| 单词 | volumetric |
| 例句 | Now it joined her dance, showing her feeling for line and volumetric shape. Dance Review: Eva Yerbabuena Stars in Flamenco Festival 2014-03-10T21:17:14Z But because the basic unit in Sebring’s system is still photography rather than film, Sebring said, the process is quicker and less expensive than volumetric video. Dancing for Many Cameras, in the Round: ‘It’s Muybridge on Steroids’ 2021-01-26T05:00:00Z And inside, the volumetric, spatial qualities are one of a kind. The 25 Most Significant Works of Postwar Architecture 2021-08-02T04:00:00Z “What they’re doing is very much in tune with the latest developments in volumetric video technologies,” the filmmaker Alla Kovgan, who directed the 3-D dance documentary “Cunningham,” said in a recent interview. Dancing for Many Cameras, in the Round: ‘It’s Muybridge on Steroids’ 2021-01-26T05:00:00Z His works are all about contrasts and balances: wood with metal, raw with painted, shiny with matte, line with plane, folded with volumetric. Art In Review: BILL WALTON 2012-03-15T21:43:00Z Her opening dance — “Mayur Alarippu,” evoking the peacock — abounded in arresting details of style: tiny shudders, little trills of the feet and richly volumetric use of arm gestures to open up the surrounding space. Dance Review: Indian Dances at the Erasing Borders Festival 2013-08-16T22:24:56Z A lot of the classic roles tend to be larger than life, and you have to be able to occupy a lot of volumetric space and fill it truthfully, without hamming it up.” Arts & Leisure: Matthew Broderick in ?Nice Work if You Can Get It? 2012-04-05T15:10:22Z He makes convincingly volumetric still lifes and figurative tableaus, working mostly from mental pictures. Art in Review 2010-02-25T20:58:00Z To simulate volumetric muscle loss injury, a large chunk of muscle has been removed from the hind legs of these animals. Injectable tissue prosthesis to aid in damaged muscle/nerve regeneration 2023-11-01T04:00:00Z Brain volumetric measures of children were taken using MRI scans at age 10. Exposure to plasticizers in pregnancy associated with smaller volumetric measures in the brain and lower IQ in children 2023-09-20T04:00:00Z The other, Proto, also in L.A., displays life-size volumetric holograms inside a large box with a new degree of persuasiveness. At Walmart, a hologram Sam Walton hints at the surreal future of Black Friday shopping 2022-11-25T05:00:00Z Some agencies opted to reduce residents to one-day-a-week outdoor watering restrictions, but others, including the DWP, chose instead to stay within a specific volumetric allocation. L.A. tries to live with brown lawns as water restrictions yield results: 'It's so sad' 2022-07-13T04:00:00Z “I directed the piece and was in the room. We built the green screen studio as part of a volumetric capture for an AR hologram,” Williams wrote. NOT REAL NEWS: A look at what didn’t happen this week 2022-06-24T04:00:00Z The styles couldn’t be more different from the complex spatial elaboration seen in European Baroque sculpture and painting, with their emphasis on volumetric figures deployed in a spiraling infinity of deep space. Review: What LACMA's collection of Spanish American art, 1500-1800, says about the world today 2022-06-20T04:00:00Z Some will go to one-day-a-week watering, while others are sticking to volumetric allocations based on available supplies, officials said. New drought rules go into effect today. Here's what you need to know 2022-06-01T04:00:00Z The plan was designed to achieve at least a 35% reduction in water consumption, which can be done through volumetric allocations or one-day-a-week watering limitations. L.A. is taking a different path on severe watering restrictions. Here's how it will work 2022-05-11T04:00:00Z Instead, it will focus on staying at or below a monthly volumetric allocation, top officials said. DWP customers in L.A. face two-day-a-week water restrictions amid drought 2022-05-10T04:00:00Z It will draw the curtains to keep volumetric lighting out and puke all over the exquisite tiling so you’re not distracted by its intricate patterns. A new wave of lo-fi games is reshaping horror 2021-10-29T04:00:00Z Daniel Stoner, who has developed low-rise apartment buildings using the Lego-style technique known as volumetric modular construction, said he expected to save time but spend about the same in construction costs. As housing costs climb, another Seattle apartment project tests a new way of building 2021-10-23T04:00:00Z Read next: The No Man’s Sky travel diaries The changes include new weather effects, volumetric lighting, furry aliens, skies full of stars, and more. No Man’s Sky is getting a ‘visual overhaul’ and flying pets 2021-06-02T04:00:00Z “We developed new technology to handle the volumetric fog of the souls,” Docter says of the fuzzy and translucent beings floating along in the film’s so-called Great Before and Great Beyond. Pixar’s ‘Soul’ raises a big question for our surreal year: ‘What am I doing with my time on earth?’ 