Natuurtijdschriften: Natuurtijdschriften

Na morinelplevier en bijeneter nu ook de notenkraker Tenminste één paar broedende notenkrakers Article

Het Vogeljaar, 17(3), 73-74.

D.R. Veenhuizen and A. Verver

January 1969
Veldwaarnemingen LXX Article

Het Vogeljaar, 17(2), 67-70.

Jaap Taapken

January 1969
Over het boeiende dagritme van steltlopers Article

Het Vogeljaar, 17(2), 66-66.

T. Lebret

January 1969
De kokmeeuw in Drente in 1968 Article

Het Vogeljaar, 17(2), 61-66.

W.Ph. ten Klooster

January 1969
Vogelfoto-paradepaardjes 1968 Article

Het Vogeljaar, 17(2), 56-60.

onbekend

January 1969
Olie veroorzaakte omvangrijke vogelsterfte Article

Het Vogeljaar, 17(2), 55-56.

onbekend

January 1969
Ook kwik bedreiging voor onze stootvogels Article

Het Vogeljaar, 17(2), 53-55.

onbekend

January 1969
Alarmerende gebeurtenissen Article

Het Vogeljaar, 17(2), 51-53.

G. Ouweneel

January 1969
Veldwaarnemingen LXIX Article

Het Vogeljaar, 17(1), 43-48.

Jaap Taapken

January 1969
Duitse zeearenden moeten bewaakt worden Article

Het Vogeljaar, 17(1), 40-42.

onbekend

January 1969
Over boeken en tijdschriften Article

Het Vogeljaar, 17(1), 37-39.

onbekend

January 1969
Boeiend vogeloord achter ijzeren gordijn Enkele indrukken van de vogelwereld in de Donaudelta Article

Het Vogeljaar, 17(1), 35-36.

P.L.J. Swart

January 1969
Boeiende vergelijking van twee vogelpopulates Verrassend bewijs van Hollands Glorie op ornithologish gebied Article

Het Vogeljaar, 17(1), 26-34.

A. Hoogerwerf

January 1969
Vogelwerkgroep Chr. jeugdbond van natuurvrienden Midwintertelling 1969 in Lauwerszeegebied Article

Het Vogeljaar, 17(1), 19-25.

Arend Timmerman jr.

January 1969
Ooievaarsdorp „Het Liesveld” in de Alblasserwaard Article

Het Vogeljaar, 17(1), 17-18.

H. van Dongen

January 1969
Algerijnse ooievaars broeden in Zwitserland Het ooievaarsdorp in Altreu Article

Het Vogeljaar, 17(1), 15-16.

Max Bloesch

January 1969
Activiteiten gedurende de laatste tien jaren De Nederlandse Vereniging tot Bescherming van Vogels zeventig jaar Article

Het Vogeljaar, 17(1), 3-14.

J.E. Carrière

January 1969
Drievoudige reden tot vreugde Article

Het Vogeljaar, 17(1), 1-2.

onbekend

January 1969
Book Review Article

Acta botanica neerlandica, 18(6), 713-713.

M.F. Mörzer Bruyns

January 1969
A method of water culture for experiments with micronutrient elements Article

Acta botanica neerlandica, 18(6), 709-712.

J.J. Uittien and A.A. Steiner

January 1969
The use of silicone rubber plastic for replicating leaf surfaces Article

Acta botanica neerlandica, 18(6), 703-708.

Janny Groot

January 1969
The influence of p- and m-cresol on the pH optimum of indoleacetic acid oxidase of various origin Article

Acta botanica neerlandica, 18(6), 700-702.

M.G.H. Janssen

January 1969
Morphogenesis of isolated floral buds of Ranunculus sceleratus L. in vitro Article

Acta botanica neerlandica, 18(6), 680-699.

R.N. Konar and K. Nataraja

January 1969
Notes on American Loganiaceae. IV. Revision of Desfontainia Ruiz et Pav. Article

Acta botanica neerlandica, 18(6), 669-679.

A.J.M. Leeuwenberg

January 1969
Stomatal ontogeny and phylogeny. I. Monocotyledons Article

Acta botanica neerlandica, 18(5), 654-668.

G.S. Paliwal

January 1969
The liberation of inhibitors of indoleacetic acid oxidase activity out of Coleus internodes treated with potassium hydroxide or sulphuric acid Article

Acta botanica neerlandica, 18(5), 651-653.

