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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
01:21 IWF (Göttingen) English 2006

Development and deformability of red blood cells

Erythrocytes in suspension. Blood flow though capillaries with visible erythrocytes (8x slow-motion). Animation demonstrating the development of red blood cells from bone marrow stem cells. Deformation of erythrocytes in an arterial blood vessel. 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
01:28 IWF (Göttingen) German 2006

Membranverformung bei Erythrozyten

Verformung von roten Blutkörperchen bei der Passage durch ein arterielles Gefäß. Animation zur Verformung der Erythrozytenmembran im Experiment. Darstellung der Membranverformung im Reflexionsmikroskop. 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
02:42 IWF (Göttingen) English 2006

Plasmolysis and Deplasmolysis

Overview and higher magnification of plasmolysis and deplasmolysis in the epidermis cells of the onion Allium cepa. Schematic view of plasmolysis. Occurrence of Hechtian strands between plasmodesmata and plasma during plasmolysis. Deplasmolysis in cells of Allium cepa. 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
01:13 IWF (Göttingen) English 2006

Cytorrhysis

Leaflet of the moos Hookeria lucens: Changes under desiccation. Higher magnification reveals the behaviour of the protoplasm in cells of the leaflet under desiccation. An animation shows the spatial processes during cytorrhysis. 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
01:12 IWF (Göttingen) German 2006

Zytorrhyse

Blatt des Laubmooses Hookeria lucens unter Austrocknung. Beobachtung des Protoplasmas bei Austrocknung in Blattzellen des Mooses (stärkere Vergrößerung). Schematische Darstellung der räumlichen Vorgänge bei der Zytorrhyse. 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
1:05:21 Instituto de Ciencias Matemáticas (ICMAT) English 2006

Applications of Equivariant Cohomology

We will discuss the equivariant cohomology of a manifold endowed with the action of a Lie group. Localization formulae for equivariant integrals are explained by a vanishing theorem for equivariant cohomology with generalized coefficients. We then give applications to integration of characteristic classes on symplectic quotients and to indices of transversally elliptic operators. In particular, we state a conjecture for the index of a transversally elliptic operator linked to a Hamiltonian action. In the last part, we describe algorithms for numerical computations of values of multivariate spline functions and of vector-partition functions of classical root systems.
  • Published: 2006
  • Publisher: Instituto de Ciencias Matemáticas (ICMAT)
  • Language: English
External Website TU Clausthal Original sound, no spoken text 2006

Carring II - Ein zuverlässiges Echtzeit-Rechnernetz für Steer-By-Wire

In zukünftigen elektronischen Lenkrädern für Automobile erfolgt die Steuerung der Vorderräder über 2 Elektromotoren, sowie über Sensoren am Lenkrad, die dessen Einschlag und Drehmoment messen. Die Lenksäule entfällt. Dies wird durch ein verteiltes mechatronisches System ermöglicht, das einen Feldbus als Kommunikationsmedium enthält. Feldbusse sind jedoch auf die Bitübertragungs- und Medienzugangsschicht im ISO-7-Schichten-Modell beschränkt. Im Film wird ein neues Echtzeit-Rechnernetz anhand eines Steer-By-Wire-Teststandes präsentiert, das Feldbusse im Automobil ablösen soll.
  • Published: 2006
  • Publisher: TU Clausthal
  • Language: Original sound, no spoken text
03:05 IWF (Göttingen) Silent film 2006

Meeresplankton - Crustacea (Krebse)

Heterotrophic zooplankton is commonly much more diverse than phytoplankton. Representatives of most animal phyla either belong to the plankton throughout their life or have certain developmental phases in the plankton - hence they are called holo- or meroplankton, respectively. Meroplanktonic larvae do not resemble their parents, but transform into the adult form by metamorphosis (indirect development). Crustacea are present in almost every plankton sample and represent the bulk of its biomass. Besides abundant holoplanktonic representatives of various systematic groups, namely from the Branchiopoda, Copepoda, Mysidacea, and Euphausiacea, crustaceans produce a vast variety of larval forms with many of them bearing specific names. The zoëa larva for example represents the typical hatching form of many marine decapod crustaceans. From the DVD: DAHMS, HANS-UWE (Hongkong); FIEGE, DIETER (Frankfurt a. M.). Marine Plankton. (C 12863)
  • Published: 2006
  • Publisher: IWF (Göttingen)
  • Language: Silent film
00:32 IWF (Göttingen) Silent film 2006

