Helmet Radio Frequency Phased Array Applicators Enhance Thermal Magnetic Resonance of Brain Tumors.

Thermal Magnetic Resonance (ThermalMR) integrates Magnetic Resonance Imaging (MRI) diagnostics and targeted radio-frequency (RF) heating in a single theranostic device. The requirements for MRI (magnetic field) and targeted RF heating (electric field) govern the design of ThermalMR applicators. We hypothesize that helmet RF applicators (HPA) improve the efficacy of ThermalMR of brain tumors versus an annular phased RF array (APA).

Simultaneous thermal analysis of cationic, nonionic and anionic polyacrylamide.

Polyacrylamide (PAM) and its derivatives are the most commercially available water-soluble polymers and are frequently used for the production of clay-polymer composites. The characterization of their thermal behavior and decomposition was carried out mainly under reduced conditions by using N, He or Ar gas flow. The object of this study was to investigate the thermal decomposition of cationic (PAMCl), nonionic (PAM°), and anionic (NaPAM) polyacrylamide under synthetic air (SynA) in detail using a thermogravimetry/differential scanning calorimetry (TG/DSC) system connected to a quadrupole mass spectrometer (MS).

Everolimus in de novo kidney transplant recipients participating in the Eurotransplant senior program: Results of a prospective randomized multicenter study (SENATOR).

Early conversion to everolimus was assessed in kidney transplant recipients participating in the Eurotransplant Senior Program (ESP), a population in whom data are lacking. The SENATOR multicenter study enrolled 207 kidney transplant recipients undergoing steroid withdrawal at week 2 post-transplant (ClinicalTrials.gov [NCT00956293]).

Impact of Intrinsic Structural Properties on the Hydration of 2:1 Layer Silicates.

Several 2:1 layer silicates comprising di- and trioctahedral smectites of different layer charge between 0.2 and 0.4 per formula unit and a trioctahedral vermiculite were studied by an method that allowed Fourier transform infrared spectroscopy (FTIR) spectra and water vapor sorption isotherms to be obtained simultaneously.

Calcium Silicate Phases Explained by High-Temperature-Resistant Phosphate Probe Molecules.

In this work, high-temperature-resistant phosphate molecules are applied to characterize ultrathin (100 nm) calcium silicate (C-S) phases. These C-S phases are synthesized on silicon wafers, and the interaction of phosphates with the C-S phases is studied by means of in situ transmission Fourier transform infrared (FTIR) spectroscopy. At room temperature, the chemistry of the system is dominated by the formation of calcium phosphates (C-P).

[Minimally invasive video-assisted thyroidectomy: establishment in a thyroid center].

Background: This study retrospectively evaluated a series of patients who underwent minimally invasive video-assisted thyroidectomy (MIVAT) during the introduction stage of this surgical technique at the Martha-Maria Hospital in Nuremberg.

Patients And Methods: The eligibility criteria for MIVAT were a thyroid volume < 25 ml, nodules < 30 mm, no thyroiditis, no preoperative evidence of carcinoma and no previous neck surgery. A retrospective evaluation was performed together with a control group of patients who underwent conventional thyroid surgery during the same time period and included a follow-up for general patient satisfaction and cosmetic results.

P-Recovery from sewage by seeded crystallisation in a pilot plant in batch mode technology.

P-Recovery from actual sewage by P-RoC-technology (Phosphorus Recovery by Crystallisation of phosphate mineral phases from waste- and processwater) was studied in a pilot scale. Therewith the practicability of the pilot plant was tested and the quality of the so generated products was investigated.

Correlation between the extent of catalytic activity and charge density of montmorillonites.

The clay mineral montmorillonite is a member of the phyllosilicate group of minerals, which has been detected on martian soil. Montmorillonite catalyzes the condensation of activated monomers to form RNA-like oligomers. Extent of catalysis, that is, the yield of oligomers, and the length of the longest oligomer formed in these reactions widely varies with the source of montmorillonite (i.

Switchable waveguiding in two liquid-crystal-filled photonic crystal fibers.

Switchable waveguiding is investigated in two liquid-crystal-filled photonic crystal fibers with a solid core using the nematic liquid-crystal mixture E7 under planar and homeotropic anchoring conditions. Addressing experiments using ac voltages show polarization-dependent and -independent effects with response times down to a few ms. It is shown that the attenuation spectra of the two liquid-crystal-filled photonic crystal fibers can be changed dramatically by just varying the boundary conditions.

Infiltrated photonic crystal fiber: experiments and liquid crystal scattering model.

Experimental results obtained by means of a cut-back technique indicate low attenuations (< 1 dB x cm(-1)) for a solid core photonic crystal fiber filled with the nematic liquid crystal E7. These results observed in the visible wavelength range are compared with electromagnetic field simulations. The latter are carried out with a full vectorial finite element algorithm.

Cryogenic 35GHz pulse ENDOR probehead accommodating large sample sizes: Performance and applications.

The construction and performance of a cryogenic 35GHz pulse electron nuclear double resonance (ENDOR) probehead for large samples is presented. The resonator is based on a rectangular TE(102) cavity in which the radio frequency (rf) B(2)-field is generated by a two turn saddle ENDOR coil crossing the resonator along the sample axis with minimal distance to the sample tube. An rf power efficiency factor is used to define the B(2)-field strength per square-root of the transmitted rf power over the frequency range 2-180MHz.

New dielectric sensors and sensing techniques for soil and snow moisture measurements.

Measurements of material moisture are essential in fields such as agriculture or civil engineering. Electromagnetic techniques, more precisely dielectric methods, have gained wide acceptance in the last decades. Frequency or Time Domain methods take advantage of the high dielectric permittivity of water compared to dry materials.

International round-robin experiment to test the International Organization for Standardization total-scattering draft standard.

An international round-robin experiment has been conducted among laboratories in different countries to test the measurement and the data-analysis procedures in the International Organization for Standardization draft standard ISO/DIS 13696 for measuring total scattering from low-scatter laser optics. Ten laboratories measured total backscattering from high-reflectance mirrors, 50% beam splitters, and antireflection-coated windows. Results were sent to the Laser Zentrum Hannover, which acted as coordinator and analyzed all the backscattering data.

Differences in the coalescence kinetics of fat emulsions in dependence on the amount of fat and age.

The destabilizing effect of calcium ions on emulsions was studied as a function of the age of the emulsions and the degree of emulsion dilution (2%, 0.2% an 0.02% fat).

[Significance of uterine contractions for adaptation of the newborn infant before cesarean section].

Unlabelled: There are quite a few publications on the influence of labour on the adaptation of neonates after elective cesarean sections. Many authors recommend the induction of labor prior to the cesarean section. They found that this improves the adaptation of the infants.

[The value of aspiration cytology within the scope of triple diagnosis of palpable breast changes].

The diagnostic value of aspiration cytology and the overall diagnostic quality of the so-called triple test (aspiration cytology, mammography and physical examination) in the evaluation of palpable breast masses were investigated in a retrospective study. 608 histologically evaluated cancers and 224 benign lesions were investigated. A main purpose of the study was to find out whether the triple diagnostic test can replace surgical biopsy and thereby reduce the number of unnecessary biopsies.

[Twin pregnancy in uterus didelphys].

A case of twin pregnancy in uterus didelphys is reported. This rare event is discussed from obstetric aspects as well as that of dizygotic twins.