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https://www.readbyqxmd.com/read/28526924/effects-of-water-ph-on-life-history-parameters-of-a-new-bosminid-cladocera-bosmina-bosmina-tripurae-korinek-saha-and-bhattachaya-1999-in-laboratory-condition
#1
Himadri Saha, K S Wisdom, Asem Lembika Devi, Da-U-Ruhi Pde, Sukham Tuni Devi, Makamguang Kamei, Anamika Biswas, Ratan K Saha, Prasenjit Pal
The effects of water pH on life history parameters of Bosmina tripurae have been studied to determine the most suitable water pH desired for the maximum growth and development of this newly discovered cladoceran species. The study was carried out under the laboratory condition at 20 ± 2°C. Five pH ranges 5.0 ± 0.2, 6.0 ± 0.2, 7.0 ± 0.2, 8.0 ± 0.2 and 9.0 ± 0.2 with six replicates for each pH consisting of one animal in each Petri dish (80 × 15 mm) were used for the study...
May 19, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28525761/impact-of-bioactive-packaging-systems-based-on-evoh-films-and-essential-oils-in-the-control-of-aflatoxigenic-fungi-and-aflatoxin-production-in-maize
#2
Eva M Mateo, José V Gómez, Irene Domínguez, Jose V Gimeno-Adelantado, Rufino Mateo-Castro, Rafael Gavara, Misericordia Jiménez
Aspergillus flavus and A. parasiticus are the most common fungal species associated with aflatoxin (AF) contamination of cereals, especially maize, and other agricultural commodities. AFB1, the most frequent and toxic metabolite, is a powerful hepatotoxic, teratogenic and mutagenic compound. Effective strategies to control these fungal species and AFs in food and feed are required. Active packaging film containing essential oils (EO) is one of the most innovative food packaging concepts. In this study, ethylene-vinyl alcohol (EVOH) copolymer films incorporating EO from Origanum vulgare (ORE), Cinnamomum zeylanicum (CIN) or their major active constituents, carvacrol (CAR) and cinnamaldehyde (CINHO), respectively, were developed and assayed to control growth of A...
May 11, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28518093/determining-the-optimal-inhibitory-frequency-for-cancerous-cells-using-tumor-treating-fields-ttfields
#3
Yaara Porat, Moshe Giladi, Rosa S Schneiderman, Roni Blat, Anna Shteingauz, Einav Zeevi, Mijal Munster, Tali Voloshin, Noa Kaynan, Orna Tal, Eilon D Kirson, Uri Weinberg, Yoram Palti
Tumor Treating Fields (TTFields) are an effective treatment modality delivered via the continuous, noninvasive application of low-intensity (1-3 V/cm), alternating electric fields in the frequency range of several hundred kHz. The study of TTFields in tissue culture is carried out using the TTFields in vitro application system, which allows for the application of electric fields of varying frequencies and intensities to ceramic Petri dishes with a high dielectric constant (Ɛ > 5,000). Cancerous cell lines plated on coverslips at the bottom of the ceramic Petri dishes are subjected to TTFields delivered in two orthogonal directions at various frequencies to facilitate treatment outcome tests, such as cell counts and clonogenic assays...
May 4, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28515403/analysis-of-wheat-allergen-dispersed-in-air-by-the-action-of-three-types-of-flour-sifter
#4
Hiroyuki Hashimoto, Masato Yoshimitsu, Kyohei Kiyota
BACKGROUND: Since wheat flour, a cause of food allergy, tends to disperse rapidly in air, it can unintentionally mix other foods during the sieving process. Our aim was to analyze the dispersal of wheat flour dust in air in order to prevent unintentional mixing. METHODS: We measured particle size distribution of wheat flour, photographed the scattered flour for 60 seconds every 10 seconds after sieving through three types of flour sifter, constructed a velocity vector diagram of flour dust dispersal by each type of sifter, and measured the distance of wheat allergen dispersal over 20 minutes using a petri dish and immunochromatographic test...
2017: Arerugī, [Allergy]
https://www.readbyqxmd.com/read/28514893/cytocompatible-polyion-complex-gel-of-poly-pro-hyp-gly-for-simultaneous-rat-bone-marrow-stromal-cell-encapsulation
#5
Farah Nurlidar, Mime Kobayashi, Kayo Terada, Tsuyoshi Ando, Masao Tanihara
Polyion complex (PIC) gel of poly(Pro-Hyp-Gly) was successfully fabricated by simply mixing polyanion and polycation derivatives of poly(Pro-Hyp-Gly), a collagen-like polypeptide. The polyanion, succinylated poly(Pro-Hyp-Gly), and the polycation, arginylated poly(Pro-Hyp-Gly), contain carboxy (pKa = 5.2) and guanidinium (pKa = 12.4) groups, respectively. Mixing the polyanion and the polycation at physiological pH (pH = 7.4) resulted in PIC gel. The hydrogel formation was optimum at an equimolar ratio of carboxy to guanidinium groups, suggesting that ionic interaction is the main determinant for the hydrogel formation...
