Change of digesta passage rate in dairy cows after different acute stress situations

Six dairy cows received 3 treatments after morning meal, in a double Latin square design. Treatments were ACTH challenge (SYN), hoof trimming (TRIM) and saline (CTR). Measurements included: plasma cortisol and metabolic profile during the 24 h after treatments; the rate of digesta passage, faecal dry matter and pH. Both acute stress situations vs CTR caused a rapid and similar rise in plasma cortisol (P<0.001), while plasma glucose increased only in response to TRIM. Plasma concentrations of urea and BHB were increased for several hours after both stress situations. Most importantly, the transit time of digesta was reduced with SYN and TRIM (P<0.05). Our data demonstrate a reduced forestomach motility during acute stress and confirm a possible negative linkage between stress and gut functions, perhaps independent of diet composition. The mechanism seems linked to increased ACTH or cortisol rather than corticotrophin-releasing factor

evaluation of animal welfare and milk production of goat fed on diet containing hydroponically germinating seeds

Hydroponic fodder is a particularly nutritious feed, rich in protein and vitamins such as ß-carotene, trace elements and enzymes. It may also offer the advantage of a continuous availability. A pilot plant for hydroponically production of germinating seeds was built in an area of the same farm where the trial took place. Three homogeneous groups of 30 Jonica breed goats in lactation (4th-5th parity) were used to evaluate the effects of two different levels of partial dietary substitution with hydroponically germinating (h.g.) oat on plasma levels of cortisol and milk production. Germinated oat was used after 7 days of hydroponic growth. Control group (T) received only feed (fodder and oat integrated with complement feed). The other 2 groups were fed on diet containing different levels (1,5Kg - group A; 3Kg - group B) of hydroponically germinating oat. Goats showed a small interest in fresh feed during the trial period. The integration with hydroponically germinating oat in partial substitution of the traditional feed in the diet of goat did not significantly affect biochemical and haematological parameters

Genetic and environmental influences on in vitro digestibility of alfalfa

To study the relationships between in vitro NDF or true dry matter digestibility (NDFD and IVTDMD) and forage fibre content, 95 alfalfa samples from 5 cultivars grown in 3 different locations and from different cuts were analysed for fibre fractions and evaluated for NDFD and IVTDMD. NDFD was mainly influenced by order of cut and age of the fields. The multifoliate cultivar controlled did not appear to differ for fibre composition and NDFD from the other ones. Fibre fractions contents explained a large part of the difference in NDFD and IVTDMD, and no significant differences in this relationships appeared for first-cut vs. aftermath forage. The best predictive equation of NDFD from fibre factions was: NDFD = 73.61 -0.62 * NDF (% DM) – 56.33 * ADL/NDF (R2=0.39). Variations in fibre content and quality do not completely explain differences in NDFD suggesting the interference of other factors that are worth to be better studied

Improvement of sheep welfare and milk production fed on diet containing hydroponically germinating seeds.

Plasma cortisol and milk production responses of 45 lactating Comisana sheeps (4th- 5th parity), divided into three homogeneous groups of 15 subject each, were used to evaluate the effects of two different levels of partial substitution of a complete feed with hydroponically germinating seeds. Germinated oat was employed after 7 days of hydroponic growth. The three groups received the following diets: Control group (T) received only complete feed. The other 2 groups were fed on diet containing different levels of hydroponically germinating oat (1,5 kg – group A; 3 kg – group B). All the subjects have shown to accept the diets because the per capita ration was always completely consumed. In the second month, the A and B groups showed lower average values of cortisol (P<0.01) and a statistically significant increase in milk production as compared to T (P<0.05 and P<0.001). The obtained data induced to conclude that integration with hydroponically germinating oat in partial substitution of the complete feed does not modify biochemical and hematological parameters and seems to produce an improvement in animal welfare and production of milk

Solvent-free microwave extraction of essential oil from aromatic herbs: From laboratory to pilot and industrial scale

