Primary Cilia Are Frequently Present in Small Cell Lung Carcinomas but Not in Non-Small Cell Lung Carcinomas or Lung Carcinoids.

Most human malignant neoplasms show loss of primary cilia (PC). However, PC are known to be retained and involved in tumorigenesis in some types of neoplasms. The PC status in lung carcinomas remains largely uninvestigated.

Temperature Regulation of Supercooling and Gut Nucleation in Relation to Diapause of Pyrrhocoris apterus (L.) (Heteroptera).

The heteropteran Pyrrhocoris apterus (L.) does not survive freezing of its body fluids; there is a good correlation between values of survival at subzero temperatures and the supercooling point (SCP), i.e.

CRYOPRESERVATION OF SEA URCHIN EMBRYOS AND SPERM.

A simple method for preserving live sea urchin embryos and sperm in liquid nitrogen (LN) wasdeveloped through the use of DMSO as a cryoprotective additive. Samples of late embryos in double test tubes were cooled to- I96°C by two-step freezing, first to - 76°C and then by plunging in LN. In the case of fertilized eggs, samples were previously frozen to - 40°C, at which temperature the samples were kept for 15 min; they were then transferred into LN.