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DIE LEHRERAUSBILDUNG IN NIGERIA. EIN BEISPIEL FUR DIE PHASEN DER BILDUNGSHILFE IN TROPISCH-AFRIKA LA FORMATION DES ENSEIGNANTS AU NIGERIA. UN EXEMPLE POUR LES PHASES DE L'AIDE A LA FORMATION EN AFRIQUE TROPICALESIEVERS A.PADAGOGISCHE RUNDSCHAU. 1973, Vol 27, Num 12, pp 915-929Article

REGULATION OF THE POSITION OF STATOLITHS IN CHARA RHIZOIDSHEJNOWICZ Z; SIEVERS A.1981; PROTOPLASMA; ISSN 0033-183X; AUT; DA. 1981; VOL. 108; NO 1-2; PP. 117-137; BIBL. 2 P.Article

Die Relevanz der Entwicklungsländer im Geographiestudium. Gedanken zur Konzeptualisierung. (The relevance of developing countries in the study of geography. Thoughts about conceptualization)SIEVERS, A.Osnabrücker Studien zur Geographie Osnabrück. 1978, Vol 1, pp 247-267Article

WIRKUNG DER INVERSION AUF DIE ANORDNUNG DES ENDOPLASMATISCHEN RETICULUMS UND DIE POLARITAET VON STATOCYTEN IN WURZELN VON LEPIDIUM SATIVUM = EFFET DE L'INVERSION SUR LA DISPOSITION DU RETICULUM ENDOPLASMIQUE ET SUR LA POLARITE DES STATOCYTES (CELLULES CENTRALES DE LA COIFFE) DANS LES RACINES DE L. S.VOLKMANN D; SIEVERS A.1975; PLANTA; ALLEM.; DA. 1975; VOL. 127; NO 1; PP. 11-19; ABS. ANGL.; BIBL. 14REF.Article

EFFECTS OF PROLONGED OMNILATERAL GRAVISTIMULATION ON THE ULTRASTRUCTURE OF STATOCYTES AND ON THE GRAVIRESPONSE OF ROOTSHENSEL W; SIEVERS A.1980; PLANTA; ISSN 0032-0935; DEU; DA. 1980; VOL. 150; NO 4; PP. 338-346; BIBL. 25 REF.Article

MEGASPOROGENESE VON SELAGINELLA. I: ULTRASTRUKTURELLE UND CYTOCHEMISCHE UNTERSUCHUNGEN ZUR SEKRETION VON POLYSACCHARIDEN = MEGASPOROGENESE CHEZ S. I: ETUDE ULTRASTRUCTURALE ET CYTOCHIMIQUE DE LA SECRETION DES POLYOSIDESBUCHEN B; SIEVERS A.1978; PROTOPLASMA; AUT; DA. 1978; VOL. 96; NO 3-4; PP. 293-317; ABS. ENG; BIBL. 76 REF.Article

INDUCTION OF GRAVITY-DEPENDENT PLASMATIC RESPONSES IN ROOT STATOCYTES BY SHORT TIME CONTACT BETWEEN AMYLOPLASTS AND THE DISTAL ENDOPLASMIC RETICULUM COMPLEXHENSEL W; SIEVERS A.1981; PLANTA; ISSN 0032-0935; DEU; DA. 1981; VOL. 153; NO 4; PP. 303-307; BIBL. 9 REF.Article

VORTEILHAFTE VERWENDUNG EINFACHEN KIESELGELS (<63 MU ) IN DER PRAEPARATIVEN HOCHDRUCK-FLUESSIGKEITS-CHROMATOGRAPHIE (HPLC) = APPLICATION AVANTAGEUSE DE GELS DE SILICE SIMPLES (<63 MU ) EN CHROMATOGRAPHIE PHASE LIQUIDE HAUTE PRESSION PREPARATIVETHIEM J; SIEVERS A.1980; FRESENIUS Z. ANAL. CHEM.; ISSN 0016-1152; DEU; DA. 1980; VOL. 304; NO 5; PP. 369-373; ABS. ENG; BIBL. 13 REF.Article

