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Search Results: 1 - 10 of 34160 matches for " Qing Su "
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Qing Su,Qing Zhao
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536811056327
Abstract: In the title compound, C17H18N2O, the dijedral angle between the mean planes of the pyridine and benzene rings is 78.0 (1)°. In the crystal, pairs of C—H...O interactions with graph-set motif R22(10) form inversion dimers. Adjacent dimers are further connected into a three-dimensional network by C—H...O connections. There is also an interaction between the carbonyl groups in adjacent molecules with an O...C distance of 3.176 (2) .
Pondering acupuncture treatment on anxiety disorders
SU Zhan-Qing
Zhong Xi Yi Jie He Xue Bao , 2004,
Abstract: Review of papers about acupuncture treatment on anxiety disorders since 1996 showed that many papers were mainly concerned with the treatment of anxiety disorders and obsession with electroacupuncture therapy. Baihui, Yintang, Shenmen, Dazhui, Taiyang,etc, were the most commonly involved acupoints. This paper argues that more emphasis should be transferred from "heart" to "brain", and correspondingly, should be put on acupoints at the head, the DU meridian and acupoints nearby in terms of the position of treatment, on scalp acupuncture and acupoint injection in terms of the methods of treatment, on the combination of diagnosis by western medicine and syndrome differentiation of traditional Chinese medicine in terms of treating strategy. As to the research method, evidence-based medicine, and multicenter, large sample randomized controlled trial study on anxiety disorders should be made.
Qi as a materialist concept on the level of medical philosophy
SU Zhan-Qing
Zhong Xi Yi Jie He Xue Bao , 2005,
Abstract: This paper has made a distinction between the materialist concept of qi on the medical philosophical level and its substantial existence, and illustrated the materiality and multiplicity of qi. Materiality refers to the objective reality, a summation of various things or phenomena related to humanbeings; while multiplicity refers to diversity of specific substances, each holding its individual essence. Based on two essential conceptions “xiang” and “xiangji”, and combining the theories of traditional Chinese medicine and Western medicine, this paper has also made a preliminary study on the substantial existence of qi at macro- and micro-levels, and on physiological (normal) and pathological (abnormal) aspects. It is the author’s argument that studies of the substantial existence of qi from different aspects, micro-dimension in particular, will push the syndrome differentiation of traditional Chinese medicine to a more subtle sphere.
Su-Qing LIU
动物学研究 , 2015,
Su-Qing LIU
动物学研究 , 2015,
Isolation and Characterization of Pepsin-Solubilized Collagen from the Skin of Black Carp (Mylopharyngdon piceus)  [PDF]
Guo Ping Wu, Xiao Ming Wang, Li Ping Lin, Su Hua Chen, Qing Qing Wu
Advances in Bioscience and Biotechnology (ABB) , 2014, DOI: 10.4236/abb.2014.57076

To make more effective use of underutilized resources, pepsin-solubilized collagen (PSC) was successfully extracted from the skin of black carp (Mylopharyngdon piceus) with a yield of 45.7% based on dry weight. The PSC comprising two identical α1-chains and one α2-chain with no disulfide bond was characterized as type I, and it contained 195 imino acid residues vs. 1000 amino acid residues. The collagen showed an absorption edge around 218 nm, which was lower than the maximum absorption wavelength of other PSC. The denaturation temperature of PSC was 25.6°C, which was lower than that of porcine collagen by approximately 11°C. The isoelectric point (pI) was estimated to be 8.23, and the collagen was soluble at an acidic pH as well as below 40 g/L NaCl. It is thought that the high yield and stability of PSC from the skin of black carp warrant its application as a new source of collagen for industrial purposes.

Structures, Electronic Properties, Spectroscopies and Hexagonal Monolayer Phase of a Family of Unconventional Fullerenes C64X4 (X = H; F;Cl;Br)
Qing-Bo Yan,Qing-Rong Zheng,Gang Su
Physics , 2008,
Abstract: A systematic first-principles study within density functional theory on the geometrical structures and electronic properties of unconventional fullerene C64 and its derivatives C64X4 (X = H; F;Cl;Br) has been performed. By searching through all 3465 isomers of C64, the ground state of C64 is found to be spherical shape with D2 symmetry, which differs from the parent cage of the recently synthesized C64H4 that is pear-shaped with C3v symmetry. We found that the addition of the halogen atoms like F;Cl;Br to the pentagon-pentagon fusion vertex of C64 cage could enhance the stability, forming the unconventional fullerenes C64X4. The Mulliken charge populations, LUMO-HOMO gap energies and density of states are calculated, showing that different halogen atoms added to C64 will cause remarkably different charge populations of the C64X4 molecule; the chemical deriving could enlarge the energy gaps and affect the electronic structures distinctly. It is unveiled that C64F4 is even more stable than C64H4, as the C-X bond energy of the former is higher than that of the latter. The computed spectra of C64H4 molecules agree well with the experimental data; the IR, Raman, NMR spectra of C64X4 (X = F;Cl;Br) are also calculated to stimulate further experimental investigations. Finally, it is uncovered by total energy calculations that C64X4 could form a stable hexagonal monolayer.
