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05:42 IWF (Göttingen) English 1977

Structure of the Blood Vessels and Circulation of Blood in the Glomus caroticum of the Cat

Some passages of the dye Lissamin green: fluorscent shots. The cat carotid body is a chemoreceptor which measures the partial pressures of oxygen and carbon dioxide, and pH values in blood plasma. This organ seperates the corpuscles from the serum so that the receptors measure only values of plasma. Morphology and function are shown.
  • Published: 1977
  • Publisher: IWF (Göttingen)
  • Language: English
05:42 IWF (Göttingen) German 1977

Durchblutung und Gefäßaufbau des Glomus caroticum der Katze

Lissamingrün-Passagen. Fluoreszenzaufnahmen. Glomus caroticum ist ein Chemorezeptor, welcher im Blutplasma Sauerstoff- und Kohlensäuredruck und den pH-Wert mißt. Das Organ hat Trennfunktion zwischen korpuskulären Anteilen des Blutes und dem Serum. Morphologie und Funktion werden gezeigt. Mit Trick.
  • Published: 1977
  • Publisher: IWF (Göttingen)
  • Language: German
02:59 IWF (Göttingen) Silent film 1977

Cricetus cricetus (Muridae) - Eintragen von Nahrung und Nistmaterial

The film demonstrates the behaviour of the hamster Cricetus cricetus when carrying food and nestmaterial. Hamsters innately collect and store food. Food is stuffed into the check-pouches with characteristic movements of the paws and transported to the burrow. Then it is stored in special store rooms within the burrow. Nesting material is transported with the mouth to the sleeping corner; it serves for wadding the nest and as a protection against the cold during hibernation.
  • Published: 1977
  • Publisher: IWF (Göttingen)
  • Language: Silent film
01:38 IWF (Göttingen) Silent film 1977

Jynx torquilla (Picidae) - Nahrungserwerb, Funktion der Zunge

The wryneck pecks first at living ants and swallows subsequently inaccessible ant pupae, which he searchs out and captures with the aid of his long wormlike, glutinous, tongue.
  • Published: 1977
  • Publisher: IWF (Göttingen)
  • Language: Silent film
03:24 IWF (Göttingen) Silent film 1977

Dryocopus martius (Picidae) - Füttern kleiner Jungvögel

A black woodpecker climbs to its nest hole. Unfeathered young lie in the open hole which the parent bird touches with the beak until these make searching movements with stretched necks and opened beaks. They are then fed and brooded, until the other parent appears to start feeding.
  • Published: 1977
  • Publisher: IWF (Göttingen)
  • Language: Silent film
06:41 IWF (Göttingen) Silent film 1977

Otis tarda (Otididae) - Balzverhalten

Courtship behaviour of the Great Bustard Otis tarda. Male and female of this species differ in size. This exterior sexual dimorphism is emphasized by the male by presenting the light coloured underside of his wings and by blowing up the sack of the throat. In this position the male performes his courtship dance in front of a female.
  • Published: 1977
  • Publisher: IWF (Göttingen)
  • Language: Silent film
02:38 IWF (Göttingen) Silent film 1977

Philomachus pugnax (Scolopacidae) - Arenabalz (Freilandaufnahmen)

Courtship behaviour of Ruff and Reeve Philomachus pugnax. Male and female are sexually dimorph and never establish any pair bond between them. During the breeding season small troups of males occupy a common courtship territory; within this common territory each male defends a small area against other males. By presenting themselves males try to attract females. In contrast to the males, females are coloured inconspicuously. They visite the territories of the males only for mating.
  • Published: 1977
  • Publisher: IWF (Göttingen)
  • Language: Silent film
04:13 IWF (Göttingen) Silent film 1977

Sciurus vulgaris (Sciuridae) - Nahrungserwerb

The film documents the behaviour of squirrels Sciurus vulgaris when searching and eating food. Animals are shown when eating buts, cones, bark and eggs.
  • Published: 1977
  • Publisher: IWF (Göttingen)
  • Language: Silent film
01:39 IWF (Göttingen) Silent film 1977

Sciurus vulgaris (Sciuridae) - Bündeln und Eintragen von Nistmaterial

The film documents the behaviour of the squirrel Sciurus vulgaris when collecting and carrying nestmaterial. Within their territories squirrels construct nests made e. g. from shreded bast and gras. The material is collected with the paws and pushed into the mouth. For easier transport the material is shaped to a ball.
  • Published: 1977
  • Publisher: IWF (Göttingen)
  • Language: Silent film
01:50 IWF (Göttingen) Silent film 1977

Picus viridis (Picidae) - Nahrungserwerb, Funktion der Zunge

A woodpecker, still immaturely feathered, pecks at rotten wood. At a sidways opened decayed stump one sees how the wormlike tongue penetrates and after feeling ant pupae, "glues" these and withdraws.
  • Published: 1977
  • Publisher: IWF (Göttingen)
  • Language: Silent film
01:39 IWF (Göttingen) Silent film 1977

