Isomeric lipid signatures reveal compartmentalized fatty acid metabolism in cancer

The cellular energy and biomass demands of cancer drive a complex dynamic between uptake of extracellular FAs and their de novo synthesis. Given that oxidation of de novo synthesized FAs for energy would result in net-energy loss, there is an implication that FAs from these two sources must have distinct metabolic fates; however, hitherto, all FAs have been considered part of a common pool. To probe potential metabolic partitioning of cellular FAs, cancer cells were supplemented with stable isotope-labeled FAs. Structural analysis of the resulting glycerophospholipids revealed that labeled FAs from uptake were largely incorporated to canonical (sn-) positions on the glycerol backbone. Surprisingly, labeled FA uptake also disrupted canonical isomer patterns of the unlabeled lipidome and induced repartitioning of n-3 and n-6 PUFAs into glycerophospholipid classes. These structural changes support the existence of differences in the metabolic fates of FAs derived from uptake or de novo sources and demonstrate unique signaling and remodeling behaviors usually hidden from conventional lipidomics.     

GEOTROPIC ORIENTATION IN ARTHROPODS : I. MALACOSOMA LARV?.

The geotropic orientation of caterpillars of Malacosoma americana during progression upon a surface inclined at angle α to the horizontal is such that the path makes an average angle θ upward on the plane, of a magnitude proportional to log sin α. More precisely, the product (sin α) (sin θ) is constant. This is traced to the fluctuation of the pull of the head region upon the lateral musculature of the upper side during the side to side swinging implicated in progression.     

TEMPERATURE CHARACTERISTICS FOR SPEED OF MOVEMENT OF THIOBACTERIA

The speed of translatory movement of Beggiatoa alba is governed by temperature in such a way that between 5° and 33° the temperature characteristics µ = 16,100 and µ = 8,400 respectively obtain for the temperature ranges 5° to 16.5° and 16.5° to 33°. The "break" at 16°–17° is emphasized by the occurrence of a wider latitude of variation in speed above this temperature. Above 16° the progression of Thiothrix yields µ = 8,300. The possible relation of these values to that previously obtained for similar movement in (photosynthetic) Oscillatoria is commented upon.     

Lengthening the aesthetically short nose

An aesthetically short nose is defined as a developmental deformity in which the nose appears foreshortened. It is characterized by a decreased distance from the nasofrontal angle (NFA) to the tip-defining points (TDP) and an increased nasolabial angle with increased nostril show. A method is described and illustrated for lengthening the aesthetically short nose by rotating the nasal tip in an inferior direction. This rotation results in an actual lengthening, as well as an illusion of lengthening of the nose.     

Herbstzug der Sturmschwalbe (Hydrobates pelagicus) in der Meerenge von Gibraltar

Zusammenfassung Entlang eines Transekts über die Meerenge von Gibraltar wurde der Tagzug von Sturmschwalben von August bis Dezember erfaßt. Für einen Durchzug im Mittelmeer brütender Sturmschwalben konnten keine Hinweise gefunden werden; die meisten Vögel scheinen Angehörige der atlantischen Population zu sein. Die Präsenz ist im Oktober/November am höchsten, wenn südwärts ziehende atlantische Brutvögel die Breiten der Straße von Gibraltar erreichen. Insgesamt machten die ins Mittelmeer einfliegenden Vögel 83 % der nach Osten oder Westen fliegenden aus; Schätzungen ergaben für den Tagzug, daß nur 1100–1700 Sturmschwalben das Mittelmeer verließen (hingegen 6300–9500 einflogen). Die mediterrane Brutpopulation ist auf 12 000 Brutpaare zu schätzen.

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Autumn migration of the Storm PetrelHydrobates plelagicus through the Strait of Gibraltar

Storm petrels were recorded along a transect line in the Strait of Gibraltar from August to the middle of November and in December. No hint for migration of the Mediterranean population through the Strait could be revealed. The presence of Storm Petrels is enhanced in October/November. Throughout autumn about 82 % of the Storm Petrels steadily flying east or west flew east. Estimates yield only 1100–1700 storm petrels leaving, but 6300–9500 entering the Mediterranean during daylight, while about 12,000 pairs are known to breed in the Mediterranean.