Solvent-free microwave extraction (SFME) has been proposed as a green method for the extraction of essential oil from aromatic herbs that are extensively used in the food industry. This technique is a combination of microwave heating and dry distillation performed at atmospheric pressure without any added solvent or water. The isolation and concentration of volatile compounds is performed in a single stage. In this work, SFME and a conventional technique, hydro-distillation HD (Clevenger apparatus), are used for the extraction of essential oil from rosemary (Rosmarinus officinalis L.) and are compared. This preliminary laboratory study shows that essential oils extracted by SFME in 30 min were quantitatively (yield and kinetics profile) and qualitatively (aromatic profile) similar to those obtained using conventional hydro-distillation in 2 h. Experiments performed in a 75 L pilot microwave reactor prove the feasibility of SFME up scaling and potential industrial applications

Reading a GEM with a VLSI pixel ASIC used as a direct charge collecting anode

In MicroPattern Gas Detectors (MPGD) when the pixel size is below 100 micron and the number of pixels is large (above 1000) it is virtually impossible to use the conventional PCB read-out approach to bring the signal charge from the individual pixel to the external electronics chain. For this reason a custom CMOS array of 2101 active pixels with 80 micron pitch, directly used as the charge collecting anode of a GEM amplifying structure, has been developed and built. Each charge collecting pad, hexagonally shaped, realized using the top metal layer of a deep submicron VLSI technology is individually connected to a full electronics chain (pre-amplifier, shaping-amplifier, sample and hold, multiplexer) which is built immediately below it by using the remaining five active layers. The GEM and the drift electrode window are assembled directly over the chip so the ASIC itself becomes the pixelized anode of a MicroPattern Gas Detector. With this approach, for the first time, gas detectors have reached the level of integration and resolution typical of solid state pixel detectors. Results from the first tests of this new read-out concept are presented. An Astronomical X-Ray Polarimetry application is also discussed.Comment: 11 pages, 14 figures, presented at the Xth Vienna Conference on Instrumentation (Vienna, February 16-21 2004). For a higher resolution paper contact [email protected]

Methyl donor supply to heat stress-challenged polymorphonuclear leukocytes from lactating Holstein cows enhances 1-carbon metabolism, immune response, and cytoprotective gene network abundance

