Search results for "Orella"

The Variability of the Photosynthetic Unit in Chlorella Fusca

1984

The concept of the photosynthetic unit (PSIT) was introduced by Gaffron and Wohl (1936) on the basis of Emerson and Arnold’s flash light experiments (1932). The PSU was defined as the minimum of chlorophyll molecules required for the evolution of one O2. Later on, the PSU was considered to be the complex of one reaction center and its appropriate antenna of light harvesting chlorophyll molecules. Assuming that there is an equal number of the PS I and PS II reaction centers the PSU was mostly expressed as Chl/P-700. However, recently it could be shown that the ratio of PS II/PS I is variable depending on the light conditions during growth (Kawamura et al., 1979; Myers, Graham, 1982). Further…

The concentration of Cytochrome f and P700 in chlorophyll-deficient mutants of Chlorella fusca

1977

The ratio of Chlorophyll: Cytochrome f and of Chlorophyll: P700 (reaction center pigment in photosystem I) is essentially lower in chlorophyll-deficient mutants than in the normal green strain. On a dry weight basis, the mutants have the same or a higher content of redox enzymes than the normal form. The size of the photosynthetic unit of the mutants is 4 to 7 times smaller than that of the normal strains, due mainly to a deficiency of the light-harvesting chlorophyll-protein complex.

Memorial en que representa al Rey Nuestro Señor la antiguedad, calidad, y servicios de sus casas, Don Diego de Benavides y de la Cueva ... y iuntamen…

1660

Sign.: [A]-Z2, Aa-Ff2 Errates tip. a la fol.

Gozos en alabanza de nuestra Señora de Vallivana

1750

El full orlat Grav. xil. enmarcat de la Mare de Déu, flanquejat per gerros amb flors El text del goig a tres col. separades per filets

The importance of a highly active and DeltapH-regulated diatoxanthin epoxidase for the regulation of the PS II antenna function in diadinoxanthin cyc…

2005

The present study focuses on the regulation of diatoxanthin (Dtx) epoxidation in the diadinoxanthin (Ddx) cycle containing algae Phaeodactylum tricornutum, Thalassiosira pseudonana, Cyclotella meneghiniana and Prymnesium parvum and its significance for the control of the photosystem II (PS II) antenna function. Our data show that Dtx epoxidase can exhibit extremely high activities when algal cells are transferred from high light (HL) to low light (LL). Under HL conditions, Dtx epoxidation is strongly inhibited by the light-driven proton gradient. Uncoupling of the cells during HL illumination restores the high epoxidation rates observed during LL. In Ddx cycle containing algae, non-photoche…

Unveiling microbial structures during raw microalgae digestion and co-digestion with primary sludge to produce biogas using semi-continuous AnMBR sys…

2020

[EN] Methane production from microalgae can be enhanced through anaerobic co-digestion with carbon-rich substrates and thus mitigate the inhibition risk associated with its low C:N ratio. Acclimated microbial communities for microalgae disruption can be used as a source of natural enzymes in bioenergy production. However, co-substrates with a certain microbial diversity such as primary sludge might shift the microbial structure. Substrates were generated in a Water Resource Recovery Facility (WRRF) and combined as follows: Scenedesmus or Chlorella digestion and microalgae co-digestion with primary sludge. The study was performed using two lab-scale Anaerobic Membrane Bioreactors (AnMBR). Du…

Maximising resource recovery from wastewater grown microalgae and primary sludge in an anaerobic membrane co-digestion pilot plant coupled to a compo…

2021

[EN] A pilot-scale microalgae (Chlorella spp.) and primary sludge anaerobic co-digestion (ACoD) plant was run for one year in an anaerobic membrane bioreactor (AnMBR) at 35 °C, 70 d solids retention time and 30 d hydraulic retention time, showing high stability in terms of pH and VFA concentration. The plant achieved a high degree of microalgae and primary sludge substrate degradation, resulting in a methane yield of 370 mLCH4·gVSinf¿1. Nutrient-rich effluent streams (685 mgN·L¿1 and 145 mgP·L¿1 in digestate and 395 mgNH4-N·L¿1 and 37 mgPO4-P·L¿1 in permeate) were obtained, allowing posterior nutrient recovery. Ammonium was recovered from the permeate as ammonia sulphate through a hydrophob…

2001

Eight strains of Taylorella equigenitalis were identified by a polymerase chain reaction using a primer pair specific to the 16S rDNA of T. equigenitalis. These eight strains were chosen because they had previously been shown to represent eight distinct genotypes by pulsed-field gel electrophoresis analysis after separate digestion of the genomic DNA with ApaI or NotI. The eight strains could be classified into six or seven types by random amplified polymorphic DNA analysis using different kinds of primers. Amplified rDNA restriction analysis after separate digestion with five restriction enzymes, including AluI and MboI, of the 1500 bp fragments of rDNA amplified by polymerase chain reacti…

Joan Roís de Corella, la seua vida i el seu entorn: noves dades per a la història de la cultura en la València del segle xv

2014

This article offers a full updating of the biographical records of the writer Joan Roís de Corella (1435-1497) and his family: his great-grandparents, grandparents, parents, siblings and children. All data are presented in a systematic way, generation by generation, and a new vision of the writer himself is offered. In its documentary section, 432 documents are transcribed or summarised, dating from 1373 to 1516. A broad range of new archival data is presented; other previously known data are corrected or improved. Some examples: Joan Roís de Corella had four children: Magdalena (born 1459), Maria, Joan and Estefania, the latter two by Isabel Martínez de Vera. Joan Roís de Corella was widel…

Joan Roís de Corella, Lamentació de Mirra, de Narciso, de Píramus i Tisbe: edizione critica

2016

Il contributo, che è un’anticipazione parziale dell’edizione critica integrale delle narrazioni mitologiche di Joan Roís de Corella (XV sec.) per Barcino (ENC), nasce dall’esigenza di rivedere la situazione testuale della faula in oggetto (Lamentació de Mirra, de Narciso, de Píramus i Tisbe) e di avanzare, dove necessario, nuove proposte di lettura. Esso consta di due parti, delle quali la prima contiene l’Introduzione, la seconda il Testo con note a piè di pagina, in cui si discutono questioni relative alla constitutio textus, l’Apparato e l’Apparato complementare. Nell’Introduzione si danno informazioni essenziali circa la tradizione manoscritta delle Lamentacions (altrimenti note come Lo…