Differential force microscope for long time-scale biophysical measurements

Jason L. Choy, Sapun H. Parekh, Ovijit Chaudhuri, Allen P. Liu, Carlos Bustamante et al.
Force microscopy techniques including optical trapping, magnetic tweezers, and atomic force microscopy (AFM) have facilitated quantification of forces and distances on the molecular scale. However, sensitivity and stability limitations have prevented the application of these techniques to biophysica ... [Rev. Sci. Instrum. 78, 043711 (2007)] published Mon Apr 30, 2007.

Electrostatics of proteins in dielectric solvent continua. II. First applications in molecular dynamics simulations

Martina Stork and Paul Tavan
In the preceding paper by Stork and Tavan, [J. Chem. Phys. [bold 126], 165105 (2007)], the authors have reformulated an electrostatic theory which treats proteins surrounded by dielectric solvent continua and approximately solves the associated Poisson equation [B. Egwolf and P. Tavan, J. Chem. Phys ... [J. Chem. Phys. 126, 165106 (2007)] published Fri Apr 27, 2007.

Electrostatics of proteins in dielectric solvent continua. I. Newton's third law marries qE forces

Martina Stork and Paul Tavan
The authors reformulate and revise an electrostatic theory treating proteins surrounded by dielectric solvent continua [B. Egwolf and P. Tavan, J. Chem. Phys. [bold 118], 2039 (2003)] to make the resulting reaction field (RF) forces compatible with Newton's third law. Such a compatibility is require ... [J. Chem. Phys. 126, 165105 (2007)] published Fri Apr 27, 2007.

Unified description of poly- and oligonucleotide DNA melting: Nearest-neighbor, Poland-Sheraga, and lattice models

Ralf Everaers, Sanjay Kumar, and Christian Simm
We show that a simple lattice model can provide a unified description of the thermal denaturation of DNA oligomers and polymers. The model quantitatively reproduces experimental melting curves and reduces in limiting cases to the nearest-neighbor model and a suitable modified Poland-Sheraga model. O ... [Phys. Rev. E 75, 041918 (2007)] published Fri Apr 27, 2007.

Electrostatics of proteins in dielectric solvent continua. II. First applications in molecular dynamics simulations

Martina Stork and Paul Tavan
In the preceding paper by Stork and Tavan, [J. Chem. Phys. [bold 126], 165105 (2007)], the authors have reformulated an electrostatic theory which treats proteins surrounded by dielectric solvent continua and approximately solves the associated Poisson equation [B. Egwolf and P. Tavan, J. Chem. Phys ... [J. Chem. Phys. 126, 165106 (2007)] published Fri Apr 27, 2007.

Electrostatics of proteins in dielectric solvent continua. I. Newton's third law marries qE forces

Martina Stork and Paul Tavan
The authors reformulate and revise an electrostatic theory treating proteins surrounded by dielectric solvent continua [B. Egwolf and P. Tavan, J. Chem. Phys. [bold 118], 2039 (2003)] to make the resulting reaction field (RF) forces compatible with Newton's third law. Such a compatibility is require ... [J. Chem. Phys. 126, 165105 (2007)] published Fri Apr 27, 2007.

Visible Photoluminescence of Solid State Quercetin and Rutin

G. Zlateva, M. Mileva, and N. Popdimitrova
Quercetin is found in many foods, as well as in seeds, nuts, flowers, barks, and leaves. It is the most abundant of the flavonoid molecules. Rutin is the sugar-containing homologue of quercetin quercetin-3-rutinoside. Visible photoluminescence spectra of solid state quercetin and rutin are under at ... [AIP Conf. Proc. 899, 831 (2007)] published Fri Apr 27, 2007.

Electrochemical and Ellipsometrical Studies of the Adsorption Kinetics of Ferritin and Albumin on Gold Surface

L. S. Vladimirova and V. M. Savov
The kinetics of ferritin and albumin adsorption on gold (Au) surface is studied with electrochemical (impedance spectroscopy and cyclic voltammetry) and optical (ellipsometry) methods.The obtained results enable modelling of the protein adsorption on blood vessels and tissues in pathological process ... [AIP Conf. Proc. 899, 829 (2007)] published Fri Apr 27, 2007.

