Investigations into the Influence of Temperature on the Tensile Shear Strength of Various Adhesives.

The temperature resistance of glued timber, which is crucial for glued wood construction, represents a significant assessment criterion. To gain insights into this aspect, this study utilized methods such as a shear strength test in accordance with EN 302-1:2013-06 under thermal loading (from 20 °C to 200 °C), and Differential Scanning Calorimetry (DSC) to determine the glass transition temperature (Tg). An increase in thermal load resulted in a decrease in shear strength and an increase in wood breakage.

Investigations on the Characterization of Various Adhesive Joints by Means of Nanoindentation and Computer Tomography.

The mechanical properties of cured wood adhesive films were tested in a dry state by means of nanoindentation. These studies have found that the application of adhesives have an effect on the accuracy of the hardness and elastic modulus determination. The highest values of hardness among the tested adhesives at 20 °C have condensation resins: MF (0.

Evaluation of concordance between CAD/CAM and clinical positions of abutment shoulder against mucosal margin: an observational study.

Background: While working on CAD/CAM-customized abutments, the use of standard impression copings with a circular diameter produces inconsistency within the emergence profile. It may begin with a collapse of the supra-implant mucosa during impression taking, then lead to a computer-generated mismatch of the position and outline of the abutment shoulder, and consequently result in a compromised outcome of anticipated treatment. The aim of the study was to compare the virtual and clinical positions of the abutment shoulder in relation to the mucosal margin after the abutment delivery.

Assessment of aprotinin influence on periodontal clinical status and matrix metalloproteinases 1, 2 and their tissue inhibitors saliva concentrations in patients with chronic periodontitis.

Purpose: Assessment of the effect of treatment with aprotinin-containing drug on the clinical status of the periodontal tissue and on the concentrations of metalloproteinases released in the course of periodontitis (MMP-1, MMP-2) as well as their tissue inhibitors (TIMP-1 and TIMP-2) in the saliva of patients with chronic periodontitis (CP).

Material/methods: The study involved 25 subjects with CP (39-68 years), including 16 women and 9 men. The patients were prescribed aprotinin preparation to be taken for 2 weeks.

Efficacy of local treatment with chlorhexidine gluconate drugs on the clinical status of periodontium in chronic periodontitis patients.

Purpose: Chlorhexidine gluconate is a relatively commonly used chemotherapeutic in the treatment of periodontitis (P), exhibiting antimicrobial capabilities against Gram-negative and Gram-positive bacteria, and fungi. This compound is a component of various preparations for topical use in the form of solutions for mouthrinsing or peri-irrigation, gels, varnishes, chips and even chewing gums. The aim of the study was the clinical evaluation of periodontium after treatment with one of the drugs containing chlorhexidine gluconate (Corsodyl) as compared to professional tooth cleaning in patients with chronic periodontitis.

Assessment of salivary levels of the chosen exoglycosidases in patients with aggressive periodontitis after treatment with doxycycline.

Purpose: The aim of the study was the clinical assessment of the periodontium in patients with aggressive periodontitis (AP) after treatment with doxycycline hyclate. Moreover, an attempt was made to evaluate the effect of the treatment on the salivary concentrations of beta-glucuronidase, HEX, HEX A and HEX B in AP patients.

Material And Methods: Sixteen patients with aggressive periodontitis, aged 28-45 years, were enrolled in the study.

Mutations in the von hippel-lindau tumour suppressor gene in central nervous system hemangioblastomas.

Central nervous system hemangioblastomas (cHAB) are rare tumours which most commonly arise in the cerebellum. Most tumours are sporadic, but as many as one third of cHABs occur in the course of the hereditary disorder - von Hippel-Lindau disease (VHL). In order to diagnose new VHL families in Poland we performed sequencing of the entire VHL gene in archival material (paraffin embedded hemangioblastoma tissues) in a large series of 203 unselected patients with cHAB.

[Organ changes in experimental strongyloidosis of rabbits provoked by Strongyloides papillosus].

Strongyloidosis was induced by percutaneous injection of rabbits; then organ changes were tested. It has been found that Strongyloides papillosus evoked changes in intestine, liver, kidney and lung. No notable changes were found in heart, spleen and suprarenal gland.

[Lymphocytic aggregations in the bone marrow: their occurrence and morphologic analysis].

We analyzed the morphology and incidence of aggregations of mature lymphocytes of the bone marrow in the autopsy material of 425 cases excluding disorders of the hematopoietic and lymphatic systems. We found that lymphocytic aggregations occurred in 21.1% cases.

[Necrosis of the bone marrow].

The authors analyzed the incidence of necrosis of the bone marrow in nonselected autopsy material. The studies included 419 cases of various disease types. Necrosis of the bone marrow was found in 83 cases (19.

[Effect of alcohol on the development of biochemical and morphologic findings of liver damage in the rabbit].

Ethanol 48% was applied to the experimental model in 3 examined groups of rabbits in different periods of administration and differentiated daily doses on order to investigate the influence of ethanol upon the formation of morphological and biochemical indices of the liver lesion. Biochemical investigations were carried out on 3 and 7 day of the experiment and repeated at week by intervalls. All the animals were dissected and morphological examinations of the liver were carried out.

The effect of repeated BCG vaccine administration associated with surgery upon the growth of lung metastases in rats with transplantable Morris 5123 hepatoma.

Eighty four male Buffalo rats bearing transplantable Morris 5123 hepatoma were used for the experiment. Half of the animals were given into the tumor BCG vaccine (final dose 2.2 X 10(6) living mycobacteria), the other 42 rats after BCG underwent surgical removal of the hind leg together with the tumor.