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1. A Bayesian approach to analyze energy balance data from lactating dairy cows

Author:
Lopez, S.,   et al.   ; Strathe, A.B.; Dijkstra, J.; France, J.; Yan, T.; Kebreab, E.;     Show all 6 Authors
Source:
Journal of dairy science 2011 v.94 no.5 pp. 2520-2531
ISSN:
0022-0302
Subject:
dairy cows; energy balance; energy metabolism; fasting; forage evaluation; genetic improvement; lactation; metabolizable energy; milk; milk production; models
Abstract:
... The objective of the present investigation was to develop a Bayesian framework for updating and integrating covariate information into key parameters of metabolizable energy (ME) systems for dairy cows. The study addressed specifically the effects of genetic improvements and feed quality on key parameters in current ME systems. These are net and metabolizable energy for maintenance (NEM and MEM, r ...
DOI:
10.3168/jds.2010-3836
PubMed:
21524544

2. A comparative evaluation of functions for partitioning nitrogen and amino acid intake between maintenance and growth in broilers

Author:
Lopez, S.,   et al.   ; Kebreab, E.; France, J.; Kuhi, H.D.;     Show all 4 Authors
Source:
Journal of agricultural science 2008 v.146 no.2 pp. 163-170
ISSN:
0021-8596
Subject:
broiler chickens; broiler feeding; feed intake; protein intake; amino acids; amino acid metabolism; nitrogen metabolism; animal growth; crude protein
Abstract:
... The results from three types of study with broilers, namely nitrogen (N) balance, bioassays and growth experiments, provided the data used herein. Sets of data on N balance and protein accretion (bioassay studies) were used to assess the ability of the monomolecular equation to describe the relationship between (i) N balance and amino acid (AA) intake and (ii) protein accretion and AA intake. The ...
DOI:
10.1017/S0021859607007423

3. A comparison of the Schumacher with other functions for describing growth in pigs

Author:
Lopez, S.,   et al.   ; Schulin-Zeuthen, M.; Kebreab, E.; Dijkstra, J.; Bannink, A.; Darmani Kuhi, H.; Thornley, J.H.M.; France, J.;     Show all 8 Authors
Source:
Animal feed science and technology 2008 v.143 no.1-4 pp. 314-327
ISSN:
0377-8401
Subject:
mathematical models; swine; animal growth; prediction; body weight; equations
Abstract:
... This study was undertaken to introduce the Schumacher equation and compare it with established functions for describing growth in pigs. The relationship between live weight (LW) and cumulative feed intake was also investigated. A database was constructed from three independent trials in which LW, age and intake were measured from birth to 937 days. Three growth functions were used for analysis of ...
DOI:
10.1016/j.anifeedsci.2007.05.017

4. Adenovirus Infection in Spanish Ibex

Author:
López, S.,   et al.   ; Hervás, J.; de Lara, Chacón M. F.; Arias, J.; Carrasco, L.; Gómez-Villamandos, J. C.;     Show all 6 Authors
ISSN:
1040-6387
Subject:
histopathology; strain differences; disease transmission; necropsy; lungs; genetic variation; case studies; Adenoviridae; mortality; infection; disease diagnosis
DOI:
10.1177/104063879801000120
PubMed:
9526871

5. Almost never you get what you pay for: Widespread mislabeling of commercial “zamburiñas” in northern Spain

Author:
López, S.,   et al.   ; Parrondo, M.; Aparicio-Valencia, A.; Fueyo, A.; Quintanilla-García, P.; Arias, A.; Borrell, Y.J.;     Show all 7 Authors
Source:
Food control 2021 v.120 pp. 107541
ISSN:
0956-7135
Subject:
Argopecten purpuratus; canned foods; common names; food fraud; food safety; marine resources; mitochondria; resource management; restaurants; sampling; scallops; supermarkets; Spain
Abstract:
... Food fraud involves both financial and health problems for consumers as well as conservation problems for target species worldwide. In Spain, the common name “zamburiña”, which officially only refers to the species Mimachlamys varia (the variegated scallop), is frequently mistakenly used to refer to other pectinid species, and this confuses consumers. In this study, we carried out the first assess ...
DOI:
10.1016/j.foodcont.2020.107541

6. An evaluation of different growth functions for describing the profile of live weight with time (age) in meat and egg strains of chicken

Author:
Lopez, S.,   et al.   ; Kuhi, H. Darmani; Kebreab, E.; France, J.;     Show all 4 Authors
Source:
Poultry science 2003 v.82 no.10 pp. 1536-1543
ISSN:
0032-5791
Subject:
animal age; body weight; chicken eggs; chicken meat; chickens; data collection; eggs; equations; females; males; models; France
Abstract:
... A total of 86 profiles from meat and egg strains of chickens (male and female) were used in this study. Different flexible growth functions were evaluated with regard to their ability to describe the relationship between live weight and age and were compared with the Gompertz and logistic equations, which have a fixed point of inflection. Six growth functions were used: Gompertz, logistic, Lopez, ...
DOI:
10.1093/ps/82.10.1536

