Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 4 de 4
Filter
Add more filters










Publication year range
1.
Arq. bras. med. vet. zootec. (Online) ; 72(6): 2059-2068, Nov.-Dec. 2020. tab, graf
Article in Portuguese | LILACS, VETINDEX | ID: biblio-1142288

ABSTRACT

O objetivo deste estudo foi investigar a interferência do teor de gordura do leite no ponto de congelamento (PC) obtido pelo infravermelho com transformada de Fourier (FTIR). Uma fração de leite cru foi desnatada, obtendo-se creme e leite desnatado. O leite integral e o desnatado foram adicionados com água (0%, 2%, 5%, 10%, 15% e 20%). O leite desnatado remanescente foi adicionado com creme (5%, 10%, 15%, 20%) e água (0%, 2%, 5%, 10%, 15% e 20%). As amostras foram analisadas para PC (crioscópio eletrônico e FTIR) e composição (FTIR). O PC medido por FTIR foi altamente correlacionado com o método do crioscópio eletrônico (acima de 98,5%) e, como esperado, a adição de água foi significativa (P≤0,001) ao aumentar o PC do leite em ambos os métodos. No entanto, o alto teor de gordura no leite cru resultou na redução do PC ao se utilizar o FTIR, enquanto o baixo teor de gordura resultou em aumento do PC (P≤0,001). Uma vez que a adição de água causou o efeito inverso do alto teor de gordura no PC medido por FTIR, é importante considerar o teor de gordura do leite para evitar interpretações erradas do PC quando se utiliza o método FTIR.(AU)


The objective of this study was to investigate the interference of milk fat content upon the Freezing Point (FP) obtained by Fourier-transform infrared (FTIR). A fraction of raw milk was skimmed, obtaining cream and skim milk. Whole and skim milk were added with water (0, 2, 5, 10, 15, and 20%). The remaining skim milk was added with cream (5, 10, 15, 20%) and water (0, 2, 5, 10, 15, and 20%). Samples were analyzed for FP (thermistor cryoscope and FTIR) and composition (FTIR). FP measured by FTIR was highly correlated with the thermistor cryoscope method (above 98.5%) and, as expected, water addition was significant (P≤0.001) upon increasing milk FP in both methods. However, high fat content in raw milk resulted in decreasing FP when using FTIR, while low fat content resulted in increased FP (P≤0.001). Since water addition caused the inverse effect of high fat on FP measured by FTIR, it is important to regard the fat content of milk to avoid misinterpretation of FP when using the FTIR method.(AU)


Subject(s)
Milk/chemistry , Food Storage/methods , Raw Foods/analysis , Frozen Foods/analysis , Spectroscopy, Fourier Transform Infrared/methods
2.
Arch Clin Neuropsychol ; 33(4): 491-501, 2018 Jun 01.
Article in English | MEDLINE | ID: mdl-28961928

ABSTRACT

OBJECTIVE: This study aimed to examine the accuracy in identifying facial expressions and the perceived intensity of emotions of happiness, sadness, disgust, anger, fear, surprise in bipolar disorder (BD), and major depressive disorder (MDD). METHOD: Ninety-three adult participants (n = 30 BD, 80% female; n = 18 MDD, 72.2% female; n = 45 C, 46.7% female) completed a facial expression task. Stimuli in the task were first presented for 200 ms, followed by 500 ms, and 1000 ms. Participants were asked to identify the emotion expressed by each face and judge its intensity on a Likert scale. Accuracy and perceived intensity of expressions corresponding to each emotion were compared between groups using a repeated measures ANCOVA, with length of stimulus presentation as a within-subjects variable. RESULTS: Expressions of sadness were rated more intensely by patients with BD, and expressions of anger by those with MDD, than control participants. Subjects with BD were less accurate than control participants in identifying expressions of disgust. An interaction effect was also identified for the detection of sadness, whereby patients with BD were significantly less accurate when expressions were shown for 200 ms. CONCLUSIONS: The increased intensity with which emotions were perceived by patients with BD and MDD has important repercussions for patient functioning and clinical practice. A tendency to overestimate the intensity of certain facial expressions in mood disorders may lead patients to interpret social cues erroneously and engage in dysfunctional behaviors and cognitive patterns. Future studies should focus on this variable in addition to the accuracy of emotion identification.


Subject(s)
Bipolar Disorder/psychology , Depressive Disorder, Major/psychology , Emotions , Facial Expression , Perception , Adult , Female , Humans , Male , Neuropsychological Tests
3.
Interação psicol ; 18(3): 309-317, set.-dez. 2014. graf, tab
Article in Portuguese | Index Psychology - journals | ID: psi-67863

ABSTRACT

Este estudo avaliou as associações e dissociações encontradas entre déficits de memória episódica em relação aos de funções executivas e verificou se estes déficits encontrados eram primários ou secundários. Os 81 pacientes pós-Traumatismo Cranioencefálico (TCE) foram avaliados por meio do Teste de Aprendizagem Auditivo-Verbal de Rey e do Teste Hayling. Os resultados sugerem que prejuízo na velocidade de controle inibitório pode contribuir para déficit na memória episódica e que as velocidades de iniciação e inibição parecem ser complementares, mas a primeira precede a segunda. Nossos achados ressaltam que os prejuízos executivos provavelmente sejam primários em nossa amostra de pacientes pós-TCE e que estes prejuízos podem causar déficits na memória episódica (AU)


Subject(s)
Humans , Male , Female , Adult , Craniocerebral Trauma/psychology , Memory
4.
Interaçao psicol ; 18(3): 309-317, set.-dez.2014. graf, tab
Article in Portuguese | LILACS | ID: lil-790895

ABSTRACT

Este estudo avaliou as associações e dissociações encontradas entre déficits de memória episódica em relação aos de funções executivas e verificou se estes déficits encontrados eram primários ou secundários. Os 81 pacientes pós-Traumatismo Cranioencefálico (TCE) foram avaliados por meio do Teste de Aprendizagem Auditivo-Verbal de Rey e do Teste Hayling. Os resultados sugerem que prejuízo na velocidade de controle inibitório pode contribuir para déficit na memória episódica e que as velocidades de iniciação e inibição parecem ser complementares, mas a primeira precede a segunda. Nossos achados ressaltam que os prejuízos executivos provavelmente sejam primários em nossa amostra de pacientes pós-TCE e que estes prejuízos podem causar déficits na memória episódica


The present study evaluated the presence of associations and dissociations between impairments in episodic memory and executive functions in patients with traumatic brain injury (TBI), and verified whether these deficits were primary or secondary. Eighty-one patients with TBI were assessed using the Rey Auditory Verbal Learning Test and the Hayling Test. The results suggest that impairments in inhibition speed may contribute to deficits in episodic memory, and that initiation and inhibition abilities may be complementary and the first precedes the second. Our findings highlighted that primary executive impairment following TBI may lead to episodic memory deficits


Subject(s)
Humans , Male , Female , Adult , Memory , Craniocerebral Trauma/psychology
SELECTION OF CITATIONS
SEARCH DETAIL
...