bluuebunny/crossref_metadata_2025_split huggingface dataset:
The 3D Channel Framework Based on Indium(III)–btec, and Its Ion‐Exchange Properties (btec = 1,2,4,5‐Benzenetetracarboxylate)
Authors: Lin Zheng‐zhong , Jiang Fei‐long , Yuan Da‐qiang , Chen Lian , Zhou You‐fu , Hong Mao‐chun 
Published: May 2005

AbstractHydrothermal reactions of InCl3 with pyromellitic dianhydride and pyridine derivatives produce three coordination polymers: {(HL)[In3(btec)2(OH)2]·L}n [btec = 1,2,4,5‐benzenetetracarboxylate, L = 2‐picoline (1), L = 4‐picoline (2)] and {(Hdpea)[In3(btec)2(OH)2]}n [dpea = 1,2‐bis(4‐pyridyl)ethane] (3). Single crystal X‐ray diffraction and powder X‐ray diffraction analyses reveal that compounds 1–3 are isostructural and possess the same 3D framework as 1D open channels. Thermal gravimetric studies show that compounds 1–3 are stable up to 300 °C. The guests of the protonated pyridine derivatives located at the channels in 1 and 2 can be fully exchanged by Ca2+ and Ba2+ ions. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)
Synthesis and Structure of the First η3‐1,2‐Diphosphaallyl Complexes [(η5‐C5H5)(CO)2M{η3‐RPPC(SiMe3)2}] (M = Mo, R = tBu, Cy; M = W, R = tBu) from [(η5‐C5H5)(CO)2M=P=C(SiMe3)2] (M = Mo, W) and Inversely Polarized Phosphaalkenes RP=C(NMe2)2 (R = tBu, Cy)
Authors: Weber Lothar , Noveski Gabriel , Lassahn Ulrich , Stammler Hans‐Georg , Neumann Beate 
Published: May 2005

AbstractReaction of [(η5‐C5H5)(CO)2M=P=C(SiMe3)2] [where M = Mo (2), W (5)] with the phosphaalkene tBuP=C(NMe2)2 (1a) afforded the η3‐1,2‐diphosphaallyl complexes [(η5‐C5H5)(CO)2M{η3‐tBuPPC(SiMe3)2}], [where M = Mo (3a); M = W (6)]. Similarly, 2 and CyP=C(NMe2)2 (1b; where Cy = cyclohexyl) gave rise to the formation of [(η5‐C5H5)(CO)2Mo{CyPPC(SiMe3)2}] (3b) by a phosphinidene transfer process. Small amounts of [{η5‐C5H5)(CO)2Mo}2{η2:η2‐Cy3P5}] (4) were formed as a minor product. However, treatment of 2 and 5 with HP=C(NMe2)2 (1c) yielded the complexes [(η5‐C5H5)(CO)2M{η2‐(Me3Si)2CH–P=P–C(NMe2)2}] [where M = Mo (9), W (10)]. The novel compounds 3a, 3b, 9 and 10 were characterized by means of spectroscopy (IR, 1H, 13C{1H}, 31P{1H} NMR, MS). Moreover, the molecular structures of 3a, 3b, 4, 6 and 10 were determined by X‐ray diffraction analysis. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)
Facile Catalytic Decomposition at Low Temperature of Energetic Ionic Liquid as Hydrazine Substitute
Authors: Courthéoux Laurence , Amariei Dan , Rossignol Sylvie , Kappenstein Charles 
Published: May 2005

AbstractPlatinum supported on doped alumina catalysts were prepared and evaluated for the decomposition of NH3OHNO3/water energetic liquid. Powdered and shapedcatalysts remain active after 23 injections at 45 °C. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)
Facile and Sensitive Spectrophotometric Determination of Propoxur in Formulations and Environmental Samples
Authors: Kumar Kailasa Suresh , Suvardhan Kanchi , Rekha Dasari , Jayaraj B. , Chiranjeevi Pattium 
Published: May 2005