Sonography of Methotrexate for Ectopics

Denise Urzica and Dana-Ortansa Dorohoi
Treatment unruptured ectopic pregnancy with methotrexate (MTX) and citrovorum factor is now an established alternative to surgical therapy. Serial measurements of serum beta-HCG and early ultrasound examination have allowed detection of early and unruptured tubal ectopic pregnancies, permitting trea ... [AIP Conf. Proc. 899, 828 (2007)] published Fri Apr 27, 2007.

Impedance Phlebography for the Diagnosis of Venous Thrombosis

Denise Urzica and Dana-Ortansa Dorohoi
We used a noninvasive diagnostic technique, occlusive cuff impedance phlebography (IPG) for the diagnosis of deep venous thrombosis. Eleven patients were examined by IPG with overall diagnostic accuracy of 95% sensitivity, 81% specificity. Nine patients had symptoms suggestive of deep venous thromb ... [AIP Conf. Proc. 899, 827 (2007)] published Fri Apr 27, 2007.

Ultrasound Imaging Of Patients With Testicular Torsion

B. I. Tsekov, G. T. Clement, and V. M. Savov
... [AIP Conf. Proc. 899, 826 (2007)] published Fri Apr 27, 2007.

EPR Investigation of Gamma-Irradiated Rapana Thomasiana (Gastropoda, Muricidae) Shell

Emilia Dana Seletchi, Octavian G. Duliu, and Rodica Georgescu
The shell of Rapana Thomasiana snail, a carnivorous gastropod collected from the coasts of the Black Sea (Romania) was investigated by using Electron Paramagnetic Resonance (EPR) spectroscopy. The samples in powder form were irradiated with a [sup 60]Co gamma-ray source at ambient temperature in the ... [AIP Conf. Proc. 899, 825 (2007)] published Fri Apr 27, 2007.

Determination of Trace Elements in Chronic Obstructive Pulmonary Disease (COPD)

Saribal Devrim, Akyolcu Mehmet Can, and Aydemir Birsen
Many trace elements have activatory or inhibitory roles in enzyme activities and changes in hemorehology and relation of them with defense system molecules in diseases such as chronic obstructive pulmonary diseases (COPD). [bold Methods:] While, 25 male COPD patients (during acute attack) were taken ... [AIP Conf. Proc. 899, 824 (2007)] published Fri Apr 27, 2007.

Model explanation of DNA Transcription

V. Sajfert, Lj. Mašković, and D. Popov
Using the energy asymmetries in the hydrogen-bonded structures the model is formulated explaining further decay of DNA double chain and also explaining further decay of only one of obtained single chains. The model is similar to the Scott's model of alpha-helix where the spiral is substituted with i ... [AIP Conf. Proc. 899, 823 (2007)] published Fri Apr 27, 2007.

Medical Image Digitalization and Archiving Information System in Serbia

Vjekoslav Sajfert, Vladimir Milićević, Vesna Jevtić, and Višnja Jovanović
The paper gives a brief presentation of digital and archiving imaging system (PACS) with a survey of the main characteristics and development of the system worldwide as well as the possibilities and the area of its implementation in our conditions. We have given a proposition for digitalization and ... [AIP Conf. Proc. 899, 822 (2007)] published Fri Apr 27, 2007.

Concerning Some Diagnostic and Therapeutic Methods in Medical Physics Education

N. Popdimitrova, G. Zlateva, and A. Gegova
In Sofia Medical University the medical physics is strongly profiled. The purpose of this investigation was to evaluate and discuss the results from student's inquiry. (C)2007 American Institute of Physics ... [AIP Conf. Proc. 899, 821 (2007)] published Fri Apr 27, 2007.

