... minor L. Elena Albanell1-2, Josefina Plaixats1 and Jose Andres3 1 Departamento ... et al. 196... more ... minor L. Elena Albanell1-2, Josefina Plaixats1 and Jose Andres3 1 Departamento ... et al. 1968, McLaren and Smith 1976, Newton 1974), the fronds become dark green, their area is reduced, and starch accumulates (Newton 1977). On the ...
The objective of this research was to study spontaneously fermented chestnut flour sourdough and ... more The objective of this research was to study spontaneously fermented chestnut flour sourdough and to evaluate its effect in gluten-free bread based on corn starch and chestnut flour. Lactic acid bacteria and yeasts counts, pH and titratable acidity of chestnut flour sourdough were measured during 6 days of sourdough propagation. Chestnut flour sourdough fermented for 5 days with back-slopping every 24 h with 33 % of the ripe sourdough was selected to elaborate gluten-free bread. Control breads contained 15, 20 or 25 % of chestnut flour, and sourdough breads contained the same amount of chestnut flour added as chestnut flour sourdough. Chestnut flour sourdough improved bread specific volume, rendered breads with lighter crusts, reduced crumb hardness at day 0 and day 7 and reduced pH. However, chestnut flour sourdough had no effect on yeasts and molds growth during 7 days of bread storage and did not influence sensory characteristics perceived by consumers.
Lactation artificially induced (ART) by steroid hormones and natural lactation (NAT) after lambin... more Lactation artificially induced (ART) by steroid hormones and natural lactation (NAT) after lambing were compared in 2 dairy sheep breeds (Manchega and Lacaune) in 2 experiments conducted during winter and spring. In experiment 1, ART ewes (14 Manchega and 9 Lacaune) were induced into lactation in winter by the standard protocol, which consisted of s.c. injections of estradiol and progesterone administered in 2 portions daily from d 1 to 7. Hydrocortisone acetate was injected s.c. daily on d 18 to 20. Milking was initiated on d 21 and continued for 13 wk. A similar group of NAT ewes was selected for the contemporary comparison of NAT vs. ART lactation. All Lacaune ewes, but only 3 of the 14 Manchega ewes (21%), were successfully induced into lactation. Despite the successful induction of lactation in Lacaune ewes, milk yield was much lower than that obtained in NAT lactation (1.23 +/- 0.14 vs. 2.51 +/- 0.15 L/ d). Milk composition from wk 5 to 13 did not differ between groups, except...
ABSTRACT Physiological and nutritional changes of dairy goats for maintaining milk yield during e... more ABSTRACT Physiological and nutritional changes of dairy goats for maintaining milk yield during extreme heat stress conditions at late lactation
Queda prohibida la reproducció, transformació, distribució i comunicació pública d'aquesta o... more Queda prohibida la reproducció, transformació, distribució i comunicació pública d'aquesta obra. Es permet, en tot cas, la reproducció per a ús privat sempre i quan la còpia que se'n faci no sigui objecte d'utilització col· lectiva ni lucrativa (art. 31.2 del Reial Decret ...
Les jornades d’innovacio docent a la Facultat de Veterinaria tenen per objectiu l'intercanvi ... more Les jornades d’innovacio docent a la Facultat de Veterinaria tenen per objectiu l'intercanvi d'experiencies docents entre el professorat de la Facultat com a punt de partida per reflexionar sobre l’estat actual de la docencia i estimular la inclusio de noves activitats d'innovacio als estudis de grau. Aquestes jornades estan organitzades pel Grup d'Innovacio Docent de la Facultat de Veterinaria amb el suport de la Unitat de Formacio i Innovacio Docent (OQD) de la Universitat Autonoma de Barcelona.
Abstract Faecal indices are used to describe spatiotemporal patterns of diet quality in wild herb... more Abstract Faecal indices are used to describe spatiotemporal patterns of diet quality in wild herbivores, and near infrared spectroscopy methods (NIRS) distinctively reduce costs and labour compared to conventional chemical analyses. In this study we compared the prediction accuracy of faecal nitrogen (N), ash and fibrous fractions of a laboratory instrument (NIRS) with that of a lightweight portable instrument (VisNIRS) using faecal samples of Alpine ibex (Capra ibex). We then compared how different indices based on faecal N and fibrous fractions were able to detect the expected temporal trend and difference between sexes in diet quality, and verified whether the presumably lower accuracy of NIRS and VisNIRS (compared to wet chemistry) influenced the ability of indices to detect such trends. The laboratory NIRS was more accurate than the portable VisNIRS, especially for fibrous fractions. Predicted data from both instruments clearly identified the temporal trend identified by chemically analysed data, but only NIRS identified the small difference between sexes. Expressing faecal N as a proportion of organic matter (OM) or neutral detergent fibre (NDF) improved the power of the index as compared to expressing it as a proportion of dry matter (DM), irrespective of the method used to estimate the data. Faecal NDF contents followed the patterns expected from the variation of faecal N, while faecal acid detergent fibre (ADF) and especially lignin (ADL) followed contradictory patterns, which might be due to a selection of different forage sources rather than to changing quality of a homogenous forage source. We conclude that expressing faecal N as a proportion of OM is advised with wild herbivores faeces, where ash content can be biased by accidental soil contamination or ingestion. Faecal fibrous fractions are useful to complement faecal N and to avoid simplified interpretations of the results. For this purpose, NIRS methods can be extremely useful to predict multiple indices on large numbers of samples. VisNIRS portable instruments might be unable to detect subtle biological patterns in small numbers of samples. However, developing procedures for portable instruments outside laboratory facilities might further improve practicability, cost effectiveness, and, through allowing on-field predictions on large numbers of samples, power of statistical testing of diet quality indices.