AbstractA facile, rapid, and sensitive spectrophotometric method for the determination of propoxur in insecticidal formulations, fortified water, vegetables, agricultural wastewater, and agricultural soil samples has been elaborated. The proposed method is based on the hydrolysis of propoxur under basic conditions, followed by instantaneous azo coupling of the resulting 2‐isopropoxyphenol with the anilines 2a–c. This yielded the orange‐red chromophore 3a (λmax=at 470 nm), the pale‐red coupling product 3b (490 nm), or the red derivative 3c (478 nm), which are stable for 46 h, 38 h, and 24 h, respectively, and could be readily analyzed spectrophotometrically.
Novel, Complex Flavonoids from Mallotus philippensis (Kamala Tree)
Authors: Furusawa Miyuki , Ido Yoshimi , Tanaka Toshiyuki , Ito Tetsuro , Nakaya Ken‐ichi , Ibrahim Iliya , Ohyama Masayoshi , Iinuma Munekazu , Shirataka Yoshiaki , Takahashi Yoshikazu 
Published: May 2005

AbstractOne new flavanone, 4′‐hydroxyisorottlerin (2), and two new chalcone derivatives, kamalachalcones C (3) and D (4), were isolated from Mallotus philippensis (kamala tree). The largest compound (4; Mr 1098 g/mol) was shown to possess a unique, fused‐ring system made of two hydroxy‐chalcone units, giving rise to eight fused benzene/pyran units. From the same plant, the following six known compounds were also isolated: kamalachalcone A (5) and B (6), isoallorottlerin (7), isorottlerin (8), 5,7‐dihydroxy‐8‐methyl‐6‐prenylflavanone (9); 6,6‐dimethylpyrano(2″,3″: 7,6)‐5‐hydroxy‐8‐methylflavanone (10), and rottlerin (1). The structures of the new compounds were confirmed by in‐depth spectral analyses, including 2D‐NMR techniques, and the full 13C‐NMR assignments of the known flavanones 1 and 7–10 are published for the first time.
Chromium‐Mediated Dearomatization: Application to the Synthesis of Racemic 15‐Acetoxytubipofuran and Asymmetric Synthesis of Both Enantiomers
Authors: Kündig E. Peter , Laxmisha Mundruppady S. , Cannas Rita , Tchertchian Sylvie , Ronggang Liu 
Published: May 2005

AbstractAn efficient dearomatization process of [Cr(arene)(CO)3] complexes initiated by a nucleophilic acetaldehyde equivalent is detailed. It generates in a one‐pot reaction three CC bonds and two stereogenic centers. This process allowed a rapid assembly of a cis‐decalin ring system incorporating a homoannular diene unit in just two steps starting from aromatic precursors (Scheme 2). The method was applied to the total synthesis of the eudesmane‐type marine furanosesquiterpene (±)‐15‐acetoxytubipofuran (2). Two routes were successfully used to synthesize the γ‐lactone precursor of the furan ring. The key step in the first approach was a Pd‐catalyzed allylic substitution (Scheme 3), while in the second approach, an Eschenmoser–Claisen rearrangement was highly successful (Scheme 4). The Pd‐catalyzed allylic substitution could be directed to give either the (normal) product with overall retention as major diastereoisomer or the unusual product with inversion of configuration (see Table). For the synthesis of the (−)‐enantiomer (R,R)‐2 of 15‐acetoxytubipofuran, an enantioselective dearomatization in the presence of a chiral diether ligand was implemented (Scheme 7), while the (+)‐enantiomer (S,S)‐2 was obtained via a diastereoselective dearomatization of an arene‐bound chiral imine auxiliary (Scheme 8). Chiroptical data suggest that a revision of the previously assigned absolute configuration of the natural product is required.
Diterpenoid Alkaloids from Aconitum tanguticum
Authors: Wang Yu‐Bo , Huang Rong , Zhang Hong‐Bin , Li Liang 
Published: May 2005

AbstractA new 19,21‐secohetisan diterpenoid alkaloid, tangutisine B (1), was isolated from the aerial parts of Aconitum tanguticum (Maxim.) Stapf., together with pacidine, 14‐deacetylajadine. The structure of 1 was determined by an interpretation of 1D‐ and 2D‐NMR together with X‐ray crystallographic data. Bioactivities of the isolates were tested in the P‐388, Bel‐7402, Cox‐2, and caspase‐3 assays.
Evidence for Interchange Ligand‐Exchange Processes on Solvated Beryllium Cations
Authors: Puchta Ralph , van Eikema Hommes Nico , van Eldik Rudi 
Published: May 2005