[EN] Mechanisms controlling immune function of dairy cows are dysregulated during heat stress (HS). Methyl donor supply-methionine (Met) and choline (Chop-positively modulates innate immune function, particularly antioxidant systems of polymorphonuclear leukocytes (PMN). The objective of this study was to investigate the effect of Met and Chol supply in vitro on mRNA abundance of genes related to 1-carbon metabolism, inflammation, and immune function in short-term cultures of PMN isolated from mid-lactating Holstein cows in response to heat challenge. Blood PMN were isolated from 5 Holstein cows (153 +/- 5 d postpartum, 34.63 +/- 2.73 kg/d of milk production; mean +/- SD). The PMN were incubated for 2 h at thermal-neutral (37 degrees C; TN) or heat stress (42 degrees C; HS) temperatures with 3 levels of Chol (0, 400, or 800 mu g/mL) or 3 ratios of Lys:Met (Met; 3.6:1, 2.9:1, or 2.4:1). Supernatant concentrations of IL-1 beta, IL-6, and tumor necrosis factor-alpha were measured via bovine-specific ELISA. Fold-changes in mRNA abundance were calculated separately for Chol and Met treatments to obtain the fold-change response at 42 degrees C (HS) relative to 37 degrees C (TN). Data were subjected to ANOVA using PROC MIXED in SAS (SAS Institute Inc., Cary, NC). Orthogonal contrasts were used to determine the linear or quadratic effect of Met and Chol for mRNA fold-change and supernatant cytokine concentrations. Compared with PMN receiving 0 mu g of Chol/mL, heat-stressed PMN supplemented with Chol at 400 or 800 mu g/mL had greater fold-change in abundance of CBS, CSAD, GSS, GSR, and GPX1. Among genes associated with inflammation and immune function, fold-change in abundance of TLR2, TLR4, IRAK1, IL1B, and IL10 increased with 400 and 800 mu g of Chol/mL compared with PMN receiving 0 mu g of Chol/mL. Fold-change in abundance of SAHH decreased linearly at increasing levels of Met supply. A linear effect was detected for MPO, NFKB1, and SOD1 due to greater fold-change in abundance when Met was increased to reach Lys: Met ratios of 2.9:1 and 2.4:1. Although increasing Chol supply upregulated BAX, BCL2, and HSP70, increased Met supply only upregulated BAX. Under HS conditions, enhancing PMN supply of Chol to 400 mu g/mL effectively increased fold-change in abundance of genes involved in antioxidant production (conferring cellular processes protection from free radicals and reactive oxygen species), inflammatory signaling, and innate immunity. Although similar outcomes were obtained with Met supply at Lys:Met ratios of 2.9:1 and 2.4:1, the response was less pronounced. Both Chol and Met supply enhanced the cytoprotective characteristics of PMN through upregulation of heat shock proteins. Overall, the modulatory effects detected in the present experiment highlight an opportunity to use Met and particularly Chol supplementation during thermal stress.M. Vailati-Riboni was supported in part by Hatch funds under project ILLU-538-914, National Institute of Food and Agriculture (Washington, DC). The authors declare no conflict of interest.Lopreiato, V.; Vailati-Riboni, M.; Parys, C.; Fernández Martínez, CJ.; Minuti, A.; Loor, J. (2020). Methyl donor supply to heat stress-challenged polymorphonuclear leukocytes from lactating Holstein cows enhances 1-carbon metabolism, immune response, and cytoprotective gene network abundance. Journal of Dairy Science. 