Sökning: "small volumes"

Visar resultat 11 - 15 av 215 avhandlingar innehållade orden small volumes.

1. 11. New methods for sensitive analysis with nanoelectrospray ionization mass spectrometry

   Författare :Patrik Ek; Johan Roeraade; Åsa Emmer; Andries P. Bruins; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; mass spectrometry; electrospray ionization; nanoelectrospray ionization; adjustable gap; emitter; miniaturization; improved sensitivity; nanoliter picoliter sample volumes; Alzheimer’s disease; amyloid-beta Aβ ; Analytical chemistry; Analytisk kemi;

   Sammanfattning : In this thesis, new methods that address some current limitations in nanoelectrospray mass spectrometry (nESI-MS) analysis are presented. One of the major objectives is the potential gain in sensitivity that can be obtained when employing the proposed techniques. LÄS MER

3. 12. Cerebral arterial pulsatility imaging using 4D flow MRI : methodological development and applications in brain aging

   Författare :Tomas Vikner; Anders Wåhlin; Anders Eklund; Jan Malm; Lars Nyberg; Susanne Schnell; Umeå universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Magnetic resonance imaging; 4D flow MRI; medical image analysis; cerebral hemodynamics; arterial pulsatility; DCE MRI; blood-brain barrier; white matter lesions; perivascular spaces; cerebral small vessel disease; hippocampus; cognition; aging; biomedicinsk strålningsvetenskap; Biomedical Radiation Science;

   Sammanfattning : 4D flow magnetic resonance imaging (MRI) is increasingly recognizedas a versatile tool to assess arterial and venous hemodynamics. Cerebral arterial pulsatility is typically assessed by analyzing flow waveforms over the cardiac cycle, where flow amplitude is a function of cardiac output, central arterial stiffness, and cerebrovascular resistance and compliance. LÄS MER

4. 13. Essays on Financial Technology and SME Finance : A Tale of Two Effects of the Global Financial Crisis: Financing SMEs and Innovative Financing

   Författare :Ed Saiedi; Anders Broström; Ali Mohammadi; Felipe Ruiz Lopez; Tom Vanacker; KTH; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Corporate Finance; Entrepreneurial Finance; Global Financial Crisis; Financial Innovation; Small and Medium Enterprises; Industriell ekonomi och organisation; Industrial Economics and Management;

   Sammanfattning : The financial crisis of 2008-2009 took place exactly half a century after the publication of the seminal Modigliani and Miller (M&M) theorem, often called the capital structure irrelevance principle. This timing is curious since the crisis has highlighted the significance of deviations from assumptions of this theorem, i.e. LÄS MER

5. 14. Environmental and domestic risk factors for respiratory symptoms in Nicaraguan children

   Författare :Danilo Hernandez; Avdelningen för arbets- och miljömedicin; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; * wheeze* Child labor* asthma* allergy* aeroallergens* lung volumes* waste-picking* particles* wood-smoke* burning of solid waste;

   Sammanfattning : BackgroundRespiratory diseases are the most common cause for seeing a doctor in Nicaragua, and the second most common cause of death in children. An air monitoring program in the capital city, Managua, has shown high levels of air pollution, especially small particles. LÄS MER

7. 15. Logistics systems for recycling : on the influence of products, structures, relationships and power

   Författare :Maria Huge Brodin; Linköpings universitet; []
   Nyckelord :logistics systems; recycling; products structures; relationships; power; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP;

   Sammanfattning : The environmental trend, and environmental legislation, has during the past decade grown stronger, and with it the focus on environmental issues within many fields of research and practice. This has implications for logistics, and the focus in this dissertation is on the logistics systems that are needed to realise recycling of end-of-life products: logistics systems for recycling (LSRs). LÄS MER