7. An extended model of phosphorus metabolism in growing ruminants

Author:
López, S.,   et al.   ; Dias, R. S.; Patiño, R. M. P.; Silva, T. S.; Silva Filho, J. C.; Vitti, D. M. S. S.; Peçanha, M. R. S. R.; Kebreab, E.; France, J.;     Show all 9 Authors
Source:
Journal of animal science 2011 v.89 no.12 pp. 4151-4162
ISSN:
0021-8812
Subject:
blood; bone formation; boning; dicalcium phosphate; excretion; feces; feed intake; heart; jugular vein; kidneys; liver; metabolism; models; phosphorus; rumen; saliva; sheep
Abstract:
... A major objective of this study was to extend the Vitti-Dias model used to describe P metabolism in ruminants, by adding 2 new pools to the original model to represent the rumen and saliva. An experiment was carried out using 24 male sheep, initial BW of 34.5 kg, aged 8 mo, fed a basal diet supplied with increasing amounts of dicalcium phosphate to provide 0.14, 0.32, 0.49, and 0.65% P in the diet ...
DOI:
10.2527/jas.2010-3669
PubMed:
21764835

8. An invaded invader: high prevalence of entocytherid ostracods on the red swamp crayfish Procambarus clarkii (Girard, 1852) in the Eastern Iberian Peninsula

Author:
López, S.,   et al.   ; Aguilar-Alberola, J. A.; Mesquita-Joanes, F.; Mestre, A.; Casanova, J. C.; Rueda, J.; Ribas, A.;     Show all 7 Authors
Source:
Hydrobiologia 2012 v.688 no.1 pp. 63-73
ISSN:
0018-8158
Subject:
introduced species; population distribution; instars; surveys; sex determination analysis; Procambarus clarkii; molting; indigenous species; environmental impact; crayfish; population structure; habitats; population dynamics; Spain
Abstract:
... The American red swamp crayfish Procambarus clarkii (Girard, 1852) was introduced in 1973 into the Iberian Peninsula for commercial purposes. As a result of both the expansion from the Iberian Peninsula and, probably, further introductions in other European countries, now it is widely distributed throughout much of Europe. The ecological impacts of this invading crayfish have received increasing a ...
DOI:
10.1007/s10750-011-0660-1

9. Anti-human immunodeficiency virus type 1 (HIV-1) activity of lectins from Narcissus species

Author:
Lopez, S.,   et al.   ; Armand-Ugon, M.; Bastida, J.; Viladomat, F.; Este, J.A.; Stewart, D.; Codina, C.;     Show all 7 Authors
Source:
Planta medica 2003 v.69 no.2 pp. 109-112
ISSN:
0032-0943
Subject:
cytotoxins; hemagglutination; wild plants; antiviral agents; Human immunodeficiency virus 1; humans; Narcissus pseudonarcissus; lectins; cytotoxicity; medicinal plants; plant extracts; erythrocytes; bulbs; chemical constituents of plants; Spain
DOI:
10.1055/s-2003-37715
PubMed:
12624813

10. Application of a kinetic model to describe phosphorus metabolism in pigs fed a diet with a microbial phytase

Author:
Lopez, S.,   et al.   ; Dias, R.S.; Moreira, J.A.; Schulin-Zeuthen, M.; Vitti, D.M.S.S.; Kebreab, E.; France, J.;     Show all 7 Authors
Source:
Journal of agricultural science 2010 v.148 no.3 pp. 277-286
ISSN:
0021-8596
Subject:
nutrient resorption (physiology); swine feeding; isotope labeling; intestinal mucosa; bone mineralization; heart; phosphorus; stable isotopes; feed rations; blood chemistry; skeletal muscle; feces; temporal variation; simulation models; phytases; feed additives; nutrient retention; kidneys; swine; liver; mineral metabolism; food animals; dietary minerals
Abstract:
... The objective of the current study was to apply the Vitti–Dias model to investigate phosphorus (P) metabolism in growing pigs fed a diet supplemented with microbial phytase. The basal diet contained maize, defatted rice bran, vegetable oil, soybean meal, limestone, salt and a vitamin and mineral mix. There was no inorganic P in the diet and phytase was added at levels of 253, 759, 1265 and 1748 ph ...
DOI:
10.1017/S0021859610000195

11. Application of the law of diminishing returns to estimate maintenance requirement for amino acids and their efficiency of utilization for accretion in young chicks

