Anomalous Zeeman response in coexisting phase of superconductivity and spin-density wave as a probe of extended ss-wave pairing structure in ferro-pnictide

In several members of the ferro-pnictides, spin density wave (SDW) order coexists with superconductivity over a range of dopings. In this letter we study the anomalous magnetic Zeeman response of this coexistence state and show that it can be used to confirm the extended s-wave gap structure as well as structure of superconducting (SC) gap in coexisting phase. On increasing the field, a strongly anisotropic reduction of SC gap is found. The anisotropy is directly connected to the gap structure of superconducting phase. The signature of this effect in quasiparticle interference measured by STM, as well as heat transport in magnetic field is discussed. For the compounds with the nodal SC gap we show that the nodes are removed upon formation of SDW. Interestingly the size of the generated gap in the originally nodal areas is anisotropic in the position of the nodes over the Fermi surface in direct connection with the form of SC pairing.Comment: 5 pages, 2 figure

Serum level of lactate dehydrogenase, homocystein, hemoglobin and platelet in preeclampsia

Objectives: Pre-eclampsia affects approximately 5-8% of pregnant women. The aim of this study was to compare the serum level of Lactate dehydrogenase (LDH), Homocystein, Hemoglubin and platelet in pregnant women diagnosed as pre-eclampsia and a normal group in Gorgan city, Northeastern Iran from 2007-2008. Methodology: In this case control study, 50 cases of pre-eclampsia were compared with the control group women hospitalized in Dezyani hospital. Pre-eclampsia criteria were: Blood pressure more than or equal to 140/90 mm hg and Proteinuria greater or equal to 300 mg/ 24 hours urine sample in the third trimester. Hemoglobin, platelet, LDH and hemocystein were measured. Data were analyzed by the mean of SPSS-14 program & Chi-2 or t-student were used. Results: The difference of BMI and family incomes was significant between two groups (P-value0.01). Hemocystein level was more than normal range in five patients with pre-eclampsia (P-value<0.001). Conclusions: In this study, hemocystein level was significantly higher in pre-eclampsia patients but LDH, hemoglobin and platelet level had no significant difference

In vitro inhibition of Helicobacter pylori urease with non and semi fermented Camellia sinensis

Purpose: Helicobacter pylori is the etiological agent in duodenal and peptic ulcers. The growing problem of antibiotic resistance by the organism demands the search for novel compounds, especially from natural sources. This study was conducted to evaluate the effect of Camellia sinensis extracts on the urease enzyme that is a major colonization factor for H. pylori. Methods: Minimum inhibitory concentrations of nonfermented and semifermented C. sinensis methanol: water extracts were assessed by broth dilution method. Examination of the urease function was performed by Mc Laren method, and urease production was detected on 12% SDS polyacrylamide gel electrophoresis from whole cell and membrane bound proteins. Results: Both extracts had inhibitory effects against H. pylori and urease production. At a concentration of 2.5 mg/ml of nonfermented extract and 3.5 mg/ml of semifermented extract the production of Ure A and Ure B subunits of the urease enzyme were inhibited completely. A concentration of 4 mg/ml of nonfermented and 5.5 mg/ml of semifermented extract were bactericidal for H. pylori. Conclusions: C. sinensis extracts, especially the nonfermented, could reduce H. pylori population and inhibit urease production at lower concentrations. The superior effect of nonfermented extract is due to its rich polyphenolic compounds and catechin contents

Convergence science in the Anthropocene: Navigating the known and unknown

Rapidly changing ecological and social systems currently pose significant societal challenges. Navigating the complexity of social-ecological change requires ap- proaches able to cope with, and potentially solve, both foreseen and unforeseen societal challenges. The emergent field of convergence addresses the intricacies of such challenges, and is thus relevant to a broad range of interdisciplinary issues. This paper suggests a way to conceptualize convergence research. It discusses how it relates to two major societal challenges (adaptation, transformation), and to the generation of policy-relevant science. It also points out limitations to the further development of convergence research

Comparison of ferment sugars, produce hemolysis and measuring growth in methicillin-resistant and methicillin-sensitive Staphylococcus aureus isolates from inpatients and healthcare workers in Gorgan Hospitals, North of Iran

