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Journal of Dairy Research

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https://www.readbyqxmd.com/read/29144210/a-new-allele-of-the-kappa-casein-gene-in-local-zebu-cattle-breeds
#1
Tauseef Ahmad, Ashwin Atkulwar, Sameera Farah, Vijendra Singh, Mumtaz Baig
Local zebu cattle breeds in Indian villages are crossbred with exotic breeds at an unprecedented rate without utilising the full potential of genomic technologies. In addition to agriculture produce, livestock, particularly cattle, constitute a vital source of livelihood for farmers in India. Age-old agricultural practices, errant monsoon, and frequent crop failures have resulted in Maharashtra having the highest number of farmer suicides in the country. Local cattle breeds are considered low-yield breeds and thus are primarily used as beasts of burden...
November 16, 2017: Journal of Dairy Research
https://www.readbyqxmd.com/read/29125094/inferring-individual-cow-effects-dairy-system-effects-and-feeding-effects-on-latent-variables-underlying-milk-protein-composition-and-cheese-making-traits-in-dairy-cattle
#2
Christos Dadousis, Claudio Cipolat-Gotet, Stefano Schiavon, Giovanni Bittante, Alessio Cecchinato
We examined the latent structure of 26 cheese related phenotypes in dairy cattle. Traits related to milk yield and quality (8 traits), milk protein fractions (8 traits), coagulation and curd firmness indicators (CF, 5 traits) and cheese-making phenotypes (cheese yields (%CY) and nutrient recoveries in the curd (REC), 5 traits) were analysed through multivariate factor analysis (MFA) using a varimax rotation. All phenotypes were measured in 1264 Brown Swiss cows. Ten mutual orthogonal, latent variables (factors; Fs) were obtained explaining 74% of the original variability...
November 10, 2017: Journal of Dairy Research
https://www.readbyqxmd.com/read/29125086/effects-of-management-practices-on-the-welfare-of-dairy-donkeys-and-risk-factors-associated-with-signs-of-hoof-neglect
#3
Francesca Dai, Giulia Segati, Marta Brscic, Matteo Chincarini, Emanuela Dalla Costa, Lorenzo Ferrari, Faith Burden, Andrew Judge, Michela Minero
This Research Paper aimed to investigate donkey welfare in dairy husbandry systems and to identify the potential factors affecting it at animal level. In 2015, twelve dairy donkey farms (19-170 donkeys per farm, mean = 55 ± 48), distributed throughout Italy, were visited. On each farm, the Animal Welfare Indicators (AWIN) welfare assessment protocol for donkeys was used by two trained assessors to evaluate the welfare of animals for a total of 257 donkeys assessed. The protocol includes animal-based indicators that were entered in a digitalised system...
November 10, 2017: Journal of Dairy Research
https://www.readbyqxmd.com/read/28965495/behaviour-of-lactose-with-the-presence-of-lactic-acid-and-ca-as-affected-by-ph
#4
Jayani Chandrapala, Claire Gauthier, Todor Vasiljevic
Contradictory statements about the effects of pH change on crystallisation behaviour of lactose exist in the literature. Considering the importance of addressing the processability issue of acid whey, a systematic study is required to establish lactose crystallisation behaviour in the presence of LA and Ca at concentrations present in real acid whey waste streams emphasising impact of pH. Structural modifications of lactose were evident at elevated, more neutral pH in the presence of 1% w/w LA and 0·12% w/w Ca...
October 2, 2017: Journal of Dairy Research
https://www.readbyqxmd.com/read/28934997/teatcups-with-automatic-valves-in-machine-milking-of-goats
#5
Alberto Manzur, José Ramón Díaz, Nemesio Fernández, Sebastià Balasch, Cristòfol Peris
This Research Paper addresses the hypothesis that using teatcups with automatic valves, without cutting off the vacuum prior to cluster removal, could increases the risk of mastitis and affect other milking variables on goats. A first trial used 46 intramammary infection (IMI)-free goats that had been milked with normal teatcups (without automatic valves) during a pre-experimental period of 8 ± 2 d postpartum. These animals were divided into two groups (n = 23), randomly assigning each group to teatcups with automatic valves (teatcups A) or without automatic valves (teatcups B) for a 20-week experimental period...
