the spatial conditions on the public spaces for physical activity, in
order to contribute with health promoting environments in people’s neighbourhoods. The aim
of the thesis has been to show how the built environment can support physical activity based
on theoretical research and site analyzes. The result will be presented in a design proposal that
will discuss how everyday activity can be added and supportive in the local area. It also aims to
show how places for physicla activity can support each other. An important aspect is how the
free spaces in the city can be used.
In order to understand what affects and enables people to be physically active in the built environment
has contemporary development theories been studied. The literature study shows that
proximity, accessibility and usability are the three factors that affect people to movement. It also
aims to show how places can support each other and give rise to more spontaneous activity in
the urban space and promote public health. An important aspect is how the so-called free spaces
in the city can be used but also factors such as safety and aesthetics, such as greenery. The higher
the degree of these factors, the more physical activity occurs. And that a dose-response relationship
prevails, which means that the more supportive environments that surround people, the
greater the chance it is for people to be physically active.
Observations have been made of three existing environments in Lund´s eastern inner city, the
intersection of Skolgatan – Östra Vallgatan, the southern entrance to Östra Kyrkogården and
Kapellvägen. The chosen places have in common that they constitute three lined free areas in the
city that are in great need of renovation and that there are little physical activity today.
Through the site studies the places character´s, qualities, conditions and also the context were
identified. Some similar problems that was identified at the sites where:
- The lack of spatiality
- The lack of security
- The lack of opportunity to stay
- The lack of physical activity
The design proposal was based on the results of the site study and the literature study. The concept
of the design proposal has been to tie together to first achieve the structural changes in place
to create a more cohesive and attractive links between the sites that will create a more favorable
conditions for movement. Then concepts were developed to reach details and spatiality through
the keywords: Good stay, good cuts, activating, room division and joining in places so that the
program points in each location could be achieved to support the physical activity.
The aim of the design has been to utilize the site´s own characters and try to strengthen them to
attract more movement.
Finally, it is discussed how important it is to create local environments with better access with
areas for physical activity. In order to meet people´s different needs, it is important that these
surfaces are flexible, in order to create wide opportunities for the user. It is also of high relevance
to create a design that is based on the site´s own character and not a finished design. The
structure that follows in the work is that in the dividing part of the work a literature review of
contemporary theories on the topic of built environment and public health is presented. Then
a presentation of the sites is followed. The design proposal is then presented and followed by a
summary discussion of the proposal and the work process
Seasonal impact in horticulture companies : effects that can lead to loss of competence in the industry
The purpose of this final thesis is to investigate the effects of seasonal changes in the
horticulture industry. In this study this includes mainly garden designers, constructors of gardens and parks and horticultural businesses at Österlen. Today the most important issue,both in private and in public environment, is that the winter occupation in this area is not big enough. The consequence of this issue can result in the loss of competence to other industries if educated personnel has to stay employed only over season. The study is trying to identify and rank factors that are contributing to the problem, and propose solutions that means work opportunities for companies in the horticulture industry as well as for their employees, during twelve months of the year.Detta examensarbete syftar till att undersöka säsongspåverkan inom trädgårdsnäringen.
Undersökningen omfattar främst trädgårdsdesigners, trädgårds- och parkanläggare samt ägare
av plantskolor/handelsträdgårdar på Österlen. I dagsläget är det viktigaste problemet, både i
privat och offentlig miljö, att vintersysselsättning inom området inte räcker till. Konsekvensen
av detta kan bli kompetensförlust till andra branscher om kvalificerad personal tvingas förbli
säsongsanställda. Examensarbetet försöker identifiera och rangordna faktorer som bidrar till
problemet, samt ge förslag på lösningar som innebär sysselsättning för företagare inom
trädgårdsnäringen samt för deras anställda under årets tolv månader
Altered Expression of Somatostatin Receptors in Pancreatic Islets from NOD Mice Cultured at Different Glucose Concentrations In Vitro and in Islets Transplanted to Diabetic NOD Mice In Vivo
