This study aimed to develop a protocol of semen cryopreservation of the mutton snapper Lutjanus analis. The interaction between three extenders ( pH 6.1; 7.8 and 8.2) , two concentrations of dimethyl sulfoxide ( DMSO, 5 and 10%) and three cooling rates ( -90; -60 and -30°C.min-1) on the sperm motility rate and motility time were analyzed by a factorial experiment. A sample of 30 fishes ( 1,261 ...

Storage and cooling of highly charged ions require ultra-high vacuum levels obtainable by means of cryogenic methods. We have developed a linear Paul trap operating at 4 K capable of very long ion storage times of about 30 h. A conservative upper bound of the H(2) partial pressure of about 10(-15) mbar (at 4 K) is obtained from this. External ion injection is possible and optimized optical acce...

The most promising applications for thermoacoustic cooling are investigated from the perspective of the thermodynamic second law efficiency in this paper. A design optimization program interacting with the thermoacoustic simulation program known as DELTAE was developed. Then it was applied to two of the most common configurations for standing-wave thermoacoustic coolers in order to determine th...

We present a rigorous theoretical study of low-temperature collisions of polyatomic molecular radicals with (1)S(0) atoms in the presence of an external magnetic field. Accurate quantum scattering calculations based on ab initio and scaled interaction potentials show that collision-induced spin relaxation of the prototypical organic molecule CH(2)(X(3)B(1)) (methylene) and nine other triatomic ...

We report on the current status of CLIO (Cryogenic Laser Interferometer Observatory), which is a prototype interferometer for LCGT (large scale cryogenic gravitational-wave telescope). LCGT is a Japanese next-generation interferometric gravitational-wave detector featuring the use of cryogenic mirrors and a quiet underground site. The main purpose of CLIO is to demonstrate a reduction of the mi...

The heat balance method is developed to optimize cooling modes of large-sized optics in a special cryogenic-vacuum system by considering complicated transfer the minimize thermal deformations. Keywords: radiative transfer, conductive balance, thermostat, collimator.

Abstract Manufacturing craves for more sustainable solutions machining heat-resistant alloys. In this paper, an assessment of different cooling lubrication approaches Ti6Al4V milling was carried out. Cryogenic cutting (liquid nitrogen) and conventional (oil-based fluid) were assessed with respect to dry cutting. To study the effects main relevant process parameters, proper energy models develop...

As we enter a new millennium, society is faced with fresh challenges in every conceivable area. Through the speciality of forensic odontology, dentistry plays a small but significant role in identification of individuals. Cryogenic Grinding is the act of cooling or chilling a material and then reducing it to a small particle size. DNA is extracted from human teeth with the help of cryogenic gri...