September 22, 2017: Journal of Dairy Research
https://www.readbyqxmd.com/read/28929997/seasonal-variation-in-the-composition-and-processing-characteristics-of-herd-milk-with-varying-proportions-of-milk-from-spring-calving-and-autumn-calving-cows
#6
Yingchen Lin, James A O'Mahony, Alan L Kelly, Timothy P Guinee
The study investigated the seasonal changes in the compositional, physicochemical and processing characteristics of milk from a mixed-herd of spring- and autumn-calving cows during the year 2014-2015. The volume proportion of autumn-calving milk (% of total milk) varied with season, from ~10-20 in Spring (March-May), 5-13 in Summer (June-August), 20-40 in Autumn (September-November) and 50-100 in Winter (December-February). While all characteristics varied somewhat from month to month, variation was inconsistent, showing no significant trend with progression of time (year)...
September 20, 2017: Journal of Dairy Research
https://www.readbyqxmd.com/read/28929994/effect-of-chelators-on-functionality-of-milk-protein-concentrates-obtained-by-ultrafiltration-at-a-constant-ph-and-temperature
#7
Lata Ramchandran, XiaoXia Luo, Todor Vasiljevic
Modulating conditions during ultrafiltration of skim milk appears to be a feasible strategy to obtain milk protein concentrates (MPC) with tailored functionalities. Adjustment of pH and process temperature attenuated properties of casein micelle resulting in enhanced emulsification capacity. Additional pre-treatment options such as addition of calcium chelators can further impact on the functionality of MPC by modifying the calcium distribution and casein micelle integrity. The objective of the project was to establish effects of pre-treating skim milk with calcium chelators (EDTA or citrate) in concentrations between 10 to 30 mm prior to UF on the physical properties of the feed, corresponding retentates and dried MPC, including particle size, zeta potential and calcium distribution in skim milk and the corresponding retentates, as well as the physical functionalities such as solubility, heat stability and emulsifying properties...
September 20, 2017: Journal of Dairy Research
https://www.readbyqxmd.com/read/28929993/reduced-claw-vacuum-and-b-phase-during-low-milk-flow-does-not-impact-oxytocin-release-and-milking-performance
#8
Anna-Lena Neuheuser, Ann-Catherine Schwinn, Olga Wellnitz, Lorenzo E Hernández-Castellano, Rupert M Bruckmaier
Oxytocin release, milking characteristics, and teat condition were investigated with reduced claw vacuum and pulsation settings compared to milking at regular settings with or without pre-stimulation. The reduced vacuum and pulsation settings during low milk flow are expected to protect the teat tissue before the occurrence of milk ejection at the start of milking, and at the end of milking during a potential overmilking period, i.e. at a milk flow <200 g/min. Seven cows were machine-milked either after a 60 s manual pre-stimulation, or without pre-stimulation and reduced vacuum and pulsation settings, or at full vacuum and normal pulsation during the start of milking...
September 20, 2017: Journal of Dairy Research
https://www.readbyqxmd.com/read/28929991/effects-of-different-dosages-of-propylene-glycol-in-dry-cows-and-cows-in-early-lactation
#9
Michaela Maurer, Walter Peinhopf, Jutta Gottschalk, Almut Einspanier, Gabor Koeller, Thomas Wittek
In this Research Paper we hypothesised that the temporary insulin resistance seen during the transition period in dairy cows may cause significant differences in the efficacy of PG at different sampling periods and that in some cases this effect will be dose dependent. Eighty four sampling sets were generated by studying 7 multiparous Holstein cows repeatedly at 4 sampling periods of 3 d length (dry cows: days 40, 39 and 38 antepartum; close up cows: days 10, 9 and 8 antepartum; fresh cows: days 3, 4 and 5 post-partum; lactating cows: days 38, 39 and 40 post-partum)...
September 20, 2017: Journal of Dairy Research
https://www.readbyqxmd.com/read/28929983/genetic-perspective-of-milk-yield-persistency-in-the-first-three-lactations-of-iranian-buffaloes-bubalus-bubalis
#10
Navid Ghavi Hossein-Zadeh, Mohammad Ali Nazari, Abdol Ahad Shadparvar
The objectives of this study were to estimate the genetic parameters and genetic trends for different measures of persistency (PM) for milk yield in Iranian buffaloes using a random regression test day model. Test day records of the first three lactations of buffaloes within 715 herds comprising 43 014, 38 941 and 33 937 records, respectively, were obtained from the Animal Breeding Center of Iran during 1992 to 2012. Legendre polynomial functions were chosen to fit the lactation curves in the framework of a random regression test day model for estimating (co)variance components...
