ocean star mud pump free sample
Lone Star Drills, a division of Little Beaver Inc. and manufacturer of efficient and portable drilling equipment, upgraded its LS200H and LS200H+ model drills with a Flomax 10 mud pump powered by an 8-horsepower Honda GX240 gas engine. The enhanced pump gives operators greater drilling speeds with approximately 40% more pressure and 30% more gallons of mud flow per minute over the previous pump setup.
“A mud pump is a crucial piece of equipment for ensuring mud rotary drilling efficiency,” said Joe Haynes, president of Little Beaver. “The feedback we’ve received from trials with this new setup has been outstanding. Crews were drilling noticeably faster than before because the system is providing a better flow of mud into the borehole, so we’ve made the new pump and engine a permanent fixture in our drill lineup.”
The new pump and engine come standard on the LS200H and LS200H+ hydraulic water well drills and are an optional upgrade for the LS100 and LS200 mechanical water well drills. A 10-horsepower Yanmar L100N diesel option is also available to power the Flomax on the LS200H and LS200H+.
The new Flomax 10 pump paired with the 8-horsepower engine provides 61 psi and 200 gallons of mud flow per minute, an upgrade of nearly 20 psi and an additional 50 gallons of flow per minute. The Flomax features a 2-by-2-inch inlet and outlet and incorporates tighter tolerances to handle the increased pressure from the larger engine.
Haynes said the increased pressure allows the new pump setup to not only quickly fill the borehole with a column of mud to remove cuttings more efficiently during drilling, but also handles thicker mud than the previous pump system. This provides crews with increased borehole stability as it replaces the dirt removed during drilling.
Lone Star Drills’ LS200H and LS200H+ water well drills are capable of drilling depths of 200 feet, borehole diameters of six inches and pull/push-back forces up to 5,000 pounds. The first drills in the Lone Star hydraulic lineup, the LS200H and LS200H+ feature 2,500- and 3,000-psi hydraulic systems respectively. Both drills can be upgraded with a down-the-hole hammer kit, anchor kit, wheel kit and more.
The mud pump is the heart of mud rotary drilling. This crucial piece of equipment is responsible for removing the cuttings produced when drilling a water well. Sure, on the surface, the mud pump might not be the most exciting part of a water well drilling rig. But if your crew relies on mud rotary drilling methods, your operation will literally be stuck in the mud without the proper mud pump — no matter how much horsepower and torque your drill sends down the borehole.
To better understand why the mud pump should be a key consideration when selecting a water well drill we need to take a closer look at this un-sung hero of water well drilling.
Despite its simplicity, the humble mud pump plays an important part in overall drilling efficiency. As crew members drill, the drill bit produces cuttings. These pile up in the bottom of the borehole and prevent crews from making progress – like trying to dig a hole with a shovel but throwing the dirt back into the hole every time. Mud pumps offer a solution.
Water is pumped from the mud pump to the drill pipe where it exits through the holes in the drill bit — which may be several inches or hundreds of feet deep in the borehole. Water fills the borehole, forcing the loose cuttings up and out of the hole.
Instead, we put the drilling process first. Lone Star Drills has spent decades growing its drill lineup based not just on specs, but on grueling real-world performance. No one knows better than the person in the field, so we’re constantly sending out new mud pumps and new designs to our customers across the globe and innovating our mud pumps to maximize efficiency.
But keep in mind the mud pump is only part of the overall water well drilling rig. How the whole system works together will determine water well drilling effectiveness. For example, our drills incorporate a three-way valve with a bypass so crews can quickly divert the flow of water from the mud pump, add drill pipe, reconnect water flow and continue drilling all within seconds. Drills that don’t have this feature require crews to fully shut down the mud pump to stop water flow, add drill pipe and power back on the mud pump to restart water flow — a burdensome process for deep wells that require dozens of pipe sections.
Proper mud pump pairing is the key to efficient water well drilling. That’s why Lone Star Drills offers a variety of mud pumps to match the drill for optimal performance. We offer both gasoline- and diesel-powered pumps offering up to 13 horsepower for achieving greater depths.
