Results 121 to 130 of about 1,262 (158)

Human salivary alpha-amylase reactivity in a psychosocial stress paradigm

International Journal of Psychophysiology, 2005
Biological indicators for stress reactions are valuable markers in psychophysiological research and clinical practice. Since the release of salivary enzyme alpha-amylase was reported to react to physiological and psychological stressors, we set out to investigate human salivary alpha-amylase changes employing a reliable laboratory stress protocol to ...
Ulrike Ehlert, Urs Nater, Jens Gaab
exaly   +5 more sources

Substrate differentiation of human pancreatic and salivary alpha-amylases

The American Journal of Digestive Diseases, 1970
To increase specificity in the clinical determination of amylase, the differential activities of human pancreatic and salivary amylases toward two different substrates—a Lintner soluble starch (LSS) and an insoluble, dyed starch, Amylose Azure (AA)—were investigated. A ratio of initial-velocity activities of Lintner soluble starch to Amylose Azure (LSS/
F F, Hall, C R, Ratliff, T, Hayakawa, T W, Culp, N C, Hightower   +4 more
openaire   +2 more sources

Salivary alpha amylase levels in youths with anxiety disorders

Psychiatry Research, 2016
It is suggested that salivary alpha-amylase (sAA) may be a marker of sympathoadrenal medullary system activity. Thus, it can be a possible relationship sAA and anxiety disorders. The aim of this study is to investigate sAA in children and adolescents with anxiety disorders and healthy controls.
Yorbik, Ozgur, Mutlu, Caner, Ozturk, Ozlem, Altinay, Derya Koc, Tanju, Ilhan Asya, Kurt, Ismail   +5 more
openaire   +2 more sources

Salivary Amylase. I. An Assay Method of Alpha-Amylase

Caries Research, 2009
A micromodification of Somogyi’s starch-iodine colour method for determination of α-amylase in media from salivary gland tissue cultures, as well as homogenates of such tissues and in saliva, is described. The method was based on photometric determination of the starch-iodine colour changes during enzymic degradation of starch substrate at wavelengths ...
N, Jacobsen, A, Hensten-Pettersen
openaire   +2 more sources

Stress affects salivary alpha-Amylase activity in bonobos

Physiology & Behavior, 2012
Salivary alpha-Amylase (sAA) is a starch digesting enzyme. In addition to its function in the context of nutrition, sAA has also turned out to be useful for monitoring sympathetic nervous system activity. Recent studies on humans have found a relationship between intra-individual changes in sAA activity and physical and psychological stress. In studies
Behringer, V., Deschner, T. ; https://orcid.org/0000-0002-9873-316X, Möstl, E., Selzer, D., Hohmann, G. ; https://orcid.org/0000-0002-4923-6095   +4 more
openaire   +4 more sources

Polymorphism of Salivary Esterase and α-Amylase in the Greek Population

Human Heredity, 1993
The genetic polymorphism of two salivary enzymes (esterase and alpha-amylase) was studied in individuals from eight districts of Greece. The pooled gene frequencies were: SetS = 0.63, SetF = 0.37, AMY1 = 0.87, AMY2 = 0.10, AMY3 = 0.02, and AMY4 = 0.01.
A, Petalopoulos, M, Fousteri, A, Kouvatsi, C, Triantaphyllidis   +3 more
openaire   +2 more sources

Salivary cortisol and alpha-amylase reactivity to taekwondo competition in children

European Journal of Applied Physiology, 2011
The aim of this study was to evaluate the effects of an official taekwondo competition (three 1-min rounds with a 1-min recovery in-between) on heart rate (HR), salivary alpha-amylase (sAA), and salivary-free cortisol (sC) in children. Parental consent was obtained for 12 young (10.4 ± 0.2 years) male taekwondo athletes. Saliva sample were collected 15
Capranica L., Lupo C., CORTIS, Cristina, Chiodo S., Cibelli G., Tessitore A.   +5 more
openaire   +2 more sources

Differentiation of human non-salivary, non-pancreatic alpha-amylase from salivary and pancreatic alpha-amylases by use of FG5P.

Journal of biochemistry, 1990
Human non-salivary, non-pancreatic alpha-amylase (yHXA) is the gene product of a newly found human alpha-amylase gene expressed in yeast. Its mode of action on a fluorogenic derivative of p-nitrophenyl alpha-maltopentaoside, FG5P (FG-G-G-G-G-P), was examined at various pH values to elucidate the difference between yHXA and pancreatic or salivary alpha ...
K, Omichi, K, Shiosaki, K, Matsubara, T, Ikenaka   +3 more
openaire   +2 more sources

Isoelectric variants of Macaca irus salivary alpha-amylase

Comparative Biochemistry and Physiology Part B: Comparative Biochemistry, 1973
Abstract 1. 1. Isoelectric fractionation (LKB 8101 and 8102 columns, ampholines pH 3–10 of alpha-amylase produced by cultures of paratoid and submandibular tissue from the Macca irus monkey showed up to four amylase fractions, irrespective of different purification steps. 2. 2.
openaire   +2 more sources

Cortisol, salivary alpha-amylase and children’s perceptions of their social networks

Social Neuroscience, 2015
In recent years there has been a growing interest in the use of social network analysis in biobehavioral research. Despite the well-established importance of social relationships in influencing human behavior and health, little is known about how children's perception of their immediate social relationships correlates with biological parameters of ...
Ponzi D., Muehlenbein M. P., Geary D. C., Flinn M. V.   +3 more
openaire   +4 more sources