AbstractThe ligand‐exchange mechanism of solvated Be2+ cations has been studied by means of DFT calculations (RB3LYP/6‐311+G**). Ligand exchange around [BeL4]2+, where L=H2O, NH3, CO2, formaldehyde (H2CO), HCN, N2, and CO, was found to follow an associative interchange (Ia) process in all cases. The size of the activation barrier is almost independent of the type of donor atom, and depends mainly on the hybridization undergone by the donor atom. This, in turn, suggests that steric effects play a major role in solvent‐ and ligand‐exchange reactions in Be2+ systems.
Tris(perfluoroalkyl)silyl Entities as Unexpectedly Potent Tags for the Noncovalent Immobilization of Catalysts by Fluorous–Fluorous Interactions: Application to the Synthesis of Several Perfluoro‐Tagged Ligands
Authors: Andrushko Vasyl , Schwinn Dominik , Tzschucke Carl Christoph , Michalek Florian , Horn Joachim , Mössner Christian , Bannwarth Willi 
Published: May 2005

AbstractUnexpectedly high retention times were obtained in HPLC investigations for compounds equipped with (C8F17CH2CH2)3Si tags on C8F17‐modified silica gel (Fig. 4). Hence, these tags have a high potential for the noncovalent immobilization of catalysts to be applied in organic solvents, allowing for an easy separation and re‐use of the catalyst by filtration and reapplication. The tris(perfluoroalkyl)silyl tag could be incorporated in a straightforward manner into ligands as demonstrated by the synthesis of several prominent classes of ligands (Schemes 4–6).
Facile Syntheses of the Three Major Metabolites of Thioridazine
Authors: Morrow Ryan J. , Millership Jeff S. , Collier Paul S. 
Published: May 2005

AbstractEfficient, mild syntheses of the three major metabolites 2–4 of the important antipsychotic drug thioridazine (1) have been developed. The cardiotoxic metabolite 2 with a ring sulfoxide moiety was prepared in 96% yield by oxidation of 1 with NaIO4 under acidic conditions. Four different procedures were elaborated for the selective side‐chain sulfide oxidation of 1 to mesoridazine (3), giving rise to yields of up to 91%. Finally, sulforidazine (4) was synthesised via oxidation of the sulfoxide 3 in the presence of either KMnO4 or t‐BuOOH under basic conditions. Except for the oxidation with t‐BuOOH, all reactions took place under mild conditions within a few minutes, were nicely reproducible, and afforded medium‐to‐high yields of the desired products, which could be readily purified by column chromatography.
Secoatisane‐ and Isopimarane‐Type Diterpenoids from the Chinese Mangrove Excoecaria agallocha L.
Authors: Wang Ji‐Dong , Li Zhen‐Yu , Guo Yue‐Wei 
Published: May 2005

AbstractPhytochemical investigations of the stems and leaves of the Chinese mangrove Excoecaria agallocha L. yielded one new secoatisane‐type diterpenoid, agallochaol C (1), three new isopimarane‐type diterpenoids, agallochaols D–F (2–4), along with four known diterpenoids 5–8. The structures of new compounds 1–4 were determined on the basis of spectroscopic‐data interpretation and chemical evidence.
Polymer‐Supported Ionic‐Liquid‐Catalyzed Synthesis of 1,2,3,4‐Tetrahydro‐ 2‐oxopyrimidine‐5‐carboxylates via Biginelli Reaction
Authors: Wang Zong‐Ting , Wang Shu‐Chao , Xu Li‐Wen 
Published: May 2005