103(11):10477-10493. https://doi.org/10.3168/jds.2020-18638S104771049310311Abdelmegeid, M. K., Vailati-Riboni, M., Alharthi, A., Batistel, F., & Loor, J. J. (2017). Supplemental methionine, choline, or taurine alter in vitro gene network expression of polymorphonuclear leukocytes from neonatal Holstein calves. Journal of Dairy Science, 100(4), 3155-3165. doi:10.3168/jds.2016-12025Armentano, L. E., Bertics, S. J., & Ducharme, G. A. (1997). Response of Lactating Cows to Methionine or Methionine Plus Lysine Added to High Protein Diets Based on Alfalfa and Heated Soybeans. Journal of Dairy Science, 80(6), 1194-1199. doi:10.3168/jds.s0022-0302(97)76047-8Banerjee, R., Evande, R., Kabil, Ö., Ojha, S., & Taoka, S. (2003). Reaction mechanism and regulation of cystathionine β-synthase. Biochimica et Biophysica Acta (BBA) - Proteins and Proteomics, 1647(1-2), 30-35. doi:10.1016/s1570-9639(03)00044-xBatistel, F., Arroyo, J. M., Bellingeri, A., Wang, L., Saremi, B., Parys, C., … Loor, J. J. (2017). Ethyl-cellulose rumen-protected methionine enhances performance during the periparturient period and early lactation in Holstein dairy cows. Journal of Dairy Science, 100(9), 7455-7467. doi:10.3168/jds.2017-12689Baumgard, L. H., & Rhoads, R. P. (2013). Effects of Heat Stress on Postabsorptive Metabolism and Energetics. Annual Review of Animal Biosciences, 1(1), 311-337. doi:10.1146/annurev-animal-031412-103644Bernabucci, U., Biffani, S., Buggiotti, L., Vitali, A., Lacetera, N., & Nardone, A. (2014). The effects of heat stress in Italian Holstein dairy cattle. Journal of Dairy Science, 97(1), 471-486. doi:10.3168/jds.2013-6611Bernabucci, U., Lacetera, N., Baumgard, L. H., Rhoads, R. P., Ronchi, B., & Nardone, A. (2010). Metabolic and hormonal acclimation to heat stress in domesticated ruminants. Animal, 4(7), 1167-1183. doi:10.1017/s175173111000090xBoldyrev, A., Bryushkova, E., Mashkina, A., & Vladychenskaya, E. (2013). Why Is Homocysteine Toxic for the Nervous and Immune Systems? Current Aging Science, 6(1), 29-36. doi:10.2174/18746098112059990007Catozzi, C., Ávila, G., Zamarian, V., Pravettoni, D., Sala, G., Ceciliani, F., … Lecchi, C. (2020). In-vitro effect of heat stress on bovine monocytes lifespan and polarization. Immunobiology, 225(2), 151888. doi:10.1016/j.imbio.2019.11.023Chinenov, Y., Gupte, R., & Rogatsky, I. (2013). Nuclear receptors in inflammation control: Repression by GR and beyond. Molecular and Cellular Endocrinology, 380(1-2), 55-64. doi:10.1016/j.mce.2013.04.006Chorąży, M., Kontny, E., Marcinkiewicz, J., & Maśliński, W. (2002). Amino Acids, 23(4), 407-413. doi:10.1007/s00726-002-0204-0Coleman, D. N., Lopreiato, V., Alharthi, A., & Loor, J. J. (2020). Amino acids and the regulation of oxidative stress and immune function in dairy cattle. Journal of Animal Science, 98(Supplement_1), S175-S193. doi:10.1093/jas/skaa138Collier, R. J., Stiening, C. M., Pollard, B. C., VanBaale, M. J., Baumgard, L. H., Gentry, P. C., & Coussens, P. M. (2006). Use of gene expression microarrays for evaluating environmental stress tolerance at the cellular level in cattle1. Journal of Animal Science, 84(suppl_13), E1-E13. doi:10.2527/2006.8413_supple1xCouper, K. N., Blount, D. G., & Riley, E. M. (2008). IL-10: The Master Regulator of Immunity to Infection. The Journal of Immunology, 180(9), 5771-5777. doi:10.4049/jimmunol.180.9.5771Del Vesco, A. P., Gasparino, E., Grieser, D. de O., Zancanela, V., Soares, M. A. M., & de Oliveira Neto, A. R. (2015). Effects of methionine supplementation on the expression of oxidative stress-related genes in acute heat stress-exposed broilers. British Journal of Nutrition, 113(4), 549-559. doi:10.1017/s0007114514003535Ekremoğlu, M., Türközkan, N., Erdamar, H., Kurt, Y., & Yaman, H. (2006). Protective effect of taurine on respiratory burst activity of polymorphonuclear leukocytes in endotoxemia. Amino Acids, 32(3), 413-417. doi:10.1007/s00726-006-0382-2El-Benna, J., Hurtado-Nedelec, M., Marzaioli, V., Marie, J.