19 results
Does intensive home treatment change treatment trajectories of psychiatric disorders?
- A. Martín-Blanco, A. González-Fernández, A. Farré, S. Vieira, P. Alvaro, C. Isern, D. Giménez, C. Torres, V. de la Cruz, C. Martín, N. Moll, O. Castro, M. Sagué-Vilavella
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- Journal:
- European Psychiatry / Volume 66 / Issue S1 / March 2023
- Published online by Cambridge University Press:
- 19 July 2023, pp. S167-S168
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Introduction
Intensive home treatment (IHT) for people experiencing a mental health crisis has been progressively established in many western countries as an alternative to in-ward admission. But is this a real alternative? We previously reported that patients treated in our IHT unit only differ from those voluntarily admitted to hospital in suicidal risk and severe behaviour disorders (not in other factors such as clinical severity) (Martín-Blanco et al., Rev Psiquiatr Salud Ment 2022;15:213-5). Now we are interested in disentangle if those patients who used to require inward management can be successfully treated at home.
ObjectivesTo describe subsequent treatment trajectories of the first 1000 admissions to our IHT unit and to compare clinical characteristics among the different groups of trajectories.
MethodsRetrospective cohort study. Subsequent treatment trajectories were collected from December 2016 to October 2022 and classified: absence, hospital, IHT, and mixed (hospital and IHT). Statistical significance was tested by means of ANOVA or Kruskal-Wallis test for quantitative variables (corrected for multiple comparisons) and chi-square tests for qualitative variables.
ResultsTables 1 shows the characteristics of the whole sample. Of the 1000 IHT admissions, 12.1% needed subsequent hospital admission(s), 12.7% IHT admission(s), and 9.3% mixed admission(s). There were no differences among these groups in median severity at IHT admission, but there were differences in the number of previous admissions (p=0.0001): the group with no subsequent admissions had less previous admissions than the other groups (pBonf<0.0001), and the group with subsequent IHT admissions had less than the group with mixed admissions (pBonf=0.0123). There were differences between groups regarding distribution of diagnoses (p<0.0001) (Fig. 1). When considering subsequent admissions by diagnosis, there were differences in severity at IHT admission (p=0.0068) and in number of previous hospitalizations (p<0.0001) (Fig. 2).
Table 1. Clinical characteristics of the whole sample (N=1000) mean SD Age (years) 47.07 17.02 CGI-s at admission * 5 4-5 N % Sex (female) 548 54.8% Psychotic disorders 463 46.3% Affective disorder 257 25.7% Bipolar disorder 128 12.8% Other disorders 152 15.2% Hospital admission in the previous 5 years 313 31.3% CGI-s: clinical global impression - severity. * median and IQR
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ConclusionsPatients that used to require inward management can now be treated at home when suffering an acute episode. Therefore, IHT has changed treatment trajectories for some patients with psychiatric disorders.
Disclosure of InterestNone Declared
Sociodemographic and clinical characteristics of the population with a first psychotic episode attended in the mental health services of area 5 of Madrid (Spain)
- J. Garde González, P. Herrero Ortega, A. Oliva Lozano, I. I. Louzao Rojas, M. P. Vidal-Villegas, A. Muñoz-Sanjosé, M. P. Sánchez-Castro, G. Lahera, S. Sánchez Quílez, M. F. Bravo-Ortiz, O. B. O. A.-M. Group
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- Journal:
- European Psychiatry / Volume 66 / Issue S1 / March 2023
- Published online by Cambridge University Press:
- 19 July 2023, p. S443
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Introduction
Risk of functional impairment and progression to chronic illness in people with a first episode of psychosis (FEP) has motivated early intervention programs, showing promising results. Defining the characteristics of people with FEP at local level enables the clinicians to adjust interventional models to the reality of the population. The area 5 of Madrid (Spain) is referred to La Paz University Hospital and it serves a catchment area of roughly 527,000 people.
ObjectivesWe aim to identify sociodemographic and clinical characteristics of patients in the area 5 of Madrid (Spain) who meet the criteria of FEP.
MethodsA descriptive retrospective study including 179 people (age range 18-40 years) who were attended in mental health services of La Paz University Hospital (area 5 of Madrid, Spain), between January 2019 and May 2020, having suffered a psychotic episode in the last five years.
ResultsThe average age of people with FEP was 29.32 years, with a higher proportion of men (62%). The mean duration of untreated psychosis (DUP) was 3.64 months and 47% of patients consume cannabis. We found disparities in DUP among the different districts in the area and we also observed differences depending on the district for inclusion in rehabilitation programs or psychotherapy. The following averages were obtained for the aggregate sample: 1.01 hospitalization/year, 1.42 emergency room visits/year, 1.81 years of illness and a mean dosage equivalent to olanzapine 6.75 mg/day. The incidence of psychosis in our area has been 7.01 cases per 100000 inhabitants/year.
ConclusionsThe incidence of psychosis has been as expected according to data recorded at previous studies in Spain. The results obtained in our sample have included a lower DUP and a higher use of cannabis than those described in the literature. We have also found differences when observing the inclusion of patients in different treatments (psychotherapy, rehabilitation), which may be related to the differences in the DUP by districts. Further exploration in this field is needed to draw causal conclusions.
