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Field testing of earth pressures in a large-scale natural loess slope
Yang Kong,Huai-ning Ruan,Xue-feng Huang,Zhen-de Zhu 대한토목학회 2018 KSCE JOURNAL OF CIVIL ENGINEERING Vol.22 No.7
An in-situ large-scale earth pressure test was undertaken in a natural loess slope in Lanzhou, China. A 14.5-m-high natural slopewas gradually cut into a vertical slope through a series of eight slope cutting work conditions. By pre-installing re-bar meters andcutting slope unloading, the real earth pressure distribution law and potential slip surface development mechanism, along with thevariation of the Slope Cutting Depth (SCD), were obtained under the condition that each point in the free surface can moveindependently and freely. Earth pressure increases slowly at first and then decreases sharply along the Slope Excavating Depth(SED). The increase rate for 9.0 to 10.4 m is 3 to 4 times as much as the former conditions, so the self-stability height of the slope is9.0 to 10.4 m. The unsaturated natural loess shear outlet of the slope is always located at the H/3 (where H is the natural slope height)position, so the slip surface does not pass through the bottom of the slope. The measured values of unsaturated vertical slope earthpressures are far less than the values calculated by Rankine’s earth pressure theory – especially the size and position of the maximumearth pressure.
Xie, Xiu-Zhen,Song, Kun,Cui, Baoxia,Jiang, Jie,Zhang, You-Zhong,Wang, Bo,Yang, Xing-Sheng,Kong, Bei-Hua Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.11
Objective: The aim of this retrospective study is to analyze the clinical and pathological factors related to the prognosis of Chinese patients with stage Ib to IIb cervical cancer. Methods and Results: 13 clinical pathological factors in 255 patients with stage Ib to IIb cervical cancer undergoing radical hysterectomy and systematic lymphadenectomy were analyzed to screen for factors related to prognosis. The cumulative 5-year survival of the 255 patients was 75.7%. The result of the univariate analysis suggested that clinical stage, cell differentiation, depth of cervical stromal invasion, parametrial tissue involvement, and lymph node metastasis were prognostic factors for patients with stage Ib to IIb cervical cancer (P<0.05). Compared with cases with involvement of iliac nodes, obturator nodes, or inguinal lymph nodes, cases with metastasis to the common iliac lymph nodes had a poorer prognosis (P<0.05). Cases with involvement of four or more lymph nodes had a poorer prognosis than those with involvement of three or fewer lymph nodes (P<0.05). Using multivariate Cox proportional hazards model regression analysis, non-squamous histological type, poor differentiation, parametrial tissue involvement, and outer 1/3 stromal invasion were found to be independently related to patients poor prognosis (P<0.05). Conclusion: Non-squamous histological type, poor cell differentiation, parametrial tissue involvement, and outer 1/3 stromal invasion are the independent poor prognostic factors for patients with stage Ib to IIb cervical cancer.
A Simple Method for Cat Bone Marrow-derived Mesenchymal Stem Cell Harvesting
Jin, Guang-Zhen,Lee, Young-Soo,Choi, Eu-Gene,Cho, Kyu-Woan,Kong, Il-Keun 韓國受精卵移植學會 2008 한국동물생명공학회지 Vol.23 No.2
Bone marrow (BM) cell harvesting is a crucial element in the isolation of mesenchymal stem cells (MSCs). A simple method for harvesting cat BM cells is described. The results show that a large number of BM cells can rapidly be harvested from the cat by this simple procedure. MSCs prepared by density-gradient method were spindle-shaped morphology with bipolar or polygonal cell bodies and strongly positive for CD9 and CD44 and negative for CD18 and CD45-like. They were capable of differentiation to adipocytic and osteocytic phenotypes when exposed to appropriate induction media. The advantages of this method are its rapidity, simplicity, low invasiveness, and low donor attrition and good outcome.
JIN, Guang-Zhen,YIN, Xi-Jun,YU, Xian-Feng,CHO, Su-Jin,CHOI, Eu-Gene,LEE, Young-S,JEON, Jin-Tae,YEE, Sung-Tae,KONG, Il-Keun Japanese Society of Veterinary Science 2008 The Journal of veterinary medical science Vol.70 No.7
<P>Umbilical cord blood (UCB)-derived mesenchymal stem cells (MSCs) are multipotent adult stem cells, which can differentiation into cells of connective tissue and neural lineages. This study investigated the potential for neuronal differentiation of red fluorescent protein (RFP)-transgenic cat UCB-derived MSCs. The cells were cultured in pre-induction medium for 24 hr and in neuronal-induction medium for 72 hr. Immunofluorescent staining showed that 6.85% of the total cells were β III-tubulin-positive, 3.37% were neurofilament light (NF-L)-positive and 7.04% were neurofilament medium (NF-M)-positive. A β III-tubulin band was detected by western blot analysis. Our results demonstrate that RFP-transgenic UCB-derived MSCs can be differentiated into neuronal cells <I>in vitro</I>. Thus, RFP-transgenic MSCs could provide alternative tracing material for stem cell transplantation.</P>
( Jun Yao ),( Qing Na Kong ),( Hua Yue Zhu ),( Zhen Zhang ),( Yu Yang Long ),( Dong Sheng Shen ) 한국화학공학회 2015 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.53 No.4
The adsorption characteristics of ammonia on MSWI bottom ash were investigated. The effect of the variation of the landfill environmental parameters including pH, anions and organic matter on the adsorption process was discussed. Results showed that the adsorption could be well described by pseudo-second-order kinetics and Langmuir model, with a maximum adsorption capacity of 156.2 mg/g. The optimum adsorption of ammonia was observed when the pH was 6.0. High level of ion and organic matter could restrict the adsorption to a low level. The above results suggested that MSWI bottom ash could affect the migration of ammonia in the landfill, which is related to the variation of the landfill circumstance.