Face-Centered-Cubic B$_{80}$ Metal: Density functional theory calculations
Qing-Bo Yan,Qing-Rong Zheng,Gang Su
Physics , 2008, DOI: 10.1103/PhysRevB.77.224106
Abstract: By means of ab initio calculations within the density functional theory, we have found that B80 fullerenes can condense to form stable face-centered-cubic fcc solids. It is shown that when forming a crystal, B80 cages are geometrically distorted, the Ih symmetry is lowered to Th, and four boron-boron chemical bonds are formed between every two nearest neighbor B80 cages. The cohesive energy of B80 fcc solid is 0.23 eV/atom with respect to the isolated B80 fullerene. The calculated electronic structure reveals that the fcc B80 solid is a metal. The predicted solid phase would constitute a form of pure boron and might have diverse implications. In addition, a simple electron counting rule is proposed, which could explain the stability of B80 fullerene and the recently predicted stable boron sheet.
Crystalline and Electronic Structures of Molecular Solid C$_{50}$Cl$% _{10}$: First-Principles Calculation
Qing-Bo Yan,Qing-Rong Zheng,Gang Su
Physics , 2005, DOI: 10.1103/PhysRevB.73.165417
Abstract: A molecular solid C$_{50}$Cl$_{10}$ with possible crystalline structures, including the hexagonal-close-packed (hcp) phase, the face-centered cubic (fcc) phase, and a hexagonal monolayer, is predicted in terms of first-principles calculation within the density functional theory. The stable structures are determined from the total-energy calculations, where the hcp phase is uncovered more stable than the fcc phase and the hexagonal monolayer in energy per molecule. The energy bands and density of states for hcp and fcc C$_{50}$Cl$_{10}$ are presented. The results show that C$_{50}$Cl% $_{10}$ molecules can form either a hcp or fcc indirect-gap band insulator or an insulating hexagonal monolayer.
Seasonal Dynamics of Nutrient Loading and Chlorophyll A in a Northern Prairies Reservoir, Saskatchewan, Canada  [PDF]
Markus Hecker, Jong Seong Khim, John P. Giesy, Su-Qing Li, Joo-Hyung Ryu
Journal of Water Resource and Protection (JWARP) , 2012, DOI: 10.4236/jwarp.2012.44021
Abstract: Harmful algae blooms have become an increasing concern in context with the safety of water resources around the globe; however, little is known about the dynamics and specific causes of such blooms in the prairie ecozone in North America. The aim of this study was to research the nitrogen (N) and phosphorous (P) content and nutrient limitation (defined as N and P limitation) of growth of cyanobacteria in a northern prairies reservoir (Lake Diefenbaker [LD], SK, Canada). A combination of concentration balance analysis for N and P, controlled bioassays with the natural consortium of phytoplankton or defined monocultures of cyanobacteria, and satellite imagery was applied to address this aim. The current trophic status of Lake Diefenbaker is one of moderate eutrophication. Primary production in the lake is P-limited, and N did not represent a limiting factor for algal production. There was no significant increase in TP con- centrations between the upper and lower portions of the reservoir, indicating that most of the phosphorus in LD comes from upstream sites in Alberta. Anabaena circinalis, a species that has the potential to seriously degrade lake ecosys- tems, was identified as the predominant cyanobacteria in LD. Together with the fact that TP influxes into the reservoir primarily originate from upstream sources, these results suggest the need for remedial measures in the upstream reach of the South Saskatchewan River. Satellite imaging represented a promising approach in support of monitoring for po- tential algal blooms in LD; however, due to limited sensitivity and issues associated with atmosphere interference this methodology should only be used in combination with in situ water quality monitoring. In summary, while this study indicated that Lake Diefenbaker is potentially at risk with cyanobacteria blooms (some of which such as Anabena sp. that can produce toxins) during late summer and fall, development of clear causal relationships and risk assessment strategies is currently limited due to lack of monitoring data and programs.
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