bluuebunny/crossref_metadata_2025_split huggingface dataset:
Water dynamics of Ser‐His‐Glu‐Cys‐Asn powder and effects of moisture absorption on its chemical properties
Authors: Lin Songyi , Xue Peiyu , Yang Shuailing , Li Xingfang , Dong Xiuping , Chen Feng 
Published: November 2016

AbstractBACKGROUNDThis study has elucidated moisture dynamics in the soybean peptide, Ser‐His‐Glu‐Cys‐Asn (SHECN) powder by using dynamic vapor sorption (DVS) and nuclear magnetic resonance (NMR). We also tried to investigate the effects of moisture absorption on the biological activity and chemical properties of SHECN with some effective methods such as mid‐infrared (MIR) spectroscopy and gas chromatography–mass spectrometry (GC‐MS).RESULTSDVS results showed that the moisture absorption of SHECN could reach a maximum of 33%, and the SHECN powder after synthesis actually existed in a trihydrate state of SHECN.3H2O. Low‐field NMR revealed that three water proportions including strong combined water, binding water and bulk water were involved in SHECN moisture absorption and absored water dominantly existed in the form of combined water. Magnetic resonance imaging (MRI) and MIR spectroscopy results indicated that moisture absorption could change the morphology and structure of SHECN. After moisture absorption at 50% and 75% relative humidity, 19 volatiles were identified by GC‐MS analysis. Additionally, this study showed that a part of reductive groups in SHECN was oxidized and its antioxidant ability declined significantly (P < 0.05) after moisture absorption.CONCLUSIONWater absorbed into SHECN powder can significantly change its microstructure and cause its activity to decrease. We must prevent SHECN from absorbing moisture during storage because the water can accelerate the oxidation of samples and promote microbial reactions. © 2016 Society of Chemical Industry
Angiotensin‐converting enzyme inhibitory and antioxidant peptides from digestion of larvae and pupae of Asian weaver ant, Oecophylla smaragdina, Fabricius
Authors: Pattarayingsakul Werawich , Nilavongse Arjaree , Reamtong Onrapak , Chittavanich Pamorn , Mungsantisuk Idsada , Mathong Yuvadee , Prasitwuttisak Wipoo , Panbangred Watanalai 
Published: November 2016

AbstractBACKGROUNDMixed larvae and pupae of weaver ant (Oecophylla smaragdina) are widely used as an important food ingredient in regions of Thailand. They have high nutritional values and comprise 53% protein and 13% lipid. Peptides derived from food proteins have been shown to possess biological activities.RESULTSPeptides derived from pepsin and trypsin digestion of these weaver ant larvae and pupae were purified based on angiotensin‐converting enzyme (ACE) inhibitory and antioxidant activities, and their amino acid sequences were identified by liquid chromatography–tandem mass spectrometry (LC‐MS/MS). In silico docking of peptides with ACE successfully predicted the inhibitory peptides as confirmed by their chemical synthesis. Two peptides with sequences of FFGT and LSRVP showed IC50 values for ACE inhibition of 19.5 ± 1.7 and 52.7 ± 4.0 µmol L−1, respectively. In addition, one potent antioxidant peptide with a sequence of CTKKHKPNC showed IC50 values of 48.2 ± 2.1 µmol L−1 for DPPH assay and 38.4 ± 0.2 µmol L−1 for ABTS assay, respectively.CONCLUSIONThese results indicate that proteins from larvae and pupae of weaver ants are potential sources of peptides with anti‐ACE and antioxidation bioactivities. © 2016 Society of Chemical Industry
Trends and the utilization of transoral robotic surgery with neck dissection in New York State
Authors: Frenkel Catherine H. , Yang Jie , Zhang Mengru , Regenbogen Elliot , Telem Dana A. , Samara Ghassan J. 
Published: November 2016