Meeresplankton - Rotatoria (Rädertiere)

Heterotrophic zooplankton is commonly much more diverse than phytoplankton. Representatives of most animal phyla either belong to the plankton throughout their life or have certain developmental phases in the plankton - hence they are called holo- or meroplankton, respectively. Meroplanktonic larvae do not resemble their parents, but transform into the adult form by metamorphosis (indirect development). Whereas rotifers are very abundant and diverse in freshwater plankton, there are only a few species in the marine plankton. Most of the rotifers are very small (<1 mm) and consist of about 1000 cells (eutely). The body is surrounded by a proteinaceous shell (lorica) made of keratin that shows spiniform emarginations. A charasteristic feature is the corona at the anterior part of the body. The beat of its cilia serve for locomotion and feeding. From the DVD: DAHMS, HANS-UWE (Hongkong); FIEGE, DIETER (Frankfurt a. M.). Marine Plankton. (C 12863)
  • Published: 2006
  • Publisher: IWF (Göttingen)
  • Language: Silent film
02:10 IWF (Göttingen) Silent film 2006

Meeresplankton - Polychaeta (Borstenwürmer)

Heterotrophic zooplankton is commonly much more diverse than phytoplankton. Representatives of most animal phyla either belong to the plankton throughout their life or have certain developmental phases in the plankton - hence they are called holo- or meroplankton, respectively. Meroplanktonic larvae do not resemble their parents, but transform into the adult form by metamorphosis (indirect development). Polychaetes are among the dominant invertebrate groups of the marine benthos. Some representatives of this group have adapted to a life in the pelagic realm - a minority representing roughly 140 of about 10.000 known species. Besides these holoplanktonic species, the larvae of many benthic polychaetes develop in the plankton. They show a trochophore as a primary larva and depending on the taxa involved, rather morphologically derived secondary larvae. From the DVD: DAHMS, HANS-UWE (Hongkong); FIEGE, DIETER (Frankfurt a. M.). Marine Plankton. (C 12863)
  • Published: 2006
  • Publisher: IWF (Göttingen)
  • Language: Silent film
01:08 IWF (Göttingen) Silent film 2006

Meeresplankton - Echinodermata (Stachelhäuter)

Heterotrophic zooplankton is commonly much more diverse than phytoplankton. Representatives of most animal phyla either belong to the plankton throughout their life or have certain developmental phases in the plankton - hence they are called holo- or meroplankton, respectively. Meroplanktonic larvae do not resemble their parents, but transform into the adult form by metamorphosis (indirect development). The pentaradiate and mostly benthic echinoderms develop very characteristic larvae that are bilaterally symmetrical and swim by the beat of cilia bands. A primary larva of all echinoderms is the dipleurula larva. Larvae of asteroids and ophiurans are characterized by long projections, that are stabilized by skeletal elements made of calcium carbonate. From the DVD: DAHMS, HANS-UWE (Hongkong); FIEGE, DIETER (Frankfurt a. M.). Marine Plankton. (C 12863)
  • Published: 2006
  • Publisher: IWF (Göttingen)
  • Language: Silent film
00:30 IWF (Göttingen) Silent film 2006

Meeresplankton - Sipuncula (Spritzwürmer)

Heterotrophic zooplankton is commonly much more diverse than phytoplankton. Representatives of most animal phyla either belong to the plankton throughout their life or have certain developmental phases in the plankton - hence they are called holo- or meroplankton, respectively. Meroplanktonic larvae do not resemble their parents, but transform into the adult form by metamorphosis (indirect development). During the indirect ontogeny of sipunculans a secondary larva, the pelagosphaera, succeeds a trochophore larva. Its body consists of a frontal cephalic region, a middle region with a ciliary band and the trunk. The head and the middle region can be retracted into the trunk. From the DVD: DAHMS, HANS-UWE (Hongkong); FIEGE, DIETER (Frankfurt a. M.). Marine Plankton. (C 12863)
  • Published: 2006
  • Publisher: IWF (Göttingen)
  • Language: Silent film
02:18 IWF (Göttingen) Silent film 2006

