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https://www.readbyqxmd.com/read/28532021/nanosecond-laser-ablation-enhances-cellular-infiltration-in-a-hybrid-tissue-scaffold
#1
S Jahnavi, N Arthi, S Pallavi, C Selvaraju, G S Bhuvaneshwar, T V Kumary, R S Verma
Hybrid tissue engineered (HTE) scaffolds constituting polymeric nanofibers and biological tissues have attractive bio-mechanical properties. However, they suffer from small pore size due to dense overlapping nanofibers resulting in poor cellular infiltration. In this study, using nanosecond (ns) laser, we fabricated micro-scale features on Polycaprolactone (PCL)-Chitosan (CH) nanofiber layered bovine pericardium based Bio-Hybrid scaffold to achieve enhanced cellular adhesion and infiltration. The laser energy parameters such as fluence of 25J/cm(2), 0...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28530346/-seeds-of-mindfulness-in-the-desert-preliminary-results-from-a-clinical-trial-in-the-mindfulness-clinic-mental-health-center-beer-sheva
#2
Lee Tibi Cohen, Keren Reiner Noy, Ayelet Shmulevich, Oded Arbel
INTRODUCTION: Mindfulness-based therapies are rooted in the Buddhist tradition, and promote cultivation of qualities such as open awareness, acceptance and compassion. While various studies have demonstrated the efficacy of integrating mindfulness in therapeutic practice for people suffering from clinical conditions such as depression and anxiety as well as the non-clinical population, this was rarely replicated in Israel. In the Mindfulness Clinic, located in the Mental Health Center, Beer Sheva, mindfulness workshops are now available for diverse populations dealing with various challenges such as daily stress, chronic pain, and depression...
December 2016: Harefuah
https://www.readbyqxmd.com/read/28530187/application-of-snps-to-improve-yield-of-pisum-sativum-l-pea
#3
Ansar Mehmood, Ghulam Murtaza
Nanotechnology opens an enormous scope of novel application in the fields of biotechnology and agricultural industries, because nanoparticles (NPs) have unique physicochemical properties, i.e. high surface area, high reactivity, tunable pore size and particle morphology. Present study was carried out to determine the role of silver NPs (SNPs) to improve yield of Pisum sativum L. SNPs (10-100 nm) were synthesised by green method using extract of Berberis lycium Royle. Pea seeds were soaked and seedling were foliage sprayed by 0, 30, 60 and 90 ppm SNPs...
June 2017: IET Nanobiotechnology
https://www.readbyqxmd.com/read/28530181/green-synthesis-of-cuo-nanoparticles-loaded-on-the-seashell-surface-using-rumex-crispus-seeds-extract-and-its-catalytic-applications-for-reduction-of-dyes
#4
Akbar Rostami-Vartooni
In this study, CuO nanoparticles supported on the seashell (CuO NPs/seashell) was prepared using Rumex crispus seeds extract as a chelating and capping agent. The prepared nanocomposite was characterised by Fourier transform infrared spectroscopy, X-ray diffraction, field emission scanning electron microscopy, energy-dispersive X-ray spectroscopy and transmission electron microscopy. The particle size of CuO NPs on the seashell sheets was in the range of 8-60 nm. Catalytic ability of CuO NPs/seashell was investigated for the reduction of 4-nitrophenol (4-NP) and Congo red (CR)...
June 2017: IET Nanobiotechnology
https://www.readbyqxmd.com/read/28522006/the-influence-of-solvent-formulations-on-thermosensitive-hydroxybutyl-chitosan-hydrogel-as-a-potential-delivery-matrix-for-cell-therapy
#5
Zixian Bao, Changqing Jiang, Zhiguo Wang, Qiuxia Ji, Guohui Sun, Shichao Bi, Ya Liu, Xiguang Chen
Many cell delivery matrices have been developed due to the low transplantation efficiency of cell therapy. In the present study, thermosensitive hydroxybutyl chitosan (HBC) hydrogels were prepared with different formulations' solvent (Dulbecco's modified eagle's medium/phosphate buffered saline [DMEM/PBS], 0:100, 30:70, 50:50, 70:30, 100:0 [v/v]). Their gelation temperature was raised with DMEM ratio increase (from 9.5°C to 20.9°C). Pore sizes of HBC hydrogels treated with high ionic strength solutions became smaller...