ObjectivesThe timing of neck dissection (ND) in relation to transoral robotic surgery (TORS) is controversial. This study identifies local practice patterns and economic and social access disparities during adoption of TORS.Study DesignWe analyzed utilization patterns of TORS and ND using the New York Statewide Planning and Research Cooperative System all‐payer administrative database. Statewide head and neck cancer incidence from the Centers for Disease Control and Prevention (Bethesda, MD) was used to control for overall cancer incidence.MethodsPatient demographic, insurer, and institutional information of patients aged ≥ 18 (n = 225) years from 2008 to 2012 were evaluated. Temporal trends were analyzed with Poisson regression models for counts.ResultsTransoral robotic surgery was used in 386 procedures, and 58.3% involved ND (n = 225). Concurrent ND was most frequent (n = 173), followed by staged TORS then ND (n = 44) and staged ND preceding TORS (n = 8). Caucasians were more likely than Blacks/Hispanics to undergo TORS (P = 0.03). Medicare (26.2%) and Medicaid (2.7%) payers comprised a minority of patients compared to those commercially insured (70.2%). Only 20% of patients received care outside a major urban center, and these patients were more likely to undergo staged procedures, P = 0.02. Staged procedures resulted in higher mean hospital charges (P = 0.02).ConclusionConcurrent TORS + ND, the most common practice in New York, is more cost‐effective. Patients without commercial insurance, patients in racial minorities, or patients residing outside major urban centers may be targeted to improve care access disparities with respect to minimally invasive TORS technology.Level of Evidence2c. Laryngoscope, 127:1571–1576, 2017
3D analysis of the movements of the laryngeal cartilages during singing
Authors: Unteregger Fabian , Honegger Flurin , Potthast Silke , Zwicky Salome , Schiwowa Julia , Storck Claudio 
Published: November 2016

ObjectiveThe vocal range of untrained singers rarely exceeds one and a half octaves, but professional singers have a range of at least two and a half octaves. The aim of this study was to better understand the muscle and cartilage movements responsible for the control of vocal pitch in singing.Study DesignProspective study.MethodsWe recruited 49 female professional singers (25 sopranos and 24 altos) and analyzed laryngeal three‐dimensional images derived from high‐resolution computed tomography scans obtained at the mean speaking fundamental frequency (F0) and at one (F1) and two octaves (F2) above this pitch.ResultsFrom F0 to F1, the only observable movement was a backward cricoid tilting caused by the cricothyroid muscles (CTMs), leading to vocal fold stretching. Above F1, a medial rotation and inward rocking of the arytenoid cartilages was observed, caused by the lateral cricothyroid muscles (LCAMs) and leading to inferior displacement of the vocal process of the arytenoid cartilage, and thus to further vocal fold stretching.ConclusionTrained singers achieve the first octave of pitch elevation by simple cricothyroid approximation. Further pitch elevation necessitates a complex movement of the arytenoids, first by CTM contraction and second by LCAM contraction.Level of Evidence4. Laryngoscope, 127:1639–1643, 2017
Miniaturization of dual band implantable antennas
Authors: Hashemi Soheil , Rashed‐Mohassel Jalil 
Published: November 2016

ABSTRACTAs in medical applications dimensions reduction of implantable devices are of interest, periodic structures were used in substrate of the antenna to reduce the size of dual band miniaturized microstrip antennas even more. Designed substrate reduce the size to about 40%. The characteristics of miniaturized antenna with and without the periodic structure is compared and presented. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:36–40, 2017
Microwave reflectivity analysis of bone mineral density using ultra wide band antenna
Authors: Augustine Robin , Kurup Dhanesh G. , Redzwan Syaiful , Mathur Parul , Raman Sujith , Lee Doojin , Kim Kangwook 
Published: November 2016

ABSTRACTIn this paper, an approach to analyze the bone mineral density (BMD) based on microwave reflectivity is presented The proposed method enables us to overcome the health risks associated with diagnostic techniques such as X‐rays for repeated study of the rate of mineralization in the case of fractures or de‐mineralization in the case of osteoporosis. The proposed method is used to demonstrate the application of microwaves for continuous observation of skull healing process during post‐cranial surgery period. The proposed technique can be a potential clinical model in future for extracting target characteristics such as bone deposition thickness and other cranial defects. Based on the conclusions of wideband measured data and signal processing techniques, we propose to design the Transceiver using ultra‐wideband (UWB) pulsed technology. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:21–26, 2017
Wideband highly linear LNA using modified cascode for simultaneous input and noise matching technique
Authors: Park Seung Pyo , Lee Moon‐Que , Lee Han Lim 
Published: November 2016

