The propagation properties of duobinary encoded optical signals are investigated. Three variations of duobinary encoding are presented: AM-PSK, alternating-phase, and blocked-phase. A computational model for optical transmission of duobinary signals is developed, which gives insight into the issue of optimal filtering in duobinary transmission systems. The main result is that the baseband elect...

Responses of leaf growth and leaf water relations to seasonal drought were monitored during two successive years in three cultivars (Galhosa, Espargal and Mulata) of Ceratonia siliqua L. growing in the field in southern Portugal. Leaf water relations of fully expanded leaves were characterized by pressureâ volume analysis, and morphometric measurements of petiolar xylem were made. The three cu...

Interaction of the the rust fungus Puccinia miscanthi with the biofuel plant Miscanthus sinensis during the teliospore phase was investigated by light and electron microscopy. P. miscanthi telia were oval-shaped and present on both the adaxial and abaxial leaf surfaces. Teliospores were brown, one-septate (two-celled), and had pedicels attached to one end. Transmission electron microscopy revea...

Pecan bacterial leaf scorch (PBLS) and the pathogen Xylella fastidiosa were identified in 20 pecan cultivars observed in Louisiana commercial orchards over a twoyear period. The disease occurred in the majority of orchards observed and was distributed throughout the pecan growing areas of the state. Leaf scorch was most prevalent in the Cape Fear cultivar. A few other cultivars sometimes exhibi...

BACKGROUND Banana leaf is used in many centers in India during the care of patients with toxic epidermal necrolysis (TEN) and other extensive blistering disorders. Sepsis is an important cause of death in TEN patients and use of banana leaf may be a source of such infection. AIMS We conducted this study to detect the bacterial flora of the banana leaf and to examine various methods of renderi...

Plants play a vital role in our daily life. Plants are a great source of medicine for many diseases. Due to their fewer chances of side effects on human body and also better compatibility with humans, using plant for treating diseases is considered to be safer. Other items like paper, bio-diesel are also obtained by using plant material. Hence identification of plants is a very important task h...