R. Soekarjo and M.G.H. Janssen

January 1969
Biosystematic studies on Spergularia media and S. marina in the Netherlands. IV. Reproduction, dissemination, karyogenetics and taxonomy Article

Acta botanica neerlandica, 18(5), 639-650.

A.A. Sterk

January 1969
The influence of some phenolic cofactors on the pH optimum of indoleacetic acid oxidase from pea roots Article

Acta botanica neerlandica, 18(5), 634-638.

M.G.H. Janssen

January 1969
Cladonia ecmocyna Nyl. – Investigations on the ontogeny Article

Acta botanica neerlandica, 18(5), 627-633.

M. Jahns, H.A. Beltman and P. van der Knaap

January 1969
Separation of IAA degrading enzymes from pea roots on columns of polyvinylpyrrolidone Article

Acta botanica neerlandica, 18(5), 620-626.

C.A. van der Mast

January 1969
A new type of life history in Bryopsis (Chlorophyceae, Caulerpales) Article

Acta botanica neerlandica, 18(5), 615-619.

H. Rietema

January 1969
The release of free amino acids from germinating pollen Article

Acta botanica neerlandica, 18(5), 605-614.

H.F. Linskens and J. Schrauwen

January 1969
Biotaxonomic notes on the Rumex acetosella complex in the Netherlands Article

Acta botanica neerlandica, 18(5), 597-604.

A.A. Sterk, W.M. van der Leeuw, P.H. Nienhuis and J. Simons

January 1969
The cutin acids of smooth and russeted “Golden Delicious” apples Article

Acta botanica neerlandica, 18(5), 589-596.

H.A.M.A. de Vries

January 1969
Notes on American Gesneriaceae V. A new species of Episcia Mart. Article

Acta botanica neerlandica, 18(5), 585-588.

A.J.M. Leeuwenberg

January 1969
Book Reviews Article

Acta botanica neerlandica, 18(4), 580-583.

J. Muller, E. van der Maarel and A.J.M. Leeuwenberg

January 1969
Meetings of the Botanical Society of the Netherlands Article

Acta botanica neerlandica, 18(4), 578-579.

onbekend

January 1969
Biosystematic studies on Spergularia media and S. marina in the Netherlands. III. The variability of S. media and S. marina in relation to the environment Article

Acta botanica neerlandica, 18(4), 561-577.

A.A. Sterk

January 1969
Differential effect of low oxygentension on protein and carbohydrate metabolism in barley roots Article

Acta botanica neerlandica, 18(4), 558-560.

M.C.J. de Wit

January 1969
On the influence of gibberellic acid and kinetin on the germination of turions of Spirodela polyrhiza (L.) Schleiden Article

Acta botanica neerlandica, 18(4), 550-557.

M.A.M. Lacor

January 1969
Cytotaxonomic studies in the genus Symphytum.II. Crossing experiments between Symphytum officinale L. and Symphytum asperum Lepech. Article

Acta botanica neerlandica, 18(4), 544-549.

Th.W.J. Gadella and E. Kliphuis

January 1969
An explanation of the different pH optima for indoleacetic acid oxidase activity of extracts from roots of pea and cucumber Article

Acta botanica neerlandica, 18(4), 538-543.

M.G.H. Janssen

January 1969
The influence of acropetally transported indoleacetic acid on the geotropism of intact pea roots and its modification by 2, 3, 5-triiodobenzoic acid Article

Acta botanica neerlandica, 18(4), 528-537.

H. Konings

January 1969
Palynology of the first 30 metres of a 120 m deep section in Northern Greece Article

Acta botanica neerlandica, 18(4), 511-527.

T.A. Wijmstra

January 1969
Pavlova mesolychnon (Chrysophyta) a new species from the Tamar estuary, Cornwall Article

Acta botanica neerlandica, 18(4), 496-510.

J. van der Veer

January 1969
The occurrence of Pythium in the Netherlands. II Another heterothallic species: Pythium splendens Braun Article

Acta botanica neerlandica, 18(4), 489-495.

A.J. van der Plaats-Niterink

January 1969
Book Reviews Article

Acta botanica neerlandica, 18(3), 487-488.

M. Jacobs

January 1969
Meetings of the Botanical Society of the Netherlands Article

Acta botanica neerlandica, 18(3), 483-486.

onbekend

January 1969
Factor analysis as a method in synecological research Article

Acta botanica neerlandica, 18(3), 477-482.

L.F.M. Fresco

January 1969
Biosystematic studies on Spergularia media and S. marina in the Netherlands II. The morphological variation of S. marina Article

Acta botanica neerlandica, 18(3), 467-476.

