992 research outputs found
Tendency in the growth of creole kids in extensive systems
The present investigation was developed at the State of Puebla, Mexico, to describe the tendency in the growth of Creole kids by means of the evaluation of the average daily weight gain (ADWG). A total of 161 kids were controlled from the birth to the 102 days of age. Every 15 days the kids were weighed, previous fasting with separation of the mother from afternoon of the previous day. The variables included were date and weight at birth, sex, childbirth type and weights every 15 days. The results show that the average weight to the birth was 2.562 ± 0.583 kg, the males surpassing females (p<0.01) in 9.57 percent (0.232 kg). Differences were observed in favour of those of simple childbirth. The final weight was 10.186 ± 2.723 kg for the females and 11.508 ± 3.616 kg for the males. The males from simple childbirth reached a greater weight (12.229 kg). The average daily weight gain (g) for all the animals was of 82.37 ± 26.9 g. The weight at the first month reached 106.2 g; at the second 95.5 g and 53.9 g at third. The smaller gains are observed in the females born from double childbirth with 64.01 ± 17.1 g, whereas the best growth behavior was find in males from simple childbirth with 94.34 ± 30.31 g. The better adjustment of the growth was obtained with potential type equations for the total of kids (Y= 3.23X0.262); second degree polynomial equations were better for the females (Y= 3.35 + 0.07497X -0.00007085 X2); potential equations for males (Y= 4.23X0.21); and also, potential for kids of simple childbirth (Y= 3.91X0.23) and second degree polynomial equations for kids of double childbirth (Y= 3.26 + 0.0947X - 0.00002069 X2).En el Estado de Puebla, México, se desarrolló la presente investigación con el objetivo de describir la tendencia en el crecimiento de cabritos criollos mediante la evaluación de la ganancia media diaria de peso (GMDp). Se dio seguimiento individual a 161 cabritos desde el nacimiento hasta los 102 días de edad, pesándose cada 15 días, previo ayuno con separación de la madre desde la tarde del día anterior. Las variables consideradas fueron fecha y peso de nacimiento, sexo, tipo de parto y pesos quincenales. Los resultados muestran que el peso promedio al nacimiento es de 2,562 ± 0,583 kg, superando los machos a las hembras (p<0,01) en un 9,57 p.100 (0,232 kg). Los de parto simple tuvieron mejor comportamiento. El peso final fue de 10,186 ± 2,723 kg para las hembras y de 11,508 ± 3,616 kg para los machos. La ganancia media diaria de peso (g) para el total de los animales fue de 82,37 ± 26,9 g en promedio. Por períodos, al primer mes alcanzan 106,2 g; en el segundo 95,5 g y 53,9 en el tercero. Las menores ganancias se observan en las hembras nacidas de parto gemelar, con 64,01 ± 17,1 g, mientras que el mejor comportamiento lo tienen los machos simples con 94,34 ± 30,31g. Las ecuaciones de mejor ajuste del crecimiento fueron de tipo potencial para el total de cabritos (Y= 3,23X 0,262); polinomial de segundo grado para las hembras (Y= 3,35 + 0,07497X - 0,00007085X2); potencial para machos (Y= 4,23X 0,21); potencial para cabritos de parto simple (Y =3,91X 0,23) y polinomial de segundo grado para cabritos de parto doble (Y= 3,26 + 0,0947X - 0,00002069X2)
Biogas production from the specialized dairy farming and porcine subsectors in Antioquia, Colombia: theoretical and technical-energy potential approach
Received: February 23rd, 2022 ; Accepted: May 1st, 2022 ; Published: May 11th, 2022 ; Correspondence: [email protected] developing countries, residual biomass usage by means of anaerobic digestion offers
several benefits and opportunities, such as a sustainable energy source, production of organic
fertilizers and new agrobusiness models. In Latin America, Colombia is one of the most
promising markets for the implementation of this technology in terms of availability of biomass
and economic growth, as recently reported by local government organizations. In this paper,
special attention is given to Antioquia, a department of Colombia with the largest farms of cattle
and pigs, according to information reported in 2018 by the Ministry of Agriculture and Rural
Development. It is estimated that manure from the porcine subsector in Antioquia has an
approximate technical-energy potential of 1,896 TJ year-1
, varying from 1,611 to 2,186 TJ year-1
,
corresponding to the 95% confidence interval. In the case of manure generated by the livestock
subsector in Antioquia, it is estimated a theoretical energy potential of 8,566 TJ year-1
. However,
traditional extensive production systems disseminate manure through the pastures turning
centralization of the available residual biomass a difficult task and not senseful. Based on the
local practices of the specialized dairy subsector, it is estimated that manure collected during the
milking process could reached up to 25% of the total available. Biochemical conversion of this
amount of biomass has an estimated technical-energy potential of 187 TJ year-1
, varying from
156 and 236 TJ year-1
, corresponding to the 95% confidence. The aim of this article is to estimate
the technical-energy potential for the livestock and porcine subsectors in the Department of
