Willem A Brandenburg

• senior scientist agrosystems research at Wageningen University & Research

Dit onderzoek richt zich op het potentieel van zeewier productie in de Noordzee, als een duurzaam uitgangsmateriaal voor productie in diervoeders en andere non-food toepassingen. Zeewier kan geteeld worden in zogenaamde multi-use platforms at sea (MUPS). Het onderzoek geeft een overzicht van kennis over zeewier productie en toepassingen. Resultaten...

In the so-called milking process of Dunaliella salina carotenoids are extracted and simultaneously produced by the culture, whilst the biomass concentration remains constant. Different theories exist about the extraction mechanisms although none have been proven yet. In this research, direct contact between dodecane and cells during the extraction...

In this study the efficacy of using marine macroalgae as a source for polyunsaturated fatty acids, which are associated with the prevention of inflammation, cardiovascular diseases and mental disorders, was investigated. The fatty acid (FA) composition in lipids from seven sea weed species from the North Sea (Ulva lactuca, Chondrus crispus, Laminar...

Algae are currently used for production of niche products and are becoming increasingly interesting for the production of bulk commodities, such as biodiesel. For the production of these goods to become economically feasible, production costs will have to be lowered by one order of magnitude. The application of two-phase systems could be used to lo...

During the in situ extraction of β-carotene from Dunaliella salina, the causal relationship between carotenoid extraction and cell death indicated that cell growth and cell death should be at equilibrium for a continuous in situ extraction process. In a flat-panel photobioreactor that was operated as a turbidostat cell numbers of stressed cells wer...

Plants most suitable for growing under high saline or even seawater conditions are the ones naturally living under high saline circumstances. A series of tolerant or moderate salt tolerant plants are experimentally tested and described in literature. For many species of this group a threshold value has also been described.

In the so-called milking process of Dunaliella salina carotenoids are extracted and simultaneously produced by the culture, whilst the biomass concentration remains constant. Different theories exist about the extraction mechanisms although none have been proven yet. In this research, direct contact between dodecane and cells during the extraction...

Dunaliella salina is a halotolerant green alga that is well known for its carotenoid producing capacity. The produced carotenoids are mainly stored in lipid globules. For various research purposes, such as production and extraction kinetics, we would like to determine and/or localise the carotenoid globules in vivo. In this study, we show that the...

Introduction Species Concepts in Wild Plants Classification Philosophies in Wild and Cultivated Plants Brief History of Nomenclature and Codes Fundamental Differences in the Classification and Nomenclature of Cultivated and Wild Plants A Comparison of the ICBN and ICNCP Possible New Codes Cultivated Plant Nomenclature and the Law Cultivar Epithets...

Het project Zilte Landbouw Texel is in mei 2006 van start gegaan op het perceel nabij ‘De Petten’ op Texel. Er is gekozen om een Zilte Proeftuin aan te leggen op een nabij gelegen perceel waar gedurende twee jaar ongeveer twintig verschillende potentiële zilte gewassen zijn onderzocht op hun groei onder zoute condities en hun marktpotentie. De focu...

This paper deals with the topic of green care and several of its interventions, mainly care farming and animal‐assisted interventions. It explains the corresponding terminology and definitions and examples of Austria and the Netherlands are described. Further, it focuses on the possibility of national and international cross‐interventional exchange...

Aan de hand van schilderijen wordt de geschiedenis van de aspergeteelt in Nederland besproken. Het belang van gewasgeschiedenis voor de verdere ontwikkeling van de teelt wordt benadrukt.

The process of the simultaneous production and extraction of carotenoids, milking, of Dunaliella salina was studied. We would like to know the selectivity of this process. Could all the carotenoids produced be extracted? And would it be possible to vary the profile of the produced carotenoids and, consequently, influence the type of carotenoids ext...

Veranderingen in klimaat zullen gevolgen hebben voor gewasopbrengsten en op termijn zal ook de veehouderij als geheel gevolgen ondervinden. In deze korte notitie worden mogelijke effecten geïnventariseerd en per sector aangegeven hoe hierop te reageren. Deze notitie maakt onderdeel uit van "Wegen naar een klimaatbestendiger Nederland" (studie van P...

