Relevant bibliographies by topics / Absorbans

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Absorbans'

Author: Grafiati
Published: 4 June 2021
Last updated: 3 February 2022

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Journal articles on the topic "Absorbans"

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Deng, Jing Lan, and Ke Huang. "Microwave Absorbing Properties of MnO2/Ni-Zn Ferrite/Graphite Structural Composite." Advanced Materials Research 535-537 (June 2012): 201–5. http://dx.doi.org/10.4028/www.scientific.net/amr.535-537.201.

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In order to get high microwave absorbing properties, a new kind of three-layer structure composite absorption material was designed and prepared for optimal attenuation. Manganese Oxide was used as the absorbent in the matching layer. Nickel-Zinc ferrite (Ni-Zn ferrite) was used as the absorbent in the dielectric layer and Graphite was used as the absorbent in absorbing layer. The effects of different proportions of absorbents on the microwave absorbing properties were investigated. The results shows that the maximum wave absorbing peak of the 11# sample with the thickness of 5mm is −38.54dB at 14.35GHz and had a bandwidth of 7.1GHz (R<−10dB). This is very important in the design and application of absorbing material.
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Shen, Hao, Xiang Qian Shen, Min Li, Hong Bo Liu, and Zhou Wang. "Microwave Absorption of Double-Layer Absorber Based on Nanocomposite BaFe12O19/α–Fe and Nanocrystalline Alloy Fe0.2(Co0.2Ni0.8)0.8 Microfibers." Advanced Materials Research 1035 (October 2014): 339–43. http://dx.doi.org/10.4028/www.scientific.net/amr.1035.339.

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In this paper, the prepared nanocomposite BaFe12O19/α-Fe microfibers and nanocrystalline magnetic alloy Fe0.2(Co0.2Ni0.8)0.8 microfibers are used as absorbents in the double layer structure for microwave absorption. The double layer absorbers with a total thickness of 2.0 mm, in which various matching and absorbing layers are designed, and their absorption properties are estimated. The results show that the absorbers with the matching layer of nanocomposite BaFe12O19/α-Fe microfibers have a very high microwave absorption performance. The absorption bandwidth (the reflection loss (RL) less than-20 dB) reaches 5.8 GHz ranging from 12.2 to 18 GHz, and the minimum RL value is-61.2 dB at about 15.2 GHz with 0.9 mm matching layer and 1.1mm absorbing layer respectively.
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Korzeniowski, Janusz. "EXPERIMENTAL CHECKING OF ABSORPTION OF MOISTURE ABSORBERS IN VARIOUS CLIMATE CONDITIONS." PROBLEMY TECHNIKI UZBROJENIA 153, no. 1 (July 3, 2020): 87–108. http://dx.doi.org/10.5604/01.3001.0014.2725.

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The article presents results of tests for moisture absorbers currently used and available on the market. Experimental investigations were carried out for two types of silica gels, the bentonite clay and two types of molecular sieves available on the market, as well as for the reused silica gel currently deployed in weapon systems. As part of the work, the maximum absorbency of moisture absorbers for various climatic conditions, the minimum relative humidity (RH) in the drying measuring chamber for various amounts of absorbent, and the durability of water binding at variable temperature conditions were determined. Analysis of results allowed both to compare advantages and disadvantages of various absorbents, and to assess a degree of the wear for moisture absorbents currently used in armament equipment.
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Purwakusumah, Edy Djauhari, Lusi Royani, and Mohamad Rafi. "Evaluasi Aktivitas Antioksidan dan Perubahan Metabolit Sekunder Mayor Temulawak (Curcuma xanthorriza) Pada Umur Rimpang Yang Berbeda." Jurnal Jamu Indonesia 1, no. 1 (March 31, 2016): 10–17. http://dx.doi.org/10.29244/jji.v1i1.3.

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Penelitian ini dilakukan untuk mengevaluasi aktivitas antioksidan dan perubahan metabolit sekunder mayor temulawak (C. xanthorrhiza) pada umur rimpang yang berbeda. Aktivitas antioksidan ditentukan menggunakan tiga metode yaitu DPPH (1,1-difenil-1-pikrilhidrazil), FRAP (ferric reducing antioxidant power), dan CUPRAC (cupric ion reducing antioxidant capacity), sedangkan kadar kurkuminoid dan xantorizol ditentukan dengan metode KCKT. Hasil pengukuran aktivitas antioksidan, kadar kurkuminoid dan xantorizol menunjukkan semakin meningkat dengan bertambahnya umur rimpang temulawak. Analisis korelasi antara aktivitas antioksidan dan kadar kurkuminoid serta xantorizoldiperoleh bahwa kapasitas antioksidan yang diukur dengan metode DPPH dan FRAP mempunyai korelasi positif dengan nilai sebesar 0.757 r 0.996 dan 0.522 r 0.976 berturut-turut, sedangkan metode CUPRAC berkorelasi tinggi dengan jumlah rendemen (r = 0.986). Analisis spektrum IR pada sampel rimpang temulawak memberikan profil yang identik dengan perbedaan hanya pada nilai absorbansnya. Rimpang temulawak dengan umur 9 bulan memiliki detail spektrum IR yang lebih jelas dan nilai absorbans yang lebih tinggi dibandingkan dengan umur rimpang 7 dan 8 bulan. Evaluasi yang dilakukan dapat memberikan informasi mengenai mutu rimpang temulawak berdasarkan masa tanamnya.
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Djauhari Purwakusumah, Edy, Lusi Royani, and Mohamad Rafi. "Evaluasi Aktivitas Antioksidan dan Perubahan Metabolit Sekunder Mayor Temulawak (Curcuma xanthorriza) pada Umur Rimpang yang Berbeda." Jurnal Jamu Indonesia 1, no. 1 (March 31, 2016): 10–17. http://dx.doi.org/10.29244/jjidn.v1i1.30590.