A.A. Sterk

January 1969
Novitates Burseracearum III (Addenda) Article

Acta botanica neerlandica, 18(3), 466-466.

J.J. Swart

January 1969
New taxa and combinations in the neotropical Olmedieae Article

Acta botanica neerlandica, 18(3), 462-465.

C.C. Berg

January 1969
The penetration and adsorption of Cesium in bean leaves Article

Acta botanica neerlandica, 18(3), 455-461.

E. Levi

January 1969
Auxin transport, auxin metabolism and ageing Article

Acta botanica neerlandica, 18(3), 447-454.

H. Veen

January 1969
A new species of Urtica from the Papuan highlands and an emended distinction of Urtica urens and dioica Article

Acta botanica neerlandica, 18(3), 442-446.

M. Zandee

January 1969
The atlantic species of Rhizophora Article

Acta botanica neerlandica, 18(3), 434-441.

F.J. Breteler

January 1969
The form of indoleacetic acid oxidase of pea roots Article

Acta botanica neerlandica, 18(3), 429-433.

M.G.H. Janssen

January 1969
Pauldopia, a new genus of southeast Asian Bignoniaceae Article

Acta botanica neerlandica, 18(3), 425-428.

C.G.G.J. van Steenis

January 1969
Studies on productivity of Coffee. III – Differences in photosynthesis between four varieties of coffee Article

Acta botanica neerlandica, 18(3), 420-424.

M.A. Nunes, J.F. Bierhuizen and C. Ploegman

January 1969
The histochemical localization of dehydrogenases in the cotyledons of Pisum sativum L. during germination Article

Acta botanica neerlandica, 18(3), 406-419.

C. Kollöffel

January 1969
New species of Souroubea (Marcgraviaceae) Article

Acta botanica neerlandica, 18(3), 401-405.

A.C. de Roon

January 1969
Meetings of the Botanical Society of the Netherlands Article

Acta botanica neerlandica, 18(2), 396-400.

onbekend

January 1969
A contribution to the wood anatomy of South American (chiefly Suriname) Rubiaceae. II Article

Acta botanica neerlandica, 18(2), 377-395.

J. Koek-Noorman

January 1969
The african Dichapetalaceae I Article

Acta botanica neerlandica, 18(2), 375-376.

F.J. Breteler

January 1969
Studies on productivity of Coffee. II – Effect of soil moisture on photosynthesis and transpiration of Coffea arabica Article

Acta botanica neerlandica, 18(2), 367-374.

J.F. Bierhuizen, M.A. Nunes and C. Ploegman

January 1969
The role of changes in enzyme activities in the regulation of carbohydrate dissimilation in potato tuber tissue after wounding or infection with Gibberella zeae Article

Acta botanica neerlandica, 18(2), 353-366.

J.D. Verleur

January 1969
The influence of light of different spectral regions on the synthesis of phenolic compounds in gherkin seedlings, in relation to photomorphogenesis. VI. Phenol synthesis and photoperiodism Article

Acta botanica neerlandica, 18(2), 347-352.

G. Engelsma

January 1969
An investigation of the polyphenoloxidase test with catechol and proline Article

Acta botanica neerlandica, 18(2), 343-346.

M.G.H. Janssen

January 1969
Action of hydrolytic enzymes on spinach chloroplast fragments Article

Acta botanica neerlandica, 18(2), 339-342.

C. Bril, J.F. Hobbelen, J.C. van Miltenburg, Y. Schouwstra and J.B. Thomas

January 1969
Biosystematic studies of Spergularia media and S. marina in the Netherlands I. The morphological variability of S. media Article

Acta botanica neerlandica, 18(2), 325-338.

A.A. Sterk

January 1969
On the contribution of air-borne salt to the gradient character of the Voorne Dune area Article

Acta botanica neerlandica, 18(2), 315-324.

Clara J.M. Sloet van Oldruitenborgh and Els Heeres

January 1969
The lignin of Populus nigra L. cv. ‘Italica’. A comparative study of the lignified structures in tissue cultures and the tissues of the tree Article

Acta botanica neerlandica, 18(2), 241-314.

Catharina J. Venverloo

January 1969
Intimations on Quaternary palaeoecology of Africa Article

Acta botanica neerlandica, 18(1), 230-239.

E.M. van Zinderen Bakker

January 1969
Studies on phloem exudation from Yucca flaccida Haw. VII. The effect of cooling on exudation Article

Acta botanica neerlandica, 18(1), 224-229.

