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https://www.readbyqxmd.com/read/28923973/flow-induced-gelation-of-microfiber-suspensions
#1
Antonio Perazzo, Janine K Nunes, Stefano Guido, Howard A Stone
The flow behavior of fiber suspensions has been studied extensively, especially in the limit of dilute concentrations and rigid fibers; at the other extreme, however, where the suspensions are concentrated and the fibers are highly flexible, much less is understood about the flow properties. We use a microfluidic method to produce uniform concentrated suspensions of high aspect ratio, flexible microfibers, and we demonstrate the shear thickening and gelling behavior of such microfiber suspensions, which, to the best of our knowledge, has not been reported previously...
September 18, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28923599/-theranostic-role-of-bile-salt-capped-silver-nanoparticles-gall-stone-pigment-stone-disruption-and-anticancer-activity
#2
Ranju Prasad Mandal, Gunjan Mandal, Sudeshna Sarkar, Arindam Bhattacharyya, Swati De
Silver nanoparticles (AgNPs) have been synthesized in situ in micelles formed by the bile salt sodium deoxycholate (NaDC). The AgNPs exhibit "green" fluorescence. It has been shown in the present study that they can disrupt the components of gall stones/pigment stones. This unique ability of the AgNPs has been observed upon detailed study of the interaction between the endobiotic pigment bilirubin (BR) and bile salt (NaDC). In addition, these AgNPs show significant cytotoxicity towards the breast cancer cells (MCF-7)...
September 5, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28916274/do-urinary-cystine-parameters-predict-clinical-stone-activity
#3
Justin I Friedlander, Jodi A Antonelli, Noah E Canvasser, Monica S C Morgan, Daniel Mollengarden, Sara Best, Margaret S Pearle
PURPOSE: An accurate urinary predictor of stone recurrence would be clinically advantageous for patients with cystinuria. A proprietary assay from Litholink® (Chicago, IL) measures cystine capacity as a potentially more reliable estimate of stone-forming propensity. The recommended capacity level to prevent stone formation, >150 mg/L, has not been directly correlated with clinical stone activity. Herein we investigated the relationship between urinary cystine parameters and clinical stone activity...
September 12, 2017: Journal of Urology
https://www.readbyqxmd.com/read/28912989/vaginal-urinary-calculi-formation-secondary-to-vaginal-mesh-exposure-with-urinary-incontinence
#4
Kara M Griffiths, Geoffrey D Towers, Jerome L Yaklic
BACKGROUND: Vaginal stones may form in the setting of mesh exposure with urinary incontinence. This report serves to help understand the presentation, evaluation, and management of vaginal urinary stones. CASE: A 68-year-old female presented with a vaginal calculus. She had a history of anterior and posterior polypropylene mesh placement for prolapse 7 years earlier and urinary incontinence. The stone was identified on a portion of exposed mesh and removed in office...
2017: Case Reports in Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28903179/antinociceptive-anti-inflammatory-and-anxiolytic-like-effects-of-the-ethanolic-extract-fractions-and-hibalactone-isolated-from-hydrocotyle-umbellata-l-acari%C3%A3-oba-araliaceae
#5
Thiago Levi Silva Oliveira, Sandra Ribeiro de Morais, Stone de Sá, Matheus Gabriel de Oliveira, Iziara Ferreira Florentino, Dayane Moreira da Silva, Verônica Vale Carvalho, Vinícius Barreto da Silva, Boniek Gontijo Vaz, José Ricardo Sabino, Elson Alves Costa, José Realino de Paula
Hydrocotyle umbellata Linn. (Araliaceae) is specie used in the treatment of inflammatory diseases. Crude extract (E-HU) was prepared from H. umbellata subterraneous parts and fractionated by liquid-liquid partition, resulting hexane fraction (HF-HU), dichloromethane fraction (DF-HU), ethyl acetate fraction (EAF-HU) and aqueous fraction (AF-HU). The hibalactone (HU-1) was isolated from the DF-HU and its structure was elucidated by (1)H NMR and (13)C NMR Spectroscopy, mass spectrometry and crystallographic x-ray analysis...