AbstractThe Biginelli reaction between an aromatic aldehyde, ethyl acetoacetate, and urea – catalyzed by polymer‐supported, re‐usable, room‐temperature ionic liquids (RTIL) such as 1b – was shown to efficiently proceed in glacial AcOH at 100° to afford the corresponding pyrimidine‐5‐carboxylates 3 in yields up to 99% within 2 h (Table 2). The catalyst(s) could be reused at least five times, basically without loss of activity, which makes this transformation not only straight‐forward, but also considerably less expensive compared to methods involving classical RTIL catalysts.
Normal cirulant graphs with noncyclic regular subroups
Authors: Marušič Dragan , Morris Joy 
Published: May 2005

AbstractWe prove that any circulant graph of order n with connection set S such that n and the order of ℤ(S), the subgroup of ℤ that fixes S set‐wise, are relatively prime, is also a Cayley graph on some noncyclic group, and shows that the converse does not hold in general. In the special case of normal circulants whose order is not divisible by 4, we classify all such graphs that are also Cayley graphs of a noncyclic group, and show that the noncyclic group must be metacyclic, generated by two cyclic groups whose orders are relatively prime. We construct an infinite family of normal circulants whose order is divisible by 4 that are also normal Cayley graphs on dihedral and noncyclic abelian groups. © 2005 Wiley Periodicals, Inc. J Graph Theory
An improvement of the crossing number bound
Authors: Montaron Bernard 
Published: May 2005

AbstractThe crossing number cr(G) of a simple graph G with n vertices and m edges is the minimum number of edge crossings over all drawings of G on the ℝ2 plane. The conjecture made by Erdős in 1973 that cr(G) ≥ Cm3/n2 was proved in 1982 by Leighton with C = 1/100 and this constant was gradually improved to reach the best known value C = 1/31.08 obtained recently by Pach, Radoicčić, Tardos, and Tóth [4] for graphs such that m ≥ 103n/16. We improve this result with values for the constant in the range 1/31.08 ≤ C &&lt; 1/15 where C depends on m/n2. For example, C > 1/25 for graphs with m/n2 > 0.291 and n > 22, and C > 1/20 for dense graphs with m/n2 ≥ 0.485. © 2005 Wiley Periodicals, Inc. J Graph Theory
13C‐ and 14C‐labelling of N‐[1‐(4‐chlorophenyl)‐1H‐pyrrol‐2‐yl‐methyleneamino] guanidinium acetate
Authors: Almeida Maria , Johannesson Petra , Boman Arne , Lundstedt Torbjörn 
Published: May 2005

AbstractN‐[1‐(4‐chlorophenyl)‐1H‐pyrrol‐2‐yl‐13C4‐methyleneamino]guanidinium acetate has been synthesized by a four‐step procedure. This involved reduction of the Weinreb amide N,N′‐dimethyl‐N,N′‐dimethyloxybutane‐1,4‐diamide‐1,2,3,4‐13C4 by Dibal‐H to give the corresponding unstable dialdehyde which is reacted in situ with 4‐chloroaniline to form 1‐(4‐chlorophenyl)‐1H‐pyrrole‐13C4. This pyrrole analogue underwent a Vilsmeyer acylation with POCl3/DMF followed by final reaction with aminoguanidine bicarbonate to produce the desired labelled compound with 99% atom 13C. By using DMF [α‐14C] a radio‐labelled analogue was synthesized with a specific activity of 60 mCi/mmol. Copyright © 2005 John Wiley & Sons, Ltd.
Occurrence of heavy metal‐resistance in microflora from serpentine soil of Andaman
Authors: Pal Arundhati , Dutta Suman , Mukherjee P. K. , Paul A. K. 
Published: May 2005

