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https://www.readbyqxmd.com/read/29792306/predicting-the-viscosity-of-digesta-from-the-physical-characteristics-of-particle-suspensions-using-existing-rheological-models
#1
Allan K Hardacre, Roger G Lentle, Sia-Yen Yap, John A Monro
The measurement of the viscosity of digesta is complicated by settling and compositional changes that accompany digestion. The current work determined whether the apparent and relative viscosities ( η a and η r ) of digesta could be accurately determined from the actual and maximum solid volume fractions ( ϕ and ϕ max , respectively) using the Maron-Pierce equation. The rheological properties of digesta from the small intestine of six pigs were determined at a shear rate of 1 s-1 at 37°C. A series of suspensions of plant fibre in a Newtonian liquid (70% aqueous fructose) were made at viscosities similar to pig digesta by adjusting ϕ The relationships between the apparent and relative viscosities ( η a and η r ) and the plant fibre properties; aspect ratio (AR) and ϕ and ϕ max were then determined for digesta and the suspensions...
May 2018: Journal of the Royal Society, Interface
https://www.readbyqxmd.com/read/29786837/high-intensity-ultrasound-for-salmonella-enteritidis-inactivation-in-culture-and-liquid-whole-eggs
#2
Chayapa Techathuvanan, Doris Helen D'Souza
High intensity ultrasound (HIU) continues to be researched as a nonthermal inactivation technology of appeal to food manufacturers. The advantages of HIU include maintenance of product quality, freshness, product homogenization, along with simultaneous inactivation of pathogens. Besides, it is simple, relatively inexpensive, and easily adaptable to most processing environments. This study investigated the effect of HIU for Salmonella Enteritidis inactivation in culture and liquid whole eggs (LWEs) to decrease egg-associated outbreaks...
May 22, 2018: Journal of Food Science
https://www.readbyqxmd.com/read/29786755/cardiac-progenitor-cell%C3%A2-derived-exosomes-promote-h9c2-cell-growth-via-akt-mtor-activation
#3
Shentang Li, Jie Jiang, Zuocheng Yang, Zhuoying Li, Xing Ma, Xin Li
Exosomes are cell‑derived vesicles released from a variety of mammalian cells that are involved in cell‑to‑cell signalling. It has been reported that cardiac progenitor cells (CPCs) derived from an adult heart are one of the most promising stem cell types for cardioprotection and repair. The mammalian target of rapamycin (mTOR) signalling pathway is a pivotal regulator in CPCs, therefore, CPC‑derived exosomes were used in the present study to investigate whether it can promote H9C2 cell growth through the protein kinase B (PKB, or Akt)/mTOR signalling pathway...
May 21, 2018: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29785327/ex-vivo-confocal-microscopy-an-emerging-technique-in-dermatology
#4
Elisa Cinotti, Jean Luc Perrot, Bruno Labeille, Frédéric Cambazard, Pietro Rubegni
This review aims to give an overview of the current available applications of ex vivo confocal microscopy (EVCM) in dermatology. EVCM is a relatively new imaging technique that allows microscopic examination of freshly excised unfixed tissue. It enables a rapid examination of the skin sample directly in the surgery room and thus represents an alternative to the intraoperative micrographic control of the surgical margins of cutaneous tumors by standard microscopic examination on cryopreserved sections during Mohs surgery...
April 2018: Dermatology Practical & Conceptual
https://www.readbyqxmd.com/read/29784302/structural-characterization-of-resistant-starch-isolated-from-laird-lentils-lens-culinaris-seeds-subjected-to-different-processing-treatments
#5
Zhen Ma, Xiuxiu Yin, Xinzhong Hu, Xiaoping Li, Liu Liu, Joyce I Boye
This work focused on the structural characterization of resistant starch from untreated (UL-RS), germinated (GL-RS), fermented (FL-RS), microwaved (ML-RS), conventionally cooked (CL-RS), and autoclaved (AL-RS) lentil seeds. The size exclusion chromatography (SEC) results showed that UL-RS, RL-RS, and GL-RS (Group A samples) exhibited higher values of Mw and Rh ¯ than FL-RS, ML-RS, AL-RS (Group C samples), and CL-RS (Group B sample). In parallel with the SEC result, other structural characteristics followed similar trends, where Group C samples exhibited the lowest values of double helix content and crystallinity by 13 C NMR, and degree of order/double helix by FT-IR...
