1,285 Result(s)

Article

Morphological peculiarities of synthesized diamonds and a preliminary discussion on the region for perfect diamond crystal growth

Crystal habit and morphological peculiarities of synthetic diamonds at various temperatures and pressures have been studied. A diagram has been proposed based on experimental data for different crystal morphol...

Huifang Fu, Chengming Zhu in Geochemistry (1982)

Article

Ultrastructure of sperm cells and the male germ unit in pollen tubes ofNicotiana tabacum

The structure of sperm cells and their association with the vegetative nucleus in pollen tubes ofNicotiana tabacum grown in styles were observed with the electron microscope, demonstrating the existence of a male...

Hong-Shi Yu, Shi-Yi Hu, Cheng Zhu in Protoplasma (1989)

Article

Radioimmunolocalization of xenografted human gastric adenocarcinoma with¹³¹I-labeled monoclonal antibody RWS₄ in nude mice

The monoclonal antibody (MAb) RWS₄ specific to membrane-associated antigen of human gastric adenocarcinoma was purified by protein A-Sepharose 4B affinity chromatography and labeled with¹³¹I by chloramine-T metho...

Yuxin Wu, Daoyou **, Chunxian Yu, Shaoji Jiang… in Chinese Journal of Cancer Research (1990)

Article

T subsets and antitumor activity of lymphocytes infiltrating human primary brain gliomas

Glioma-infiltrating lymphocytes (GIL) were isolated from 9 surgical biopsy specimens of primary brain gliomas using mechanical and enzymatic digestion and discontinuous density gradent centrifugation. During c...

Youjun Li, Cheng Zhu, **antao Kong, Guangji Zhang in Chinese Journal of Cancer Research (1992)

Article

The self-adjointness of Hermitian Hamiltonians

For several examples of Hermitian operators, the issues involved in their possible self-adjoint extension are shown to conform with recognizable properties in the solutions to the associated classical equation...

Chengjun Zhu, John R. Klauder in Foundations of Physics (1993)

Article

Distribution of periglacial geomorphology and the relationship between periglacial geomorphology and glaciated history on fildes Peninsula, King George Island, Antarctica

As for the formation of the submerged trough of Maxwell Bay and the external agent geomorphic-phenomena of Fildes Peninsula, we can use glaciated theory to explain them. Moreover, based on a large number of fi...

Cheng Zhu, Zhijiu Cui in Chinese Geographical Science (1993)

Article

The significance of P53 gene mutations and expressions in human colorectal tumors

Using a polymerase chain reaction-single strand conformation polymorphism (PCR-SSCP) approach we analyzed 18 human colorectal adenocarcinomas for mutations in exons 5,6,7,8 of p53 gene. At the same time, p53 g...

Qian Hua, Yu Baoming, Zhou **geng, Wang Ruinian… in Chinese Journal of Cancer Research (1996)

Article

Cell mechanics and adhesion

Robert Hochmuth, Cheng Zhu in Annals of Biomedical Engineering (1997)

Article

Comparison of quaternary deposit environment among Lushan, Huangshan and Tianmu mountains

The data of Fe³⁺/Fe²⁺ show that the lowest annual air temperature of the Lushan, Huangshan and Tianmu mountains was not below 0°C, therefore, glacier couldn’t develop in these regions. According to palaeomagnetic...

Cheng Zhu, Yougui Song in Chinese Geographical Science (1997)

Article

Effective Method for the Covalent Introduction of the 2-(2-Carboxymethoxyethoxy)ethoxy Group on a Glassy Carbon Electrode by Anodization in Triethylene Glycol

The effects of supporting electrolytes used for anodizing a glassy carbon (GC) electrode in triethylene glycol on the extent of the 2-(2-carboxymethoxyethoxy)ethoxy group introduced on the anodized electrode s...

Hatsuo Maeda, Takehiro Kitano, Cheng Zhu Huang, Kazunori Katayama… in Analytical Sciences (1999)

Article

A modified Boyden chamber assay for tumor cell transendothelial migration in vitro

We have developed a modified Boyden chamber system for assessing tumor cell transmigration across endothelial monolayer in vitro. This radiometric-based method allows us to take into account the cells which ha...

Yu-Hua Li, Cheng Zhu in Clinical & Experimental Metastasis (1999)

Article

Do lamprophyric magma carry gold ?

By taking lamprophyres in the Laowangzhai gold orefield, Yunnan Province, as starting materials, the melting experiments of lamprophyre + gold have been conducted under 1.5 and 3.0 GPa in a DS-29A cubic-type 3...

Zhilong Huang, Chengming Zhu, Huayun **ao, Congqiang Liu in Chinese Science Bulletin (1999)

Article

Expression and regulation of mRNAs for insulin-like growth factor-I receptor and LH receptor in corpora lutea

Relationship between insulin-like growth factor-I receptor (IGF-IR) and luteinizing hormone receptor (LHR) mRNA expression as well as their regulation was determined in rat corpora lutea (CL). In the CL of est...

Wenxiang Lou, Cheng Zhu in Science in China Series C: Life Sciences (2000)

Article

Expression and regulation of mRNAs for insulin-like growth factor (IGF-I), IGF-binding protein-2, and LH receptor in the process of follicular atresia

Expression of mRNAs for IGF-I, IGF-binding protein-2 (IGFBP-2), and LH receptor (LHR) as well as their regulations during induced follicular atresia was determined. 26-day-old female rats received 15 IU pregna...

Wenxiang Luo, Cheng Zhu in Science in China Series C: Life Sciences (2000)

Article

Telomere dysfunction impairs DNA repair and enhances sensitivity to ionizing radiation

Telomeres are specialized nucleoprotein complexes that serve as protective caps of linear eukaryotic chromosomes. Loss of telomere function is associated with rampant genetic instability and loss of cellular v...

Kwok-Kin Wong, Sandy Chang, Sarah R. Weiler, Shridar Ganesan… in Nature Genetics (2000)

Article

Paleo-environmental reconstruction during the period of Nan**g Homo Erectus

Using five-group dating of the fossil by Uranium series age method shows that the age of Nan**g Homo Erectus is between 280–430 ka B. P. Combining with the analysis of fossil mammalian form Stegodon, Sus. Lydekk...

Cheng Zhu, Yun Zhang in Chinese Geographical Science (2000)

Article

Short-term precursor of the geomagnetic horizontal field transfer functions

In this paper, using the variometer data of Changli station and Baijiatuan station from 1972 to 1997, the inter-station transfer functions of horizontal field and the single-station transfer functions of verti...

Shao-**g Gong, Zhen-li Tian, Cheng-zhu Qi, Shu-min He… in Acta Seismologica Sinica (2001)

Article

Study on the frequency and principle of flood catastrophe in the Changjiang delta and its neighboring regions in the last 2000 years

Documented materials, especially those about flooding catastrophe, are abundant comprehensive and well-preserved, which makes possible the systematical collection of materials about historical document about c...

Sheng Zhang, Cheng Zhu, Qiang Zhang in Chinese Geographical Science (2001)

Article

A Five-Phase Reservation Protocol (FPRP) for Mobile Ad Hoc Networks

A new single channel, time division multiple access (TDMA)-based broadcast scheduling protocol, termed the Five-Phase Reservation Protocol (FPRP), is presented for mobile ad hoc networks. The protocol jointly ...

Chenxi Zhu, M.S. Corson in Wireless Networks (2001)