| an a-type proanthocyanidin from prunus armeniaca. | roots of prunus armeniaca yielded a new a-type proanthocyanidin whose structure was assigned as ent-epiafzelechin-3-o-p-hydroxybenzoate-(4alpha-->8, 2alpha-->o-->7)-epiafzelechin (1). the structure of 1 was determined through extensive 1d and 2d nmr studies. | 1998 | 9748379 |
| application of two-dimensional gel electrophoresis to prunus armeniaca leaf and bark tissues. | the protein composition of prunus armeniaca bark and leaf tissues was investigated by two-dimensional gel electrophoresis. three different extraction procedures were tested in order to obtain reproducible gels with numerous spots of high intensity. the best results were achieved with extraction in tris-buffer in the presence of a nonionic detergent, reducing agents, and polyphenol oxidase inhibitors. as many as 744 protein spots were resolved from leaf tissues. the patterns exhibited well-focuse ... | 1997 | 9059840 |
| [microwave processing method of semen armeniacae amarum]. | this paper reports the microwave processing method of semen armeniacae amarum (prunus armeniaca var. ansu). the experimental results showed that amygdalase was completely inactivated and the contents of amygdaloside were not reduced at all. the time and temperature of the processing method have also been studied. | 1991 | 1909138 |
| purification and properties of a proline iminopeptidase from apricot seeds. | a proline iminopeptidase was purified about 18,000-fold from apricot seeds (prunus armeniaca linn.) by a five-step procedure comprised of extraction from seeds, ammonium sulfate fractionation, deae-cellulose chromatography, cm-sepharose chromatography, and rechromatography on cm-sepharose. the purified enzyme had a molecular weight of 220,000 by gel filtration and 55,000 by sodium dodecyl sulfate-polyacrylamide gel electrophoresis. this indicates that the native enzyme may be composed of four id ... | 1982 | 7130149 |
| development of a photosynthesis model with an emphasis on ecological applications : v. test of the applicability of a steady-state model to description of net photosynthesis of prunus armeniaca under field conditions. | a physiologically based steady-state model of whole leaf photosynthesis (wholephot) is used to describe net photosynthesis daily time courses in prunus armeniaca. net photosynthesis rates are calculated in response to incident light intensity, leaf temperature, air carbon dioxide concentration, and leaf diffusion resistance measured at five minute intervals. the steady-state calculations closely approximate the observed net photosynthesis rates for a broad range of weather conditions and leaf st ... | 1980 | 28309523 |
| long-term effects of drought on wild and cultivated plants in the negev desert : ii. diurnal patterns of net photosynthesis and daily carbon gain. | the seasonal change in diurnal patterns of net photosynthesis and daily carbon gain is studied in relation to the plant water status of the irrigated and non-irrigated naturally growing desert species hammada scoparia, zygophyllum dumosum, artemisia herba-alba and reaumuria negevensis. comparison is made to cultivated prunus armeniaca. under non-irrigated natural conditions hammada scoparia, a c4 plant, showed one-peaked flat diurnal courses of co2 uptake which changed into a pattern of a high m ... | 1980 | 28310931 |
| the temperature-related photosynthetic capacity of plants under desert conditions : iii. ecological significance of the seasonal changes of the photosynthetic response to temperature. | as described earlier, the native arido-active perennial hammada scoparia and the cultivated prunus armeniaca exhibit characteristic seasonal shifts of their temperature optimum of net photosynthesis (op) under desert conditions in the negev. in the present paper the op values were compared with the actual tissue temperatures of the experimental plants.during the growing period from march to september the duration of optimal temperatures for net photosynthesis (op±3°c) experienced by the plants w ... | 1978 | 28309390 |
| the role of air humidity and temperature in controlling stomatal resistance of prunus armeniaca l. under desert conditions : iii. the effect on water use efficiency. | measurements of co2 and water vapor exchange were performed on prunus armeniaca l. with humidity- and temperature-controlled chambers under the climatic conditions of a desert habitat. in apricot, the stomatal response to changes in temperature and water-vapor concentration difference between leaf and air (wd) significantly determined the rates of gas exchange during the day (parts i and ii). the effect of climate-controlled stomatal response on the transpiration/net photosynthesis (t/p)-ratio w ... | 1975 | 28309242 |
