Monday, 9 December 2019

Case of ovarian cavernous hemangioma

Case report

A 46 year-old woman without any pathological background except multiple uterine leiomyomas was undergone to a total hysterectomy and bilateral adnexectomy. During study of surgical specimen, a little reddish nodule of 9 mm was discovered in the hilum of the left ovary. 

Microscopically, this nodule was made of dilated thin-walled vascular channels, filled of blood.

Image taken with a Moticam X3

Wednesday, 4 December 2019

Lick granuloma dog

A lick granuloma or acral lick dermatitis is a place on the skin as a result of frequent licking by the dog and is found usually at the end of the paws, hence acral (think of the Athenian Acropolis: city on top) Lesion is sharply defined. This is a nasty ailment. It is not always clear what causes it, but itching is often the reason. A physical cause is rarely found. Usually the cause is psychological such as boredom, separation anxiety, stress, nervousness or attention seeking behavior. Licking is then a distraction for the dog. Once the dog is licking, it is difficult to stop this. It has become a habit for the dog.

The first symptoms are discoloration of the coat due to the saliva. The skin can become thicker and bald. Inflammation of the skin is possible due to the granuloma. This starts itching more and makes the dog more lick and bite. Then the dog comes in a vicious circle. The process can continue down to the bone, sometimes amputation is necessary. A lick granuloma actually only occurs on the front legs.


Wednesday, 20 November 2019

Primitive, but unique

Ferns are perhaps very old plants, but they are unique in their kind. They already occur in several hundred million year old fossils. After all, it was the first plant with roots and a real vascular system. In this way the ferns managed to extract water from the ground and use it for their further development. Because of the branches of the vessels it was also possible to get the water into the tops of the feathers or leaves. Ferns do not carry flowers. They therefore do not propagate with seeds, caused by fertilization of pistils with pollen through bees, beetles, birds, wind or otherwise. 

Thursday, 14 November 2019

Honey - Try to find out its origin

Honey is one of the oldest food products. Cave paintings from the stone age give witness of how the product of wild bees has been used as the first sweetener, containing lots of positive ingredients for a general healing effect.

Nowadays honey is part of the food industry with its profit orientated mechanisms. Price is an issue, and the cold hurled product needs careful attention and efforts for maximum quality.

The origin of a product in general is essential for tracing the manufacturing steps. Latest since BIO became a quality issue in food industry, foodstuff testing laboratories are looking for hints to find out the nectar and honeydew sources which are the basis of honey. Pollen residuals within the honey give a clear indication about the region of origin. In Europe, honey from Central America is widespread, but not always clearly indicated. Eastern Europe and China are playing an important role as honey producers.

Once the pollen is detected and allocated to a defined plant species, it is easy to debunk imposters. Pollen from tropic plants found in a honey sample declared as a Central European product – a microscope will be the necessary tool to find out. Brightfield illumination is the required method, Phase contrast is not optimal as the pollen grains clearly have a significant 3D dimension, too thick for applying this contrast method. Simple POL contrast may help to find the isolated pollen grains within the honey sample.

Some examples from the Middle European flora:

Leontodon spec.

Wednesday, 6 November 2019

It hides in moss and lichen

When studying moss and lichen under the microscope, you will discover that in addition to the beautiful pictures it produces, a lot of animal life crawls around in it. If you walk through nature and see the many types of moss and lichen, you actually do not realize that. This is perhaps due to the fact that the animals are hardly visible to the naked eye.

Wednesday, 23 October 2019

Rabbits

The reproductive organs of the rabbit female are seen as primitive. The fixing of the gender of the rabbit occurs during the embryonic phase, on the 16th day after conception. The ovaries develop from a mass of cells that are located near the testicles. The development of the ovaries is accompanied by the degeneration of the male testicles. The development of egg cells occurs approximately from the 21st day and will continue until birth, around the 30th day.

The first follicle, the "bags" in which the eggs (ova) mature, develops 13 days after birth. (See the accompanying photo on which the follicles containing the eggs can be seen at various stages of development) The development of the ovary starts around the 21st day after birth and continues until the 30th day. The first eggs do not begin to develop until 13 days after birth. The ovaries, ellipse shaped bodies of approximately 1.5 cm, are found at the end of each uterus, just below the kidneys.


Wednesday, 9 October 2019

Spores

For some people moss is a green plague. For other people moss is of unprecedented beauty. The Netherlands has more than 600 species of moss. There is even a real red list of rare and endangered moss species. Moss is a spore plant. The sporangium grows into a thickening in which the spores are located. As soon as the spores are ripe, the thickening will lose its cap and the spores can be transported by the wind.

Wednesday, 2 October 2019

A perfect sample for understanding the fine focus procedure: Pollen grains from Cobaea scandens

Cobaea Scandens (Jacob’s ladder family) is a widespread ornamental plant for garden and balcony. Domiciled in Mexico, this climbing plant is cultivated as an annual in the temperate zones.


Beside its aesthetics with bell-shaped violet flowers, there are two more aspects worth to mention:
  • This plant is pollinated by bats. 
  • Tthe large (~ 160 microns Ø) pollen grains of Cobaea show a complex structure which is worth to discover.
Pollen Grains in Brighfield

Wednesday, 25 September 2019

Silent flight

Why can an owl fly almost silently? The owl hunts at night and wants to make as little noise as possible in order not to frighten his prey.

Wednesday, 18 September 2019

Selecting the right microscope

AE Series

Category: Advanced Inverted Microscopes for Transmitted light

Target specimen: Cell cultures from microbiology, in flasks or petri dishes, on agar or in fluids; water samples from biology

Target customer: Lab technicians, advanced students

This comparison is an approach for classifying different Inverted microscopes in a defined performance range. Here we are talking about Motic’s AE series, meant for routine work in the microbiology lab of universities and related labs of industrial companies.

The following chart is based on the specifications of the basic outfit of both AE models and its available options. Within this series of publications, our rating always rests upon an individual understanding and validation of the actual numerical values.


AE SERIES - Comparison Chart