Antioquia, based on the available residual biomass according to local farming practices
Fibrosarcoma Originating In The Mandible
Fibrosarcoma is a malignant mesenchymal neoplasm of fibroblasts that rarely affects the oral cavity and can cause local recurrences or metastasis. In this article we describe a case of primary fibrosarcoma in the mandible in a 16-year-old girl. Microscopically the tumor showed an intense proliferation of spindle-shaped cells, varying little in size and shape and arranged in parallel bands, partly crossing each other, the mitotic activity was increased and there was nuclear pleomorphism. Immunohistochemically the cells only showed immunoreactivity for vimentin and negativity for S-100 protein, CD 68, cytokeratin cocktail, HMB-45, CD34, pan actin HHF 35, desmin, smooth muscle actin and epithelial membrane antigen (EMA). Based on clinical, radiological, histological and immunohistochemical findings the final diagnosis was high-grade intra-osseous fibrosarcoma. The treatment choice was radical surgery with mandibular reconstruction. After one year and nine months of the treatment the patient displayed multiple metastases. Radiation therapy and chemotherapy were used as adjuvant treatment. Unfortunately, the girl died two years after the initial diagnosis. © Medicina Oral S. L. C.I.F. B 96689336.113191194Lo Muzio, L., Mignogna, M.D., Pannone, G., Staibano, S., Testa, N.F., A rare case of fibrosarcoma of the jaws in a 4-year-old male (1998) Oral Oncol, 34, pp. 383-386Richardson, J.F., Fine, M.A., Goldman, H.M., Fibrosarcoma of the mandible: A clinicopathologic controversy: Report of a case (1972) J Oral Surg, 30, pp. 664-668Mark, R.J., Sercarz, J.A., Tran, L., Selch, M., Calcaterra, T.C., Fibrosarcoma of the Head and Neck. The UCLA experience (1991) Arch Otolaryngol Head Neck Surg, 117, pp. 396-401McKenna, W.G., Barnes, M.M., Kinsella, T.J., Rosenberg, S.A., Lack, E.E., Glatstein, E., Combined modality treatment of adult soft tissue sarcomas of the head and neck (1987) Int J Radiat Oncol Biol Phys, 13, pp. 1127-1133Van Blarcom, C.W., Masson, J.K., Dahlin, D.C., Fibrosarcoma of the mandible. A clinicopathologic study (1971) Oral Surg Oral Med Oral Pathol, 32, pp. 428-439Sadoff, R.S., Rubin, M.M., Fibrosarcoma of the mandible: A case report (1990) J Am Dent Assoc, 121, pp. 247-248Handlers, J.P., Abrams, A.M., Melrose, R.J., Milder, J., Fibrosarcoma of the mandible presenting as a periodontal problem (1985) J Oral Pathol, 14, pp. 351-356Pereira, C.M., Jorge Junior, J., Di Hipólito, O., Kowalski, L.P., Lopes, M.A., Primary intraosseous fibrosarcoma of jaw (2005) Int J Oral Maxillofac Surg, 34, pp. 579-581Antonescu, C.R., Erlandson, R.A., Huvos, A.G., Primary fibrosarcoma and malignant fibrous histiocytoma of bone - A comparitive ultrastructural study: Ecidence of a spectrum of fibroblastic differentiation (2000) Ultrastruct Pathol, 24, pp. 83-91Mosqueda-Taylor, A., Meneses-García, A., Ruíz-Godoyrivera Lm Suárez-Roa, M.I., Luna-Ortiz, K., Malignant odontogenic tumors. A retrospective and collaborative study of seven cases (2003) Med Oral, 8, pp. 110-121Huguet, P., Castellvi, J., Avila, M., Alejo, M., Autonell, F., Basas, C., Ameloblastic fibrosarcoma: Report of a case. Immunohistochemical study and review of the literature (2001) Med Oral, 6, pp. 173-179Yamaguchi, S., Nagasawa, H., Suzuki, T., Fujii, E., Iwaki, H., Takagi, M., Sarcomas of the oral and maxillofacial region: A review of 32 cases in 25 years (2004) Clin Oral Invest, 8, pp. 52-55Lukinmaa, P.L., Hietanen, J., Swan, H., Ylipaavalniemi, P., Perkki, K., Maxillary fibrosarcoma with extracellular immuno-characterization (1988) Br J Oral Maxillofac Surg, 26, pp. 36-4
Modelling the prestress transfer in pre-tensioned concrete elements
Three models were developed to simulate the transfer of prestress force from steel to concrete in pre-tensioned concrete elements. The first is an analytical model based on the thick-walled cylinder theory and considers linear material properties for both steel and concrete. The second is an axi-symmetric finite element (FE) model with linear material properties; it is used to verify the analytical model. The third model is a three dimensional nonlinear FE model. This model considers the post-cracking behaviour of concrete as well as concrete shrinkage and the time of prestress releasing. A new expression from the analytical model is developed to estimate the transmission length as well as the stress distribution along the tendon. The paper also presents a parametric study to illustrate the impact of diameter of prestressing steel, concrete cover, concrete strength, initial prestress, section size, surface roughness of prestressing steel, time of prestress release, and the member length on the transfer of stress in pre-tensioned concrete elements
Alexithymia and depression in elderly people that get directed physical activity