October 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29781850/comparing-processed-nerve-allografts-and-assessing-their-capacity-to-retain-and-release-nerve-growth-factor
#6
Alonda C Pollins, Richard B Boyer, Marlieke Nussenbaum, Wesley P Thayer
Peripheral nerve gap injuries continue to present a clinical challenge to today's surgeons. One method of surgical repair, implantation of acellular allografts, has been developed with the aim of bridging the gap with a cadaveric graft after removal of its cellular components, thereby accelerating axonal regeneration and eliminating the need for immunosuppression in recipient patients. Although decellularizing allografts reduces rates of graft rejection, the same chemical processing modifies the neural microenvironment, removing neutrotrophic factors and modifying the complex extracellular matrix...
May 17, 2018: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/29775436/modelling-the-degree-of-porosity-of-the-ceramic-surface-intended-for-implants
#7
Sebastian Stach, Olga Kędzia, Żaneta Garczyk, Zygmunt Wróbel
The main goal of the study was to develop a model of the degree of surface porosity of a biomaterial intended for implants. The model was implemented using MATLAB. A computer simulation was carried out based on the developed model, which resulted in a two-dimensional image of the modelled surface. Then, an algorithm for computerised image analysis of the surface of the actual oxide bioceramic layer was developed, which enabled determining its degree of porosity. In order to obtain the confocal micrographs of a few areas of the biomaterial, measurements were performed using the LEXT OLS4000 confocal laser microscope...
May 18, 2018: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/29774540/conservative-thickness-layers-in-mohs-micrographic-surgery
#8
Stanislav N Tolkachjov, Jonathan A Cappel, Elizabeth A Bryant, Christopher B Harmon
BACKGROUND: Mohs micrographic surgery (MMS) is used to treat cutaneous malignancies in locations to maximize tissue sparing. The authors' aim is to demonstrate the utility of conservative thickness layers (CTL) in MMS and review patient and tumor characteristics and the potential anatomic locations where this technique may be most useful. METHODS: We performed a retrospective chart review of patients with tumors treated with CTL in MMS of 339 tumors, recording patient demographics, tumor characteristics, MMS stages for clearance, repairs, complications, and follow-up...
May 17, 2018: International Journal of Dermatology
https://www.readbyqxmd.com/read/29770877/polishing-effects-and-wear-performance-of-chairside-cad-cam-materials
#9
Mike Matzinger, Sebastian Hahnel, Verena Preis, Martin Rosentritt
OBJECTIVES: To investigate the surface roughness of CAD/CAM materials immediately after milling and after different chairside and labside polishing procedures. A two-body wear test was performed to compare the different wear characteristics of the materials and the corresponding antagonists. MATERIALS AND METHODS: Specimens (n = 12 per series) from different CAD/CAM materials (three composites: Lava Ultimate, Cerasmart, BRILLIANT Crios; one hybrid ceramic: VITA Enamic; three ceramics: Celtra Duo, VITA Suprinity, IPS Emax...
May 16, 2018: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29770284/solitary-palmar-keratoacanthoma-case-report
#10
Raghavendra L Girijala, Young Kwak, David Wright, Leonard H Goldberg
Keratoacanthoma (KA) is a squamous neoplasm exhibiting a triphasic growth pattern involving rapid growth, stabilization, and eventual spontaneous resolution. Historically, keratoacanthomas were thought to originate on hair-bearing skin or sun-exposed surfaces. However, recent reports demonstrate that they can occur on the mucous membranes, subungual regions, and palms and soles. We report a 74-year-old man who developed a KA on the left palmar surface after minor trauma, for which he underwent Mohs' micrographic surgery...
