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https://www.readbyqxmd.com/read/28816606/scale-up-of-puf-immobilized-fungal-chitosanase-lipase-preparation-production
#1
Katarzyna Struszczyk-Świta, Łukasz Stańczyk, Mirosława Szczęsna-Antczak, Tadeusz Antczak
Mucor circinelloides IBT-83 mycelium that exhibits both lipolytic (AL) and chitosanolytic (ACH) activities was immobilized into polyurethane foam (PUF) in a 30 L laboratory fermenter. The process of immobilization was investigated in terms of: the carrier porosity, its type, amount and shape, location inside the fermenter, mixing and aeration parameters during the culture, as well as downstream processing operations. The selected conditions allowed for immobilization of approx. 7 g of defatted and dried mycelium in 1 g of carrier, i...
August 17, 2017: Preparative Biochemistry & Biotechnology
https://www.readbyqxmd.com/read/28814637/asymmetric-vestibular-stimulation-reveals-persistent-disruption-of-motion-perception-in-unilateral-vestibular-lesions
#2
Roberto Panichi, Mario Faralli, Rosa Bruni, Artemis Kiriakarely, Chiara Occhigrossi, Aldo Ferraresi, Adolfo M Bronstein, Vito Enrico Pettorossi
Self-motion perception was studied in patients with unilateral vestibular lesions (UVL) due to acute vestibular neuritis at 1 week, 4, 8 and 12 months after the acute episode. We assessed vestibularly-mediated self-motion perception by measuring the error in reproducing the position of a remembered visual target at the end of 4 cycles of asymmetric whole-body rotation. The oscillatory stimulus consists of a slow (0.09Hz) and a fast (0.38Hz) half cycle. A large error was present in UVL patients when the slow half cycle was delivered towards the lesion side, but minimal towards the healthy side...
August 16, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28814025/learning-from-demonstration-teaching-a-myoelectric-prosthesis-with-an-intact-limb-via-reinforcement-learning
#3
Gautham Vasan, Patrick M Pilarski
Prosthetic arms should restore and extend the capabilities of someone with an amputation. They should move naturally and be able to perform elegant, coordinated movements that approximate those of a biological arm. Despite these objectives, the control of modern-day prostheses is often nonintuitive and taxing. Existing devices and control approaches do not yet give users the ability to effect highly synergistic movements during their daily-life control of a prosthetic device. As a step towards improving the control of prosthetic arms and hands, we introduce an intuitive approach to training a prosthetic control system that helps a user achieve hard-to-engineer control behaviours...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28809095/isocyanate-free-uv-crosslinked-poly-hydroxyurethane-networks-a-sustainable-approach-toward-highly-functional-antibacterial-gels
#4
Geng Hua, Karin Odelius
An increased sustainabile awarness has inspired the development of new polymeric networks in a remarkable way and this strive should be combined with environmentally concerned end-uses. Therefore, a UV-crosslinked polyhydroxyurethane film with antibacterial properties is developed. First, a hydroxyurethane precursor is synthesized using aminolysis condensation, circumventing the use of isocyanates. The films are subsequently crosslinked under solvent-free conditions through a UV-triggered thiol-ene mechanism...
August 15, 2017: Macromolecular Bioscience
https://www.readbyqxmd.com/read/28805394/high-efficiently-delaminated-single-layered-mxene-nanosheets-with-large-lateral-size
#5
Gengnan Li, Li Tan, Yumeng Zhang, Binghan Wu, Liang Li
Single layered Ti3C2(OH)2 nanosheets have been successfully fabricated by etching its Ti3AlC2 precursor with KOH in the presence of small amount of water. The OH group replaced the Al layer within Ti3AlC2 structure during etching process and Ti3C2(OH)2 nanosheets could be easily and efficiently achieved through a simple washing process. The delaminated single layered nanosheets are clearly revealed by atomic force microscopy to have several micrometers in lateral size. Interestingly, the exfoliated Ti3C2(OH)2 nanosheets could be restacked to form a new layer-structured material during drying process...