The Effect of Selenium and +(-)Catechin on Lipid Peroxidation and Glutathione in Cadmium Fed Rats

Semra Ozdemir and Sefik Dursun
Cadmium performs its effect on living organisms by accumulating in various tissues and effects tissue antioxidant enzyme systems. The testes are critical target organ following cadmium exposure. The present study was planned to determine the possible protective roles of selenium and +() catechin aga ... [AIP Conf. Proc. 899, 820 (2007)] published Fri Apr 27, 2007.

High-Frequency Electrocardiography: Optimizing the Diagnosis of the Acute Myocardial Infarct with ST-Elevation

S. Naydenov, T. Donova, M. Matveev, A. Gegova, N. Popdimitrova et al.
The analysis of the received digital signal by computer microprocessor in high-frequency electrocardiography, used in our research, makes possible synthesis of vectorcardiographic images and loops, allowing improved qualitative and quantitative diagnosing of the myocardial injury. (C)2007 American I ... [AIP Conf. Proc. 899, 819 (2007)] published Fri Apr 27, 2007.

Phase Transitions In Model Lipid-Impregnated Filter Membranes

Efstathios K. Matsaridis, Georgi C. Angelov, and Varban M. Savov
Nitroacetate cellulose ultra filters impregnated with lipids or their derivatives could be effectively used as analogues of natural membranes. In this way some of their important properties can be successfully imitated. The model systems thus obtained give opportunity for investigation of different ... [AIP Conf. Proc. 899, 818 (2007)] published Fri Apr 27, 2007.

Radiation Interaction with Therapeutic Drugs and Cell Membranes

Diana I. Martin, Elena N. Manaila, Mihaela I. Moisescu, Tudor D. Savopol, Eugenia A. Kovacs et al.
This transient permeabilized state of the cell membrane, named the cell electroporation (CE) can be used to increase cells uptake of drugs that do not readily pass cell membrane, thus enabling their cytotoxicity. The anticancer drugs, such as bleomycin (BL) and cisplatin, are the most candidates for ... [AIP Conf. Proc. 899, 816 (2007)] published Fri Apr 27, 2007.

Effects of Electron Beam and Microwave Irradiation on Human Blood Proteins

Diana I. Martin, Dana E. Stan, Roxana R. Radu, Sabin A. Cinca, Irina D. Margaritescu et al.
The effects of separated and combined accelerated electron beam (EB) of 6.23 MeV and microwave (MW) of 2.45GHz irradiation on proteins in samples of human serum, human plasma and human integral blood are presented. Also, it was studied the effect of separate and combined EB and MW irradiation on pro ... [AIP Conf. Proc. 899, 815 (2007)] published Fri Apr 27, 2007.

Symptoms Experienced by Long Term Users of Mobil Phones

Nermin Kucer
In this study was investigated the possible effects of long term usage of mobile phone. The studied symptoms are headache, dizziness, extreme irritation, forgetfulness, neuropsychological discomfort, decrease of the reflex, clicking sound in the ears, and increase in carelessness. This survey study, ... [AIP Conf. Proc. 899, 814 (2007)] published Fri Apr 27, 2007.

Effect of Cigarette Smoking on Concentrations of Cadmium and Lead and on the Oxidative Damage in Human Spermatozoa

Ali Riza Kiziler, Birsen Aydemir, Ilhan Onaran, Bulent Alici, Hamdi Ozkara et al.
Cigarette smoking induced a significant oxidant effect to free radical-related male infertility. Semen and blood obtained from 50 subfertile men (n=26 smokers, n=24 nonsmokers) and from 45 fertile men (n=23 smokers, n=22 nonsmokers) volunteers were examined. The levels of ROS, MDA and protein carbon ... [AIP Conf. Proc. 899, 813 (2007)] published Fri Apr 27, 2007.

Investigation of Trace Element Concentrations in Tumor Tissues of Patients with Laryngeal Carcinoma

Kacakci Aysun, Toplan Selmin, Aydemir Birsen, and Aslan Osman
Larynx cancer is one of the most frequently seen cancer type between head and neck cancers. Even thought the effective mechanisms in cancer development are not well describe, it is accepted that the effect of some elements carry out important etiology in carcinogenesis. In present study we investiga ... [AIP Conf. Proc. 899, 812 (2007)] published Fri Apr 27, 2007.

