first_imgCold environments impose several ecological and physiological constraints upon arthropods, including reduction of metabolic rate, locomotory activity, and feeding. These result in slow growth rates and extended life cycles. Additionally, the probability of freezing is accentuated at subzero temperatures. Using data for Antarctic mites, the interplay of such constraints is examined, and the resultant ecophysiological adaptations outlined for a common oribatid mite (Alaskozetes antarcticus) of the maritime Antarctic. The synthesis suggests that its survival strategy is comprised of two components. First, the utilization of above-zero temperatures during the short austral summer to maximize growth and production, and thereby reproduce. These processes are aided by an elevation of its standard metabolic rate, commonly termed cold adaptation. Second, the tolerance of freezing temperatures by supercooling of all its postovum life stages throughout the entire year. Its supercooling potential is enhanced by the presence of glycerol and other polyols in the body fluids, the production of which is mediated by environmental temperature and desiccation at low relative humidities. Thus this species, in common perhaps with many other freezing susceptible arthropods, has ensured its survival in southern polar habitats by the evolution of a bipartite adaptational strategy.last_img read more

first_imgBy Yolima Dussán/Diálogo December 18, 2020 On November 16, 2020, a 16-year criminal career came to an end for Emiliano Alcides Osorio, alias Caín, top leader of Los Caparros criminal group. Colombian authorities neutralized him after a confrontation in the town of La Unión, Tarazá municipality, Antioquia. The Colombian government was offering a $130,000 reward for information leading to his whereabouts.“Alias Caín was wanted for the crimes of narcotrafficking, aggravated conspiracy to commit a crime, homicide, trafficking, carrying and possession of firearms, forced displacement, and illegal extraction of minerals in lower Cauca, Antioquia,” Colombian Minister of Defense Carlos Holmes Trujillo told the press on November 17.Also known as Pilatos, Holmes noted, Caín was accused of murdering social leaders and extorting businesses and transportation companies in Antioquia department, in addition to forcefully displacing residents in the region.An intelligence officer who took part in the operation told the Colombian newspaper El Tiempo on November 17 that “[he] earned his alias, Caín, for murdering several first-degree family members.” With this capture, the officer said, one of the country’s most dangerous criminals is off the map. “He used torture and dismemberment as a method for criminal coercion,” El Tiempo reported.On November 17, Army General Juan Carlos Ramírez Trujillo, commander of the Colombian Army Seventh Division, told the media that operations against Los Caparros in 2020 have been significant. “We have captured 117 of its members, 20 bandits have been brought to justice, and 10 have died in military operations,” Gen. Ramírez said.last_img read more

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first_imgBeens Dredging recently put the non-nuclear density meter of Rhosonics into use on their new hopper dredger kb1649 during a project in the Port of Amsterdam.In the port, a certain amount of sludge needed to be removed last month in order to ensure a safe passage for ships.According to the company, the customer wanted a non-nuclear density meter to determine the real-time density of the sludge.“The SDM slurry density meter is a good solution for this measuring task, because of its reliable, stable and real-time measurement results,” the company said. “The SDM contributes to the dredging operation and offers many advantages thanks to its ultrasonic technology.”The SDM contributes to:Determination of the optimal dredging condition;Efficient completion of the dredging session;Reduction of time and money spent on a project;Quicker response to changing process conditions;Less obstruction of the pump.last_img read more

first_imgON the heels of a win two weeks ago in the Odyssey Sightseeing Tours Guyana Inc. tournament, Lusignan Golf Club President Aleem Hussain took advantage to emerge champion in the Silica Sandport Inc. (SSI) 3rd annual Golf Extravaganza on Saturday.A few years ago, Hussain stated that he would be in contention at a Guyana Open and it seems as if he is living up to that promise for the upcoming October 2019 Guyana Open International Golf Invitational.Under excellent golfing weather conditions and with a course in pristine condition, the highly competitive golfers continue showing great improvement in their performances.SSI tournament host, Haresh Tewari, again excelled in his Flight, and this time graciously refused the honour of the win, allowing other golfers to benefit from his tournament sponsorship.Playing injured, 9-time Guyana Open Champion, Avinash Persaud, still turned in a great score and excelled by winning yet another long drive prize, this time almost reaching the green in one.Former Guyana Open Ladies Champion, Shanella London, was in top form as she bested Dr. Joaan Deo in the Ladies category as they prepare for the Suriname Open in two weeks.Ascending to the top position in their respective flights were Rommel Bhagwandin and William Walker; with Walker winning from Robin Tiwari on a countback to secure the first place.Silica Sandport Inc. produces white sand, screening and washing of Silica in a state-of-the-art sand washing facility that obtains sand from part of an extensive silica sand vein that has verifiable reserves in excess of 500 million tons thus enabling SSI to confidently supply washed and graded sand in quantities that fulfil particular needs.In addition to their washed sand product, SSI has the capacity to supply a nematode free, unwashed sand product for use in various manufacturing, construction, landscape and beach applications.The Tiwari family committed to hosting future tournaments and promised that the next one would be even better than the first three.Speaking for the family, Kayshav said that both him and his sister were extremely proud of their dad and their involvement with the game in the Lusignan Village would continue for years to come.President of the LGC, Aleem Hussain, thanked the sponsor who had recently donated loads of special sand for the greens and said that was a contributing factor to his win since the course was in the best condition ever due to the hard work by the staff members– Avinash, Barney and Danai, and assistance from the Lusignan Prison Service.“With the course playing so easy, we will see better performances from all our players as we ramp up for the Suriname and Guyana Opens”, adding that this will be an incredible field of top golfers who are coming from the USA, Canada, Colombia, Trinidad, Suriname and several other countries.last_img read more