101 research outputs found
REACTIVITY OF CHLOROPHYLL a/b-PROTEINS AND MICELLAR TRITON X-100 COMPLEXES OF CHLOROPHYLLS a OR b WITH BOROHYDRIDE
The reaction of several plant chlorophyll-protein complexes with NaBH4 has been studied by absorption spectroscopy. In all the complexes studied, chlorophyll b is more reactive than Chi a, due to preferential reaction of its formyl substituent at C-7. The complexes also show large variations in reactivity towards NaBH4 and the order of reactivity is: LHCI > PSII complex > LHCII > PSI > P700 (investigated as a component of PSI). Differential pools of the same type of chlorophyll have been observed in several complexes.
Parallel work was undertaken on the reactivity of micellar complexes of chlorophyll a and of chlorophyll b with NaBH4 to study the effect of aggregation state on this reactivity. In these complexes, both chlorophyll a and b show large variations in reactivity in the order monomer > oligomer > polymer with chlorophyll b generally being more reactive than chlorophyll a. It is concluded that aggregation decreases the reactivity of chlorophylls towards NaBH4 in vitro, and may similarly decrease reactivity in naturally-occurring chlorophyll-protein complexes
THE EFFECT OF MONOCHROMATIC LIGHT ON TRANS-HEXADECENOIC ACID and CHLOROPHYLL ACCUMULATION IN ETIOLATED LEAVES OF VIGNA SINENSIS L.*
The reconstitution of photophosphorylation and the effect of inorganic phosphate at different pH's on the phenazine methosulfate photoinhibition of Rhodospirillum rubrum chromatophores
Assertive outreach teams in London: Staff experiences and perceptions - Pan-London Assertive Outreach Study, Part 2
Recent Trends in Multilateral Development Bank Lending to the Private Sector in Developing Countries: Policy and Practice
Freeze-fracture analysis of membrane appression and protein segregation in model membranes containing the chlorophyll-protein complexes from chloroplasts
'I was just the boy around the place': what made apprenticeships successful?
his article seeks to add to current policy and debate on apprenticeships and youth transitions more widely by reflecting back upon the historical experience of the apprenticeship model. The research comprises inâdepth interviews with 30 people who undertook apprenticeships in a range of trades in Great Britain in the period 1944â1982. The discussion focuses upon the socialisation aspects of apprenticeship and concludes that a key feature of good apprenticeships in the postâ war period was that they offered a sheltered and extended period in which the young person was able to grow up and become jobâready. Reconstructing the social, industrial, familial and community conditions that made this possible is very difficult in the contemporary period, although further work in oral history has considerable potential
- âŠ