In addition to flushing cuttings, the mud pump helps stabilize the borehole, as the mixture of water and mud keeps it from collapsing. Using the mud pump, crews can even add bentonite to the pumped water to create a coating that binds to the borehole walls and prevents water from escaping.
The report covers comprehensive information about market trends, volume (Units) and value (US$ Mn) projections, competition and recent developments and market dynamics in the global mud pumps market for the study period of 2013 to 2026.
The global mud pumps market is expected to reach a little over US$ 1,085 Mn over the forecast period, registering a CAGR of 4.4%. Growth in drilling activities in the oil & gas Industry to increase hydrocarbon production and ease of the mud circulation operation in drilling holes are some of the factors expected to lay a robust foundation for the growth of the global mud pumps market.
Mud pumps can be classified on the basis of the number of pistons into duplex, triplex and quintuplex, which consist of two, three and five pistons respectively. The triplex segment is expected to dominate the mud pumps market in terms of value as well as volume during the entire forecast period.
Triplex mud pumps find extensive usage in circulating drilling fluid with high pressure for deep oil well drilling application. These usage characteristics make them preferable for use, primarily in onshore and offshore oil well drilling applications.
Mud pumps are widely utilized in the oil & gas industry. On the basis of the mode of operation, mud pumps can be classified as electric and fuel engine mud pumps.
Fuel engine mud pumps use petroleum oils as the key liquefying agent. These types of mud pumps release hazardous gases into the environment. In order to contain the hazardous impact of fuel engine mud pumps on the environment, regulatory authorities are compelling manufacturers and consumers to opt for electric mud pumps, which do not emit volatile organic compounds and operate with low noise and low vibration. Electric mud pumps offer smooth operations in drilling rigs and are environment-friendly, which is why they dominate the market for mud pumps.
The electric mud pumps segment is projected to grow with a 4.5% CAGR during the forecast period in view of the tightening emission control regulations and is expected to create an absolute $ opportunity worth US$ 134 Mn between 2018 and 2026.
Among all the applications analyzed in this global mud pumps market study, the onshore application of mud pumps is expected to register about 1.43X growth in terms of value between 2018 and 2026. The offshore application of mud pumps is projected to register moderate growth during the entire forecast period, led by land oil field discoveries.
In terms of incremental $ opportunity, onshore and offshore segments are expected to compete within large margins. The onshore application of mud pumps is expected to occupy over an 86% share in terms of value by the end of 2026.
Increasing oil-well exploration activities, stable economic conditions and consistent growth in oil well drilling rig sales in the region are expected to drive the demand for mud pumps in the region.
The comparatively well-established production sector in the region and increasing oil and gas industry and hydrocarbon consumption will create a healthy platform for the growth of the mud pumps market. Some regions including China and Europe are expected to gain traction in the latter half of the forecast period, owing to the anticipated growth of the oil & gas industry in these regions. North America is expected to register above-average 1.1X growth in the market. All the other regions are anticipated to exhibit moderate growth during the same period.
The global mud pumps market is consolidated with limited market players holding considerable double-digit market shares as of 2017. Globally, the top 12 players in the mud pumps market collectively hold between 53% and 58% of the market share.
Over the past few years, the mud pumps market has witnessed significant technological advancement from the competition perspective. Acquisitions, collaborations and new product launches are some of the key strategies adopted by prominent players to expand and sustain in the global mud pumps market.
In 2015, Flowserve opened a new pump manufacturing plant in Coimbatore, India. Through this new facility, the company aims to provide pump products for the oil and gas industry in Asia Pacific
Some of the key players involved in this market study on the global mud pumps market include National Oil Varco Inc., Schlumberger Limited, Gardner Denver Inc., Weatherford International Plc., China National Petroleum Corporation, Trevi-Finanziaria Industriale S.p.A., MhWirth, BenTech GmbH Drilling Oilfield systems, American Block Inc., Honghua Group Limited, White Star Pump Company LLC, Flowserve corporation, Ohara Corporation, Mud King Products, Inc. and Herrenknecht Vertical GmbH.