-C., Gougerot-Pocidalo, M.-A., & Dang, P. M.-C. (2016). Priming of the neutrophil respiratory burst: role in host defense and inflammation. Immunological Reviews, 273(1), 180-193. doi:10.1111/imr.12447Esposito, G., Irons, P. C., Webb, E. C., & Chapwanya, A. (2014). Interactions between negative energy balance, metabolic diseases, uterine health and immune response in transition dairy cows. Animal Reproduction Science, 144(3-4), 60-71. doi:10.1016/j.anireprosci.2013.11.007Fear, J. M., & Hansen, P. J. (2011). Developmental Changes in Expression of Genes Involved in Regulation of Apoptosis in the Bovine Preimplantation Embryo1. Biology of Reproduction, 84(1), 43-51. doi:10.1095/biolreprod.110.086249Gao, S. T., Guo, J., Quan, S. Y., Nan, X. M., Fernandez, M. V. S., Baumgard, L. H., & Bu, D. P. (2017). The effects of heat stress on protein metabolism in lactating Holstein cows. Journal of Dairy Science, 100(6), 5040-5049. doi:10.3168/jds.2016-11913Han, Z.-Y., Mu, T., & Yang, Z. (2014). Methionine protects against hyperthermia-induced cell injury in cultured bovine mammary epithelial cells. Cell Stress and Chaperones, 20(1), 109-120. doi:10.1007/s12192-014-0530-7Heiser, A., LeBlanc, S. J., & McDougall, S. (2018). Pegbovigrastim treatment affects gene expression in neutrophils of pasture-fed, periparturient cows. Journal of Dairy Science, 101(9), 8194-8207. doi:10.3168/jds.2017-14129Horowitz, M. (2001). Heat acclimation: phenotypic plasticity and cues to the underlying molecular mechanisms. Journal of Thermal Biology, 26(4-5), 357-363. doi:10.1016/s0306-4565(01)00044-4Hunter-Lavin, C., Davies, E. L., Bacelar, M. M. F. V. G., Marshall, M. J., Andrew, S. M., & Williams, J. H. H. (2004). Hsp70 release from peripheral blood mononuclear cells. Biochemical and Biophysical Research Communications, 324(2), 511-517. doi:10.1016/j.bbrc.2004.09.075Ingvartsen, K. L., & Moyes, K. (2013). Nutrition, immune function and health of dairy cattle. Animal, 7, 112-122. doi:10.1017/s175173111200170xJoshi, B. C., Joshi, H. B., McDowell, R. E., & Sadhu, D. P. (1968). Composition of Skin Secretions from Three Indian Breeds of Cattle Under Thermal Stress. Journal of Dairy Science, 51(6), 917-920. doi:10.3168/jds.s0022-0302(68)87105-xKobayashi, S. D., & DeLeo, F. R. (2009). Role of neutrophils in innate immunity: a systems biology‐level approach. Wiley Interdisciplinary Reviews: Systems Biology and Medicine, 1(3), 309-333. doi:10.1002/wsbm.32Kumar, H., Kawai, T., & Akira, S. (2011). Pathogen Recognition by the Innate Immune System. International Reviews of Immunology, 30(1), 16-34. doi:10.3109/08830185.2010.529976Lacetera, N., Bernabucci, U., Basiricò, L., Morera, P., & Nardone, A. (2009). Heat shock impairs DNA synthesis and down-regulates gene expression for leptin and Ob-Rb receptor in concanavalin A-stimulated bovine peripheral blood mononuclear cells. Veterinary Immunology and Immunopathology, 127(1-2), 190-194. doi:10.1016/j.vetimm.2008.09.020Lacetera, N., Bernabucci, U., Scalia, D., Basiricò, L., Morera, P., & Nardone, A. (2006). Heat Stress Elicits Different Responses in Peripheral Blood Mononuclear Cells from Brown Swiss and Holstein Cows. Journal of Dairy Science, 89(12), 4606-4612. doi:10.3168/jds.s0022-0302(06)72510-3Lecchi, C., Rota, N., Vitali, A., Ceciliani, F., & Lacetera, N. (2016). In vitro assessment of the effects of temperature on phagocytosis, reactive oxygen species production and apoptosis in bovine polymorphonuclear cells. Veterinary Immunology and Immunopathology, 182, 89-94. doi:10.1016/j.vetimm.2016.10.007Loos, H., Roos, D., Weening, R., & Houwerzijl, J. (1976). Familial