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The majority of user experiments at the high repetition-rate free electron laser (FEL) facility FLASH are of pump-probe type, combining the extreme ultraviolet (XUV) or soft x-ray radiation from the FEL with ultrashort pulses generated by optical lasers. In this contribution, we demonstrate the advantages of using high-power Yb:YAG lasers with subsequent nonlinear pulse compression stages based on

Ultrasound Optical Tomography (UOT) combines the high-resolution imaging capability of ultrasound with measurements of light absorption and scattering properties of human tissue. This non-invasive technique could distinguish between cancerous and non-cancerous lesions inside the breast tissue, follow tumor shrinkage during preoperative treatment, or provide information on blood oxygenation levels.

In the present thesis, genetic abnormalities in pancreatic cancer were studied, with special emphasis on alterations of components involved in the transforming growth factor beta (TGFB) signaling pathway. In the first study, fluorescence in situ hybridization and cytogenetic analyses revealed aberrations of chromosome 18 in all 13 pancreatic carcinoma cell lines studied, in particular frequent bre

Popular Abstract in Swedish Livskvalitet och problem i dagligt liv under och efter akut leukemi eller högmalignt lymfom - ett omvårdnadsperspektiv. Syftet med avhandlingen var att undersöka hur personer med akut leukemi eller hög- malignt lymfom upplevde och hanterade de problem som uppstod i det dagliga livet i samband med sjukdom och behandling och efter det att behandlingen avslutats. StudierThe aims of this thesis were, to investigate the impact on daily living of acute leukaemia or highly malignant lymphoma when under treatment, viewed retrospectively and from a longitudinal perspective, from the point of view of the patients and their spouses, and to ascertain their view of the nursing care provided. A combination of qualitative and quantitative methods was use i.e. open-ended inte

Popular Abstract in Swedish Blåsexstrofi är en ovanlig och mångfasetterad missbildning. I hela Sverige föds cirka tre barn om året med blåsexstrofi. Bukvägg och urinblåsa är öppna nedanför naveln, så att man ser blåsans insida samt rinnande urin. Flickorna har en delad clitoris, framflyttad och trång slidöppning samt framflyttad ändtarmsöppning. Pojkarna har en kort, öppen penis, som ligger uppfälBladder exstrophy is a complex malformation seen in 1/30 000. Most children are subject to repeated operations, including pelvic osteotomy, genital and bladder neck reconstruction and sometimes bladder augmentation or a urinary reservoir, to achieve continence and a normal genital function. A retrospective study of all Swedish children born 1970-89 showed a low continence rate, 17% , and a high r

Popular Abstract in Swedish Tjocktarmcancer är en av de vanligaste cancerformerna i västvärlden. I Sverige drabbas årligen ca 5000 människor. Ungefär 10% av fallen går att härleda till ärftliga faktorer medan den övervägande delen orsakas av miljöfaktorer. Kända riskfaktorer är fysisk inaktivitet, fetma och rökning. Risken för cancer påverkas dock mest av den kost vi äter. Allmänt kan sägas att enSphingomyelin (SM) is present both in eucaryotic cells and the diet. Sphingomyelinase (SMase) hydrolyses SM and generates ceramide that has been implicated in the regulation of cell growth, differentiation and apoptosis. Previously a SMase with alkaline pH optimum was identified in the intestinal tract. The thesis studied the distribution pattern, the species difference and the clinical implicatio

The tumor suppressor gene p53 can mediate both apoptosis and cell cycle arrest. In addition, p53 also influences differentiation. To further characterize the differentiation inducing properties of p53, we overexpressed a temperature-inducible p53 mutant (ptsp53Val135) in the erythroleukemia cell line K562. The results show that wild-type p53 and hemin synergistically induce erythroid differentiati

The existing information supports the use of this material as described in this safety assessment. Dihydrocarvyl acetate was evaluated for genotoxicity, repeated dose toxicity, reproductive toxicity, local respiratory toxicity, phototoxicity/photoallergenicity, skin sensitization, and environmental safety. Data from read-across analogs dihydrocarveol (isomer unspecified) (CAS # 619-01-2) and aceti

Popular Abstract in Swedish Att en elektrisk urladdning ger upphov till ljus syns varje gång blixten slår ner. Den omvända processen, att ljus kan skapa en elektrisk urladdning, upptäcktes av Hertz 1887 som en parentes i utvecklingen av radiomottagare. Undersökningar av detta fenomen visade att elektroner bara kunde frigöras av ljus som hade tillräckligt hög frekvens (ultraviolett). Förklaringen aTreating the correlated behaviour of multiple particles is challenging for both theory and experiment. This thesis reports on a variety of experimental investigations aiming to advance the understanding of fundamental processes in atoms and molecules: double ionization, isomerization and dissociation. The emphasis lies on ultra-fast processes, where multiple electrons interact or nuclei move so ra

Popular Abstract in Swedish Elektrocochleografi (ECoG) är en metod som mäter de elektriska signaler som uppstår i innerörat när örat stimuleras med ljud. Signalerna uppstår i snäckans sinnesceller, de så kallade hårcellerna, och i nervcellerna som utgår från snäckan. Snäckan är det organ som omvandlar ljudets mekaniska energi till elektriska signaler i hörselnerven. Hörselnerven förmedlar signalerElectrocochleography (ECoG) is an objective method to evaluate cochlear electrophysiology. The recordings are considered to reflect the mechano-electric processes of the cochlea, and can indicate the presence of suspected endolymphatic hydrops. The aim of the present thesis was to investigate the value of transtympanic (TT) ECoG in the clinical diagnosis and management of Menière´s disease. The tr