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The objective of the study was to investigate the effect of propylene glycol (PG) allocation on concentrations of milk metabolites with potential use as indicators of glucogenic status in high yielding postpartum dairy cows. At time of calving, nine ruminally cannulated Holstein cows were randomly assigned to ruminal dosing of 500 g/d tap water (CON, n = 4) or 500 g/d PG (PPG, n = 5). The PG was given with the morning feeding week 1–4 postpartum (treatment period) and cows were further followed during week 5–8 postpartum (follow-up period). All cows were fed the same postpartum diet. Milk samples were obtained at each milking (3 times/d) in the treatment period, and at morning milking during the follow-up period. Weekly blood samples were obtained from –4 to +8 weeks relative to calving and daily blood samples from –7 until +7 d relative to calving. The main effect of PG allocation was an increased glucogenic status, e.g. visualised by a prompt marked increase in blood fructosamine. During the treatment period, milk concentration of free glucose tended to be greater, whereas milk concentrations of isocitrate and BHBA were lower for PPG compared with CON. It is proposed that the ratio between free glucose and isocitrate in milk may be a potential biomarker for glucogenic status in the vulnerable early postpartum period. We will pursue this issue in the future.
The ancient Anatolian city of Kanesh (present-day Kültepe, Turkey) was a continuously inhabited site from the early Bronze Age through Roman times. The city flourished c.2000–1750 BCE as an Old Assyrian trade outpost and the earliest attested commercial society in world history. More than 23,000 elaborate clay tablets from private merchant houses provide a detailed description of a system of long-distance trade that reached from central Asia to the Black Sea region and the Aegean. The texts record common activities such as trade between Kanesh and the city state of Assur, and between Assyrian merchants and local people. The tablets tell us about the economy as well as the culture, language, religion, and private lives of individuals we can identify by name, occupation, and sometimes even personality. This book presents an in-depth account of this vibrant Bronze Age Anatolian society, revealing the daily lives of its inhabitants.