Sciurus vulgaris (Sciuridae) - Jungentransport

The film presents the behaviour of the squirrel Sciurus vulgaris when transporting the young. Females grasp a young by either the belly, the back or by a leg and handle it with similar movements as if handling nesting material.
  • Published: 1977
  • Publisher: IWF (Göttingen)
  • Language: Silent film
17:13 IWF (Göttingen) German 1977

Aufbau und Funktion des Skelettmuskels

A single muscle cell is dissected out of the m. semitendinosus from the frog's leg. Demonstration of the threshold stimulus and response behaviour, two single contractions superimposed on one another and a tetanus, experimental determination of the length-force relationship and the relationship between speed of contraction and load.
  • Published: 1977
  • Publisher: IWF (Göttingen)
  • Language: German
05:47 IWF (Göttingen) German 1977

Präparation einer einzelnen Skelettmuskelzelle

A single fibre from a frog semiteninosus muscle is dissected in a special dissection dish. The main stages of this procedure are as follows: about 2/3 of the fibres are cut off by using fine scissors, the connective tissue in the remaining part of the preparation is made loose by stretching and pulling, the preparation is subdivided in small fibre bundles, one bundle is chosen for final dissection, and the single fibre is isolated from its last fellow fibres. Finally, the isolated fibre is tested for all-or-nothing twitches.
  • Published: 1977
  • Publisher: IWF (Göttingen)
  • Language: German
10:03 IWF (Göttingen) German 1977

Zerspanen metallischer Werkstoffe - Aufbauschneidenbildung

Mikrokinematographische Aufnahmen. Zeitdehneraufnahmen bis 7000 B/s. Aufbauschneidenbildung bei der Spanentstehung im polierten und geätzten Gefüge von Stahl C 45, Stahl 100 Cr 6 und Stahl 16 MnCr 5. Form, Größe und Stabilität von Aufbauschneiden als Ergebnis von Verformung, Verfestigung und Einfluß der Zerspanungstemperatur bei Veränderung der Schneidengeometrie und der Schnittgeschwindigkeit. Teilweise enthalten in den Filmen E 1622, E 1934, E 1983, E 1952.
  • Published: 1977
  • Publisher: IWF (Göttingen)
  • Language: German
Offline Collection IWF (Göttingen) German 1977

Fortpflanzung der Rädertiere (Rotatoria)

First, the organization of a rotifer (Epiphanes senta) is shown. The Seisonidea (Seison annulatus) reproduce by fertilized eggs, only. In the Monogononta (Brachionus urceolaris, Asplanchna girodi), both parthenogenesis and bisexual reproduction occur: amictic females, amictic egs; mictic females, hatching and organization of dwarf males, copulation, dormant eggs. In the Bdelloidea (Philodina citrina) males are absent. Reproduction is exclusively parthenogenesis.
  • Published: 1977
  • Publisher: IWF (Göttingen)
  • Language: German
11:33 IWF (Göttingen) German 1977

Reizbewegungen bei Blütenorganen

Movements induced by turgor pressure in stigmata of monkey flower (Mimulus), ader tongue (Proboscidea), and in filaments of rock rose (Helianthemum), oregon grape (Mahonia) and knapweed (Centaurea). Includes time lapse.
  • Published: 1977
  • Publisher: IWF (Göttingen)
  • Language: German
01:10 IWF (Göttingen) Silent film 1977

Transport der Lymphe - Lymphgefäße

Each lymphatic vessel consists of serial valve segments. The constriction of one segment pumps the lymph into the next one. The valves prevent reflux.
  • Published: 1977
  • Publisher: IWF (Göttingen)
  • Language: Silent film
00:42 IWF (Göttingen) Silent film 1977

Funktion der Taschenklappen - Lymphgefäße

The valves open and close 6 to 12 times per minute. The contraction in the serial segments is coordinated, moving from peripheral to central areas.
  • Published: 1977
  • Publisher: IWF (Göttingen)
  • Language: Silent film
02:01 IWF (Göttingen) Silent film 1977

Emigration - Leukozyten

A neutrophil granulocyte fixed at the vessel wall: the cytoplasm is pushed forward into the tissue. Nuclear segments jam themselves through tissue gap. Finally the cell expands in the tissue.
  • Published: 1977
  • Publisher: IWF (Göttingen)
  • Language: Silent film
01:51 IWF (Göttingen) Silent film 1977