The 2,200-hp mud pump for offshore applications is a single-acting reciprocating triplex mud pump designed for high fluid flow rates, even at low operating speeds, and with a long stroke design. These features reduce the number of load reversals in critical components and increase the life of fluid end parts.
The pump’s critical components are strategically placed to make maintenance and inspection far easier and safer. The two-piece, quick-release piston rod lets you remove the piston without disturbing the liner, minimizing downtime when you’re replacing fluid parts.
Bruce Suggs, vice president of marketing and sales for White Star, speaks with DC editorial coordinator Katherine Scott about White Star’s quadraplex mud pump at its headquarters in Waller, Texas, on 17 February.
Drilling Contractor visited the manufacturing facility of White Star Pump Company in Waller, Texas, on 17 February to view a demonstration of the company’s quadraplex mud pump, which was designed to address the challenges of the conventional triplex pump.
“After working on all the different brands of (triplex) pumps, it became evident that they all had the same common issues,” said Bruce Suggs, vice president of marketing and sales for White Star. “(We) tried to build a triplex and ended up with the Quatro.”
Instead of taking an existing triplex pump and trying to make it better, White Star approached the project with a clean-sheet design. The Quatro pump features a width of only 82 in. and easily fits on a standard-width trailer, a potential advantage in areas with limited space, such as on offshore rigs and in shale plays like the Marcellus. With the fluid modules sitting inside the frame, change-out time can be reduced to 23 minutes versus up to 10 hours for conventional triplex pumps. The quadraplex pump also uses a fully assembled crankshaft that requires no castings or welding. Using a crankshaft that is fully assembled and supported by modern bearing placement dramatically reduces crankshaft bending and cracking.
Additionally, the Quatro is equipped with two pulsation dampeners, one for each pair of pistons, unlike the triplex, which carries only one. This allows mud to be dampened before it gets to the strain across, creating a quieter, smoother fluid flow and reducing vibrations.
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A diatom (Neo-Latin diatoma)genera of algae, specifically microalgae, found in the oceans, waterways and soils of the world. Living diatoms make up a significant portion of the Earth"s biomass: they generate about 20 to 50 percent of the oxygen produced on the planet each year,silicon each year from the waters in which they live,shells of dead diatoms can reach as much as a half-mile (800 m) deep on the ocean floor, and the entire Amazon basin is fertilized annually by 27 million tons of diatom shell dust transported by transatlantic winds from the African Sahara, much of it from the Bodélé Depression, which was once made up of a system of fresh-water lakes.
Diatoms are unicellular organisms: they occur either as solitary cells or in colonies, which can take the shape of ribbons, fans, zigzags, or stars. Individual cells range in size from 2 to 200 micrometers.asexual multiple fission; the maximum life span of individual cells is about six days.centric diatoms) are radially symmetric, while most (pennate diatoms) are broadly bilaterally symmetric. A unique feature of diatom anatomy is that they are surrounded by a cell wall made of silica (hydrated silicon dioxide), called a frustule.structural coloration due to their photonic nanostructure, prompting them to be described as "jewels of the sea" and "living opals". Movement in diatoms primarily occurs passively as a result of both ocean currents and wind-induced water turbulence; however, male gametes of centric diatoms have flagella, permitting active movement to seek female gametes. Similar to plants, diatoms convert light energy to chemical energy by photosynthesis, but their chloroplasts were acquired in different ways.
Dwindling diatoms and the mixed layer Earth"s oceans teem with microscopic plants called phytoplankton. But according to a 2015 NASA study, populations of diatoms, the largest type of phytoplankton algae, have declined more than 1 percent per year from 1998 to 2012. Phytoplankton are an essential base of the marine food web and absorb carbon dioxide dissolved in the ocean that originally came from the atmosphere. The tiny organisms occupy the uppermost layer of ocean water, called the mixed layer, where waves and currents continually churn, drawing up nutrients from a deeper layer of water below. Scientists say the phytoplankton declines observed over the 15-year study period are due to the mixed layer becoming shallower, which results in fewer nutrients reaching the diatoms. The reduction in population may reduce the amount of carbon dioxide drawn out of the atmosphere and transferred to the deep ocean for long-term storage.
