bluuebunny/crossref_metadata_2025_split huggingface dataset:
Composition of riparian litter input regulates organic matter decomposition: Implications for headwater stream functioning in a managed forest landscape
Authors: Lidman Johan , Jonsson Micael , Burrows Ryan M. , Bundschuh Mirco , Sponseller Ryan A. 
Published: January 2017

AbstractAlthough the importance of stream condition for leaf litter decomposition has been extensively studied, little is known about how processing rates change in response to altered riparian vegetation community composition. We investigated patterns of plant litter input and decomposition across 20 boreal headwater streams that varied in proportions of riparian deciduous and coniferous trees. We measured a suite of in‐stream physical and chemical characteristics, as well as the amount and type of litter inputs from riparian vegetation, and related these to decomposition rates of native (alder, birch, and spruce) and introduced (lodgepole pine) litter species incubated in coarse‐ and fine‐mesh bags. Total litter inputs ranged more than fivefold among sites and increased with the proportion of deciduous vegetation in the riparian zone. In line with differences in initial litter quality, mean decomposition rate was highest for alder, followed by birch, spruce, and lodgepole pine (12, 55, and 68% lower rates, respectively). Further, these rates were greater in coarse‐mesh bags that allow colonization by macroinvertebrates. Variance in decomposition rate among sites for different species was best explained by different sets of environmental conditions, but litter‐input composition (i.e., quality) was overall highly important. On average, native litter decomposed faster in sites with higher‐quality litter input and (with the exception of spruce) higher concentrations of dissolved nutrients and open canopies. By contrast, lodgepole pine decomposed more rapidly in sites receiving lower‐quality litter inputs. Birch litter decomposition rate in coarse‐mesh bags was best predicted by the same environmental variables as in fine‐mesh bags, with additional positive influences of macroinvertebrate species richness. Hence, to facilitate energy turnover in boreal headwaters, forest management with focus on conifer production should aim at increasing the presence of native deciduous trees along streams, as they promote conditions that favor higher decomposition rates of terrestrial plant litter.
Electroanalytical Detection of Cr(VI) and Cr(III) Ions Using a Novel Microbial Sensor
Authors: Prabhakaran Divyasree C. , Riotte Jean , Sivry Yann , Subramanian Sankaran 
Published: January 2017

AbstractA microbial sensor, namely carbon paste electrode (CPE) modified with Citrobacter freundii (Cf–CPE) has been developed for the detection of hexavalent (Cr(VI)) and trivalent (Cr(III)) chromium present in aqueous samples using voltammetry, an electroanalytical technique. The biosensor developed, demonstrated about a twofold higher performance as compared to the bare CPE for the chosen ions. Using cyclic voltammetry and by employing the fabricated Cf–CPE, the lowest limit of detection (LLOD) of 1x10−4 M and 5x10−4 M for Cr(VI) and Cr(III) ions respectively could be achieved. By adopting the Differential Pulse Cathodic Stripping Voltammetric technique, the LLOD could be further improved to 1x10−9 M and 1x10−7 M for Cr(VI) and Cr(III) ions respectively using the biomodified electrodes. The reactions occurring at the electrode surface‐chromium solution interface and the mechanisms of biosorption of chromium species onto the biosensor are discussed. The stability and utility of the developed biosensor for the analysis of Cr(VI) and Cr(III) ions in chromite mine water samples has been evaluated.
Determination of Manganese by Cathodic Stripping Voltammetry on a Microfabricated Platinum Thin–film Electrode
Authors: Kang Wenjing , Rusinek Cory , Bange Adam , Haynes Erin , Heineman William R. , Papautsky Ian 
Published: January 2017

AbstractIn this work, we report on the determination of trace manganese (Mn) using cathodic stripping voltammetry (CSV) using a microfabricated sensor with a Pt thin‐film working electrode. While an essential trace metal for human health, prolonged exposure to Mn tends to gradually impair our neurological system. The potential sources of Mn exposure make it necessary to monitor the concentration in various sample matrices. Previous work by us and others suggested CSV as an effective method for measuring trace Mn. The analytical performance metrics were characterized and optimized, leading to a calculated limit of detection (LOD) of 16.3 nM (0.9 ppb) in pH 5.5, 0.2 M acetate buffer. Further, we successfully validated Mn determination in surface water with ∼90% accuracy and >97% precision as compared with inductively coupled plasma mass spectrometry (ICP‐MS) “gold standard” measurement. Ultimately, with stable, accurate and precise electrochemical performance, this Pt sensor permits rapid monitoring of Mn in environmental samples, and could potentially be used for point‐of‐use measurements if coupled with portable instrumentation.
The Performance of Boron‐Doped Diamond Electrode for the Determination of Ramipril and its Association with Hydrochlorothiazide
Authors: Mattos Gabriel Junquetti , Scremin Jessica , Salamanca‐Neto Carlos Alberto Rossi , Sartori Elen Romão 
Published: January 2017