September 9, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28900729/microbial-healing-of-cracks-in-concrete-a-review
#6
REVIEW
Sumit Joshi, Shweta Goyal, Abhijit Mukherjee, M Sudhakara Reddy
Concrete is the most widely used construction material of the world and maintaining concrete structures from premature deterioration is proving to be a great challenge. Early age formation of micro-cracking in concrete structure severely affects the serviceability leading to high cost of maintenance. Apart from conventional methods of repairing cracks with sealants or treating the concrete with adhesive chemicals to prevent the cracks from widening, a microbial crack-healing approach has shown promising results...
September 12, 2017: Journal of Industrial Microbiology & Biotechnology
https://www.readbyqxmd.com/read/28900379/postmenopausal-hormone-and-the-risk-of-nephrolithiasis-a-meta-analysis
#7
Juan Yu, Binyan Yin
Menopause is reported to be associated with increased urinary calcium excretion, which may enhance the risk for the development of calcium kidney stones. However, it remains controversial about whether high level of postmenopausal hormone (PMH) is a risk factor for formation of nephrolithiasis. Several observational studies have shown that PMH is protective based on 24-hour urinary parameters. Recent clinical trials provided evidence to conclude that estrogen therapy increases the risk of nephrolithiasis in healthy postmenopausal women...
2017: EXCLI journal
https://www.readbyqxmd.com/read/28892251/genomes-of-rumen-bacteria-encode-atypical-pathways-for-fermenting-hexoses-to-short-chain-fatty-acids
#8
Timothy J Hackmann, David Kamanda Ngugi, Jeffrey L Firkins, Junyi Tao
Bacteria have been thought to follow only a few well-recognized biochemical pathways when fermenting glucose or other hexoses. These pathways have been chiseled in the stone of textbooks for decades, with most sources rendering them as they appear in the classic 1986 text by Gottschalk. Still, it is unclear how broadly these pathways apply, given that they were established and delineated biochemically with only a few model organisms. Here we show that well-recognized pathways often cannot explain fermentation products formed by bacteria...
September 11, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28886192/influence-of-weight-status-on-24-hour-urine-composition-in-adults-without-urolithiasis-a-nationwide-study-based-on-a-chinese-han-population
#9
Tuo Deng, Zanlin Mai, Chao Cai, Xiaolu Duan, Wei Zhu, Tao Zhang, Wenqi Wu, Guohua Zeng
OBJECTIVES: This study sought to explore the influence of different body weight statuses on 24-hour urine compositions in adults without urolithiasis based on a nationwide study of a Chinese Han population. MATERIAL AND METHODS: Twenty-four-hour urine samples from 584 Chinese Han adults without urolithiasis in six cities were analyzed. The participants were divided into four body weight status types according to their body mass indices (BMIs) according to WHO guidelines...
2017: PloS One
https://www.readbyqxmd.com/read/28883679/the-relationship-between-nephrolithiasis-risk-with-body-fat-measured-by-body-composition-analyzer-in-obese-people
#10
Zohreh Bartani, Behzad Heydarpour, Ahmad Alijani, Masoud Sadeghi
BACKGROUND: Nephrolithiasis (kidney stones) continues to be a major cause of morbidity and healthcare spending that visceral and subcutaneous adipose tissue may associate with kidney stone formation. This study aimed to investigate the relationship between nephrolithiasis with visceral fat scale in obese people in Western Iran for the first time. MATERIALS AND METHODS: In 2017, 103 participants with BMI≥30 kg/m(2) were selected for the present study. The participants were divided into two groups, 52 as case group (having the kidney stone) and 58 as healthy control group (no kidney stone or history of the kidney stone or any other disease)...
June 2017: Acta Informatica Medica: AIM
https://www.readbyqxmd.com/read/28881585/c-ebp-%C3%AE-positively-regulates-mdsc-expansion-and-endothelial-vegfr2-expression-in-tumor-development
#11
Yongfen Min, Jingdong Li, Peng Qu, P Charles Lin
Vascular endothelial cells and Gr-1+CD11b+ myeloid derived suppressor cells (MDSCs) are two important components that constitute the tumor microenvironment. Targeting these cells offers the potential to halt tumor growth. In this study, we report a common mediator in C/EBP-δ that regulates both components and aids in tumor development. C/EBP-δ is elevated in tumor derived MDSCs. Interestingly, genetic deletion of C/EBP-δ in mice significantly impaired MDSC expansion in response to tumor progression, but it had no effect on Gr-1+CD11b+ cell production in normal development...