(d) Red: [chlorophyll autofluorescence] - resolves chloroplasts The animation starts by overlaying all available fluorescent channels, and then clarifies the visualisation by switching channels on and off
Diatoms are protists that form massive annual spring and fall blooms in aquatic environments and are estimated to be responsible for about half of photosynthesis in the global oceans.
The ability of diatoms to make silica-based cell walls has been the subject of fascination for centuries. It started with a microscopic observation by an anonymous English country nobleman in 1703, who observed an object that looked like a chain of regular parallelograms and debated whether it was just crystals of salt, or a plant.silicic acid in a "subcolloidal" statematerial characterisation, molecular biology, "omics, and transgenic approaches. The results from this work have given a better understanding of cell wall formation processes, establishing fundamental knowledge which can be used to create models that contextualise current findings and clarify how the process works.
Most centric and araphid pennate diatoms are nonmotile, and their relatively dense cell walls cause them to readily sink. Planktonic forms in open water usually rely on turbulent mixing of the upper layers of the oceanic waters by the wind to keep them suspended in sunlit surface waters. Many planktonic diatoms have also evolved features that slow their sinking rate, such as spines or the ability to grow in colonial chains.surface area to volume ratio and drag, allowing them to stay suspended in the water column longer. Individual cells may regulate buoyancy via an ionic pump.
Certain species of bacteria in oceans and lakes can accelerate the rate of dissolution of silica in dead and living diatoms by using hydrolytic enzymes to break down the organic algal material.
Diatoms are a widespread group and can be found in the oceans, in fresh water, in soils, and on damp surfaces. They are one of the dominant components of phytoplankton in nutrient-rich coastal waters and during oceanic spring blooms, since they can divide more rapidly than other groups of phytoplankton.pelagically in open water, although some live as surface films at the water-sediment interface (benthic), or even under damp atmospheric conditions. They are especially important in oceans, where they contribute an estimated 45% of the total oceanic primary production of organic material.
When conditions turn unfavourable, usually upon depletion of nutrients, diatom cells typically increase in sinking rate and exit the upper mixed layer ("bust"). This sinking is induced by either a loss of buoyancy control, the synthesis of mucilage that sticks diatoms cells together, or the production of heavy resting spores. Sinking out of the upper mixed layer removes diatoms from conditions unfavourable to growth, including grazer populations and higher temperatures (which would otherwise increase cell metabolism). Cells reaching deeper water or the shallow seafloor can then rest until conditions become more favourable again. In the open ocean, many sinking cells are lost to the deep, but refuge populations can persist near the thermocline.
Ultimately, diatom cells in these resting populations re-enter the upper mixed layer when vertical mixing entrains them. In most circumstances, this mixing also replenishes nutrients in the upper mixed layer, setting the scene for the next round of diatom blooms. In the open ocean (away from areas of continuous upwelling
In the open ocean, the diatom (spring) bloom is typically ended by a shortage of silicon. Unlike other minerals, the requirement for silicon is unique to diatoms and it is not regenerated in the plankton ecosystem as efficiently as, for instance, nitrogen or phosphorus nutrients. This can be seen in maps of surface nutrient concentrations – as nutrients decline along gradients, silicon is usually the first to be exhausted (followed normally by nitrogen then phosphorus).
Because of this bloom-and-bust cycle, diatoms are believed to play a disproportionately important role in the export of carbon from oceanic surface watersbiological pump). Significantly, they also play a key role in the regulation of the biogeochemical cycle of silicon in the modern ocean.