ABSTRACTIn this letter, a highly linear low‐noise amplifier (LNA) MMIC configured by a modified cascode structure with the operation band from 1.8 GHz to 2.8 GHz is proposed. The modified cascode structure adopts inductive degeneration and an additional transistor used for linearity enhancement and simultaneous input and noise matching. Also, the resistive feedback at the input and inductive peaking at the output are applied to ensure the stability over the wideband operation. The proposed LNA MMIC was implemented by 0.5μm GaAs pHEMT process and showed the measured input third‐order intercept point (IIP3) of 15.5 ± 1.3 dBm, gain of 16.3 ± 2.2 dB, output P1‐dB of 16.7 ± 0.3 dBm and noise figure (NF) of 1 ± 0.2 dB from 1.8 GHz to 2.8 GHz . © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:15–17, 2017
Wide stopband single‐/dual‐bandpass filters using rotational symmetric composite right/left‐handed resonators
Authors: Guo Zhi‐Gui , Yang Guo‐Min 
Published: November 2016

ABSTRACTBoth single‐/dual‐bandpass wide stopband filters with rotational symmetry using composite right/left‐handed resonators are proposed in this study. Designs of this type obtain a single passband at 2.40 GHz as well as dual passbands at 2.40 and 5.20 GHz, and achieve a wide stopband with no additional structures, which are implemented and demonstrated with full‐wave simulations and measurements. Standing wave coupling models are presented to analyze the characteristics of a wide stopband effectively. The proposed single‐bandpass filter (BPF) with rotational symmetry achieves a preferable wide stopband, in which |S21| is mainly <−20 dB below 19.00 GHz; the proposed dual‐BPF also obtains a wide stopband, in which |S21| < −20 dB below 16.90 GHz. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:49–53, 2017
Wideband and high‐gain EBG resonator antenna based on dual layer PRS
Authors: Chaabane Abdelhalim , Djahli Farid , Attia Hussein , Mohamed Abdelghani Lamine , Ahmed Denidni Tayeb 
Published: November 2016

ABSTRACTA wideband and high‐gain electromagnetic band‐gap resonator antenna for X‐band operation is presented in this paper. A dual‐layer partially reflective surface with a wide frequency band from 8.3 to 11 GHz is proposed to enhance the 3‐dB gain bandwidth of a simple planar antenna. The measured results indicate that the proposed antenna possesses a relative 3‐dB gain bandwidth of about 33.33%, from 7.95 to 11.13 GHz, with a maximum gain of 13.57 dBi. Moreover, the measured impedance bandwidth is about 35.53%, from 7.8 to 11.17 GHz, which fairly covers the 3‐dB gain bandwidth. Hence, the proposed structure surpasses conventional techniques for widening the 3‐dB gain bandwidth. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:98–101, 2017
Quasi‐self‐complementary planar broadband series‐fed array antenna for C‐band applications
Authors: Jalali M. , Naser‐Moghadasi M. , Sadeghzadeh R. A. 
Published: November 2016

ABSTRACTA new design of broadband semi bow‐tie quasi self‐complementary (QSC) CPW series‐fed array antenna for C‐band application is presented and discussed. To realize the presented array element, miniature quasi‐self‐complementary antenna element with a coplanar CPW‐like matching technique is utilized. The proposed element provides a wide impedance bandwidth from 3.95 to 11.25 GHZ for S11<−10 dB. The QSC array antenna's operation is additionally enhanced with assembling of four elements that is designed, using symmetric CPW‐fed with matching method. The measured results illustrate impedance bandwidth from 4.25 to 9.9 GHz for VSWR < 2. The feed‐line is tapered at input section between series‐fed network and antenna because of optimum input impedance matching that leads to improve impedance bandwidth. The measured results of the proposed array also exhibit relatively good radiating pattern and gain values. The design process and the experimental results are discussed in details. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:95–98, 2017
K‐band frequency doubler with low power consumption and compact size in 65 NM CMOS
Authors: Oh Hyun‐Myung , Kim Jae‐Sun , Kim Choul‐Young 
Published: November 2016

ABSTRACTIn this article, a K‐band frequency doubler with low power consumption and compact size using balanced topology is demonstrated. The circuit is fabricated using 65 nm CMOS technology and designed to operate from 23.2 to 26 GHz. The transformer based on the balun and the inductor is designed. Using a balun and inductor based on transformer, the circuit size is reduced and these achieve good balanced performance and input matching. The frequency doubler occupies and area of 0.6 × 0.29
and consumes a current of 5 mA from a 1 V supply. The fabricated frequency doubler exhibits a conversion gain of −8.4 dB at the input frequency of 12 GHz and an input power of 0 dBm. The suppression of the fundamental signal is 31.5 dB at input frequency of 12 GHz. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:93–95, 2017
Connector impedance and frequency modes in aerospace wiring systems
Authors: Lundquist Eric J. , Furse Cynthia 
Published: November 2016