2020-12-25T05:00:00Z So this is a simple volumetric massing that is very banal. Who is behind the fake Trump Presidential Library website? We talk to the anonymous architect 2020-12-07T05:00:00Z “The only physical shooting we did was in a volumetric capture studio in Japan,” Cihelna tells The Verge. How Japanese rock star Miyavi performs in a world without live music 2020-08-28T04:00:00Z Green said such high-tech terms as “voxels” - similar to pixels in the 3D age - and “volumetric video” will become common. NBA teams enhancing fan experience with high-tech replays 2019-11-15T05:00:00Z Green said such high-tech terms as “voxels” — similar to pixels in the 3D age — and “volumetric video” will become common. NBA teams enhancing fan experience with high-tech replays 2019-11-15T05:00:00Z The volumetric display uses 256 tiny speakers to move a tiny foam bead so fast that it appears as a larger object floating in space. Daily briefing: Unexpected discovery in basic mathematics 2019-11-12T05:00:00Z Still, he is hopeful that work bringing together different and more-practical technologies, including acoustic levitation, will help volumetric display to find its killer app. Star Wars-style 3D images created from single speck of foam 2019-11-12T05:00:00Z “This particular display is interesting because it’s much closer to commercialization than other types of free-space volumetric displays,” he says. Hearing Is Seeing: Sound Waves Create a 3-D Display 2019-11-13T05:00:00Z But he added: "With the introduction of volumetric video and 5G networks capable of providing distribution, VR video content is expected to become more compelling, but we are several years away from realising that vision." Google and BBC scrap VR projects 2019-10-17T04:00:00Z The press release describes Jaunt’s specialty as “the scalable creation and distribution of volumetric video of humans,” which may hint at why Verizon is interested. Verizon is buying all the tech from augmented reality startup Jaunt XR 2019-09-30T04:00:00Z One day in Lausanne, it occurred to Ledgard that “we have no word to describe the volumetric space in the sky. What we see is what is on it, like stage scenery.” Jonathan Ledgard Believes Imagination Could Save the World 2019-09-16T04:00:00Z A globe in a volumetric display.This was shot using exposure times of 0.025–20 seconds. Star Wars-style 3D images created from single speck of foam 2019-11-12T05:00:00Z But with a volumetric display, a small, portable device might produce a much larger picture. Hearing Is Seeing: Sound Waves Create a 3-D Display 2019-11-13T05:00:00Z The vessel is a volumetric void, defined by clay walls. Review: LACMA’s ‘Art of Korean Writing’ reveals the brilliance in each brushstroke 2019-06-29T04:00:00Z Javier Jara, the country’s undersecretary of the electronic government department of the telecommunications ministry, also claimed on Monday that many of the “volumetric attacks” were associated with “threats from those groups linked to Julian Assange.” Ecuador hit with 40 million cyber-attacks since Julian Assange arrest 2019-04-16T04:00:00Z But the volumetric projections add up to the same thing: a larger two-dimensional screen whenever the users need one, offering more info and, presumably, more “buttons” to play with. Science fiction shows why Samsung’s folding phones might thrive 2018-11-14T05:00:00Z The acoustic device, described in Nature3 on 13 November, is the latest example of a 3D-image-generation technology known as volumetric display, which differs in fundamental ways from technologies such as holograms, virtual reality and stereoscopes. Star Wars-style 3D images created from single speck of foam 2019-11-12T05:00:00Z This so-called volumetric capture isn’t perfect, but Reach works well enough to allow a huge portion of people to suddenly create within this previously unplayable form. How Nonny de la Peña, the “Godmother of VR,” Is Changing the Mediascape 2018-11-03T04:00:00Z Wearing 3-D glasses to get the comic strip’s volumetric effect, you read the text: “In death, the world becomes 3 dimensional, the material world without time.” Review: With 'Double Vision' at LACMA, 3-D art strives to find a new dimension 2018-08-07T04:00:00Z The resulting map would need to be an all-inclusive spatial database, but how volumetric cartography might look is not yet imagined. Who owns the space under cities? The attempt to map the ground beneath our feet 2018-07-10T04:00:00Z Since then, it seems that visions of the future have migrated primarily to transparent tablets and volumetric projections, often known as holographic displays. Science fiction shows why Samsung’s folding phones might thrive 2018-11-14T05:00:00Z Research into volumetric displays is even older than that film. Star Wars-style 3D images created from single speck of foam 2019-11-12T05:00:00Z Moreover, because of the need to store oxygen, the volumetric energy densities of lithium–oxygen systems may be too small for practical applications12. A lithium–oxygen battery with a long cycle life in an air-like atmosphere 2018-03-20T04:00:00Z Going from holograms to this type of technology — technically called volumetric display — is like shifting from a two-dimensional printer to a three-dimensional printer, Smalley said. Better than holograms: A new 3-D projection into thin air 2018-01-24T05:00:00Z I’d first heard about 8i in January of this year, and spent a day in Los Angeles learning about their approach to making volumetric video. Are holograms the future of how we capture memories? 