Degeneration - Neutrophiler Granulozyt

In the film, surviving neutrophil granulocytes from peripheral human blood is examined in a cover glass preparation. The development of cell migration at this stage, phagocytosis of different types of bacterium and the effect of increased temperatures on the behaviour of cell are shown. Finally the degeneration of the cells is demonstrated.
  • Published: 1977
  • Publisher: IWF (Göttingen)
  • Language: Silent film
12:46 IWF (Göttingen) German 1977

Zerspanen metallischer Werkstoffe - Spanentstehung

Mikrokinematographische Aufnahmen. Spanentstehung (Fließspan, Scherspan, Reißspan) im polierten und geätzten Gefüge von Stahl C 45, Stahl 9 S 20, Aluminiumlegierung AlCuMgPb und Gußeisen GG 20 beim Einsatz von Schnittwerkzeugen mit verschiedener Schneidengeometrie (Spanwinkel und Schneidenrundung). Scherverformung, Scherebene, Fließschicht. Teilweise enthalten in den Filmen E 1527, E 1621, E 1814, E 1951 bis E 1953, E 1994.
  • Published: 1977
  • Publisher: IWF (Göttingen)
  • Language: German
12:46 IWF (Göttingen) English 1977

Metal Cutting - Chip Formation; Cutting in Microstructure

Microcinematographic shots. Chip formation (flow chips, shear chips, tear chips) in polished and etched structures of steel C 45, steel 9 S 20, aluminium alloy AlCuMgPb and cast iron GG 20 during the cutting process with cutting tools of differing cutting wedges (rake angle and rounded edge). Shear deformation, shear plane, flow zone.
  • Published: 1977
  • Publisher: IWF (Göttingen)
  • Language: English
10:04 IWF (Göttingen) English 1977

Metal Cutting - Built-up Edge Formation; Cutting in Microstructure

Microcinematographic shots. Slow-motion pictures of an original frequency up to 7000 f/s. Built-up edge formation during chip build-up in the polished and etched structure of steel C 45, steel 100 Cr 6, and steel 16 MnCr 5. Form, size, and stability of built-up edges as a result of deformation, strainhardening and cutting temperature during changes of the cutting geometry and cutting speed.
  • Published: 1977
  • Publisher: IWF (Göttingen)
  • Language: English
06:57 IWF (Göttingen) German 1977

Flüssige Kristalle - Thermisch und elektrisch induzierte Texturänderungen bei cholesterischen Phasen

Mikroskopische Aufnahmen bei Mischungen aus Cholesterin-Chlorid und Cholesterin-Laurat. Cholesterische Phasen mit charakteristischen Mustern ("Fingerprint"-Struktur), die in typische nematische Fadentexturen übergehen.
  • Published: 1977
  • Publisher: IWF (Göttingen)
  • Language: German
06:38 IWF (Göttingen) German 1977

Flüssige Kristalle - Elektrisch induzierte Texturänderungen bei nematischen Phasen

Übergang bei drei Schwellenspannungen (Umwandlungsfeldstärken) a) zu streifenartiger Domänenstruktur hoher Symmetrie (Williamsdomänen), b) in eine noch regelmäßige Domänenstruktur niedriger Symmetrie (Zerfall der Streifen) und c) in die völlig turbulente Phase (dynamische Streuung). Wechselwirkung zwischen Disklinationslinien (Defekte der Molekülorientierung) nach Abschalten des elektrischen Feldes.
  • Published: 1977
  • Publisher: IWF (Göttingen)
  • Language: German
06:38 IWF (Göttingen) English 1977

Liquid Crystals - Electrically Induced Alterations in Texture during Nematic Phases

Transition at three threshold voltages (transition field strengths) to a) a band-like domain pattern of high symmetry (Williams-domains), b) a still regular domain structure of lower symmetry (decomposition of the bands), and c) a completely turbulent state (dynamic scattering regime). Interaction between disclination lines (defects in molecular orientation) after switching off the electric field.
  • Published: 1977
  • Publisher: IWF (Göttingen)
  • Language: English
06:58 IWF (Göttingen) English 1977

Liquid Crystals - Thermally and Electrically Induced Textural Changes in Cholesteric Phases

Microscopic shots in mixtures of cholesterinechloride and cholesterine-laurate. Cholesteric phases with characteristic patterns ("Fingerprint"-structure), that develop into typical nematic thread structure.
  • Published: 1977
  • Publisher: IWF (Göttingen)
  • Language: English
11:34 IWF (Göttingen) German 1977

Verhalten und Nahrungskonkurrenz europäischer Geierarten am Aas

Vultures were observed and filmed at displayd carcasses in Spain (Extremadura and Andalusia), whereby special attention was paid to their behaviour and way of feeding. The three observed species (Griffon, Black and Egyptian vultures) each belong to a different feeding type: Griffon vultures (Gyps fulvus) belong to the tugging-tearing, Black vultures (Aegypius monachus) to the tearing and Egyptian vultures (Neophron percnopterus) to the pecking type.
  • Published: 1977
  • Publisher: IWF (Göttingen)
  • Language: German
06:30 IWF (Göttingen) Silent film 1977