May 18, 2017: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/28512652/comparison-of-simplistic-biofilm-models-for-%C3%A2-evaluating-irrigating-solutions
#6
Maximilian Gänsbauer, Andreas Burkovski, Matthias Karl, Tanja Grobecker-Karl
OBJECTIVE: Many innovations have recently been implemented in the field of endodontics, often based on a variety of in-vitro/ex-vivo test setups. It was the goal of this research to compare different biofilm models for evaluating the effectiveness of rinsing solutions. METHOD AND MATERIALS: Three different models have been applied in this study, including petri dishes with nutrient medium, arrays of human dentin disks, and split bovine root segments. The susceptibility of biofilms formed by Enterococcus faecalis to commonly used endodontic irrigants was tested...
May 16, 2017: Quintessence International
https://www.readbyqxmd.com/read/28507166/matrix-stiffness-regulates-migration-of-human-lung-fibroblasts
#7
Shuichi Asano, Satoru Ito, Kota Takahashi, Kishio Furuya, Masashi Kondo, Masahiro Sokabe, Yoshinori Hasegawa
In patients with pulmonary diseases such as idiopathic pulmonary fibrosis and severe acute respiratory distress syndrome, progressive pulmonary fibrosis is caused by dysregulated wound healing via activation of fibroblasts after lung inflammation or severe damage. Migration of fibroblasts toward the fibrotic lesions plays an important role in pulmonary fibrosis. Fibrotic tissue in the lung is much stiffer than normal lung tissue. Emerging evidence supports the hypothesis that the stiffness of the matrix is not only a consequence of fibrosis, but also can induce fibroblast activation...
May 2017: Physiological Reports
https://www.readbyqxmd.com/read/28506899/hepatoprotective-activities-of-antrodia-camphorata-and-its-triterpenoid-compounds-against-ccl4-induced-liver-injury-in-mice
#8
Zi-Wei Li, Yi Kuang, Shu-Nan Tang, Kai Li, Yun Huang, Xue Qiao, Si-Wang Yu, Yew-Min Tzeng, Jen-Yu Lo, Min Ye
ETHNOPHARMACOLOGY RELEVANCE: Antrodia camphorata (AC) is a rare and precious fungus indigenous to Taiwan used as a traditional medicine for the treatment of liver injury. Triterpenoids are the major bioactive constituents of A. camphorata and have been reported to possess hepatoprotective activities. To meet the increasing demand, artificial cultivation techniques have been developed. AIM OF THE STUDY: This study aims to evaluate the hepatoprotective activities of AC samples derived from different cultivation techniques and to dissect the main active triterpenoid compounds...
May 12, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28505084/food-sources-of-energy-and-nutrients-in-infants-toddlers-and-young-children-from-the-mexican-national-health-and-nutrition-survey-2012
#9
Liya Denney, Myriam C Afeiche, Alison L Eldridge, Salvador Villalpando-Carrión
Food sources of nutrients in Mexican children are not well known. To fill the knowledge gap, dietary intake was assessed in 2057 children using a 24-hour dietary recall. All reported foods and beverages were assigned to one of 76 food groups. Percent contribution of each food group to nutrient intake was estimated for four age groups: 0-5.9, 6-11.9, 12-23.9, and 24-47.9 months. Breast milk, infant formula, and cow's milk were the top sources of energy and nutrients, especially in younger groups. Among infants aged 6-11...
May 13, 2017: Nutrients
https://www.readbyqxmd.com/read/28495800/mechanically-patterned-neuromuscular-junctions-in-a-dish-have-improved-functional-maturation
#10
Cassandra L Happe, Kevin P Tenerelli, Anastasia K Gromova, Frederic Kolb, Adam J Engler
Motor neuron (MN) diseases are progressive disorders resulting from degeneration of neuromuscular junctions (NMJs), which form the connection between MNs and muscle fibers. NMJ-in-a-dish models have been developed to examine human MN-associated dysfunction with disease; however such co-culture models have randomly oriented myotubes with immature synapses that contract asynchronously. Mechanically patterned (MP) extracellular matrix with alternating soft and stiff stripes improve current NMJ-in-a-dish models by inducing both mouse and human myoblast durotaxis to stripes where they aligned, differentiated, and fused into patterned myotubes...