P.M.L. Tammes, C.R. Vonk and J. van Die

January 1969
Joseph Gaertner and his carpologia Article

Acta botanica neerlandica, 18(1), 216-223.

F.A. Stafleu

January 1969
Nucleic acids in plastids and starch formation Article

Acta botanica neerlandica, 18(1), 203-215.

R. Salema and N.P. Badenhuizen

January 1969
Three new species and a new subspecies of Marcgravia and Souroubea (Marcgraviaceae) from Central America Article

Acta botanica neerlandica, 18(1), 197-202.

A.C. de Roon

January 1969
Some investigations on the Mycorrhiza of Calluna, Erica and Vaccinium Article

Acta botanica neerlandica, 18(1), 180-196.

P.J. Nieuwdorp

January 1969
The wood structure of Dicranostyles (Convolvulaceae) Article

Acta botanica neerlandica, 18(1), 173-179.

Alberta M.W. Mennega

January 1969
Time, space, light and darkness in the metabolic flare-up of the Sauromatum appendix Article

Acta botanica neerlandica, 18(1), 159-172.

Bastiaan J.D. Meeuse and Richard G. Buggeln

January 1969
Notes on American Loganiaceae III. Revision of Bonyunia Rich. Schomb. Article

Acta botanica neerlandica, 18(1), 152-158.

A.J.M. Leeuwenberg

January 1969
Some observations on barium sulphate in Spirogyra Article

Acta botanica neerlandica, 18(1), 143-151.

D.R. Kreger and H. Boeré

January 1969
Two new species of ferns from Suriname Article

Acta botanica neerlandica, 18(1), 138-142.

K.U. Kramer

January 1969
The occurrence of asperulosidic glycosides in the Rubiaceae Article

Acta botanica neerlandica, 18(1), 124-137.

P. Kooiman

January 1969
A contribution to the wood anatomy of South American (chiefly Suriname) Rubiaceae. I. Article

Acta botanica neerlandica, 18(1), 108-123.

J. Koek-Noorman

January 1969
An electron-microscopical study of the plasmodesmata in the roots of young barley seedlings Article

Acta botanica neerlandica, 18(1), 99-107.

R.J. Helder and J. Boerma

January 1969
Gregor Mendel and Hugo de Vries on the species concept Article

Acta botanica neerlandica, 18(1), 95-98.

J. Heimans

January 1969
Oscillations in the redistribution of the growth sibstance naphthylacetic acid after phototropic induction Article

Acta botanica neerlandica, 18(1), 84-94.

I. de Haan

January 1969
Chromosome numbers and seedling morphology of some Angiospermae collected in Brazil Article

Acta botanica neerlandica, 18(1), 74-83.

Th.W.J. Gadella, E. Kliphuis, J.C. Lindeman and E.A. Mennega

January 1969
Cytotaxonomic notes on African Papilionaceae Article

Acta botanica neerlandica, 18(1), 67-73.

J.A. Frahm-Leliveld

January 1969
Responses of bean plants to root temperatures. IV Translocation of 22Na applied to the leaves Article

Acta botanica neerlandica, 18(1), 58-66.

R. Brouwer and E. Levi

January 1969
On a case of polyembryony in Pterocarya fraxinifolia (Juglandaceae) and on polyembryony in general Article

Acta botanica neerlandica, 18(1), 50-57.

F. Bouman and F.D. Boesewinkel

January 1969
The effect of low temperature on dry matter production, chlorophyll concentration and photosynthesis of maize plants of different ages Article

Acta botanica neerlandica, 18(1), 39-49.

Th. Alberda

January 1969
Intercellular polar transport and the role of the plasmodesmata in coleoptiles and Vallisneria leaves Article

Acta botanica neerlandica, 18(1), 14-38.

W.H. Arisz

January 1969
Theo J. Stomps Article

Acta botanica neerlandica, 18(1), 12-13.

B. Polak

January 1969
G. van Iterson Jr. Article

Acta botanica neerlandica, 18(1), 8-11.

A.D.J. Meeuse

January 1969
Cornelius Elisa Bertus Bremekamp Article

Acta botanica neerlandica, 18(1), 6-7.

J. Lanjouw

January 1969
Willem Hendrik Arisz Article

Acta botanica neerlandica, 18(1), 3-5.

I. de Haan

January 1969
Preamble Article

Acta botanica neerlandica, 18(1), 1-1.

H.F. Linskens

January 1969
Boekaankondiging Article

Gorteria Dutch Botanical Archives, 4(12), 218-218.

C. Kalkman

January 1969

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