MEGASPOROGENESE VON SELAGINELLA. II: ULTRASTRUKTURELLE UND CYTOCHEMISCHE UNTERSUCHUNGEN ZUR SEKRETION VON LIPIDEN = MEGASPOROGENESE CHEZ S.II: ANALYSE ULTRASTRUCTURALE ET CYTOCHIMIQUE DES SECRETIONS DE LIPIDESBUCHEN B; SIEVERS A.1978; PROTOPLASMA; AUT; DA. 1978; VOL. 96; NO 3-4; PP. 319-328; BIBL. 43 REF.Article

ULTRASTRUCTURE OF GRAVITY-PERCEIVING CELLS IN PLANT ROOTS.SIEVERS A; VOLKMANN D.1977; PROC. R. SOC. LONDON, B; G.B.; DA. 1977; VOL. 199; NO 1137; PP. 525-536; H.T. 5; BIBL. 1 P.Article

CONCANAVALIN A BINDS TO THE ENDOPLASMIC RETICULUM AND THE STARCH GRAIN SURFACE OF ROOT STATOCYTESSCHNEIDER EM; SIEVERS A.1981; PLANTA; ISSN 0032-0935; DEU; DA. 1981; VOL. 152; NO 3; PP. 177-180; BIBL. 19 REF.Article

DARSTELLUNG EINES OLIGODESOXYDISACCHARIDE PHENYL-4-O-BETA -D-TYVELOSYL-ALPHA -D-RHAMNOSID UND METHYL-4-O-BETA -D-TYVELOSYL-ALPHA -D-OLIVOSID DURCH MODIFIZIERUNG VON MANNOBIOSE = PREPARATION DES OLIGODESOXYDIHOLOSIDES O-BETA -D-TYVELOSYL-4 ALPHA -D-RHAMNOSIDE DE PHENYLE ET O-BETA -D-TYVELOSYL-4 ALPHA -D-OLIVOSIDE DE METHYLE PAR MODIFICATION DU MANNOBIOSETHIEM J; SIEVERS A.1980; CHEM. BER.; ISSN 0009-2940; DEU; DA. 1980; VOL. 113; NO 11; PP. 3505-3510; ABS. ENG; BIBL. 16 REF.Article

UNTERSUCHUNGEN ZUR MODIFIZIERUNG DER MANNOBIOSE UND SYNTHESE VON METHYL-4-O-BETA -D-RHAMNOSYL-ALPHA -D-OLIVOSID = ETUDES SUR LA MODIFICATION DU MANNOBIOSE ET SYNTHESE D'O-BETA -D-RHAMNOSYL-4 ALPHA -D-OLIVOSIDE DE METHYLETHIEM J; SIEVERS A.1979; CHEM. BER.; DEU; DA. 1979; VOL. 112; NO 3; PP. 1035-1045; ABS. ENG; BIBL. 17 REF.Article

ROENTGEN-MIKROANALYSE VON BARIUM, SCHWEFEL UND STRONTIUM IN STATOLITHEN-KOMPARTIMENTEN VON CHARA-RHIZOIDEN = MICROANALYSE AUX RAYONS X DU BARYUM, SOUFRE ET STRONTIUM DANS LES STATOLITHES DES RHIZOIDES DE C.SIEVERS A; SCHMITZ M.1982; BER. DTSCH. BOT. GES.; ISSN 0365-9631; DEU; DA. 1982; VOL. 95; NO 2; PP. 353-360; ABS. ENG; BIBL. 12 REF.Article

TOWARDS A MORE CRITICAL USE OF CLINOSTATSSIEVERS A; HENSEL W.1981; NATURWISSENSCHAFTEN; ISSN 0028-1042; DEU; DA. 1981; VOL. 68; NO 8; PP. 429; BIBL. 11 REF.Article

MESURES INSTATIONNAIRES DANS LES TURBOMACHINESLARGUIER R; DE SIEVERS A.1975; RECH. AEROSPAT.; FR.; DA. 1975; PP. 267-277; ABS. ANGL.; BIBL. 21REF.Article