September 20, 2017: Journal of Dairy Research
https://www.readbyqxmd.com/read/28929978/a-new-study-of-the-kinetics-of-curd-production-in-the-process-of-cheese-manufacture
#11
Susana Vargas Muñoz, Maykel González Torres, Francisco Quintanilla Guerrero, Rogelio Rodríguez Talavera
We studied the role played by temperature and rennet concentration in the coagulation process for cheese manufacture and the evaluation of their kinetics. We concluded that temperature is the main factor that determines the kinetics. The rennet concentration was unimportant probably due to the fast action of the enzyme chymosin. The Dynamic light scattering technique allowed measuring the aggregate's size and their formation kinetics. The volume fraction of solids was determined from viscosity measurements, showing profiles that are in agreement with the size profiles...
September 20, 2017: Journal of Dairy Research
https://www.readbyqxmd.com/read/28929976/response-surface-methodology-as-a-tool-for-modelling-galacto-oligosaccharide-production
#12
Claudia I Vénica, Carina V Bergamini, María C Perotti
The experiments reported in this research paper describe the effects of β-galactosidase enzyme dose and cheese whey amount, on the maximum concentration and yield of galacto-oligosaccahride (GOS) and reaction time. The experimental plan was based on central composite rotational design (CCRD) and modelled by response surface methodology (RSM). The results indicate that the proposed mathematical models could adequately describe the concentration and yield of GOS and the reaction time within the limits of the factors that are being investigated...
September 20, 2017: Journal of Dairy Research
https://www.readbyqxmd.com/read/29154743/editorial-a-year-of-contrasts
#13
Christopher H Knight
No abstract text is available yet for this article.
November 2017: Journal of Dairy Research
https://www.readbyqxmd.com/read/29154742/variation-in-the-toll-like-receptor-4-tlr4-gene-affects-milk-traits-in-dairy-cows
#14
Huitong Zhou, Long Cheng, Hua Gong, Seung O Byun, Grant R Edwards, Jon G H Hickford
The objective of this Research Communication was to use polymerase chain reaction-single stranded conformational polymorphism (PCR-SSCP) analysis to investigate a region of the bovine TLR4 gene (TLR4) in pasture-fed New Zealand (NZ) Holstein-Friesian × Jersey (HF × J) cross dairy cows and to determine whether gene variation was associated with milk production traits. Genetic variation was observed, with two variants (A and B) containing a single nucleotide polymorphism (SNP) (c.2021C/T) that was non-synonymous and putatively results in a p...
November 2017: Journal of Dairy Research
https://www.readbyqxmd.com/read/29154741/identification-of-factors-affecting-colostrum-quality-of-dairy-lacaune-ewes-assessed-with-the-brix-refractometer
#15
Laura Torres-Rovira, Jose-Luis Pesantez-Pacheco, Fernando Hernandez, Laura Elvira-Partida, Maria-Luz Perez-Solana, Juan-Vicente Gonzalez-Martin, Antonio Gonzalez-Bulnes, Susana Astiz
In this Research Communication we assessed factors affecting colostrum quality of dairy Lacaune ewes using the Brix-refractometer. Colostrum from 536 lambings from one commercial intensive dairy Lacaune farm were analysed for the following factors with potential influence in colostrum quality: (1) ewe parity (n = 84-132), (2) length of previous dry period (PDP) (n = 23-214), (3) age at first lambing (AFL) of primiparous ewes (n = 9-88), (4) lambing season (n = 192 or 344), and (5) year (2011-2013, n = 142-203)...
November 2017: Journal of Dairy Research
https://www.readbyqxmd.com/read/29154740/an-association-analysis-between-prl-genotype-and-milk-production-traits-in-italian-mediterranean-river-buffalo
#16
Jun Li, Aixin Liang, Zipeng Li, Chao Du, Guohua Hua, Angela Salzano, Giuseppe Campanile, Bianca Gasparrini, LiGuo Yang
This Research Communication describes the association between genetic variation within the prolactin (PRL) gene and the milk production traits of Italian Mediterranean river buffalo (Bufala mediterranea Italiana). High resolution melting (HRM) techniques were developed for genotyping 465 buffaloes. The association of genetic polymorphism with milk production traits was performed and subsequently the effects of parity and calving season were evaluated. Single nucleotide polymorphisms (SNPs) were identified at exons 2 and 5 and at introns 1 and 2...