Disclosure of InterestNone Declared
Structural brain abnormalities in schizophrenia in adverse environments: examining the effect of poverty and violence in six Latin American cities
- Nicolas A. Crossley, Andre Zugman, Francisco Reyes-Madrigal, Leticia S. Czepielewski, Mariana N. Castro, Ana M. Diaz-Zuluaga, Julian A. Pineda-Zapata, Ramiro Reckziegel, Ary Gadelha, Andrea Jackowski, Cristiano Noto, Luz M. Alliende, Barbara Iruretagoyena, Tomas Ossandon, Juan P. Ramirez-Mahaluf, Carmen P. Castañeda, Alfonso Gonzalez-Valderrama, Ruben Nachar, Pablo León-Ortiz, Juan Undurraga, Carlos López-Jaramillo, Salvador M. Guinjoan, Clarissa S. Gama, Camilo de la Fuente-Sandoval, Rodrigo A. Bressan
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- Journal:
- The British Journal of Psychiatry / Volume 218 / Issue 2 / February 2021
- Published online by Cambridge University Press:
- 18 August 2020, pp. 112-118
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- February 2021
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Background
Social and environmental factors such as poverty or violence modulate the risk and course of schizophrenia. However, how they affect the brain in patients with psychosis remains unclear.
AimsWe studied how environmental factors are related to brain structure in patients with schizophrenia and controls in Latin America, where these factors are large and unequally distributed.
MethodThis is a multicentre study of magnetic resonance imaging in patients with schizophrenia and controls from six Latin American cities. Total and voxel-level grey matter volumes, and their relationship with neighbourhood characteristics such as average income and homicide rates, were analysed with a general linear model.
ResultsA total of 334 patients with schizophrenia and 262 controls were included. Income was differentially related to total grey matter volume in both groups (P = 0.006). Controls showed a positive correlation between total grey matter volume and income (R = 0.14, P = 0.02). Surprisingly, this relationship was not present in patients with schizophrenia (R = −0.076, P = 0.17). Voxel-level analysis confirmed that this interaction was widespread across the cortex. After adjusting for global brain changes, income was positively related to prefrontal cortex volumes only in controls. Conversely, the hippocampus in patients with schizophrenia, but not in controls, was relatively larger in affluent environments. There was no significant correlation between environmental violence and brain structure.
ConclusionsOur results highlight the interplay between environment, particularly poverty, and individual characteristics in psychosis. This is particularly important for harsh environments such as low- and middle-income countries, where potentially less brain vulnerability (less grey matter loss) is sufficient to become unwell in adverse (poor) environments.
EPA-0384 – Anxiety and Selective Attention in Adhd Subtypes
- M. Cueli, P. González-Castro, L. Álvarez, J.C. Núñez, E. Fernández
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- European Psychiatry / Volume 29 / Issue S1 / 2014
- Published online by Cambridge University Press:
- 15 April 2020, p. 1
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One of the disorders that most affects school and social performance is attention deficit disorder associated with hyperactivity or impulsivity (ADHD). The criteria established by DSM-IV-TR edition distinguish three subtypes: inattentive, hyperactive-impulsive and combined. There are other factors that increase the severity of the disorder. These factors have to do with different associated psychopathologies such as learning difficulties, depression, oppositional defiant disorder, behavior disorder, anxiety disorders and mood disorders. Mean comorbidity of ADHD with anxiety disorders is estimated at 20–25%. The main goal of this investigation is to determine whether there are differential patterns of attention (selective and concentration using D-2 attention test) and anxiety (trait and state anxiety using State-Trait Anxiety Inventory for Children) for these three types of ADHD. The sample was made up of 220 children (6–12 years): 56 in the control group, 54 with predominantly attention deficit disorder, 53 with predominantly hyperactivity-impulsivity disorder and 57 with combined inattentive-hyperactive disorder. We used a design of four groups, three corresponding to the ADHD subtypes and a control group without ADHD. The results obtained show that the four groups of subjects were significantly different in the two attentional variables and in trait and state anxiety. The combined subtype presents higher trait anxiety, whereas the inattentive subtype shows higher levels of state anxiety. The results reveal a new path of great interest concerning objective and reliable diagnostic assessment, and pharmacological and behavioral intervention adapted to each specific situation.
P-275 - Examination of Blood Flow Patterns in Adhd Through a Continuous Performance Test
- M. Cueli, T. García-Fernández, P. González-Castro, L. Álvarez
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- European Psychiatry / Volume 27 / Issue S1 / 2012
- Published online by Cambridge University Press:
- 15 April 2020, p. 1
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A very important determinant of school performance is attention deficit disorder with or without hyperactivity or impulsivity. the criteria established by the DSM-IV-TR are one of the most widely accepted procedures to diagnose the deficit. There are three different subtypes: inattentive, hyperactive-impulsive and combined. Gonzalez-Castro et al., (2010) demonstrated empirically that the subtypes of ADHD often score significantly different in the prefrontal and central areas of the cortex. This is the reason why it is convenient to carry out more studies in the measure of Q-EEG (electrical activity) combined with that of nir-HEG (blood activity). Rodríguez, et al., (2011) apply both instruments (Q-EEG and nir-HEG) to a sample of 70 students and verify that the nir-HEG differentiates significantly the ADHD subjects of the control group and the combined and inattentive subtype for the Fp1 variable, associated to the executive control. These results might be caused by the time taken to do the evaluation (35 seconds). Therefore, the reason of this research is to assess the instrument over a long period of time while performing a continuous performing task (CPT). the results show statistically significant differences between the control group and the other with ADHD and among the subtypes in the variables of executive control and short evaluation with the nir-HEG. As for the long evaluation of blood oxygenation during a performance of an executive task, some differences can be seen among the subtypes with ADHD, although not statistically significant.
