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Seed science

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https://www.readbyqxmd.com/read/28623249/sequential-self-assembly-of-dna-functionalized-droplets
#1
Yin Zhang, Angus McMullen, Lea-Laetitia Pontani, Xiaojin He, Ruojie Sha, Nadrian C Seeman, Jasna Brujic, Paul M Chaikin
Complex structures and devices, both natural and manmade, are often constructed sequentially. From crystallization to embryogenesis, a nucleus or seed is formed and built upon. Sequential assembly allows for initiation, signaling, and logical programming, which are necessary for making enclosed, hierarchical structures. Although biology relies on such schemes, they have not been available in materials science. Here, we demonstrate programmed sequential self-assembly of DNA functionalized emulsions. The droplets are initially inert because the grafted DNA strands are pre-hybridized in pairs...
June 16, 2017: Nature Communications
https://www.readbyqxmd.com/read/28603037/species-boundaries-in-the-astragalus-cusickii-complex-delimited-using-molecular-phylogenetic-techniques
#2
J C Zimmers, M Thomas, L Yang, A Bombarely, M M Mancuso, M F Wojciechowski, J F Smith
Understanding the source of phenotypic variability is a challenge in the biological sciences. Variation in phenotypes is the result of variation in the genetics and environment the organism experiences, but elucidating the relative contribution of these two parameters can pose problems, especially in the field of systematics. Systematists are challenged to classify biological diversity into groups that share common ancestry. Phenotypic variation can be useful to demonstrate common ancestry, but only when the primary contributor to the variation is under strong genetic control, and thus heritable...
June 8, 2017: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/28560643/in-vitro-seed-germination-and-biochemical-profiling-of-artemisia-absinthium-exposed-to-various-metallic-nanoparticles
#3
Mubashir Hussain, Naveed Iqbal Raja, Zia-Ur-Rehman Mashwani, Muhammad Iqbal, Sidra Sabir, Farhat Yasmeen
In the recent years, nanotechnology has attained much attention in the every field of science. The synthesis, characterisation and applications of metallic nanoparticles (MNPs) have become an important branch of nanotechnology. In the current study, MNPs were synthesised through polyols process and applied in vitro to study their effect on medicinally important plant : Artemisia absinthium. The current study strives to check the effect of MNPs, i.e., Ag, Cu and Au on seed germination, root and shoot length, seedling vigour index (SVI) and biochemical profiling in A...
June 2017: 3 Biotech
https://www.readbyqxmd.com/read/28546559/mapping-few-femtosecond-slices-of-ultra-relativistic-electron-bunches
#4
Tim Plath, Christoph Lechner, Velizar Miltchev, Philipp Amstutz, Nagitha Ekanayake, Leslie Lamberto Lazzarino, Theophilos Maltezopoulos, Jörn Bödewadt, Tim Laarmann, Jörg Roßbach
Free-electron lasers are unique sources of intense and ultra-short x-ray pulses that led to major scientific breakthroughs across disciplines from matter to materials and life sciences. The essential element of these devices are micrometer-sized electron bunches with high peak currents, low energy spread, and low emittance. Advanced FEL concepts such as seeded amplifiers rely on the capability of analyzing and controlling the electron beam properties with few-femtosecond time resolution. One major challenge is to extract tomographic slice parameters instead of projected electron beam properties...
May 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28510186/broomcorn-and-foxtail-millet-were-cultivated-in-taiwan-about-5000%C3%A2-years-ago
#5
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/28507358/effect-of-citrullus-colocynthis-aqueous-seed-extract-on-beta-cell-regeneration-and-intra-islet-vasculature-in-alloxan-induced-diabetic-male-albino-rats
#6
Alia Amin, Mohammad Tahir, Khalid Pervez Lone
OBJECTIVE: To observe the effect of Citrullus colocynthis on beta cell regeneration and intra-islet vasculature. METHODS: This experimental study was conducted at the University of Health Sciences, Lahore, Pakistan, from February 2013 to January 2014. It comprised male wistar rats weighing 100-150gand aged 6-8 weeks. The animals were divided into 6 groups. Group A1 served as control. Diabetes was induced in groups A2, B2 and C2 using single intravenous injection of 50mg/kg of alloxan...
May 2017: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/28506900/chinese-materia-medica-used-in-medicinal-diets
#7
Fang Tan, Yalin Chen, Xiaolei Tan, Yunyun Ma, Yong Peng
ETHNOPHARMACOLOGICAL RELEVANCE: Medicinal diets have a history of more than 2000 years. Locally referred to as yaoshan (Chinese: ), a medicinal diet is understood in China as a dietary product that combines herbs and food with the purpose of preventing and treating diseases or improving health under the guidance of traditional Chinese medicine theory. Medicinal diets are used in Chinese people's daily life and in specialized restaurants. Hundreds of Chinese materia medica (CMM) are used in medicinal diets; however, a comprehensive evaluation of medicinal diets is lacking...