August 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28518068/3d-magnetic-stem-cell-aggregation-and-bioreactor-maturation-for-cartilage-regeneration
#6
Aurore Van de Walle, Claire Wilhelm, Nathalie Luciani
Cartilage engineering remains a challenge due to the difficulties in creating an in vitro functional implant similar to the native tissue. An approach recently explored for the development of autologous replacements involves the differentiation of stem cells into chondrocytes. To initiate this chondrogenesis, a degree of compaction of the stem cells is required; hence, we demonstrated the feasibility of magnetically condensing cells, both within thick scaffolds and scaffold-free, using miniaturized magnetic field sources as cell attractors...
April 27, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28517023/shifts-in-water-availability-mediate-plant-pollinator-interactions
#7
M Kate Gallagher, Diane R Campbell
Altered precipitation patterns associated with anthropogenic climate change are expected to have many effects on plants and insect pollinators, but it is unknown if effects on pollination are mediated by changes in water availability. We tested the hypothesis that impacts of climate on plant-pollinator interactions operate through changes in water availability, and specifically that such effects occur through alteration of floral attractants. We manipulated water availability in two naturally occurring Mertensia ciliata (Boraginaceae) populations using water addition, water reduction and control plots and measured effects on vegetative and floral traits, pollinator visitation and seed set...
May 18, 2017: New Phytologist
https://www.readbyqxmd.com/read/28514596/unravelling-the-growth-mechanism-of-silica-particles-in-st%C3%A3-ber-method-in-situ-seeded-growth-model
#8
Yandong Han, Ziyang Lu, Zhaogang Teng, Jinglun Liang, Zilong Guo, Dayang Wang, Ming-Yong Han, Wensheng Yang
In this work, we investigated the kinetic balance between ammonia-catalyzed hydrolysis of tetraethyl orthosilicate (TEOS) and subsequent condensation over the growth of silica particles in the Stöber method. Our results reveal that at the initial stage, the reaction is dictated by TEOS hydrolysis to form silanol monomers, which is denoted as Pathway I and responsible for nucleation and growth of small silica particles via condensation of neighboring silanol monomers and siloxane network clusters derived thereafter...
May 17, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28514135/three-dimensional-hetero-integration-of-faceted-gan-on-si-pillars-for-efficient-light-energy-conversion-devices
#9
Dong Rip Kim, Chi Hwan Lee, In Sun Cho, Hanmin Jang, Min Soo Jeon, Xiaolin Zheng
An important pathway for cost-effective light energy conversion devices, such as solar cells and light emitting diodes, is to integrate III-V (e.g., GaN) materials on Si substrates. Such integration first necessitates growth of high crystalline III-V materials on Si, which has been the focus of many studies. However, the integration also requires that the final III-V/Si structure has a high light energy conversion efficiency. To accomplish these twin goals, we use single-crystalline microsized Si pillars as a seed layer to first grow faceted Si structures, which are then used for the heteroepitaxial growth of faceted GaN films...
May 22, 2017: ACS Nano
https://www.readbyqxmd.com/read/28513707/systematic-study-of-interdependent-relationship-on-gold-nanorod-synthesis-assisted-by-electron-microscopy-image-analysis
#10
Seokyoung Yoon, Byoungsang Lee, Jaesub Yun, Jeon Geon Han, Jong-Seok Lee, Jung Heon Lee
Here, we systematically investigated the independent, multiple, and synergic effects of three major components, namely, ascorbic acid (AA), seed, and silver ions (Ag(+)), on the characteristics of gold nanorods (GNRs), i.e., longitudinal localized surface plasmon resonance (LSPR) peak position, shape, size, and monodispersity. To quantitatively assess the shape and dimensions of GNRs, we used an automated transmission electron microscopy image analysis method using a MATLAB-based code developed in-house and the concept of solidity, which is the ratio between the area of a GNR and the area of its convex hull...
