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https://www.readbyqxmd.com/read/29734738/a-microwave-method-for-dielectric-characterization-measurement-of-small-liquids-using-a-metamaterial-based-sensor
#1
Weina Liu, Haoran Sun, Lei Xu
We present a microwave method for the dielectric characterization of small liquids based on a metamaterial-based sensor The proposed sensor consists of a micro-strip line and a double split-ring resonator (SRR). A large electric field is observed on the two splits of the double SRRs at the resonance frequency (1.9 GHz). The dielectric property data of the samples under test (SUTs) were obtained with two measurements. One is with the sensor loaded with the reference liquid (REF) and the other is with the sensor loaded with the SUTs...
May 5, 2018: Sensors
https://www.readbyqxmd.com/read/29726661/-micro-dissection-testicular-sperm-extraction-for-patients-with-non-obstructive-azoospermia-a-report-of-196-cases
#2
Jing Zhang, Gui-Hua Liu, Lu-Gang Zhao, Xiao-Yan Liang, Zhong-Yang Wang
Objective: To investigate the effect of micro-dissection testicular sperm extraction (microTESE) for patients with non-obstructive azoospermia (NOA) and the indications of the strategy. METHODS: This retrospective study included 196 cases of NOA undergoing microTESE in our center from September 2014 to March 2017. We recorded the sperm retrieval rate (SRR) and analyzed its correlation with the patients' age, testis volume, level of blood follicle-stimulating hormone (FSH), and etiological factors...
September 2017: Zhonghua Nan Ke Xue, National Journal of Andrology
https://www.readbyqxmd.com/read/29696996/a-technical-assessment-of-the-porcine-ejaculated-spermatozoa-for-a-sperm-specific-rna-seq-analysis
#3
Marta Gòdia, Fabiana Quoos Mayer, Julieta Nafissi, Anna Castelló, Joan Enric Rodríguez-Gil, Armand Sánchez, Alex Clop
The study of the boar sperm transcriptome by RNA-seq can provide relevant information on sperm quality and fertility and might contribute to animal breeding strategies. However, the analysis of the spermatozoa RNA is challenging as these cells harbor very low amounts of highly fragmented RNA, and the ejaculates also contain other cell types with larger amounts of non-fragmented RNA. Here, we describe a strategy for a successful boar sperm purification, RNA extraction and RNA-seq library preparation. Using these approaches our objectives were: (i) to evaluate the sperm recovery rate (SRR) after boar spermatozoa purification by density centrifugation using the non-porcine-specific commercial reagent BoviPureTM ; (ii) to assess the correlation between SRR and sperm quality characteristics; (iii) to evaluate the relationship between sperm cell RNA load and sperm quality traits and (iv) to compare different library preparation kits for both total RNA-seq (SMARTer Universal Low Input RNA and TruSeq RNA Library Prep kit) and small RNA-seq (NEBNext Small RNA and TailorMix miRNA Sample Prep v2) for high-throughput sequencing...
April 26, 2018: Systems Biology in Reproductive Medicine
https://www.readbyqxmd.com/read/29677636/aunp-rf-sensor-an-innovative-application-of-rf-technology-for-sensing-pathogens-electrically-in-liquids-spel-within-the-food-supply-chain
#4
Leann Lerie Matta, Saranraj Karuppuswami, Premjeet Chahal, Evangelyn C Alocilja
Rapid detection techniques of pathogenic bacteria in the liquid food supply chain are of significant research interest due to their pivotal role in preventing foodborne outbreaks, and in maintaining high standards of public health and safety. Milk and dairy products are of particular interest due to their widespread consumption across the globe. In this paper, a biosensor for detecting pathogenic bacteria in milk using dextrin-capped gold nanoparticles (d-AuNP) as labels decoded at microwave frequencies is presented...
April 11, 2018: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29651739/prognostic-utility-of-splenic-response-ratio-in-dipyridamole-pet-myocardial-perfusion-imaging
#5
Karan Bami, Shrankhala Tewari, Fadi Guirguis, Linda Garrard, Ann Guo, Alomgir Hossain, Terrence D Ruddy, Rob S B Beanlands, Robert A deKemp, Benjamin J W Chow, Girish Dwivedi
BACKGROUND: Cardiac magnetic resonance perfusion studies with adenosine stress have shown that splenic response can identify patients with inadequate pharmacologic stress. We investigate the incremental prognostic impact of splenic response ratio (SRR) in patients with normal Rubidium (Rb)-82 PET myocardial perfusion imaging (MPI). METHODS: Consecutive patients undergoing dipyridamole Rb-82 PET MPI for the evaluation of coronary artery disease were screened. Spleen and liver Rb-82 activity was measured and the SRR was calculated: SRR = (Spleen stress/Liver stress)/(Spleen rest/Liver rest)...