The mec A gene in Staphylococcus aureus leads to production of new penicillin-binding protein called PBP2a.This change may follow some changes in other phenotypes. The aim of this study was the comparison of Ferment Sugars, Produce Hemolysis and Measuring Growth in MRSA and MSSA isolates. 188 Staphylococcus aureus isolates separated from inpatients and healthcare workers (healthy carriers)were studied.Bacterialcultures in blood agar environment at 37°C during 24h and at 4°C during other 24h were applied for studying hemolysis. Sugar fermentation carried out in phenol red Broth medium, containing glucose, galactose, arabinose, fructose, xylose, ramnose, mannose, sucrose, trehalose, raffinose or maltose. For determining bacterial growth,bacterial concentration of 103was taken each hour during 12 cultured in MHAand colonies were counted after 24h.The mean amount of hemolysis diameter in MRSA isolates was rather more than that of MSSA isolates. The difference between MRSA and MSSA isolates were significant as to fermenting ramnose, trehalose, galactose and xylose. The mean rate of growth in MRSAwere significantly different from that of MSSAisolates (p&lt;0.05).Resistance to methicillin in Staphylococcus aureus isolates accompanies the increase of ability to ferment sugars. This phenomenon may be one of reasons for increased pathogenicity of MRSA isolates; So results shows the logarithmic phase is longer in MRSA isolates, This may implicate that PBP2a production in methicillin-resistant isolates follows slowing down nutrients entrance into the bacterium that in turn may causes slow growth

catena-Poly[[lead(II)-bis­(μ2-quinolin-8-ol­ato)-κ3 N,O:O;κ3 O:N,O] N,N-di­methyl­formamide hemisolvate]

The asymmetric unit of the title compound, {[Pb(C9H6NO)2]·0.5C3H7NO}n, comprises Pb(quinolate)2 and half a dimethyl­formamide mol­ecule (which is disordered about a centre of inversion). The quinolate ligands N,O-chelate to a PbII ion and simultaneously bridge a neighbouring PbII ion to form a polymeric chain along [100] comprising Pb-linked Pb2O2 distorted rhombi. These chains pack to form a square grid, with the channels thus defined occupied by the disordered solvent mol­ecules

Interacting potential between spinons in the compact QED3 description of the Heisenberg model

We implement a Chern-Simons (CS) contribution into the compact QED3 description of the antiferromagnetic Heisenberg model in two dimensions at zero temperature. The CS term allows for the conservation of the SU(2) symmetry of the quantum spin system and fixes the flux through a plaquette to be a multiple of pi as was shown by Marston. We work out the string tension of the confining potential which acts between the spinons and show that the CS term induces a screening effect on the magnetic field only. The confining potential between spinons is not affected by the CS flux. The strict site-occupation by a single spin 1/2 is enforced by the introduction of an imaginary chemical potential constraint.Comment: 8 page

{2,2′-[o-Phenyl­enebis(nitrilo­methanylyl­idene)]diphenolato-κ4 O,N,N′,O′}nickel(II) monohydrate

The NiII atom in the title monohydrate, [Ni(C20H14N2O2)]·H2O, is coordinated within a cis-N2O2 square-planar donor set provided by the tetra­dentate Schiff base ligand. Overall, the mol­ecule has a curved shape with the dihedral angle formed between the planes of the outer benzene rings being 13.92 (18)°. The water mol­ecule was found to be disordered over two positions [ratio 0.80 (1):0.20 (1)] and the major component is linked to the complex via an O—H⋯O hydrogen bond

{5,5′-Dimeth­oxy-2,2′-[1,1′-(2,2-dimethyl­propane-1,3-diyldinitrilo)­diethyl­idyne]diphenolato-κ4 O,N,N′,O′}copper(II) monohydrate

The tetra­dentate dianion in the title complex hydrate, [Cu(C23H28N2O4)]·H2O, provides the CuII atom with a cis-N2O2 donor set. There is a significant twist from a regular square-planar geometry with the dihedral angle formed between the two six-membered CuOC3N chelate rings being 32.14 (8)°. The water mol­ecule forms hydrogen bonds to each of the coordinating O atoms of a given complex mol­ecule. Supra­molecular layers in the bc plane are formed in the crystal packing through C—H⋯O and C—H⋯π inter­actions