La relación entre la alexitimia y la depresión y los factores sociodemográficos ha sido estudiada en personas mayores. Sin embargo, el papel atenuador del ejercicio en estas afecciones aún debe ser determinado. En el presente estudio se mide el grado de alexitimia y depresión en adultos mayores, comparando una muestra sedentaria con una de practicantes de actividad física. Se utilizó un diseño descriptivo transversal con una muestra compuesta por 27 participantes, 9 hombres y 18 mujeres de más de 60 años (64 ± 5.1 años), con objeto de medir el grado de alexitimia y depresión que presentaban en el momento de la recogida de datos. Los instrumentos utilizados fueron la escala de depresión de Yesavage, la Escala de Alexitimia de Toronto (TAS-20) y el Cuestionario de Salud SF-12. Los resultados mostraron que los practicantes de actividad física presentaban puntuaciones más bajas en alexitimia y depresión que los sujetos sedentarios, sin que éstas variables estuvieran relacionadas en función del género y la edad. A tenor de los resultados, el ejercicio pudiera jugar algún papel en la modulación de las alteraciones psicológicas
Rings and bars: unmasking secular evolution of galaxies
Secular evolution gradually shapes galaxies by internal processes, in
contrast to early cosmological evolution which is more rapid. An important
driver of secular evolution is the flow of gas from the disk into the central
regions, often under the influence of a bar. In this paper, we review several
new observational results on bars and nuclear rings in galaxies. They show that
these components are intimately linked to each other, and to the properties of
their host galaxy. We briefly discuss how upcoming observations, e.g., imaging
from the Spitzer Survey of Stellar Structure in Galaxies (S4G), will lead to
significant further advances in this area of research.Comment: Invited review at "Galaxies and their Masks", celebrating Ken
Freeman's 70-th birthday, Sossusvlei, Namibia, April 2010. To be published by
Springer, New York, editors D.L. Block, K.C. Freeman, & I. Puerari; minor
change
Anisotropic flow of charged hadrons, pions and (anti-)protons measured at high transverse momentum in Pb-Pb collisions at TeV
The elliptic, , triangular, , and quadrangular, , azimuthal
anisotropic flow coefficients are measured for unidentified charged particles,
pions and (anti-)protons in Pb-Pb collisions at TeV
with the ALICE detector at the Large Hadron Collider. Results obtained with the
event plane and four-particle cumulant methods are reported for the
pseudo-rapidity range at different collision centralities and as a
function of transverse momentum, , out to GeV/.
The observed non-zero elliptic and triangular flow depends only weakly on
transverse momentum for GeV/. The small dependence
of the difference between elliptic flow results obtained from the event plane
and four-particle cumulant methods suggests a common origin of flow
fluctuations up to GeV/. The magnitude of the (anti-)proton
elliptic and triangular flow is larger than that of pions out to at least
GeV/ indicating that the particle type dependence persists out
to high .Comment: 16 pages, 5 captioned figures, authors from page 11, published
version, figures at http://aliceinfo.cern.ch/ArtSubmission/node/186
Centrality dependence of charged particle production at large transverse momentum in Pb-Pb collisions at TeV
The inclusive transverse momentum () distributions of primary
charged particles are measured in the pseudo-rapidity range as a
function of event centrality in Pb-Pb collisions at
TeV with ALICE at the LHC. The data are presented in the range
GeV/ for nine centrality intervals from 70-80% to 0-5%.
The Pb-Pb spectra are presented in terms of the nuclear modification factor
using a pp reference spectrum measured at the same collision
energy. We observe that the suppression of high- particles strongly
depends on event centrality. In central collisions (0-5%) the yield is most
suppressed with at -7 GeV/. Above
GeV/, there is a significant rise in the nuclear modification
factor, which reaches for GeV/. In
peripheral collisions (70-80%), the suppression is weaker with almost independently of . The measured nuclear
modification factors are compared to other measurements and model calculations.Comment: 17 pages, 4 captioned figures, 2 tables, authors from page 12,
published version, figures at
http://aliceinfo.cern.ch/ArtSubmission/node/284
Measurement of charm production at central rapidity in proton-proton collisions at TeV
The -differential production cross sections of the prompt (B
feed-down subtracted) charmed mesons D, D, and D in the rapidity
range , and for transverse momentum GeV/, were
measured in proton-proton collisions at TeV with the ALICE
detector at the Large Hadron Collider. The analysis exploited the hadronic
decays DK, DK, DD, and their charge conjugates, and was performed on a
nb event sample collected in 2011 with a
minimum-bias trigger. The total charm production cross section at TeV and at 7 TeV was evaluated by extrapolating to the full phase space
the -differential production cross sections at TeV
and our previous measurements at TeV. The results were compared
to existing measurements and to perturbative-QCD calculations. The fraction of
cdbar D mesons produced in a vector state was also determined.Comment: 20 pages, 5 captioned figures, 4 tables, authors from page 15,
published version, figures at
http://aliceinfo.cern.ch/ArtSubmission/node/307
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