Biomedical subjects

Jian-qi Wang

Publications and source records attributed to Jian-qi Wang.

4 recordsLinked to original sources

PubMed2006

[Expression of TGFbeta1 and its type I receptors ALK1 and ALK5 mRNA in brain arteriovenous malformation].

OBJECTIVE: To explore the expression of transforming growth factor beta1 (TGFbeta1) and its type I receptors activin-like kinase 1 (ALK1) and ALK5 mRNA in the development of brain arteriovenous malformation (BAVM). METHODS: The mRNA expressions of TGFbeta1, ALK1and ALK5 were detected with semiquantitative RT-PCR in patients with BAVM. RESULTS: The expressions of TGFbeta1 and ALK5 mRNA increased significantly in BAVM, and their relative expression quantity were 0.777-/+0.047 and 0.585-/+0.074, respectively. However, ALK1 mRNA expression declined significantlies with a relative expression of 0.173-/+0.044 in comparison with the control group (0.720-/+0.098, P<0.01). CONCLUSION: The balance of TGFbeta1 and its type I receptors ALK1 and ALK5 mRNA expressions may play important role in the development of BAVM.

Activin Receptors, Type II↗

PubMed2004

Study on a non-contact life parameter detection system using millimeter wave.

OBJECTIVE: To study the basic principle and design method of a non-contact life detection system using 36 GHz millimeter wave. METHOD: Continuous wave radar techniques and signal processing techniques including zero intermediate frequency, frequency domain accumulation and adaptive noise cancellation were used in the system. RESULT: When the radiated power was about a milliwatt (mW) and detection range was up to 3 meters, the experimental results showed that this system can well detect the heartbeat and respiration signals from human subjects through common clothes and quilts. CONCLUSION: The system is feasible and effective due to its high detection sensitivity, small antenna, simple structure, easy miniaturization and safety to the human subject. It can be used for long-term continuous monitoring, especially suitable for the astronauts.

Aerospace Medicine↗

PubMed2002

[Development of an analysis system for X-ray cephalometry by Windows platform].

Here in this paper introduced is an analysis system for X-ray cephalometry developed through Windows platform,which includes three parts: data input, cephalometry analysis & calculation, and display & printing of diagnostic results. It has been applied in orthodontic department of Stomatological Hospital of the Fourth Military Medical University, and it is quite convenient for doctors' cephalometry diagnosis.

Cephalometry↗

PubMed2002

[Research on the hyperthermia-therapy performances of invasive microwave antennas].

The paper introduces four kinds of 2450 MHz antennas including noninsulted (bare), insulated-open-tip (I.O.T.), dipole-type and sleeve invasive microwave ones. The comparison between the antennas' hyperthermia performances in the muscle tissue phantom made by specific absorption rate (SAR) shows that the sleeve antenna is the best. It has a bigger heating range and a changeless shape and is independent of the inserting depth.

Equipment Design↗