Meeresplankton - Gastropoda (Schnecken)

Heterotrophic zooplankton is commonly much more diverse than phytoplankton. Representatives of most animal phyla either belong to the plankton throughout their life or have certain developmental phases in the plankton - hence they are called holo- or meroplankton, respectively. Meroplanktonic larvae do not resemble their parents, but transform into the adult form by metamorphosis (indirect development). Only a few of the about 70.000 marine gastropods known to date show a holoplanktonic life style. Typical representatives of the latter are heteropods and pteropods. Besides these holoplanktonic forms the veliger larvae of benthic adults are found in the plankton. The name of this larva is derived from its swimming organ, the velum, a paired, lateral emargination of the head. From the DVD: DAHMS, HANS-UWE (Hongkong); FIEGE, DIETER (Frankfurt a. M.). Marine Plankton. (C 12863)
  • Published: 2006
  • Publisher: IWF (Göttingen)
  • Language: Silent film
01:09 IWF (Göttingen) Silent film 2006

Meeresplankton - Ctenophora (Rippenquallen)

Heterotrophic zooplankton is commonly much more diverse than phytoplankton. Representatives of most animal phyla either belong to the plankton throughout their life or have certain developmental phases in the plankton - hence they are called holo- or meroplankton, respectively. Meroplanktonic larvae do not resemble their parents, but transform into the adult form by metamorphosis (indirect development). Ctenophores resemble medusae in their gelatinous consistency and transparency. However, contrary to the cnidaria, they show a biradial body symmetry. On the surface there are eight rows of comb cilia running from the apical pole to the mouth providing locomotion. Ctenophores are predators and develop via a so-called cydippe stage. From the DVD: DAHMS, HANS-UWE (Hongkong); FIEGE, DIETER (Frankfurt a. M.). Marine Plankton. (C 12863)
  • Published: 2006
  • Publisher: IWF (Göttingen)
  • Language: Silent film
03:18 IWF (Göttingen) Silent film 2006

Meeresplankton - Algen (Pflanzliche Organismen)

Unicellular plankton organisms comprise bacteria, heterotrophic protists, and algae. Here, diatoms and dinoflagellates represent the bulk of photosynthetic primary producers. Protists are represented by radiolarians, foraminiferans and ciliates. Photoautotrophic unicellular plankton is dominated by diatoms and dinoflagellates. They occur in all seas and provide the bulk of the photosynthetic primary production. In some groups there are photoautotrophic besides heterotrophic forms, as well as mixotrophic transient forms. Mass development of dinoflagellates can produce harmful algal blooms (HABs, also called red tides). Some diatom species produce toxins leading to severe intoxications by accumulation in the food web. From the DVD: DAHMS, HANS-UWE (Hongkong); FIEGE, DIETER (Frankfurt a. M.). Marine Plankton. (C 12863)
  • Published: 2006
  • Publisher: IWF (Göttingen)
  • Language: Silent film
00:29 IWF (Göttingen) Silent film 2006

Meeresplankton - Wanderungen, Verbreitung

Planktonic organisms have by definition only limited capabilities for locomotion. Due to the vast diversity of planktonic taxa belonging to all biotic kingdoms, very diverse ways of locomotion have evolved as well as a variety of morphological, and physiological adaptations for buoyancy regulation. Some planktonic organisms are able to migrate within restricted areas, often forming swarms. At the onset of dusk many zooplankton organisms migrate from deeper water layers, where they remain during the day, to the surface, moving back again to deeper layers before dawn (diurnal migration). Distances that are covered during these migration periods can be several hundred meters. Vertical patterns of distribution varies not only among species but alsowith season, sex, developmental stage or age. From the DVD: DAHMS, HANS-UWE (Hongkong); FIEGE, DIETER (Frankfurt a. M.). Marine Plankton. (C 12863)
  • Published: 2006
  • Publisher: IWF (Göttingen)
  • Language: Silent film
00:38 IWF (Göttingen) Silent film 2006

Meeresplankton - Bakterien (Ultramikroplankton)