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Penelitian ini dilakukan untuk mengevaluasi aktivitas antioksidan dan perubahan metabolit sekunder mayor temulawak (C. xanthorrhiza) pada umur rimpang yang berbeda. Aktivitas antioksidan ditentukan menggunakan tiga metode yaitu DPPH (1,1-difenil-1-pikrilhidrazil), FRAP (ferric reducing antioxidant power), dan CUPRAC (cupric ion reducing antioxidant capacity), sedangkan kadar kurkuminoid dan xantorizol ditentukan dengan metode KCKT. Hasil pengukuran aktivitas antioksidan, kadar kurkuminoid dan xantorizol menunjukkan semakin meningkat dengan bertambahnya umur rimpang temulawak. Analisis korelasi antara aktivitas antioksidan dan kadar kurkuminoid serta xantorizoldiperoleh bahwa kapasitas antioksidan yang diukur dengan metode DPPH dan FRAP mempunyai korelasi positif dengan nilai sebesar 0.757 r 0.996 dan 0.522 r 0.976 berturut-turut, sedangkan metode CUPRAC berkorelasi tinggi dengan jumlah rendemen (r = 0.986). Analisis spektrum IR pada sampel rimpang temulawak memberikan profil yang identik dengan perbedaan hanya pada nilai absorbansnya. Rimpang temulawak dengan umur 9 bulan memiliki detail spektrum IR yang lebih jelas dan nilai absorbans yang lebih tinggi dibandingkan dengan umur rimpang 7 dan 8 bulan. Evaluasi yang dilakukan dapat memberikan informasi mengenai mutu rimpang temulawak berdasarkan masa tanamnya.
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Brewster, Jeffrey D., and James L. Anderson. "On Absorbance Measurements in Spatially Inhomogeneous Fields." Applied Spectroscopy 43, no. 4 (May 1989): 710–14. http://dx.doi.org/10.1366/0003702894202427.

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The measured absorbance of a spatially inhomogeneous sample may be strongly affected by the relative spatial distribution of the absorbing medium and the optical beam. The measured absorbance is, in general, not the average of local absorbances across the beam, except when the maximum range of local absorbance values across the entire field is small (<0.1 AU). The measured transmittance of an optically inhomogeneous field is equal to the average transmittance only if incident intensity is everywhere uniform. The general problem is outlined and is illustrated by examples of transient spectroelectrochemical experiments monitoring the time course of reactant consumption or product generation as they traverse a thin optical beam parallel to the electrode.
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Fahselt, Dianne. "UV Absorbance By Thallus Extracts of Umbilicate Lichens." Lichenologist 25, no. 4 (October 1993): 415–22. http://dx.doi.org/10.1006/lich.1993.1005.

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AbstractEleven stands of umbilicate lichens exhibiting a range of variabilities in enzyme banding patterns were compared on the basis of the ultraviolet (UV)absorbing properties of thallus extracts. Stands of Umbilicaria veilea, which were some of the most variable enzymatically, had the lowest UV absorbancy in extracts, and stands of Lasallia papulosa, which were among the least variable enzymatically, showed more UV absorbance than others. Umbilicaria deusta, U. muhlenbergii and U. mammulata had intermediate levels of absorbance. Negative correlations (P = 005–007) were found between enzyme polymorphism and UV absorbance in the ranges 215–220, 269–271 and 304–305 nm. There was also a significant negative correlation at P = 003 between enzyme variability and thallus dry weight extractable with either ethanol or acetone.
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KUTLUYER, Filiz, BAŞAR ALTINTERİM, and ÖNDER AKSU. "Oksijen Radikal Absorbans Kapasitesi (ORAK) Seviyeleri Farklı Bitki Masere Yağlarının Yoğun Stoklanmış Gökkuşağı Alabalıklarının (Oncorhynchus mykiss) Bazı Kan Parametrelerine Etkileri." Atatürk Üniversitesi Veteriner Bilimleri Dergisi 13, no. 1 (April 25, 2018): 63–69. http://dx.doi.org/10.17094/ataunivbd.296703.

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Kroll, M. H., and R. J. Elin. "Molar absorptivity and the blank correction factor." Clinical Chemistry 31, no. 3 (March 1, 1985): 462–65. http://dx.doi.org/10.1093/clinchem/31.3.462.

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Abstract In photometry, where both the product formed and one or several reactants absorb light at the same wavelength, the absorbance of the "blank" of the sample at the end of the reaction may be less than that measured at the beginning of the reaction, because of consumption of reactant(s). The blank correction factor for the determined result with one light-absorbing reagent is epsilon P / (epsilon P - epsilon R), where epsilon R and epsilon P are the molar absorptivities of the reagent and the product, respectively. We derived a factor for the case when more than one reagent absorbs light at the same wavelength as the measured product. This factor is independent of the concentration of reagent(s) and can correct the determined result or absorbance for the consumption of light-absorbing reagent(s) during the reaction.
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Arunkumar, V., K. Krishnamurthy, C. Maheswari, B. Meenakshipriya, and R. Vinoth. "Removal of NOX from diesel engine exhaust by using different chemical absorbent in a lab-scale packed column system." Measurement and Control 52, no. 7-8 (June 24, 2019): 1095–101. http://dx.doi.org/10.1177/0020294019858167.

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Emissions of NOX from automobile causes various environmental impacts. In order to satisfy the emission norms and standards, it is necessary to reduce the toxic gases from emission. This paper concentrates on designing a packed column and analysis on the selection of an effective absorbent to reduce NOX emission from diesel engines. NOX emission is taken from the exhaust of diesel engine (Kirloskar TV1 Diesel engine). Flue gas inlet to the packed column and the treated gas at the outlet of the packed column are measured using NOX inlet and outlet gas sensors, respectively. Absorbent flow is carried out in a lab-scale packed column experimental setup. Various parameters of the packed column such as liquid: gas ratio, diameter, total height and packing height are determined based on the mathematical modeling. The NOX emission was experimentally measured with various combinations of different absorbents with different flow rate. Based on the experiments, effective absorbents are chosen as NaClO2 and NaOH. Experimental results show chemical absorbent combination with 0.5 M concentration of sodium chlorite and 0.3 M concentration of sodium hydroxide at 80% data acquisition card opening condition is absorbing NOX effectively.
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Dissertations / Theses on the topic "Absorbans"

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Nilsson, Sarah, and Sofia Wängdahl. "Reducering av DOC beroende av karaktär med fyra dricksvattenberedningstekniker : Jämförelse mellan fällning (FeCl3 och Al2(SO4)3), membranfiltrering och jonbyte med MIEX®." Thesis, Sveriges lantbruksuniversitet, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-231565.

