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10:02 IWF (Göttingen) English 1967

Differentiation and Growth in Micrasterias denticulata (Conjugatae)

Desmids in nutrient solution. Nuclear division and septum formation, development of the new half-cells, migration of the nuclei and chloroplasts into the half-cells, differentiation of the chloroplasts and cell walls. Osmotic experiments to demonstrate the mechanics of morphogenesis: plasmolysis by glucose solution, cell wall formation under conditions of reduced turgor. With time-lapse.
  • Published: 1967
  • Publisher: IWF (Göttingen)
  • Language: English
11:02 IWF (Göttingen) English 1980

Stage Specific Protoplasm Streaming in the Stalk of Acetabularia mediterranea

The formation of intracellular transport systems in the course of cell differentiation. A network of cytoplasmic filaments transports chloroplasts, a system of wider cytoplasmic bands moves cell inclusions and generative nuclei. The cytoplasmic bands follow along the filaments and are faster than the movement of the chloroplasts. With time-lapse.
  • Published: 1980
  • Publisher: IWF (Göttingen)
  • Language: English
11:05 IWF (Göttingen) English 1980

Effect of Cytochalasin B and Anti-Microtubule Inhibitors on Protoplasmic Streaming in Acetabularia mediterranea

All intracellular movements are reversibly inhibitedby the anti-microfilament agent cytochalasin B. The microtubule inhibitors colchicine, chlorisopropyl-N-phenyl-carbamate (CIPC), amiprophosmethyl (APM) reversibly inhibit nuclear migration and have no influence on chloroplast movement. With time-lapse.
  • Published: 1980
  • Publisher: IWF (Göttingen)
  • Language: English
08:39 IWF (Göttingen) English 1979

Protoplasmic Streaming

Agitation, circulation, rotational streaming and their variants (multi-striate, sleeve-type, and fountain streaming) as well as shuttle streaming are shown in the following: Allium, Tradescantia, Elodea, Vallisneria, Nitella, Acetabularia, Closterium, Phycomyces, Limnobium and Physarum.
  • Published: 1979
  • Publisher: IWF (Göttingen)
  • Language: English
10:39 IWF (Göttingen) English 1983

Locomotion of Plant Cells

Flagellar movement is visualized using spirochaetes, the algal flagellates Chlamydomonas, Volvox, Euglena, Peranema, Gymnodinium, and the gametes of Chara and Hydrodictyon. Amoeboid movement is demonstrated with Physarum and Amoeba proteus, sliding on Beggiatoa, Oscillatoria, Spirulina and on selected diatoms and desmids.
  • Published: 1983
  • Publisher: IWF (Göttingen)
  • Language: English
10:03 IWF (Göttingen) German 1967

Differenzierung und Wachstum von Micrasterias denticulata (Conjugatae)

Zieralgen in Nährlösung. Kernteilung und Septumbildung, Entwicklung der neuen Halbzelle, Einwandern des Zellkerns und der Chloroplasten, Chloroplastendifferenzierung und Zellwandbildung. Osmotische Versuche zur Mechanik der Formbildung: Plasmolyseform in Glukoselösung, Zellwandbildung bei reduziertem Turgor. Mit Zeitraffung.
  • Published: 1967
  • Publisher: IWF (Göttingen)
  • Language: German
00:43 IWF (Göttingen) German 2005

Plasmaströmung in Algen und Wurzelhaarspitzen

Rotationsströmung in Zellen der Armleuchteralge Nitella flexilis. Plasmaströmung in der Wurzelhaarspitze von Limnobium stoloniferum. Aus der CD-ROM: BEREITER-HAHN, JÜRGEN (Frankfurt a. M.). Die Zelle I - Leben aus Licht und Luft. (C 7100)
  • Published: 2005
  • Publisher: IWF (Göttingen)
  • Language: German
00:57 IWF (Göttingen) German 2005