August 1, 2017: Oncotarget
https://www.readbyqxmd.com/read/28876644/liver-function-tests-in-predicting-cbd-stones-in-acute-biliary-pancreatitis
#12
J T Thomson, M D Smith, J A O Omoshoro-Jones, J D Devar, P D Gaylard, Z K Khan, B J Jugmohan
BACKGROUND: Acute biliary pancreatitis is a significant cause of pancreatitis. The role and timing of endoscopic retrograde cholangiopancreatography in the setting of acute biliary pancreatitis is still controversial. Persistent choledocholithiasis in acute biliary pancreatitis occurs and establishing which patients require an endoscopic retrograde cholangiopancreatography based on liver function tests only can be challenging. METHOD: Retrospective analysis of the Chris Hani Baragwanath Academic Hospital's ERCP database was performed...
June 2017: South African Journal of Surgery. Suid-Afrikaanse Tydskrif Vir Chirurgie
https://www.readbyqxmd.com/read/28875258/molecular-analysis-of-oxalate-induced-endoplasmic-reticulum-stress-mediated-apoptosis-in-the-pathogenesis-of-kidney-stone-disease
#13
Albert Abhishek, Shaly Benita, Monika Kumari, Divya Ganesan, Eldho Paul, Ponnusamy Sasikumar, Ayyavu Mahesh, Subramani Yuvaraj, Tharmarajan Ramprasath, Govindan Sadasivam Selvam
Oxalate, a non-essential end product of metabolism, causes hyperoxaluria and eventually calcium oxalate (CaOx) stone disease. Kidney cells exposed to oxalate stress results in generation of reactive oxygen species (ROS) and progression of stone formation. Perturbations in endoplasmic reticulum (ER) result in accumulation of misfolded proteins and Ca(2+) ions homeostasis imbalance and serve as a common pathway for various diseases, including kidney disorders. ER stress induces up-regulation of pro-survival protein glucose-regulated protein 78 (GRP78) and pro-apoptotic signaling protein C/EBP homologous protein (CHOP)...
September 5, 2017: Journal of Physiology and Biochemistry
https://www.readbyqxmd.com/read/28874183/urethral-calculi-with-a-urethral-fistula-a-case-report-and-review-of-the-literature
#14
Mingqiang Zeng, Fanchang Zeng, Zhao Wang, Ruizhi Xue, Liang Huang, Xuyu Xiang, Zhi Chen, Zhengyan Tang
BACKGROUND: To explore and summarize the reasons why urethral calculi cause a urethral fistula. CASE PRESENTATION: We retrospectively studied 1 patient in Xiangya hospital and all relevant literature published in English between 1989 and 2015. The patients (including those reported in the literature) were characterized by age, origin, location of calculus, size of calculus, fistulous track, and etiological factors. Most of urethral calculi associated with a urethral fistula were native generated...
September 6, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28870375/dietary-traits-of-the-ungulates-from-the-hwk-ee-site-at-olduvai-gorge-tanzania-diachronic-changes-and-seasonality
#15
Florent Rivals, Kevin T Uno, Faysal Bibi, Michael C Pante, Jackson Njau, Ignacio de la Torre
The Oldowan site HWK EE (Olduvai Gorge, Tanzania) has yielded a large fossil and stone tool assemblage at the transition from Lower to Middle Bed II, ∼1.7 Ma. Integrated tooth wear and stable isotope analyses were performed on the three most abundant ungulate taxa from HWK EE, namely Alcelaphini, cf. Antidorcas recki (Antilopini) and Equus oldowayensis (Equini), to infer dietary traits in each taxon. Some paleodietary changes were observed for cf. A. recki and E. oldowayensis based on tooth wear at the transition from the Lemuta to the Lower Augitic Sandstone (LAS) interval within the HWK EE sequence...