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Halten löst organiskt material (DOC) har under de senaste 20 åren ökat i våra sjöar. Det har också skett förändringar i karaktären. DOC ställer till problem för vattenverk som använder ytvatten som dricksvattenkälla genom att det kan ge lukt, smak och färg till vattnet. Det ger också ett ökat behov av fällningskemikalier, större slambildning och större bildning av potentiellt skadliga desinfektionsprodukter. I och med förändringarna i halt och karaktär av DOC behöver nuvarande reningstekniker förbättras och nya tekniker utvecklas. I den här studien undersöktes två konventionella reningstekniker; fällning med järnklorid och fällning med aluminiumsulfat, samt två modernare tekniker; jonbyte med MIEX® och membranteknik. Sex olika vatten med extrema typer av DOC användes, såsom algogent vatten, avloppsvatten och myrvatten, för att få en stor spridning i SUVA (specifik UV254-absorbans). SUVA är kvoten mellan absorbansen vid 254 nm och DOC-halten och ger en indikation på fördelningen mellan alloktont och autoktont material. Analys av DOC, absorbans, fluorescensparametrar, anjoner och järn utfördes för att få en uppfattning av hur mycket och vilken typ av DOC som renades för respektive teknik. Membrantekniken hade generellt högre reducering av DOC än övriga reningstekniker. Genomgående renades alloktont material i högre utsträckning än autoktont material. Vatten med högt SUVA-värde (>3), alltså större andel alloktont material, var mer lättbehandlat än ett med lågt värde, men sambandet var inte linjärt. Algogent vatten renades dåligt med MIEX® och fällning men bättre med membran. Det fanns ett tydligt samband mellan absorbans (245 nm) och DOC-halt som gör det möjligt att med online-mätning av absorbans få fram tillräckligt noggranna värden på DOC-halter.
The amount of dissolved organic carbon (DOC) has risen in our lakes during the past 20 years and it has also changed in character. DOC causes problems for water treatment plants that are using surface water as a drinking water source. It gives the water odour, taste and colour. It also leads to a higher need of precipitation chemicals, more sludging, and larger formation of potentially harmful disinfection products. With the changes in both amount and character in DOC, current water treatment techniques need to be improved and new techniques developed. In this study, two conventional water treatment techniques; precipitation with iron chloride and precipitation with aluminium sulphate, and two more modern techniques; ion exchange with MIEX® and membrane filtration, were examined. Six waters with extreme types of DOC were used, including algogenic water, wastewater, and water from mire, in order to have a wide range of SUVA-values (specific UV254-absorbance). SUVA is the ratio between absorbance at 254 nm and the content of DOC. SUVA gives an indication about the distribution of allochthonous and autochthonous matter. In each water treatment technique analysis of DOC, absorbance, fluorescence parameters, anions, and iron were performed to gather information regarding how much and which type of DOC were reduced, in each water treatment technique. Membrane filtration had generally higher reduction of DOC compared to the other techniques. Allochthonous matter was reduced to a higher extent than autochthonous matter. Waters with a high value of SUVA (>3), which means a larger proportion of  allochthonous matter, was more easily treated than water with lower values, but the relation was not linear. DOC in algogenic water was poorly reduced with MIEX® and the precipitation techniques, but better reduced with the membrane filtration. There was a correlation between absorbance (254 nm) and the amount of DOC, which makes it possible to do online reading of absorbance and translate the values into amount of DOC.
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Lundstedt, Evert. "Adsorption av Sb på zeolit." Thesis, Växjö University, School of Technology and Design, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-1591.

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Detta examensarbete är en förundersökning till Glafos undersökning angående rening av glasbrukens processvatten från antimon med zeolit.

Förundersökningen gick ut på att via experiment ta reda på hur mycket antimon som adsorberas av behandlad (för optimering: dels med NaNO3 och dels med NaCl) och obehandlad zeolit (porstorlek 0.4 nm). pH mättes och ställdes eftersom det har betydelse för adsorptionen, åtminstone vid väldigt lågt pH. När lösningarna hade filtrerats mättes den kvarvarande antimonhalten med atomabsorptionsspektrofotometri. Mätningarna visade att i genomsnitt 53 % av Sb-halten i lösningarna hade adsorberats av zeoliten. Förundersökningen visade att det inte blir någon adsorption då pH är väldigt lågt (under 1). Den visade också att när pH är över 4 verkar det inte ha någon betydelse om zeoliten är behandlad eller inte.

Zeoliten bör behandlas med NaCl först i en tank med omrörning, sedan blandas i processvattnet (vars pH justerats till pH 4) i en tank eller bassäng och därefter filtreras.

Tidsfaktorn för hur lång tid det tar för zeoliten att nå jämvikt och temperaturens inverkan bör även undersökas.


The aim of this diploma work is to study the removal of antimony from glassworks process water using zeolites.

The experimental part of the studies were carried out to find the quantity of antimony adsorbed by the zeolite. The studies included treated (for optimization: partly with NaNO3 and partly with NaCl) and untreated zeolite. The pore size is 0.4 nm. pH was measured and adjusted because it is important for the antimony adsorption. When the solutions were filtrated the content of antimony left was measured with atomic absorption spectrophotometry. The measurements showed an average uptake of antimony by the zeolite of 53 %.The preinvestigation indicates that with a very low pH (below 1) there is no antimony adsorption. It also indicates that with pH above 4 it does not matter if the zeolite are treated or not.

In further investigations the zeolite should be treated with NaCl in a stirred tank, then be mixed in the process water (pH is set to 4) in a tank or basin and then be filtrated.

The time to reach equilibrium and the influence of temperature should also be investigated.

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Tirén, Ström Julia. "Utvärdering av processen vid Hofors vattenverk med avseende på avskiljning av NOM – fällning och membranfilterteknik." Thesis, Institutionen för vatten och miljö, Geokemi och hydrologi, Sveriges lantbruksuniversitet, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-292673.

