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Lu D.,Central South University | He L.,Central South University | He L.,Changde Vocational College | Xiang W.,Central South University | And 9 more authors.
Anatomical Record | Year: 2013

The CA3 area serves a key relay on the tri-synaptic loop of the hippocampal formation which supports multiple forms of mnemonic processing, especially spatial learning and memory. To date, morphometric data about human CA3 pyramidal neurons are relatively rare, with little information available for their pre- and postnatal development. Herein, we report a set of developmental trajectory data, including somal growth, dendritic elongation and branching, and spine formation, of human CA3 pyramidal neurons from midgestation stage to middle childhood. Golgi-impregnated CA3 pyramidal neurons in fetuses at 19, 20, 26, 35, and 38 weeks of gestation (GW) and a child at 8 years of age (Y) were analyzed by Neurolucida morphometry. Somal size of the impregnated CA3 cells increased age-dependently among the cases. The length of the apical and basal dendrites of these neurons increased between 26 GW to 38 GW, and appeared to remain stable afterward until 8 Y. Dendritic branching points increased from 26 GW to 38 GW, with that on the apical dendrites slightly reduced at 8 Y. Spine density on the apical and basal dendrites increased progressively from 26 GW to 8 Y. These data suggest that somal growth and dendritic arborization of human CA3 pyramidal neurons occur largely during the second to third trimester. Spine development and likely synaptogenesis on CA3 pyramidal cells progress during the third prenatal trimester and may continue throughout childhood. © 2012 Wiley Periodicals, Inc.


Qiang W.,Xiangtan Vocational and Technical College | Min Z.,Xiangtan Vocational and Technical College
Advance Journal of Food Science and Technology | Year: 2015

With the rapid growth in economy and the constant development in people living standard, packaging has become an indispensable part to human activities. However, the ways and materials popular used for packaging currently have been making a great deal of recourse waste and serious pollution to the environments. From the existing problems in food packaging, the study has put forward the necessity of green packaging under the idea of sustainable development and discussed the approach of green food packaging to environment protection. © Maxwell Scientific Organization, 2015.


Wang Q.,Xiangtan Vocational and Technical College | Zhou M.,Xiangtan Vocational and Technical College
Advanced Materials Research | Year: 2014

Web design is the new art design combined the art and technology, and Chinese ink painting is a traditional drawing with long history. With the rapid progress of globalization, web design complies with the western design principles with simple and standard designing styles. However, the wonderful works should both meet the world's design trends and inherit national culture. Integrated the traditional ink-and-wash features, the paper has analyzed the applicable ways of ink-and-wash with fine web design works and discussed how to create a good web design works in national and modern way. © (2014) Trans Tech Publications, Switzerland.


Luo R.,Xiangtan Vocational and Technical College | Luo R.,CentralSouth University | Mao D.,CentralSouth University | Shi C.,CentralSouth University
Petroleum Processing and Petrochemicals | Year: 2011

Tribological properties of nano-WS 2 particles in green lubricating oil, PAO-6 and rapeseed oil, were analyzed through a series of four-ball friction tests. Results show that adding nano-WS 2 particles into PAO-6 or rapeseed oil with an optimum dosage of 2% can significantly improve the extreme pressure antiwear and antifriction properties of the base oil. Furthermore, the excellent anti-wear and antifriction properties of lubricating oil having nano-W 2 particles could be maintained in a wider range of temperature, load and speed.


Luo R.,Xiangtan Vocational and Technical College | Luo R.,Central South University | Mao D.,Central South University | Shi C.,Central South University
Petroleum Processing and Petrochemicals | Year: 2011

Tribological properties of nano-WS 2 particles in green lubricating oil, PAO-6 and rapeseed oil, were analyzed through a series of four-ball friction tests. Results show that adding nano-WS 2 particles into PAO-6 or rapeseed oil with an optimum dosage of 2% can significantly improve the extreme pressure antiwear and antifriction properties of the base oil. Furthermore, the excellent anti-wear and antifriction properties of lubricating oil having nano-WS 2 particles could be maintained in a wider range of temperature, load and speed.


Liu C.,Central South University | Liu C.,The First Hospital of Changsha | Yang Y.,Central South University | Yang Y.,Xiangtan Vocational and Technical College | And 6 more authors.
Frontiers in Neuroanatomy | Year: 2015

