Ruminant production contributes to emissions of nitrogen (N) to the environment, principally ammonia (NH3), nitrous oxide (N2O) and di-nitrogen (N2) to air, nitrate (NO3 -) to groundwater and particulate N to surface waters. Variation in dietary N intake will particularly affect excretion of urinary N, which is much more vulnerable to losses than is faecal N. Our objective is to review dietary ...

A lanthanide-functionalized MOF with extremely high water tolerance was developed as a fluorescent probe for hippuric acid (HA) in urine which is considered as the biological indicators of toluene exposure. For the first time, the urinary HA was detected by fluorescence spectrometry based on a recyclable Ln-MOF sensor.

The amino acid glycine is involved not only in protein formation but in t,he synthesis of glutathione, creatine (l), and the protoporphyrin of hemoglobin (2). However, the mechanism by which the animal organism forms glycine is cluite obscure. It has been generally considered that the “nonessential” amino acids are synthesized from a-keto acids either by amination with ammonia or by transaminat...

Various ester and thioester derivatives of hippuric acid have been prepared which were substrates of both beta-lactamases and DD-peptidases. The thioesters were more rapidly hydrolysed by nearly all the enzymes. Surprisingly, the enzymes acted rather efficiently on substrates which did not contain any chiral centre.

The amino acid glycine is involved not only in protein formation but in t,he synthesis of glutathione, creatine (l), and the protoporphyrin of hemoglobin (2). However, the mechanism by which the animal organism forms glycine is cluite obscure. It has been generally considered that the “nonessential” amino acids are synthesized from a-keto acids either by amination with ammonia or by transaminat...