Rapid, large-scale temperature changes in the polar mesosphere and their relationship to meridional flows

first_imgMesospheric temperatures derived from spectroscopic measurements of the hydroxyl (OH) nightglow have been observed from Rothera (67.6°S, 68.1°W) and Halley (75.6°S, 26.6°W) stations in Antarctica during the 2002 austral winter season. In addition to the normal seasonal changes, the temperatures at both sites, separated by 1658 km, showed several simultaneous shifts in temperature of between 10 and 20 K. These changes abruptly occurred in the space of 2–3 days and lasted for several days. These rapid variations in temperature were associated with large swings observed in the meridional component of the mesospheric wind measured by the Rothera MF radar. As there appeared to be no phase shift between the temperature variations at the two longitudinally separated stations indicating that planetary-waves caused the changes, these large-scale changes have been interpreted as variations in the inter-hemispheric meridional jet, and a corresponding modulation of the mesospheric descent and adiabatic heating rates over the polar region.last_img read more

Production of Lovastatin by Penicillium spp. Soil microfungi

first_imgLovastatin is an important fungal secondary metabolite inhibiting the enzyme which catalyzes a rate-limiting step in the biosynthesis of cholesterol. As microfungi of the genus Penicillium are active producers of cholesterol lowering agents (statins), studies of this genus have gained considerable momentum. In Malaysia, both agricultural soils and those of natural ecosystems are valuable sources of filamentous fungi, whose biotechnological potential in terms of lovastatin production has not been well investigated. The aim of the present study is to determine lovastatin-producing potential of Penicillium spp. microfungi isolated from soil in Pahang State (Malaysia). Fungal cultures were isolated, purified, and classified based on characters of colony morphology and microscopic features. All identified representatives of Penicillium were tested for their ability to produce lovastatin. Isolates were cultivated in submerged fermentation. High-performance liquid chromatography (HPLC) was used for detection of lovastatin. Among 54 fungal cultures examined, four Penicillium strains were confirmed to produce this statin. The isolate Penicillium sp. ESF2M was the strongest lovastatin producer, with a yield of 20 mg/l. This strain should now be subjected to a further strain improvement program to maximize the yield of this important statin.last_img read more

Spacecraft charging related risk of floating connector pins

first_imgEvery national spacecraft charging related design guideline or design standard includes prohibitions against floating, or ungrounded, connector pins. The rationale is obvious. A floating connector pin represents ungrounded metal with a propensity to accumulate charge from the space plasma environment and, upon breakdown, effectively couple the discharge energy directly into sensitive system electronics by virtue of adjacent pins and cables. Satellite designers may recognize that, seemingly as common as the rationale is obvious, there are instances in violation of this clear guideline and impassioned arguments for permissions to do so. This paper represents a comprehensive effort to quantitatively, theoretically, analytically, and empirically assess the risk associated with ungrounded connector pins in the selected (geostationary earth orbit and medium earth orbit) orbits.last_img read more

Utah Men’s Golf To Host Showdown in the Rockies

first_imgSeptember 13, 2018 /Sports News – Local Utah Men’s Golf To Host Showdown in the Rockies FacebookTwitterLinkedInEmail DRIGGS, Idaho-The University of Utah’s men’s golf squad will host the Showdown in the Rockies Monday and Tuesday September 17 and 18.This two-day 54-hole event will be hosted by the Huntsman Springs Golf Course of Driggs, Idaho.The Utes will compete at this event against Arizona, Boise State, Colorado, Oregon State, Santa Clara, Saint Mary’s, Texas Tech, Utah State and Utah Valley.At this tournament, the Utes will be represented by senior Kyler Dunkle of Larkspur, Colo., junior Jordan Costello of Pinedale, Wyo., sophomore Tristan Mandur of Mill Bay, British Columbia, Canada, sophomore Blake Tomlinson of Salt Lake City’s Sklyline High School, junior Mitchell Schow of Ogden, Utah and Park City High School, junior Peyton Hastings of Bountiful, Utah and Woods Cross High School, freshman Axel Einarsson of Ludvika, Sweden, sophomore Colton Tanner of Park City, Utah and freshman Jonathan Wijono of Surabaya, Indonesia. Written by Brad James Tags: Arizona/Axel Einarsson/Blake Tomlinson/Boise State/Colorado/Colton Tanner/Jonathan Wijono/Jordan Costello/Kyler Dunkle/Mitchell Schow/Oregon State/Peyton Hastings/Saint Mary’s/Santa Clara/Showdown in the Rockies/Texas Tech/Tristan Mandur/Utah Men’s Golf/Utah State/Utah Valleylast_img read more