P-288 - Conductual Evaluation of Executive Functioning in Attention Deficit Hyperactivity Disorder and Reading Disabilities: Utility of the Brief Scale (gioia et Al., 2000) Adaptated Into Spanish
- T. García-Fernández, P. González-Castro, M. Fernández-Cueli, C. Rodríguez-Pérez
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- European Psychiatry / Volume 27 / Issue S1 / 2012
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- 15 April 2020, p. 1
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Association between attention deficit hyperactivity disorder (ADHD) and reading disorder (RD) is frequent. They are two of the most common disorders among school-age children and co-occurrence of both disorders range from 20% to 40% (Bental et al., 2007; Willcutt et al., 2010). Our main goal was to know if both disorders share common executive deficits and which are the main deficient areas.
Method:we assessed the executive functioning in a sample of 79 children and teens with ADHD (n = 43) and ADHD+RD (n = 36), aged 6 to 16, through the administration of the BRIEF-Parent form (Behavior Rating Inventory of Executive Function; Gioia, Isquith, Guy, & Kenworthy, 2000). This scale measures eight components of the executive function, focusing in daily behaviors associated with executive functioning. However, it is not available in Spanish language. for this reason we translated the scale into Spanish and we made an exploratory study with an initial sample of 90 boys and girls, aged 5 to 18, getting some acceptable psychometric properties.
Results:The co-morbid group shared the basic characteristic impairments in executive functions with the pure ADHD. in addition, this group showed a more severe impairment in working memory, monitor and planification.
Conclusions:the results point to a different and more impaired clinical profile in the co-morbid condition. Finally, executive functioning should be considered in the diagnosis of RD and in the design of reading learning programs, which have been focused primarily on the linguistic nature of the task forgetting other possible relevant domains.
EPA-0386 – Execution, Activation and Blood Flow Hemoencephalography in Children with and Without Adhd: A Structural Equation Model
- P. González-Castro, C. Rodríguez, M. Cueli, J.C. Núñez, J.A. González-Pienda
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- European Psychiatry / Volume 29 / Issue S1 / 2014
- Published online by Cambridge University Press:
- 15 April 2020, p. 1
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Attention Deficit and Hyperactivity Disorder (ADHD) is one of the problems that most affects academic performance in childhood and adolescence. Current research raises the existence of certain patterns of cortical activation and executive control, which could help to identify more objectively ADHD diagnosis. These studies consist on recording brain activation in central and prefrontal cortex areas through electroencephalographic measures using Q-EEG, and blood flood activity or hemoencephalography with nir-HEG. Moreover, executive control, evaluated with Continuous Performance Tests (CPTs), has been widely used to verify the incidence of brain activation levels on performance. This research aims to analyze the interaction between brain activation (nir-HEG and Q-EEG) and executive control (CPT) variables in a sample of 499 students (174 females and 325 males) aged 8 to 16, 256 (51.3%) with and 243 (48.7%) without ADHD. To accomplish this, a causal modelwas testedusing Structural Equation Modeling (SEM) analyses with AMOS.Results indicated that: a) activation measures influence different types of executive pattern, b) the relation between activation variables (nir-HEG and Q-EEG) depends on which brain areais studied and, c) with a good fit, both models (with and without ADHD), show important differences in variables correlation. These results highlight the utility of cortical activation and executive control measures for the differential diagnosis of ADHD, as well as from the standpoint of intervention, providing useful clues to delineate more adapted treatments.
EPA-0387 – Association Between Executive Dysfunction and Behavioral Disorders in Elementary School Students
- P. González-Castro, D. Álvarez-García, T. García, LA. Segurola, A. Dobarro
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- European Psychiatry / Volume 29 / Issue S1 / 2014
- Published online by Cambridge University Press:
- 15 April 2020, p. 1
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Behavioral disorders at school have negative consequences for students' social development and academic achievement. A better understanding of their causes would help to develop more adapted prevention and intervention strategies. This study analyzes the association between behavioral disorders and executive dysfunctions in Elementary School students. A sample of 974 students from third to sixth grade of Primary School (aged 7 to 12), belonging to 30 schools in Asturias (Northern Spain), as well as their families and teachers, took part in this study. Behavioral disorders were assessed through teachers' completion of ACE rating-scale (Arias, Ayuso, Gil & Gonzalez, 2009). The frequency of occurrence of behaviors associated with deficits in nine executive functions (impulsivity, hyperactivity, emotional control, functional memory, planning, organization, cognitive flexibility, concentration and focus) was assessed by means of the EFE scale (developed by the authors) in its three forms (student self-report, and teachers and family rating-scales). Spearman correlation coefficients between scores obtained in ACE and the nine executive functioning components of EFE scale in its three forms were calculated. Statistically significant correlations between both measures were obtained. The strongest correlations were found between disruptive behavior and Impulsivity, Hyperactivity and Emotional Control. Results were consistent for the three forms of the EFE scale, being correlations higher when teachers were the informant. This study highlights the relevance of considering executive functioning components for the prevention and treatment of behavioral disorders.