May 11, 2017: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/28495195/in-vitro-repellency-of-deet-and-%C3%AE-citronellol-against-the-ticks-rhipicephalus-sanguineus-sensu-lato-and-amblyomma-sculptum
#11
Lorena Lopes Ferreira, Jaires Gomes de Oliveira Filho, Gabriel Moura Mascarin, Adalberto A Pérez de León, Lígia Miranda Ferreira Borges
Rhipicephalus sanguineus sensu lato and Amblyomma sculptum can parasite humans and domestic animals and are vectors of pathogens, including zoonoses. Repellents are an important tool of tick control. This study aimed to compare the efficacy of N,N-diethyl- 3-methylbenzamide (DEET), a standard repellent, versus β-citronellol in a Petri dish bioassay. A semicircle of filter paper (31.8cm(2)) was treated with 87μl of one of four concentrations (0.200, 0.100, 0.050 and 0.025mg/cm(2)) of β-citronellol, DEET or solvent (ethanol)...
May 30, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28492348/culture-of-human-cells-in-experimental-units-for-spaceflight-impacts-on-their-behavior
#12
Alessandra Cazzaniga, Claudia Moscheni, Jeanette Am Maier, Sara Castiglioni
Because space missions produce pathophysiological alterations such as cardiovascular disorders and bone demineralization which are very common on Earth, biomedical research in space is a frontier that holds important promises not only to counterbalance space-associated disorders in astronauts but also to ameliorate the health of Earth-bound population. Experiments in space are complex to design. Cells must be cultured in closed cell culture systems (from now defined experimental units (EUs)), which are biocompatible, functional, safe to minimize any potential hazard to the crew, and with a high degree of automation...
May 2017: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28488717/endothelial-monolayer-permeability-under-controlled-oxygen-tension
#13
Kenichi Funamoto, Daisuke Yoshino, Kento Matsubara, Ioannis K Zervantonakis, Kiyoe Funamoto, Masafumi Nakayama, Jun Masamune, Yoshitaka Kimura, Roger D Kamm
Endothelial permeability has been extensively investigated in the context of pathologies such as cancer and also in studies of drug delivery from the circulation. Hypoxia is a critical regulator of endothelial cell (EC) behavior and affects the barrier function of endothelial linings, yet its role has been little studied. This paper reveals the effect of hypoxia on the permeability of an EC monolayer by cellular experiments using a microfluidic device and a conventional cell culture dish. Human umbilical vein endothelial cells (HUVECs) were seeded into one microfluidic channel, creating an EC monolayer on each vertical surface of a collagen gel confined to a central chamber...
May 10, 2017: Integrative Biology: Quantitative Biosciences From Nano to Macro
https://www.readbyqxmd.com/read/28486010/lymphatic-endothelial-cells-under-mechanical-stress-altered-expression-of-inflammatory-cytokines-and-fibrosis
#14
Sheri Wang, Daibang Nie, J Peter Rubin, Lauren Kokai
BACKGROUND: Secondary lymphedema, resulting from damage to lymphatic vessels, is a common sequela following surgical removal of lymph nodes for cancer. Current therapeutics for treating lymphedema are limited and further research on underlying causes is warranted. Published studies on molecular mechanisms of lymphedema primarily focus on lymphatic endothelial cells (LECs), which comprise the innermost lining of lymphatic capillaries and collecting vessels. However, traditional static culture of LECs may not adequately recapitulate the lymphedemous cell phenotype as transcriptomal comparison of human dermal LECs has shown significant differences in ex vivo and in vitro LEC gene expression...
May 9, 2017: Lymphatic Research and Biology
https://www.readbyqxmd.com/read/28485048/cyclohexylamine-inexplicably-induces-antennae-loss-in-formosan-subterranean-termites-coptotermes-formosanus-shiraki-cyclohexylamine-hydrogen-phosphate-salts-are-novel-termiticides
#15
Brantley Grimball, Lucas Veillon, Tara Calhoun, Frank R Fronczek, Emily Arceneaux, Roger A Laine
BACKGROUND: In experiments with Formosan Subterranean Termites (Coptotermes formosanus Shirakii), myo-inositol-2-monophosphate as the di-cyclohexylammonium salt was tested among other sugar derivatives, and was found to be toxic to C. formosanus when added to a moistened filter paper food source in plastic petri dishes. RESULTS: Curiously, over a 9 day period, the moniliform (beaded) antennae of C. formosanus deteriorated in a stepwise fashion with the most distal pseudosegment (bead) turning brown and falling off, followed by the penultimate pseudosegment, sequentially until 7-9 days when only a stub of the antennae remained...