May 12, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28476982/effects-of-bimetallic-nanoparticles-on-seed-germination-frequency-and-biochemical-characterisation-of-eruca-sativa
#8
Mehreen Zaka, Bilal Haider Abbasi
In the modern era of science and technology, nanotechnology is becoming popular science field because materials at nanoscale contain improved physical, chemical and biological properties. This study aimed to explore the capacity of bimetallic nanoparticle alloys of silver (Ag), copper (Cu), gold (Au) in different ratios to evaluate the effects on medicinally important plant Eruca sativa. Biochemical parameters of Eruca sativa were studied by applying bimetallic alloy nanoparticles. Seeds of Eruca sativa were germinated on Murashige and Skoog medium with various combinations of nanoparticles suspension employed in concentration of (30 µg/ml)...
April 2017: IET Nanobiotechnology
https://www.readbyqxmd.com/read/28462457/how-lost-passenger-ants-find-their-way-home
#9
Mandyam V Srinivasan
Animal navigation has fascinated biologists and engineers for centuries, and some of the most illuminating discoveries have come from the study of creatures with a brain no larger than a sesame seed. In an elegant recent study, Pfeiffer and Wittlinger (Science, 353, 1155-1157, 2016) have shown the means by which desert ants, carried from one nest to another by a relative, find their own way back home if they are accidentally dropped en route.
May 1, 2017: Learning & Behavior
https://www.readbyqxmd.com/read/28444473/contrasting-effects-of-engineered-carbon-nanotubes-on-plants-a-review
#10
Meththika Vithanage, Mihiri Seneviratne, Mahtab Ahmad, Binoy Sarkar, Yong Sik Ok
Rapid surge of interest for carbon nanotube (CNT) in the last decade has made it an imperative member of nanomaterial family. Because of the distinctive physicochemical properties, CNTs are widely used in a number of scientific applications including plant sciences. This review mainly describes the role of CNT in plant sciences. Contradictory effects of CNT on plants physiology are reported. CNT can act as plant growth inducer causing enhanced plant dry biomass and root/shoot lengths. At the same time, CNT can cause negative effects on plants by forming reactive oxygen species in plant tissues, consequently leading to cell death...
April 25, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28421312/an-annotated-translation-of-no%C3%A3-l-bernard-s-1899-article-on-the-germination-of-neottia-nidus-avis
#11
Marc-André Selosse, Julita Minasiewicz, Bernard Boullard
We translate Noël Bernard's discovery of orchid symbiotic germination discovered on Neottia nidus-avis, as published in the May 1899 issue of the Comptes rendus hebdomadaires des séances de l'Académie des sciences. In his note, Bernard (1874-1911) establishes the need for a fungus, which is also forming mycorrhizae in adults, for seeds germination. We provide illustrations reproduced from his later works, and summaries of the French text he cited. In our annotations, we show how early this discovery was done in Bernard's career, and insist on the scientific framework at the end of the nineteenth century, where orchid germination was mysterious and the need for vicinity of parents was not fully understood...
April 18, 2017: Mycorrhiza
https://www.readbyqxmd.com/read/28412621/xanthium-strumarium-l-seed-hull-as-a-zero-cost-alternative-for-rhodamine-b-dye-removal
#12
Shraddha Khamparia, Dipika Kaur Jaspal
Treatment of polluted water has been considered as one of the most important aspects in environmental sciences. Present study explores the decolorization potential of a low cost natural adsorbent Xanthium strumarium L. seed hull for the adsorption of a toxic xanthene dye, Rhodamine B (RHB). The characterization of the adsorbent revealed the presence of high amount of carbon, when exposed to Electron Dispersive Spectroscopy (EDS). Further appreciable decolorization took place which was confirmed by Fourier Transform Infrared Spectroscopy (FTIR) analysis noticing shift in peaks...
April 13, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28391819/automatic-gender-determination-from-3d-digital-maxillary-tooth-plaster-models-based-on-the-random-forest-algorithm-and-discrete-cosine-transform
#13
Betül Akkoç, Ahmet Arslan, Hatice Kök
BACKGROUND AND OBJECTIVE: One of the first stages in the identification of an individual is gender determination. Through gender determination, the search spectrum can be reduced. In disasters such as accidents or fires, which can render identification somewhat difficult, durable teeth are an important source for identification. This study proposes a smart system that can automatically determine gender using 3D digital maxillary tooth plaster models. METHODS: The study group was composed of 40 Turkish individuals (20 female, 20 male) between the ages of 21 and 24...
May 2017: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/28382337/physiochemical-properties-of-greatly-enhanced-photoluminescence-of-aqueous-dispersible-upconversion-caf2-yb-er-nanoparticles
#14
Anees A Ansari, Ranvijay Yadav, S B Rai
Crystal phase morphological structure and optical properties of the as-prepared upconversion CaF2:Yb/Er(core) and sequential coating of an inert crystalline material and silica layers surrounding the seed core-nanoparticles (NPs) were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), selected area electron diffraction (SAED), optical absorption, FTIR spectroscopy and upconversion photoluminescence spectroscopy. Owing to the unique properties of CaF2 host matrix, we realized their practical applications in biomedical science to improve the upconversion luminescence property and aqueous dispersibility...