Endosymbiontentheorie

Amoeba proteus, kombiniert mit 3D-Darstellung von Chloroplast und Mitochondrium. Pantoffeltierchen (Paramecium bursaria) mit einzelligen Algen der Gattung Chlorella im Zytoplasma. Aus der CD-ROM: BEREITER-HAHN, JÜRGEN (Frankfurt a. M.). Die Zelle I - Leben aus Licht und Luft. (C 7100)
  • Published: 2005
  • Publisher: IWF (Göttingen)
  • Language: German
11:13 IWF (Göttingen) English 1970

Sexual Reproduction in the Green Alga Hydrodictyon reticulatum

The water-net. Splitting of the protoplasts into many uninucleate portions, formation of flagella, mobilization and emergence of gametes, copulation (fusion at posterior or flagellar poles), withdrawal of flagella, rounding-off of zygote, development and release of meiospores, polyhedral stage, formation and growth of disc-net.
  • Published: 1970
  • Publisher: IWF (Göttingen)
  • Language: English
11:37 IWF (Göttingen) English 1978

Life History of Ectocarpus siliculosus (Phaeophyta)

Vegetative reproduction and alternation of generations in the brown alga under laboratory conditions: formation of plurilocular sporangia, liberation and germination of mitospores, growth to sporophyte generation; formation of unilocular sporangia, liberation and germination of meiospores, formation of plurilocular gametangia, release and copulation of gametes. Microcinematography, partly in time-lapse, animated graphics of life cycle.
  • Published: 1978
  • Publisher: IWF (Göttingen)
  • Language: English
08:30 IWF (Göttingen) German 1976

Entwicklung von Sphaeroplea annulina (Chlorophyta)

Under conditions of limiting oxygen vegetative reproduction stops and is replaced by sexual reproduction. Metamorphosis of multinucleate cells by antheridia and oogonia. Production of spermatozoids and eggs. Chemotatic attraction of the male gametes, their penetration into the oogonia, fertilization, development of spherical hypnozygotes, zygote germination, growth of the initially bicillate zoospores to threads.
  • Published: 1976
  • Publisher: IWF (Göttingen)
  • Language: German
06:55 IWF (Göttingen) English 1970

Asexual Reproduction in the Green Alga Hydrodictyon reticulatum

The water-net. Formation of tubular network: darkening of the cell, disappearance of the pyrenoids, "pavement stage", differentiation and motility of zoospores, assembly to mesh structure and immobilization of the zoospores, dissolution of old cell-wall, growth of daughter colony up to fully grown net. Flagellar movements and incompletely divided double zoospores.
  • Published: 1970
  • Publisher: IWF (Göttingen)
  • Language: English
07:54 IWF (Göttingen) English 1976

Electron Microscopic Preparation Techniques - 5. Spreading Technique for Preparing Isolated DNA

DNA and cytochrome c spread on the surface of a salt solution. The spreading area is dabbed at random with filmed grids. In this way a thin layer of protein and DNA adheres to the grid. Contrast enhancement by rotation cone shadowing with platinum-iridium alloy.
  • Published: 1976
  • Publisher: IWF (Göttingen)
  • Language: English
20:39 IWF (Göttingen) English 1976

Electron Microscopic Preparation Techniques - 6. Freeze Etching

Preparation of the specimen by glycerol treatment and centrifugation; freezing the specimen; preparing the freeze-etching plant; course of fracturing, etching and shadowing the replica with platinum-iridium alloy and carbon and cone shadowing with carbon; reallife film and animation sequences; cleaning the replicas and mounting on carrier grids. Result: freeze-etched replica of a longitudinally fractured cell of the green alga Ankistrodesmus braunii.
  • Published: 1976
  • Publisher: IWF (Göttingen)
  • Language: English
09:00 IWF (Göttingen) English 1976

Electron Microscopic Preparation Techniques - 1. Making a Plastic Carrier Film

Making a carbon-reinforced carrier film by the "flow out" method, floating off the film on the water surface, judging its quality, coating support grids with film, removing the coated grids from the water surface. Reinforcing the films by coating with evaporated carbon. Demonstration of the results.
  • Published: 1976
  • Publisher: IWF (Göttingen)
  • Language: English
20:39 IWF (Göttingen) German 1976