August 14, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28802924/the-status-of-nonmotor-features-of-the-malady-in-an-essay-on-the-shaking-palsy-1817
#6
Brian Hurwitz
This chapter examines the status James Parkinson accorded "nonmotor" features of the malady set out in his 1817 Essay. In reading the Essay through the lens of this recently developed dichotomy I use "nonmotor" to mean the application of a late 20th-century category to a 200 year old account, whereas nonmotor designates application of the concept to contemporary understanding. While Parkinson granted "motor" components of the malady high definitional visibility, the Essay shows he was also attentive to patients' overall well-being and noticed some "nonmotor" aspects of the malady, in particular, constipation, interrupted speech, and difficulties with saliva and swallowing...
2017: International Review of Neurobiology
https://www.readbyqxmd.com/read/28802218/pharmaceutical-and-biomedical-applications-of-dispersive-liquid-liquid-microextraction
#7
REVIEW
Fotouh R Mansour, Mostafa A Khairy
Sample treatment is so crucial in pharmaceutical and biomedical analysis. Proper sample preparation protects the analytical instrument, increases the sensitivity, and enhances the selectivity by removing probable interfering substances. Dispersive liquid-liquid microextraction (DLLME) is one of the most important approaches in sample treatment. In normal DLLME, the organic droplet of the extractant is mixed with a dispersing solvent before being injected into the sample. After manual or mechanical shaking, the cloudy solution is centrifuged to break the formed emulsion...
August 1, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28802025/simple-and-rapid-determination-of-zaltoprofen-in-human-plasma-by-manual-shaking-assisted-dispersive-liquid-liquid-microextraction-followed-by-liquid-chromatography-with-ultraviolet-detection
#8
Se Young Han, Kyung Min Jeong, Da Eun Yoo, Yan Jin, Eun Mi Kim, Su Hyun Kim, Seok-Yong Lee, Se-Hyung Kim, Jing Zhao, Jeongmi Lee
A readily applicable method was developed to determine the concentration level of zaltoprofen, a non-steroidal anti-inflammatory drug from the propionic acid family, in human plasma. This method is based on manual shaking-assisted dispersive liquid-liquid microextraction coupled with liquid chromatography with UV detection. Factors affecting the extraction efficiency were screened and optimized by experimental design using fractional factorial and central composite designs, respectively. Optimal conditions were: 220 μL of C2 H4 Cl2 (extraction solvent), 5 mL of 3...
August 12, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28800398/a-13-week-randomized-pilot-trial-of-a-low-glycemic-load-diet-and-lifestyle-modification-program-combining-low-glycemic-load-protein-shakes-and-targeted-nutraceuticals-improved-weight-loss-and-cardio-metabolic-risk-factors-over-a-low-glycemic-load-diet-alone
#9
Clinton J Dahlberg, Joseph J Ou, John G Babish, Joseph J Lamb, Sarah Eliason, Holly Brabazon, Wei Gao, Mohan R Kaadige, Matthew L Tripp
An open label, randomized, exploratory study comprising 44 healthy, overweight subjects with cardio-metabolic syndrome (CMS) risk factors was conducted to assess the safety, tolerability and efficacy of a proprietary lifestyle modification program without (DIET) and with (PROG) targeted nutraceutical supplementation including soy, pea and whey proteins, phytosterols, antioxidants, probiotics, fish oil and berberine over 13-weeks. Key metrics were recorded at baseline, weeks 9 and 13. For DIET and PROG compliance was 85% and 86%, respectively, with no adverse events related to the diet or supplements...