May 17, 2017: Nanoscale
https://www.readbyqxmd.com/read/28513141/application-of-cu3insnse5-heteronanostructures-as-counter-electrodes-for-dye-sensitized-solar-cells
#11
Yue Lou, Wenjie Zhao, Chunguang Li, He Huang, Tianyu Bai, Cailing Chen, Chen Liang, Zhan Shi, Dong Zhang, Xiao-Bo Chen, Shouhua Feng
In this research, we reported the synthesis of quaternary Cu3InSnSe5 nanoparticles with uniform size distribution and morphology for the first time through delicate controls over the chemical reaction kinetics. On the basis of the preparation strategy of Cu3InSnSe5 nanoparticles, Pt-Cu3InSnSe5 and Au-Cu3InSnSe5 heteronanostructures were designed and yielded using a simple and efficient seed growth method. These two heteronanostructures remained monodispersed without presence of any Cu3InSnSe5 nanocrystal impurities...
May 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28511648/a-mathematical-model-of-mechanotransduction-reveals-how-mechanical-memory-regulates-mesenchymal-stem-cell-fate-decisions
#12
Tao Peng, Linan Liu, Adam L MacLean, Chi Wut Wong, Weian Zhao, Qing Nie
BACKGROUND: Mechanical and biophysical properties of the cellular microenvironment regulate cell fate decisions. Mesenchymal stem cell (MSC) fate is influenced by past mechanical dosing (memory), but the mechanisms underlying this process have not yet been well defined. We have yet to understand how memory affects specific cell fate decisions, such as the differentiation of MSCs into neurons, adipocytes, myocytes, and osteoblasts. RESULTS: We study a minimal gene regulatory network permissive of multi-lineage MSC differentiation into four cell fates...
May 16, 2017: BMC Systems Biology
https://www.readbyqxmd.com/read/28510186/broomcorn-and-foxtail-millet-were-cultivated-in-taiwan-about-5000%C3%A2-years-ago
#13
Chen-Hwa Tsang, Kuang-Ti Li, Tze-Fu Hsu, Yuan-Ching Tsai, Po-Hsuan Fang, Yue-Ie Caroline Hsing
BACKGROUND: Archaeobotanical remains of millet were found at the Nan-kuan-li East site in Tainan Science Park, southern Taiwan. This site, dated around 5000-4300 BP, is characterized by remains of the Tapenkeng culture, the earliest Neolithic culture found so far in Taiwan. A large number of millet-like carbonized and charred seeds with varied sizes and shapes were unearthed from the site by the flotation method. Since no millet grain was ever found archaeologically in Taiwan previously, this discovery is of great importance and significance...
December 2017: Botanical Studies (Taipei, Taiwan)
https://www.readbyqxmd.com/read/28510185/morphological-physiological-cytological-and-phytochemical-studies-in-diploid-and-colchicine-induced-tetraploid-plants-of-fagopyrum-tataricum-l-gaertn
#14
Lin-Jiao Wang, Mao-Yin Sheng, Pei-Cai Wen, Jia-Ying Du
BACKGROUND: Tartary buckwheat are very popular as an important functional food material and its cultivation is very widespread in our whole world, but there obviously lack works in the researches of genetic breeding for agricultural and medicinal utilization. The aim of this study is to obtain good germplasm resources for agricultural and medicinal use of tartary buckwheat (Fagopyrum tataricum) by inducing the tetraploid plants. RESULTS: Four cultivars of F. tataricum, that is, Qianwei 2#, Jinku 2#, Chuanqiao 1#, and Liuqiao 1# were selected to experiment...
December 2017: Botanical Studies (Taipei, Taiwan)
https://www.readbyqxmd.com/read/28507292/growth-properties-and-theoretical-analysis-of-m2livo4-m%C3%A2-%C3%A2-rb-cs-crystals-two-potential-mid-infrared-nonlinear-optical-materials
#15
Guopeng Han, Ying Wang, Xin Su, Zhihua Yang, Shilie Pan
Mid-Infrared nonlinear optical (Mid-IR NLO) crystals with excellent performances play a particularly important role for applications in areas such as telecommunications, laser guidance, and explosives detection. However, the design and growth of high performance Mid-IR NLO crystals with large NLO efficiency and high laser-damage threshold (LDT) still face numerous fundamental challenge. In this study, two potential Mid-IR NLO materials, Rb2LiVO4 (RLVO) and Cs2LiVO4 (CLVO) with noncentrosymmetric structures (Orthorhombic, Cmc21) were synthesized by high-temperature solution method...