The typification of six Linnaean Datura names (D. stramonium, D. metel, D. arborea, D. ferox, D. fastuosa and D. tatuld) is discussed. A modification to the typification of D.fastuosa is proposed and a lectotype for D. tatula is designated here.

A lectotype for Clematis integrifolia L. has been designated: Hortus Siccus Cliffortianus: 225, Clematis 5 (BM). A description, based on specimens covered in the wild from sites in Central Europe, is presented.

OOST, E. H., BRANDENBURG, W. A. & JARVIS, C. E., 1989. Typification of Brassica oleracea L. (Cruciferae) and its Linnaean varieties. The Linnaean concept of Brassica oleracea and its varieties is discussed. In the light of this concept several types are considered and chosen.

During the 20th century hunger has become a problem of poverty amidst plenty rather than absolute food scarcity. The question is whether this will remain so or whether the hunger of the poor will once more be exacerbated by rising food prices. In this paper we discuss biophysical conditions, social forces and non-linear interactions that may critic...

De zeespiegelstijging en de bodemdaling in Nederland leiden ertoe dat steeds meer land - met name agrarisch land - verzilt. Dit rapport richt zich op het benutten i.p.v. bestrijden van verzilting.

During the symposium "Marine Biotechnology: Basics and Applications", held 25 February-1 March, 2003 in Matalascañas, Spain, a special brainstorm session was organized. Two questions were addressed: 1, "What is the most desirable development in marine biotechnology"?; 2, "What is the most spectacular development in this field in your 'wildest' drea...

A first SPME based frgarance analysis of various rose cultivars and implications for rebreeding flower fragarance.

The typification of Clematis viticella L. is discussed, and a lectotype designated from the Clifford Herbarium (BM). A standard specimen for C. viticella«Purpurea Plena Elegans» has also been selected. Data from hybridization experiments and studies of natural distribution suggest that Clematis campaniflora Brotero is better treated as a subspecies...

The typification of Clematis viticella L. is discussed, and a lectotype designated from the Clifford Herbarium (BM). A standard specimen for C. viticella‘Purpurea Plena Elegans’ has also been selected. Data from hybridization experiments and studies of natural distribution suggest that Clematis campaniflora Brotero is better treated as a subspecies...

There is an increasing interest in a cultonomic approach towards the classification and nomenclature of cultivated plants. The way it promotes and implements cultivar classification is especially appealing to those who need more stability of names in the everyday practice of dealing with cultivated plants (breeders, growers, traders, consumers, law...

A new classification for the cultivated and weed forms of beet is proposed. The paper includes a short description of concept and rules of the new system for the nomenclature of cultivated plants, as published in the 1995 International Code of Nomenclature for Cultivated Plants or Cultivated Plant Code. The classification has an open character, and...

Twenty two morphological characters of twenty three taxa of the genera Physalis, Margaranthus and Withania were analysed with the help of phenetic methods in an attempt to increase the understanding of the relationships within the genus Physalis. A clear distinction is shown between the Old World species, P. alkekengi and P. glabripes, and the New...

The typification of six LinnaeanDaturanames (D. stramonium,D. metel,D. arborea,D. ferox,D. fastuosaandD. tatula) is discussed. A modification to the typification ofD. fastuosais proposed and a lectotype forD. tatulais designated here.

A lectotype forClematis integrifoliaL. has been designated: Hortus Siccus Cliffortianus: 225,Clematis5 (BM). A description, based on specimens covered in the wild from sites in Central Europe, is presented.

Important episodes in the history of the classification of cultivated plants are highlighted and commented upon in the light of recent developments in the systematics of cultivated plants. It is shown that throughout history, a division between classifying cultivated plants and plants as found in nature has existed in the minds of most taxonomists,...

The primacy of botanical nomendature as ruled by the ICBN (International Code of Botanical Nomendature) has always overshadowed the nomendature of cultivated plants and it is often stated that the latter is a subset of the former. Since nomendature is a corollary of proposed dassifications, which themselves are based on a taxonomists' systematic th...