August 11, 2017: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/28800117/iron-fortification-of-lentil-lens-culinaris-medik-to-address-iron-deficiency
#10
Rajib Podder, Bunyamin Tar'an, Robert T Tyler, Carol J Henry, Diane M DellaValle, Albert Vandenberg
Iron (Fe) deficiency is a major human health concern in areas of the world in which diets are often Fe deficient. In the current study, we aimed to identify appropriate methods and optimal dosage for Fe fortification of lentil (Lens culinaris Medik.) dal with FeSO₄·7H₂O (ferrous sulphate hepta-hydrate), NaFeEDTA (ethylenediaminetetraacetic acid iron (III) sodium salt) and FeSO₄·H₂O (ferrous sulphate mono-hydrate). We used a colorimetric method to determine the appearance of the dal fortified with fortificants at different Fe concentrations and under different storage conditions...
August 11, 2017: Nutrients
https://www.readbyqxmd.com/read/28799259/two-hundred-years-since-james-parkinson-s-essay-on-the-shaking-palsy-have-we-made-progress-insights-from-the-james-parkinson-s-200-years-course-held-in-london-march-2017
#11
REVIEW
K Ray Chaudhuri, Peter Jenner
No abstract text is available yet for this article.
August 11, 2017: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/28798045/global-mrna-polarization-regulates-translation-efficiency-in-the-intestinal-epithelium
#12
Andreas E Moor, Matan Golan, Efi E Massasa, Doron Lemze, Tomer Weizman, Rom Shenhav, Shaked Baydatch, Orel Mizrahi, Roni Winkler, Ofra Golani, Noam Stern-Ginossar, Shalev Itzkovitz
Asymmetric mRNA localization facilitates efficient translation in cells such as neurons and fibroblasts. However, the extent and significance of mRNA polarization in epithelial tissues are unclear. Here, we used single molecule transcript imaging and subcellular transcriptomics to uncover global apical-basal intracellular polarization of mRNA in the mouse intestinal epithelium. The localization of mRNAs did not generally overlap protein localization. Instead, ribosomes were more abundant on the apical sides, and apical transcripts were consequently more efficiently translated...
August 10, 2017: Science
https://www.readbyqxmd.com/read/28797413/shaking-and-breaking-calcified-plaque-lithoplasty-a-breakthrough-in-interventional-armamentarium
#13
EDITORIAL
Patrick W Serruys, Yuki Katagiri, Yoshinobu Onuma
No abstract text is available yet for this article.
August 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28797225/environmentally-triggered-genomic-plasticity-and-capsular-polysaccharide-formation-are-involved-in-increased-ethanol-and-acetic-acid-tolerance-in-kozakia-baliensis-nbrc-16680
#14
Julia U Brandt, Friederike-Leonie Born, Frank Jakob, Rudi F Vogel
BACKGROUND: Kozakia baliensis NBRC 16680 secretes a gum-cluster derived heteropolysaccharide and forms a surface pellicle composed of polysaccharides during static cultivation. Furthermore, this strain exhibits two colony types on agar plates; smooth wild-type (S) and rough mutant colonies (R). This switch is caused by a spontaneous transposon insertion into the gumD gene of the gum-cluster, resulting in a heteropolysaccharide secretion deficient, rough phenotype. To elucidate, whether this is a directed switch triggered by environmental factors, we checked the number of R and S colonies under different growth conditions including ethanol and acetic acid supplementation...
August 10, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28796229/shake-up-conferences
#15
Shai D Silberberg, Devon C Crawford, Robert Finkelstein, Walter J Koroshetz, Robert D Blank, Hudson H Freeze, Howard H Garrison, Yvette R Seger
No abstract text is available yet for this article.
