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Paleontological observations of ancient flora and fauna provide powerful insights into past diversity and relationshipdynamics between organisms and their environments. Diatoms are globally distributed protists thatinfluence major biogeochemical cycles and sustain oceanic food webs. The fossil diatom record extends 120million years back to the Early Cretaceous where rare deposits were discovered w
Betrayal often hits the very foundations of socials bonds: the loyalty of the “We” that we have assumed and taken for granted is broken. This chapter will begin with a discussion of the meaning of betrayal where it is argued that betrayal is a breach of trust, when information is shared, or actions initiated beyond an agreed upon boundary of relations.The image of betrayal is associated with moral
Podcast "Öppet fall" från Lunds universitet, Juridiska fakulteten: Det har gått tio år sedan Sture Bergwall friades från de åtta mord som han dömdes för när han hette Thomas Quick. Vad har det svenska rättssystemet lärt sig av Quickfallet? Kan det hända igen?
Fluorescence, the optical phenomenon whereby short-wavelength light is absorbed and emitted at longer wavelengths, has been widely described in aquatic habitats, in both invertebrates and fish. Recent years have seen a stream of articles reporting fluorescence, ranging from frogs, platypus, to even fully terrestrial organisms such as flying squirrels, often explicitly or implicitly linking the pre
BACKGROUND: In patients with a degenerative tear of the medial meniscus, recent meta-analyses and systematic reviews have shown no treatment benefit of arthroscopic partial meniscectomy (APM) over conservative treatment or placebo surgery. Yet, advocates of APM still argue that APM is cost effective. Giving advocates of APM their due, we note that there is evidence from the treatment of other musc
1. The NAD analogue, N6-[N-(6-aminohexyl)carbamoylmethyl]-NAD, was covalently bound to horse liver alcohol dehydrogenase in a carbodiimide-mediated reaction and in such a way that it was active with the very same enzyme molecule to which it was coupled. 2. The degree of substitution, i.e. the number of NAD analogues per enzyme subunit, could be varied (0.3 - 1.6). In one preparation 1.6 coenzyme m
In steroid transformations some of the advantages of immobilized microorganisms seem to be especially important, since the manufacture of steroid drugs often involves very expensive intermediates and products (1). Therefore, we have been studying two corticosteroid transformations. The first reaction is an 11-β-hydroxylation catalyzed by free or polyacrylamide immobilized Curvularia lunata, pr
The cofactor analogue N6-((6-aminohexyl)-carbamoylmethyl)-NAD was bound to beef heart lactate dehydrogenase by the glutaraldehyde coupling method and the enzyme-coenzyme complex subsequently separated from excess of non-coupled cofactor by gel filtration chromatography. The number of cofactor molecules bound per enzyme molecule could be varied between 0 and 8 by altering the coupling time. The enz
A new AMP derivative substituted with spacer arms both at position N6 and C8 of the adenine moiety was synthesized and immobilized to Sepharose. To the immobilized ligand was subsequently coupled C8-substituted ATP in a solid-phase synthesis fashion yielding the bifunctional general ligand AMP-ATP. This affinity material was used in the separation of two major groups of enzymes, dehydrogenases and
WE describe here the development of a new analytical configuration, called a microbe thermistor, in which immobilised microorganisms are placed in proximity to a thermistor which measures the metabolic heat evolved by them. Many metabolites can thus be analysed, as we show here by the determination of both single components such as glucose and fructose and of more complex mixtures such as casein.
THE marked increase in demand for contraceptives and anti-inflammatory agents such as cortisol and prednisolone, combined with a diminishing supply of steroid raw materials may lead to shortages of steroid drugs1. Thus it is important to develop new sources for steroids as well as to devise more efficient means for steroid conversions. Here we report a new approach to steroid transformation in whi
Phosphorylation of 6‐chloropurine riboside with phosphorus oxychloride and phosphorus trichloride gave a mixture of the two isomers, 6‐chloropurine‐riboside 2′,5′‐bisphosphate and 6‐chloropurine‐riboside 3′,5′‐bisphosphate. Reaction with 1,6‐diaminohexane followed by resolution of the isomeric mixture on a Dowex 1‐X2 column yielded N6‐(6‐aminohexyl)‐adenosine 2′,5′‐bisphosphate and N6‐(6‐amin