P-292 - Training Program by Mean Nirheg and Neurobiofeedback in Adhd Students
- P. González-Castro, M. Cueli, T. García-Fernández, D. Álvarez
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- European Psychiatry / Volume 27 / Issue S1 / 2012
- Published online by Cambridge University Press:
- 15 April 2020, p. 1
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Currently, there are many drugs to treat Attention Deficit Disorder with Hyperactivity. in addition, what has prover to be complimentary to drug therapy is behavioral training for parents and teachers as well as training on social skills and behavioral modification. Current studies using nir-HEG (blood activity), which, significantly differentiate ADHD children in the control group and the combined and inattentive subtype for the variable Fp1, associated with executive control. the instrument nir-HEG instrument allows the training of cortical activation favoring the increase of the latter. in 2000, Toomim et al performed a treatment study with a group of 26 subjects. Most (14) had been diagnosed with ADHD and each participant was submited to an evaluation of 10 sessions (in three areas of the prefrontal cortex). Participants in the experimental group showed a gain of nearly one standard deviation in TOVA. in this study, a five-subject design case was employed and ten sessions of HEG were administered. However we show another results contrasting nirHEG measures (ratio, attention index) with another attention measure. Data showed positive gain indicating success when increasing the biofeedback signal. for example children trained with HEG, gain a significant improvement in terms of selective and sustained attention. However, the gain of the experimental group at the end of training is important and can amount to 31.5%. the results open a scope of great interest to be more precise in the intervention from the behavioral and pharmacological point of view.
Dual diagnosis: On the Way to an Integrated Treatment Model?
- I. Ezquiaga, Z. González Vega, P. Rossi, F. Fonseca, C. Tamarit, C. Castillo, I. Castro, M. Torrens
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- European Psychiatry / Volume 41 / Issue S1 / April 2017
- Published online by Cambridge University Press:
- 23 March 2020, pp. S134-S135
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Introduction
Substance use disorders (SUD) with psychiatric co-morbidity (dual diagnosis) represent a challenge for both mental health and addiction networks. Dual patients present greater disorder severity and worse prognosis than those with SUD or psychiatric disorders alone. There is a lack of consensus regarding which treatment model (sequential, parallel or integrated) is the most appropriate for them. Despite integrated treatment is seen as the model of excellence, it is a standard difficult to achieve.
Objectives/AimsTo describe the presence of dual diagnosis and treatment model received in a sample recruited from a drug abuse community center in Barcelona (CAS Barceloneta).
MethodsCross-sectional descriptive analysis of an outpatient center for SUD clinical sample regarding psychiatric co-morbidity (DSM-IV-TR criteria), social-demographic characteristics and treatment model received.
ResultsIn the moment of this study, a total of 574 SUD patients are attended at CAS Barceloneta. Of them, 300 (52%) present a dual diagnosis, 64% men, mean age = 48 (SD = 11.29). Thirteen percent (n = 40) of dual patients have psychotic disorder (PsyD) diagnosis and their SUD comorbidities are: alcohol-UD (12.5%, n = 5), cocaine-UD (7.5%, n = 3), cannabis-UD (15%, n = 6), opioids-UD (17.5%, n = 7) and multiple SUD (47.5%, n = 19). Half of dual patients with PsyD (n = 20) are attended in parallel in community mental health centers.
ConclusionsOur results suggest there is an important percentage of SUD patients that present psychiatric co-morbidity treated in drug abuse community centers. Parallel treatment is mainly for PsyD patients and sometimes they get lost in the gaps. We would need to develop specific dual programs to give these patients an integrated assistance.
Disclosure of interestThe authors have not supplied their declaration of competing interest.
Influence of social cognition as a mediator between cognitive reserve and psychosocial functioning in patients with first episode psychosis
- I González-Ortega, A González-Pinto, S Alberich, E Echeburúa, M Bernardo, B Cabrera, S Amoretti, A Lobo, C Arango, I Corripio, E Vieta, E de la Serna, R Rodriguez-Jimenez, R Segarra, JM López-Ilundain, AM Sánchez-Torres, MJ Cuesta, PEPs Group:, I Zorrilla, P López, M Bioque, G Mezquida, F Barcones, C De-la-Cámara, M Parellada, A Espliego, A Alonso-Solís, EM Grasa, C Varo, L Montejo, J Castro-Fornieles, I Baeza, M Dompablo, I Torio, A Zabala, JI Eguiluz, L Moreno-Izco, J Sanjuan, R Guirado, I Cáceres, P Garnier, F Contreras, J Bobes, S Al-Halabí, J Usall, A Butjosa, S Sarró, R Landin-Romero, A Ibáñez, G Selva
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- Journal:
- Psychological Medicine / Volume 50 / Issue 16 / December 2020
- Published online by Cambridge University Press:
- 22 October 2019, pp. 2702-2710
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Background
Social cognition has been associated with functional outcome in patients with first episode psychosis (FEP). Social cognition has also been associated with neurocognition and cognitive reserve. Although cognitive reserve, neurocognitive functioning, social cognition, and functional outcome are related, the direction of their associations is not clear. Therefore, the main aim of this study was to analyze the influence of social cognition as a mediator between cognitive reserve and cognitive domains on functioning in FEP both at baseline and at 2 years.