April 12, 2018: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/29642560/near-field-chipless-radio-frequency-identification-rfid-sensing-and-identification-system-with-switching-reading
#6
Ferran Paredes, Cristian Herrojo, Javier Mata-Contreras, Miquel Moras, Alba Núñez, Eloi Ramon, Ferran Martín
A chipless radio-frequency identification (chipless-RFID) and sensing system, where tags are read by proximity (near-field) through a switch, is presented. The tags consist of a set of identical resonant elements (split-ring resonators or SRRs), printed or etched at predefined and equidistant positions, forming a linear chain, each SRR providing a bit of information. The logic state ('1' or '0') associated with each resonator depends on whether it is present or not in the predefined position. The reader is an array of power splitters used to feed a set of SRR-loaded transmission lines (in equal number to the number of resonant elements, or bits, of the tag)...
April 9, 2018: Sensors
https://www.readbyqxmd.com/read/29623650/multi-scale-approach-for-the-evaluation-of-bone-mineralization-in-strontium-ranelate-treated-diabetic-rats
#7
Pedro Álvarez-Lloret, Juan Manuel Fernández, María Silvina Molinuevo, Agustina Berenice Lino, José Luis Ferretti, Ricardo Francisco Capozza, Ana María Cortizo, Antonio Desmond McCarthy
Long-term diabetes mellitus can induce osteopenia and osteoporosis, an increase in the incidence of low-stress fractures, and/or delayed fracture healing. Strontium ranelate (SrR) is a dual-action anti-osteoporotic agent whose use in individuals with diabetic osteopathy has not been adequately evaluated. In this study, we studied the effects of an oral treatment with SrR and/or experimental diabetes on bone composition and biomechanics. Young male Wistar rats (half non-diabetic, half with streptozotocin/nicotinamide-induced diabetes) were either untreated or orally administered 625 mg/kg/day of SrR for 6 weeks...
April 5, 2018: Biological Trace Element Research
https://www.readbyqxmd.com/read/29621074/short-implants-analysis-of-69-implants-loaded-in-mandible-compared-with-longer-implants
#8
Antonio Scarano, Carmen Mortellaro, Matteo Brucoli, Alberta Greco Lucchina, Bartolomeo Assenza, Felice Lorusso
OBJECTIVES: In the last decade, several studies have reported that short implants achieve excellent results with a 2-stage technique. According to the literature, short dental implants have often been used for the replacement of teeth. METHODS AND MATERIALS: A total of 69 short implants (Bone System) were inserted in the posterior mandibular area (41 in males, 28 in females, with a median age of 55 years and an age ranging from 41 to 70 years). RESULTS: Mean loss of bone levels at 1 year was 0...
April 4, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29610069/sparse-representation-based-radiomics-for-the-diagnosis-of-brain-tumors
#9
Guoqing Wu, Yinsheng Chen, Yuanyuan Wang, Jinhua Yu, Xiaofei Lv, Xue Ju, Zhifeng Shi, Liang Chen, Zhongping Chen
Brain tumors are the most common malignant neurologic tumors with the highest mortality and disability rate. Because of the delicate structure of the brain, the clinical use of several commonly used biopsy diagnosis is limited for brain tumors. Radiomics is an emerging technique for noninvasive diagnosis based on quantitative medical image analyses. However, current radiomics techniques are not standardized regarding feature extraction, feature selection, and decision making. In this paper, we propose a sparse representation-based radiomics (SRR) system for the diagnosis of brain tumors...
April 2018: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/29608557/a-high-throughput-functional-screen-of-human-body-mass-index-gwas-loci-using-tissue-specific-rnai-drosophila-melanogaster-crosses
#10
Thomas J Baranski, Aldi T Kraja, Jill L Fink, Mary Feitosa, Petra A Lenzini, Ingrid B Borecki, Ching-Ti Liu, L Adrienne Cupples, Kari E North, Michael A Province
Human GWAS of obesity have been successful in identifying loci associated with adiposity, but for the most part, these are non-coding SNPs whose function, or even whose gene of action, is unknown. To help identify the genes on which these human BMI loci may be operating, we conducted a high throughput screen in Drosophila Melanogaster. Starting with 78 BMI loci from two recently published GWAS meta-analyses, we identified fly orthologs of all nearby genes (± 250KB). We crossed RNAi knockdown lines of each gene with flies containing tissue-specific drivers to knock down (KD) the expression of the genes only in the brain and the fat body...