March 15, 2018: Curēus
https://www.readbyqxmd.com/read/29768980/enhanced-steroidogenic-and-altered-antioxidant-response-by-zno-nanoparticles-in-mouse-testis-leydig-cells
#11
Nisha Bara, Gautam Kaul
Zinc oxide nanoparticles (ZnO NPs) are important nanomaterials with myriad applications and in widespread use. The main aim of this study was to evaluate the direct effect of ZnO NPs on steroidogenesis by considering mouse testicular Leydig cells (TM3) as an in vitro model system. The uptake, intracellular behaviour, cytotoxicity and morphological changes induced by ZnO NPs (0-200 µg/ml) in a time-dependent manner in the TM3 were assessed. A significant ( p < 0.05) decrease in TM3 viability was observed at 2 µg/ml ZnO NP after a 1-h incubation time period...
January 1, 2018: Toxicology and Industrial Health
https://www.readbyqxmd.com/read/29765274/review-of-eyelid-reconstruction-techniques-after-mohs-surgery
#12
REVIEW
Sagar Yatin Patel, Kamel Itani
Mohs micrographic surgery achieves high cure rates while preserving healthy tissue making it the optimal treatment for skin cancer. The goals of eyelid reconstruction after Mohs surgery include restoring eyelid structure and function while attaining acceptable aesthetic results. Given the variety of eyelid defects encountered after Mohs surgery, a thorough understanding of the complex eyelid anatomy as well as an in-depth knowledge of the numerous reconstructive techniques available are required to accomplish these reconstructive goals...
May 2018: Seminars in Plastic Surgery
https://www.readbyqxmd.com/read/29765269/mohs-micrographic-surgery-development-technique-and-applications-in-cutaneous-malignancies
#13
REVIEW
Eillen Luisa A Chen, Divya Srivastava, Rajiv I Nijhawan
Mohs micrographic surgery (MMS) is a specialized technique for treating skin malignancies that offers the highest cure rate by allowing histological evaluation of the entire peripheral and deep margins. MMS also maximally preserves as much uninvolved, normal adjacent tissue as possible, allowing for the best cosmetic and functional outcomes. When used for appropriate indications, this technique is also more cost-effective than other treatment modalities. In this article, the authors will discuss the development of MMS, the steps involved in this procedure, and the indications for this technique...
May 2018: Seminars in Plastic Surgery
https://www.readbyqxmd.com/read/29763492/perianal-extramammary-paget-disease-treated-with-topical-imiquimod-and-oral-cimetidine
#14
Jayla Gray, Arielle Gray, James Swan, Joshua Eberhardt, Kumaran Mudaliar, Rebecca Tung
Extramammary Paget disease (EMPD) is a rare intraepithelial adenocarcinoma. The current mainstay of treatment is wide local excision. We present the case of a 56-year-old woman with perianal EMPD that recurred 4 years after initial treatment with wide local excision with Mohs micrographic surgery tissue processing of marginal tissue. Upon recurrence with anal canal involvement, the patient was treated with a 16-week combination course of topical imiquimod and oral cimetidine. There is growing evidence to support both the use of topical imiquimod for the treatment of EMPD as well as the antioncogenic effects of oral cimetidine...
April 2018: Cutis; Cutaneous Medicine for the Practitioner
https://www.readbyqxmd.com/read/29763491/penile-squamous-cell-carcinoma-with-urethral-extension-treated-with-mohs-micrographic-surgery
#15
Ardeshir E Nadimi, Ali Hendi
Penile squamous cell carcinoma (SCC) with considerable urethral extension is uncommon and difficult to manage. It often is resistant to less invasive and nonsurgical treatments and frequently results in partial or total penectomy, which can lead to cosmetic disfigurement, functional issues, and psychological distress. We report a case of penile SCC in situ with considerable urethral extension with a focus of cells suspicious for moderately well-differentiated and invasive SCC that was treated with Mohs micrographic surgery (MMS)...
