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11:11 IWF (Göttingen) German 1998

Renale Mikrozirkulation

With the aid of a model of the hydronephrotic kidney, all the sections of the renal vascular bed - including the glomerular microcirculation - can be demonstrated. The following is shown in detail: Cleaving and preparation of the hydronephrotic kidney; demonstration of vessel courses (in part with dye passages) supplemented by vessel casts; alteration of the vessel lumina after electrical stimulation and pharmaceutical application (angiotensin II); demonstration of the glomerular microcirculation by fluorescently labelled erythrocytes and dextran.
  • Published: 1998
  • Publisher: IWF (Göttingen)
  • Language: German
09:55 IWF (Göttingen) English 1998

Ballistospore Discharge in Basidiomycetes

Violent spore discharge in mushrooms and other basidiomycetes uses the same mechanism: Due to certain morphological and physiological properties of the spore wall, two liquid droplets are formed. When these two droplets coalesce, the surface area of the fusion droplet is reduced, which instantly generates energy utilized in spore discharge. Investigations were made with Itersonilia perplexans, a ubiquitous fungus which is easily grown in culture. The film introduces the organism, shows for the first time the process preceding spore discharge, and presents experiments which clarify the origin of the drops. The processes and physical forces during spore discharge are explained by animation. Includes time-lapse.
  • Published: 1998
  • Publisher: IWF (Göttingen)
  • Language: English
09:55 IWF (Göttingen) German 1998

Abschuß von Ballistosporen bei Basidiomyceten

Alle Ständerpilze, die ihre Sporen abschießen, folgen demselben Mechanismus: Morphologische und physiologische Eigenschaften der Sporenwand bewirken, daß zwei Flüssigkeitstropfen entstehen. Die schlagartige Veränderung der Oberflächen- und Grenzflächenenergie beim Zusammenfluß beider Tropfen wird als Impuls für den Abschuß genutzt. Itersonilia perplexans, ein leicht zu handhabender aquatischer Pilz, dient als Untersuchungsobjekt. Der Film stellt diesen Pilz vor, zeigt erstmals die Vorgänge, die dem Abschuß vorausgehen, und dokumentiert Experimente, welche die Herkunft der Tropfen klären. Ein Trick verdeutlicht die Vorgänge und physikalischen Verhältnisse beim Abschuß. Mit Zeitraffung.
  • Published: 1998
  • Publisher: IWF (Göttingen)
  • Language: German
50:29 IWF (Göttingen) German 1998

"An die Presse stell ich mich nicht" - Traditionelle Töpferei im Osnabrücker Land

The Niehenke potter's workshop in Hasbergen near Osnabrück is the last business operation in western Lower Saxony in which traditional crockery is manufactured. Starting with the workshop's centennial celebration in 1995, its chequered history is told by members of the family themselves. Excursions in two museums in Osnabrück and Hagen a. T. W. allow classification of this business operation in the history of pottery in the Osnabrück region. The different phases of the manufacturing process of a teapot structure the second part of the film, which illustrates the current circumstances of the pottery workshop. This is supplemented by off-camera commentary of the present head of the workshop, Bernd Niehenke.
  • Published: 1998
  • Publisher: IWF (Göttingen)
  • Language: German
Offline Collection IWF (Göttingen) German 1998

Die Alpe lebt - Ornach 1975/1996

The film provides insights into the working day routine of the Alpine dairyman and his helpers on the Ornach Alp (Alpine pasture) above Bolsterland in the Allgäu in 1975. Besides the activities connected with animal husbandry, making butter and cheese are their main tasks. The aspect of landscape protection that is linked to alpine dairy farming is discussed in detail. Comparative pictures from 1996 show what has changed in the region and on the Alp in the last 20 years. Tourism has substantially increased, and the Alpine dairyman's wife now helps in the alpine farm work, which was strictly men's business in the past. Throughout Europe, the standardised regulations for agriculture - but in particular those treating milk hygiene - are making the work on the Alp increasingly less profitable. Thus, the future of Alpine farming in the Allgäu is jeopardised.
  • Published: 1998
  • Publisher: IWF (Göttingen)
  • Language: German
11:56 IWF (Göttingen) English 1998