deficiency of glutathione reductase in human blood cells. Blood, 48(1), 53-62. doi:10.1182/blood.v48.1.53.53Lopreiato, V., Vailati-Riboni, M., Bellingeri, A., Khan, I., Farina, G., Parys, C., & Loor, J. J. (2019). Inflammation and oxidative stress transcription profiles due to in vitro supply of methionine with or without choline in unstimulated blood polymorphonuclear leukocytes from lactating Holstein cows. Journal of Dairy Science, 102(11), 10395-10410. doi:10.3168/jds.2019-16413Lubos, E., Loscalzo, J., & Handy, D. E. (2011). Glutathione Peroxidase-1 in Health and Disease: From Molecular Mechanisms to Therapeutic Opportunities. Antioxidants & Redox Signaling, 15(7), 1957-1997. doi:10.1089/ars.2010.3586Lushchak, V. I. (2012). Glutathione Homeostasis and Functions: Potential Targets for Medical Interventions. Journal of Amino Acids, 2012, 1-26. doi:10.1155/2012/736837McGuire, M. A., Beede, D. K., DeLorenzo, M. A., Wilcox, C. J., Huntington, G. B., Reynolds, C. K., & Collier, R. J. (1989). Effects of Thermal Stress and Level of Feed Intake on Portal Plasma Flow and Net Fluxes of Metabolites in Lactating Holstein Cows2,3. Journal of Animal Science, 67(4), 1050-1060. doi:10.2527/jas1989.6741050xMin, L., Zheng, N., Zhao, S., Cheng, J., Yang, Y., Zhang, Y., … Wang, J. (2016). Long-term heat stress induces the inflammatory response in dairy cows revealed by plasma proteome analysis. Biochemical and Biophysical Research Communications, 471(2), 296-302. doi:10.1016/j.bbrc.2016.01.185Moyes, K. M., Drackley, J. K., Morin, D. E., & Loor, J. J. (2010). Greater expression of TLR2, TLR4, and IL6 due to negative energy balance is associated with lower expression of HLA-DRA and HLA-A in bovine blood neutrophils after intramammary mastitis challenge with Streptococcus uberis. Functional & Integrative Genomics, 10(1), 53-61. doi:10.1007/s10142-009-0154-7Moyes, K. M., Graugnard, D. E., Khan, M. J., Mukesh, M., & Loor, J. J. (2014). Postpartal immunometabolic gene network expression and function in blood neutrophils are altered in response to prepartal energy intake and postpartal intramammary inflammatory challenge. Journal of Dairy Science, 97(4), 2165-2177. doi:10.3168/jds.2013-7433Nakamura, M. (2000). Preconditioning decreases Bax expression, PMN accumulation and apoptosis in reperfused rat heart. Cardiovascular Research, 45(3), 661-670. doi:10.1016/s0008-6363(99)00393-4Oeckinghaus, A., & Ghosh, S. (2009). The NF- B Family of Transcription Factors and Its Regulation. Cold Spring Harbor Perspectives in Biology, 1(4), a000034-a000034. doi:10.1101/cshperspect.a000034Osorio, J. S., Ji, P., Drackley, J. K., Luchini, D., & Loor, J. J. (2014). Smartamine M and MetaSmart supplementation during the peripartal period alter hepatic expression of gene networks in 1-carbon metabolism, inflammation, oxidative stress, and the growth hormone–insulin-like growth factor 1 axis pathways. Journal of Dairy Science, 97(12), 7451-7464. doi:10.3168/jds.2014-8680Salama, A. A. K., Duque, M., Wang, L., Shahzad, K., Olivera, M., & Loor, J. J. (2019). Enhanced supply of methionine or arginine alters mechanistic target of rapamycin signaling proteins, messenger RNA, and microRNA abundance in heat-stressed bovine mammary epithelial cells in vitro. Journal of Dairy Science, 102(3), 2469-2480. doi:10.3168/jds.2018-15219Schell, M. T., Spitzer, A. L., Johnson, J. A., Lee, D., & Harris, H. W. (2005). Heat Shock Inhibits NF-kB Activation in a Dose- and Time-Dependent Manner. Journal of Surgical Research, 129(1), 90-93. doi:10.1016/j.jss.2005.05.025Silanikove, N. (2000). Effects of heat stress on the welfare of extensively managed domestic