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V Becker

Publications and source records attributed to V Becker.

At least 19 recordsLinked to original sources
PubMed1979

[Marisks].

Explore the source record for details and available documents.

Anus Neoplasms↗
PubMed1979

Invariants in configurational prey selection by Bufo bufo (L.).

Toads (Bufo bufo) are able to distinguish small stripes with axis orientation in the direction of motion (worm-like stripes) from those with axis orientation perpendicular to the direction of motion (anti-worm-like stripes). The configurational discrimination ability of the toad is, thus far investigated, largely invariant for (1) movement direction in the x-y plane, (2) direction of contrast--stripe against background--and (3) velocity of stripe motion.

Animals↗
PubMed1979

[Experimental investigation with 198Au colloid as to lymph communications between the retrobulbar space and the thyroid gland (author's transl)].

The problem of a direct connection of lymph drainage between the retrobulbar space and the thyroid gland was examined using the lymphotropic radioactive tracer 198Au colloid. Twelve rabbits were examined. Six animals were injected with 50 muCi 198Au colloid into the right thyroid lobe and six animals into the right retrobulbar space. Distribution and total body radioactivity was measured in vivo using a scintillation camera with a computer. After 6 hrs tissue specimens of different organs were measured in a well-counter. The discharge of activity from the thyroid after 6 hrs was significantly higher than that from the retrobulbar space (63% versus 33.5%). This was probably due to a higher vascularisation and to a higher degree of lymph drainage of the thyroid. The lymph drainage of the thyroid gland as well as of the retrobulbar space occurred mainly via the lymphonodi cerv. proff. No significant activity was found in the retrobulbar space after thyroid injection or in the thyroid after retrobulbar injection. It may be concluded from these results that there are no direct lymph connections between the retrobulbar space and the thyroid gland. However, indirect communications via the deep cervical lymph nodes cannot be excluded in the event of reverse lymph flow.

Animals↗
PubMed1978

[Polyneuropathy, adrenal insufficiency and diarrhea of unknown origin].

Clinico-pathological conference concerning a syndrome, characterized by considerable diagnostic problems. Polyneuropathy, adrenocortical insufficiency and diarrhea without typical changes in laboratory or functional data should always lead to the suspicion of primary amyloidosis. This diagnosis could be confirmed in the discussed case report. Its clinical relevance in regard to the type of spreading--perireticular or pericollagenous--is discussed, methods for identification are mentioned.

Adrenal Cortex Diseases↗
PubMed1978

[Studies of the lymph drainage of the eye. 4. Drainage of lymphotropic radioactive tracers (99mTc-Microcolloid) after intravitreal injection (author's transl)].

In 7 rabbits the drainage of 99mTc-labelled Micro-colloid from the vitreous body of the eye was studied. In vivo measurements with an Anger-type camera were undertaken as well as in vitro measurements after dissection and excision of tissue-probes. From the data followed that indicator's elimination half-life from the vitreous body was on an average 7.8 hours. The drainage occurred partially along structures which are associated to the optic nerve. Furthermore drainage to the ipsilateral retrobulbar space and to the regional cervical lymph nodes, mainly to the bilateral deep cervical lymph nodes could be observed.

Animals↗
PubMed1978

[Studies on the lymph drainage of the eye 5. Quantitative registration of the lymph drainage from the subconjunctival space with a radioactive tracer (author's transl)].

In 7 rabbits the drainage from the subconjunctival space to the cervical lymph nodes was observed after subconjunctival injection of 99mTc-micro-colloid. Measurements of the activity distribution were made in vivo with an Anger type camera (pho-Gamma-IV Hp, Searle Nuclear Chicago) and in vitro after dissection with a sodium iodine crystal well counter (Clinimat-200, Picker). 6 hours after the injection into the subconjunctival space of the right eye an average of 53.7% of the applied activity had drained off. A significant accumulation of activity could constantly be registrated in the cervical lymph nodes. Its amount was generally up to 2.08% of the applied total activity per animal, with a large individual spreading. In detail, activity was found in all 7 cases in the right superficial cervical lymph node, in 5 cases moreover in the right mandibular lymph node, additionally in 2 animals in the right or left deep cervical lymph node respectively and in one animal as well in the right as in the left deep cervical lymph node. Besides, in all cases high activity was registered in the right retrobulbar and subconjunctival spaces just as in the right eye. A small activity in the right optic nerve could be pointed out in three of our seven cases.

