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https://www.readbyqxmd.com/read/28636815/accurate-characterization-of-the-pore-volume-in-microporous-crystalline-materials
#1
Daniele Ongari, Peter G Boyd, Senja Barthel, Matthew Witman, Maciej Haranczyk, Berend Smit
Pore volume is one of the main properties for the characterization of microporous crystals. It is experimentally measurable and it can also be obtained from the refined unit cell by a number of computational techniques. In this work we assess the accuracy and the discrepancies between the different computational methods which are commonly used for this purpose, i.e, geometric, helium and probe center pore volume, by studying a database of more than 5000 frameworks. We developed a new technique to fully characterize the internal void of a microporous material and to compute the probe accessible and occupiable pore volume...
June 21, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28636318/inverse-photonic-glasses-by-packing-bi-disperse-hollow-microspheres-with-uniform-cores
#2
Seung-Hyun Kim, Sofia Magkiriadou, Do Kyung Rhee, Doo Sung Lee, Pil J Yoo, Vinothan N Manoharan, Gi-Ra Yi
A major fabrication challenge is producing disordered photonic materials with angle-independent structural red color. Theoretical work has shown that such color can be produced by fabricating inverse photonic glasses with monodisperse, non-touching voids in a silica matrix. Here we demonstrate a route toward such materials and show that they have angle-independent red color. We first synthesize monodisperse hollow silica particles with precisely controlled shell thickness, then make glassy colloidal structures by mixing two types of hollow particles with the same core size and different shell thicknesses...
June 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28634610/efficiently-mapping-structure-property-relationships-of-gas-adsorption-in-porous-materials-application-to-xe-adsorption
#3
A R Kaija, C E Wilmer
Designing better porous materials for gas storage or separations applications frequently leverages known structure-property relationships. Reliable structure-property relationships, however, only reveal themselves when adsorption data on many porous materials are aggregated and compared. Gathering enough data experimentally is prohibitively time consuming, and even approaches based on large-scale computer simulations face challenges. Brute force computational screening approaches that do not efficiently sample the space of porous materials may be ineffective when the number of possible materials is too large...
June 21, 2017: Faraday Discussions
https://www.readbyqxmd.com/read/28634322/helium-irradiation-and-implantation-effects-on-the-structure-of-amorphous-silicon-oxycarbide
#4
Qing Su, Shinsuke Inoue, Manabu Ishimaru, Jonathan Gigax, Tianyao Wang, Hepeng Ding, Michael J Demkowicz, Lin Shao, Michael Nastasi
Despite recent interest in amorphous ceramics for a variety of nuclear applications, many details of their structure before and after irradiation/implantation remain unknown. Here we investigated the short-range order of amorphous silicon oxycarbide (SiOC) alloys by using the atomic pair-distribution function (PDF) obtained from electron diffraction. The PDF results show that the structure of SiOC alloys are nearly unchanged after both irradiation up to 30 dpa and He implantation up to 113 at%. TEM characterization shows no sign of crystallization, He bubble or void formation, or segregation in all irradiated samples...
June 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28634090/evaluation-of-the-effect-of-3-month-bladder-basic-advice-in-children-with-monosymptomatic-nocturnal-enuresis
#5
Marcin Tkaczyk, Michał Maternik, Anna Krakowska, Agnieszka Wosiak, Monika Miklaszewska, Katarzyna Zachwieja, Dariusz Runowski, Anna Jander, Dariusz Ratajczak, Agata Korzeniecka-Kozyrska, Izabella Mader-Wołyńska, Katarzyna Kiliś-Pstrusińska
INTRODUCTION: Advice (BBA) into the standards of patients' care in both monosymptomatic and non-monosymptomatic nocturnal enuresis. Although the idea of this recommendation was clear and reflects clinical experience, duration and efficacy have not been definitely established. Recent data have demonstrated the lack of efficacy of BBA and a fierce discussion has ensued. The present study was aimed to assess the efficacy of BBA in a group of previously untreated children with primary monosymptomatic nocturnal enuresis (MNE)...