June 14, 2017: Photochemical & Photobiological Sciences
https://www.readbyqxmd.com/read/28379982/measuring-the-mass-volume-and-density-of-microgram-sized-objects-in-fluid
#15
Shirin Mesbah Oskui, Heran C Bhakta, Graciel Diamante, Huinan Liu, Daniel Schlenk, William H Grover
Measurements of an object's fundamental physical properties like mass, volume, and density can offer valuable insights into the composition and state of the object. However, many important biological samples reside in a liquid environment where it is difficult to accurately measure their physical properties. We show that by using a simple piece of glass tubing and some inexpensive off-the-shelf electronics, we can create a sensor that can measure the mass, volume, and density of microgram-sized biological samples in their native liquid environment...
2017: PloS One
https://www.readbyqxmd.com/read/28370177/blood-safety-implications-of-donors-using-hiv-pre-exposure-prophylaxis
#16
C R Seed, H Yang, J F Lee
HIV pre-exposure prophylaxis (PrEP) is the use of one or more antiretroviral medications (in combination) to prevent HIV infection. The most commonly used PrEP medication (Truvada(®) , Gilead Sciences, Inc.) acts by inhibiting HIV-1 reverse transcriptase. If someone who is using PrEP unknowingly becomes HIV infected (termed 'PrEP breakthrough infection'), there may be suppressed viral replication resulting in a virus level undetectable by the most sensitive HIV NAT. Failure to seroconvert and seroreversion (loss of previously detectable HIV antibodies) have also both been observed with 2nd, 3rd and 4th generation screening immunoassays, as well as Western blot assays...
March 31, 2017: Vox Sanguinis
https://www.readbyqxmd.com/read/28364714/enhancing-the-colloidal-stability-of-detonation-synthesized-diamond-particles-in-aqueous-solutions-by-adsorbing-organic-mono-bi-and-tridentate-molecules
#17
Tao Wang, Stephan Handschuh-Wang, Panpan Qin, Yang Yang, Xuechang Zhou, Yongbing Tang
Colloidal stability of nanoparticles with particle sizes smaller than 100nm is a critical issue for various research areas, including material science, electronics and biomedicine. We propose a facile, fast and cost-efficient method to increase the colloidal stability by simply adding organic molecules as ligands, which adsorb to the nanoparticle surface subsequently. Citric acid, oxalic acid, glutamic acid and propylamine were found to stabilize the nanodiamond (ND) particles with a mean diameter of approx...
March 25, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28336879/in-vitro-and-in-vivo-evaluation-of-a-three-dimensional-porous-multi-walled-carbon-nanotube-scaffold-for-bone-regeneration
#18
Manabu Tanaka, Yoshinori Sato, Mei Zhang, Hisao Haniu, Masanori Okamoto, Kaoru Aoki, Takashi Takizawa, Kazushige Yoshida, Atsushi Sobajima, Takayuki Kamanaka, Hiroyuki Kato, Naoto Saito
Carbon nanotubes (CNTs) have attracted a great deal of attention for the biological and medical science fields because of their characteristic physical and biological properties. In this study, we investigated the capacity of the 3D porous CNT scaffold (CNT porous block; CNTp) for bone regenerative medicine. Surface observations using a scanning electron microscope (SEM), crystal depositions on the surface of CNTps immersed in simulated body fluid (SBF), and evaluations of protein adsorption and controlled releasing were conducted to assess physical properties...
February 17, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28326228/innovations-from-the-ivory-tower-wilhelm-barthlott-and-the-paradigm-shift-in-surface-science
#19
Christoph Neinhuis
This article is mainly about borders that have tremendous influence on our daily life, although many of them exist and act mostly unrecognized. In this article the first objective will be to address more generally the relation between university and society or industry, borders within universities, borders in thinking and the huge amount of misunderstandings and losses resulting from these obvious or hidden borders. In the second part and in more detail, the article will highlight the impact of the research conducted by Wilhelm Barthlott throughout his scientific career during which not only one border was removed, shifted or became more penetrable...
2017: Beilstein Journal of Nanotechnology
https://www.readbyqxmd.com/read/28324955/identifying-important-regions-in-eeg-epilepsy-brain-networks
#20
Nantia D Iakovidou, Manolis Christodoulakis, Eleftherios S Papathanasiou, Savvas S Papacostas, Georgios D Mitsis
The human brain has been called the most complex object in the known universe and in many ways it constitutes the final frontier of science. Lately, the functional connectivity in human brain has been regarded and studied as a complex network using electroencephalography (EEG) signals. This means that the brain is studied as a connected system, where nodes represent different specialized brain regions and links or connections, represent communication pathways between the nodes. It is also fairly established that graph theory provides a variety of measures, methods and tools that can be useful to efficiently model, analyze and study an EEG network...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
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