May 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28505724/critical-nucleus-size-for-crystallization-of-supercooled-liquids-in-two-dimensions
#16
Tomoko Mizuguchi, Yuki Higeta, Takashi Odagaki
Using molecular dynamics simulations, we study the crystallization of supercooled liquids in two dimensions in which particles interact with other particles via the Lennard-Jones-Gauss potential. We first prepare supercooled liquids at various temperatures by rapid quenching from the melt. The simulations are performed with a crystalline seed inserted at the center of the initial system. We investigate the time evolution of the inserted nucleus and its surroundings and determine the critical nucleus size n_{c} defined as the smallest nucleus which survives...
April 2017: Physical Review. E
https://www.readbyqxmd.com/read/28504874/cranioplasty-with-adipose-derived-stem-cells-beta-tricalcium-phosphate-granules-and-supporting-mesh-six-year-clinical-follow-up-results
#17
Tuomo Thesleff, Kai Lehtimäki, Tero Niskakangas, Sanna Huovinen, Bettina Mannerström, Susanna Miettinen, Riitta Seppänen-Kaijansinkko, Juha Öhman
Several alternative techniques exist to reconstruct skull defects. The complication rate of the cranioplasty procedure is high and the search for optimal materials and techniques continues. To report long-term results of patients who have received a cranioplasty using autologous adipose-derived stem cells (ASCs) seeded on beta-tricalcium phosphate (betaTCP) granules. Between 10/2008 and 3/2010, five cranioplasties were performed (four females, one male; average age 62.0 years) using ASCs, betaTCP granules and titanium or resorbable meshes...
May 15, 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28501158/poly-vinyl-alcohol-capped-silver-nanoparticles-for-antioxidant-assay-based-on-seed-mediated-nanoparticle-growth
#18
Saowapak Teerasong, Amornrassamee Jinnarak, Sumonmarn Chaneam, Prapin Wilairat, Duangjai Nacapricha
A simple and rapid method for measurement of total antioxidant capacity (TAC) was developed. In this work, gallic acid was used as the antioxidant standard. Poly(vinyl alcohol) embedded silver nanoparticles (PVA-AgNPs) were employed as a colorimetric sensor. The detection principle was based on the seed-mediated nanoparticle growth technique. The PVA-AgNPs act as a catalyst in the reduction of Ag(+) by gallic acid by providing nucleation seeds. Ag(+) was reduced to Ag° and accumulated on the PVA-AgNP surface, leading to an increase in the size of particles...
August 1, 2017: Talanta
https://www.readbyqxmd.com/read/28497169/homogeneous-pancreatic-cancer-spheroids-mimic-growth-pattern-of-circulating-tumor-cell-clusters-and-macrometastases-displaying-heterogeneity-and-crater-like-structure-on-inner-layer
#19
Hao Feng, Bao-Chi Ou, Jing-Kun Zhao, Shuai Yin, Ai-Guo Lu, Eva Oechsle, Wolfgang E Thasler
PURPOSE: Pancreatic cancer 3D in vitro models including multicellular tumor spheroid (MCTS), single cell-derived tumor spheroid (SCTS), tissue-derived tumor spheroid, and organotypic models provided powerful platforms to mimic in vivo tumor. Recent work supports that circulating tumor cell (CTC) clusters are more efficient in metastasis seeding than single CTCs. The purpose of this study is to establish 3D culture models which can mimic single CTC, monoclonal CTC clusters, and the expansion of macrometastases...
May 11, 2017: Journal of Cancer Research and Clinical Oncology
https://www.readbyqxmd.com/read/28497168/relationship-between-geographical-origin-seed-size-and-genetic-diversity-in-faba-bean-vicia-faba-l-as-revealed-by-ssr-markers
#20
Şurhan Göl, Sami Doğanlar, Anne Frary
Faba bean (Vicia faba L.) is an important legume species because of its high protein and starch content. Broad bean can be grown in different climatic conditions and is an ideal rotation crop because of the nitrogen fixing bacteria in its roots. In this work, 255 faba bean germplasm accessions were characterized using 32 SSR primers which yielded 302 polymorphic fragments. According to the results, faba bean individuals were divided into two main groups based on the neighbor-joining algorithm (r = 0.91) with some clustering based on geographical origin as well as seed size...
May 11, 2017: Molecular Genetics and Genomics: MGG
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