North Sevier’s Kamree Brunson Signs With Otero JC On A Softball Scholarship

first_img Written by November 7, 2019 /Sports News – Local North Sevier’s Kamree Brunson Signs With Otero JC On A Softball Scholarship FacebookTwitterLinkedInEmailSALINA, Utah-Per news released Thursday on the North Sevier High School twitter account, Wolves multi-sport star athlete, senior, Kamree Brunson has signed with the Otero Junior College Rattlers of La Junta, Colo. on a softball scholarship.Brunson is primarily known for her softball skills.Per information from MaxPreps, Brunson, a native of Aurora, Utah, has 11 career home runs, 96 hits and 69 career RBI.Furthermore, she has collected 30 career doubles and 11 career triples for the Wolves. Tags: Kamree Brunson/North Sevier Softball/Otero JC Rattlers Brad Jameslast_img read more

Dixie State Baseball Improves To 2-0 On the Season With Win Over Cal State-San Marcos

first_img FacebookTwitterLinkedInEmailSAN MARCOS, Calif.-Tyson Fisher homered and singled as Dixie State bested Cal State-San Marcos 5-2 Saturday in non-conference baseball action at CSUSM Baseball Field on an 83-degree Saturday afternoon.Cade Spurlin added a sacrifice fly RBI and a home run for the 2-0 Trailblazers, who will go for the series sweep Sunday.Jack Gonzales earned the win on the mound for Dixie State, who improved to 2-0 all-time against the Cougars with the win. Tags: Dixie baseball Written by February 1, 2020 /Sports News – Local Dixie State Baseball Improves To 2-0 On the Season With Win Over Cal State-San Marcos Brad Jameslast_img read more

Snow Men’s Basketball Signs CJ Plantin

first_img Written by June 3, 2020 /Sports News – Local Snow Men’s Basketball Signs CJ Plantin FacebookTwitterLinkedInEmailEPHRAIM, Utah-Wednesday, Snow College men’s basketball signed 6-4 guard CJ Plantin per a report on the squad’s Instagram account.Plantin starred at Westside High School of Anderson, S.C., averaging 12.9 points and 9.7 rebounds per game for the Rams last season, helping the squad to a 16-11 record in the 2019-20 season.For his high school career, Plantin averaged 12.7 points and 9.3 rebounds per contest for Westside. Brad James Tags: CJ Plantinlast_img read more

West Coast Conference Postpones All Fall Sports Until September 24

first_imgJuly 16, 2020 /Sports News – Local West Coast Conference Postpones All Fall Sports Until September 24 FacebookTwitterLinkedInEmailSAN BRUNO, Calif.-Per a Thursday statement, the West Coast Conference’s Presidents’ Council will delay the beginning of fall competition in all sports the conference sponsors because of covid-19.The conference confirmed all competitions for fall sports will be delayed until at least September 24.This decision entails BYU men’s and women’s cross country, women’s soccer and women’s volleyball.This does not affect BYU football as this is an independent FBS program and the West Coast Conference does not sponsor football.The same is true for the University of San Diego as the Toreros are an independent FCS football program.Institutions are also not allowed to participate in any non-conference competitions prior to September 24 per the statement. Written by Brad James Tags: BYU Athleticslast_img read more