AbstractSerpentine soils collected from Saddle Hills, Chidyatapu and Rutland of Andaman Islands, India were analyzed for physico‐chemical and microbiological characteristics and compared with those from adjacent non‐serpentine localities. The serpentine soils contained high levels of nickel (1740.0–8033.4 mg/kg dry soil), cobalt (93.2–533.4 mg/kg dry soil) and chromium (302.9–4437.0 mg/kg dry soil), in addition to 62–152 g of iron and 37–60 g of magnesium per kg dry soil. Characteristically the serpentine soils showed low microbial density (6.2–11.3 × 106colony forming unit/g soil) and activity (1.7–3.5 µg fluorescein/g dry soil/h) than non‐serpentine outcrops. Serpentine microbial population was dominated by bacteria which represented 5.12 to 9.5 × 106cfu/g of soil, while the fungal population ranged from 0.17 to 3.21 × 106cfu/g of soil. A total of 342 (200 from serpentine and 142 from non‐serpentine soils) isolates were compared for Ni, Co and Cr resistance. Serpentine microflora was in general, highly resistant than non‐serpentine ones and showed a metal‐resistance profile of Cr > Ni > Co. Amongst the serpentine isolates, 8 and 11 bacteria tolerated >12.0 mMNi and >16.0 mMCr respectively, while 6 fungal isolates showed a minimum inhibitory concentration (MIC) value >8.0 mMCo. These 25 serpentine strains also showed co‐resistance to Cu, Zn and Mn but were sensitive to Hg and Cd. The selected bacterial isolates were resistant to ampicillin, penicillin G and polymyxin B, whereas fungal strains showed resistance to amphotericin B, nystatin and fusidic acid. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Influence of culture conditions on laccase production and isozyme patterns in the white‐rot fungus Trametes gallica
Authors: Dong Jia Li , Zhang Yong Wei , Zhang Ren Huai , Huang Wei Zhao , Zhang Yi Zheng 
Published: May 2005

AbstractLaccase production by the white‐rot fungus Trametes gallica was studied, using twelve different media under static or shaking condition. The results indicated that organic nitrogen sources such as tryptone and peptone strongly improved laccase production. The application of an amino acid mixture and a lignin preparation also increased the formation of laccase, which was not observed in the presence of potato extract. Native polyacryl amide gel electrophoresis (PAGE) followed by laccase activity staining using guaiacol as the substrate was performed to analyze the laccase isozyme patterns under the different culture conditions employed. Zymograms revealed a total of twenty different laccase activity bands that appeared in individual patterns, dependent on the respective culture condition applied. This indicates that both the medium composition and the mode of incubation (static or shaking) influenced the laccase isozyme gene expression. This was the first time to report so many laccase isozymes in a fungus. Native PAGE with silver staining showed that laccases were the main protein productions in several media providing a potentially convenient way in purifying laccases from T. gallica. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Fungal endophytes in five medicinal plant species from Kudremukh Range, Western Ghats of India
Authors: Raviraja N. S. 
Published: May 2005

AbstractEighteen species of endophytic fungi were isolated from bark, stem and leaf segments of five medicinal plant species growing within the Kudremukh range in the Western Ghats of India. The dominant endophytic fungal species isolated from these plant species were Curvularia clavata, C. lunata, C. pallescens and Fusarium oxysporum. The highest species richness as well as frequency of colonization of endophytic fungi was found in the leaf segments, rather than the stem and bark segments, of the host plant species. The greatest number of endophytic fungal species were found within Callicarpa tomentosa (11 species), whereas Lobelia nicotinifolia harbored the lowest number of fungal endophytes (5 species). This study provides evidence that fungal endophytes are host and tissue specific. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Tannic acid resistance in ruminal streptococcal isolates
Authors: Goel Gunjan , Puniya Anil Kumar , Singh Kishan 
Published: May 2005

AbstractTannin degrading isolates of Streptococcus spp. from rumen of non‐adaptive cattle, when grown in BHI broth, were able to tolerate tannic acid upto a level of 50 g/l. An increase in lag period from 1.5 to 6 h was observed for the isolates in presence of increased concentration of tannic acid. In addition, the morphology of gram positive diplococci converted to an elongated chain of 40–50 cells with increasing tannic acid from 1 to 4%. Qualitatively, the tannase activity was found to be present in the isolates tested, indicating their potential of being a tannin degrader. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Epoxies Modified by Palmitic Acid: From Hot‐Melt Adhesives to Plasticized Networks
Authors: Hoppe Cristina E. , Galante María J. , Oyanguren Patricia A. , Williams Roberto J. J. 
Published: May 2005