ABSTRACTThis article represents an investigation of connector effects on signal integrity and propagation in aerospace wiring systems–including quantitative data of potential changes in characteristic impedance. It is determined that changes in wire bundling, connector plugmap configurations, shell damage, and other factors impact signal propagation. Wire bundling arrange‐ ment can cause changes greater than ± 60 Ω on a 152 Ω linefurther causing reflection and transmission variation throughout the system. Changing connector configurations were found to cause initial signal reflections from 4 to 76% and total reflection of 0.05‐0.14%, where unshielded wires were found to have greater variation and reflection than shielded wires. The effects of frequency and connector length were also analyzed in order to minimize total internal reflection at connector interfaces. Shell damage can cause reflection up to 0.01, or 1%. Measurements of aerospace connector systems produced reflections <1.5%. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:89–93, 2017
An electrically frequency tunable absorber with no absorption frequency limit
Authors: Jo Eon‐Seok , Cho Soo‐Bean , Kim Dongho 
Published: November 2016

ABSTRACTWe propose an electrically frequency tunable absorber (EFTA) with varactor diodes, which can provide good absorption properties even in much higher frequency bands than conventional EFTAs. In general, conventional EFTAs cannot guarantee high absorption rate beyond a certain frequency limited by high capacitance of commercial varactor diodes. In this letter, however, we suggest a simple but fairly effective way to overcome the high frequency limit by intentionally inserting parasitic capacitance introduced from multiple slits. The parasitic capacitance connected to the varactor diodes in series can decrease overall capacitance to an optimum value. Consequently, we not only can maintain good absorption rate in a very high frequency region, but also freely select a target absorption frequency band by modifying the number of slits. Experiments for normal and oblique incidence have been carried out to validate the proposed method. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:145–148, 2017
A C‐shaped dielectric resonator antenna with frequency reconfigurable for ISM and LTE band applications
Authors: Danesh S. , Kamarudin M. R. , Rahman T. A. , Abedian M. , Jamaluddin M. H. , Khalily M. 
Published: November 2016

ABSTRACTA frequency tunable dielectric resonator antenna (DRA) is studied and presented for ISM and LTE band applications. Here, the frequency operation of the proposed DRA is switched from dual band to narrowband mode by using the PIN diode switches. The switches are employed by RF PIN diodes and placed on the feed line network to excite the dielectric resonator (DR). The proposed reconfigurable DRA has a compact size with a thickness of 3 mm and the overall size of 30 × 37 mm2 that is proper for mobile devices. The measured and simulated results indicate that the proposed DRA provides a single and dual band modes which covers the ISM applications and 2.6 GHz LTE system, respectively. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:134–138, 2017
An asymmetrical dual band bandpass filter
Authors: Malherbe J.A.G. 
Published: November 2016

ABSTRACTA dual band bandpass filter consisting of a cascade of unit elements and shunt connected stepped open and stepped short circuited stubs, is described. The dual passbands can have unequal, asymmetrical width; the stop‐bandwidth between the desired bands and the harmonic upper bands is substantially increased. A prototype filter that finds application in communication systems is developed. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:163–168, 2017
An accurate electromagnetic analysis method for transmission line structures
Authors: Yang Chunxia , Xu Chaonan , Tong Meisong 
Published: November 2016

ABSTRACTElectromagnetic analysis for transmission line structures plays an important role in the design of high‐speed digital integrated circuits. Because different transmission line parameters have different influence on the integrity of the integrated circuit signal. In this article, method of moment combined with the Rao–Wilton–Glisson basis function and the dual basis function is established to solve the integral equations. Transforming the integral equations into matrix equations and achieve the analysis of the input impedance of transmission line structures. Numerical results have been demonstrated with two examples. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:219–223, 2017
UWB flexible filter with low loss and excellent stopband performance
Authors: Zhao Mengjuan , Zhang Yong , Liu Shuang , Jia Yonghao 
Published: November 2016

ABSTRACTThe compact UWB flexible filter with low loss and excellent stop band suppression on ultrathin liquid crystal polymer substrate is presented firstly. A uniform microstrip line connected with five pairs of stubs is used. The flexible filter with the pass band of 4.1–10.6 GHz. The measured minimum insertion loss is 0.76 dB at 5.4 GHz and the return loss is better than 11.3 dB. While the frequency is higher than 12.1 GHz, excellent high resistance band suppression is obtained. The bending behavior of the UWB flexible filter is analyzed. In case of R = 17.5 mm, the insertion loss is only improved by 0.004 dB and the return loss is optimized by 0.45dB. Good agreement is obtained between the flat and the bending. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:194–197, 2017
Comparative analysis of three human adipocyte size measurement methods and their relevance for cardiometabolic risk
Authors: Laforest Sofia , Michaud Andréanne , Paris Gaétan , Pelletier Mélissa , Vidal Hubert , Géloën Alain , Tchernof André 
Published: November 2016

