Degradation of bacterial lipopolysaccharide by gut juice os the snail Helix pomatia.

Lipopolysaccharides from several bacteria were selectively degarded by gut juice of the snail Helix pomatia with extensive loss of anticomplementary activity and changes in the electrophoretic pattern in polyacrylamide gels. The gut juice had little effect on ketodeoxyoctonate content or immunodominant sugars. The lipid A moiety of the lipopolysaccharide appeared to be the main site of attack.     

Superiority of human complement for assaying bacterial lipopolysaccharides by their anticomplementary activity.

In assaying bacterial lipopolysaccharides (LPS) for anticomplementary activity, human complement (C) allowed detection of approximately 200 times smaller amounts of LPS than guinea-pigs C. Pig C was slightly inferior to human.     

Degradation of bacterial lipopolysaccharide by gut juice of the snailHelix pomatia

Summary Lipopolysaccharides from several bacteria were selectively degraded by gut juice of the snailHelix pomatia with extensive loss of anticomplementary activity and changes in the electrophoretic pattern in polyacrylamide gels. The gut juice had little effect on ketodeoxyoctonate content or immunodominant sugars. The lipid A moiety of the lipopolysaccharide appeared to be the main site of attack.     

多项式微分系统的不变直线的不同斜率的最大个数

本文证明了公式β（ｎ）＝σ（ｎ－１）＋１其中α（ｎ－１）是ｎ－１次多项式微分系统的不为直线的最多条数，βｎ）是ｎ次多项式微分系统的不变直线的不同斜率的最大个数。这里假设所讨论的多项式系统只有限条不变直线。     

Parasitoid secretions provoke ant warfare

Insect social parasites are extreme specialists that typically use mimicry or stealth to enter ant colonies to exploit the rich, but fiercely protected, resources within their nests. Here we show how a parasitic wasp (parasitoid) contrives to reach its host, itself an endangered species of social parasite that lives inside the brood chambers of ant nests, by releasing semiochemicals to induce in-fighting between worker ants, locking the colony in combat and leaving it underprotected. Four of these chemicals are new to biology and have the potential to control pest species by inducing different agonistic behaviours in ants.     

Superiority of human complement for assaying bacterial lipopolysaccharides by their anticomplementary activity

Summary In assaying bacterial lipopolysaccharides (LPS) for anticomplementary activity, human complement (C) allowed detection of approximately 200 times smaller amounts of LPS than guinea-pig C. Pig C was slightly inferior to human.