Author:
Lopez, S.,   et al.   ; Darmani Kuhi, H.; Kebreab, E.; France, J.;     Show all 4 Authors
Source:
Journal of agricultural science 2009 v.147 no.4 pp. 383-390
ISSN:
0021-8596
Subject:
nutrient intake; broiler chickens; mathematical models; lysine; threonine; valine; nutrient use efficiency; body weight; equations; nutrient retention; essential amino acids; liveweight gain; protein deposition; nutrient requirements; energy balance; chicks; broiler feeding
Abstract:
... Suitability of the monomolecular equation, specifically re-parameterized for analysing energy balance data, has recently been investigated in broilers and turkeys. In the current study, this equation was applied to literature data from growing chicks fed crystalline amino acid (AA) diets, in order to provide estimates for AA requirements for maintenance, body-weight gain and protein accretion. Non ...
DOI:
10.1017/S0021859609008442

12. Aquatic plants and macroalgae as potential feed ingredients in ruminant diets

Author:
López, S.,   et al.   ; Rjiba-Ktita, S.; Chermiti, A.; Bodas, R.; France, J.;     Show all 5 Authors
Source:
Journal of applied phycology 2017 v.29 no.1 pp. 449-458
ISSN:
0921-8971
Subject:
Barbarine; Chaetomorpha; Ruppia maritima; Ulva lactuca; bags; barley; biomass; cannulas; diet; digestibility; fermentation; grasses; hosts; ingredients; macroalgae; nutritive value; nylon; rams; rumen fluids; seagrasses; Tunisia
Abstract:
... The aim of this research was to investigate the nutritive value of three aquatic plants, the seagrass (Ruppia maritima) and two green macroalgae (Chaetomorpha linum and Ulva lactuca). Biomass from three aquatic plants collected from the lagoon Ghar el melh of Bizerte (northeast of Tunisia) was washed and dried, and tested alone (compared to barley grain and barley grass) or included at different l ...
DOI:
10.1007/s10811-016-0936-y

13. A review of mathematical functions for the analysis of growth in poultry

Author:
Lopez, S.,   et al.   ; Kuhi, H. Darmani; Porter, T.; Kebreab, E.; Strathe, A.B.; Dumas, A.; Dijkstra, J.; France, J.;     Show all 8 Authors
Source:
World's poultry science journal 2010 v.66 no.2 pp. 227-240
ISSN:
0043-9339
Subject:
broiler chickens; estimation; animal growth; body weight; poultry breeds; probability analysis; nutrient requirements; Richards' equation; econometric models; farm profitability; feed intake; probabilistic models; prediction
DOI:
10.1017/S0043933910000280

14. Assessment of nutritive value of cereal and legume straws based on chemical composition and in vitro digestibility

Author:
Lopez, S.,   et al.   ; Davies, D.R.; Giraldez, F.J.; Dhanoa, M.S.; Dijkstra, J.; France, J.;     Show all 6 Authors
Source:
Journal of the science of food and agriculture 2005 v.85 no.9 pp. 1550-1557
ISSN:
0022-5142
Subject:
in vitro digestibility; sheep; wheat straw; nutritive value; corn stover; legumes; rumen fermentation; rumen fluids; rye straw; oat straw
Abstract:
... The nutritive value of 17 straws was determined on the basis of their chemical composition, in vitro dry matter (DM) digestibility and rumen fermentation kinetics (from gas production curves measured in vitro). Five roughages were from the cereal species Avena sativa (oat), Hordeum vulgare (barley), Secale cereale (rye), Triticum aestivum (wheat) and Zea mays (maize stover). The other 12 samples w ...
DOI:
10.1002/jsfa.2136

15. A strategy for modelling heavy-tailed greenhouse gases (GHG) data using the generalised extreme value distribution: Are we overestimating GHG flux using the sample mean?

Author:
López, S.,   et al.   ; Dhanoa, M.S.; Louro, A.; Cardenas, L.M.; Shepherd, A.; Sanderson, R.; France, J.;     Show all 7 Authors
Source:
Atmospheric environment 2020 v.237 pp. 117500
ISSN:
1352-2310
Subject:
agricultural land; atmospheric chemistry; carbon dioxide; greenhouse gas emissions; greenhouse gases; inventories; lognormal distribution; nitrous oxide
Abstract:
... In this study, we draw up a strategy for analysis of greenhouse gas (GHG) field data. The distribution of GHG flux data generally exhibits excessive skewness and kurtosis. This results in a heavy tailed distribution that is much longer than the tail of a log-normal distribution or outlier induced skewness. The generalised extreme value (GEV) distribution is well-suited to model such data. We evalu ...
DOI:
10.1016/j.atmosenv.2020.117500