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De senaste årtiondena har en ökning av naturligt organiskt material (NOM) observerats i ytvatten i norra Europa och Nordamerika. NOM i vattnet innebär utmaningar för vattenverk som använder ytvatten i dricksvattenproduktionen då det kan ge upphov till lukt, smak och färg och svårigheter i driften. För att åtgärda och förebygga problemen behövs mer kunskap om NOM samt hur kvantiteten och sammansättningen förändras i olika reningsprocesser. Vid Hofors vattenverk används råvatten från sjön Hyen i dricksvattenproduktionen. Driftstörningar upplevs i perioder då råvattnets färgtal (mått på halten NOM) är högt. Därför undersöktes det hur väl den nuvarande reningsprocessen vid Hofors vattenverk fungerar med avseende på avskiljning av NOM samt vilken typ av NOM som avskiljs. Resultaten jämfördes med pilotförsök med direktfällning på ultrafiltermembran för att se om detta kan ge bättre avskiljning. Olika analysmetoder, absorbans, fluorescens och mätning av löst organiskt kol (DOC), användes för att avgöra kvantitet och karaktär på NOM i vattenproverna. Även eventuell förekomst av trend i råvattnets färgtal undersöktes. Likt i många andra ytvatten har färgtalet i Hyen har ökat de senaste åren (1997-2015). Råvattnet är svårfällt och innehåller en blandning av olika NOM-fraktioner. Huvudsakligen avskiljs humuslikt, alloktont NOM i Hofors vattenverk. Avskiljningen var störst i första reningssteget, direktfällning på sandfilter. Förändringen i efterföljande reningssteg, kolfilter samt desinfektions- och pH-höjande steg, var dock svår att bestämma till följd av mycket små förändringar och motsägande analysresultat. Tre ultrafiltermembranförsök gav liknande avskiljningsresultat som sandfilter, men i två av fallen är det troligt att igensättning av membranen spelade in. Det krävs ytterligare försök för att säkert uttala sig om huruvida ultrafiltermembran är en teknik som är lämplig att använda vid Hofors vattenverk i framtiden för avskiljning av NOM.
In recent decades, an increase in natural organic matter (NOM) has been observed in surface waters in Northern Europe and North America. NOM in the water poses challenges for water treatment plants (WTP) using surface water in the drinking water production. It can cause odor, taste and color of the water and cause difficulties in the treatment process. To prevent all these problems, more information about NOM and how the quantity and composition changes in various treatment processes is needed. At Hofors WTP, raw water from the lake Hyen is used in the production of drinking water. Disruptions in running the process have been experienced in periods when the raw water color (measure of the NOM content) has been high. In this thesis, it was investigated how well the current treatment process at Hofors WTP works with respect to the separation of NOM and what type of NOM that is separated. The results were compared with pilot tests with direct filtration using an ultrafilter membrane to see if this can provide better separation. Various analytical methods as absorbance, fluorescence and measurement of dissolved organic carbon (DOC) were used to quantify and determine the composition of NOM in the water samples. It was also examined whether there is a trend in the raw water color. As in many other surface waters the color of the water has increased in Hyen in recent years (1997-2015). The raw water contains a mixture of different NOM fractions and the character indicates difficulties in removing DOC by coagulation and flocculation. It is primarily the humic like, allochtonous NOM that is separated in the treatment process with the greatest separation in the first treatment step, direct filtration with sand filter. What happens in the subsequent treatment steps, carbon filter, disinfection and pH-raising step, was however unclear due to small changes and inconsistent analysis results. Three experiments with ultrafilter membrane yielded similar results as sand filters, but in two of the cases it is likely that clogging of the membranes contributed. Further membrane pilot tests are needed to be sure whether ultrafilter membrane is a is suitable technique to use at Hofors WTP in the future for separation of NOM.
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Johansson, Oskar. "Avskiljning av naturligt organiskt material vid konstgjord grundvattenbildning i Uppsalaåsen." Thesis, Sveriges Lantbruksuniversitet, Institutionen för Vatten och Miljö, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-269529.

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Uppsalas dricksvattenförsörjning baseras på konstgjord grundvattenbildning som innebär att vatten från Fyrisån får rinna ned till grundvattnet från infiltrationsbassänger. Detta examensarbete syftar till att undersöka vad som händer med naturligt organiskt material (NOM) i Uppsalaåsen vid konstgjord grundvattenbildning. De viktigaste processerna för minskning av NOM är biologisk avskiljning genom nedbrytning, fysikalisk-kemisk avskiljning genom sorption till metalloxider samt utspädning genom inblandning av naturligt grundvatten. Arbetet bestod av tre delar: 1) analys av vattenkemidata från grundvattenprover, 2) analys av extraktion av TOC, Al och Fe från jordprover för att undersöka utfällning av NOM med metalloxider samt 3) ett inkuberingsexperiment för att utvärdera potentialen för biologisk nedbrytning i löst organiskt material (DOC). Jordproverna hämtades från borrkärnor som tagits på fem platser längs åsen under sommaren 2014. Grundvattenprover togs i 19 brunnar minst en gång per månad från november 2014 fram till april 2015. TOC-halten i grundvattnet är som högst vid infiltrationsbassängerna, ca 15 mg/l. TOC- minskar med 30 % de första 200 metrarna i flödesriktningen men minskningen avtar under grundvattentransporten. I den omättade zonen avskiljs mindre än 10 %. Vattnet i Fyrisån har en varierande sammansättning över ett år, vilket också observerades i provtagningspunkter som ligger närmast infiltrationsanläggningarna. Analys av uran och stabila isotoper visar att dispersion i åsen utjämnar dessa variationer. Analys av UV-absorbans och fluorescens tyder på att det organiska materialet i grundvattnet byter karaktär i den mättade zonen och blir hydrofilt. Resultaten från extraktionerna i jordprover visar på god korrelation mellan Fe och TOC. Bidning till järnoxider antas därför vara den viktigaste avskiljningsmekanismen i åsen. Resultaten indikerar på anrikningar av humuskomplex i de ytligaste jordlagren under sandfiltren samt precis under grundvattenytan i närheten av bassängerna. Inkuberingsexperimentet utfördes genom att grundvatten från fem olika provpunkter sterilfiltrerades. 15 vattenprover tillsattes med inockulat innehållande mikroorganismer och övriga 15 sterila prover användes som referenser. TOC undersöktes varannan vecka på samtliga vattenprover under 1,5 månader. Efter två veckor minskade halten TOC i samtliga prover och referenser med cirka 25 % och var därefter relativt konstant. Sammanfattningsvis sker en snabb minskning av NOM i grundvattnet nära infiltrationsbassängerna. Det antas bero på adsorption till metalloxider och fasta partiklar och biologisk nedbrytning. Minskningstakten av NOM avtar med transportsträckan. Längre bort antas inblandning av naturligt grundvatten vara den viktigaste orsaken till att halten NOM minskar.
The drinking water supply in Uppsala is based on this technique which involves surface water from Fyrisån percolating to the ground water through an infiltration basin. This master thesis aims to evaluate the fate of natural organic matter (NOM) in the Uppsala esker during artificial groundwater recharge. The most important processes for the removal of NOM are biological degradation, physical-chemical sorption to metal complexes and dilution by mixing with natural ground water. The work consisted of three parts: 1) analysis of water chemistry data from groundwater samples, 2) analysis of extractions of TOC, Al and Fe from soil samples to evaluate deposition of NOM with metal oxides, and 3) an incubation test to evaluate the potential for biological degradation in dissolved organic carbon (DOC). Soil samples were collected from drill cores taken from five locations along the Uppsala esker in the summer of 2014. Ground water was sampled in 19 wells at least once every month from November 2014 to April 2015. The levels of TOC in ground water are highest at the infiltration basins, about 15 mg/l. The TOC levels drop by 30 % the first 200 meters in the flow direction, but the removal rate decreases during the ground water transport. Less than 10 % is removed in the unsaturated zone. The water in Fyrisån has a variation in composition during a year, which is also observered in sampling points close to the infiltration basins. Analysis of uranium and stable isotopes shows that dispersion in the esker evens these variations. The analysis of absorbance and fluorescence shows that the NOM changes character in the saturated zone and becomes less humificated and becomes hydrophilic. The results from the extractions in the soil samples show a good correlation between Fe and TOC. Complexes of NOM and iron oxides are thought to be the most important complex in the Uppsala esker. The extractions also indicate that enrichments of humus complexes in the uppermost soil of the infiltration basins and right below the ground water table in several locations near the basins. The incubation test was done by sterilization filtering of ground water from five different locations. Inoculate with microorganisms was added to 15 of these samples, while 15 without inoculate was used as reference samples. Analysis of TOC was done every two weeks during 1,5 months. The levels of TOC decreased by 25 % after two weeks in all samples and reference samples, and were stable afterwards. In summary, a quick decrease of NOM occurs in the groundwater close to the infiltration basins. This is mainly caused by sorption and biological degradation. The removal rate of NOM decreases with distance. Further away from the basins, the most important process for decrease of NOM is mixing with local ground water.
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Fneich, Zeinab. "La conception et la réalisation des absorbeurs en utilisant des métamatériaux." Thesis, Normandie, 2020. http://www.theses.fr/2020NORMR095.

