the identification of different species of simuliidae, also called “black fly”, is based on particular structure of oral and terminal appendages of their larvae add also on the special morphology of adults and pupaes. because of their considerable flight range, the problem of finding their resting places, and also the difficulties of collecting the adult flies, breeding of this insect, in the l...

common drying systems, including hot air convection, infrared, vacuum and ir-convective were employed to investigate and analyze the drying process of mulberry fruits. to evaluate the effect of pretreatment on the drying phenomenon, samples were pretreated by being subjected to: microwaves, chemical preparation, mechanical as well as blanching approaches. results revealed that the microwave pre...

study of agronomic characteristics and advantage indices in intercropping of additive series of chickpea (cicer arietinum l.) and black cumin (nigella sativa l.) abstract in order to evaluate quantitive and qualitive yield of chickpea (cicer arietinum l.) and black cumin (nigella sativa l.) in intercropping of additive series, a field experiment was arranged in a randomized complete block desig...

Metameric organization of the dorsal root ganglia (DRG) and ventral roots depends on the alternation of rostrocaudal properties within the somites. In addition, the size of DRG is likely to be regulated by the adjacent mesoderm, because unilateral creation of a paraxial mesoderm with only rostral somitic (RS) halves, leads to the development of non-segmented DRG that are larger and contain more...

Poroqueratosis (PQ) refers to a group of disorders of keratinization with the common histological feature of the presence of cornoid lamellae, narrow columns of parakeratosis on a focally disorganized epidermis.1 We present 2 patients with lesions compatible with linear PQ, with extensive involvement of one side of the body. The first patient was a 23-year-old man with no past history of intere...

BACKGROUND In the trunk of avian embryos, neural crest migration through the somites is segmental, with neural crest cells entering the rostral half of each somitic sclerotome but avoiding the caudal half. Little is known about the molecular nature of the cues-intrinsic to the somites-that are responsible for this segmental migration of neural crest cells. RESULTS We demonstrate that Eph-rela...

For the comparative embryologists of the early 20th century, the segment-like bulges that appear transiently during the early stages of vertebrate hindbrain development were both the object of fascination and the subject of vigorous dispute. Conflicting views were held as to the significance of these 'rhombomeres' to brain development and their more general relevance to head evolution. Whether ...

The fushi tarazu (ftz) gene of Drosophila acts early in embryogenesis to regulate body segmentation. The localization of the ftz protein product in embryos was examined using indirect immunofluorescence microscopy. Antibodies were prepared against a beta-galactosidase-ftz hybrid protein made in E. coli. The ftz protein was first detectable in blastoderm-stage embryos as seven stripes of nuclei ...