November 2017: Journal of Dairy Research
https://www.readbyqxmd.com/read/29154739/oxidative-stress-induced-inflammatory-responses-and-effects-of-n-acetylcysteine-in-bovine-mammary-alveolar-cells
#17
Hyojin Bae, Chang Hee Jeong, Wei Nee Cheng, Kwonho Hong, Han Geuk Seo, Sung Gu Han
Bovine mastitis, an inflammation of the udder, results in reduced milk production and poor milk quality. Mastitis is usually, but not always, a response to pathogen infection. High milk yield can produce oxidative stress in the mammary tissue. High milk yield is also known to be associated with bovine mastitis. Thus, in the current study, we hypothesised that oxidative stress increases inflammatory responses in bovine mammary cells. To examine the hypothesis, we produced cellular oxidative stress and investigated resulting inflammatory responses in bovine mammary alveolar cells (MAC-T)...
November 2017: Journal of Dairy Research
https://www.readbyqxmd.com/read/29154738/validation-of-a-pedometer-algorithm-as-a-tool-for-evaluation-of-locomotor-behaviour-in-dairy-mediterranean-buffalo
#18
Luigi D'Andrea, Jacopo Guccione, Maher Alsaaod, Ramona Deiss, Antonio Di Loria, Adrian Steiner, Paolo Ciaramella
This research communication validates an algorithm to monitor natural occurrence of locomotor behaviours in dairy Mediterranean buffalo based on the output of a 3-dimensional accelerometer (RumiWatch®, pedometer). Several characteristics of the locomotor behaviour were detected with a very high (up-right, lying and standing time) or high degree of correlation (walking time and number of strides) and a low mean difference with the video recording. The proportion of correctly detected events exceeded 99 % for the following variables: stand up and lie down events, as well as number of lying, standing or walking bouts...
November 2017: Journal of Dairy Research
https://www.readbyqxmd.com/read/29154737/significant-changes-in-itih4-ahsg-orm1-and-cd46-content-in-milk-fat-globule-membrane-proteins-of-ketotic-dairy-cows
#19
Sansi Gao, Wei Yang, Hongjiang Yu, Runqi Liu, Zhihao Dong, Hongyou Zhang, Cheng Xia, Chuang Xu
High concentrations of non-esterified fatty acid (NEFA) and β-hydroxybutyrate (BHBA) in cows' blood caused by ketosis are associated with inflammatory states. We hypothesised that ketosis in postparturient dairy cows would result in altered levels on inflammation-related proteins not only in plasma but also in the milk fat globule membranes (MFGM). Thirty cows were selected from a dairy farm in Heilongjiang, China. Inflammatory milk fat globule membrane proteins were detected using ELISA kits, and a fully automatic biochemical analyser was used to measure the concentrations of BHBA, NEFA, glucose (GLU) and triglyceride (TG) in plasma...
November 2017: Journal of Dairy Research
https://www.readbyqxmd.com/read/29154736/lactobacilli-fermented-cow-s-milk-attenuated-lipopolysaccharide-induced-neuroinflammation-and-memory-impairment-in-vitro-and-in-vivo
#20
Nurul Huda Musa, Vasudevan Mani, Siong Meng Lim, Sharmili Vidyadaran, Abu Bakar Abdul Majeed, Kalavathy Ramasamy
Nutritional interventions are now recommended as strategies to delay Alzheimer's disease (AD) progression. The present study evaluated the neuroprotective effect (anti-inflammation) of lactic acid bacteria (either Lactobacillus fermentum LAB9 or L. casei LABPC) fermented cow's milk (CM) against lipopolysaccharide (LPS)-activated microglial BV2 cells in vitro. The ability of CM-LAB in attenuating memory deficit in LPS-induced mice was also investigated. ICR mice were orally administered with CM-LAB for 28 d before induction of neuroinflammation by LPS...
November 2017: Journal of Dairy Research
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