Terminator-free template-independent enzymatic DNA synthesis for digital information storage.

DNA is an emerging medium for digital data and its adoption can be accelerated by synthesis processes specialized for storage applications. Here, we describe a de novo enzymatic synthesis strategy designed for data storage which harnesses the template-independent polymerase terminal deoxynucleotidyl transferase (TdT) in kinetically controlled conditions. Information is stored in transitions between non-identical nucleotides of DNA strands.

[Dynamic popliteal phlebography].

Since 1984, dynamic popliteal phlebography is an investigative fundamental technique in chronic venous insufficiency of the lower extremities. Our experience includes more than 2,500 examinations. After an anatomical reminder, the technique and methodology of this examination are described.

[Phlebography in chronic venous insufficiency of the lower extremities. Technic and value of different tests].

Remainder of the various phlebographic procedures in chronic venous insufficiency of the lower extremities: peripheral phlebography, popliteal phlebography, femoral phlebography, varicography. The techniques and the informations they provide are presented for each one of these examinations.

[Critical study and Doppler-arteriographies correlations in a homogeneous series of 115 examinations of the lower limbs (author's transl)].

Correlations between the results of Doppler and arteriographic examinations were studied in a series of 115 angiographies of the limbs, including global findings and 10 specific parameters of importance in vascular surgery. Overall results were strictly comparable in 70 % of cases. Detailed study of 1,150 parameters (10 x 115) revealed only 42 occasions (4 %) when Doppler and angiographic results could not be correlated.