June 1, 2017: Journal of Pediatric Urology
https://www.readbyqxmd.com/read/28633991/the-path-to-timelessness-insight-assignment-conditions-and-strong-anticipation
#6
REVIEW
Susie Vrobel
This paper focusses on the notions of time and timelessness in Eastern and Western thought traditions. The Introduction addresses the Eastern differentiation between the mind, which does not operate in a successive manner and is therefore not caught in time, and the time-laden successively operating mind and brain. I also describe how Jiddu Krishnamurti reconciles the two through insight, an event which restructures the brain and culminates in an eternal Now. In the following sections, I draw analogies to Western notions of timelessness and insight...
June 17, 2017: Progress in Biophysics and Molecular Biology
https://www.readbyqxmd.com/read/28633526/reduced-graphene-oxide-poly-acrylic-acid-aerogels-as-a-three-dimensional-replacement-for-metal-foil-current-collectors-in-lithium-ion-batteries
#7
Han Xiao, Joshua P Pender, Mackenzie Meece-Rayle, J Pedro de Souza, Kyle C Klavetter, Heonjoo Ha, Jie Lin, Adam Heller, Christopher J Ellison, Charles Buddie Mullins
We report the synthesis and properties of a low-density (~5 mg/cm3) and highly-porous (99.6% void space) three-dimensional reduced graphene oxide (rGO)/poly(acrylic acid) (PAA) nanocomposite aerogel as the scaffold for cathode materials in lithium-ion batteries (LIBs). The rGO-PAA is both simple and starts from readily-available graphite and PAA thereby providing a scalable fabrication procedure. The scaffold can support as much as a 75 mg/cm2 loading of LiFePO4 (LFP) in a ~ 430 µm thick layer, and the porosity of the aerogel is tunable by compression; the flexible aerogel can be compressed 30-fold (i...
June 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28633459/electron-microscopy-of-voids-in-si-formed-by-permeable-pulse-laser-irradiation
#8
Hiroyuki Iwata, Daisuke Kawaguchi, Hiroyasu Saka
Voids formed in Si by permeable laser irradiation were investigated by comprehensive electron microscopy. Two types of voids were identified: Type (1): This type was formed mostly closer to the entrance surface of a laser, and a considerable volume of a non-diamond Si (DS) phase was formed in the surrounding matrix. Type (2): This type was formed at the focus of an incident laser, and none of dislocations, cracks and non-DS phase was observed in the surrounding matrix. Type (1) voids are considered to be formed to accommodate volume change resulting from transformation from DS to the non-DS...
June 17, 2017: Microscopy
https://www.readbyqxmd.com/read/28633280/motifhyades-expectation-maximization-for-de-novo-dna-motif-pair-discovery-on-paired-sequences
#9
Ka-Chun Wong
Motivation: In higher eukaryotes, protein-DNA binding interactions are the central activities in gene regulation. In particular, DNA motifs such as transcription factor binding sites are the key components in gene transcription. Harnessing the recently available chromatin interaction data, computational methods are desired for identifying the coupling DNA motif pairs enriched on long-range chromatin-interacting sequence pairs (e.g. promoter-enhancer pairs) systematically. Results: To fill the void, a novel probabilistic model (namely, MotifHyades) is proposed and developed for de novo DNA motif pair discovery on paired sequences...
June 13, 2017: Bioinformatics
https://www.readbyqxmd.com/read/28631919/-rehabilitation-of-patients-with-complicated-forms-of-urethral-obliterations
#10
M B Pryanichnikova, O V Zhurkina
The article describes open surgical modalities for managing patients with severe obliterations of the anterior urethra. The mean age of patients was 70 years. The causes of urethral strictures and obliteration included prostatic adenomectomy, scrotal abscess with pelvic bone osteomyelitis, accidental removal of the bulbar and penile urethra during herniotomy and a prolonged use of an indwelling urethral catheter. Two patients underwent perineostomy (median and trapezoidal). In the third patient, scrotal skin was used to form "scrotal hypospadias" (a modified Johansons operation) and the fourth patient underwent Mikhalovskiis operation...