Heterohyrax brucei (Procaviidae) - Fortbewegung im Geäst und Nahrungsaufnahme (Freilandaufnahmen)

The prime food source of the bush hyrax Heterohyrax brucei is bush and tree foliage, both in wet and dry seasons; to reach it the animals must sometimes climb vertical trunks and balance on thin branches, avoiding thorns. Supplementary foods are flowers and seeds when available, and grass in the rainy season. The leaves are bitten off with the molars and chewed. Twigs are reached for and held with mouth and forelegs.
  • Published: 1977
  • Publisher: IWF (Göttingen)
  • Language: Silent film
15:08 IWF (Göttingen) German 1977

Mitose - Karyo- und Cytokinese bei tierischen und pflanzlichen Zellen

Comprehensive fundamental demonstration with animation sequences as exemplified in animal and plant cells. The clawed toad (Xenopus laevis): tissue culture cells from the tadpole heart; the blood lily (Haemanthus katharinae): endosperm cells devoid of cell walls; the spiderwort (Tradescantia virginiana): anther filaments. Phase contrast, interference contrast, time-lapse.
  • Published: 1977
  • Publisher: IWF (Göttingen)
  • Language: German
08:55 IWF (Göttingen) Silent film 1977

Necrophorus vespillo (Silphidae) - Larvenentwicklung und Brutpflege

Development of the larvae in the beetle Necrophorus vespillo, starting with the hatching from the egg and ending at the last larval stage before becoming a pupa. In the course of their three stages the larvae eat the corpse of a small animal which had been previously prepared in the earth by the adult beetles. The film shows both the growth of the larvae and their behaviour. One can observe repeatedly how the adult animals feed their offspring.
  • Published: 1977
  • Publisher: IWF (Göttingen)
  • Language: Silent film
10:08 IWF (Göttingen) Silent film 1977

Necrophorus vespillo (Silphidae) - Häutung zur Imago

The film shows the imaginal hatching of the silphid beetle Necrophorus vespillo from its pupa. It can be observed how the exuvial liquid is gathering below the old exo-sceleton. The mechanism of hatching is shown as well as the stretching of the wings, and part of subsequent scelotisation.
  • Published: 1977
  • Publisher: IWF (Göttingen)
  • Language: Silent film
23:02 IWF (Göttingen) Original sound, no spoken text 1977

Südwest-Europa, Portugal - Kirchfest »Romaria« von S. Joao d'Arga (Minho)

The romaria of S. Joao d'Arga takes place on August 29th. The patron saint is John the Baptiste. In addition to the widespread customs and vows (procession with the carrying of wooden frames, walking round the chapel, offerings, ex votos, rockets, firework, etc.) a dance contest here takes place, too.
  • Published: 1977
  • Publisher: IWF (Göttingen)
  • Language: Original sound, no spoken text
15:08 IWF (Göttingen) English 1977

Mitosis - Karyokinesis and Cytokinesis in Animal and Plant Cells

Comprehensive fundamental demonstration with animation sequences as exemplified in animal and plant cells. The clawed toad (Xenopus laevis): tissue culture cells from the tadpole heart; the blood lily (Haemanthus katharinae): endosperm cells devoid of cell walls; the spiderwort (Tradescantia virginiana): anther filaments. Phase contrast, interference contrast, time-lapse.
  • Published: 1977
  • Publisher: IWF (Göttingen)
  • Language: English
10:53 IWF (Göttingen) German 1977

Ferroelastizität in Antimonoxidjodid Sb[5]O[7]J - Umorientierung von Domänen durch Druck; Thermische Phasentransformation

Crystals of this material can exist in three different orientation states which can be mutually switched into each other by applying an external stress. The various domain patterns observed in polarized light and the domain wall movements are demonstrated. In addition we show the changes in domain pattern upon heating, its disappearance at the transition temperature and its reestablishment upon cooling.
  • Published: 1977
  • Publisher: IWF (Göttingen)
  • Language: German
11:15 IWF (Göttingen) German 1977

Schwebefähre über die Oste, Baujahr 1909, Osten (Land Hadeln)

The transporter bridge Osten, operated as a regular service until 1974, is described. The operation of the ferry is demonstrated, showing as an example the transfer of an agricultural vehicle, the most important technical specifications being givem at the same time. Some necessary maintennance work on the electrically operated drive system on the bogie wagon (trolley) is also shown. This is followed by shots of excursion traffic on a Sunday some three weeks prior to cessation of the ferry service, a bus being also among the vehicles ferried across on that occasion.
  • Published: 1977
  • Publisher: IWF (Göttingen)
  • Language: German
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