ruminants. Livestock Production Science, 67(1-2), 1-18. doi:10.1016/s0301-6226(00)00162-7Stankiewicz, A. R., Lachapelle, G., Foo, C. P. Z., Radicioni, S. M., & Mosser, D. D. (2005). Hsp70 Inhibits Heat-induced Apoptosis Upstream of Mitochondria by Preventing Bax Translocation. Journal of Biological Chemistry, 280(46), 38729-38739. doi:10.1074/jbc.m509497200Steel, G. J., Fullerton, D. M., Tyson, J. R., & Stirling, C. J. (2004). Coordinated Activation of Hsp70 Chaperones. Science, 303(5654), 98-101. doi:10.1126/science.1092287Sun, D., Chen, D., Du, B., & Pan, J. (2005). Heat Shock Response Inhibits NF-κB Activation and Cytokine Production in Murine Kupffer Cells. Journal of Surgical Research, 129(1), 114-121. doi:10.1016/j.jss.2005.05.028Taraktsoglou, M., Szalabska, U., Magee, D. A., Browne, J. A., Sweeney, T., Gormley, E., & MacHugh, D. E. (2011). Transcriptional profiling of immune genes in bovine monocyte-derived macrophages exposed to bacterial antigens. Veterinary Immunology and Immunopathology, 140(1-2), 130-139. doi:10.1016/j.vetimm.2010.12.002Trevisi, E., Jahan, N., Bertoni, G., Ferrari, A., & Minuti, A. (2015). Pro-Inflammatory Cytokine Profile in Dairy Cows: Consequences for New Lactation. Italian Journal of Animal Science, 14(3), 3862. doi:10.4081/ijas.2015.3862Tsan, M.-F., & Gao, B. (2004). Cytokine function of heat shock proteins. American Journal of Physiology-Cell Physiology, 286(4), C739-C744. doi:10.1152/ajpcell.00364.2003Vailati-Riboni, M., Zhou, Z., Jacometo, C. B., Minuti, A., Trevisi, E., Luchini, D. N., & Loor, J. J. (2017). Supplementation with rumen-protected methionine or choline during the transition period influences whole-blood immune response in periparturient dairy cows. Journal of Dairy Science, 100(5), 3958-3968. doi:10.3168/jds.2016-11812Yan, J., Meng, X., Wancket, L. M., Lintner, K., Nelin, L. D., Chen, B., … Liu, Y. (2012). Glutathione Reductase Facilitates Host Defense by Sustaining Phagocytic Oxidative Burst and Promoting the Development of Neutrophil Extracellular Traps. The Journal of Immunology, 188(5), 2316-2327. doi:10.4049/jimmunol.1102683Zhou, Z., Bulgari, O., Vailati-Riboni, M., Trevisi, E., Ballou, M. A., Cardoso, F. C., … Loor, J. J. (2016). Rumen-protected methionine compared with rumen-protected choline improves immunometabolic status in dairy cows during the peripartal period. Journal of Dairy Science, 99(11), 8956-8969. doi:10.3168/jds.2016-10986Zhou, Z., Ferdous, F., Montagner, P., Luchini, D. N., Corrêa, M. N., & Loor, J. J. (2018). Methionine and choline supply during the peripartal period alter polymorphonuclear leukocyte immune response and immunometabolic gene expression in Holstein cows. Journal of Dairy Science, 101(11), 10374-10382. doi:10.3168/jds.2018-14972Zhou, Z., Vailati-Riboni, M., Trevisi, E., Drackley, J. K., Luchini, D. N., & Loor, J. J. (2016). Better postpartal performance in dairy cows supplemented with rumen-protected methionine compared with choline during the peripartal period. Journal of Dairy Science, 99(11), 8716-8732. doi:10.3168/jds.2015-1052

Energy characterization of Pixirad-1 photon counting detector system

This work is focused on the characterization of the Pixirad-1 detector system from the spectroscopic point of view. An energy calibration has been carried out using different X-ray sources such as fluorescence lines, synchrotron radiation and radioactive elements. The energy resolution has been measured as function of the energy and the results have been compared with theoretical estimation. Last, the charge sharing fraction has been evaluated by exploiting the monochromatic energy of the Elettra synchrotron beam