2017-11-07T05:00:00Z That lead to further exploration in the world of volumetric cinematography. The man who created bullet-time is going to Magic Leap 2017-10-26T04:00:00Z Only a few years ago terms such as "immersive", "experiential", "volumetric" and "virtual reality" were on the outer fringe of film-making. Is 2017 the year of virtual reality film-making? - BBC News 2017-04-19T04:00:00Z They would then install a stealthy ribbon of cameras, “volumetric microwave sensors” and fibre-optics along the border to detect potential intruders, although perhaps Trump might want to put the microwaves to another kind of use. Watchtowers, drones and a toxic moat: the designs for Trump's border wall 2017-04-10T04:00:00Z Mr Blau said the use of volumetric video - which lets viewers peer around objects as though they were really present in the captured scene - was impressive. CES 2017: Intel VR headset turns living room into game - BBC News 2017-01-04T05:00:00Z Scott attributes her reaction partly to the realness of the volumetric video, which lets you walk around a digital object, get close to it, peer at it, and in a limited way, interact with it. Are holograms the future of how we capture memories? 2017-11-07T05:00:00Z Over the years at ChefSteps, he’s found, “Once a home cook learns to work with a scale, they never look back to the archaic approach of using volumetric measures.” If you’re interested in accuracy, speed and consistency when you cook, you need to use a scale 2016-10-04T04:00:00Z The $13 average would include both fixed and volumetric fees on a customer’s bill. Exelon-owned power companies seek to raise electric bills 2016-09-20T04:00:00Z “In the food science community, as well as in the weights and measures community, foam is not measured on a volumetric basis,” the plaintiffs argued in their suit. Judge allows Starbucks customers to sue over underfilled lattes 2016-06-20T04:00:00Z To retain the drama of its “volumetric space” he dug down to lower the floor slightly, giving himself enough roof height to install two floating mezzanines floors with four bedrooms flanking a double-height entrance hall. British Barns With Blue-Blood Prices 2016-04-14T04:00:00Z While 360-degree footage allows you look around you from a static position, volumetric capture turns the tables, and allows you walk around a static subject. This might be the beginning of 4D GIFs 2016-02-19T05:00:00Z “I’m not sure that I’m personally convinced that the volumetric comparison truly captures all that complexity.” Climate change can tear down mountains 2015-11-23T05:00:00Z After some quick research on Hoffman, she discovered that the former executive was an apple-cheeked Eastern European brunette with a volumetric ’80s bob. Director’s Darling: Kate Winslet Stars in the Highly Anticipated Film ‘Steve Jobs’ 2015-09-30T04:00:00Z Physicians are just starting to learn why the process, called fat grafting or volumetric restoration, works. These 3 Trends Are Changing the Face of Plastic Surgery 2015-04-30T04:00:00Z “The Order’s” use of volumetric lighting is startling. The Order: 1886 reviewed — A beautiful, boring disappointment 2015-02-23T05:00:00Z “Precise measurements, such as the crater’s volumetric mass, for instance, are useful in understanding the level of energy required for an eruption . . .and informs potential risk levels for the future.” Watch This Amazing Volcano Footage Shot By a Drone 2015-02-03T05:00:00Z "In 2014 we saw more volumetric attacks, with attackers trying to knock people offline by saturating their access to the internet." Web attacks 'growing' in volume 2015-01-27T05:00:00Z These attacks are typically network based volumetric attacks that rely on SYN floods and reflected UDP attacks which would render the sites inaccessible. Feedly Suffers Extortion Related DDoS Attack 2014-06-11T04:00:00Z The present study showed similarities in the remodeling characteristics of xenogeneic ECM scaffolds when used as a surgical treatment for volumetric muscle loss in both a preclinical rodent model and five male patients. [Research Articles] An Acellular Biologic Scaffold Promotes Skeletal Muscle Formation in Mice and Humans with Volumetric Muscle Loss 2014-04-30T18:55:14.141Z How does the volumetric flow rate compare with the mass flow rate? Spilling Science: Can Solid Candies Flow Like Liquids? 2013-10-31T14:45:03.513Z The revamped Call of Duty engine also ushers in HDR and volumetric lighting. 