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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
13:42 IWF (Göttingen) German 1991

Befruchtungsbiologie bei Fucus (Phaeophyceae) - Diözie und Monözie

Während die diözische Braunalge Fucus serratus ihre Geschlechtsprodukte in zwei Phasen abgibt - Gametangien bei Niedrigwasser, Gameten bei auflaufendem Wasser - , entläßt die monözische Art Fucus spiralis Gametangien und Gameten bei auflaufendem Wasser. Die monözische Art entläßt befruchtete Eizellen, die diözische Art ist auf eine Gametenfindung am Meeresboden angewiesen. Biotopaufnahmen; z. T. in Zeitraffung.
  • Published: 1991
  • Publisher: IWF (Göttingen)
  • Language: German
Offline Collection IWF (Göttingen) German 1991

Prüfung der Farbsehtüchtigkeit

Approximately 10 percent of the male population have colour vision that deviates from the "'normal' trichromats" (in the sense of Young-Helmholtz's Three Colour Theory") and exhibit congenital disturbances in the red-green region. - Their types and their heredity - Testing procedures Psuedo-isochromatic tables and alternatively pairs of colour samples are appropriate for screening tests. Nagel's anomalscope, which was conceived as a spectral colour mixing device, is available for the differential diagnosis of the disturbances in the red-green region and the exact determination of its degree of Expression. The Farnsworth-Munsel 100 Hue Test, a sorting procedure, allows the determination of particularly good colour differentiates within the group of the colour discriminators.
  • Published: 1991
  • Publisher: IWF (Göttingen)
  • Language: German
Offline Collection Gesellschaft für den Kulturwissenschaftlichen Film (Göttingen) ; Seminar für Volkskunde (Göttingen) German 1991

Scherbenlese im Grenzgebiet

The film introduces farmer families who were dispossessed of their land in the former GDR. Today it provides no perspective since the situation in agriculture massively changed. There's only time to clean up the shards for the successors.
  • Published: 1991
  • Publisher: Gesellschaft für den Kulturwissenschaftlichen Film (Göttingen) ; Seminar für Volkskunde (Göttingen)
  • Language: German
42:10 IWF (Göttingen) German 1991

Quantenmechanik im Aufbruch - Friedrich Hund berichtet aus seinem Leben, Göttingen 1988 - Gesprächspartner: Helmut Rechenberg

Student in Marburg and Göttingen: meetings with Debye, Courant, Nelson, Nohl, Born, Bohr, Sommerfeld, Heisenberg, Ehrenfest, Landé, Franck, Hilbert. First publications: "Ablenkung von freien langsamen Elektronen in Atomen" (Deflection of Free Slow Electrons in Atoms), "Die Gestalt mehratomiger polarer Molekeln. I" (The shape of Many-atom Polar Molecules): The "Göttinger Quantenmechanik" (Göttingen Quantum Mechanics) by Heisenberg, Born and Jordan. Postdoctoral university teaching qualification 1925: "Hund's Rule". The Schrödinger Equation 1926 as the key to understanding the molecule. Copenhagen 1926/27: Heisenberg's Uncertainty Relation. First meeting with Mulliken. Harvard University 1929: nomenclature of the molecule, Hund-Mulliken molecule theory. Professor in Leipzig 1929: theory of chemical bonding. Meeting with Bloch (metal conduction), Teller (molecule), and Peierls (crystal lattice electrons). Inspiration by Höpke, Weizsäcker, and Bonhoeffer. "Rote Hunde" (red dogs) textbook author. Postwar work at the universities of Jena, Frankfurt/Main, and Göttingen. Research on electrons in crystals. After being made Emeritus in 1964, contributions to the history of quantum theory and general physics.
  • Published: 1991
  • Publisher: IWF (Göttingen)
  • Language: German
11:51 IWF (Göttingen) English 1991

Friedrich Hund: Reminiscences of Robert S. Mulliken, Göttingen 1988

The inaugurative Robert S. Mulliken-Lecture at the University of Chicago, 1988. Parallels between the biographies of Mulliken and Hund, early research, personal and scientific contact since Mullikens Göttingen days in 1927. The early days of molecular spectroscopy: Mullikens experimental approach and Hunds theoretical. Their meeting in the USA in 1929 and their "Agreement about representing molecular states". Reminiscences of their meeting in Heidelberg 1930. (With personal photos.)
  • Published: 1991
  • Publisher: IWF (Göttingen)
  • Language: English
20:33 IWF (Göttingen) English 1991

Artificial Insemination of Pigs

Conditions needed for breeding male pigs. Techniques for collecting semen. Macro- and microscopic evaluation of ejaculate. Demonstration of pathological deviations in sperm cells. Dilution of sperm. Processing and identification of aliquots. Deep freeze, insemination, gestation.
  • Published: 1991
  • Publisher: IWF (Göttingen)
  • Language: English
20:33 IWF (Göttingen) German 1991

Künstliche Besamung beim Schwein

Conditions needed for breeding male pigs. Techniques for collecting semen. Macro- and microscopic evaluation of ejaculate. Demonstration of pathological deviations in sperm cells. Dilution of sperm. Processing and identification of aliquots. Deep freeze, insemination, gestation.
  • Published: 1991
  • Publisher: IWF (Göttingen)
  • Language: German
15:06 IWF (Göttingen) English 1991