AbstractSummary: Reactions taking place in a homogeneous solution of an epoxy monomer based on the diglycidyl ether of bisphenol A (DGEBA) and palmitic acid (PA), in the presence of benzyldimethylamine (BDMA), were investigated using Fourier‐transformed infrared spectroscopy (FTIR) and size exclusion chromatography (SEC). In the stoichiometric formulations prepared with equal molar ratios of epoxy (E) to carboxyl groups, E/PA = 1, the main reaction was the carboxyl addition to the epoxy giving a β‐hydroxy ester. This reaction was followed by transesterification that occurred to a very small extent. In the formulations prepared with an epoxy excess, E/PA > 1, the transesterification reactions were very significant as well as the homopolymerization of the epoxy excess that took place to an almost complete conversion. Reaction products synthesized in the range of 1 < E/PA < 2 were solids at room temperature due to the crystallization of a fraction of fatty acid chains. Above the melting temperature, reaction products recovered the liquid state. The formulation synthesized with E/PA = 2 exhibited a good behavior as a hot‐melt adhesive of steel sheets with a single lap‐shear strength of 2.5 MPa and an interfacial‐cohesive failure. For E/PA > 3, the gelation took place leading to the networks exhibiting a single glass transition temperature (Tg) without any evidence of crystallization or phase separation. Tg varied from 90 °C for the neat epoxy to 0 °C for the formulation with E/PA = 3.Single lap‐shear strength values of hot‐melt adhesives corresponding to reaction products synthesized with E/PA = 1.6, 1.8, and 2.magnified imageSingle lap‐shear strength values of hot‐melt adhesives corresponding to reaction products synthesized with E/PA = 1.6, 1.8, and 2.
Some design criteria for UWB planar monopole antennas: Application to a slotted rectangular monopole
Authors: Valderas D. , Meléndez J. , Sancho I. 
Published: May 2005

AbstractA method to increase the bandwidth of planar monopoles is presented. Following the provided design criteria, a simple rectangular‐shaped monopole is fit to operate at ultra‐wide‐band (UWB) frequency. The process involves two steps: (i) optimizing the perimeter and feeding dimensions and (ii) conducting a suitable slot. This causes the difference between the upper and lower frequency limits to nearly double. The exhibited bandwidth ratio is 1:3.75. The measured radiation patterns are presented and observed to be stable. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 46: 6–11, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20885
A slotted strip as a key element of the simplest notch and bandstop filters
Authors: Kirilenko Anatoly A. , Mospan Lyudmyla P. 
Published: May 2005

AbstractIn this paper, a new notch and bandstop filters are proposed and investigated. A rejection section, based on a thin slotted H‐plane strip, provides a symmetric frequency response with very low insertion loss out of the stopband. The rejection phenomenon is explained by the simultaneous excitation of two eigenoscillations with low and highQ‐factors. The results of numerical design and measurement data are given for a 3% notch filter and a 2% three‐section bandstop one. Such a notch filter is probably the simplest one due to its easy fabrication and has the potential to be incorporated in a waveguide circuit by placing it between the waveguide flanges. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 46: 20–24, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20889
Large antenna array remoting using radio‐over‐fiber techniques for radio astronomical application
Authors: Montebugnoli S. , Boschi M. , Perini F. , Faccin P. , Brunori G. , Pirazzini E. 
Published: May 2005

AbstractA field‐trial system is presented in this paper to demonstrate that radio‐over‐fiber (RoF) techniques can be successfully applied to the remoting of a large antenna array for radio astronomical applications. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 46: 48–54, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20898
Printed short‐circuited wideband monopole antenna with band‐notched operation
Authors: Wong Kin‐Lu , Chou Liang‐Che , Chang Fa‐Shian 
Published: May 2005

AbstractThis paper presents the band‐notched operation of a printed short‐circuited wideband monopole antenna. The notched or rejected band within a wide operating bandwidth is obtained by embedding an inverted U‐shaped slot close to the shorting point of the antenna, where strong excited surface currents in the antenna are usually present. The notched band is controllable by adjusting the lengths of the inner and outer perimeters of the embedded U‐shaped slot. A constructed prototype of the antenna is demonstrated, and a parametric study of the embedded slot used for band‐notched operation is also presented. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 46: 58–61, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20900