Multi-stage decomposition of 5-aminotetrazole derivatives: kinetics and reaction channels for the rate-limiting steps.

The thermal behavior, decomposition kinetics and mechanisms of 1-amino-1-(tetrazol-5-yldiazenyl) guanidine (tetrazene) and 2-(tetrazol-5-yldiazenyl) guanidine (MTX-1) have been investigated using DSC, TG techniques, and quantum chemical calculations. It has been found that MTX-1 is much more stable than tetrazene and MTX-1, and both of them decompose in three steps with different kinetic parameters. Tetrazene is melted-dehydrated at 128.

Sentinel node biopsy and neoadjuvant chemotherapy in the treatment of breast cancer.

Purpose: Sentinel lymph node biopsy (SLNB) has become a safe and accurate alternative to axillary lymph node dissection (ALND) in the surgical management of early breast cancer. The aim of this study was to determine the false negative rate of SLNB in patients with advanced breast cancer after neoadjuvant chemotherapy.

Methods: Forty-eight patients with 49 advanced breast cancers (one patient had bilateral disease) underwent neoadjuvant chemotherapy.

Sensitivity to friction for primary explosives.

The sensitivity to friction for a selection of primary explosives has been studied using a small BAM friction apparatus. The probit analysis was used for the construction of a sensitivity curve for each primary explosive tested. Two groups of primary explosives were chosen for measurement (a) the most commonly used industrially produced primary explosives (e.

[Initial results of the bipolar RFITT coagulation in advanced stages of hemorrhoidal disorder study].

Aim Of The Study: The aim is to verify a new methodology of radiofrequency bipolar coagulation for treatment of hemorrhoids in practice. USED METHODS: The method of bipolar radiofrequency-induced thermotherapy of internal and external hemorrhoids using the Olympus Celon apparatus. Radiofrequency bipolar electrode was applied to perform coagulation of internal and external hemorrhoids under visual control and feedback.

[Local recurrences after conservative surgery in breast carcinoma].

Background: Local recurrences in breast after conservative surgery are failure of primary therapy. The aim of the study was monitoring of local recurrences after conservative surgery and also relationships of local recurrences with disease free interval and survival.

Materials And Methods: Between 1.

[Sentinel lymph node biopsy in the breast carcinoma in clinical practice].

Aim: In the management of early breast carcinoma, biopsy of sentinel lymph nodes has gradually replaced dissection of Level I and II axillary nodes. The aim of the study is to assess feasability and reliability of the method in our conditions.

Method: From June 1998 to June 2007, a total of 458 sentinel node biopsies (SLNB) were performed.

[Benefits of intraoperative n. laryngeus recurrens neuromonitoring in thyroid surgery].

Introduction: N. laryngeus reccurens injury is a serious complication in thyroid surgery. Nerve visualization is a procedure preventing its traumatization.

[Distribution of metastatic affection in colorectal carcinoma using lymphatic mapping and radiation-navigated biopsy of the sentinel lymph node].

Aim: The aim is to define distribution of the lymphonode metastatic affection in colorectal carcinoma and to evaluate a new methodology of lymphatic mapping and the sentinel lymphonode detection during colorectal carcinoma procedures in practice. USED METHODS: A method of peroperative lymphatic mapping using a Patentblue method in vivo. Rectoscopic peritumoral application of a radiocoloid in a two-day or a single-day protocol, scintigraphy, peroperative quants of radioactivity detection using a gamma probe.

[Crossectomy--the most important step in varices surgery].

The authors present ethiology and aethilogy-based surgical techniques of the disorder on a group of 3458 patients operated for varices of lower extremities. Crossectomy is flashed out as a key moment of the procedure in cases of sapheno-phemoral junction insufficiencies. The results are presented on two patient groups comparing relaps rates of the disorder following completion of partial selective and radical complete crossectomies.

[Cavernous haemangioma of the small intestine leading to haemoperitoneum].

The authors present a case-review of a cavernous haemangioma of the small intestine as a cause of haemoperitoneum in a young female. The authors discuss the patient's history, completed examinations and surgical management of the case including a detailed histological examination of the intestinal resecate with cavernous haemangioma. Discussion includes literature data of the published case-reviews.

[Mini-invasive radiation-navigated parathyreoidectomy--MIRP].

Aim: The aim was to introduce a new surgical method and to verify its validity.

Methodology: In 20 patients whose ultrasound findings correlated with the MIBI scintigraphic results, a radiation-navigated parathyreoidectomy using a C-Track was conducted, following a radionucleotide application.

Results: From 2001 to 2003, 20 patients with hyperparathyreosis were operated.

[Lymphadenectomy in the early gastric carcinoma].

Aim: The method of extended lymphadenectomy in the early gastric carcinoma treatment remains controversial. The aim of this prospective study is to assess the above method feasibility with acceptable rates of complications, in our conditions.

Methodology: From 2000 to 2003, 11 patients with early carcinomas of the stomach were treated using the method of extended lymphadenectomy.

Spontaneous bacterial peritonitis in the Czech Republic: prevalence and aetiology.

The aim of the study was to determine the prevalence and detailed data concerning the incidence of spontaneous bacterial peritonitis in the Czech Republic. Ninety-nine patients with liver cirrhosis and ascites were examined. Spontaneous bacterial peritonitis was diagnosed in 35 patients (35.

[Spontaneous bacterial peritonitis in the Czech Republic].

The objective of the study was to assess the prevalence and more detailed data pertaining to the incidence of spontaneous bacterial peritonitis (SBP) in the Czech Republic. The authors examined 99 patients with cirrhosis of the liver and ascites. SBP was diagnosed in a high percentage--35 patients, i.