'Call of Duty: Ghosts' Disappoints With Underwhelming Graphics Overhaul, Deluge Of Scripted Events 2013-06-14T16:37:00Z Daniel Sternoff, senior managing director at Medley Global Advisors, a consultancy which advises hedge funds and investors, said he expects "a pretty significant volumetric requirement" in the bill. Lawmakers in new drive to slash Iran's oil sales to a trickle 2013-06-06T05:13:54Z Like other incentive programs, the costs incurred by the utility in purchasing renewable energy is spread across all ratepayers in the form of a volumetric “Surcharge for renewable energy.” Mitsubishi Moves into Distributed Solar 2013-06-04T15:15:26Z To examine the extent of both the cortical and subcortical lesions of each brain, Dronkers’s team used high resolution volumetric MRI. The man who couldn t speak and how he revolutionized psychology 2013-02-08T20:15:05.317Z For example, if you used one cup of M&M's and it took two seconds to flow through, the volumetric flow rate would be 0.5 cup per second. Spilling Science: Can Solid Candies Flow Like Liquids? 2013-10-31T14:45:03.513Z The moderate after-tax earnings contribution, coupled with the reduction of volumetric risk assumed with the midstream assets will solidify the company's credit profile. TEXT-Fitch:Dominion's participation in JV to develop Utica Midstream assets supports credit quality 2012-12-21T13:31:22Z “There were measurable volumetric changes in the cerebral cortex,” Rauh notes. Common Pesticide "Disturbs" the Brains of Children 2012-05-01T21:45:02.183Z "It will hardly last 10 cycles because of the high volumetric changes," admits Kumar. New Energy-Dense Battery Could Enable Long-Distance Electric Cars 2012-02-27T23:45:00.223Z In one of them, read in 1814, he explains the principles of volumetric analysis, in which he was one of the earliest workers. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 9 "Dagupan" to "David" 2012-02-11T03:03:39.807Z Do you think other factors, such as surface texture and shape, might affect the volumetric flow rate? Spilling Science: Can Solid Candies Flow Like Liquids? 2013-10-31T14:45:03.513Z They were well aware of the loss of volumetric efficiency inherent in this valve, and apparently went to some pains to obtain from it the best performance possible. The Wright Brothers' Engines and Their Design 2012-02-04T03:00:15.650Z Titrā′tion, volumetric analysis, the process of ascertaining the quantity of any given constituent present in a compound by observing it under the application of standard solutions. Chambers's Twentieth Century Dictionary (part 4 of 4: S-Z and supplements) 2012-01-30T03:00:19.113Z The following table gives the average volumetric composition of illuminating gas in various cities: Cities. Gas-Engines and Producer-Gas Plants A Practice Treatise Setting Forth the Principles of Gas-Engines and Producer Design, the Selection and Installation of an Engine, Conditions of Perfect Operation, Producer-Gas Engines and Their Possibilities, the Care of Gas-Engines and Producer-Gas Plants, with a Chapter on Volatile Hydrocarbon and Oil Engines 2011-12-28T03:00:31.087Z The strength of this liquid was found by means of volumetric analysis with a standard solution of argentic nitrate in the usual manner. Scientific American Supplement, No. 648, June 2, 1888. 2011-12-26T03:00:15.410Z What is the volumetric flow rate of your candy? Spilling Science: Can Solid Candies Flow Like Liquids? 2013-10-31T14:45:03.513Z Since intestinal contents were included, a volumetric analysis was not feasible. Natural History of Cottonmouth Moccasin, Agkistrodon piscovorus (Reptilia) 2011-12-17T03:00:17.963Z The valves and valve springs are especially accessible and of such size as to permit high volumetric efficiency. Aviation Engines Design?Construction?Operation and Repair 2011-12-04T03:00:04.777Z "The exciting next step will be to determine, as with other addictions, whether volumetric differences are a cause or effect of excessive human behavior," she said in an emailed comment about the study. Keen video-gamers' brains may reward them more 2011-11-15T15:52:21Z The meter is a volumetric displacement one and is regulated by observing the number of pulsations per minute. Chlorination of Water 2011-09-13T02:00:32.243Z How do other factors affect a material's volumetric flow rate? Spilling Science: Can Solid Candies Flow Like Liquids? 2013-10-31T14:45:03.513Z And, Dr. Ludlow said, there is not yet scientific data to prove that the 3-D technology, sometimes known as volumetric imaging, produces better results. Radiation Worries for Children in Dentists? Chairs 2010-11-23T03:10:00Z Thus: suppose it is desired to know the volumetric relationships of the cylinder for a compression pressure of 75 lbs. gauge. Aviation Engines Design?Construction?Operation and Repair 2011-12-04T03:00:04.777Z Iron.—The methods used in the assay for iron are volumetric, and are all based on the property possessed by certain reagents of oxidizing iron from the ferrous to the ferric state. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens" Wash into a 500 cubic centimeter volumetric flask and bring to the mark with distilled water. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. For the operations of volumetric analysis by liquids this is still done. The Methods of Glass Blowing and of Working Silica in the Oxy-Gas Flame For the use of chemical and physical students Methods of Calibration.