Breakdown of Pulsating Water Jets

Interaction of running-time effects and surface tension (Rayleigh instability) in a fluid beam with velocity modulation. Basic velocities: 4 m/s and 2 m/s; jet diameter: 3.2 mm or 5 mm; disturbance amplitudes: 0 to 5 %. Pressure chamber with pulsator, pressure probe, and anemometer. Decay in drops. Slow motion photography (20-200 Hz) with synchronous stroboscopic illumination. Overlap effects. In a horizontal beam: bead chains and umbrellas. In a vertical beam: crowns, bottles, and bubbles.
  • Published: 1991
  • Publisher: IWF (Göttingen)
  • Language: English
15:04 IWF (Göttingen) German 1991

Zerfall pulsierender Wasserstrahlen

Wechselwirkung von Laufzeiteffekten und Oberflächenspannung (Rayleigh-Instabilität) in einem Flüssigkeitsstrahl mit Geschwindigkeitsmodulation. Grundgeschwindigkeiten: 4 m/s und 2 m/s; Düsendurchmesser: 3,2 mm bzw. 5 mm; Störamplituden: 0 bis 5 %. Druckkammer mit Pulsator, Drucksonde und Anemometer. Zerfall in Tropfen. Zeitdehneraufnahmen (20-200 Hz) mit synchroner stroboskopischer Beleuchtung. Überholeffekte. Im horizontalen Strahl: Perlenketten und Schirme. Im vertikalen Strahl: Kronen, Flaschen und Blasen.
  • Published: 1991
  • Publisher: IWF (Göttingen)
  • Language: German
Offline Collection IWF (Göttingen) German 1991

Nagybörzsöny - Ein deutsches Dorf in Ungarn

Nagybörzsöny/German Pilsen is located the north of Budapest and is considered to be a German settlement. German miners have mined gold and silver there since the 13th century. After mining was abandoned in the 18th century and decline of viniculture in the 19th century, the village fell into economic isolation. After World War II the use of the German language declined. The film shows buildings from the former wine-growing culture, the churches, the two local history museums, a charcoal plant in the forest, and then proceeds to language use and to the problems of the German mother tongue via discussions and reminiscences. Organised cultivation of this tradition is presented in scenes on a rehearsal of the women's choir and of the German dance group.
  • Published: 1991
  • Publisher: IWF (Göttingen)
  • Language: German
35:04 IWF (Göttingen) German 1991

Finkenmanöver im West-Harz

In seven towns of the Western Harz mountains annual finch-singing competitions are held using tame birds. They are around Easter and this film shows the competition from 1989 in St. Andreasberg as well as excerpts from how to keep and train a finch.
  • Published: 1991
  • Publisher: IWF (Göttingen)
  • Language: German
Offline Collection IWF (Göttingen) English 1991

Nuba Wrestling

Documentation of nubian wrestling in the area of Khartum, Sudan. Besides the competition organization, some wrestlers and club officials are shown in their everyday life. An identity conflict between the team is shown together with the resolution the following friday.
  • Published: 1991
  • Publisher: IWF (Göttingen)
  • Language: English
1:21:45 IWF (Göttingen) Original sound, no spoken text 1991

Mitteleuropa, Schleswig - Anfertigung eines Wagenrades

The film shows the different stages in the manufacture of a large cart-wheel and the special tools used by the wheel-wright: turning the hub, shaping the spokes and the felloes, assembling the wheel, drilling the hub, and finally the placing of the tire and the bushes by the blacksmith.
  • Published: 1991
  • Publisher: IWF (Göttingen)
  • Language: Original sound, no spoken text
16:07 IWF (Göttingen) German 1991

Entwicklungsbiologie der Mehlmotte Ephestia kuehniella

Introductory the film presents the external morphology of the adult moth. The newly hatched adults display a characteristic mating behaviour which initiates copulation and egg deposition. Embryonic development lasts about 4 1/2 days (at 23°C). The post-embryonic life includes 5-6 larval instars (altogether 40-45 days), the pupal phase (about 11 days) and relatively short imaginal stage. Larvae live within their food. The last instar larva leaves the food and spins a cocoon, within which the immobilized prepupa enters the pupal molt. During pupal time the development of imaginal traits can externally be traced chiefly by pigmentation processes. Finally the cuticle breaks and the imago leaves the pupal case. After the wings are inflated (by hemolymph), stretched, and hardened, the moth is ready to fly.
  • Published: 1991
  • Publisher: IWF (Göttingen)
  • Language: German
Offline Collection IWF (Göttingen) German 1991

Lebensweise von Ameisenlöwe und Ameisenjungfer (Euroleon nostras)

Locomotion of larvae in and upon substrate. Exploratory wandering and preparation of the conical trap. Predation using sand, seizing and shaking prey. Removal of remains and foreign bodies from the trap. Spreading wings and flight in outdoor and laboratory conditions.
  • Published: 1991
  • Publisher: IWF (Göttingen)
  • Language: German
Offline Collection IWF (Göttingen) German 1991