September 1, 2017: Journal of Human Evolution
https://www.readbyqxmd.com/read/28869408/involvement-of-signal-peptidase-i-in-streptococcus-sanguinis-biofilm-formation
#16
Jessica Aynapudi, Fadi El-Rami, Xiuchun Ge, Victoria Stone, Bin Zhu, Todd Kitten, Ping Xu
Biofilm accounts for 65-80 % of microbial infections in humans. Considerable evidence links biofilm formation by oral microbiota to oral disease and consequently systemic infections. Streptococcus sanguinis, a Gram-positive bacterium, is one of the most abundant species of the oral microbiota and it contributes to biofilm development in the oral cavity. Due to its altered biofilm formation, we investigated a biofilm mutant, ΔSSA_0351, that is deficient in type I signal peptidase (SPase) in this study. Although the growth curve of the ΔSSA_0351 mutant showed no significant difference from that of the wild-type strain SK36, biofilm assays using both microtitre plate assay and confocal laser scanning microscopy (CLSM) confirmed a sharp reduction in biofilm formation in the mutant compared to the wild-type strain and the paralogous mutant ΔSSA_0849...
September 4, 2017: Microbiology
https://www.readbyqxmd.com/read/28865885/stone-growth-patterns-and-risk-for-surgery-among-children-presenting-with-hypercalciuria-hypocitraturia-and-cystinuria-as-underlying-metabolic-causes-of-urolithiasis
#17
F Zu'bi, M Sidler, E Harvey, R I Lopes, A Hojjat, N Naoum, M Pokarowski, A J Lorenzo, W A Farhat, F Papanikolaou, J Dos Santos
INTRODUCTION: Hypercalciuria, hypocitraturia and cystinuria are the most common underlying metabolic stone abnormalities in children. The present study compared stone growth patterns, stone burden, and the risk of stone-related surgery among these underlying metabolic conditions. METHODS: A retrospective cohort of 356 children with renal stones, followed from 2000 to 2015, was studied. Differences among metabolic groups were determined using Kruskal-Wallis test; the Scheffé-test was used for multiple comparisons to determine differences among single groups...
August 4, 2017: Journal of Pediatric Urology
https://www.readbyqxmd.com/read/28863265/structure-property-relationships-in-sodium-muricholate-derivative-bile-salts-micellization-the-effect-of-conformation-of-steroid-skeleton-on-hydrophobicity-and-micelle-formation-pattern-recognition-and-potential-membranoprotective-properties
#18
Mihalj Poša, Kosta Popović
It is known that β-muricholic acid anions prevent membrane toxicity of hydrophobic bile acids, which are being used in therapy for solubilization of the cholesterol type bile stone. Better knowledge of these derivative micelles is very important for understanding their physiological and pharmacological effects. β-Axial (a) oriented hydroxyl group from the steroid skeleton decreases the hydrophobic surface of the convex side of the steroid skeleton. Therefore, the critical micellization concentration (CMC) for steroid surfactants with β-a-OH group should increase, but in the case of OH groups of different orientations forming H-bonds in the hydrophobic phase of the micelle, it has the opposite effect; the CMC decreses, and aggregation is more favored...
September 13, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28855341/cns-resident-progenitors-direct-the-vascularization-of-neighboring-tissues
#19
Ryota L Matsuoka, Andrea Rossi, Oliver A Stone, Didier Y R Stainier
Organ growth requires the coordinated invasion and expansion of blood vessel networks directed by tissue-resident cells and morphogenetic cues. A striking example of this intercellular communication is the vascularization of the central nervous system (CNS), which is driven by neuronal progenitors, including neuroepithelial cells and radial glia. Although the importance of neuronal progenitors in vascular development within the CNS is well recognized, how these progenitors regulate the vasculature outside the CNS remains largely unknown...
August 30, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28853105/different-approaches-to-detect-nanobacteria-in-patients-with-kidney-stones-an-infectious-cause-or-a-subset-of-life
#20
Hani Ansari, Abbas Akhavan Sepahi, Mohsen Akhavan Sepahi
PURPOSE: This research focused on the detection of nanobacteria in kidney stones of 30 Iranian patients without adding fetal bovine serum (FBS) to the culture media. MATERIALS AND METHODS: Nanobacteria were isolated from a nephro-ureterolithiasis extract of the urinary tract and kidney of patients and were cultured in the laboratory. The growth of nanobacteria was monitored using a spectrophotometer, and with inverted microscopy technique, their crystallization was analyzed after two days...
August 29, 2017: Urology Journal
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