June 2017: Urologii︠a︡
https://www.readbyqxmd.com/read/28631916/-intravesical-prostatic-protrusion-in-diagnosing-infravesical-obstruction-in-men-with-benign-prostatic-hyperplasia
#11
G G Krivoborodov, N S Efremov, A D Bolotov
Infravesical obstruction (IVO) is an important characteristic of the functional state of male lower urinary tract. It is believed that IVO confirmed by pressure-flow study findings warrants switching from a medical to surgical management of lower urinary tract symptoms (LUTS). Intravesical prostatic protrusion (IPP) is a new indicator for detecting IVO secondary to benign prostatic hyperplasia (BPH). This indicator has several advantages over other non-invasive methods for evaluating IVO. The initial findings on the relationship between IPP and IVO suggest the feasibility of its clinical use as a screening tool in men with obstructive voiding symptoms...
June 2017: Urologii︠a︡
https://www.readbyqxmd.com/read/28631835/suprameatal-urethrolysis-with-martius-flap-for-refractory-bladder-outflow-obstruction-following-stress-incontinence-surgery-in-females
#12
Janine L Oliver, Shlomo Raz
AIMS: To present our technique of suprameatal urethrolysis with Martius flap (SMUM) and outcomes of this procedure for refractory female bladder outflow obstruction (BOO). METHODS: A retrospective chart review was performed to identify female patients who underwent SMUM between January 2010 and August 2016 after failed transvaginal urethrolysis (TVU) for BOO due to prior stress urinary incontinence (SUI) surgery. The primary outcome measure was surgical success defined as patient ability to void volitionally without need for catheterization or additional surgery for BOO...
June 20, 2017: Neurourology and Urodynamics
https://www.readbyqxmd.com/read/28631041/an-adolescent-boy-progressing-insidiously-to-end-stage-renal-disease-answers
#13
Aysun Çaltık Yılmaz, Bahar Buyukkaragoz, Selcuk Kivilcim, Aslı Celebi Tayfur, Sacit Gunbey
Hinman syndrome was a non-neurogenic neurogenic bladder and the most severe form of dysfunctional voiding disorder. The bladder-sphincter discoordination causes damage to the bladder and upper urinary tract if it is not diagnosed early and treated adequately. This case emphasizes the following important message: nighttime wetting is not a benign condition in every child. Parental awareness should be raised about voiding disorders, as it may be possible to prevent important renal diseases such as Hinman syndrome...
June 19, 2017: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/28630778/female-urethral-diverticulum-carcinoma-a-case-report-and-literature-review
#14
Ryo Kasahara, Tadashi Tabei, Yukio Tsuura, Kazuki Kobayashi
A 48-year-old woman with a history of voiding difficulty visited our hospital. Magnetic resonance imaging revealed a periurethral tumor, which was pathologically diagnosed as an adenocarcinoma via transperineal needle biopsy. Radical cystectomy and urethrectomy were performed, and the urinary tract was reconstructed using an ileal conduit. Pathological examination of a resected specimen confirmed adenocarcinoma of the urethral diverticulum. The patient received adjuvant gemcitabine and cisplatin chemotherapy...
2017: Case Reports in Urology
https://www.readbyqxmd.com/read/28630762/articular-impaction-injuries-in-the-lower-limb
#15
Ippokratis Pountos, Peter V Giannoudis
The effective management of articular impacted fractures requires the successful elevation of the osteochondral fragment to eliminate joint incongruency and the stable fixation of the fragments providing structural support to the articular surface.The anatomical restoration of the joint can be performed either with elevation through a cortical window, through balloon-guided osteoplasty or direct visualisation of the articular surface.Structural support of the void created in the subchondral area can be achieved through the use of bone graft materials (autologous tricortical bone), or synthetic bone graft substitutes...
