Coping and immunosuppression: inescapable but not escapable shock suppresses lymphocyte proliferation   总被引：10，自引：0，他引：10  

M L Laudenslager  S M Ryan  R C Drugan  R L Hyson  S F Maier 《Science (New York, N.Y.)》1983,221(4610):568-570

Rats were given series of escapable shocks, identical inescapable shocks, or no shock. The subjects were reexposed to a small amount of shock 24 hours later, after which an in vitro measure of the cellular immune response was examined. Lymphocyte proliferation in response to the mitogens phytohemagglutinin and concanavalin A was suppressed in the inescapable shock group but not in the escapable shock group. This suggests that the controllability of stressors is critical in modulating immune functioning.  相似文献   

Accumulation and remobilization of assimilates in different genotypes of durum wheat under terminal drought stress     

Vosoghi Rad  Mehdi  Jami Moeini  Matin  Taherian  Majid  Armin  Mohammad 《Journal of Crop Science and Biotechnology》2022,25(2):199-214

Journal of Crop Science and Biotechnology - The present research was conducted to examine the accumulation and remobilization of some promising lines of durum wheat assimilates using a randomized...  相似文献   

Fungal biotransformation of (+/-)-linalool     

Mirata MA  Wüst M  Mosandl A  Schrader J 《Journal of agricultural and food chemistry》2008,56(9):3287-3296

The biotransformation of (+/-)-linalool was investigated by screening 19 fungi. Product accumulation was enhanced by substrate feeding and, for the first time, lilac aldehydes and lilac alcohols were identified as fungal biotransformation byproduct using SPME-GC-MS headspace analysis. Aspergillus niger DSM 821, Botrytis cinerea 5901/02, and B. cinerea 02/FBII/2.1 produced different isomers of lilac aldehyde and lilac alcohol from linalool via 8-hydroxylinalool as postulated intermediate. Linalool oxides and 8-hydroxylinalool were the major products of fungal (+/-)-linalool biotransformations. Furanoid trans-(2 R,5 R)- and cis-(2 S,5 R)-linalool oxide as well as pyranoid trans-(2 R,5 S)- and cis-(2 S, 5 S)-linalool oxide were identified as the main stereoisomers with (3 S,6 S)-6,7-epoxylinalool and (3 R,6 S)-6,7-epoxylinalool as postulated key intermediates of fungal (+/-)-linalool oxyfunctionalization, respectively. With a conversion yield close to 100% and a productivity of 120 mg/L.day linalool oxides, Corynespora cassiicola DSM 62485 was identified as a novel highly stereoselective linalool transforming biocatalyst showing the highest productivity reported so far.  相似文献   

Difference in benthic invertebrate communities of headwater streams can be detected using a short elevation gradient     

Namayandeh  Armin  Beresford  David V.  Somers  Keith M.  Dillon  Peter J. 《International Aquatic Research》2018,10(2):153-164

International Aquatic Research - Communities of benthic invertebrates from a series of intermittent headwater streams spanning over a short elevation gradient (i.e.,...  相似文献