Animals↗
PubMed1977

[Drainage of the radioactive lymphotropic tracers 198 Au-colloid and 99m Tc-sulfur-colloid from the orbit in rabbits (author's transl)].

In order to investigate lymph drainage from the retrobulbar space colloid solutions (198Au-colloid and 99mTc-sulfur-colloid) were injected into the right retrobulbar space of 31 rabbits. The distribution of radioactivity was measured in vitro after dissection with a sodium iodine crystal well counter and in some animals in vivo with the Gamma camera. More than 90% of the applied activity of either colloid solution was found in some animals up to the eighth day post injection in the retrobulbar space and in the liver. The remaining activity was recovered mainly from the regional lymph nodes, due to its smaller particle size higher values were registered in the experiments with 198Au than in those with 99mTc. The highest concentrations with up to 4,6% of the activity were observed in the deep cervical lymph nodes on both sides. Minor concentrations of activity were found ipsilateral in the superficial cervical and mandibular lymph nodes. Furthermore, small but significant activities were demonstrated in the optic nerves as well as in the contralateral retrobulbar space. The present data clearly substantiate the existence of lymph drainage, although a slow one, from the retrobulbar space. Moreover they indicate a reverse prelymphatic-lymphatic flow toward the optic nerves and the contralateral retrobulbar space. These results are of importance in the discussions of lymphostatic ophthalmopathy. The clinical application of this method is desirable; however, at present it is not yet practicable without further studies.

Animals↗
PubMed1977

[Septic temperatures in questionable ascites].

The case history of a 40 year old male with septical temperatures and ascites is presented. Because of skin-pigmentation, hypotension, low rate of electrolytes, augmented renin-activity, and septical temperatures there was a suspicion of Addison's disease. A protein-rich ascites without tumor cells and erythrocytes, but with lymphocytes gives the diagnosis of peritonitis tuberculosa. Addison's disease and peritonitis tuberculosa are late manifestations of an organ tuberculosis, about 20 years after pulmonal tuberculosis.

Adrenal Insufficiency↗
PubMed1977

[Studies on the lymph drainage of the eye. 1. Quantitative registration of the lymph drainage from the orbita of the rabbit with radioactive tracers (author's transl)].

For the investigation on the lymph drainage from the orbita 99mTc-microcolloid, 99mTc-albumin and 198Au-colloid have been injected into the retrobulbar space of 24 rabbits. Measurements of the activity's distribution have been made in vivo with an Anger type camera (pho-Gamma-IV Hp, Searle Nuclear Chicago) and in vitro after section with a sodium iodine crystal well counter (Clinimat-200, Picker). A significant concentration of the activity could be observed for the most part in the equilateral Lymphonoduli cervicales profundi and superficiales and for the less part also in the equilateral Lymphonoduli mandibulares and contralateral Lymphonoduli cervicales profoundi. Furthermore significant activities could be pointed out in the optic nerves as well as in the contralateral retrobulbar space. The data substantiate a lymph drainage from the orbita as well as a partly reverse "prelymphatic-lymphatic" flow and are of importance for discussions about lymphostatic ophthalmopathy and sympathetic ophthalmitis. For application on man 99mTc-microcolloid (Lymphoscint) shoud be preferred, because with this tracer 1. the lymph drainage can be measured quantitatively quite exactly by extern measurement with the Anger-camera, 2. the allowable radiation dosis for the lens is lying between 0.5-1.0 rad/mCi.

Animals↗