90 research outputs found
Genesis and Prospecting Potential of the Da’anhe Skarn Au Deposit in the Central of the Lesser Xing’an Range, NE China: Evidence from Skarn Mineralogy, Fluid Inclusions and H-O Isotopes
No full textSkarn Au deposits exist in the circum-pacific metallogenic belt. Interestingly, the Da’anhe Au deposit is the only independent skarn gold deposit in the Lesser Xing’an Range. To determine the metallogenic mechanism and prospecting potential of the Da’anhe deposit, we performed skarn mineralogy, fluid inclusion (FI) and H-O isotope analyses. The results show the following: (1) The Da’anhe deposit is a calcareous reduced skarn Au deposit that formed between an Early Jurassic gabbroic diorite and the Permian Tumenling Formation marble. Its metallogenic process includes five stages: the early skarn stage (Stage I1), late skarn stage (Stage I2), early quartz-sulfide stage (Stage II1), late quartz-sulfide stage (Stage II2) and quartz-carbonate stage (Stage II3). Gold precipitated in Stage II1 and Stage II2. (2) The initial ore-forming fluid was derived from magmatic water and featured a high temperature and intermediate to high salinity. After boiling and mixing, the fluid eventually changed to a low-temperature and low-salinity reducing fluid dominated by meteoric water. (3) The formation depth of the Au orebodies was 2.27–3.11 km, and the orebodies were later lifted to the surface (<500 m). The potential for finding skarn Au deposits in the study area is limited. (4) The distinctive nature of the ore-related magma (i.e., source, reducing conditions and high water content) was key to the formation of the Da’anhe skarn gold deposit
Biomacromolecules based core/shell architecture toward biomedical applications
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Polyelectrolyte multilayer capsules have become a novel and promising class of hybrid materials with great potential since they can be applied in various areas, such as pharmaceutical sciences, biotechnology, and biomedicine. The concept of using such carriers for biology application is diagnosis and treatment of diseases for convenience, safety and specific targeting. Therefore, the development of biocompatible, biodegradable and specific characteristic nanostructure material is highly desirable. Much effort has been devoted to exploring innovative and effective techniques to fabricate such materials. Among the available techniques, layer-by-layer (LbL) assembly capsules have attracted considerable attention attributing to the flexibly controlled size, shape, composition, wall thickness and functions. Protein, as the large class of biomacromolecules, was incorporated into capsules for improving the biocompatibility and specific function. In this review we provide an overview of the recent progress in biomacromolecular capsules or core/shell architecture with different diameters for the variety of purposes. The size ranging from micro-, sub-micro to nano scale based on the choice of the template. Their advantages are discussed here. The applications of these biomacromolecular capsules in biotechnological fields have also been summarized, for instance blood substitute, ATP carriers, photodynamic therapy and nanomedicines. (C) 2016 Elsevier B.V. All rights reserved.</p
Preparation of multicompartment silica-gelatin nanoparticles with self-decomposability as drug containers for cancer therapy in vitro
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We demonstrate multicompartment silica-gelatin nanoparticles (MSGNs), using gelatin doped CaCO3 particles as templates, with self-decomposability in response to body temperature as drug carriers for cancer therapy in vitro. The use of CaCO3 particles provides facile size control of MSGNs in nanoscale without using surfactants. Gelatin involved in the hybrid particles will cover the surface of particles, reducing the toxicity of silica materials caused by Si-OH groups, and moreover plays the role of the cement in the construction to hold the multicompartment structure. Above the gelation temperature, gelatin molecules can escape from particles resulting in the self-decomposition of MSGNs under body conditions. The obtained MSGNs have the potential to be used as an efficient carrier in cancer therapy.</p
Leptonetela digitata Lin & Li 2010
No full textLeptonetela digitata Lin & Li, 2010 Leptonetela digitata Lin & Li 2010: 24, figs 13–14, 61 Qianleptoneta triangula Chen et al. 2010: 2879, figs 3–4, 25B syn. nov. Type material examined. Leptonetela digitata: holotype: male (IZCAS), Xiniu Cave, Anhe Village, Dushan Town, Anlong County [25°17´N, 105°34´E], Guizhou, China, 8 May 2006, Y. Lin & Y. Tong leg. Paratype: 1 female, same data as holotype. Qianleptoneta triangula: paratypes: 1 male and 1 female (GIBGAS), Xiniu Cave [25°03´N, 105°29´E], Dushan Town, Anlong County, Guizhou, China, 20 May 2006, H. Chen leg. Distribution. China (Guizhou).Published as part of Wang, Chunxia & Li, Shuqiang, 2011, 2841, pp. 1-90 in Zootaxa 2841 on page