MEMBRANE CONTACTS OF THE ENDOPLASMIC RETICULUM WITH PLASTIDS AND WITH THE PLASMALEMMA IN THE ENDOTHECIUM OF SCILLA NON-SCRIPTA.RODRIGUEZ GARCIA MI; SIEVERS A.1977; CYTOBIOLOGIE; DTSCH.; DA. 1977; VOL. 15; NO 1; PP. 85-95; BIBL. 24 REF.Article

THE EFFECT OF CENTRIFUGAL ACCELERATIONS ON THE POLARITY OF STATOCYTES AND ON THE GRAVIPERCEPTION OF CRESS ROOTS = EFFETS D'ACCELERATIONS CENTRIFUGES SUR LA POLARITE DES STATOCYTES ET SUR LA GRAVIPERCEPTION DES RACINES DE CRESSONSIEVERS A; HEYDER CASPERS L.1983; PLANTA; ISSN 0032-0935; DEU; DA. 1983; VOL. 157; NO 1; PP. 64-70; BIBL. 13 REF.Article

POLARITY IN MECHANORECEPTOR CELLS OF TRIGGER HAIRS OF DIONAEA MUSCIPULA ELLISBUCHEN B; HENSEL D; SIEVERS A et al.1983; PLANTA; ISSN 0032-0935; DEU; DA. 1983; VOL. 158; NO 5; PP. 458-468; BIBL. 45 REF.Article

LARGE MAGNETIC COILS-DESIGN ACCOMPANYING CALCULATION AND OPTIMIZATION REGARDING ORTHOTROPIC INTERLAYERS, TEMPERATURE AND ELASTIC SUPPORTS-DERIVATION OF A SPECIAL FINITE ELEMENT.STELZER JF; SIEVERS A; WELZEL R et al.1976; BER. KERNFORSCH.-ANLAGE JUELICH; DTSCH.; DA. 1976; NO 1349; PP. (82P.); ABS. ANGL.; BIBL. DISSEM.Serial Issue

DISPOSITIF D'ETUDE DE L'ECOULEMENT AERODYNAMIQUE INTERNE D'UNE TURBOMACHINE AXIALE.DE SIEVERS A; LARGUIER R; ROY M et al.1973; BULL. ASS. TECH. MARIT. AERONAUT.; FR.; DA. 1973; NO 73; PP. 459-483; ABS. ANGL.; BIBL. 11 REF.Article

X-RAY MICROANALYSIS OF BARIUM AND CALCIUM IN PLANT MATERIAL: SIGNIFICANCE FOR THE ANALYSIS OF STATOLITHS.STEUDLE E; LAUCHLI A; SIEVERS A et al.1978; Z. NATURFORSCH., D; DEU; DA. 1978; VOL. 33; NO 5-6; PP. 444-446; BIBL. 6 REF.Article

Characterization of the optical properties of complex systemsSIEVERS, A. J.Solar energy materials and solar cells. 1994, Vol 32, Num 4, pp 451-462, issn 0927-0248Article

FRACTIONATION AND CHARACTERIZATION OF CELLULAR MEMBRANES FROM ROOT TIPS OF GARDEN CRESS (LEPIDIUM SATIVUM L.) = FRACTIONNEMENT ET CARACTERISATION DES MEMBRANES CELLULAIRES DES EXTREMITES RADICULAIRES DU CRESSON DE JARDIN (L.S. L.)BUCKHOUT TJ; HEYDER CASPERS L; SIEVERS A et al.1982; PLANTA; ISSN 0032-0935; DEU; DA. 1982; VOL. 156; NO 2; PP. 108-116; BIBL. 38 REF.Article

PRAEPARATIVE ZUGAENGE ZU MANNOBIOSE UND LAMINARIBIOSE.THIEM J; SIEVERS A; KARL H et al.1977; J. CHROMATOGR.; NETHERL.; DA. 1977; VOL. 130; PP. 305-313; ABS. ANGL.; BIBL. 44 REF.Article

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