Tailings disposal in the form of mineral slurry has a number of advantages, among which we can highlight the environmental, social, operational and technical nature. This alternative arrangement of the tailings is a technology that has been developed rapidly highlighting the sector thickening equipment manufacturers and transportation. The main objective of this work was to evaluate the production of concentrated suspensions minerals known as pasta tailings from beneficiation processes manganese obtained by a paste thickener scale laboratory. The study includes the characterization of the solid sample, evaluation of flocculation (type and dosage), use of a producer of pulp laboratory scale equipment with a useful capacity of 7 liters for the formation of mineral paste through continuous feed of pulp, evaluation of influence on the solids concentration using generator floc (RGF), characte...

Tailings disposal in the form of mineral slurry has a number of advantages, among which we can highlight the environmental, social, operational and technical nature. This alternative arrangement of the tailings is a technology that has been developed rapidly highlighting the sector thickening equipment manufacturers and transportation. The main objective of this work was to evaluate the production of concentrated suspensions minerals known as pasta tailings from beneficiation processes manganese obtained by a paste thickener scale laboratory. The study includes the characterization of the solid sample, evaluation of flocculation (type and dosage), use of a producer of pulp laboratory scale equipment with a useful capacity of 7 liters for the formation of mineral paste through continuous feed of pulp, evaluation of influence on the solids concentration using generator floc (RGF), characte...

Lucuma (Pouteria lucuma) is an important exportation fruit in Peru. In this work, the odour-active volatile changes during fruit ripening were studied by using a sensomics approach (GC-O in combination with GC-MS analyses). The volatile compound extracts from unripe and ripe fruits were obtained by solvent-assisted flavour extraction (SAFE) with dichloromethane. By application of the aroma extract dilution analysis (AEDA) on the ripe fruit extract, 16 odour-active compounds were detected as responsible of sweet, green, and rancid odour-notes, characteristics of this fruit. Based on odour activity value (OAV) calculation, 2,3-butanedione, methional, (Z)-3-hexenal, (E)-2-hexenal, (Z)-?-ocimene, and 3-methyl butanoic acid were identified as key-aroma compounds in this fruit. These compounds were also quantitated in the unripe fruit SAFE extract finding that their amount increased with durin...

The aim was to improve the pregnancy rate in recipient alpacas following embryo transfer. Two experiments were carried out, Experiment 1 in the southern highlands (4,100 m elevation) and Experiment 2 (E2) in the central highlands (3,200 m elevation) of the Peruvian Andes. In both experiments, a group of alpaca donors was subjected to superovulation and embryo flushing as per procedures already described (Vivanco 2013 29th Annu. Mtg. European Embryo Transfer Association, 43–74). The synchronization of the recipient alpacas and ovulation induction in both experiments was made by ultrasonography selection of the alpacas with follicles greater than 8 mm and their exposure to vasectomized males followed by an injection of GnRH (0.0042 mg of acetate of buserelin, Buserelina Zoovet®, Laboratorio Zoovet, Santa Fe, Argentina). The embryo transfers in both locations were made by laparoscopicall...