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Dans cette thèse, nous visons à concevoir des absorbants à larges bandes passantes pouvant fonctionner efficacement même en basses fréquences. Pour atteindre un tel objectif, nous profitons des propriétés des métamatériaux pour réaliser des dispositifs capables de remplacer les technologies actuelles d’absorbants destinés à des utilisations dans les chambres anéchoïques par exemple. Après avoir étudié l'état de l'art de l'absorbant à base de métamatériaux, nous avons choisi la conception pyramidale comme base de notre recherche eu égard à ses propriétés adaptées à notre application. Nous effectuons une étude paramétrique complète pour ajuster ses paramètres géométriques et les propriétés des matériaux afin d'obtenir la meilleure réponse en terme d’absorption. En outre, nous améliorons sa bande passante d'absorption relative en créant une nouvelle conception avec altitude incurvée. Ces optimisations conduisent à une augmentation de la bande passante d'absorption relative (RAB) trouvée dans les littératures récentes de 63,3% à 73,4% avec un niveau d'absorption supérieur à 80%. Dans ce travail, nous nous nous intéressons également aux contraintes de conception en basses fréquences. Pour répondre aux exigences de dimensionnement à ces fréquences nous nous orientons vers des matériaux diélectriques avec des permittivités relatives élevée afin de réduire l’encombrement de ces structures. Après avoir appliqué ces choix de matériaux, nous avons réussi à déplacer la fréquence vers les bandes UHF. Nous avons réalisé des cellules unitaires miniaturisées en appliquant une géométrie de surface minimale en tant que nouvelle méthode de miniaturisation des absorbants. De plus, pour élargir l'absorption de l'absorbant pyramidal conventionnel, nous présentons différents nouveaux prototypes. Nous citons le prototype d'une épaisseur totale de 12,7 cm, composé de 35 couches résonantes incurvées où les simulations numériques montrent une conception améliorée avec une bande d'absorption totale allant de 0,3 GHz à 30 GHz. Concernant le deuxième prototype proposé, ce dernier est composé, dans une maille élémentaire, de l’association d’absorbants opérants sur des bandes complémentaires et à base de la structure pyramidale. Après avoir introduit de nombreux facteurs d'amélioration et avoir réalisé plusieurs étapes d'optimisation, ce dernier prototype nous a permis d’atteindre une bande passante d'absorption relative de 128,69%. Tous ces prototypes sont conçus et étudiés à l'aide du simulateur numérique High-Frequency Structure Simulator (HFSS). Tous les calculs ont été effectués sur un HPC de 24 cœurs avec une mémoire système de 192 Go de RAM. Pour la fiabilité des résultats, le mode d'analyse fréquentielle en mode discret a été paramétré avec de nombreux points de fréquences pour atteindre des résultats de simulation avec un très haut niveau de précision
In this thesis, we aim to design a broadband absorber that can effectively operate at low frequencies. To achieve such an aim, we take advantage of the properties of the metamaterial to reach a stage in which the former is capable of replacing the present bulky anechoic chamber. After studying the state of the art of metamaterial absorber, we choose the pyramidal design to be the basis of our research view of its suitable properties for our application. We perform a complete parametric study to adjust its geometrical parameters and material properties to obtain the best absorption response. Besides, we enhance its relative absorptive bandwidth by making a novel curved altitude design. The latter two modifications lead to an increase in the Relative Absorptive Bandwidth (RAB) from 63.3% in the literature to 73.4% with an absorption level greater than 80%. In addition, we discuss the requirements needed to reach a low-frequency band absorber that can be summarized by the necessary high relative permittivity material dielectric substrate and the need for bigger dimensions. After applying these requirements, we succeeded to shift the frequency to UHF bands. We achieved a miniaturized unit cells by applying minimal surface geometry as a novel way in miniaturizing absorber. Moreover, to widen the broadband absorption of the conventional pyramidal absorber, we present different new absorber prototypes. We cite the prototype with a total thickness of 12.7 cm, consisting of 35 curved resonant layers where numerical simulations show an enhanced design with an absorption band from 0.3 GHz to 30 GHz. Concerning the second proposed prototype, the latter is dedicated to combining complementary bands for different pyramidal structures dimensions in one unit cell. After introducing many enhancement factors and taking into account optimization, this prototype reached a well-combined band with a relative absorptive bandwidth of 128.69%. These prototypes are tested using the numerical simulator High-Frequency Structure Simulator (HFSS). All calculations were performed on an HPC of 24 cores with a system memory of 192 GB RAM. For the reliability of the results, discrete frequency analysis mode was adjusted with numerous data points to reach simulation results with a very high level of precision
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Ahmed, Masud Omar. "Teststation för industriella UV-celler." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-165036.