Study of the Molecular Structure of Some Peptides with Physiological Effects on the Activation of Ca[sup 2 + ] Release and Current Flow through Single Ryanodine Receptor Channels

J. J. Abramson, B. Marinov, and D. A. Iordache
The study of the contributions of different amino acids to the physiological effects of certain peptides on the activation Ca[sup 2+] release and to the current flow through single Ryanodine receptor channels pointed out the connection between the molecular structure and the physiological effects pr ... [AIP Conf. Proc. 899, 811 (2007)] published Fri Apr 27, 2007.

On Biospeckle Size Analysis Technique in Particle Concentration and Size Assessment

Dan Chicea
When coherent light crosses a medium having biological cells as scattering centers in suspension a speckled image is obtained in the far field, called biospeckle. Speckle size can bring information on the scattering media. The scattering media were diluted milk and urine. Digital image files were re ... [AIP Conf. Proc. 899, 809 (2007)] published Fri Apr 27, 2007.

A Possible Application of Coherent Light Scattering on Biological Fluids

Dan Chicea and Liana Maria Chicea
Human urine from both healthy patients and patients with different diseases was used as scattering medium in a coherent light scattering experiment. The time variation of the light intensity in the far field speckle image was acquired using a data acquisition system on a PC and a time series resulte ... [AIP Conf. Proc. 899, 808 (2007)] published Fri Apr 27, 2007.

Investigation of Renal Stones by X-ray and Neutron Diffraction

M. Baeva, A. I. Beskrovnyi, A. Boianova, and I. Shelkova
Renal stones were investigated by X-ray diffraction. The obtained results showed only one crystal phase in every sample. With the aim to verify eventual availability of second phase (under 3 volume %) the same renal stones were investigated by neutron diffraction. The neutron spectra proved that add ... [AIP Conf. Proc. 899, 807 (2007)] published Fri Apr 27, 2007.

Impact of Testosterone, Zinc, Calcium and Magnesium Concentrations on Sperm Parameters in Subfertile Men

Birsen Aydemir, Ali Riza Kiziler, Ilhan Onaran, Bulent Alici, Hamdi Ozkara et al.
To investigate the impact of testosterone, zinc, calcium and magnesium concentrations in serum and seminal plasma on sperm parameters. There were significant decrease in sperm parameters, serum and seminal plasma zinc levels in subfertile males. It indicates zinc has a essential role in male inferti ... [AIP Conf. Proc. 899, 806 (2007)] published Fri Apr 27, 2007.

Microbial Safety Improvement of Sea Buckthorn by Electron Beam Irradiation

Monica R. Nemtanu, R. Minea, Elena Mazilu, and Nora Radulescu
The commercialization of medicinal plants and/or their products is highly increased in Romania lately. One of the most used herbs is sea buckthorn being well known for its quality with a large potential for curing some diseases. Sea buckthorn can be contaminated with undesirable microorganisms which ... [AIP Conf. Proc. 899, 792 (2007)] published Fri Apr 27, 2007.

Electron Beam Sterilization of the Plates with Agaroze Gel Used for Electrophoresis

Daniel I. Ighigeanu, Diana I. Martin, Dana E. Stan, Constantin I. Matei, Elena M. Manaila et al.
Electron beam (EB) sterilization applied to the plastic plates with agarose gel used for electrophoresis is presented. The effects of EB irradiation upon the agarose gel and on the process of the proteic fraction separation have been investigated. The investigation were focused on the concentration ... [AIP Conf. Proc. 899, 781 (2007)] published Fri Apr 27, 2007.