Draconarius spirallus Xu & Li 2007
No full text<i>Draconarius spirallus</i> Xu & Li, 2007 <p> <i>Draconarius spirallus</i> Xu & Li 2007: 347, figs 1, 7A–C</p> <p> <i>Draconarius grossus</i> Zhu & Chen 2009: 185, figs 3–4 <b>syn. n.</b></p> <p> <b>Material examined. China: Guizhou:</b> <i>Draconarius spirallus</i>: 1Ƥ, holotype (IZCAS), Anlong County, Dushan Town, Anhe Village, Xiniu Cave [25°19´N, 105°35´E], 10 May 2005, Yanfeng Tong leg. <b>Distribution.</b> China (Guizhou).</p> <p> <b>Remarks</b>. <i>Draconarius grossus</i> Zhu & Chen, 2009 and <i>D. spirallus</i> Xu & Li, 2007 were collected from the same cave. Based on the original descriptions and examination of the holotype of <i>D. spirallus</i>, they are similar in habitus and structure of the female genitalia (small epigynal teeth, widely separated from atrium; atrium small, situated posteriorly; copulatory ducts large, initially longated longitudinally then highly convoluted laterally; spermathecae global, widely separated from each other).</p>Published as part of <i>Wang, Xiaoxiao, Wu, San'An & Li, Shuqiang, 2012, Notes on two Draconarius species (Araneae, Agelenidae) from Guizhou, China, pp. 61-65 in Zootaxa 3302</i> on pages 64-65, DOI: <a href="http://zenodo.org/record/280941">10.5281/zenodo.280941</a>
Thermolysin-triggered short peptides self-assembly in confined space and application in cell culturing
No full textMolecules self-assembly in confined space such as in cell to form microfilaments is a crucial process to achieve special functionality. Herein, short peptides with different sequences were taken as examples to explore their self-assembly behavior in AAO templates which offer different pore size and depth to mimic confined environment. Thermolysin, as a mild, selective and effective biological enzyme, is applied here to trigger the self-assembly of short peptides in the pores of AAO template. Experimental results indicate that the morphology, structure and orientation of short peptide fibers in the pores are significantly affected by pore size of AAO templates. Moreover, the formed short peptide fibers in pores show obvious influence on the cell morphology and spreading. The method proposed here gives a feasible avenue to reveal the effect of confined environment on self-assembly behavior of short peptide
Multifunctional silver film with superhydrophobic and antibacterial properties
No full textMaterial properties are strongly dependent on material structure. The large diversity and complexity of material structures provide significant opportunities to improve the properties of the materials, expanding their applications. Here, we discuss the fabrication of a multifunctional silver film prepared by controlling the nucleation and growth of silver particles. Silver films with high hydrophobicity and antibacterial activity were fabricated by adopting an electrochemical approach. The dependence of the hydrophobic and antibacterial properties on the size and shape of the silver particles was first investigated. Small-sized silver particles exhibited a high antibacterial rate, while a porous silver film composed of dendritic particles showed a significant hydrophobic activity. By regulating the reaction time, current density, and silver salt concentration, a silver film with a contact angle of 150.9 degrees and an antibacterial rate of 54.7% was synthesized. This study demonstrates that finding a compromise between different material structures is a suitable way to fabricate multifunctional devices.</p
Insight into the efficiency of oxygen introduced photodynamic therapy (PDT) and deep PDT against cancers with various assembled nanocarriers
No full textmultifunctionalsilverfilmwithsuperhydrophobicandantibacterialproperties
No full textMaterial properties are strongly dependent on material structure. the large diversity and complexity of material structures provide significant opportunities to improve the properties of the materials, expanding their applications. here, we discuss the fabrication of a multifunctional silver film prepared by controlling the nucleation and growth of silver particles. silver films with high hydrophobicity and antibacterial activity were fabricated by adopting an electrochemical approach. the dependence of the hydrophobic and antibacterial properties on the size and shape of the silver particles was first investigated. small-sized silver particles exhibited a high antibacterial rate, while a porous silver film composed of dendritic particles showed a significant hydrophobic activity. by regulating the reaction time, current density, and silver salt concentration, a silver film with a contact angle of 150.9 degrees and an antibacterial rate of 54.7% was synthesized. this study demonstrates that finding a compromise between different material structures is a suitable way to fabricate multifunctional devices
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