April 2, 2018: PLoS Genetics
https://www.readbyqxmd.com/read/29584929/correlative-electron-energy-loss-spectroscopy-and-cathodoluminescence-spectroscopy-on-three-dimensional-plasmonic-split-ring-resonators
#11
Isobel C Bicket, Edson P Bellido, Sophie Meuret, Albert Polman, Gianluigi A Botton
We present the surface plasmon resonance modes in three-dimensional (3D) upright split ring resonators (SRR) as studied by correlative cathodoluminescence (CL) spectroscopy in a scanning electron microscope (SEM) and electron energy loss spectroscopy (EELS) in a transmission electron microscope. We discuss the challenges inherent in studying the plasmon modes of a 3D nanostructure and how meeting these challenges benefits from the complementary use of EELS and SEM-CL. With the use of EELS, we detect a strong first order mode in the SRR; with comparison to simulations, we are able to identify this as the well-known magnetic dipole moment of the SRR...
March 1, 2018: Microscopy
https://www.readbyqxmd.com/read/29581195/srr-adhesins-mediate-shear-enhanced-streptococcal-binding-to-platelets
#12
Olga Yakovenko, Jamie Nunez, Barbara Bensing, Hai Yu, Jonathan Mount, Jie Zeng, Jasmine Hawkins, Xi Chen, Paul M Sullam, Wendy Thomas
The binding of bacteria to platelets is thought to be a central event in the pathogenesis of infective endocarditis. The serine-rich repeat (SRR) glycoproteins of viridans group streptococci have been shown to mediate platelet binding in vitro and to contribute to virulence in animal models. However, it is not known whether SRR adhesins can mediate streptococcal binding under the high fluidic shear stress conditions present on the endocardial surface. We found that three streptococcal SRR adhesins (GspB, Hsa, and SrpA) with differing structures and sialoglycan binding specificities nevertheless exhibited similar biomechanical properties...
March 26, 2018: Infection and Immunity
https://www.readbyqxmd.com/read/29552424/negative-event-recall-as-a-vulnerability-for-depression-relationship-between-momentary-stress-reactive-rumination-and-memory-for-daily-life-stress
#13
Samantha L Connolly, Lauren B Alloy
The current research utilized ecological momentary assessment (EMA) methodology to test the hypotheses that: 1) engaging in greater rumination following stress (stress-reactive rumination; SRR) would lead to improved stressor recall, and 2) this improved memory for stress would predict increases in depressive symptoms. One hundred twenty-one participants received smartphone alerts in which they reported on their experience of negative life events (NLEs) as well as SRR and depressed mood after event occurrence...
2018: Clinical Psychological Science
https://www.readbyqxmd.com/read/29550667/biological-minimization-of-excess-sludge-in-a-membrane-bioreactor-effect-of-plant-configuration-on-sludge-production-nutrient-removal-efficiency-and-membrane-fouling-tendency
#14
Taissa Silva de Oliveira, Santo Fabio Corsino, Daniele Di Trapani, Michele Torregrossa, Gaspare Viviani
Excess sludge minimization was studied in a MBR with pre-denitrification scheme. Sludge minimization, nitrogen removal performance and membrane fouling tendency were investigated in two configurations, characterized by a different position of the sludge retention reactor (SRR). In particular, the SRR was placed: i) in the return activated sludge line (Anaerobic Side-Stream Reactor - ASSR configuration) and ii) in the mainstream between the anoxic and aerobic reactor (Anaerobic Main-Stream Reactor - AMSR configuration)...
July 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29550603/deletion-of-serine-racemase-confers-d-serine-dependent-resilience-to-chronic-social-defeat-stress
#15
Chao Dong, Ji-Chun Zhang, Qian Ren, Min Ma, Youge Qu, Kai Zhang, Wei Yao, Tamaki Ishima, Hisashi Mori, Kenji Hashimoto
The N-methyl-D-aspartate receptor (NMDAR) plays a key role in the pathophysiology of depression. Serine racemase (SRR, encoded by Srr) converts L-serine to D-serine, an endogenous co-agonist at the glycine site of the NMDAR. Knock-out (KO) of Srr did not alter behavioral signs of depression compared with wild-type (WT) mice as evaluated by locomotion, tail suspension, forced swimming, and 1% sucrose preference tests. However, chronic social defeat stress (CSDS: 10 days) caused a depression-like phenotype as measured by these same tests in WT mice but not in Srr KO mice, suggesting that decreased D-serine co-agonist activity confers resilience against CSDS...
