The Biopolymer Active Surface for Optical Fibre Sensors.

Optical fibre sensors have the potential to be overly sensitive and responsive, making them useful in various applications to detect the presence of pollutants in the environment, toxic gasses, or pesticides in soil. Deoxyribonucleic acid (DNA) as biopolymer active surfaces for fibre sensors can be designed to detect specific molecules or compounds accurately. In the article, we propose to use an optical fibre taper and DNA complex with surfactant-based sensors to offer a promising approach for gas detection, including ammonia solution, 1,4 thioxane, and trimethyl phosphate imitating hazardous agents.

Optical Properties of a Tapered Optical Fiber Coated with Alkanes Doped with FeO Nanoparticles.

The presented research shows the possibilities of creating in-line magnetic sensors based on the detection of changes of light propagation parameters, especially polarization, obtained by mixing FeO nanoparticles with hexadecane (higher alkane) surrounding a biconical optical fiber taper. The fiber optic taper allows to directly influence light parameters inside the taper without the necessity to lead the beam out of the structure. The mixture of hexadecane and FeO nanoparticles forms a special cladding surrounding a fiber taper which can be controlled by external factors such as the magnetic field.

Polymer Microtip on a Multimode Optical Fiber as a Threshold Volatile Organic Compounds Sensor.

Polymer microtips are 3D microstructures manufactured on the end face of an optical fiber by using the photopolymerization process. Such micro-optic elements made on a multi-mode optical fiber were previously tested as a transducer of refractive index sensor. These studies were an inspiration to investigate the possibility of using this type of transducer to measure the presence of volatile organic compounds in the air.

Detection of Organosulfur and Organophosphorus Compounds Using a Hexafluorobutyl Acrylate-Coated Tapered Optical Fibers.

This paper presents the results of a study on the possibility of detecting organosulfur and organophosphorus compounds by means of polymer-assisted optical fiber technology. The detection of the aforementioned compounds can be realized by fabricating a polymer-coated tapered optical fiber (TOF), where the polymer works as an absorber, which changes the light propagation conditions in the TOF. The TOFs were manufactured based on a standard single-mode fiber for telecommunication purposes and, as an absorbing polymer, hexafluorobutyl acrylate was used, which is sensitive to organosulfur and organophosphorus compounds.

Modification of Higher Alkanes by Nanoparticles to Control Light Propagation in Tapered Fibers.

This study presents the doping of higher alkanes, namely, pentadecane (C15) and hexadecane (C16), with ZnS:Mn nanoparticles to create new types of in-line optical fiber sensors with unique optical properties. In this research, the phenomenon of light beam leakage out of the taper and its interaction with the surrounding materials is described. The fabricated new materials are used as cladding in a tapered optical fiber to make it possible to control the optical light beam.

Technology of Polymer Microtips' Manufacturing on the Ends of Multi-Mode Optical Fibers.

The technology of polymer microtips' manufacturing on the ends of selected multi-mode fibers has been reported. The study's key element was an extended description of technology parameters' influence on the shape of these 3D microstructures. Basic technology parameters such as spectral characteristics of the light source, monomer mixture type, optical power, and exposure time were taken under consideration.

[Obesity as a factor in the development of cancer in type 2 diabetes].

Aim: The aim of this study was to evaluate the prevalence of malignant tumors in patients with type 2 diabetes and the factors contributing to the development of cancer.

Materials And Methods: Medical records of 1087 patients with type 2 diabetes were retrospectively analyzed and a group of 74 (6.8%) patients with malignant tumor were found during treatment of diabetes.

[Assess the impact of concentrations of inflammatory markers IL-6, CRP in the presence of albuminuria in patients with type 2 diabetes].

Unlabelled: Diabetic nephropathy is one of the most common complications of diabetes. Symptom of nephropathy is albuminuria, in which the mechanism of formation may participates CRP and IL-6. The aim of the study was to evaluate the concentrations of CRP and IL-6 depending on the irregularity of metabolic patients with type 2 diabetes and their impact on the occurrence of albuminuria.

[Platelets activation in depending on glycaemic control in diabetes type 2].

Unlabelled: Both metabolic and heamodynamic disorders accompany diabetes. Inadequate control of glycaemia, glication proteins and oxidative stress causes chronic thromboembolic and atherothrombosis complications. Disorders which are observed in diabetes induce intravascular platelets activation and changes with platelets' morphologic parameters.

[The relations between platelet count, mean platelet volume and HbA1C in patients with type 2 diabetes].

Considerable interest experimental and clinical researches has been focused on important role of advanced glication and its products and oxidative stress on the structure and functional disorders of platelets in diabetes. The aim of the study of our work was an estimate of platelet count (PLT) and mean platelet volume (MPV) for diabetics and control subjects and diabetics depending on glycated haemoglobin. In patients with type 2 diabetes mellitus, the platelet count was 216.

[Hyponatremia in syndrome of inappropiate antidiuretic hormone secretion--cases report].

Syndrome of Inappropriate Antidiuretic Hormone Secretion (SIADH) is a rare disease characterized by hyponatremia and hyperosmolality of urine. There are well known causes of this syndrome, such as neoplasmatic processes, different disorder of central nervous system, lung diseases and side effects various drugs. In differential diagnosis of this syndrome we ought to consider renal failure, adrenocortical deficiency (Addison's disease), hypothyroidism, different forms of hyponatremia as well as pseudohyponatremia.

[Early diagnosis of bladder carcinoma].

Asymptomatic erythrocyturia is an early symptom of urinary tracts and kidney diseases, including bladder carcinoma. The aim of the research was to compare the diagnostic validity of the cytological urine analysis and the DNA flow cytometry in detecting cancer cells in urine and bladder washings, taken from patients with asymptomatic erythrocyturia, as an early symptom of the bladder carcinoma in situ. The research was conducted on a group of 48 patients (32 male, 16 female, aged 28-55) with asymptomatic erythrocyturia, caused, in 16 cases, by bladder carcinoma in situ, in 18 cases, by bladder carcinoma in situ with urinary tracts infection, and in 14 cases, by the infection alone.

[Serious course of sepsis in diabetic patients].

Unlabelled: The aim of the study was to evaluate the frequency and the course of sepsis in the patients treated in our ward. Retrospective evaluation was conducted on a group of 7418 patients hospitalized in 2001-2005. Serious sepsis was found in 15 patients (0.