May 2017: EFORT open reviews
https://www.readbyqxmd.com/read/28629820/urodynamic-performance-in-boys-with-y-type-urethral-duplication
#16
Ye Zhang, Yanchao Qu, Lili Jiao, Weiping Zhang, Ning Sun, Jun Tian, Minglei Li, Hongcheng Song
PURPOSE: The aim of this study was to elucidate the urodynamic features of patients with Y-type urethral duplication. METHODS: Patients with Y-type urethral duplication were retrospectively analyzed. Clinical presentation, urodynamic findings, surgical methods, and treatment outcomes were reviewed. RESULTS: From 2014 to 2016, six boys were diagnosed with Y-type urethral duplication at our institution. All patients underwent urodynamic testing...
June 8, 2017: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/28629784/-from-paediatric-urological-care-to-adult-urology-assessment-of-a-transition-consultation-for-adolescents
#17
L Even, S Mouttalib, J Moscovici, M Soulie, P Rischmann, X Game, P Galinier, O Bouali
To provide an adequate lifelong urological care in the complex period of adolescence, a transition consultation conducted by a paediatric surgeon and an urologist was developed in our institution. As a real rite of passage, it allows the follow-up and the adapted care of urological conditions, sometimes complex, and permits the transition between childhood and the world of grown-ups. We reported our experience at the Children Hospital of our institution (paediatric surgery and urology departments). During a 6 months period (January-July 2015), forty-five young adults with a mean age of 17...
June 16, 2017: Progrès en Urologie
https://www.readbyqxmd.com/read/28625744/the-anterior-sagittal-transrectal-approach-astra-for-cases-associated-with-rectal-implantation-of-the-urethra-a-retrospective-review-of-six-cases
#18
A Macedo, M I S Silva, J A Pompermaier, S L Ottoni, R de Castro, M Leal da Cruz
INTRODUCTION: Severe genital abnormalities such as urogenital sinus and urethral duplication with ectopic urethra in the rectum represent a major challenge in reconstructive urology. OBJECTIVE: We aimed to review our cases presenting with functional ectopic urethra implanted in the rectum that were treated through an ASTRA approach. METHODS: We reviewed the medical records of all patients who had undergone an ASTRA approach from 2005-2016...
May 17, 2017: Journal of Pediatric Urology
https://www.readbyqxmd.com/read/28624553/comparison-of-the-effect-of-naptopidil-and-tamsulosin-on-the-bladder-storage-symptom-with-benign-prostatic-hyperplasia-prospective-multi-institutional-study
#19
Se Yun Kwon, Kyung Seop Lee, Tag Keun Yoo, Jae Il Chung, Ji Youl Lee, Jun Hyuk Hong, Seong Il Seo, Tae Young Jung, Cheol Kwak, Taek Won Kang, Seok-Joong Yun
OBJECTIVE: To compare the efficacies of naftopidil and tamsulosin in terms of reducing storage symptoms in patients with BPH. MATERIAL & METHODS: This prospective randomized study was performed at 10 centers. Ninety-four patients that had been taking tamsulosin for more than 8 weeks, but had an OABSS of greater than 3 points were initially enrolled. After a 1 week washout period, patients were divided into two groups. Forty-five patients were treated with tamsulosin 0...
June 14, 2017: Urology
https://www.readbyqxmd.com/read/28623266/design-of-a-peripheral-building-block-for-h-bonded-dendritic-frameworks-and-analysis-of-the-void-space-in-the-bulk-dendrimers
#20
Cheng-Hua Lee, Dmitriy V Soldatov, Chung-Hao Tzeng, Long-Li Lai, Kuang-Lieh Lu
Three dendrimers, (t-Bu-G 2 N) 2 , CC(t-Bu-G 1 N) 3 and (t-Bu-G 1 N) 2 , with 3,5-di-tert-butyl amidobenzene as a common peripheral moiety were prepared in 64-83% yields and characterized. The bulk solids had high BET surface areas of 136-138 m(2)/g, which were similar for the three dendrimers in spite of their different molecular weight (ranging from 1791 to 2890). It was concluded that the peripheral amide groups do not imbed in the interstitial space of neighbouring dendrimer molecules but rather build a supramolecular architecture through strong intermolecular H-bonds...
June 16, 2017: Scientific Reports
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