In mammalian cerebrum there exist two distinct types of interneurons expressing nitric oxide synthase (NOS). Type I neurons are large in size and exhibit heavy nicotinamide adenine dinucleotide phosphate diaphorase (NADPH-d) histochemical reaction, while type II cells are small with light NADPH-d reactivity. The time of origin of these cortical neurons relative to corticogenesis remains largely unclear among mammals. Here we explored this issue in guinea pigs using cell birth-dating and double-labeling methods. Bromodeoxyuridine (BrdU) pulse-chasing (2 doses at 50 mg/kg, 12 h apart) was given to time-pregnant mothers, followed by quantification of NADPH-d/BrdU colocalization in the parietal and temporal neocortex in offspring at postnatal day 0 (P0), P30 and P60. Type I neurons were partially colabeled with BrdU at P0, P30 and P60 following pulse-chasing at embryonic day 21 (E21), E28 and E35, varied from 2-11.3% of total population of these neurons for the three time groups. Type II neurons were partially colabeled for BrdU following pulse-chasing at E21, E28, E35 and E42 at P0 (8.6%-16.5% of total population for individual time groups). At P60, type II neurons were found to co-express BrdU (4.8-11.3% of total population for individual time groups) following pulse-chasing at E21, E28, E35, E42, E49, E56 and E60/61. These results indicate that in guinea pigs type I neurons are generated during early corticogenesis, whereas type II cells are produced over a wide prenatal time window persisting until birth. The data also suggest that type II nitrinergic neurons may undergo a period of development/differentiation, for over 1 month, before being NADPH-d reactive. © 2015 Liu, Yang, Hu, Li, Zhang, Cai, Li and Yan.


Chen H.-X.,Hunan University | Li F.,Hunan University | Xiao J.-N.,Hunan University | Cao Z.-Z.,Hunan University | And 3 more authors.
Guangdianzi Jiguang/Journal of Optoelectronics Laser | Year: 2011

The direct-detection optical orthogonal frequency division multiplexing (O-OFDM) system with companding transform (CT) technique is investigated by simulation and experiment to reduce the peak-to-average power ratio (PAPR) of OFDM signals and improve the sensitivity of the receiver. The simulation results show that when increasing the companding coefficient μ, the PAPR of the OFDM signal decreases and the bit error rate (BER) of the system firstly decreases and then increases. We can choose a proper μ according to the PAPR and BER of the system. The experimented results confirm that the PAPR of the OFDM signal is decreased by 3 dB, and the receiver sensitivity is improved by 2.5 dB at BER of 10-4 after transmission over a 100-km single-mode fiber when μ is 2.


Yang J.,Central South University | Ren Y.,Xiangtan Vocational and Technical College | Liu M.,Central South University | Wang Q.,Central South University | Tang S.,Central South University
Journal of Central South University (Medical Sciences) | Year: 2014

Objective: To investigate the criterion-related validity of Menopause-Specific Quality of Life Questionnaire (MENQQL)-Chinese version and to evaluate the effect of menopausal symptoms on health related quality of life. Methods: This study was a cross-sectional survey. Three communities were randomly chosen in Changsha, and then 340 menopausal women aged 45-55 years were randomly chosen from the documented data of the 3 community health service centers. They were required to fill out 4 questionnaires: demographic questionnaire, MENQOL-Chinese version, Kupperman Index (KI) and World Health Organization Quality of Life (WHQOL)-BREF. Correlation analysis was used to measure the criterion-related validity. Results: MENQOL-Chinese version subscales (vasomotor, psycho-social, sexual and physical) and KI total score were positively correlated (r=0.800, 0.751, 0.607,0.906 respectively); while negatively correlated with WHOQOL-BREF total score (r =-0.694, -0.851, -0.585, -0.873 respectively); MENQOL-Chinese version subscales (vasomotor, psycho-social, sexual and physical) were significantly correlated with WHOQOL-BREF subscales (physical, psychological, social relationship, environment), and the physical domain was the highest among the correlation coefficients (r=-0.915). Conclusion: MENQOL-Chinese version shows relatively high criterion-related validity compared with KI and WHOQOL-BREF, which can be widely used to measure the quality of life of menopause women in China.


Yang Y.,Central South University | Yang Y.,Xiangtan Vocational and Technical College | Xie M.-X.,Central South University | Li J.-M.,Changsha Medical University | And 6 more authors.
Frontiers in Neuroanatomy | Year: 2015

Cells expressing doublecortin (DCX+) occur at cortical layer II, predominantly over the paleocortex in mice/rats, but also across the neocortex among larger mammals. Here, we explored the time of origin of these cells in neonatal and 2-month-old guinea pigs following prenatal BrdU pulse-chasing. In the neocortex, BrdU+ cells birth-dated at embryonic day 21 (E21), E28, and E35 laminated over the cortical plate with an inside-out order. In the piriform cortex, cells generated at E21 and E28 occurred with a greater density in layer II than III. Many cells were generated at later time points until birth, occurring in the cortex without a laminar preference. DCX+ cells in the neocortex and piriform cortex partially co-colocalized with BrdU (up to 7.5%) in the newborns after pulse-chasing from E21 to E49 and in the 2 month-old animals after pulse-chasing from E28 to E60/61, with higher rates seen among the E21-E35 groups. Together, layer II DCX+ cells in neonatal and young adult guinea pigs may be produced over a wide prenatal time window, but mainly during the early phases of corticogenesis. Our data also show an earlier establishment of the basic lamination in the piriform relative to neocortical areas in guinea pigs. © 2015 Yang, Xie, Li, Hu, Patrylo, Luo, Cai, Li and Yan.

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