Diatoms are ecologically successful, and occur in virtually every environment that contains water – not only oceans, seas, lakes, and streams, but also soil and wetlands.cell walls, silica frustules require less energy to synthesize (approximately 8% of a comparable organic wall), potentially a significant saving on the overall cell energy budget. In a now classic study, Egge and Aksnes (1992)dominance of mesocosm communities was directly related to the availability of silicic acid – when concentrations were greater than 2 μmol m−3, they found that diatoms typically represented more than 70% of the phytoplankton community. Other researcherspH buffering agent, facilitating the conversion of bicarbonate to dissolved CO2 (which is more readily assimilated). More generally, notwithstanding these possible advantages conferred by their use of silicon, diatoms typically have higher growth rates than other algae of the same corresponding size.
Diatoms can be obtained from multiple sources.barnacles, oyster and other shells. Diatoms are frequently present as a brown, slippery coating on submerged stones and sticks, and may be seen to "stream" with river current. The surface mud of a pond, ditch, or lagoon will almost always yield some diatoms. Living diatoms are often found clinging in great numbers to filamentous algae, or forming gelatinous masses on various submerged plants. molluscs, tunicates, and fishes, the alimentary tracts of these animals often yield forms that are not easily secured in other ways. Diatoms can be made to emerge by filling a jar with water and mud, wrapping it in black paper and letting direct sunlight fall on the surface of the water. Within a day, the diatoms will come to the top in a scum and can be isolated.
The diagram shows the major fluxes of silicon in the current ocean. Most biogenic silica in the ocean (silica produced by biological activity) comes from diatoms. Diatoms extract dissolved silicic acid from surface waters as they grow, and return it to the water column when they die. Inputs of silicon arrive from above via aeolian dust, from the coasts via rivers, and from below via seafloor sediment recycling, weathering, and hydrothermal activity.
Although diatoms may have existed since the Triassic, the timing of their ascendancy and "take-over" of the silicon cycle occurred more recently. Prior to the Phanerozoic (before 544 Ma), it is believed that microbial or inorganic processes weakly regulated the ocean"s silicon cycle.radiolarians and siliceous sponges, the former as zooplankton, the latter as sedentary filter-feeders primarily on the continental shelves.
The diagram depicts some mechanisms by which marine diatoms contribute to the biological carbon pump and influence the ocean carbon cycle. The anthropogenic CO2 emission to the atmosphere (mainly generated by fossil fuel burning and deforestation) is nearly 11 gigatonne carbon (GtC) per year, of which almost 2.5 GtC is taken up by the surface ocean. In surface seawater (pH 8.1–8.4), bicarbonate (HCO−
3) constitute nearly 90 and <10% of dissolved inorganic carbon (DIC) respectively, while dissolved CO2 (CO2 aqueous) contributes <1%. Despite this low level of CO2 in the ocean and its slow diffusion rate in water, diatoms fix 10–20 GtC annually via photosynthesis thanks to their carbon dioxide concentrating mechanisms, allowing them to sustain marine food chains. In addition, 0.1–1% of this organic material produced in the euphotic layer sinks down as particles, thus transferring the surface carbon toward the deep ocean and sequestering atmospheric CO2 for thousands of years or longer. The remaining organic matter is remineralized through respiration. Thus, diatoms are one of the main players in this biological carbon pump, which is arguably the most important biological mechanism in the Earth System allowing CO2 to be removed from the carbon cycle for very long period.
The expansion of grassland biomes and the evolutionary radiation of grasses during the Miocene is believed to have increased the flux of soluble silicon to the oceans, and it has been argued that this promoted the diatoms during the Cenozoic era.