Experiments on the Flight of the Hummingbird Moth

This diurnal hawksbill moth sucks nectar from blossoms while hovering. In experiments, it can be easily trained to go artificial blossoms with honey water. Finely ground particles of balsa wood are swept along in the air current and mark atmospheric vortices and acceleration. High-speed photography with 2500 and 5000 frames per second.
  • Published: 1998
  • Publisher: IWF (Göttingen)
  • Language: English
11:57 IWF (Göttingen) German 1998

Experimente zum Flug des Taubenschwänzchens

Der tagaktive Schwärmer saugt im Schwebflug Nektar aus Blüten. Im Experiment läßt er sich leicht auf künstliche Blüten mit Honigwasser dressieren. Fein zerriebene Balsaholzteilchen werden im Luftstrom mitgerissen und markieren Luftwirbel und Beschleunigung. Zeitdehneraufnahmen mit 2500 und 5000 Bildern pro Sekunde.
  • Published: 1998
  • Publisher: IWF (Göttingen)
  • Language: German
Offline Collection IWF (Göttingen) English 1998

Destination Samoa - New Zealand Samoans Between Two Cultures

A Cultural Group of the New Zealand Police travels to Western Samoa to perform at the annual Teuila Festival. Two group members of Samoan origin also return to Samoa on this occasion. While Auckland-born Tyrone Laurenson is on one of his visits to see relatives, Michael Alofa, who came to New Zealand with his parents 20 years ago as an eight-year-old, now returns for the first time. Both cases exemplify the split and at the same time double cultural identity of migrants who remain rooted in their Samoan culture, while over the years a new, western-oriented identity in New Zealand emerges.
  • Published: 1998
  • Publisher: IWF (Göttingen)
  • Language: English
18:01 IWF (Göttingen) German 1998

Reifung neutrophiler Granulozyten

The differentiation of living cells from promyelocytes to segmented neutrophils is observed for several days in vitro and portrayed by means of time-lapse, phase-contrast microscopy. Furthermore, granulocyte stages that have been stained and fixed according to Pappenheim, the method also used for medical diagnostic purposes, are presented. A proliferation diagram illustrates the coexistence of maturing and resting granuloblast populations. The majority of these microcinematographic images were made in the sixties. The cover-slip cultures that were specially developed by the author enabled the first long-term observations of human hematopoietic cells using phase-contrast technology, which was very new at that time.
  • Published: 1998
  • Publisher: IWF (Göttingen)
  • Language: German
07:51 IWF (Göttingen) English 1998

Isomorphic Alternation of Generations - Allomyces macrogynus (Chytridiomycetes)

The life cycle of the sub/tropical soil fungus Allomyces macrogynus. Development of the tiny tree-like thalli. The exchange of nuclear phases is tied to alternation of generations, the diploid sporophyte reproduces asexually with planospores, the identical haploid gametophyte forms male and female gametes in unequal sizes. Fertilization is anisogamitous. Simple graphics explain the total cycle.
  • Published: 1998
  • Publisher: IWF (Göttingen)
  • Language: English
07:51 IWF (Göttingen) German 1998

Isomorpher Generationswechsel - Allomyces macrogynus (Chytridiomycetes)

Der Film zeigt den Lebenszyklus von Allomyces macrogynus, einem Bodenpilz der Tropen und Subtropen, der wenige Bruchteile von Millimetern große baumförmige Thalli entwickelt. Der Kernphasenwechsel ist mit einem Generationswechsel verbunden: der diploide Sporophyt pflanzt sich asexuell über Planosporen fort; der haploide, gleichgestaltete Gametophyt bringt ungleich große männliche und weibliche Gameten hervor. Demgemäß ist der Befruchtungsmodus eine Anisogamie. Eine einfache Grafik veranschaulicht die Gesamtentwicklung. Mit Zeitraffung.
  • Published: 1998
  • Publisher: IWF (Göttingen)
  • Language: German
10:44 IWF (Göttingen) English 1998