August 9, 2017: Nature
https://www.readbyqxmd.com/read/28791643/cell-cycle-synchronization-of-hela-cells-to-assay-egfr-pathway-activation
#16
Ping Wee, Zhixiang Wang
Progression through the cell cycle causes changes in the cell's signaling pathways that can alter EGFR signal transduction. Here, we describe drug-derived protocols to synchronize HeLa cells in various phases of the cell cycle, including G1 phase, S phase, G2 phase, and mitosis, specifically in the mitotic stages of prometaphase, metaphase, and anaphase/telophase. The synchronization procedures are designed to allow synchronized cells to be treated for EGF and collected for the purpose of Western blotting for EGFR signal transduction components...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28782952/biotransformation-of-chrysin-to-baicalein-selective-c6-hydroxylation-of-5-7-dihydroxyflavone-using-whole-yeast-cells-stably-expressing-human-cyp1a1-enzyme
#17
Ibidapo S Williams, Shifali Chib, Vijay K Nuthakki, Linda Gatchie, Prashant Joshi, Niteen A Narkhede, Ram A Vishwakarma, Sandip B Bharate, Saurabh Saran, Bhabatosh Chaudhuri
Naturally occurring polyphenolic compounds are of medicinal importance because of their unique antioxidant, anticancer, and chemopreventive properties. Baicalein, a naturally occurring polyhydroxy flavonoid possessing a diverse range of pharmacological activities, has been used in traditional medicines for treatment of various ailments. Apart from its isolation from natural sources, its synthesis has been reported via multistep chemical approaches. Here, we report a preparative-scale biotransformation, using whole yeast cells stably expressing human cytochrome P450 1A1 (CYP1A1) enzyme that allows regioselective C6-hydroxylation of 5,7-dihydroxyflavone (chrysin) to form 5,6,7-trihydroxyflavone (baicalein)...
August 15, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28782796/combination-of-traditional-mutation-and-metabolic-engineering-to-enhance-ansamitocin-p-3-production-in-actinosynnema-pretiosum
#18
Zhi-Qiang Du, Yuan Zhang, Zhi-Gang Qian, Han Xiao, Jian-Jiang Zhong
Ansamitocin P-3 (AP-3) is a maytansinoid with its most compelling antitumor activity, however, the low production titer of AP-3 greatly restricts its wide commercial application. In this work, a combinatorial approach including random mutation and metabolic engineering was conducted to enhance AP-3 biosynthesis in Actinosynnema pretiosum. Firstly, a mutant strain M was isolated by N-methyl-N'-nitro-N-nitrosoguanidine mutation, which could produce AP-3 almost 3-fold that of wild type in 48 deep-well plates. Then, by overexpressing key biosynthetic genes asmUdpg and asm13-17 in the M strain, a further 60% increase of AP-3 production in 250-mL shake flasks was achieved in the engineered strain M-asmUdpg:asm13-17 compared to the M strain, and its maximum AP-3 production reached 582...
August 7, 2017: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/28780391/structural-characterization-and-physicochemical-stability-profile-of-a-double-mutant-heat-labile-toxin-dmlt-protein-based-adjuvant
#19
Vishal M Toprani, John M Hickey, Neha Sahni, Ronald T Toth, George A Robertson, C Russell Middaugh, Sangeeta B Joshi, David B Volkin
A novel protein adjuvant double mutant E.coli heat labile toxin, LT(R192G/L211A) or dmLT, is in preclinical and early clinical development with various vaccine candidates. Structural characterization and formulation development of dmLT will play a key role in its successful process development, scale-up/transfer and commercial manufacturing. This work describes extensive analytical characterization of structural integrity and physicochemical stability profile of dmLT from a lyophilized clinical formulation...
August 2, 2017: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28777419/the-neutraclear%C3%A2-needleless-connector-is-equally-effective-against-catheter-colonization-compared-to-microclave%C3%A2
#20
María Guembe, María Jesús Pérez Granda, Raquel Cruces, Luis Alcalá, Emilio Bouza
INTRODUCTION: Neutral-valve closed-system connectors can reduce the frequency of catheter colonization. Commercially available closed system connectors need to be tested and compared with each other to assess how they protect against contamination. We aimed to compare, in vitro, the efficacy of connectors NeutraClear® and MicroClave® against contamination under conditions of daily clinical practice. METHODS: The model consisted of a set of 200 blood culture bottles (BCBs) with a cannula inserted (100 closed with NeutraClear® and 100 closed with MicroClave®) that were assessed in two experiments while instilling 1 mL of saline: manipulation based on the standard of care and manipulation using gloves impregnated with a 0...
July 29, 2017: Journal of Vascular Access
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