Elektronenmikroskopische Präparationsmethoden - 6. Gefrierätzung

Vorbereitung des Objekts durch Glyzerinbehandlung und Zentrifugierung; Einfrieren der Präparate; Vorbereitung der Gefrierätzanlage; Ablauf von Gefrierbruch, Ätzung und Herstellung des Abdrucks durch Metall-Kohle-Schrägbedampfung und Kegelbedampfung mit Kohle; natürlicher Ablauf und schematische Darstellung; Reinigung und Aufnehmen der Abdrücke auf Objektträgernetze. Resultat: Gefrierätzabdruck eines Längsbruches durch eine Zelle der Grünalge Ankistrodesmus braunii.
  • Published: 1976
  • Publisher: IWF (Göttingen)
  • Language: German
11:16 IWF (Göttingen) German 1970

Geschlechtliche Fortpflanzung der Grünalge Hydrodictyon reticulatum

Wassernetz. Aufteilung des Protoplasten in viele einkernige Portionen, Ausbildung der Geißeln, Beweglichwerden und Austreten der Gameten, Kopulation (Fusion am Hinterende oder am Geißelpol), Einschmelzen der Geißeln und Abrundung der Zygote, Differenzierung und Schlüpfen der Meiosporen, Polyederstadium, Bildung und Wachstum des Scheibennetzes.
  • Published: 1970
  • Publisher: IWF (Göttingen)
  • Language: German
08:30 IWF (Göttingen) English 1983

Ecology of Larger Foraminifera

Nummulites gizehensis is one of numerous larger foraminifera which from the Carboniferous to the Tertiary contributed to the formation of sedimentary rocks. In the Allgäu, Bavaria, nummulitic limestones are exposed. Recent larger foraminifera occur, like their fossil allies, in warm shallow seas. Upon their death, their shells turn into marine sand. This is illustrated by a Hawaiian sandy beach. The sublittoral algal benthos of a Hawaiian rockpool is a habitat of these sand producers. Here Sorites variabilis, Amphistegina lobifera, Amphistegina lessonii, Peneroplis pertusus and Heterostegina depressa occur the ecology of which is treated in the film. In the interstice of the algae they are protected against surf and solar radiation.
  • Published: 1983
  • Publisher: IWF (Göttingen)
  • Language: English
10:39 IWF (Göttingen) English 1982

The Larger Foraminifer Heterostegina depressa - Organization and Growth of the Megalospheric Generation

The foraminiferan constructs a test and attaches it to the substrate with elastic threads. There are large numbers of symbionts (Diatoms) in its protoplasm; Heterostegina gets its nourishment from them. The film shows test anatomy and organic protective sheaths, cytoplasmic streaming and symbiont transport, local movement with pseudopodia and chamber formation in detail. With time-lapse.
  • Published: 1982
  • Publisher: IWF (Göttingen)
  • Language: English
10:12 IWF (Göttingen) English 1983

The Larger Foraminifer Heterostegina depressa - Multiple Fission in Microspheric and Megalospheric Generation

The protoplasm retreats into the shell shortly before multiple fission. It then flows out through a system of channels before reforming on the shell surface. The second chamber is formed shortly after subdivision into daughter individuals. After a 13 h resting phase the offspring, which are still connected by maternal protoplasmic strands, are dispersed. They settle in the immediate vicinity and start to grow new shells. Time-lapse.
  • Published: 1983
  • Publisher: IWF (Göttingen)
  • Language: English
08:38 IWF (Göttingen) English 1989

Calcarinidae - Larger Foraminiferes of the South Sea

The calcarinidae, which measure only a millimetre in size and have shells composed of calcium carbonate, mainly occur in the Western Pacific. They are characterized by radiating appendices of the shell, which give them a starlike appearance. The following calcarinidae are presented: Baculogypsina sphaerulata, Calcarina calcar, Calcarina defrancii, Calcarina gaudichaudii, Calcarina hispida. The presentation includes quick-motion sequences.
  • Published: 1989
  • Publisher: IWF (Göttingen)
  • Language: English
14:05 IWF (Göttingen) Silent film 2007