AbstractThe voltammetric behavior of ramipril (RMP), an angiotensin‐converting enzyme inhibitor, was investigated for the first time in the literature on a boron‐doped diamond electrode (BDDE) using cyclic (CV) and square‐wave voltammetry (SWV). Its behavior was also considered in the presence of a thiazide diuretic, hydrochlorothiazide (HCTZ), for the simultaneous determination. The performance of BDDE and glassy carbon electrode (GCE) was compared, since RMP provides a high oxidation potential. It was observed that the anodic peak potentials for HCTZ and RMP at the BDDE were 1.23 and 1.67 V (vs. Ag/AgCl (3.0 mol L‐1 KCl)) by CV in BR buffer solution (pH 2.0), respectively. The influence of supporting electrolyte, pH and scan rate in the current response of these both drugs was examined to select optimum experimental conditions. By this way, the determination of RMP and its association with HCTZ using SWV and a BDDE was successfully applied in real samples (single and combined dosage forms), with results in close agreement at 95% confidence level with those obtained using high‐performance liquid chromatography.
Cathodized Gold Nanoparticle‐Modified Graphite Pencil Electrode for Non‐Enzymatic Sensitive Voltammetric Detection of Glucose
Authors: Kawde Abdel‐Nasser , Aziz Md. Abdul , El‐Zohri Manal , Baig Nadeem , Odewunmi Nurudeen 
Published: January 2017

AbstractA highly sensitive enzymeless electrochemical glucose sensor has been developed based on the simply prepared cathodized gold nanoparticle‐modified graphite pencil electrode (AuNP‐GPE). Cyclic voltammetry (CV) experiments show that AuNP‐GPE is able to oxidize glucose partially at low potential (around −0.27) whereas the bare GPE cannot oxidize glucose in the entire tested potential windows. Besides, fructose and sucrose cannot be oxidized at potential lower than +0.1 V at AuNP‐GPE. As a result, the glucose oxidation peak at around −0.27 V is suitable enough for selective detection of glucose in the presence of fructose and sucrose. Cathodization of AuNP‐GPE under optimum condition (‐1.0 V for 30 s) in the same glucose solution before voltammetric measurement enhanced glucose oxidation peak current around −0.27 V to achieve an efficient electrochemical sensor for glucose with a detection limit of 12 μM and dynamic range between 0.05 to 5.0 mM with a good linearity (R2= 0.999). Almost no interference effect was observed for sensing of glucose in the presence of ascorbic acid, alanine, phenylalanine, fructose, sucrose, and NaCl.
Confirmation of mutation landscape of NF1‐associated malignant peripheral nerve sheath tumors
Authors: Sohier Pierre , Luscan Armelle , Lloyd Angharad , Ashelford Kevin , Laurendeau Ingrid , Briand‐Suleau Audrey , Vidaud Dominique , Ortonne Nicolas , Pasmant Eric , Upadhyaya Meena 
Published: January 2017

AbstractThe commonest tumors associated with neurofibromatosis type 1 (NF1) are benign peripheral nerve sheath tumors, called neurofibromas. Malignant transformation of neurofibromas into aggressive MPNSTs may occur with a poor patient prognosis. A cooperative role of SUZ12 or EED inactivation, along with NF1, TP53, and CDKN2A loss‐of‐function, has been proposed to drive progression to MPNSTs. An exome sequencing analysis of eight MPNSTs, one plexiform neurofibroma, and seven cutaneous neurofibromas was undertaken. Biallelic inactivation of the NF1 gene was observed in the plexiform neurofibroma and the MPNSTs, underlining that somatic biallelic NF1 inactivation is likely to be the initiating event for plexiform neurofibroma genesis, although it is unlikely to be sufficient for the subsequent MPNST development. The majority (5/8) of MPNSTs in our analyses demonstrated homozygous or heterozygous deletions of CDKN2A, which may represent an early event following NF1 LOH in the malignant transformation of Schwann cells from plexiform neurofibroma to MPNST. Biallelic somatic alterations of SUZ12 was also found in 4/8 MPNSTs. EED biallelic alterations were detected in 2 of the other four MPNSTs, with one tumor having a homozygous EED deletion. A missense mutation in the chromatin regulator KDM2B was also identified in one MPNST. No TP53 point mutations were found in this study, confirming previous data that TP53 mutations may be relatively rare in NF1‐associated MPNSTs. Our study confirms the frequent biallelic inactivation of PRC2 subunits SUZ12 and EED in MPNSTs, and suggests the implication of KDM2B.
Alterations of type II classical cadherin, cadherin‐10 (CDH10), is associated with pancreatic ductal adenocarcinomas
Authors: Jinawath Natini , Shiao Meng‐Shin , Norris Alexis , Murphy Kathleen , Klein Alison P. , Yonescu Raluca , Iacobuzio‐Donahue Christine , Meeker Alan , Jinawath Artit , Yeo Charles J. , Eshleman James R. , Hruban Ralph H. , Brody Jonathan R. , Griffin Constance A. , Harada Shuko 
Published: January 2017