Diatom diversity over the Cenozoic has been very sensitive to global temperature, particularly to the equator-pole temperature gradient. Warmer oceans, particularly warmer polar regions, have in the past been shown to have had substantially lower diatom diversity. Future warm oceans with enhanced polar warming, as projected in global-warming scenarios,
The fossil record of diatoms has largely been established through the recovery of their siliceous frustules in marine and non-marine sediments. Although diatoms have both a marine and non-marine stratigraphic record, diatom biostratigraphy, which is based on time-constrained evolutionary originations and extinctions of unique taxa, is only well developed and widely applicable in marine systems. The duration of diatom species ranges have been documented through the study of ocean cores and rock sequences exposed on land.biozones are well established and calibrated to the geomagnetic polarity time scale (e.g., Southern Ocean, North Pacific, eastern equatorial Pacific), diatom-based age estimates may be resolved to within <100,000 years, although typical age resolution for Cenozoic diatom assemblages is several hundred thousand years.
When diatoms die their shells (frustules) can settle on the seafloor and become microfossils. Over time, these microfossils become buried as opal deposits in the marine sediment. Paleoclimatology is the study of past climates. Proxy data is used in order to relate elements collected in modern-day sedimentary samples to climatic and oceanic conditions in the past. Paleoclimate proxies refer to preserved or fossilized physical markers which serve as substitutes for direct meteorological or ocean measurements.isotope records of δ13C, δ18O, δ30Si (δ13Cdiatom, δ18Odiatom, and δ30Sidiatom). In 2015, Swann and Snelling used these isotope records to document historic changes in the photic zone conditions of the north-west Pacific Ocean, including nutrient supply and the efficiency of the soft-tissue biological pump, from the modern day back to marine isotope stage 5e, which coincides with the last interglacial period. Peaks in opal productivity in the marine isotope stage are associated with the breakdown of the regional halocline stratification and increased nutrient supply to the photic zone.
The Cretaceous record of diatoms is limited, but recent studies reveal a progressive diversification of diatom types. The Cretaceous–Paleogene extinction event, which in the oceans dramatically affected organisms with calcareous skeletons, appears to have had relatively little impact on diatom evolution.
A global trend toward more delicate diatom frustules has been noted from the Oligocene to the Quaternary.ice sheet expansion on Antarctica and progressive cooling through the Neogene and Quaternary towards a bipolar glaciated world. This caused diatoms to take in less silica for the formation of their frustules. Increased mixing of the oceans renews silica and other nutrients necessary for diatom growth in surface waters, especially in regions of coastal and oceanic upwelling.
Decomposition and decay of diatoms leads to organic and inorganic (in the form of silicates) sediment, the inorganic component of which can lead to a method of analyzing past marine environments by corings of ocean floors or bay muds, since the inorganic matter is embedded in deposition of clays and silts and forms a permanent geological record of such marine strata (see siliceous ooze).
Treguer, P.; Nelson, D. M.; Van Bennekom, A. J.; Demaster, D. J.; Leynaert, A.; Queguiner, B. (1995). "The Silica Balance in the World Ocean: A Reestimate". Science. 268 (5209): 375–9. Bibcode:1995Sci...268..375T. doi:10.1126/science.268.5209.375. PMID 17746543. S2CID 5672525.
Nelson, David M.; Tréguer, Paul; Brzezinski, Mark A.; Leynaert, Aude; Quéguiner, Bernard (1995). "Production and dissolution of biogenic silica in the ocean: Revised global estimates, comparison with regional data and relationship to biogenic sedimentation". Global Biogeochemical Cycles. American Geophysical Union (AGU). 9 (3): 359–372. Bibcode:1995GBioC...9..359N. doi:10.1029/95gb01070. ISSN 0886-6236.
Anderson, Lars W. J.; Sweeney, Beatrice M. (1 May 1977). "Diel changes in sedimentation characteristics of Ditylum brightwelli: Changes in cellular lipid and effects of respiratory inhibitors and ion-transport modifiers1". Limnology and Oceanography. 22 (3): 539–552. Bibcode:1977LimOc..22..539A. doi:10.4319/lo.1977.22.3.0539. ISSN 1939-5590.
Yool, Andrew; Tyrrell, Toby (2003). "Role of diatoms in regulating the ocean"s silicon cycle". Global Biogeochemical Cycles. 17 (4): n/a. Bibcode:2003GBioC..17.1103Y. CiteSeerX doi:10.1029/2002GB002018. S2CID 16849373.