EP Energy secures plan support agreement with key creditors and commitment for significant new money investment

first_img Image: EP Energy has secured plan support agreement with key creditors. Photo: courtesy of rawpixel/Pixabay. EP Energy Corporation (“EP Energy” or the “Company”) (OTC Pink: EPEGQ) today announced that it has entered into a Backstop Commitment Agreement (the “Backstop Agreement”) and Plan Support Agreement (the “PSA”) with a number of its key creditors on the terms of a comprehensive restructuring plan (the “Plan”). The Backstop Agreement and PSA memorialize the terms of the previously disclosed agreement in principle reached on October 3, 2019, and will provide for, among other things: (1) a substantial reduction of the Company’s existing funded debt by approximately $3.3 billion, (2) a substantial reduction of the Company’s annual debt service obligations by up to $263 million, and (3) a $475 million rights offering, approximately $463 million of which is backstopped by parties holding approximately 52.0% of the Debtors’ 1.25L Notes and approximately 79.3% of the Debtors’ 1.5L Notes. In addition, the Company has entered into a commitment letter under which over 90% of the Company’s existing revolving loan lenders have committed to provide support for an approximately $629 million Senior Secured Exit Financing.President and Chief Executive Officer Russell Parker said, “We are pleased to have reached an agreement with a substantial group of our key creditors on a plan that will facilitate our goal of significantly reducing our debt and enhancing our long-term competitive position. This agreement demonstrates our creditors’ confidence in our business and will enable EP Energy to work through the financial restructuring process on an expedited basis as we continue our operations without interruption. The EP Energy team remains focused on improving operational execution and capital efficiency and positioning the Company to succeed in the current operating environment. We appreciate the continued dedication of our talented team of employees, and the partnership of our royalty owners, lessors, vendors and business partners.”As previously announced, EP Energy voluntarily filed for chapter 11 reorganization in the U.S. Bankruptcy Court for the Southern District of Texas. EP Energy is continuing to operate in the normal course during the financial restructuring process. Source: Company Press Release Reorganization expected to reduce company’s existing debt by approximately $3.3 billionlast_img read more

MAPNA wins new contract from NIOC for Parsi and Paranj oil fields

first_img NIOC awards new contract to MAPNA for the Parsi and Paranj oil fields. (Credit: NIOC/Hamidreza Norouzi) The MAPNA Group has secured a 10-year contract from the National Iranian Oil Company (NIOC) to further develop the Parsi and Paranj oil fields in Iran.Under the terms of the Iranian petroleum contract (IPC), the company will be responsible for boosting the oil recovery rate and increasing production and exploitation of the two fields.The contract awarded to the MAPNA Group is based on an agreed plan for the comprehensive development and operation of the fields located in the southwest Khuzestan province, said NIOC.In August 2018, the MAPNA Group was given a contract from NIOC’s subsidiary National Iranian South Oil Company (NISOC) to develop the Parsi and Paranj oil fields, reported Financial Tribune.Through the latest contract, the Iranian oil company aims to see a maximum production of 85,000 barrels of oil per day.NIOC estimates a direct capital cost of $876.6m for the project and an indirect cost of $235.3m. On the other hand, the cost of exploitation is projected to be $269m.Work expected to be done by MAPNA Group under the new contractAccording to the state-owned company, the scope of the contract covers upgrading and construction of surface installations, drilling of new wells, repairing existing wells, gas lift operation, split layer operation, drilling and EOR studies, piloting EOR plans, technology transfer, and research and development among others.The surface installations will include operation unit, desalination, gas injection facilities, flow, gas pressure collecting and boosting facilities, and transmission pipelines and other associated facilities.NIOC, in a statement, said: “Implementing this plan while increasing the crude oil production capacity of the country, will create widespread employment opportunities in Khuzestan province and also a favorable job market.”The Parsi oil field is located in ​​the southern part of Dezful, nearly 125km from Ahvaz in southwest Iran. The Paranj oil field is located between the Karanj and Parsi fields, 75km from Behbahan and 40km from Ramhormoz. In August 2018, the MAPNA Group was given a contract from NIOC’s subsidiary NISOC to develop the two Iranian oil fields last_img read more