AbstractPancreatic ductal adenocarcinoma (PDAC), either sporadic or familial, has a dismal prognosis and finding candidate genes involved in development of the cancer is crucial for the patient care. First, we identified two patients with germline alterations in or adjacent to CDH10 by chromosome studies and sequencing analyses in 41 familial pancreatic cancer (FPC) cases. One patient had a balanced translocation between chromosome 5 and 20. The breakpoint on chromosome band 5p14.2 was ∼810 Kb upstream of CDH10, while that on chromosome arm 20p was in the pericentromeric region which might result in inactivation of one copy of the gene leading to reduced expression of CDH10. This interpretation was supported by loss of heterozygosity (LOH) seen in this region as determined by short tandem repeat analyses. Another patient had a single nucleotide variant in exon 12 (p.Arg688Gln) of CDH10. This amino acid was conserved among vertebrates and the mutation was predicted to have a pathogenic effect on the protein by several prediction algorithms. Next, we analyzed LOH status in the CDH10 region in sporadic PDAC and at least 24% of tumors had evidence of LOH. Immunohistochemical stains with CDH10 antibody showed a different staining pattern between normal pancreatic ducts and PDAC. Taken together, our data supports the notion that CDH10 is involved in sporadic pancreatic carcinogenesis, and might have a role in rare cases of FPC. Further functional studies are needed to elucidate the tumor suppressive role of CDH10 in pancreatic carcinogenesis.
Dimethyl‐2‐[(acridin‐9‐yl)methylidene]‐malonate as fluorescent probe for histochemical analysis
Authors: Almeida Sinara Mônica Vitalino , Silva Lúcia Patrícia Bezerra Gomes , Lima Luiza Rayanna Amorim , Botelho Sandra Paula Sarinho , Lima Maria do Carmo , Pitta Ivan da Rocha , Beltrão Eduardo Isidoro Carneiro , Carvalho Júnior Luiz Bezerra 
Published: January 2017

AbstractFluorescent compounds have been widely used for biomolecule labeling in cytochemistry and histochemistry analysis. Here, it is described the optical properties of dimethyl 2‐[(acridin‐9‐yl)methylidene]‐malonate (LPSF/IP‐81), an acridine derivative. This compound was conjugated to Concanavalin A (Con A) lectin and applied as sugar probe in lectin histochemistry. Evaluation of luminescent properties showed that LPSF/IP‐81 is photoluminescent with excitation at 360 nm and emission at 428 nm. Con A hemagglutinating activity and LPSF/IP81 photoluminescence were unaltered after conjugation. Circular dichroism of Con A‐LPSF/IP81 conjugate showed the maintenance of the Con A structure. Lectin histochemistry with Con A‐LPSF/IP81 conjugate demonstrated different pattern recognition studying normal, fibroadenoma, and invasive ductal carcinoma of human breast. These findings indicate that LPSF/IP‐81 can be proposed as an alternative probe for histochemical analysis.
Modelling drinking with information
Authors: Giacobbe Andrea , Mulone Giuseppe , Straughan Brian , Wang Wendi 
Published: January 2017

In this article, we propose a mathematical model that describes the dynamics of a population divided into susceptible drinkers, moderate drinkers, and heavy drinkers subject to an external influence. The external influence is modelled using a supplementary dynamical variable that is not a group of individuals but that enters the equations affecting the choices of the population classes.The system we define can be investigated using two simplified systems (one of which is a real subsystem), which model the populations of susceptible and moderate drinkers or susceptible and heavy drinkers independently. The dynamics of these two subsystems can be described exhaustively. The full system is too rich in possible scenarios, but its qualitative behaviour is connected to that of the two simplified systems. We make a complete description only in one particular case by means of numerical simulations. Copyright © 2017 John Wiley & Sons, Ltd.
High linearity, low noise, L‐band cryogenic amplifier for radio astronomical receivers
Authors: Liu Hongfei , Jin Chengjin , Cao Yang , Gan Hengqian 
Published: January 2017