... minor L. Elena Albanell1-2, Josefina Plaixats1 and Jose Andres3 1 Departamento ... et al. 196... more ... minor L. Elena Albanell1-2, Josefina Plaixats1 and Jose Andres3 1 Departamento ... et al. 1968, McLaren and Smith 1976, Newton 1974), the fronds become dark green, their area is reduced, and starch accumulates (Newton 1977). On the ...
The objective of this research was to study spontaneously fermented chestnut flour sourdough and ... more The objective of this research was to study spontaneously fermented chestnut flour sourdough and to evaluate its effect in gluten-free bread based on corn starch and chestnut flour. Lactic acid bacteria and yeasts counts, pH and titratable acidity of chestnut flour sourdough were measured during 6 days of sourdough propagation. Chestnut flour sourdough fermented for 5 days with back-slopping every 24 h with 33 % of the ripe sourdough was selected to elaborate gluten-free bread. Control breads contained 15, 20 or 25 % of chestnut flour, and sourdough breads contained the same amount of chestnut flour added as chestnut flour sourdough. Chestnut flour sourdough improved bread specific volume, rendered breads with lighter crusts, reduced crumb hardness at day 0 and day 7 and reduced pH. However, chestnut flour sourdough had no effect on yeasts and molds growth during 7 days of bread storage and did not influence sensory characteristics perceived by consumers.
Lactation artificially induced (ART) by steroid hormones and natural lactation (NAT) after lambin... more Lactation artificially induced (ART) by steroid hormones and natural lactation (NAT) after lambing were compared in 2 dairy sheep breeds (Manchega and Lacaune) in 2 experiments conducted during winter and spring. In experiment 1, ART ewes (14 Manchega and 9 Lacaune) were induced into lactation in winter by the standard protocol, which consisted of s.c. injections of estradiol and progesterone administered in 2 portions daily from d 1 to 7. Hydrocortisone acetate was injected s.c. daily on d 18 to 20. Milking was initiated on d 21 and continued for 13 wk. A similar group of NAT ewes was selected for the contemporary comparison of NAT vs. ART lactation. All Lacaune ewes, but only 3 of the 14 Manchega ewes (21%), were successfully induced into lactation. Despite the successful induction of lactation in Lacaune ewes, milk yield was much lower than that obtained in NAT lactation (1.23 +/- 0.14 vs. 2.51 +/- 0.15 L/ d). Milk composition from wk 5 to 13 did not differ between groups, except...
ABSTRACT Physiological and nutritional changes of dairy goats for maintaining milk yield during e... more ABSTRACT Physiological and nutritional changes of dairy goats for maintaining milk yield during extreme heat stress conditions at late lactation
Queda prohibida la reproducció, transformació, distribució i comunicació pública d'aquesta o... more Queda prohibida la reproducció, transformació, distribució i comunicació pública d'aquesta obra. Es permet, en tot cas, la reproducció per a ús privat sempre i quan la còpia que se'n faci no sigui objecte d'utilització col· lectiva ni lucrativa (art. 31.2 del Reial Decret ...
Les jornades d’innovacio docent a la Facultat de Veterinaria tenen per objectiu l'intercanvi ... more Les jornades d’innovacio docent a la Facultat de Veterinaria tenen per objectiu l'intercanvi d'experiencies docents entre el professorat de la Facultat com a punt de partida per reflexionar sobre l’estat actual de la docencia i estimular la inclusio de noves activitats d'innovacio als estudis de grau. Aquestes jornades estan organitzades pel Grup d'Innovacio Docent de la Facultat de Veterinaria amb el suport de la Unitat de Formacio i Innovacio Docent (OQD) de la Universitat Autonoma de Barcelona.
Abstract Faecal indices are used to describe spatiotemporal patterns of diet quality in wild herb... more Abstract Faecal indices are used to describe spatiotemporal patterns of diet quality in wild herbivores, and near infrared spectroscopy methods (NIRS) distinctively reduce costs and labour compared to conventional chemical analyses. In this study we compared the prediction accuracy of faecal nitrogen (N), ash and fibrous fractions of a laboratory instrument (NIRS) with that of a lightweight portable instrument (VisNIRS) using faecal samples of Alpine ibex (Capra ibex). We then compared how different indices based on faecal N and fibrous fractions were able to detect the expected temporal trend and difference between sexes in diet quality, and verified whether the presumably lower accuracy of NIRS and VisNIRS (compared to wet chemistry) influenced the ability of indices to detect such trends. The laboratory NIRS was more accurate than the portable VisNIRS, especially for fibrous fractions. Predicted data from both instruments clearly identified the temporal trend identified by chemically analysed data, but only NIRS identified the small difference between sexes. Expressing faecal N as a proportion of organic matter (OM) or neutral detergent fibre (NDF) improved the power of the index as compared to expressing it as a proportion of dry matter (DM), irrespective of the method used to estimate the data. Faecal NDF contents followed the patterns expected from the variation of faecal N, while faecal acid detergent fibre (ADF) and especially lignin (ADL) followed contradictory patterns, which might be due to a selection of different forage sources rather than to changing quality of a homogenous forage source. We conclude that expressing faecal N as a proportion of OM is advised with wild herbivores faeces, where ash content can be biased by accidental soil contamination or ingestion. Faecal fibrous fractions are useful to complement faecal N and to avoid simplified interpretations of the results. For this purpose, NIRS methods can be extremely useful to predict multiple indices on large numbers of samples. VisNIRS portable instruments might be unable to detect subtle biological patterns in small numbers of samples. However, developing procedures for portable instruments outside laboratory facilities might further improve practicability, cost effectiveness, and, through allowing on-field predictions on large numbers of samples, power of statistical testing of diet quality indices.
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