—In the case of apparatus for volumetric work, this is usually carried out by weighing, although some of the smaller subdivisions are often made by measurement. A Handbook of Laboratory Glass-Blowing Conversely, knowing the volumetric ratios, compression pressure can be read directly by proceeding from the scale of abscissas vertically to the curve and thence horizontally to the scale of ordinates. Aviation Engines Design?Construction?Operation and Repair 2011-12-04T03:00:04.777Z There are several volumetric methods for assaying lead ores, but the best known is that based on the precipitation of lead by ammonium molybdate in an acetic acid solution. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens" According to Lewkowitsch, the results obtained by the volumetric method which assumes a combining weight of 346 for resin acids, are very likely to be high. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. The course in quantitative analysis should cover the determination of the more important basic and acid radicals, and should consist of both gravimetric and volumetric exercises. College Teaching Studies in Methods of Teaching in the College This constant having been fixed, prepare various solutions of germicide-x with sterilised distilled water by accurate volumetric methods, commencing with a solution somewhat stronger than that representing the inhibition coefficient. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. The inherently lower volumetric efficiency of the L head engine is largely overcome by the use of a properly designed head, large valves and ample gas passages. Aviation Engines Design?Construction?Operation and Repair 2011-12-04T03:00:04.777Z Copper.—The fire assay for copper ores was abandoned years ago and the electrolytic method took its place; this in turn is now largely replaced by volumetric methods. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens" If dependence is being placed upon the volumetric method, it is advisable to lengthen the duration of the test considerably, and if possible to measure the feed-water evaporated at the same time. Steam Turbines A Book of Instruction for the Adjustment and Operation of the Principal Types of this Class of Prime Movers This brings us at once to the consideration of that theory which probably has held our attention for the longest period of time, i. e., the volumetric theory. Glaucoma A Symposium Presented at a Meeting of the Chicago Ophthalmological Society, November 17, 1913 When the iron in the solution much exceeds 0.2 gram the volumetric determination is generally adopted, as the bulkiness of the precipitate of ferric hydrate makes the gravimetric method very inconvenient. A Text-book of Assaying: For the Use of Those Connected with Mines. Tests are also made to determine porosity, permeability, volumetric changes in setting, absorption, coefficient of expansion, effect of oil, etc. Transactions of the American Society of Civil Engineers, vol. LXX, Dec. 1910 Federal Investigations of Mine Accidents, Structural Materials and Fuels. Paper No. 1171 Lead.—The “dry” or fire assay for lead is largely used for the valuation of lead ores, although it is being gradually replaced by volumetric methods. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens" Full description of a new and important volumetric determination.—1 illustration. Scientific American Supplement, No. 561, October 2, 1886 Further discussion on the inadequacy of the volumetric theory need not detain us. Glaucoma A Symposium Presented at a Meeting of the Chicago Ophthalmological Society, November 17, 1913 It is chiefly used as an oxidizing agent in volumetric work, being sharp in its reactions and easily detected in minute quantities. A Text-book of Assaying: For the Use of Those Connected with Mines. The separation of copper from cadmium being difficult and laborious, and the volumetric estimation with potassium cyanide not practicable, it is not prudent to apply this method. Scientific American Supplement, No. 455, September 20, 1884 For many years, as a matter of convenience, the classes for which this text was originally prepared were divided, one part beginning with gravimetric processes and the other with volumetric analyses. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Organic reagents used in gravimetric and volumetric analysis. U.S. Copyright Renewals, 1976 July - December The volumetric proportions of each element in the oxides of nitrogen are exhibited below. An Introduction to Chemical Science Wet assays, as generally understood, would include not only those which we class as wet gravimetric assays, but also all the volumetric processes. A Text-book of Assaying: For the Use of Those Connected with Mines. The gravimetric method can be substituted by the volumetric by introducing a solution of sodium sulphide of known strength into the ammoniacal filtrate. Scientific American Supplement, No. 455, September 20, 1884 After a careful review of the experience thus gained the conclusion has been reached that volumetric analysis offers the better approach to the subject. