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Radiocarbon constraints on the Holocene flood deposits of the Ning-Zhen Mountains, lower Yangtze River area of China

Lying athwart both the temperate and subtropical zones, the Ning-Zhen Mountains are particularly prone to extreme floods in the summer months when cold fronts collide with the subtropics-derived warm airmasses. The Holocene flood deposits in the region may provide a long-term perspective on hydrographical change and its palaeoclimatic implications. Radiocarbon dates on carbonised wood preserved in

Neurophysiological recovery after hypoglycemic coma in the rat: correlation with cerebral metabolism

Recovery of electroencephalographic activity and somatosensory evoked responses was studied in paralyzed and lightly anesthetized (70% N2O) rats in which profound hypoglycemia had been induced by insulin administration. The duration of severe hypoglycemia was defined as the duration of a flat electroencephalogram (EEG) recording (5, 30, and 60 min, respectively) before restitution with glucose. Th

Surveys on attitudes towards legalisation of euthanasia: importance of question phrasing

Aim: To explore whether the phrasing of the questions and the response alternatives would influence the answers to questions about legalisation of euthanasia. Methods: Results were compared from two different surveys in populations with similar characteristics. The alternatives "positive'', "negative'', and "don't know'' (first questionnaire) were replaced with an explanatory text, "no legal sanct

Zileuton added to low-dose inhaled beclomethasone for the treatment of moderate to severe persistent asthma

Objective: To assess the therapeutic effects of oral zileuton tablets combined with low-dose beclomethasone compared to doubling the dose of beclomethasone, in improving lung function and reducing asthma symptoms. Methods: Randomized, active-controt, double-blind, parallel, multi-center study of zileuton (400 or 600mg QID)+200 mu g beclomethasone dipropionate (BDP) BID versus ptacebo+BDP 400pg BID

Synthesis of Nb-doped SrTiO3 by a modified glycine-nitrate process

The objective of the present investigation was to develop a technique to synthesize submicronic particles of Nb-doped strontium titanate with a homogeneous composition. This was achieved by a modified glycine-nitrate process, using Ti-lactate, Nb-oxalate, and Sr(NO3)(2) as starting materials. A combination of both citric acid and glycine was needed in order to integrate the useful features of both

In vitro molecular evolution of antibody genes mimicking receptor revision

Antibody evolution in vivo proceeds mainly by stepwise improvements, accomplished by single base pair substitutions. Lately, receptor revision, i.e. exchange of large parts of the V gene for another sequence, has been suggested to provide a complementary route for affinity maturation. By employing a receptor revision like evolution process in vitro using combinatorial libraries and phage display s

The contribution of photosynthetic pigments to the development of biochemical separation methods: 1900-1980

The role of photosynthetic pigments in the development of separation methods in biochemistry during the period 1900-1980 is described beginning with M. Tswett who introduced separation of chlorophylls and carotenoids on columns and coined the term chromatography in 1906. In Uppsala, T. Svedberg developed the ultracentrifuge in the 1920s. A. Tiselius improved electrophoresis in the 1930s and develo

Essays on Interest Groups and Trade Policy

This thesis explores the relationship between domestic political processes and interindustry variations in unilateral and multilateral trade policies. The literature on endogenous protection is extended to account for the potential importance of information flows, to explore the consequences of adapting the analyses to political systems which differ from the American kind, and to build a framework

Watching ultrafast barrierless excited-state isomerization of pseudocyanine in real time

The photoinduced excited-state processes in 1,1'-diethyl-2,2'-cyanine iodine are investigated using femtosecond time-resolved pump-probe spectroscopy. Using a broad range of probe wavelengths, the relaxation of the initially prepared excited-state wavepacket can be followed down to the sink region. The data directly visualize the directed downhill motion along the torsional reaction coordinate and

Multiplex AMPLICOR PCR screening for Chlamydia trachomatis and Neisseria gonorrhoeae in women attending non-sexually transmitted disease clinics. The European Chlamydia Epidemiology Group

A new PCR kit (AMPLICOR CT/NG; Roche Diagnostic Systems, Inc., Branchburg, N.J.) was used as a screening tool for the detection of Chlamydia trachomatis and Neisseria gonorrhoeae in first-void urine (FVU) specimens from 3,340 asymptomatic women attending European health care units for contraceptive advice or pregnancy termination. All samples were kept frozen (-20 degrees C) prior to testing. Chla

Simultaneous release of hydrophobic and cationic solutes from thin-film "plum-pudding" gels: A multifunctional platform for surface drug delivery?

The release of two compositionally different solutes from a composite gel composed of two different populations of microgel particles embedded in a single bulk gel matrix is described, showing the potential of the "plum-pudding gel" as a multifunctional platform for controlled surface release. One hydrophobic solute (pyrene) and one hydrophobic and charged solute (rhodamine 123) were chosen as the

Biophysics of viral infectivity: matching genome length with capsid size.

In this review, we discuss recent advances in biophysical virology, presenting experimental and theoretical studies on the physical properties of viruses. We focus on the double-stranded (ds) DNA bacteriophages as model systems for all of the dsDNA viruses both prokaryotic and eukaryotic. Recent studies demonstrate that the DNA packaged into a viral capsid is highly pressurized, which provides a f

E-learning and the Interaction

I denna studie insisterar vi över en ny experimentell innovativ idé, nämligen ”live interaktion” via webbkamera. Vi ger, därmed, vår lösning till en bättre och tätare feedback med en hög grad av flexibilitet. Vi jämför våra resultat med campusutbildning.