The Asian citrus psyllid (ACP), Diaphorina citri Kuwayama, is one of the most serious citrus pests worldwide due to its role as vector of huanglongbing or citrus greening disease. While some optimal plant species for ACP oviposition and development have been identified, little is known of the influence of host plants on ACP size and shape. Our goal was to determine how size and shape of ACP win...

Pseudoperonospora cubensis, the causal agent of cucurbit downy mildew (CDM), is known to exhibit host specialization. The virulence of different isolates of the pathogen can be classified into pathotypes based on their compatibility with a differential set composed of specific cucurbit host types. However, the genetic basis of host specialization within P. cubensis is not yet known. Total genom...

a r t i c l e i n f o The bees of the Peponapis genus (Eucerini, Apidae) have a Neotropical distribution with the center of species diversity located in Mexico and are specialized in Cucurbita plants, which have many species of economic importance, such as squashes and pumpkins. Peponapis fervens is the only species of the genus known from southern South America. The Cucurbita species occurring...

Apoproteins of cytochrome c peroxidase, horseradish peroxidase, and sperm whale myoglobin were recombined with manganese complexes of proto-, hemato-, meso-, and deuteroporphyrins to form manganese porphyrin-protein complexes. These complexes were purified by column chromatography. All the manganese porphyrin-containing cytochrome c peroxidases were crystallized. Light absorption maxima of mang...

The hue discrimination curve (HDC) that characterizes performances over the entire hue circle was determined by using sinusoidally modulated spectral power distributions of 1.5 c/300 nm with fixed amplitude and twelve reference phases. To investigate relationship between hue discrimination and appearance, observers further performed a free color naming and unique hue tasks. The HDC consistently...

We present a Poisson approximation with applications to extreme value theory. Let X1; X2; : : : be i.i.d. and let M (1) n ¿M (2) n ¿ · · ·¿M ( j) n be the j largest order statistics. Then the asymptotic behavior of the vector (M (1) n ; : : : ; M ( j) n ) is the same as that of (M (1) N ; : : : ; M ( j) N ) where N is a random variable which is independent of X1; X2; : : : and has a Poisson dis...

Differential spectrometry revealed two species for the b-type, as well as for the c-type, cytochromes in mitochondria from Agaricus bisporus Lge. The two b-type components are denoted according to their peak position in the alpha region at room temperature, i.e. b(560) and b(566). The b(556) component present in all the studied higher plant mitochondria was not detected in the system. At 293 K,...

1. Seeing-frequency functions (psi[S]) determined uniocularly for small (1.6'), brief images at the thoroughly dark-adapted human central fovea take the form of log-Gaussian integrals, for intensity or for exposure-time as the independent variable. They cannot be of Poisson type, since mean (tau') and standard deviation (sigma) are quite independently modifiable. 2. The properties of tau', the ...

This work first showed that very high amounts of phycocyanins, such as 11.3 mg/mL C-phycocyanin (C-PC), 3.1 mg/mL allophycocyanin (APC), and 0.8 mg/mL phycoerythrin (PE), can be obtained using an ultrasonic extraction process (UE) with a 60 kHz frequency and 3 h of process time at 25 °C, without any other pretreatments. These yields were higher than those from most conventional water extraction...