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes A volumetric assay for nickel is based on this. A Text-book of Assaying: For the Use of Those Connected with Mines. In volumetric analysis the change brought about must be one in which the end of the reaction is rendered prominent either by a change of colour or by the presence or absence of a precipitate. A Text-book of Assaying: For the Use of Those Connected with Mines. Chromates are reduced to chromic salts by the action of most reducing agents in the presence of an acid; and this property is used in assaying for the volumetric determination of ferrous iron, &c. A Text-book of Assaying: For the Use of Those Connected with Mines. There are a large number of volumetric assays of which this is true, but that it is true in any particular case can only be proved by experiment. A Text-book of Assaying: For the Use of Those Connected with Mines. The methods of quantitative analysis are subdivided, according to their nature, into those of !gravimetric analysis, volumetric analysis!, and !colorimetric analysis!. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes The other is known as "Volhard's," and resembles in principle and method an ordinary volumetric process. A Text-book of Assaying: For the Use of Those Connected with Mines. It is used as an indicator in volumetric silver assaying, and for the separation of iodine from bromine. A Text-book of Assaying: For the Use of Those Connected with Mines. The chromates in solution are more stable than other similar oxidising agents, and consequently are generally used in the laboratory as one of the standard oxidising agents for volumetric analysis. A Text-book of Assaying: For the Use of Those Connected with Mines. In one determine the iron by reducing and titrating in the way described under volumetric iron. A Text-book of Assaying: For the Use of Those Connected with Mines. The student should also keep constantly in mind the fact that all volumetric operations, to be exact, should be carried out as nearly at a constant temperature as is practicable. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes It is made by diluting 10 c.c. of the solution of lead nitrate, described under the volumetric process, to 1 litre. A Text-book of Assaying: For the Use of Those Connected with Mines. There is no dry assay for this substance, nor volumetric method; when the determination is required, it is carried out gravimetrically and, generally, by the following plan. A Text-book of Assaying: For the Use of Those Connected with Mines. The aqueous extract containing the chromate is ready for volumetric work, except in those cases where nitre has been used. A Text-book of Assaying: For the Use of Those Connected with Mines. Two burettes, one at least of which should have a glass stopper, are required throughout the volumetric work. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes This is a !volumetric! process, and is equivalent to weighing without the use of a balance. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes The application of these general statements will be made clear in connection with the use of normal solutions in the various types of volumetric processes which follow. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes In the oxidation processes of volumetric analysis standard solutions of oxidizing agents and of reducing agents take the place of the acid and alkali solutions of the neutralization processes already studied. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Unfortunately this titration serves simply to replace the gravimetric determination, and does not, as many volumetric processes do, lessen the necessity for a complete separation of any other metals which are present. A Text-book of Assaying: For the Use of Those Connected with Mines. The important oxidizing agents employed in volumetric solutions are potassium bichromate, potassium permangenate, potassium ferricyanide, iodine, ferric chloride, and sodium hypochlorite. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes The processes of volumetric analysis are, in general, simpler than those of gravimetric analysis and accordingly serve best as an introduction to the practice of quantitative analysis. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes The titration of iodine against sodium thiosulphate, with starch as an indicator, may perhaps be regarded as the most accurate of volumetric processes. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Such hydrolytic processes as the above are of great importance in analytical chemistry, especially in the understanding of the action of indicators in volumetric analysis. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes If the volumetric method is to be used, the lead sulphate should be dissolved out with a solution of sodium acetate instead of with the ammonium salt solution. A Text-book of Assaying: For the Use of Those Connected with Mines. |
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