Unicellular plankton organisms comprise bacteria, heterotrophic protists, and algae. Here, diatoms and dinoflagellates represent the bulk of photosynthetic primary producers. Protists are represented by radiolarians, foraminiferans and ciliates. The smallest and most abundant organisms in the plankton are bacteria. Due to their minute size they belong to the ultramicroplankton (< 2 µm). They thrive in the pelagic but also on detrital particles or other plankton organisms. Bacteria are not characterized by a high diversity of forms but by their enormous metabolic potential. This enables them to make use of a broad spectrum of nutrients. They contribute enormously to the decomposition and recycling of organic material. From the DVD: DAHMS, HANS-UWE (Hongkong); FIEGE, DIETER (Frankfurt a. M.). Marine Plankton. (C 12863)
  • Published: 2006
  • Publisher: IWF (Göttingen)
  • Language: Silent film
01:18 IWF (Göttingen) Silent film 2006

Meeresplankton - Cnidaria (Nesseltiere)

Heterotrophic zooplankton is commonly much more diverse than phytoplankton. Representatives of most animal phyla either belong to the plankton throughout their life or have certain developmental phases in the plankton - hence they are called holo- or meroplankton, respectively. Meroplanktonic larvae do not resemble their parents, but transform into the adult form by metamorphosis (indirect development). Cnidaria occur in the plankton as larvae but also as medusae or colonies of siphonophores. Scyphomedusae are among the largest planktonic forms of life. They are commonly called jellyfish due to their gelatinous umbrella. Their medusae develop from ephyrae that are detached from sessile polyps in a process called strobilation. All these forms move primarily by jet propulsion. From the DVD: DAHMS, HANS-UWE (Hongkong); FIEGE, DIETER (Frankfurt a. M.). Marine Plankton. (C 12863)
  • Published: 2006
  • Publisher: IWF (Göttingen)
  • Language: Silent film
00:39 IWF (Göttingen) Silent film 2006

Meeresplankton - Turbellaria (Strudelwürmer)

Heterotrophic zooplankton is commonly much more diverse than phytoplankton. Representatives of most animal phyla either belong to the plankton throughout their life or have certain developmental phases in the plankton - hence they are called holo- or meroplankton, respectively. Meroplanktonic larvae do not resemble their parents, but transform into the adult form by metamorphosis (indirect development). Among the turbellarians only some representatives of the Polycladida develop a planktonic larvae that is called Müller's larva. It develops from a trochophore-like stage by the formation of 8 ciliated lobes. This larva can be caught using fine-meshed plankton nets. Thos larval phase lasts only a few days. The metamorphosis delivers a young turbellarian worm which can still be found in plankton samples before it settles to perform a benthic life. From the DVD: DAHMS, HANS-UWE (Hongkong); FIEGE, DIETER (Frankfurt a. M.). Marine Plankton. (C 12863)
  • Published: 2006
  • Publisher: IWF (Göttingen)
  • Language: Silent film
00:27 IWF (Göttingen) Silent film 2006

Meeresplankton - Rückstoß

Planktonic organisms have by definition only limited capabilities for locomotion. Due to the vast diversity of planktonic taxa belonging to all biotic kingdoms, very diverse ways of locomotion have evolved as well as a variety of morphological, and physiological adaptations for buoyancy regulation. An effective way of swimming is provided by jet propulsion, which is not only utilized by cephalopods, but also by medusae and other planktonic organisms. Medusae force water out of their subumbrellar cavity by rhythmically contracting the umbrella. From the DVD: DAHMS, HANS-UWE (Hongkong); FIEGE, DIETER (Frankfurt a. M.). Marine Plankton. (C 12863)
  • Published: 2006
  • Publisher: IWF (Göttingen)
  • Language: Silent film
00:33 IWF (Göttingen) Silent film 2006

Meeresplankton - Wimperplatten

Planktonic organisms have by definition only limited capabilities for locomotion. Due to the vast diversity of planktonic taxa belonging to all biotic kingdoms, very diverse ways of locomotion have evolved as well as a variety of morphological, and physiological adaptations for buoyancy regulation. In Ctenophores the body is divided by cilia fused to combs arranged in 8 longitudinal rows. They beat synchronously from the mouth to the apical pole of the body, pushing ctenophores through the water with their mouth opening in front. From the DVD: DAHMS, HANS-UWE (Hongkong); FIEGE, DIETER (Frankfurt a. M.). Marine Plankton. (C 12863)
  • Published: 2006
  • Publisher: IWF (Göttingen)
  • Language: Silent film
02:32 IWF (Göttingen) German 2006