Providing an Efficient Model for Wireless Sensor Networks Using the Scenario of the Variable Sink Counts Based on the Particle Swarm Algorithm

Introduction. A wireless sensor network is a set of independent sensor nodes, which are dispersed in a distributed manner to monitor and collect data in a geographic environment. One of these problems is the manner of node division in a set of multi-sink sensors. Problem Statement. In fact, the main issue in this area is related to the division of sensor nodes between sinks so that re duced energy consumption and increased network life survival will be resulted. In this study, a solution has been provided to partition a multi-sink sensor network. Due to the nature of the problem of partitioning a multi-sink sensor network, the search space is very extensive and, on the other hand, proving that this issue is classified as NP-hard problems has made the presentation of a definitive solution very difficult. Purpose. To develop a solution for distribution of sensor network with a few sinks. Materials and Methods. Thus, given the broad search space of the problem ahead, particle swarm algorithm has been selected. In order to evaluate the proposed approach, MATLAB programming language has been applied. Results. The proposed approach has been developed using the criteria of hop counts to the sink and also the number of cluster heads plus the power of particle search in particle swarm algorithm. Conclusions. Study of these results in the form of two criteria of hop counts and the number of cluster heads using the scenario of the variable sink counts demonstrate that in the desired scenario, the proposed approach has been able to improve hop counts relative to the base method by 17% and the number of cluster heads by 59%.Вступ. Бездротова сенсорна мережа — це набір незалежних сенсорних вузлів, які розподілені певним чином для моніторингу та збору даних в географічному середовищі. Одним з їхніх функціональних завдань є спосіб розподілу вузлів у наборі датчиків з декількома стоками. Проблематика. Основна проблема в цій галузі пов’язана з розділенням вузлів датчиків між стоками, що дозволить знизити споживання енергії та збільшити термін служби мережі. У зв’язку з природою проблеми розбиття сенсорної мережі з декількома стоками, пошуковий простір є надто великим і, з іншого боку, доведення того, що ця задача є NP-складною проблемою, зробило представлення остаточного рішення дуже складним. Мета. Розробка рішення розподілу сенсорної мережі з декількома стоками. Матеріали й методи. З огляду на широкий простір пошуку, в роботі використано алгоритм рою частинок. Для оцінки запропонованого підходу застосовано мову програмування MATLAB. Результати. Запропонований підхід було розроблено з використанням критеріїв підрахунку кількості транзитних ділянок до стоку, а також кількості головок кластера сумарно з потужністю пошуку частинок в алгоритмі рою частинок. Висновки. Вивчення отриманих результатів у вигляді двох критеріїв підрахунку кількості транзитних ділянок та кількості головок кластера з використанням сценарію змінної кількості стоків свідчить, що запропонований підхід дозволив поліпшити кількість транзитних ділянок відносно базового методу на 17 %, а кількість головок кластера — на 59 %.Введение. Беспроводная сенсорная сеть — это набор независимых сенсорных узлов, которые распределены определенным образом для мониторинга и сбора данных в географической среде. Одной из их функциональных задач является способ распределения узлов в наборе датчиков с несколькими стоками. Проблематика. Основная проблема в этой области связана с разделением узлов датчиков между стоками, что позволит снизить потребление энергии и увеличить срок службы сети. В связи с природой проблемы разбиения сенсорной сети с несколькими стоками, область поиска является слишком большой и, с другой стороны, доказательства того, что эта задача является NP-сложной проблемой, сделало представление окончательного решения очень сложным. Цель. Разработка решения распределения сенсорной сети с несколькими стоками. Материалы и методы. Учитывая обширную область поиска, в работе использован алгоритм роя частиц. Для оценки предложенного подхода применены язык программирования MATLAB. Результаты. Предложенный подход был разработан с использованием критериев подсчета количества транзитных участков к стоку, а также количества головок кластера суммарно с мощностью поиска частиц в алгоритме роя частиц. Выводы. Изучение полученных результатов в виде двух критериев подсчета количества транзитных участков и количества головок кластера с использованием сценария переменного количества стоков свидетельствует, что предложенный подход позволил улучшить количество транзитных участков относительно базового метода на 17 %, а количество головок кластера — на 59 %