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T. Ross 《Journal of industrial microbiology & biotechnology》1993,12(3-5):180-189
Summary Square-root (or Ratkowsky) models are a special case of Blehrádek's temperature rate-relationship first published in 1926 and widely used in several fields of biology. Blehrádek-type models also describe microbial growth, and have been extended for use in food microbiology by the inclusion of terms for water activity and pH. The parameters of the square root-type models are defined and their determination described. Favorable features of square root-type models include parsimony, parameter estimation properties, and ease of use. Square root-type models have been developed for a number of organisms of concern to the food industry and have also been adopted for use in a number of electronic devices used in predictive microbiology. Criticisms of square root-type models are also considered.Mention of brand or firm names does not constitute an endorsement by the US Department of Agriculture over others of a similar nature not mentioned. 相似文献
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Karel Hrubý 《Biologia Plantarum》1961,3(1):75-84
Mezidruhový hybridSalvia němecii (S. nutans x 8. juri?i?ii), popsaný autorem ji? d?íve, je plně plodný. Proto byly na 238 rostlinách F2 generace sledovány tyto znaky: typ svazk? cévních v 159;apíku, poměr délky ?apíku k délce ?epele, délko?í?kový index ?epele listové a ?lenitost ?epele, vyjád?ená poměrem ideální obrysové ploehy listu k jeho skute?né plo?e. V?ecky tyto charakteristiky srovnány se situací u rodi?ovských druh? i F1 hybrida. Bylo zji?těno:
- 1.Typ II svazk? cévních je jednodu?e a úplně dominantní nad typem III (?těpný poměr 172 : 66, X2(1) = 0.94, p =0–35)., 相似文献