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GE Healthcare Bio-Sciences AB in Umeå produce a variety of chromatography systems. One of the main components in chromatography is the UV module, which measure the light absorption of different wavelengths in the liquid being pumped through a cell. Currently at the Umeå site two types of UV-cells are produced; lab cells and industrial cells. The current test station for the industrial UV-cells is outdated, in disrepair and no longer supported.  GE has developed a test station for the lab cells that evaluates UV and flow properties, the data is stored in GE’s own production database, Prodas. The aim of this work is to design a test station for industrial UV-cells to improve the quality of the cells. The primary goal is a test station that can measure pressure, flow and absorption. The secondary goal is to discover and if possible, implement solutions that will streamline and automate the test station. A prototype of a test station for industrial UV-cells based on that for lab cells has been developed. The solution consists of an adapter that links the light path from the monitor through the UV-cell to the detector. The test station can measure pressure, flow and absorption but can only perform absorption and leakage tests.  Automation and efficiency have been accomplished in the form of scripts used to conduct absorption and leakage tests. The test station requires further development before it can be used in the production line.
GE Healthcare Bio-Sciences AB i Umeå tillverkar ett flertal system, ett av systemen är vätskekromatografen. Vätskekromatografen är en kemisk separationsmetod som använder sig av en UV-monitor, UV-detektor och en UV-cell för att mäta absorptionen av en lösning och framta koncentrationen av det eftersökta ämnet. På anläggningen i Umeå tillverkas två typer av UV-celler; laborationceller och industriceller. För labbcellerna har GE utvecklat en teststation som testar och utvärderar UV och flödesegenskaper samt lagrar data i GE:s egen produktionsdatabas, Prodas. Den befintliga stationen för industriceller är äldre och omodern, en utveckling behövs för att upprätthålla högre kvalité. Syftet med detta projekt är att uppdatera teststationen för industriella UV-celler till samma nivå som stationen för laborationsceller. Det primära målet är att konstruera och designa en teststation för industriella UV-celler som kan mäta tryck, flöde och absorption. Det sekundära målet är att upptäcka och om möjligt verkställa lösningar som kommer effektivisera och automatisera mätningarna. En prototyp av en teststation för industriella UV-celler baserat på den för laborationceller har framtagits, och består av en adapterlösning som används för att sammanlänka ljusbanan från monitorn genom flödescellen till detektorn. Prototypen kan enbart utföra absorption och läckagemätningar. Automatisering och effektivisering har utförts i form av scripts som används för att genomföra absorptions och läckagemätning. Teststationen kräver fortsatt vidareutveckling innan den kan används i produktionslinjen.
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Baccarelli, Isabella. "Photodissociation et association radiative des molécules interstellaires." Paris 6, 2005. http://www.theses.fr/2005PA066181.

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Oyharçabal, Mathieu. "Synthèse, formulation, et mise en oeuvre de nanomatériaux conducteurs base poly(aniline) / nanotubes de carbone pour des applications micro-ondes." Thesis, Bordeaux 1, 2012. http://www.theses.fr/2012BOR14633.

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Ces travaux de thèse consistent à formuler des nanocomposites électriquement conducteurs pour des applications micro-ondes. L’objectif principal est la mise en œuvre de matériaux absorbant les ondes radar, plus particulièrement sur la bande X (8-12 GHz). La polyaniline et les nanotubes de carbone, dispersés dans une matrice époxyde, ont été sélectionnés pour apporter les propriétés d’absorption aux fréquences visées. Différentes morphologies de polyaniline ont été synthétisées afin d’étudier leur influence sur les propriétés d’absorption des composites. L’utilisation d’une polyaniline à morphologie feuillet, présentant une forte anisotropie et un facteur de forme élevé, permet d’augmenter la conductivité et les pertes diélectriques des composites. De plus, leur association avec des nanotubes de carbone améliore significativement les propriétés d’absorption aux fréquences micro-ondes. Des écrans absorbants radar performants qui présentent des coefficients de réflexion inférieurs à -20 dB ont pu être modélisés et mis en œuvre, confirmant le potentiel de ces matériaux pour des applications de furtivité radar
This thesis deals with the formulation of electrically conductive nanocomposites for microwave applications. The main purpose is to process radar-absorbent materials, more particularly at the X band. (8-12 GHz). Polyaniline and carbon nanotubes, dispersed in an epoxyde matrix, have been selected. Different morphologies of polyaniline have been synthesized to study its impact on the absorption properties of composites. Using flake-like polyaniline showing high anisotropy and aspect ratio increases conductivity and dielectric losses of composites. Moreover, its association with carbon nanotubes significantly improves the absorption properties at microwaves frequencies. Efficient radar absorbing screens, showing reflection losses lower than -20 dB, have been calculated and processed confirming the potential of these materials for stealth applications
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Jung, Woo-Ram. "Absorbing Darkness." Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/35395.

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Beams of light can create volumes of darkness that help define an experience. That is an experience of darkness. Light and darkness in the enclosed space make me respond to myself. It is a canyon empty of everything, yet filled with the total absence of light. And the quality of this darkness is uniquely bewildering, what's more, a thick and viscous mass of black air that seems to brush against your face, limitless and seething. It is darkness visible. Darkness forces me to be isolated from the world. Without any external input, I start to talk to and hear from myself. As well as, I start to feel my body from top to toe with all senses except for the sense of sight. It goes slowly, and the interaction with myself, which is experiencing darkness, puts my mind in calm. In that level of calm, the experience of darkness wanes as we adjust to the environment, gradually becoming aware of people and walls and even faint shadows. This project is an attempt at designing spaces that allows a person to be absorbed in darkness.
Master of Architecture
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Diaz, Mendoza Alvaro. "Conception of a fibrous composite material for the retention of heavy metals." Thesis, Lyon, 2020. http://www.theses.fr/2020LYSEI125.