Waldwachstumssimulation mit BWinPro

The 3d-simulation illustrates the constitution and growth of a beech/spruce-forest of the Solling mountains (Germany). Changes in structure and composition of the forest are predicted over 37 years with the softwares BWinPro and SimWald. Growth parameters and target size of the tree-species determine the blend and provide a good example how a computerbased analysis of the tree-population can optimize the economical utilisation of the forest.
  • Published: 2006
  • Publisher: IWF (Göttingen)
  • Language: German
05:54 IWF (Göttingen) German 2006

Stevia - Gesunde Süße aus der Pflanze

The Stevia-plant from Paraguay contains a sweetener, that is 300 times stronger than sucrose. The socalled steviosid is located in the leafs, has no calories and offers health benefits. At the university of Bonn cultivation-techniques were developed for Stevia rebaudiana (family asteraceae). Tissue-culture proved to be much better for selection and reproduction of fruitful plants than sowing or scion-proliferation.
  • Published: 2006
  • Publisher: IWF (Göttingen)
  • Language: German
00:47 IWF (Göttingen) Silent film 2006

Meeresplankton - Auftriebshilfen

Planktonic organisms have by definition only limited capabilities for locomotion. Due to the vast diversity of planktonic taxa belonging to all biotic kingdoms, very diverse ways of locomotion have evolved as well as a variety of morphological, and physiological adaptations for buoyancy regulation. To compensate for the fact that their specific weigth is higher than water, weight reduction, formation of floating appendages, and the incorporation of oil and gas are common adjustments to slow down sinking rates and thus save energy for swimming. From the DVD: DAHMS, HANS-UWE (Hongkong); FIEGE, DIETER (Frankfurt a. M.). Marine Plankton. (C 12863)
  • Published: 2006
  • Publisher: IWF (Göttingen)
  • Language: Silent film
01:30 IWF (Göttingen) Silent film 2006

Meeresplankton - Planktonfang

The vertical and horizontal distribution of plankton in the sea depends on several parameters resulting in a certain degree of patchiness. The local composition also varies according to the time of the day. Some species emerge only during the day, others only at night. Most of the plankton organisms are very sensitive to changes of temperature and oxygen. Therefore, live organisms have to be studied immediately after sampling. There is a non-homogeneous distribution of plankton ('patchiness') due to water movements, distribution of nutrients, oxygen, temperature gradients and the migration of plankton. Tropical seas are also called 'blue deserts' due to the low density of particulate organic matter and plankton organisms. With the aid of special nets made of fine-meshed gauze and towed at a speed of 1-2 knots, plankton is concentrated during sampling. The size class of organisms captured is determined by the mesh-size used. From the DVD: DAHMS, HANS-UWE (Hongkong); FIEGE, DIETER (Frankfurt a. M.). Marine Plankton. (C 12863)
  • Published: 2006
  • Publisher: IWF (Göttingen)
  • Language: Silent film
00:34 IWF (Göttingen) Silent film 2006

Meeresplankton - Enteropneusta (Eichelwürmer)

Heterotrophic zooplankton is commonly much more diverse than phytoplankton. Representatives of most animal phyla either belong to the plankton throughout their life or have certain developmental phases in the plankton - hence they are called holo- or meroplankton, respectively. Meroplanktonic larvae do not resemble their parents, but transform into the adult form by metamorphosis (indirect development). The tornaria larva of enteropneusts resembles the bipinnaria or auricularia larva of echinoderms at first glance. Its ciliated bands, however, are even more elaborate and develop complicated folds and saddles, particularly in later stages. These bands function primarily in the capture of food particles while locomotion is primarily achieved by the characteristic circumanal band of cilia (Telotroch). The tornaria of some species can reach several millimeters in length and stay in the plankton for extended periods of time. From the DVD: DAHMS, HANS-UWE (Hongkong); FIEGE, DIETER (Frankfurt a. M.). Marine Plankton. (C 12863)
  • Published: 2006
  • Publisher: IWF (Göttingen)
  • Language: Silent film
00:57 IWF (Göttingen) Silent film 2006