Somatostatin acts via five receptors (sst1–5). We investigated if the changes in pancreatic islet sst expression in diabetic NOD mice compared to normoglycemic mice are a consequence of hyperglycemia or the ongoing immune reaction in the pancreas. Pancreatic islets were isolated from NOD mice precultured for 5 days and further cultured for 3 days at high or low glucose before examined. Islets were also isolated from NOD mice and transplanted to normal or diabetic mice in a number not sufficient to cure hyperglycemia. After three days, the transplants were removed and stained for sst1–5 and islet hormones. Overall, changes in sst islet cell expression were more common in islets cultured in high glucose concentration in vitro as compared to the islet transplantation in vivo to diabetic mice. The beta and PP cells exhibited more frequent changes in sst expression, while the alpha and delta cells were relatively unaffected by the high glucose condition. Our findings suggest that the glucose level may alter sst expressed in islets cells; however, immune mechanisms may counteract such changes in islet sst expression
Simulering av tågtrafik - Fordons- och förarbeteende i simulering kontra verklighet
Simuleringsprogram används inom järnvägsbranschen för att simulera tågtrafik under olika förhållanden. Då fordons- och förarbeteende är av stor vikt för tågtrafiksimuleringars resultat är det viktigt att dessa data modelleras på ett korrekt sätt utifrån verkliga förhållanden. Området fordons- och förarbeteende är relativt outforskat, varför studier inom området är önskvärda. Syftet med detta examensarbete har varit att - utifrån tillgänglig fordons- och förardata - undersöka fordons- och förarbeteende för jämförelse mot dagens trafiksimuleringar i simuleringsprogrammet OpenTrack. Genomförda simulering har visat att endast konstanta retardationer utifrån inställt retardationstal erhålls. Vid analys och sammanställning av fordonsloggar har det kunnat utläsas att de genomsnittliga retardationerna varierar beroende på utgångshastighet, och att förarbeteendet spelar stor roll för bromssträckans längd. Bromssträckorna tenderar att minska i spridning ju lägre utgångshastigheten är. Andra fenomen som kunnat utläsas är tillsättnings- och lossningstid för bromsen samt ”uppoch nedstyrningstid” för dragkraften vid accelerationer. Analys av förarbeteendet har visat att retardationerna utförs med olika bromsverkan beroende på om retardationen är ATC-övervakad eller inte. Vidare har jämförelsen mellan simulering och fordonslogg visat på att det finns skillnader mellan simulering och verkliga förhållanden, främst avseende retardationsegenskaper. Resultatet av undersökningen har visat att det endast är rimligt att definiera ett normalfordon, då fordonsbeteende kan betraktas som en funktion av både fordons- och förarbeteende. Slutligen har resultaten i examensarbetet visat på att det finns behov av nya och ändrade parametrar i OpenTrack, där retardationstal utifrån utgångshastighet är den viktigaste
Produção agroflorestal sustentável
Resumo: Este trabalho foi desenvolvido para o litoral paranaense, envolvendo os recursos florestais da Mata Atlântica. Teve como objetivo fornular modelos de produção sustentável que, otimizando o rendimento econômico da pequena propriedade rural através da venda de produtos medicinais, conservassem os recursos florestais produtivos e ampliassem sua disponibilidade. Primeiramente foram selecionadas 18 espécies arbóreas, provenientes de 16 famílias, cujos produtos madeireiros e medicinais tinham preços e quantidades definidos nos respectivos mercados. A partir dos dados obtidos mediante pesquisa de mercado foi possível conhecer os diversos valores e volumes comercializados de produtos madeireiros e medicinais originados de uma mesma espécie. E, ainda, estimar a renda que uma árvore-tipo de cada espécie pode gerar, quando os produtos obtidos são vendidos nestes dois mercados. Em todos os casos a renda dos produtos medicinais por árvore, foi maior que a renda obtida da comercialização da madeira. Metade das espécies estudadas apresentaram boas possibilidades de produzir rendas anuais sem uso do extrativismo predatório. Na formulação dos modelos de produção, foi escolhida como exemplo, a região de Antonina. Foi definida a situação básica (MI), onde uma propriedade rural de 16 ha, dedica até 3 ha para agricultura de subsistência e tem 10 ha de floresta secundária explorável dentro dos limites legais e de recuperação. Nos cálculos utilizou-se a força de trabalho de duas pessoas, dedicadas às atividades agrícolas e florestais durante 8h 1dia e 273 dias/ano. A programação linear foi o método usado para otimizar a alocação do tempo de mão-de-obra disponível. O MI maximizado teve como resultado R$3.239,00/ano. O MII inclui a receita da casca medicinal obtida das árvores derrubadas (3,84m3/ano), com crescimento na renda anual de 18% a.a. No MIII foram acrescentados os rendimentos obtidos da venda de folhas, frutos e óleo produzidos sem extrativismo predatório, com crescimento da renda anual de 63% sobre o modelo básico. O modelo IV incluiu a domesticação de seis espécies com folhas medicinais, 900 mudas cultivadas e/ou adensadas em um hectare. Este último modelo utilizou três níveis de preços para folhas, combinados com dois diferentes períodos de trabalho, 288 e 320 dias ao ano. Os melhores resultados anuais foram obtidos com o MIII, onde os produtos medicinais são vendidos no mercado coletor, e com o MIV -F que considera a venda para o mercado fracionador atacadista/varejista de Curitiba. A médio e longo prazos, foram obtidos melhores resultados com os modelos IV -B no mercado coletor, IV-C no mercado atacadista e IV-E no mercado fracionador. As variações do modelo IV são mais exigentes em mão-de-obra, mas permitem que os recursos produtivos sejam mantidos e melhorados
- …