16. Biodiversity of mannose-specific lectins within Narcissus species

Author:
Lopez, S.,   et al.   ; Codina, C.; Bastida, J.; Viladomat, F.; Davidson, E.; Stewart, D.;     Show all 6 Authors
Source:
Journal of agricultural and food chemistry 2002 v.50 no.9 pp. 2507-2513
ISSN:
0021-8561
Subject:
interspecific variation; hemagglutination; Narcissus pseudonarcissus; bulbs; molecular weight; isoelectric focusing
Abstract:
... Mannose-specific lectins (MSLs) were isolated from the bulbs of 27 species of wild Spanish Narcissi and compared to the commercially available MSL from daffodil (Narcissus pseudonarcissus, NPA). Molecular weight analysis showed the monomers of all the MSLs were at, or around, 12.5 kD. Haemagglutination assays showed that the MSLs exhibited activities at up to four times greater than that displayed ...
DOI:
10.1021/jf011459v
PubMed:
11958613

17. Building a unified Spanish food database according to EuroFIR specifications

Author:
Ramos López, S.,   et al.   ; Martínez Burgos, M.A.; Martínez-Victoria, I.; Milá, R.; Farrán, A.; Farré, R.; Ros, G.; Yago, M.D.; Audi, N.; Santana, C.; López Millán, M.B.; Mañas, M.; Martínez-Victoria, E.;     Show all 13 Authors
Source:
Food chemistry 2009 v.113 no.3 pp. 784-788
ISSN:
0308-8146
Subject:
epidemiological studies; consumer protection; nutrient content; foods; classification; nutrition education; data collection; nutritive value; nutrient databanks; nutrition information; food law; food composition; qualitative analysis; quality control; Spain
Abstract:
... The existence of reliable data on the composition of foods is critical for a variety of purposes. There is a growing requirement for food composition data to be compatible at international level through computerised databases and nutritional analysis software. The work on data harmonisation and its application in European food composition databases (FCDBs) is being undertaken by the European food ...
DOI:
10.1016/j.foodchem.2008.10.024

18. Characterization of the power and efficiency of Stirling engine subsystems

Author:
López, S.,   et al.   ; García, D.; González, M.A.; Prieto, J.I.; Herrero, S.; Mesonero, I.; Villasante, C.;     Show all 7 Authors
Source:
Applied energy 2014 v.121 pp. 51-63
ISSN:
0306-2619
Subject:
equipment; models; physical phenomena; prototypes; thermodynamics
Abstract:
... The development of systems based on Stirling machines is limited by the lack of data about the performance of the various subsystems that are located between the input and output power sections. The measurement of some of the variables used to characterise these internal subsystems presents difficulties, particularly in the working gas circuit and the drive mechanism, which causes experimental rep ...
DOI:
10.1016/j.apenergy.2014.01.067

19. Chemical composition and in vitro digestibility of some Spanish browse plant species

Author:
Lopez, S.,   et al.   ; Ammar, H.; Gonzalez, J.S.; Ranilla, M.J.;     Show all 4 Authors
Source:
Journal of the science of food and agriculture 2004 v.84 no.2 pp. 197-204
ISSN:
0022-5142
Subject:
rumen fluids; Quercus pyrenaica; Cistus laurifolius; shrubs; in vitro digestibility; gas production (biological); Erica; flowers; crude protein; chemical constituents of plants; Rosa canina; leaves; Spain
Abstract:
... Samples of leaves, flowers and fruits of four browse species were collected from uplands in the province of Leon (northwestern Spain) at different sampling times (from spring till autumn). The browse species were Erica australis (Spanish heath), Cistus laurifolius (laurel-leaved rock rose), Quercus pyrenaica (hoary oak) and Rosa canina (wild dog rose). A large variability in chemical composition a ...
DOI:
10.1002/jsfa.1635

20. Chemical thinning and summer PGRS for consistent return cropping of 'Honeycrisp' apples

Author:
Lopez, S.,   et al.   ; Robinson, T.; Iungerman, K.;     Show all 3 Authors
Source:
Acta horticulturae 2010 no.884 pp. 635-642
ISSN:
0567-7572
Subject:
apples; carbaryl; ethephon; naphthaleneacetic acid; summer; trees
Abstract:
... A field study was conducted at Geneva, NY from 2005-2007 with ‘Honeycrisp’/M.9 apple trees where a range of croploads was imposed on 3rd-5th year trees by hand thinning at 10 mm fruit size to determine the effect of crop load on return bloom. A relatively low crop load (4 fruits/cm2 trunk cross-sectional area (TCA) was required to ensure a strong return bloom the next year with young trees but wit ...