June 2018: Neurochemistry International
https://www.readbyqxmd.com/read/29528645/regio-and-stereospecific-synthesis-of-oridonin-d-ring-aziridinated-analogues-for-the-treatment-of-triple-negative-breast-cancer-via-mediated-irreversible-covalent-warheads
#16
Ye Ding, Dengfeng Li, Chunyong Ding, Pingyuan Wang, Zhiqing Liu, Eric A Wold, Na Ye, Haiying Chen, Mark A White, Qiang Shen, Jia Zhou
Covalent drug discovery has undergone a resurgence in recent years due to comprehensive optimization of the structure-activity relationship (SAR) and the structure-reactivity relationship (SRR) for covalent drug candidates. The natural product oridonin maintains an impressive pharmacological profile through its covalent enone warhead on the D-ring and has attracted substantial SAR studies to characterize its potential in the development of new molecular entities for the treatment of various human cancers and inflammation...
April 12, 2018: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29476432/cigarette-smoking-and-risk-of-albuminuria-in-patients-with-type-2-diabetes-a-systematic-review-and-meta-analysis-of-observational-studies
#17
Haili Xu, Jinliu Suo, Jing Lian
BACKGROUND: The aim of this study was to assess the effects of smoking on albuminuria risk in adults with type 2 diabetes mellitus (T2DM). METHODS: A literature search was conducted using MEDLINE, EMBASE, and China National Knowledge Infrastructure from the established date to October 2017. Summary relative risks (SRR) and 95% confidence intervals (CI) were computed utilizing a random effect inverse variance method. RESULTS: This meta-analysis included a total of 19 relevant observational studies (four prospective cohort, seven case-control, and eight cross-sectional studies), reporting 105,031 participants and 23,366 albuminuria events...
May 2018: International Urology and Nephrology
https://www.readbyqxmd.com/read/29464946/uptake-of-tio-2-nanoparticles-into-c-elegans-neurons-negatively-affects-axonal-growth-and-worm-locomotion-behavior
#18
Chun-Chih Hu, Gong-Her Wu, Tzu-En Hua, Oliver I Wagner, Ta-Jen Yen
We employ model organism Caenorhabditis elegans to effectively study the toxicology of anatase and rutile phase titanium dioxide (TiO2 ) nanoparticles (NPs). The experimental results show that nematode C. elegans can take up fluorescein isothiocyanate-labeled TiO2 NPs and that both anatase and rutile TiO2 NPs can be detected in the cytoplasm of cultured primary neurons imaged by transmission electron microscopy. After TiO2 NP exposure, these neurons also grow shorter axons, which may be related to the detected impeded worm locomotion behavior...
March 14, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29458778/anti-hypertensive-drugs-and-skin-cancer-risk-a-review-of-the-literature-and-meta-analysis
#19
REVIEW
Sara Gandini, Domenico Palli, Giuseppe Spadola, Benedetta Bendinelli, Emilia Cocorocchio, Ignazio Stanganelli, Lucia Miligi, Giovanna Masala, Saverio Caini
INTRODUCTION: Several anti-hypertensive drugs have photosensitizing properties, however it remains unclear whether long-term users of these drugs are also at increased risk of skin malignancies. We conducted a literature review and meta-analysis on the association between use of anti-hypertensive drugs and the risk of cutaneous melanoma and non-melanoma skin cancer (NMSC). METHODS: We searched PubMed, EMBASE, Google Scholar and the Cochrane Library, and included observational and experimental epidemiological studies published until February 28th, 2017...
February 2018: Critical Reviews in Oncology/hematology
https://www.readbyqxmd.com/read/29453453/a-meta-surface-antenna-array-decoupling-maad-method-for-mutual-coupling-reduction-in-a-mimo-antenna-system
#20
Ziyang Wang, Luyu Zhao, Yuanming Cai, Shufeng Zheng, Yingzeng Yin
In this paper, a method to reduce the inevitable mutual coupling between antennas in an extremely closely spaced two-element MIMO antenna array is proposed. A suspended meta-surface composed periodic square split ring resonators (SRRs) is placed above the antenna array for decoupling. The meta-surface is equivalent to a negative permeability medium, along which wave propagation is rejected. By properly designing the rejection frequency band of the SRR unit, the mutual coupling between the antenna elements in the MIMO antenna system can be significantly reduced...
February 16, 2018: Scientific Reports
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