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La contamination par les métaux lourds est un problème actuel qui affecte les écosystèmes et leurs organismes constitutifs. Ce problème a été reconnu dans le monde entier comme l'un des plus grands défis de notre époque. Depuis le milieu du siècle dernier, les innovations dans le domaine de la science des matériaux ont permis de mettre au point de nouvelles méthodes pour faire face à ce risque, avec des techniques telles que la précipitation chimique ou la flottation. Toutefois, il reste encore beaucoup à faire dans ce domaine. En outre, des recherches récentes ont exploré comment combiner des biomolécules telles que les protéines avec des matériaux tels que les polymères pour créer des solutions plus actives. Ce travail de thèse vise à créer un prototype de matériau adsorbant hybride capable de capturer spécifiquement les ions métalliques divalents Ni(II), Cd(II) et Pb(II) grâce à la présence d'une métalloprotéine synthétique dans sa structure. Pour atteindre cet objectif, le travail de thèse se concentre sur le développement d'une métalloprotéine synthétique capable de capturer spécifiquement les trois ions métalliques cibles, de la conception in silico à sa synthèse in vivo. D'autre part, le support de matériau est traité avec la technique d'électrofilage qui consiste en un matériau membranaire fibreux, étant optimisé pour accueillir la métalloprotéine synthétique dans sa structure. En outre, une méthode permettant d'intégrer la métalloprotéine dans le support polymère est recherchée. Ceci est réalisé au moyen d'une voie de greffage à travers des nanoparticules de silice modifiées en surface. À la fin, l'intégration des deux composants crée le prototype attendu de matériau biosorbant synthétique. Ce matériau a été caractérisé afin d'évaluer sa capacité à adsorber les trois ions métalliques d'intérêt, ce qui permet de dégager certaines tendances des perspectives futures de développement pour créer des matériaux plus efficaces pour l'industrie
Heavy metal contamination is a current problem which affects the ecosystems and their constituent organisms. This problem has been worldwide recognized as one of the biggest challenges of our time. Since the middle of the last century, innovations in the material science field have developed new methods to confront this risk, with techniques such as chemical precipitation or flotation. However, there is still significant room for improvement in this line. Furthermore, recent research has explored how to combine biomolecules such as proteins with materials like polymers to create more active solutions. This thesis work seeks to create a prototype hybrid biosorbent material capable to capture specifically the divalent metal ions Ni(II), Cd(II) and Pb(II) thanks to the presence of a synthetic metalloprotein in its structure. To address this objective, the thesis work focuses on the development of a synthetic metalloprotein capable to specifically capture the three target metal ions, from the in silico conception to its in vivo synthesis. On the other hand, the biosorbent material support is processed with the electrospinning technique that consists of a fibrous membrane material, being optimized to host the synthetic metalloprotein in its structure. Additionally, a method to integrate the metalloprotein into the polymeric support is researched. This is achieved by means of a grafting route through surface modified silica nanoparticles. At the end, the integration of both components creates the expected prototype synthetic biosorbent material. This material has been characterized to evaluate its capacity to adsorb the three metal ions of interest, providing some trends of the future perspectives for further development to create more efficient materials for the industry
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Books on the topic "Absorbans"

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Idel, Moshe. Absorbing Perfections. New Haven: Yale University Press, 2008.

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The absorbent mind. New York: Delta, 1989.

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The absorbent mind. New York: Henry Holt, 1995.

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Matsuoka, Masaru, ed. Infrared Absorbing Dyes. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4899-2046-1.

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Vinoy, K. J., and R. M. Jha. Radar Absorbing Materials. Boston, MA: Springer US, 1996. http://dx.doi.org/10.1007/978-1-4613-0473-9.

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Baigent, Beryl. Absorbing the dark: Poems. Goderich, Ont: Moonstone Press, 1990.

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Lampe, Anthony, and Kristi Lampe, eds. Peacemaker: The Absorbing Rock. USA: Createspace, 2013.

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Cox, Trevor J. Acoustic Absorbers and Diffusers. London: Taylor & Francis Group Plc, 2004.

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Komarov, Vladimir Semenovich. Struktura i poristostʹ adsorbentov i katalizatorov. Minsk: "Nauka i tekhnika", 1988.

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Bastiere, Annie. Elaboration d'une methode d'aide a la decision pour la realisation de materiaux absorbants radar. Chatillon, France: Office national d'etudes et de recherches aerospatiales, 1989.

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Book chapters on the topic "Absorbans"

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Gooch, Jan W. "Absorbance." In Encyclopedic Dictionary of Polymers, 5. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_59.

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Gooch, Jan W. "Absorbance." In Encyclopedic Dictionary of Polymers, 871. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_13033.

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Macdonald, James W. "Absorbers." In Air Pollution Control Equipment, 45–71. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-85144-5_3.

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Matsui, Fumio. "Optical Recording Systems." In Infrared Absorbing Dyes, 117–40. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4899-2046-1_10.

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Nagae, Yoshiharu. "Thermal Writing Displays." In Infrared Absorbing Dyes, 141–54. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4899-2046-1_11.

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Kakuta, Atsushi. "Laser Printer Application." In Infrared Absorbing Dyes, 155–71. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4899-2046-1_12.

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Suzuki, Yoshiaki. "Laser Filter Systems." In Infrared Absorbing Dyes, 173–82. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4899-2046-1_13.

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Tani, Tadaaki, and Yuji Mihara. "Infrared Photography." In Infrared Absorbing Dyes, 183–92. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4899-2046-1_14.

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Sternberg, Ethan, and David Dolphin. "Medical Applications." In Infrared Absorbing Dyes, 193–212. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4899-2046-1_15.

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Matsuoka, Masaru. "Synthetic Design of Infrared Absorbing Dyes." In Infrared Absorbing Dyes, 7–17. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4899-2046-1_2.

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Conference papers on the topic "Absorbans"

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Mao, Yen-Chieh, and Wei-Chih Chang. "Dynamic Modeling and Fluid-Structure Interactive Analysis of an Innovative Self-Tuning Shock Absorber for the Prosthesis Knee Joint." In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-38669.