Hetterscheid, W. L. A. & Brandenburg, W. A.: Culton versus taxon: conceptual issues in cultivated plant systematics. – Taxon 44: 161‐175. 1995. – ISSN 0040‐0262. The systematics of cultivated plants need to be divorced from a number of confusing ties with the systematics of plants found in nature. These ties have been developed in time because syst...

An investigation was made into the causes why bolters occur in carrot cultivation. In the first year of cultivation blooming plants are the result of a gene flow from wild to cultivated carrots. Hybridization may occur in areas where cultivated carrots are grown for seed production. Apart from bolters producing inedible roots such hybridization als...

Two important problems hamper progress towards an unambiguous classification of cultivated plants. The first problem arises from the incompatibility between the International Code of Botanical Nomenclature (ICBN) and the International Code of Nomenclature for Cultivated Plants (ICNCP). The ICBN is restricted to nomenclature, the ICNCP treats nomenc...

The delimitation of the species Daucus carota L. is confused by the occurrence of crop-weed complexes. As a result of a study of the Linnaean protologue and the elements on which it is based, specimen 340.1 (LINN) is designated as lectotype for Daucus carota L. Vouchers and the status of the unnamed varieties β and γ are discussed.

In this paper a lectotype for Salix alba L. is designated from the Burser herbarium (UPS).

The germination, growth and quality of Aster tripolium L. was analysed to study cultivation of the wild leafy plant into a commercial vegetable crop. Soil type and soil condition (non-saline, brackish and saline)were basically proved in relation to germination capacity, yield and plant behaviour with respect to external and internal quality aspects...

As part of a taxonomic study of cultivated Brassica, B. rapa L. is lectotypified by a Matthiolus illustration, the lectotype of B. campestris L., chosen by Jonsell, is restricted to a single specimen in LINN and a neotype is designated for B. chinensis L. from the Bailey Herbarium.

A lectotype for Clematis orientalis L. has been designated: “ Flammula scandens, apii folio glauco ”. Dill. Elth. 144, t. 119, f. 145 (1732). The typotype has been based on specimen 2868 of the Dillenian Herbarium of the Hortus Elthamensis (OXF). We consider the sources of the Euphrates and the surroundings of Erzurum (Turkey) as the type locality...

A lectotype for Clematis orientalis L. has been designated: "Flammula scandens, apii folio glauco". Dill. Elth. 144, t. 119, f. 145 (1732). The typotype has been based on specimen 2868 of the Dillenian Herbarium of the "Hortus Elthamensis" (OXF). We consider the sources of the Euphrates and the surroundings of Erzurum (Turkey) as the type locality...

Paintings produced in Flanders and Holland from the 16th to the 19th centuries are useful sources for a study of the evolution of domesticated crops. They show many types of vegetables, fruits, and ornamentals that are either not described or scantly mentioned in the literature of that period. So we come across “really red” cabbage, which may have...

Agricultural practice demands principles for classification, starting from the basal entity in cultivated plants: the cultivar. In establishing biosystematic relationships between wild, weedy and cultivated plants, the species concept needs re-examination. Combining of botanic classification, based on biosystematic research, and agricultural classi...

Infraspecific cytogenetical variation was studied in a diverse collection of five non-cultivated and cultivatedCucumis sativus accessions. The individual chromosomes of different accessions could be identified by the C-banding pattern and chromosome measurements. About 40–50% of the genomic area are made up of heterochromatin inC. sativus. The non-...

The development of large-floweredClematis hybrids is briefly surveyed. The need for a botanic classification of these hybrids has been discussed.Die Entstehung grobltigerClematis-Bastarde wird in kurzer Form umrissen. Die Notwendigkeit einer botanischen Klassifikation dieser Hybriden wird diskutiert. Clematis . .

A theory about the descent and development of modern carrot cultivars in Europe formulated byBanga (1963) is discussed. According to this author, the cultivated carrot originates from Afghan carrot material. Furthermore, the origin of carrots with fleshy, orange roots is suggested to lay in the Netherlands in the 17th century. However, it is shown...