Taxonomic results of the Bryotrop expedition to Zaire and Rwanda : 32., Bryaceae

16 species of Bryaceae collected during the Bryotrop expedition to Rwanda and Zaire were examined resulting in 7 new records for Central Africa

Contributions toward a bryoflora of the Aberdare Range, Kenya

124 species of bryophytes, belonging to 46 families are reported for the Aberdare Mountains, of which 58 species are new for the Aberdares and 6 records are new for Kenya, indicated by * and ** respectively. The wetter, more humid southern and south-eastern parts of the range contain the greatest diversity of species, particularly in the montane forests while the drier northern part is poor in species

Contribution to the bryoflora of Kenya

109 species of bryophytes are presented from various localities in Kenya, among which are thirteen new records (marked with **) for the country

Data to the bryoflora of Mount Kenya, Kenya

194 species of bryophytes, belonging to 61 families are reported from Mount Kenya, of which 38 species are new for Mount Kenya and 30 records are new for the whole country, marked by * and ** respectively. The montane forests between 1600 and 3300m. asl., contain the greatest diversity of life forms and species. This is due to the abundant rainfall providing adequate humidity at relatively low temperature and altitude, coupled with frequent cloud cover. All vegetation belts above the montane forests experience large diurnal fluctuations in temperatures, intense solar radiation, added by the fact that the rainfall is relatively low and erratic or at times fall in the form of hail or snow resulting in a low diversity of species and life forms except in very sheltered habitats such as rock crevices in rocky outcrops. Solifluctions soil conditions occuring between 3850 and 4450m. asl. exhibit moss balls growth forms. The summits of Batian (5199m.), Nelion (5188m.) and Lenana (4985m.) harbour small cushions of Grimmia affinis and Andreaea cucullata. The greatest number of species are found in the wetter southern, south-western and south-eastern slopes unlike the drier northern, north-western and north-eastern slopes of the mountain. Species commonly found in the wetter areas are Bryum preussii, Bryum keniae, Prionodon ciliatus, Hypopterygium viridissimum, Plagiochila barteri, Plagiochila squamulosa, Radula recurvifolia, Porella hoehnelii, Dumortiera hirsuta while Pterogonium gracile, Leptodon smithii and Hedwigia ciliata are characteristic of the drier areas

Bryophytes from Saiwa Swamp National Park, Kenya

57 species of bryophytes belonging to 30 families are reported from Saiwa Swamp National Park, of which 57 species are new for Saiwa Swamp National Park and 10 records are new for Kenya, indicated by * and ** respectively. Although small in surface area (15.5 sq.km.) the park represents an undercollected area in Kenya with a good diversity of bryophytes

A preliminary checklist of the bryoflora of the Taita Hills, Kenya

A checklist of the bryoflora of the Taita Hills (Kenya) containing 168 taxa in 40 families is presented. Whilst previously only 22 mosses and 39 liverworts were recorded for the area, this study extended our knowledge to 85 and 83 respectively. Twenty taxa are newly recorded for Kenya

Mechanism of paraquat resistance in crassocephalum crepidioides (Benth.) S. moore during immature stage

The mechanism of paraquat resistance in Crassocephalum crepidioides at the six-leaf stage was investigated. The extractable paraquat was not metabolized fly the leaf tissue in the resistant (R) and susceptible (S) biotypes. Therefore, differential metabolism does not appear to play a role in the mechanism of resistance. The S biotype absorbed 44% more 14Gparaquat than the R biotype. However, more than 98% of the absorbed 14G paraquat remained on the treated leaf of both biotypes. The difference in absorption had a negative correlation with the amount of epicuticular wax as well as the cuticle of leaf surfaces in both biotypes. The results of this study suggest that differential absorption may be a factor that accounts for resistance to paraquat at the six-leaf stage

The contribution of perceived firm marketing innovation initiatives to customer perceived value and loyalty: does switching experience really matter?

In recent years, perceived firm marketing innovation initiatives (PFMII) are increasingly considered as an important means to ensure customers' continued loyalty. Although customer perceived value is believed to be a potential mediator between PFMII and customer loyalty, much of the evidence to date remains anecdotal or speculative. Furthermore, there is a dearth of knowledge about how the effect of PFMII on customer value differs between switchers and non-switchers. To bridge this knowledge gap, we propose a conceptual framework linking PFMII to customer perceived value and loyalty, and develop hypotheses about the moderating role of switching experience in some of these linkages. Data were collected from Generation Y(18–34 years old) who subscribed to post-paid mobile internet plans. The results showed that both functional and monetary values mediated the relationship between PFMII and customer loyalty. However, there was no significant difference in the effect of PFMII on functional and monetary values between switchers and non-switchers. This research contributes to theory and practice by clarifying linkages between PFMII and customer loyalty by investigating the often widely neglected role of customer perceived value. In addition, this study successfully extended Sweeney and Soutar (2001) PERVAL model by incorporating PFMII as the key driver of customer perceived value

Red Emission Of Thin Film Electroluminescent Device Based On p-GaN.

High quality GaN layers doped with Mg were grown on Si(111) substrates using high temperature AlN as buffer layer by using radio-frequency molecular beam epitaxy (RF-MBE)

Optical Characterization Of GaN Thin Film Grown On Si(111) By Radio-Frequency Plasma-Assisted Molecular Beam Epitaxy.

The wide band gap gallium nitride (GaN) based semiconductor system has great potential for applications in high-power, high-frequency, and hightemperature optoelectronic devices due to its superior properties, such as large breakdown field, high electron mobility, and thermal stability at elevated temperature