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The above-knee prosthesis, as a supplement of the lost biological leg, is supposed to provide equivalent or enhanced shock absorption capability and reduce the shock waves on the amputee body when walking and running. Prosthesis knee joint with a shock absorber is a feasible solution that efficiently absorbs the impact loads during each heel-strike. Conventional shock absorbers consist of springs and dampers with constant coefficients produce excessive rigid reactions when encountering impact forces, while unreasonable weak responses for gentle loads. This study proposes an innovative viscous damper design for the prosthesis knee joint which automatically and smoothly tunes the damping coefficient without any electronic components according to the input force velocities. High order differential system of the shock absorber is constructed and simulates the system dynamics during cyclic loads. The fluid-structure interactive finite element model for key components in the absorber is established in this study. Design parameters of the damper system under certain absorbing performance requirements are determined in this paper.
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Zhao, Yi, Shuang-Chen Ma, and Xiao-Jun Sun. "Mechanism Study and Influence Factors Analysis of Desulphurization in Flue Gas Circulating Fluidized Bed." In ASME 2005 Power Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/pwr2005-50309.

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At present Flue Gas Desulphurization by Circulating Fluidized Bed (CFB FGD) has been widely used to partly take the place of the Spray Dry Absorbers (SDA) due to its simple system, excellent performance, occupying less area, and less cost, etc. It has been considered internationally as one of the most promising FGD technologies. The mechanism of FGD in CFB is introduced in the paper. Based on the mass transfer theory of two-phases, the fundaments of absorption and adsorption in CFB are analyzed. The influence of particle attrition on mass transfer coefficient of liquid phase is analyzed in terms of the special phenomenon in CFB. The result indicates that abrasion is beneficial to completely utilization of absorbents and further absorption, and it also has an inconspicuously enhanced effect on mass transfer. Fine particle agglomeration is analyzed in the paper and the study results show that the main course of FGD in CFB is absorbing process. Based on the gas absorption, the key parameters that influence desulphurization efficiency are analyzed finally. Mechanism study and influence factors analysis of FGD in CFB could be provided as the references for improving desulphurization.
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Delpech, Marc. "Besoins en anti-réactivité et rôles des moyens de contrôle, Pilotage." In Contrôle de la réactivité et absorbants neutroniques. Les Ulis, France: EDP Sciences, 2016. http://dx.doi.org/10.1051/jtsfen/2016con01.

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Laville, Cédric. "Besoins en anti-réactivité et rôles des moyens de contrôle, Sûreté." In Contrôle de la réactivité et absorbants neutroniques. Les Ulis, France: EDP Sciences, 2016. http://dx.doi.org/10.1051/jtsfen/2016con02.

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Dolci, Florence. "Modélisation et simulation." In Contrôle de la réactivité et absorbants neutroniques. Les Ulis, France: EDP Sciences, 2016. http://dx.doi.org/10.1051/jtsfen/2016con03.

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Grenèche, Dominique. "Genèse : premières réalisations." In Contrôle de la réactivité et absorbants neutroniques. Les Ulis, France: EDP Sciences, 2016. http://dx.doi.org/10.1051/jtsfen/2016con04.

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Plancher, Johann, and Songhui Zheng. "Principaux types de réacteurs et spécificités REL." In Contrôle de la réactivité et absorbants neutroniques. Les Ulis, France: EDP Sciences, 2016. http://dx.doi.org/10.1051/jtsfen/2016con05a.

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Gosset, Dominique. "Matériaux." In Contrôle de la réactivité et absorbants neutroniques. Les Ulis, France: EDP Sciences, 2016. http://dx.doi.org/10.1051/jtsfen/2016con08.

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Capitaine, Alain. "Principaux types de réacteurs et spécificités REL." In Contrôle de la réactivité et absorbants neutroniques. Les Ulis, France: EDP Sciences, 2016. http://dx.doi.org/10.1051/jtsfen/2016con05b.

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Laureau, Axel. "Le cas particulier des réacteurs à sels fondus." In Contrôle de la réactivité et absorbants neutroniques. Les Ulis, France: EDP Sciences, 2016. http://dx.doi.org/10.1051/jtsfen/2016con09.

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Reports on the topic "Absorbans"

1

Shneyderman, YA A. Radio-Absorbing Materials. Fort Belvoir, VA: Defense Technical Information Center, July 1985. http://dx.doi.org/10.21236/ada157496.

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Harrison, Richard W., Walter M. Madigosky, and Basil Vassos. Sound Absorbing Acoustic Horns. Fort Belvoir, VA: Defense Technical Information Center, March 1986. http://dx.doi.org/10.21236/ada212831.

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Lee, Hung-Mou, and Chen-Kuo Yu. A Theorem of Anisotropic Absorbers. Fort Belvoir, VA: Defense Technical Information Center, March 1997. http://dx.doi.org/10.21236/ada323831.

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Hahn H., I. Ben-Zvi, R. Calaga, L. Hammons, V. N. Litvinenko, and W. Xu. Energy Recovery Linac: HOM Absorbers. Office of Scientific and Technical Information (OSTI), January 2010. http://dx.doi.org/10.2172/1061952.

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Stoldt, Conrad, Michael H. Stowell, Zoya Popovic, Albert P. Pisano, and David C. Walther. Radar Absorbing Colloidal Solutions (RACS). Fort Belvoir, VA: Defense Technical Information Center, August 2007. http://dx.doi.org/10.21236/ada474806.

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Neuffer, D., D. Summers, T. Mohayai, P. Snopok, and C. Rogers. Use of Wedge Absorbers in MICE. Office of Scientific and Technical Information (OSTI), March 2017. http://dx.doi.org/10.2172/1354869.

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Stinson, Eric A. Metamaterial Resonant Absorbers for Terahertz Sensing. Fort Belvoir, VA: Defense Technical Information Center, December 2015. http://dx.doi.org/10.21236/ad1009293.

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Haberman, Michael R., Carolyn C. Seepersad, Preston S. Wilson, Kim Alderson, Andrew Alderson, and Fabrizio Scarpa. New Solutions for Energy Absorbing Materials. Fort Belvoir, VA: Defense Technical Information Center, November 2012. http://dx.doi.org/10.21236/ada582743.

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Edwards, Sebastian, and Eduardo Levy Yeyati. Flexible Exchange Rates as Shock Absorbers. Cambridge, MA: National Bureau of Economic Research, July 2003. http://dx.doi.org/10.3386/w9867.

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Hahn, H., I. Ben-Zvi, R. Calaga, L. Hammons, V. N. Litvinenko, and W. Xu. R&D ERL: HOM Absorbers. Office of Scientific and Technical Information (OSTI), January 2010. http://dx.doi.org/10.2172/1013446.

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You might also be interested in the extended bibliographies on the topic 'Absorbans' for particular source types:
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