Mausohrfledermaus

The DVD contains the IWF-films: E 1837 "Glossophaga soricina (Phyllostomatidae) - Ingestion of Food (Licking)"; E 1838 "Glossophaga soricina (Phyllostomatidae) - Flight in Place"; C 1094 "Biology of the Mouse-eared Bat (Myotis myotis)"; E 1631 "Myotis myotis (Vespertilionidae) - Birth"; C 884 "Sensory Abilities of the Bat Myotis myotis Taking up Food from the Ground".
  • Published: 2007
  • Publisher: IWF (Göttingen)
  • Language: Silent film
08:54 Institut für Film und Bild in Wissenschaft und Unterricht, Abteilung Hochschule und Forschung (Göttingen) Silent film 1950

Beutefang bei der Kreuzspinne

Catching as the sum of single stimuli and reactions following an internal automatism: approaching the prey (vibrational stimulus), touching with its palps (tactile stimulus), spinning, biting (chemical stimulus), removal from the web and transport to the look-out. Different experiments on stimulus analysis.
  • Published: 1950
  • Publisher: Institut für Film und Bild in Wissenschaft und Unterricht, Abteilung Hochschule und Forschung (Göttingen)
  • Language: Silent film
11:14 IWF (Göttingen) German 1981

Mechanismus des Luftwechsels bei Labyrinthfischen

How labyrinthine fish breathe air using 3 examples; Ctenopoma kingsleyae, Osphronemus gouramy and Anabas testudineus. Dissection and demonstration of breathing in real-time and slow-motion film. Description of the breathing mechanisms using X-ray cinematography and animations.
  • Published: 1981
  • Publisher: IWF (Göttingen)
  • Language: German
04:27 Institut für Film und Bild in Wissenschaft und Unterricht, Abteilung Hochschule und Forschung (Göttingen) Silent film 1950

Orientierungsvermögen bei der Kreuzspinne

Orientation of the garden spider by means of gravitational direction. Experiments on the retrieval of the web centre after return from the periphery. Experimental proof of memory assistance in catching.
  • Published: 1950
  • Publisher: Institut für Film und Bild in Wissenschaft und Unterricht, Abteilung Hochschule und Forschung (Göttingen)
  • Language: Silent film
07:38 IWF (Göttingen) Silent film 1965

Tilapia heudeloti (Cichlidae) - Balz

Senegal cichlid. Female performing the courtship display: impressing, tail beating, "bowing" before the congener. The male stays with the female digging the spawning ground. Both partners in preparation of spawning.
  • Published: 1965
  • Publisher: IWF (Göttingen)
  • Language: Silent film
19:32 IWF (Göttingen) German 1999

Polarität bei Pflanzen

Polarity is a basic phenomenon in plants. Induction of polarity by blue light is demonstrated on cellular level in side branch formation of the alga Vaucheria (Siphonales) and in the germination of the spermatized eggs of the brown alga Pelvetia. Polarity, once established in a cell persists during the whole lifetime of a plant. Expression of polarity is illustrated in roots and in under water leaves of higher plants; in the case of the leave it is characterized by the flux of protons from under to upper side. The influence of proton flow in leave and root is molecularly visualised using computer animations.
  • Published: 1999
  • Publisher: IWF (Göttingen)
  • Language: German
01:25 IWF (Göttingen) German 2006

Gefrierbruch-Technik

Elektronenmikroskopisches Bild einer Gap junction im Gefrierbruch. Animation zum Aufbau einer Gap junction und zur Technik des Gefrierbruchs am Beispiel von Gap junctions. Aus der CD-ROM: BEREITER-HAHN, JÜRGEN; WINFRIED S. PETERS (Frankfurt a. M.). Die Zelle III - Innere Grenzen - Membranen und Transport. (C 7102)
  • Published: 2006
  • Publisher: IWF (Göttingen)
  • Language: German
01:20 IWF (Göttingen) German 2006