ObjectiveTo determine whether adipocyte diameters from three measurement methods are similarly associated with adiposity measurements and cardiometabolic variables.MethodsSurgical samples of omental and abdominal subcutaneous adipose tissue were obtained in a sample of 60 women (age 35–59 years; body mass index 20.3–41.1 kg/m2). Median adipocyte diameter of the main cell population was determined by collagenase digestion, osmium tetroxide fixation, and histological analysis. Adiposity and cardiometabolic risk factors were assessed.ResultsAdipocyte diameter was consistently smaller with formalin fixation than with collagenase digestion, whereas osmium‐fixed cells were larger (P < 0.0001, for all). Median adipocyte diameters derived from all methods were intercorrelated (r = 0.46–0.83, P < 0.001 for all). Positive associations were found between adipocyte diameters from all techniques and regional or total adiposity measurements (P < 0.01 for all). Omental adipocyte diameter was positively associated with fasting glucose, insulin, and homeostatic model assessment of insulin resistance (r = 0.30–0.52, P < 0.05 for all), with osmium‐fixed cell size as a stronger correlate. Osmium‐fixed cell diameter was also a better correlate of plasma adiponectin and leptin.ConclusionsAlthough measurement techniques generated systematic differences in adipocyte size, associations with adiposity were only slightly affected by the technique. Osmium fixation generated stronger associations with cardiometabolic risk factors than collagenase digestion and histological analysis.
A genetic link between prepregnancy body mass index, postpartum weight retention, and offspring weight in early childhood
Authors: Li Aihua , Teo Koon K. , Morrison Katherine M. , McDonald Sarah D. , Atkinson Stephanie A. , Anand Sonia S. , Meyre David 
Published: November 2016

ObjectiveThe effects of maternal prepregnancy body mass index (BMI) and gestational weight gain (GWG) on maternal and offspring obesity traits, as well as the maternal and offspring genetic contribution to GWG and postpartum weight retention, were examined.MethodsBlood samples from mothers (n = 608) and offspring (n = 541) were genotyped for 83 BMI‐associated SNPs and 47 waist‐to‐hip ratio (WHR)‐associated SNPs. Linear regression and mixed‐effects regression models were performed to examine clinical epidemiological and genetic associations with unweighted and weighted BMI and WHR genetic risk scores (GRS).ResultsPrepregnancy BMI was positively associated with offspring weight and BMI Z‐score from birth to 5 years. GWG was positively associated with maternal postpartum weight retention at 1 and 5 years and with offspring weight Z‐score from birth to 5 years old. The maternal unweighted BMI GRS was associated with prepregnancy BMI, postpartum weight retention at 5 years, and offspring weight Z‐score from birth to 5 years old, but not associated with GWG. Both maternal and offspring unweighted WHR GRSs were negatively associated with GWG.ConclusionsMaternal BMI‐associated SNPs may contribute to the genetic link between prepregnancy BMI variation, long‐term postpartum weight retention, and offspring birth weight and longitudinal weight. Maternal and offspring WHR‐associated SNPs may contribute to GWG variation.
Atypical teratoid/rhabdoid tumor arising in a malignant glioma
Authors: Bozzai Barbara , Hasselblatt Martin , Turányi Eszter , Frühwald Michael C. , Siebert Reiner , Bens Susanne , Schneppenheim Reinhard , Kool Marcel , Stelczer Gábor , Hortobágyi Tibor , Hauser Peter 
Published: November 2016

AbstractAtypical teratoid/rhabdoid tumor (AT/RT), a highly malignant brain tumor in young children, usually arises de novo and has only rarely been described as a secondary malignancy. Here, we present a case of a child with glioblastoma, who was treated postoperatively by a combination of temozolomide, irradiation, and bevacizumab. AT/RT was diagnosed as a secondary tumor, 2.5 years following primary diagnosis. The child died 13 months after the diagnosis of AT/RT. This case demonstrates that malignant gliomas may give rise to AT/RT. It also emphasizes the diagnostic value of a repeated tumor biopsy in the recurrence setting.