MethodsThe sample of the study was composed of 282 FEP patients followed up for 2 years. To analyze whether social cognition mediates the influence of cognitive reserve and cognitive domains on functioning, a path analysis was performed. The statistical significance of any mediation effects was evaluated by bootstrap analysis.
ResultsAt baseline, as neither cognitive reserve nor the cognitive domains studied were related to functioning, the conditions for mediation were not satisfied. Nevertheless, at 2 years of follow-up, social cognition acted as a mediator between cognitive reserve and functioning. Likewise, social cognition was a mediator between verbal memory and functional outcome. The results of the bootstrap analysis confirmed these significant mediations (95% bootstrapped CI (−10.215 to −0.337) and (−4.731 to −0.605) respectively).
ConclusionsCognitive reserve and neurocognition are related to functioning, and social cognition mediates in this relationship.
Feed resource selection of Criollo goats artificially infected with Haemonchus contortus: nutritional wisdom and prophylactic self-medication
- J. Ventura-Cordero, P. G. González-Pech, P. R. Jaimez-Rodriguez, G. I. Ortiz-Ocampo, C. A. Sandoval-Castro, J. F. J. Torres-Acosta
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Previous cafeteria studies suggested that a moderate natural gastrointestinal nematode (GIN) infection did not modify the resource selection of adult Criollo goats towards tannin-rich plants compared with worm-free goats. A higher infection with Haemonchus contortus could trigger a change in the resource selection behaviour towards tannin-rich foliage. Alternatively, goats might select plant species solely to meet their nutritional requirements. A cafeteria study investigated the effect of a high artificial infection with H. contortus on the feed resource selection of goats. Adult Criollo goats (37.5±4.8 kg BW) with browsing experience were distributed in two groups: the infected group (IG) with six animals artificially infected with H. contortus (6000 L3/animal); and the non-infected group (NIG) with six animals maintained worm-free. The experiment included two 5-day periods with additional 5-day adaptation period. In the first period, animals were offered foliage of five plant species with a decreasing gradient of condensed tannins (CT) (Mimosa bahamensis, Gymnopodium floribundum, Havardia albicans, Acacia pennatula, Lysiloma latisiliqum), and three plant species with negligible CT content (Leucaena leucocephala, Piscidia piscipula and Brosimum alicastrum). In the second period the foliage of B. alicastrum was withdrawn. A grain-based concentrate feed was offered daily at 1% BW in DM basis. Dry matter and nutrient intake was determined. Foliage selection of each experimental group was determined using the Chesson selection index. The H. contortus egg count per gram of faeces (EPG) was determined for infected goats twice daily. Chesson index showed a similar pattern of foliage selection on periods 1 and 2. Mean EPG of goats in IG was 2028±259 EPG during period 1 and 1 293±198 EPG during period 2 (P>0.05). During period 1, the selection pattern was highest for B. alicastrum (tannin-free), followed by a tannin-rich plant (M. bahamensis). These two plants remained as highly selected during period 2. The Chesson index showed that both experimental groups (IG and NIG) selected the same plant species in both periods. Thus, a high H. contortus infection did not affect selection of goats fed with CT-rich plants. Apparently, goats balanced their nutrient intake with the plants selected, showing evidence of nutritional wisdom. This balance may have helped to prevent excess protein in the diet and also to maintain a low GIN infection, both considered as examples of prophylactic self-medication.
Study of a modified ECAP die for producing nanostructured Al6060 alloy using 3D finite element simulation
- M. A. González-Lozano, P. Ponce-Peña, M.A. Escobedo-Bretado, R.H. Lara-Castro, B. X. Ochoa-Salazar
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- Journal:
- MRS Online Proceedings Library Archive / Volume 1818 / 07 July 2016
- Published online by Cambridge University Press:
- 07 July 2016, imrc2015s4g-p002
- Print publication:
- 07 July 2016
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Using Finite Element Method (FEM) simulations is possible to study the homogeneity of deformation in the Equal Channel Angular Pressing (ECAP) process. In this work an investigation about the influence of a modified die on strain distribution in an ecaped Al6060 alloy was carried out. Due to that, tensile stress occurs in the vicinity of upper surface of the specimen in the severe plastic deformation zone, which increases the cracking and fracture tendency of the specimen and impedes further ECAP processing, the conventional ECAP die was modified to eliminate the tensile stress and enhance the compressive stress in the severe plastic deformation zone and reducing the cracking and fracture tendency of the specimen. Finite element analysis demonstrated that the stress state changes from tensile to strongly compressive when using the modified die. The aim of this study is to evaluate the advantages/disadvantages of the modified ECAP die and processing conditions.
Nanostructured LB films developed from poly(p-acryloylaminophenylmethylphosphonic) acid
- Rosa E. Lazo-Jiménez, José A. Chávez-Carvayar, Ana M. Herrera-González, Valentin Islas-Pérez, María P. Carreón-Castro
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- Journal:
- MRS Online Proceedings Library Archive / Volume 1819 / 2016
- Published online by Cambridge University Press:
- 22 July 2016, imrc2015s4d-p032
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- 2016
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In this paper, the formation of Langmuir-Blodgett films of poly(p-acryloylaminophenylmethylphosphonic) acid polymers, with general formula (C10H12NPO4)n are reported. The Langmuir-Blodgett (LB) technique was used for building ordered nanostructures in molecular assemblies of these polymers, which were able to form stable films. At the air-water interface, these polymers (with low and high molecular weight) formed Langmuir (L) monolayers, which were characterized by surface pressure versus molecular area (π-A) isotherms and Brewster´s Angle Microscopy (BAM). Using the LB method, molecular mono and multilayer films of these polymers were prepared and transferred onto glass substrates forming Z-type multilayers, with a transfer ratio close to unity. These LB films were characterized by Atomic Force Microscopy (AFM).
