Influence of nutrient supply and water vapour pressure on root architecture of Douglas-fir and western hemlock seedlings.

Root growth responses of Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco] and western hemlock (Tsuga heterophylla Raf. Sarg.

Unusual intestinal lamellae in the nematode Rhabditophanes sp. KR3021 (Nematoda: Alloinematidae).

The free-living nematode Rhabditophanes sp. has recently been placed in a clade of animal parasites and may be a unique example of a reversal to a nonparasitic lifestyle. Detailed morphological analysis of the intestine reveals the unusual and unique structure of splitting microlamellae forming a meshwork with cavities along the entire intestinal tract.

Nutrition, xylem cavitation and drought resistance in hybrid poplar.

Effects of mineral nutrition on susceptibility to cavitation were examined in four hybrid poplar clones. Two drought-sensitive and two drought-resistant hybrid clones of black cottonwood (Populus trichocarpa Torr. & Gray) and eastern cottonwood (P.

Nitrogen and potassium effects on xylem cavitation and water-use efficiency in poplars.

Effects of N and K nutrition on drought and cavitation resistance were examined in six greenhouse-grown poplar clones: Populus trichocarpa (Torr. & Gray) and its hybrids with P. deltoides Bartr.

Germination of Bacillus thuringiensis spores in bacteriophagous nematodes (Nematoda: Rhabditida).

During screening of Bacillus thuringiensis isolates for nematicidal activity it was observed that spores of B. thuringiensis germinated in the intestine of bacteriophagous nematodes in the presence of antibiotics. This phenomenon was studied more closely by scanning electron microscopy.

Root growth and water use efficiency of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) and lodgepole pine (Pinus contorta Dougl.) seedlings.

One-year-old Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) and lodgepole pine (Pinus contorta Dougl.) seedlings were grown for 17 weeks in 100-cm deep, 7.

Absolute and relative growth of Douglas-fir seedlings of different sizes.

Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seedlings of a single seed source were grown in a bare-root nursery for two years to produce five different stock types by varying spacing and transplanting treatments. They were then planted in the forest together with one-year-old container seedlings of the same seed source, which constituted a sixth treatment.

New root growth of Douglas-fir seedlings at low carbon dioxide concentration.

New root growth of conifer nursery seedlings is dependent on light, but whether this is necessary only for photosynthesis, or also has some other root growth promoting effect is unknown. This question was investigated using one-year-old Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seedlings grown at two nurseries from the same seed lot and taken from cold storage in March and April.

[Osteoid osteoma of the spine].

High resolution CT has become crucial to the definite diagnosis, accurate localisation and extension of benign spinal tumors. An osteoid osteoma mostly suspected by X-ray or scintigraphy, located in the axial skeleton--mainly of spongious content and with a complex anatomical structure--will be definitely more distinctly visualized on CT. Post-operative evaluation also requires CT.

Development of a radio-immuno-assay for oxytocin.

High affinity antibodies against oxytocin were produced by multiple intradermal injections. The antibodies do not cross react with lysine vasopressin. Reduction of the S-S link changes the immunoreactivity.