May 9, 2017: Pest Management Science
https://www.readbyqxmd.com/read/28484455/real-time-characterization-of-antibody-binding-to-receptors-on-living-immune-cells
#16
Sina Bondza, Eleanor Foy, Jonathan Brooks, Karl Andersson, James Robinson, Pascale Richalet, Jos Buijs
Understanding molecular interactions on immune cells is crucial for drug development to treat cancer and autoimmune diseases. When characterizing molecular interactions, the use of a relevant living model system is important, as processes such as receptor oligomerization and clustering can influence binding patterns. We developed a protocol to enable time-resolved analysis of ligand binding to receptors on living suspension cells. Different suspension cell lines and weakly adhering cells were tethered to Petri dishes with the help of a biomolecular anchor molecule, and antibody binding was analyzed using LigandTracer...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28484208/an-injectable-non-cross-linked-hyaluronic-acid-gel-containing-therapeutic-spheroids-of-human-adipose-derived-stem-cells
#17
Jingwei Feng, Kazuhide Mineda, Szu-Hsien Wu, Takanobu Mashiko, Kentaro Doi, Shinichiro Kuno, Kahori Kinoshita, Koji Kanayama, Rintaro Asahi, Ataru Sunaga, Kotaro Yoshimura
For chronic wounds, the delivery of stem cells in spheroidal structures can enhance graft survival and stem cell potency. We describe an easy method for the 3D culture of adipose-derived stem/stromal cells (ASCs) to prepare a ready-to-use injectable. We transferred suspensions of monolayer-cultured ASCs to a syringe containing hyaluronic acid (HA) gel, and then incubated the syringe as a 3D culture vessel. Spheroids of cells formed after 12 h. We found that 6 × 10(6) ASCs/ml in 3% HA gel achieved the highest spheroid density with appropriate spheroid sizes (20-100 µm)...
May 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28480301/vectofusin-1-promotes-rd114-tr-pseudotyped-lentiviral-vector-transduction-of-human-hspcs-and-t-lymphocytes
#18
Claudia Piovan, Virna Marin, Cinzia Scavullo, Stefano Corna, Erica Giuliani, Sergio Bossi, Anne Galy, David Fenard, Claudio Bordignon, Gian Paolo Rizzardi, Chiara Bovolenta
Ex vivo transduction of human CD34(+) hematopoietic stem/progenitor cells (hCD34(+) HSPCs) and T lymphocytes is a key process that requires high efficiency and low toxicity to achieve effective clinical results. So far, several enhancers have been used to improve this process. Among them, Retronectin highly meliorates VSV-G and RD114-TR pseudotyped lentiviral vector delivery in hCD34(+) HSPCs and T lymphocytes. However, Retronectin is expensive and requires pre-coating of culture dishes or bags before cell seeding, resulting in a cumbersome procedure...
June 16, 2017: Molecular Therapy. Methods & Clinical Development
https://www.readbyqxmd.com/read/28476340/first-report-of-human-intestinal-sarcocystosis-in-cambodia
#19
Virak Khieu, Hanspeter Marti, Saomony Chhay, Meng Chuor Char, Sinuon Muth, Peter Odermatt
Human intestinal sarcocystosis (HIS), caused by Sarcocystis species, is acquired by eating undercooked meat from sarcocyst-containing cattle (S. hominis, S. heydorni) and pigs (S. suihominis). We report on the detection of human intestinal Sarcocystis infections in a cross-sectional survey of Strongyloides stercoralis in early 2014, in Rovieng District, Preah Vihear Province, northern Cambodia. Among 1081 participants, 108 (10.0%) were diagnosed with Sarcocystis spp. oocysts in stool samples. Males had a significantly higher risk of infection than females (OR: 1...
May 2, 2017: Parasitology International
https://www.readbyqxmd.com/read/28476114/restaurant-based-intervention-to-facilitate-healthy-eating-choices-and-the-identification-of-allergenic-foods-at-a-family-oriented-resort-and-a-campground
#20
Lucia Tarro, Magaly Aceves-Martins, Yolanda Tiñena, Joan Lluís Parisi, Xavier Blasi, Montse Giralt, Elisabet Llauradó, Rosa Solà
BACKGROUND: Restaurant-based interventions can be an enjoyable way to encourage healthier eating choices by all members of a family. Thus, the principal aims of this study were a) to promote healthy diets by increasing healthy food offerings and b) to increase the number of foods offered specifically as gluten-free and lactose-free and to inform patrons by including nutritional and allergen information that complies with Regulation 1169/2011 regarding the food served in restaurants, takeaways and snack bars...
May 5, 2017: BMC Public Health
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