The B Fields in OB Stars (BOB) Survey
- T. Morel, N. Castro, L. Fossati, S. Hubrig, N. Langer, N. Przybilla, M. Schöller, T. Carroll, I. Ilyin, A. Irrgang, L. Oskinova, F. R. N. Schneider, S. Simon Díaz, M. Briquet, J. F. González, N. Kharchenko, M.-F. Nieva, R.-D. Scholz, A. de Koter, W.-R. Hamann, A. Herrero, J. Maíz Apellániz, H. Sana, R. Arlt, R. Barbá, P. Dufton, A. Kholtygin, G. Mathys, A. Piskunov, A. Reisenegger, H. Spruit, S.-C. Yoon
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- Journal:
- Proceedings of the International Astronomical Union / Volume 9 / Issue S307 / June 2014
- Published online by Cambridge University Press:
- 23 January 2015, pp. 342-347
- Print publication:
- June 2014
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The B fields in OB stars (BOB) survey is an ESO large programme collecting spectropolarimetric observations for a large number of early-type stars in order to study the occurrence rate, properties, and ultimately the origin of magnetic fields in massive stars. As of July 2014, a total of 98 objects were observed over 20 nights with FORS2 and HARPSpol. Our preliminary results indicate that the fraction of magnetic OB stars with an organised, detectable field is low. This conclusion, now independently reached by two different surveys, has profound implications for any theoretical model attempting to explain the field formation in these objects. We discuss in this contribution some important issues addressed by our observations (e.g., the lower bound of the field strength) and the discovery of some remarkable objects.
Involvement of sulfated glycosaminoglycans on the development and attachment of Trypanosoma cruzi to the luminal midgut surface in the vector, Rhodnius prolixus
- MARCELO S. GONZALEZ, LUIZ-CLAUDIO F. SILVA, J. M. ALBUQUERQUE-CUNHA, NADIR F. S. NOGUEIRA, DÉBORA P. MATTOS, DANIELE P. CASTRO, PATRICIA AZAMBUJA, ELOI S. GARCIA
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- Journal:
- Parasitology / Volume 138 / Issue 14 / December 2011
- Published online by Cambridge University Press:
- 09 September 2011, pp. 1870-1877
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In the present study, we investigated the involvement of sulfated glycosaminoglycans in both the in vivo development and adhesion of T. cruzi epimastigotes to the luminal surface of the digestive tract of the insect vector, Rhodnius prolixus. Pre-incubation of T. cruzi, Dm 28c epimastigotes with heparin, chondroitin 4-sulfate, chondroitin 6-sulfate or protamine chloridrate inhibited in vitro attachment of parasites to the insect midgut. Enzymatic removal of heparan sulfate moieties by heparinase I or of chondroitin sulfate moieties by chondroitinase AC from the insect posterior midgut abolished epimastigote attachment in vitro. These treatments also reduced the labelling of anionic sites exposed at the luminal surface of the perimicrovillar membranes in the triatomine midgut epithelial cells. Inclusion of chondroitin 4-sulfate or chondroitin 6-sulfate and to a lesser extent, heparin, in the T. cruzi-infected bloodmeal inhibited the establishment of parasites in R. prolixus. These observations indicate that sulfated glycosaminoglycans are one of the determinants for both adhesion of the T. cruzi epimastigotes to the posterior midgut epithelial cells of the triatomine and the parasite infection in the insect vector, R. prolixus.
Emergence of ageing-related changes in insulin secretion by pancreatic islets of male rat offspring of mothers fed a low-protein diet
- S. Morimoto, L. Calzada, T. C. Sosa, L. A. Reyes-Castro, G. L. Rodriguez-González, A. Morales, P. W. Nathanielsz, E. Zambrano
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- Journal:
- British Journal of Nutrition / Volume 107 / Issue 11 / 14 June 2012
- Published online by Cambridge University Press:
- 09 September 2011, pp. 1562-1565
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- 14 June 2012
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Maternal low-protein (LP) diets programme β-cell secretion, potentially altering the emergence of ageing of offspring pancreatic function. We hypothesised that isolated pancreatic islet β-cell secretory responses are blunted in offspring exposed to LP during development and age-related reduction is influenced by the developmental stage of exposure to decreased nutrition. We studied male offspring of rats fed control (C) or LP protein (R) diets in pregnancy, first letter and/or lactation second letter of CC, RR, CR or RC groups. Serum glucose, insulin and homeostatic model assessment (HOMA) were measured. Pancreatic islets were isolated and in vitro insulin secretion quantified in low (LG – 5 mm) or high glucose (HG – 11 mm). Body weight and serum values between groups were similar at all ages. Insulin and HOMA rose with age and were highest at postnatal day (PND) 450 in all groups. At PND 36, insulin secretion was greatest in RR and RC. Only CC increased insulin secretion to HG. By PND 110, restricted groups responded less to LG but increased secretion to HG. By PND 450, CC offspring alone increased secretion to HG. Despite minimal differences in circulating insulin and glucose, reduced maternal protein intake affected insulin secretion at all ages. In addition, ageing reduced function in all R groups compared with CC by PND 110 and further by PND 450 most markedly in RC. We conclude that maternal LP diet during pregnancy and/or lactation impairs offspring insulin secretory response to a glucose challenge and alters the trajectory of ageing of pancreatic insulin secretion.