Dreidimensionale Wirbelströmungen hinter Zylindern mit Endscheiben - Rauchdrahtmethode

Making currents visible by means of the smoke-wire method. Two vortex frequencies behind a cylinder are made simultaneously visible using stroboscopic lighting. Different length-diameter ratios (l/d) are observed, and the three-dimensional behaviour of the current field is shown. All takes are in slow motion.
  • Published: 1991
  • Publisher: IWF (Göttingen)
  • Language: German
Offline Collection IWF (Göttingen) German 1991

Deutsch oder Ungarisch? - Vecsés, Ein Dorf bei Budapest

The planting, processing and marketing of cabbage has made the village Vecsés well-known as comfortably-off. The film frames the question as to the identity of the villagers - and includes various everyday situations: making sauerkraut, market day in Budapest, wine-making, the collective as the centre of economy and culture, traditional dances, German lessons at school and German weddings. Interviews.
  • Published: 1991
  • Publisher: IWF (Göttingen)
  • Language: German
31:27 IWF (Göttingen) German 1991

Ebrû - Türkisches Marmorpapier

Nach kurzem historischen Abriß zeigt die Ebrû-Künstlerin Azade Akar aus Istanbul die Entstehung überlieferter türkischer Marmorpapier-Muster. Blätter der Künstler Mustafa Düzgünman und Niyazi Sayin ermöglichen einen Vergleich. Vorbereitung des Schleimgrundes aus Tragant-Gummi in einer flachen, rechteckigen Wanne, Vorstellung von Farben und Gerät. Bei der Technik des Marmorierens, einem Tunkverfahren, werden auf den gallertartigen Marmoriergrund mit Wasser angemischte Pigmentfarben aufgespritzt oder aufgetropft. Eine Zugabe von Ochsengalle bewirkt, daß sich die Farben auf der Oberfläche ausbreiten und sich weder untereinander noch mit dem Schleimgrund vermischen. Mit Nadeln oder Kämmen werden sie in bestimmte Formen gezogen und schließlich auf ein darübergelegtes Papier übertragen, mit dem sie vom Grund abgehoben werden.
  • Published: 1991
  • Publisher: IWF (Göttingen)
  • Language: German
Offline Collection IWF (Göttingen) English 1991

Weavers in Ahuiran - Michoacán, Mexico

White kerchiefs and dark blue rebozos, made on belt looms, are the main products of the weavers of Ahuiran. Especially during the absence of their husbands, the weavers are dependent on weaving for their income, which has led to the introduction of cheap acrylic wool, helping their sales in the nearby market town of Paracho. The women's work is the social centre of the community and includes their daughters. Thus traditions are passed on.
  • Published: 1991
  • Publisher: IWF (Göttingen)
  • Language: English
Offline Collection IWF (Göttingen) German 1991

Weberinnen in Ahuiran - Michoacán, Mexiko

Die Weberinnen von Ahuiran stellen mit Rückengürtelwebgeräten schwarzblaue Rebozos und weiße Tücher her. Besonders wenn die Ehemänner abwesend sind, sind sie auf den Verdienst aus ihrem Handwerk angewiesen. Die finanzielle Lage der Weberinnen wie auch der Käuferinnen führte dazu, daß statt der Baumwolle immer mehr Acrylwolle benutzt wird. Die Frauen arbeiten oft in Gemeinschaft und unterhalten sich dabei. Sie nehmen die Hilfe ihrer Töchter in Anspruch, die so das Handwerk nach und nach erlernen. Verkauft werden die Rebozos in dem nahen Marktort Paracho.
  • Published: 1991
  • Publisher: IWF (Göttingen)
  • Language: German
31:28 IWF (Göttingen) English 1991

Ebrû - Turkish Marbled Paper

The Ebrû-maker Azade Akar from Istanbul shows the making of turkish Marbled paper designs and comparison with those of the artists Mustafa Düzgünman and Niyazi Sayin. Preparation of a sticky background of Tragant rubber in a shallow rectangular bath, introduction to colours and instruments, dipping technique, including using bovine gall so that the colours spread over the water surface but mix neither with each other nor with the background. Finally they are gathered with a comb or needles and transferred to a paper overlay.
  • Published: 1991
  • Publisher: IWF (Göttingen)
  • Language: English
05:52 IWF (Göttingen) German 1991

Raumkonkurrenz bei der Prachtlibelle Calopteryx haemorrhoidalis

The film shows the spatial distribution and the behaviour of the Mediterranean demoiselle Calopteryx haemorrhoidalis on typical reproduction waters. The great importance of suitable perches becomes obvious. These perches, e. g. single rush stems, are used by immature, hunting individuals as well as by reproductive males that are controlling territories from these sites. The latter chase all other individuals, the result being a spatial segregation between immature and reproductive specimens during the day. Typical behaviour, such as threatening, courting, copulation, and oviposition is shown in different film speeds.
  • Published: 1991
  • Publisher: IWF (Göttingen)
  • Language: German
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AV-Portal 3.8.0 (dec2fe8b0ce2e718d55d6f23ab68f0b2424a1f3f)