Sediment source fingerprinting: benchmarking recent outputs,remaining challenges and emerging themes     

Collins  Adrian L.  Blackwell  Martin  Boeckx  Pascal  Chivers  Charlotte-Anne  Emelko  Monica  Evrard  Olivier  Foster  Ian  Gellis  Allen  Gholami  Hamid  Granger  Steve  Harris  Paul  Horowitz  Arthur J.  Laceby  J. Patrick  Martinez-Carreras  Nuria  Minella  Jean  Mol  Lisa  Nosrati  Kazem  Pulley  Simon  Silins  Uldis  da Silva  Yuri Jacques  Stone  Micheal  Tiecher  Tales  Upadhayay  Hari Ram  Zhang  Yusheng 《Journal of Soils and Sediments》2020,20(12):4160-4193

Journal of Soils and Sediments - This review of sediment source fingerprinting assesses the current state-of-the-art, remaining challenges and emerging themes. It combines inputs from international...  相似文献   

THE INFLUENCE OF PLANTING DATE ON THE SEED-BEARING CAPACITY OF TILLERS OF PERENNIAL RYEGRASS SPACED PLANTS GROWN FOR SEED     

C. A. Foster 《Grass and Forage Science》1969,24(3):271-276

A study was made of the fate of tillers arising at different times in the autumn and the contribution which these tillers made to the final seed yield of single spaced plants of perennial ryegrass planted at different dates for seed production. The flexibility in tiller function and in seed-bearing capacity exhibited within these plants resulted in October-planted material producing as much seed in the following harvest-year as August-planted material, although the latter had twice as many living tillers per plant at harvest. This reproductive versatility has economic importance and may have biological significance in certain ecological conditions.  相似文献   

Extraction and Activation of Wheat Polyphenol Oxidase by Detergents: Biochemistry and Applications     

Aravind K. Jukanti  Phil L. Bruckner  Debra K. Habernicht  Curt R. Foster  John M. Martin  Andreas M. Fischer 《Cereal Chemistry》2003,80(6):712-716

Polyphenol oxidases (PPOs) from several plant species, including wheat, have been implicated in undesirable brown discolorations of food products. It has been demonstrated that these enzymes are often present in a latent form or are membrane‐associated, necessitating detergent or other treatments to obtain fully active preparations. Here, the influence of different detergents on wheat meal and flour PPOs was investigated. Extraction in presence of 50 mM SDS led to a 5‐ to 15‐fold increase in PPO activity, making quantitative assays in flour from low‐PPO lines more robust. Among a series of additional nonionic, anionic, and cationic detergents tested, only n ‐lauroylsarcosine increased extractable PPO activity to a degree comparable to that of SDS. Additional experiments suggested that a large fraction of wheat meal PPOs may be membrane‐associated and that SDS is able to activate PPOs extracted from high‐activity but not from low‐activity wheat lines. PPO activities assayed after SDS extraction of meal and flour were highly correlated with each other and with activity determined in whole (intact) kernels in absence of SDS. Correlation coefficients between PPO activities measured with all these methods and noodle brightness were about equal, indicating that activities assayed after SDS extraction are useful for germplasm screening and quality prediction.  相似文献