ABSTRACTThis letter presents a novel L‐band cryogenically‐ coolable low noise amplifier applied in radio astronomical receivers. This amplifier can be operated at temperatures of 300K to 4K. Its noise temperature is less than 6K at 20K physics temperature in the frequencies of 1.2∼1.8 GHz. Over 30 dB gain, more than 10 dB input/output return loss and better than ±0.75 dB gain flatness are achieved; Especially, this LNA achieves extremely high large signal performance. Its three order intercepts and 1 dB compressed power referred to output is up to 25.5 dBm and 15 dBm, respectively. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:500–505, 2017
A 1–11 GHz ultra‐wideband LNA using M‐derived inductive peaking circuit in UMC 65 nm CMOS
Authors: Bhatt Darshak , Mukherjee Jayanta , Redouté Jean‐Michel 
Published: January 2017

ABSTRACTA high‐gain, low‐power, and low‐noise amplifier (LNA) is designed in UMC 65 nm radio frequency (RF)‐CMOS technology for operation over the 1 to 11 GHz RF band. This LNA design is based on an m‐derived inductive peaking circuit with a shunt feedback inverter. The m‐derived inductive peaking circuit is placed between two shunt feedback inverters. Further, a split inductor topology is introduced in the circuit. The procedure for the integrating of an m‐derived inductive peaking circuit in LNA is explained in detail. The proposed circuit achieves more than 14 dB of power gain over an ultra‐wideband of 1 to 11 GHz. The measurement of the proposed LNA achieves a minimum of 2.5 dB of noise figure, and more than −8 dBm of third‐order input intercept point, while consuming 11.3 mW of power. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:521–526, 2017
An empirical nonlinear RF model for CMOS fet suitable for modeling the breakdown region
Authors: Hernández‐Díaz I. , Saavedra‐Gómez H.J. , Loo‐Yau J.R. , Reynoso Hernández J.A. , Moreno P. 
Published: January 2017

ABSTRACTThis paper deals with modeling of drain current IDS(VGS,VDS) and intrinsic nonlinear capacitances Cgs(VGS,VDS) and Cgd(VGS,VDS) of the CMOS FET by means of empirical analytical expressions. The proposed models are based on exponential series allowing modeling of the CMOS FET from the linear to the breakdown region. Several High Voltage CMOS (HVMOS) FETs were used to validate the proposed models under pulsed DC, small and large signals. The high correlation between simulated and measured data supports the capability of the proposed empirical model to predict the electrical behavior of the CMOS FET. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:563–567, 2017
Silica‐tube‐based whispering gallery mode DYE lasers based on different pumping schemes
Authors: Yan Donglin , Liu Bo , Zhang Hao , Li Yuetao , Song Binbin , Wu Jixuan 
Published: January 2017

ABSTRACTWe have investigated the properties of silica‐tube‐based whispering gallery mode dye lasers based on two different pumping schemes. A comparison of some fundamental laser properties such as lasing threshold and slope efficiency under different pumping schemes is presented in this article. Moreover, we have also studied lasing emission spectral shift induced by self‐absorption of dye materials as well as change of quality factor under different dye concentrations. The compactness, low lasing threshold and spectral tunability of the proposed opto‐fluidic ring resonator dye laser make it a good candidate for on‐chip light source and related biochemical sensing applications. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:609–614, 2017
Terahertz spectroscopy and chemometrics classification of transgenic corn oil from corn edible oil
Authors: Liu Jianjun 
Published: January 2017

ABSTRACTTerahertz spectroscopy coupled with chemometrics is illustrated to be a useful tool to identify the transgenic corn oil. Terahertz and physicochemical data are gather about transgenic and non‐transgenic corn oils. The two identification models of partial least squares discriminate analyses (PLS‐DA) are established and compared by using terahertz spectroscopy data and physicochemical data respectively. The result shows that PLS‐DA model with physicochemical data can not accurately distinguish between transgenic and non‐transgenic corn oils. Quite the contrary, the PLS‐DA model with terahertz spectroscopy data is better in the validation set; this model accurately identified transgenic corn oil with accuracy of 98.7%. The proposed method has advantages of fast, simple, nondestructive, and easy to operate. The results indicated that Terahertz spectroscopy coupled with chemometrics as a powerful tool to identify transgenic oil. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:654–658, 2017
Textile resonators using a sintered metal conductor for wearable MR‐WPT with high efficiency and wearability
Authors: Kang Seok Hyon , Park Sangwook , Jung Chang Won 
Published: January 2017