Meeresplankton - Nachtfang

The vertical and horizontal distribution of plankton in the sea depends on several parameters resulting in a certain degree of patchiness. The local composition also varies according to the time of the day. Some species emerge only during the day, others only at night. Most of the plankton organisms are very sensitive to changes of temperature and oxygen. Therefore, live organisms have to be studied immediately after sampling. The plankton composition at a certain water depth during day- and nighttime varies due to diurnal vertical migration. In the dark many plankton organisms are attracted by light and can easily be collected by a small net. From the DVD: DAHMS, HANS-UWE (Hongkong); FIEGE, DIETER (Frankfurt a. M.). Marine Plankton. (C 12863)
  • Published: 2006
  • Publisher: IWF (Göttingen)
  • Language: Silent film
01:56 IWF (Göttingen) Silent film 2006

Meeresplankton - Chordata (Chordatiere)

Heterotrophic zooplankton is commonly much more diverse than phytoplankton. Representatives of most animal phyla either belong to the plankton throughout their life or have certain developmental phases in the plankton - hence they are called holo- or meroplankton, respectively. Meroplanktonic larvae do not resemble their parents, but transform into the adult form by metamorphosis (indirect development). The chordates are comprised of appendicularians, ascidians, thaliaceans and vertebrates. The last mentioned are only present in the plankton in the form of eggs and fish larvae. Appendicularians and salps are completely transparent as an adaptation to pelagic life. They feed on small plankton, that is accumulated by highly efficient mechanisms of suspension feeding. From the DVD: DAHMS, HANS-UWE (Hongkong); FIEGE, DIETER (Frankfurt a. M.). Marine Plankton. (C 12863)
  • Published: 2006
  • Publisher: IWF (Göttingen)
  • Language: Silent film
01:04 IWF (Göttingen) Silent film 2006

Meeresplankton - Labor

The vertical and horizontal distribution of plankton in the sea depends on several parameters resulting in a certain degree of patchiness. The local composition also varies according to the time of the day. Some species emerge only during the day, others only at night. Most of the plankton organisms are very sensitive to changes of temperature and oxygen. Therefore, live organisms have to be studied immediately after sampling. Studies of live plankton should take place immediately after sampling since changes in temperature, oxygen deficiency and increased light intensity cause a rapid mortality of sensitive plankton organisms. From the DVD: DAHMS, HANS-UWE (Hongkong); FIEGE, DIETER (Frankfurt a. M.). Marine Plankton. (C 12863)
  • Published: 2006
  • Publisher: IWF (Göttingen)
  • Language: Silent film
00:58 IWF (Göttingen) German 2006

Wirkung von Sauerstoffmangel auf Paramecium

Failure of the contractile vacuole due to oxygen deficiency resulting in swelling and ultimately bursting of the cell. 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: German
00:37 IWF (Göttingen) German 2006

Melisse in Wasser

Wirkung eines hypotonen Mediums (Wasser) auf den Zellturgor einer Melissenpflanze, Aufnahmen in 100facher Zeitraffung. 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
00:29 IWF (Göttingen) German 2006

Melisse in hypertoner Zuckerlösung

Wirkung einer hypertonen Zuckerlösung auf den Zellturgor einer Melissenpflanze, Aufnahmen in 100facher Zeitraffung. 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
00:35 IWF (Göttingen) German 2006

Aufrichten einer welken Melisse nach Angießen

Wiederherstellung des Turgors in einer welken Melissenpflanze nach Wassergabe. 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
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    0 ms - highlighting/10773
    0 ms - highlighting/10777
    0 ms - highlighting/10757
    0 ms - highlighting/10775
    0 ms - highlighting/10772
    0 ms - highlighting/10768
    0 ms - highlighting/10789
    0 ms - highlighting/17134
    0 ms - highlighting/10754
    0 ms - highlighting/10575
    0 ms - highlighting/14775
    0 ms - highlighting/10756
    0 ms - highlighting/14777
    0 ms - highlighting/10762
    0 ms - highlighting/10759
    0 ms - highlighting/10761
    0 ms - highlighting/14774
    0 ms - highlighting/14778
    0 ms - highlighting/14720
    0 ms - highlighting/14901
    0 ms - highlighting/14910
    2 ms - highlighting/15979

Version

AV-Portal 3.8.0 (dec2fe8b0ce2e718d55d6f23ab68f0b2424a1f3f)