Entstehung und Formvariabilität von Erythrozyten

Rote Blutkörperchen in einer Suspension. Blutfluss durch eine Kapillare in 8-facher Zeitdehnung, daher sind die Erythrozyten gut sichtbar. Trickdarstellung zur Entwicklung von Erythrozyten aus Stammzellen im Knochenmark. Verformung der roten Blutkörperchen in einem arteriellen Gefäß. Aus der CD-ROM: BEREITER-HAHN, JÜRGEN; WINFRIED S. PETERS (Frankfurt a. M.). Die Zelle III - Innere Grenzen - Membranen und Transport. (C 7102)
  • Published: 2006
  • Publisher: IWF (Göttingen)
  • Language: German
01:29 IWF (Göttingen) English 2006

Deformation of the erythrocyte membrane

Deformation of erythrocytes in the blood stream (arteriole). An animation explains the deformation of the erythrocyte membrane under experimental conditions. Demonstration of membrane deformation using reflection microscopy. From the CD-ROM: BEREITER-HAHN, JÜRGEN; WINFRIED S. PETERS (Frankfurt a. M.). The Cell III - Inner Boundaries - Membranes and Transport (C 7102)
  • Published: 2006
  • Publisher: IWF (Göttingen)
  • Language: English
26:16 IWF (Göttingen) English 1995

Laser Microbeam and Optical Tweezers - Physical Principles. Applications in Cell Biology and Biotechnology

With the aid of laser beams (UV and IR) which can be coupled with the light path of an optical microscope, objects such as cells can be more gently manipulated without mechanical contact. The UV laser (laser microbeam) serves to cut and drill, the IR laser (optical tweezers) to hold and move particles. The film explains the method and shows practical examples. (Micro, real-life and animation sequences).
  • Published: 1995
  • Publisher: IWF (Göttingen)
  • Language: English
00:31 IWF (Göttingen) English 2005

Microbodies

Granules in the cytoplasmic streaming in the rhizoids of the green alga Chara. Endothelial cell in culture (electron microscopy). From the CD-ROM: BEREITER-HAHN, JÜRGEN (Frankfurt a. M.). The Cell I - Life from Light and Air (C 7100)
  • Published: 2005
  • Publisher: IWF (Göttingen)
  • Language: English
11:39 IWF (Göttingen) German 1978

Entwicklung von Ectocarpus siliculosus (Phaeophyta)

Vegetative Vermehrung und Generationswechsel der Braunalge unter Laborbedingungen: Bildung plurilokulärer Sporangien, Freisetzung und Keimung von Mitosporen, aufwachsende Sporophyten; Bildung unilokulärer Sporangien, Freisetzung und Keimung von Meiosporen, Bildung plurilokulärer Gametangien, Freisetzung und Kopulation von Gameten. Mikrokinematographische Aufnahmen, z. T. Zeitraffung, Schemata des Entwicklungsgangs.
  • Published: 1978
  • Publisher: IWF (Göttingen)
  • Language: German
08:44 IWF (Göttingen) English 1982

Hormone Effects in Sexual Reproduction of Brown Algae

Attached female Ectocarpus gametes attract the male gametes with the pheromone ectocarpen, which they release into the sea water. Mature Laminaria egg cells effect the release of their pheromone. With high-speed, time-lapse and animated sequences.
  • Published: 1982
  • Publisher: IWF (Göttingen)
  • Language: English
13:40 IWF (Göttingen) English 1991

Fertilization Biology in Fucus (Phaeophyceae) - Dioecism and Moecism

While the dioecious brown alga Fucus serratus releases its sexual products in two phases - gametangia at outgoing tide and gametes at incoming tide - the monoecious species Fucus spiralis releases gametangia and gametes with the incoming tide. The monoecious species releases fertilized egg cells; in the dioecious species, the gametes must find each other on the sea floor. Biotope photography, partially with time-lapse.
  • Published: 1991
  • Publisher: IWF (Göttingen)
  • Language: English
04:13 IWF (Göttingen) English 1976

Electron Microscopic Preparation Techniques - 3. Negative Staining

Negative staining a biological specimen with uranyl acetate. Floating a carbon carrier film on specimen suspension. Specimen particles are adsorbed to its underside, washing the adsorbed particles by floating the film on water, negatively staining them by floating the carrier film on aqueous uranyl acetate solution.
  • Published: 1976
  • Publisher: IWF (Göttingen)
  • Language: English
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