| the role of air humidity and leaf temperature in controlling stomatal resistance of prunus armeniaca l. under desert conditions : ii. the significance of leaf water status and internal carbon dioxide concentration. | the gas exchange of the apricot (prunus armeniaca l.) growing in the runoff farm at avdat (negev, israel) was measured during its growing period using temperature- and humidity-controlled chambers. water potentials of the xylem were measured with a pressure bomb, and the mesophyll internal co2 concentration was calculated from simultaneous measurements of net photosynthesis and transpiration.the daily changes in water potential ψ had only little effect on the daily course of stomatal resistance. ... | 1975 | 28308679 |
| the temperature-related photosynthetic capacity of plants under desert conditions : ii. possible controlling mechanisms for the seasonal changes of the photosynthetic response to temperature. | in a previous paper seasonal shifts of the temperature optimum (op) and of the upper temperature compensation point (cp) of net photosynthesis were described for hammada scoparia growing wild, and for prunus armeniaca cultivated in the negev desert (israel). in this paper the relationships between these shifts and the microclimatic conditions, plant-water relations, and plant development are studied.the energy budged of the thin, round photosynthesizing stems of h. scoparia growing in an open de ... | 1975 | 28308814 |
| the role of air humidity and leaf temperature in controlling stomatal resistance of prunus armeniaca l. under desert conditions : i. a simulation of the daily course of stomatal resistance. | experiments with prunus armeniaca were carried out under conditions of constant temperature but varying air humidity. experiments were also contucted with a constant water vapor difference between the evaporating sites in a leaf and the air, but with varying leaf temperature. these served as a basis for predicting the daily course of total diffusion resistance under the natural climatic conditions of a desert. for the simulation, the rsults of the experiments at constant conditions with only one ... | 1974 | 28309023 |
| the temperature-related photosynthetic capacity of plants under desert conditions : i. seasonal changes of the photosynthetic response to temperature. | temperature dependence of net photosynthesis under conditions of light saturation and maximum air humidity was measured throughout the season in the central negev desert (israel). experimental plants were the wild growing hammada scoparia and prunus armeniaca cultivated in the runoff farm of avdat.the optimum temperature for net photosynthesis and the upper temperature compensation point of co2 exchange showed a characteristic seasonal variation with low values in spring and fall and high values ... | 1974 | 28309018 |
| cation penetration through isolated leaf cuticles. | the rates of penetration of various cations through isolated apricot prunus armeniaca l. leaf cuticles were determined. steady state rates were measured by using a specially constructed flow-through diffusion cell. the penetration rates of the monovalent cations in group ia followed a normal lyotropic series, i.e., cs(+) >/= rb(+) > k(+) > na(+) > li(+). the divalent cations all penetrated through the cuticle more slowly than the monovalent cations. comparison of the relative values of k (permea ... | 1974 | 16658777 |
| stomatal responses to changes in temperature at increasing water stress. | the response of stomata to a gradual increase in temperature at increasing plant water stress was studied in a hot desert habitat (negev, israel) in the field, but under controlled temperature and humidity conditions. four native species (zygophyllum dumosum, artemisia herba-alba, hammada scoparia, reaumuria negevensis) and one cultivated plant (prunus armeniaca) were used in these studies. the stomatal response to temperature was compared with the response in well-irrigated plants of the same s ... | 1973 | 24474309 |
| stomatal responses to changes in humidity in plants growing in the desert. | the stomata of plants growing in the negev desert, namely the stomata of the mesomorphic leaves of prunus armeniaca, the xeromorphic stems of hammada scoparia, and the succulent leaves of zygophyllum dumosum, respond to changes in air humidity. under dry air conditions diffusion resistance increases. under moist air conditions diffusion resistance decreases. when the stomata close at low air humidity the water content of the apricot leaves increases. the stomata open at high air humidity in spit ... | 1972 | 24473858 |
| effects of dehydration processes on flavour compounds and histology of apricots (prunus armeniaca). | | 1966 | 5913166 |
| isolation and identification of quercetin and isoquercitrin from apricots, prunus armeniaca. | | 1953 | 13051182 |