April 2018: Cutis; Cutaneous Medicine for the Practitioner
https://www.readbyqxmd.com/read/29760064/helical-rotation-of-the-diaphanous-related-formin-mdia1-generates-actin-filaments-resistant-to-cofilin
#16
Hiroaki Mizuno, Kotaro Tanaka, Sawako Yamashiro, Akihiro Narita, Naoki Watanabe
The complex interplay between actin regulatory proteins facilitates the formation of diverse cellular actin structures. Formin homology proteins (formins) play an essential role in the formation of actin stress fibers and yeast actin cables, to which the major actin depolymerizing factor cofilin barely associates. In vitro, F-actin decorated with cofilin exhibits a marked increase in the filament twist. On the other hand, a mammalian formin mDia1 rotates along the long-pitch actin helix during processive actin elongation (helical rotation)...
May 14, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29754602/retracted-imprinted-zno-nanostructure-based-electrochemical-sensing-of-calcitonin-a-clinical-marker-for-medullary-thyroid-carcinoma
#17
Santanu Patra, Ekta Roy, Rashmi Madhuri, Prashant K Sharma
This article has been retracted: please see Elsevier Policy on Article Withdrawal (https://www.elsevier.com/about/our-business/policies/article-withdrawal). This article has been retracted at the request of the Editor following concerns raised by various readers. The article reports different electron micrographs for different sample preparations, but some images are of different areas from the same sample. Figure 4E is a magnified section of Figure 4C, and the images are identical as demonstrated by overlapping the images and adjusting for magnification scale...
September 6, 2018: Analytica Chimica Acta
https://www.readbyqxmd.com/read/29753768/modification-of-collagen-with-three-novel-tannages-sulfonated-calix-4-arenes
#18
REVIEW
Yongxiang Zhou, Jianzhong Ma, Dangge Gao, Lu Jia, Kaitao Guo, Huijun Ren
Chromium (III) salts are the most extensively used tanning agents due to the higher quality and stabilization ability to leather collagen. However, chromium (III) salts tanning agent has a strong impact on the environment owing to the pollution of wastewater and the solid waste containing chrome. In order to crosslink the collagen by a cleaner method, three kinds of sulfonated calix[4]arenes {sulfonated calix[4]arene (SC), sulfonated tetraphenyl calix[4]resorcinarene (STCR), and sulfonated tetramethylene tetraphenyl calix[4]resorcinarene(STTCR)} were prepared and utilized for the collagen crosslinking and leather tanning...
May 10, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29753534/phenotypic-varieties-of-sperm-pathology-genetic-abnormalities-or-environmental-influences-can-result-in-different-patterns-of-abnormal-spermatozoa
#19
REVIEW
Hector E Chemes
The present paper reviews in detail ultrastructural and molecular studies addressed to characterize different phenotypes of sperm pathology in sterile men. In each case ultrastructural, immunocytochemical, molecular and genetic information is provided to differentiate two main kinds of sperm pathologies: systematic phenotypes with known or suspected genetic origin and non-systematic ones, usually secondary to different pathologies of the male reproductive system. Special attention is paid to detailed ultrastructural features profusely illustrated with electron micrographs...
April 20, 2018: Animal Reproduction Science
https://www.readbyqxmd.com/read/29748574/informative-three-dimensional-survey-of-cell-tissue-architectures-in-thick-paraffin-sections-by-simple-low-vacuum-scanning-electron-microscopy
#20
Akira Sawaguchi, Takeshi Kamimura, Atsushi Yamashita, Nobuyasu Takahashi, Kaori Ichikawa, Fumiyo Aoyama, Yujiro Asada
Recent advances in bio-medical research, such as the production of regenerative organs from stem cells, require three-dimensional analysis of cell/tissue architectures. High-resolution imaging by electron microscopy is the best way to elucidate complex cell/tissue architectures, but the conventional method requires a skillful and time-consuming preparation. The present study developed a three-dimensional survey method for assessing cell/tissue architectures in 30-µm-thick paraffin sections by taking advantage of backscattered electron imaging in a low-vacuum scanning electron microscope...
May 10, 2018: Scientific Reports
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