Treguer, P.; Nelson, D. M.; Van Bennekom, A. J.; Demaster, D. J.; Leynaert, A.; Queguiner, B. (1995). "The Silica Balance in the World Ocean: A Reestimate". Science. 268 (5209): 375–9. Bibcode:1995Sci...268..375T. doi:10.1126/science.268.5209.375. PMID 17746543. S2CID 5672525.
Schieber, Jürgen; Krinsley, Dave; Riciputi, Lee (2000). "Diagenetic origin of quartz silt in mudstones and implications for silica cycling". Nature. 406 (6799): 981–5. Bibcode:2000Natur.406..981S. doi:10.1038/35023143. PMID 10984049. S2CID 4417951.
Sigman, Daniel M.; Jaccard, Samuel L.; Haug, Gerald H. (2004). "Polar ocean stratification in a cold climate". Nature. Springer Science and Business Media LLC. 428 (6978): 59–63. Bibcode:2004Natur.428...59S. doi:10.1038/nature02357. ISSN 0028-0836. PMID 14999278. S2CID 4329978. Archived from the original on 19 February 2022. Retrieved 15 December 2021.
Galbraith, Eric D.; Kienast, Markus; Jaccard, Samuel L.; Pedersen, Thomas F.; Brunelle, Brigitte G.; Sigman, Daniel M.; Kiefer, Thorsten (23 May 2008). "Consistent relationship between global climate and surface nitrate utilization in the western subarctic Pacific throughout the last 500 ka" (PDF). Paleoceanography. American Geophysical Union (AGU). 23 (2): n/a. Bibcode:2008PalOc..23.2212G. doi:10.1029/2007pa001518. ISSN 0883-8305. S2CID 4082469. Archived (PDF) from the original on 15 July 2021. Retrieved 15 December 2021.
Kohfeld, Karen E.; Chase, Zanna (2011). "Controls on deglacial changes in biogenic fluxes in the North Pacific Ocean". Quaternary Science Reviews. Elsevier BV. 30 (23–24): 3350–3363. Bibcode:2011QSRv...30.3350K. doi:10.1016/j.quascirev.2011.08.007. ISSN 0277-3791.
Barron, J. A. (2003). "Appearance and extinction of planktonic diatoms during the past 18 m.y. in the Pacific and Southern oceans". Diatom Research. 18: 203–224. doi:10.1080/0269249x.2003.9705588. S2CID 84781882.
Drum, Ryan W.; Gordon, Richard (2003). "Star Trek replicators and diatom nanotechnology". Trends in Biotechnology. 21 (8): 325–8. doi:10.1016/S0167-7799(03)00169-0. PMID 12902165.
On the banks of the Red Cedar, a modest tributary that winds through the heart of one of America’s magnificent college campuses, there’s a school that’s known to all. Its specialty is winning: Michigan State University boasts numerous programs that rank among the world’s best, including supply-chain management, agricultural engineering, and graduate education. Oh, and those Spartans play good ball, on the gridiron and the hardwood and beyond, racking up Big Ten titles and churning out professionals, all-stars, Hall of Famers. It’s the home of overachievers and underdogs, an ideal place for someone with a point to prove. The official mantra, “Spartans Will,” is more than a deft motto; it’s a defiant mentality that makes the school exceptional.
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In Emily, a new film about her life in theaters Friday, her difficult personality manifests as a near-paranormal force. Take an early scene, during which Emily (played by Sex Education’s Emma Mackey) puts on a mask for a role-playing guessing game. She’s supposed to choose someone fun to perform as—say, Marie Antoinette—but instead, she channels her late mother. She speaks softly, spooking her siblings, Charlotte (Alexandra Dowling), Anne (Amelia Gething), and Branwell (Fionn Whitehead). By coincidence or some inexplicable power, the winds outside pick up, the windows fling open, and the candles blow out. Her sisters cry hysterically, and Emily seems possessed, unable to remove the mask. The evening, which started in merriment, devolves into terror.