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101.
The species Tanysphyrus (Tanysphyroides) major Roelofs is recorded for the first time from Korea. This paper reports the diagnostic characters, and some remarks on its systematics and notes on its biology are also provided. 相似文献
102.
MICHAEL O'MAHONY HAENA PARK JAE YEON PARK KWANG-OK KIM 《Journal of sensory studies》2004,19(6):519-529
Consumers rated a set of toothbrushes and a set of potato chips on 9‐point and 21‐point hedonic scales under two experimental protocols: a traditional approach and rank‐rating. The hedonic data were analyzed in the usual way by using anova and multiple comparisons and also by ranking the data and using an R‐index analysis. The hypothesis that the latter analysis would elicit fewer significant differences was not confirmed. 相似文献
103.
ABSTRACT There is a pair of labial gland of hydropsychid caddisfly ( Hydropsyche kozhantschikovi Martynov) larva. It is in 'Z' formation in the body and the total length is about 20 mm. Hydropsychid caddishfly larvae that were raised under the lab conditions were able to form a nest-spining by connecting the small grains of sand provided. By repeatedly treating the extracted labial gland with methanol/D.W., the cell layer was removed. Accordingly, only the matrix within the labial gland that did not dissolve in water was obtained. The matrix inside the methanol/D.W. treated labial gland was dissolved with 5% acetic acid. Then the results of an acidic electrophoresis with a number of conditions indicated that 5% acetic acid/ 5 M urea/ 8% PAGE was the most effective. Moreover, the result of 2-D PAGE on the labial gland of these hydropsychid caddisfly larva, the number of proteins in the labial gland including the cell layer was about 350 and the number of proteins in the labial gland treated with methanol/D.W. was about 80, showing a substantially small number of proteins. 相似文献
104.
Three littoral Athetini species –Adota magnipennis (Bernhauer), Atheta ririkoae Sawada and Atheta tokiokai (Sawada) – are reported for the first time in Korea. Diagnoses, illustrations of the habitus and line drawings of diagnostic characters are provided. 相似文献
105.
106.
Three new species of Arrhopalites in the Symphypleona from Korea are described and illustrated. This work also records new occurrence of Arrhopalites habei Yosii, 1956, with brief remarks. A key to the identification of the Korean species of Arrhopalites is provided. 相似文献
107.
108.
Leaves of twelve C3 species and six C4 species were examined to understand better the relationship between mesophyll cell properties and the generally high photosynthetic rates of these plants. The CO2 diffusion conductance expressed per unit mesophyll cell surface area (gCO2cell) cell was determined using measurements of the net rate of CO2 uptake, water vapor conductance, and the ratio of mesophyll cell surface area to leaf surface area (Ames/A). Ames/A averaged 31 for the C3 species and 16 for the C4 species. For the C3 species gCO2cell ranged from 0.12 to 0.32 mm s-1, and for the C4 species it ranged from 0.55 to 1.5 mm s-1, exceeding a previously predicted maximum of 0.5 mm s-1. Although the C3 species Cammissonia claviformis did not have the highest gCO2cell, the combination of the highest Ames and highest stomatal conductance resulted in this species having the greatest maximum rate of CO2 uptake in low oxygen, 93 μmol m-2 s-1 (147 mg dm-2 h-1). The high gCO2cell of the C4 species Amaranthus retroflexus (1.5 mm s-1) was in part attributable to its thin cell wall (72 nm thick). 相似文献
109.
Ten novel microsatellite loci were isolated from giant scallop Mizuhopecten yessoensis, and the polymorphisms were examined to estimate genetic variability. The genetic variabilities varied depending on the locus. The number of alleles ranged from two to 17, and the observed and expected heterozygosities ranged from 0.17 to 0.99 and 0.33 to 0.90, respectively. Six loci showed significant Hardy–Weinberg disequilibrium. The high variabilities revealed in this study suggest that microsatellites should prove useful for various genetic investigations. 相似文献
110.
Responses of a CAM Plant to Drought and Rainfall: Capacitance and Osmotic Pressure Influences on Water Movement 总被引:5,自引:0,他引:5
Daily and seasonal patterns in water flow and water potentialwere investigated for the Crassulacean acid metabolism succulentAgave deserti during an extended summer drought and for a periodfollowing rainfall. Field measurements of transpiration andof osmotic pressure changes over selected 24 h periods wereused as input variables for a computer model of water flow thatwas based on an electrical circuit analog of the whole plant.Parameters such as root resistance and tissue capacitance werealso varied to reflect the effects of changing plant or soilwater status. The model predicted internal water flow and waterpotential during the drought cycle and was used to assess therole of tissue osmotic properties in water uptake from the soiland in internal water redistribution. For plants under wet soil conditions, 55% of the night-timetranspiration was derived from water storage, this storage beingrecharged during the day. As drought progressed, transpirationand the nocturnal increase in osmotic pressure declined, althoughthe osmotic pressure itself increased. The difference in osmoticpressure between the water storage tissue and the chlorenchymacaused a net flow of water into the chlorenchyma after 3 weeksof drought, thereby increasing chlorenchyma turgor pressure.Simulations also indicated that a large increase in root resistancemust occur to prevent substantial water loss from the plantto the dry soil. After rainfall, recharge of plant water storagewas complete within one week, although full recovery in theamplitude of daily osmotic pressure variations took longer. Key words: Agave deserti, transpiration, water potential, water storage 相似文献