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- By Rose Teteki Abbey, K. C. Abraham, David Tuesday Adamo, LeRoy H. Aden, Efrain Agosto, Victor Aguilan, Gillian T. W. Ahlgren, Charanjit Kaur AjitSingh, Dorothy B E A Akoto, Giuseppe Alberigo, Daniel E. Albrecht, Ruth Albrecht, Daniel O. Aleshire, Urs Altermatt, Anand Amaladass, Michael Amaladoss, James N. Amanze, Lesley G. Anderson, Thomas C. Anderson, Victor Anderson, Hope S. Antone, María Pilar Aquino, Paula Arai, Victorio Araya Guillén, S. Wesley Ariarajah, Ellen T. Armour, Brett Gregory Armstrong, Atsuhiro Asano, Naim Stifan Ateek, Mahmoud Ayoub, John Alembillah Azumah, Mercedes L. García Bachmann, Irena Backus, J. Wayne Baker, Mieke Bal, Lewis V. Baldwin, William Barbieri, António Barbosa da Silva, David Basinger, Bolaji Olukemi Bateye, Oswald Bayer, Daniel H. Bays, Rosalie Beck, Nancy Elizabeth Bedford, Guy-Thomas Bedouelle, Chorbishop Seely Beggiani, Wolfgang Behringer, Christopher M. Bellitto, Byard Bennett, Harold V. Bennett, Teresa Berger, Miguel A. Bernad, Henley Bernard, Alan E. Bernstein, Jon L. Berquist, Johannes Beutler, Ana María Bidegain, Matthew P. Binkewicz, Jennifer Bird, Joseph Blenkinsopp, Dmytro Bondarenko, Paulo Bonfatti, Riet en Pim Bons-Storm, Jessica A. Boon, Marcus J. Borg, Mark Bosco, Peter C. Bouteneff, François Bovon, William D. Bowman, Paul S. Boyer, David Brakke, Richard E. Brantley, Marcus Braybrooke, Ian Breward, Ênio José da Costa Brito, Jewel Spears Brooker, Johannes Brosseder, Nicholas Canfield Read Brown, Robert F. Brown, Pamela K. Brubaker, Walter Brueggemann, Bishop Colin O. Buchanan, Stanley M. Burgess, Amy Nelson Burnett, J. Patout Burns, David B. Burrell, David Buttrick, James P. Byrd, Lavinia Byrne, Gerado Caetano, Marcos Caldas, Alkiviadis Calivas, William J. Callahan, Salvatore Calomino, Euan K. Cameron, William S. Campbell, Marcelo Ayres Camurça, Daniel F. Caner, Paul E. Capetz, Carlos F. Cardoza-Orlandi, Patrick W. Carey, Barbara Carvill, Hal Cauthron, Subhadra Mitra Channa, Mark D. Chapman, James H. Charlesworth, Kenneth R. Chase, Chen Zemin, Luciano Chianeque, Philip Chia Phin Yin, Francisca H. Chimhanda, Daniel Chiquete, John T. Chirban, Soobin Choi, Robert Choquette, Mita Choudhury, Gerald Christianson, John Chryssavgis, Sejong Chun, Esther Chung-Kim, Charles M. A. Clark, Elizabeth A. Clark, Sathianathan Clarke, Fred Cloud, John B. Cobb, W. Owen Cole, John A Coleman, John J. Collins, Sylvia Collins-Mayo, Paul K. Conkin, Beth A. Conklin, Sean Connolly, Demetrios J. Constantelos, Michael A. Conway, Paula M. Cooey, Austin Cooper, Michael L. Cooper-White, Pamela Cooper-White, L. William Countryman, Sérgio Coutinho, Pamela Couture, Shannon Craigo-Snell, James L. Crenshaw, David Crowner, Humberto Horacio Cucchetti, Lawrence S. Cunningham, Elizabeth Mason Currier, Emmanuel Cutrone, Mary L. Daniel, David D. Daniels, Robert Darden, Rolf Darge, Isaiah Dau, Jeffry C. Davis, Jane Dawson, Valentin Dedji, John W. de Gruchy, Paul DeHart, Wendy J. Deichmann Edwards, Miguel A. De La Torre, George E. Demacopoulos, Thomas de Mayo, Leah DeVun, Beatriz de Vasconcellos Dias, Dennis C. Dickerson, John M. Dillon, Luis Miguel Donatello, Igor Dorfmann-Lazarev, Susanna Drake, Jonathan A. Draper, N. Dreher Martin, Otto Dreydoppel, Angelyn Dries, A. J. Droge, Francis X. D'Sa, Marilyn Dunn, Nicole Wilkinson Duran, Rifaat Ebied, Mark J. Edwards, William H. Edwards, Leonard H. Ehrlich, Nancy L. Eiesland, Martin Elbel, J. Harold Ellens, Stephen Ellingson, Marvin M. Ellison, Robert Ellsberg, Jean Bethke Elshtain, Eldon Jay Epp, Peter C. Erb, Tassilo Erhardt, Maria Erling, Noel Leo Erskine, Gillian R. Evans, Virginia Fabella, Michael A. Fahey, Edward Farley, Margaret A. Farley, Wendy Farley, Robert Fastiggi, Seena Fazel, Duncan S. Ferguson, Helwar Figueroa, Paul Corby Finney, Kyriaki Karidoyanes FitzGerald, Thomas E. FitzGerald, John R. Fitzmier, Marie Therese Flanagan, Sabina Flanagan, Claude Flipo, Ronald B. Flowers, Carole Fontaine, David Ford, Mary Ford, Stephanie A. Ford, Jim Forest, William Franke, Robert M. Franklin, Ruth Franzén, Edward H. Friedman, Samuel Frouisou, Lorelei