Reproduction and Development of Blastocladiella emersonii

Dimorphism in the chytridiomycete Blastocladiella emersonii is controlled by environmental factors. After 24 hours under CO2-poor conditions the fungus forms thin-walled, colourless zoosporangia. On substrate enriched with bicarbonate thick-walled red-brown sporangia are formed with a life-time of months. The film contrasts these 2 forms of development with microscopy and animations.
  • Published: 1998
  • Publisher: IWF (Göttingen)
  • Language: English
10:44 IWF (Göttingen) German 1998

Fortpflanzung und Entwicklung von Blastocladiella emersonii

Der Chytridiomyzet Blastocladiella emersonii besitzt einen Dimorphismus, der durch Umweltbedingungen gesteuert wird. In CO2-armer Umgebung bildet der Pilz innerhalb von 24 Stunden dünnwandige, farblose Zoosporangien; auf mit Bikarbonat angereichertem Substrat entstehen dickwandige, rotbraune Dauersporangien, die Wochen und Monate lebensfähig bleiben. Der Film dokumentiert erstmalig die Entwicklung beider Zyklen in mikroskopischen Zeitrafferaufnahmen. In einem Trick werden die beiden Entwicklungsformen gegenübergestellt.
  • Published: 1998
  • Publisher: IWF (Göttingen)
  • Language: German
Offline Collection IWF (Göttingen) Uncoded languages 1998

100 Years Greenland on Film

Greenland's Inuit were the object of cinematographic representation even in the early days of cinematography. The first film sequences were made in 1896 in the "Volkspark" in Copenhagen. Since then the Inuit have played a major role in documentaries, feature films, expeditions and travelogues as well as in scientific documentations. "100 Years of Greenland in Film" shows sequences of various cinematographic documents, analyses them particularly critically with regard to the aspect of the representation of the foreign culture and one's own culture in film. In the process, in addition to the cinematographic design elements, the socio-economic context is considered.
  • Published: 1998
  • Publisher: IWF (Göttingen)
  • Language: Uncoded languages
02:03 IWF (Göttingen) German 1998

Identitätsvertauschung nach Poggendorf und Linke

The screw threads of a rotating screw seem to move away along the axis; the illusion is not harmed when marking the screw thread. Geometrically related to Poggendorfs screw is the Plateau's spiral. After suppression of the rotatory component by a slotted mask strip slices seem to move radially. Linke 1907 refers to stroboscopic effects in both cases.
  • Published: 1998
  • Publisher: IWF (Göttingen)
  • Language: German
02:17 IWF (Göttingen) German 1998

Phänomenale Kausalität nach Michotte

Replication of Michottes experimental set-up to show the causation phenomenons thrust, push, fetch. Michottes method based on the priniple of identity change (disc and slot method) is explained, identity change is exemplarily demonstrated by a parabolic spiral masked by a slotted disc.
  • Published: 1998
  • Publisher: IWF (Göttingen)
  • Language: German
04:21 IWF (Göttingen) German 1998

Demonstrationen der phänomenalen Kausalität nach Albert Michotte

The media package contains software for the on-screen simulation of perceptual causality phenomena as they were first described by Albert Michotte as well as motion pictures demonstrating some of the possibilities of the software. With the software, the user may explore perceptual causality phenomena and their limiting conditions by variation of a multitude of parameters like, for instance, size and speed of the objects and their duration of contact. The motion pictures were shot from the computer screen and illustrate the most important event classes (push, pull, rebound,...) described by Michotte and their parametric variation.
  • Published: 1998
  • Publisher: IWF (Göttingen)
  • Language: German
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