ABSTRACTThis article presents an analysis of the performance of the conductive patterns using a sintered metal conductor (SMC) in textile resonators for wearable applications of magnetic resonant wireless power transfer (MR‐WPT). The SMC has advantages in physical and electrical performances. This study compared resonators fabricated with two conductive materials, including a silver paste, as materials for a wearable conductor (MWC). To verify the performance of textile resonators in the MR‐WPT, we configured the proposed system consisting of symmetric transmitter and receiver. In the measurement results, the maximum transfer efficiency of the MR‐WPT with the SMC is 43.19% at 10 mm, which is much higher than the MWC, and it maintains the superb durability and flexibility for wearable applications. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:668–672, 2017
Design of efficient rectifier using IDC and harmonic rejection filter in GSM/CDMA band for RF energy harvesting
Authors: Chandravanshi Sandhya , Akhtar M.J. 
Published: January 2017

ABSTRACTAn improved rectifier based on harmonic rejection filter with inter‐digital capacitor for RF energy harvesting application is proposed. The designed circuit is fabricated on a low cost FR‐4 substrate, and works at GSM/CDMA 900 MHz band. The measured maximum efficiency is 66.31% and maximum obtained power is 15.13 mW at 1.1 KΩ load value. The overall dimension of circuit is 80 × 45 × 1.6 mm3, which can be easily implemented in any device for energizing wireless sensor network. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:681–686, 2017
Design and implementation of a 94/188 GHz dual‐band VCO with gain‐enhanced frequency doubler IN 90 nm CMOS
Authors: Lin Yo‐Sheng , Lin Yu‐Ching , Lan Kai‐Siang 
Published: January 2017

ABSTRACTIn this work, a 94/188 GHz push–push voltage‐controlled oscillator (VCO) using gain‐enhanced frequency doubler is demonstrated in a 90 nm CMOS process. Compared with the traditional push–push architecture, the proposed one can significantly increase the second‐harmonic output signal due to the inductive series‐peaking gain‐enhancement of the full‐wave‐rectifier‐based frequency doubler. In addition, low power dissipation is achieved because the bias current of the frequency doubler is reused by the cross‐coupled transistors of the VCO. The VCO draws 12 mA current from a 1 V power supply, i.e. it only consumes 12 mW. At the fundamental port, the VCO achieves a tuning range of 92.6∼95 GHz and a low phase‐noise of −88.2 dBc/Hz at 1 MHz offset from the center frequency. The corresponding FOM is −177 dBc/Hz. At the push–push port, the VCO achieves a tuning range of 185.2∼190 GHz and a low phase‐noise of −82.5 dBc/Hz at 1 MHz offset from the center frequency. The corresponding FOM is −177.3 dBc/Hz. To the authors’ knowledge, the phase noise and FOM performances of the VCO are one of the best results ever reported for a W‐band or G‐band CMOS VCO. The circuit occupies a small chip area of 0.58 × 0.61 mm2, i.e. 0.35 mm2, excluding the test pads. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:675–681, 2017
CRLH unit cell loaded triple band compact monopole antenna for WLAN/WiMAX applications
Authors: Nandi Sourav , Mohan Akhilesh 
Published: January 2017

ABSTRACTA miniaturized triple band monopole antenna, loaded with complementary right/left handed (CRLH) unit cell, is proposed in this letter. Due to the loading of CRLH unit cell, two extra resonant frequencies are obtained below the conventional rectangular loop monopole resonant frequency of the antenna and thus the electrical size of the antenna is reduced in a great extent. The antenna operates in the range of 2.39–2.6 GHz, 3.38–3.68 GHz, and 5.12–6.51 GHz. Moreover, the antenna offers omnidirectional radiation pattern and moderate gain, which makes the proposed design well suited for practical wireless LAN (WLAN‐2.4/5.2/5.8 GHz) and worldwide interoperability for microwave access (WiMAX‐2.5/3.5/5.5 GHz) applications. The physical size of the antenna is 20 mm × 21 mm × 1.57 mm, which is highly compact compared with the earlier published metamaterial inspired tri‐band antennas. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:686–691, 2017