Some Radiation Techniques Used in the GU-3 Gamma Irradiator

Andon Dodbiba, Ariana Ylli, Iliriana Stamo, and Efigjeni Kongjika
Different radiation techniques, measurement of dose and its distibution throughout the irradiated materials are the main problems treated in this paper. The oscillometry method combined with the ionization chamber, as an absolute dosimeter, is used for calibration of routine ECB dosimeters. The dose ... [AIP Conf. Proc. 899, 776 (2007)] published Fri Apr 27, 2007.

Vaccine Biotechnology by Accelerated Electron Beam and Microwave Irradiation

Gabriela D. Craciun, Iulian I. Togoe, Laurentiu M. Tudor, Diana I. Martin, Elena N. Manaila et al.
A new biotechnology for obtaining a commercial vaccine that contains either Fusobacterium necrophorum (F.n.) exotoxins inactivated by accelerated electron beam (EB) and microwave (MW) irradiation, or exotoxins isolated from F.n. cultures irradiated with EB+MW, is presented. This vaccine is designed ... [AIP Conf. Proc. 899, 769 (2007)] published Fri Apr 27, 2007.

Indoor Radon Measurement in Van

E. Kam, A. E. Osmanlioglu, I. Dogan, and N. Celebi
In this study, indoor radon concentrations obtained from the radon surveys conducted in the Van. Radon monitoring was performed by applying a passive, time-integrating measuring technique. For this purpose, CR-39 nuclear track detectors were installed in dwellings for 2 months. After the monitoring ... [AIP Conf. Proc. 899, 736 (2007)] published Fri Apr 27, 2007.

A Recent Study on [sup 137]Cs Activities in Surface Soils over the Eastern Part of the Black Sea Coast of Turkey

S. Duran, R. T. Guray, C. Yalcin, and N. Ozkan
In this study, [sup 137]Cs specific activities were measured in surface soil samples collected from undisturbed areas over the eastern part of the Black Sea coast line of Turkey, between Trabzon and Hopa, in August 2004 and January 2005. A total number of 41 surface soil samples were counted using a ... [AIP Conf. Proc. 899, 731 (2007)] published Fri Apr 27, 2007.

Ultrasonic Imaging of an Object with Complicated Shape at the Presence of Fourier and Non-Fourier Series in the Transmitted through the Object Acoustic Field

A. I. Andreeva, M. T. Burova, and J. I. Burov
The ultrasonic imaging attained a special importance in all science areas during the recent years. The development of this area is stimulated by the creation of flexible systems using acoustic phase array (matrix) technology. It is of great importance for applications in the systems for imaging of h ... [AIP Conf. Proc. 899, 713 (2007)] published Fri Apr 27, 2007.

Equivalent Dose Determination Using Components of IRSL Decay Curves

G. Tanir and M. H. Bolukdemir
To determine the equivalent dose (ED) using conventional methods any part (or all) of the optically stimulated luminescence (OSL) decay curve can be chosen as representative luminescence signal. Recently several studies investigated the shape of OSL decay curves and showed that the luminescence emis ... [AIP Conf. Proc. 899, 528 (2007)] published Fri Apr 27, 2007.

Energetic and Informative Interaction of Microwaves with Neurons and Enzymes

A. A. Maharramov, S. N. Babazade, E. Yu. Yusifov, and A. M. Gajiyev
Besides Purkinje Cells (PC) in cat cerebellum, experiments on Microwave-Living System interaction have been performed on some antioxidant enzymes Super oxide dismutase (SOD), Catalase (C) and Glutathione peroxidase (GP) in the eye structures (pigment epithelium and neuronal structure retina) in fr ... [AIP Conf. Proc. 899, 473 (2007)] published Fri Apr 27, 2007.

Decimetre Waves and Cerebellar Cortex Key Element --- Purkinje Cells

Akif A. Maharramov
Acute experiments have been carried out on both decerebrated and anaesthetized adult cats exposed to Decimetre Range Microwaves (DRM) (lambda=65 cm, duration of exposition 10 min., at least) by the help of a 2 cm radius contact applicator located on the temple part of the head with cerebellum in the ... [AIP Conf. Proc. 899, 471 (2007)] published Fri Apr 27, 2007.