F. Fuchs, Jojo M. Fung, Inger Furseth, Richard R. Gaillardetz, Brandon Gallaher, China Galland, Mark Galli, Ismael García, Tharscisse Gatwa, Jean-Marie Gaudeul, Luis María Gavilanes del Castillo, Pavel L. Gavrilyuk, Volney P. Gay, Metropolitan Athanasios Geevargis, Kondothra M. George, Mary Gerhart, Simon Gikandi, Maurice Gilbert, Michael J. Gillgannon, Verónica Giménez Beliveau, Terryl Givens, Beth Glazier-McDonald, Philip Gleason, Menghun Goh, Brian Golding, Bishop Hilario M. Gomez, Michelle A. Gonzalez, Donald K. Gorrell, Roy Gottfried, Tamara Grdzelidze, Joel B. Green, Niels Henrik Gregersen, Cristina Grenholm, Herbert Griffiths, Eric W. Gritsch, Erich S. Gruen, Christoffer H. Grundmann, Paul H. Gundani, Jon P. Gunnemann, Petre Guran, Vidar L. Haanes, Jeremiah M. 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Jacob, Arthur James, Maria Jansdotter-Samuelsson, David Jasper, Werner G. Jeanrond, Renée Jeffery, David Lyle Jeffrey, Theodore W. Jennings, David H. Jensen, Robin Margaret Jensen, David Jobling, Dale A. Johnson, Elizabeth A. Johnson, Maxwell E. Johnson, Sarah Johnson, Mark D. Johnston, F. Stanley Jones, James William Jones, John R. Jones, Alissa Jones Nelson, Inge Jonsson, Jan Joosten, Elizabeth Judd, Mulambya Peggy Kabonde, Robert Kaggwa, Sylvester Kahakwa, Isaac Kalimi, Ogbu U. Kalu, Eunice Kamaara, Wayne C. Kannaday, Musimbi Kanyoro, Veli-Matti Kärkkäinen, Frank Kaufmann, Léon Nguapitshi Kayongo, Richard Kearney, Alice A. Keefe, Ralph Keen, Catherine Keller, Anthony J. Kelly, Karen Kennelly, Kathi Lynn Kern, Fergus Kerr, Edward Kessler, George Kilcourse, Heup Young Kim, Kim Sung-Hae, Kim Yong-Bock, Kim Yung Suk, Richard King, Thomas M. King, Robert M. Kingdon, Ross Kinsler, Hans G. Kippenberg, Cheryl A. 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Yee, Viktor Yelensky, Yeo Khiok-Khng, Gustav K. K. Yeung, Angela Yiu, Amos Yong, Yong Ting Jin, You Bin, Youhanna Nessim Youssef, Eliana Yunes, Robert Michael Zaller, Valarie H. Ziegler, Barbara Brown Zikmund, Joyce Ann Zimmerman, Aurora Zlotnik, Zhuo Xinping
- Edited by Daniel Patte, Vanderbilt University, Tennessee
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- The Cambridge Dictionary of Christianity
- Published online:
- 05 August 2012
- Print publication:
- 20 September 2010, pp xi-xliv
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Genetics of quality and agronomic traits in hard endosperm maize
- R. C. ALONSO FERRO, R. A. MALVAR, P. REVILLA, A. ORDÁS, P. CASTRO, J. MORENO-GONZÁLEZ
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- The Journal of Agricultural Science / Volume 146 / Issue 5 / October 2008
- Published online by Cambridge University Press:
- 22 July 2008, pp. 551-560
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Hard endosperm maize (Zea mays L.) is useful for industry and for human consumption. The objective of the present work was to study the inheritance of quality traits in hard endosperm maize. Three flint and three dent inbreds, F1 of their diallel crosses, F2s and backcrosses to each parent were evaluated for grain yield and quality traits (flotation test, flour-milling test, grain damage (GD) index and grain density). Genotypes and genotype×environment interactions were significant for most traits. A genetic model including additive, dominance and epistatic effects explained most of the genetic variation for the traits. Additive effect mean squares were larger than those due to dominance effects, except for grain yield and GD. Partition of the dominance variance into average, general, and specific dominance components revealed that the average dominance related to heterosis was the most important. Additive×additive epistatic variation was smaller than additive and dominance variation for quality traits. Some inbreds displayed sufficient potential to be used in hard endosperm maize breeding programmes. The average dominance effect was favourable for most of the quality and agronomic traits. Breeding programmes for improving quality in hard endosperm maize would be most efficient if both additive and dominant effects are capitalized on.