Fluorescent Endoscopy of Tumors in Upper Part of Gastrointestinal Tract

E. Borisova, B. Vladimirov, I. Angelov, and L. Avramov
In the recent study delta-aminolevulinic acid/Protoporphyrin IX (5-ALA/PpIX) is used as fluorescent marker for dysplasia and tumor detection in esophagus and stomach. The 5-ALA is administered per os six hours before measurements at dose 20mg/kg weight. High-power light-emitting diode at 405 nm is u ... [AIP Conf. Proc. 899, 467 (2007)] published Fri Apr 27, 2007.

Fluorescence Spectroscopy Investigations of Cutaneous Tissues

E. Borisova, I. Bliznakova, N. Momchilov, P. Troyanova, and L. Avramov
Fluorescence Spectroscopy of the human skin is very prominent for early diagnosis and differentiation of cutaneous diseases. Selection of proper excitation sources and sensitive detectors gives wide range of possibilities related to real-time determination of existing pathological conditions. A prob ... [AIP Conf. Proc. 899, 465 (2007)] published Fri Apr 27, 2007.

Evaluation of hyperaccumulator plant species grown in metalliferous sites in Albania

F. Babani, N. Civici, A. Mullaj, E. Kongjika, and A. Ylli
Heavy metal contamination of soils causes serious problems to our society. A small number of interesting plant species have been identified that can grow in soils containing high levels of heavy metals, and can also accumulate these metals to high concentrations in the shoot. The heavy metal content ... [AIP Conf. Proc. 899, 463 (2007)] published Fri Apr 27, 2007.

Multiple Image Radiography With Diffraction Enhanced Imaging For Breast Specimen

Oral Oltulu, Zhong Zhong, Moumen Hasnah, and Dean Chapman
Biological samples are of great interest for many imaging techniques. The samples usually contain small structures and weak absorption properties. The combinations of weak signals with overlying structures make feature recognition difficult in many cases. In the x-ray regime, a relatively new imagin ... [AIP Conf. Proc. 899, 451 (2007)] published Fri Apr 27, 2007.

Earth's Magnetic Field Detection in the Course of Plant Growth

Akif A. Maharramov
Chickpea seeds put in a plastic container of a size enough for the seeds to grow without hindered by the container walls were kept under control. The container contained water in it at a level enough to cover the upper parts of the seeds, serving as an experimental group, but another container like ... [AIP Conf. Proc. 899, 403 (2007)] published Fri Apr 27, 2007.

Static Magnetic Field and Plant Growth

Akif A. Maharramov
In the conditions of stable existence of Static Magnetic Field (SMF) the growth processes of some plants' (chickpeas, beans and lentils) seeds have been investigated in different temperatures of microenvironment. It has been established that the rate of the plant growths is affected (speeded up) by ... [AIP Conf. Proc. 899, 401 (2007)] published Fri Apr 27, 2007.

Environmental Radioactivity Measurements in Harran Plain of Sanliurfa, Turkey

A. Bozkurt, N. Yorulmaz, and E. Kam
This study aims to assess the environmental radioactivity levels of Harran Plain located within the boundaries of the south-eastern province of Sanliurfa, Turkey. In addition to being at the center of Turkey's major irrigation and development project (South Eastern Anatolian Project, GAP), this 1500 ... [AIP Conf. Proc. 899, 397 (2007)] published Fri Apr 27, 2007.

Indoor Radon Measurement In The City Of Edirne, Turkey

A. Bozkurt and E. Kam
This study assesses the indoor radon concentrations for the city of Edirne situated in the European part of Turkey (Eastern Thrace). A total of 88 CR-39 nuclear track detectors were kept in basements of the selected apartment buildings and houses for passively determining the indoor radon levels of ... [AIP Conf. Proc. 899, 395 (2007)] published Fri Apr 27, 2007.

Monitoring noise-resonant effects in cancer growth influenced by external fluctuations and periodic treatment. (arXiv:0710.1317v3 [physics.bio-ph] UPDATED)

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