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Journal articles on the topic 'Absorption'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Pulungan, Ainil Fithri, Effendy DLP., and Siti MS. "Simultaneous Spectrophotometric Determination of Paracetamol, Propyphenazone and Caffeine By Using Absorption Ratio Method." Asian Journal of Pharmaceutical Research and Development 6, no. 5 (2018): 5–8. http://dx.doi.org/10.22270/ajprd.v6i5.412.

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The Absorption Ratio method involves measuring the absorbance at two wavelengths, namely the iso-absorptive point and the maximum wavelength. Its method could be an option in determining the level of a drug. The aim of this study was to determine whether the absorption ratio method can be used to determine the levels of paracetamol (PCT), propyphenazone (PRO) and caffeine (CAF) in tablet form. The absorption ratio method was used to determine the levels of the mixed drug compound without the separation stage and using the maximum wavelength and iso-absorptif point. The result of the study show

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2

Li, Ming Fu, Zhi Kai Zhuang, Jin Zhang, et al. "Study on Undegummed Pineapple Leaf Fibers’ Moisture Absorptions." Advanced Materials Research 1048 (October 2014): 66–71. http://dx.doi.org/10.4028/www.scientific.net/amr.1048.66.

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Programmable constant-temperature/humidity test chamber owned by Natural Fiber Laboratory, Institute of Agricultural Machinery, Chinese Academy of Tropical Agricultural Sciences, is adopted to analyze undegummed pineapple fibers’ moisture absorptions. Study and analysis on moisture absorptions, moisture-absorption isothermsand moisture-absorption isohumes with constant temperature and inconstant humidities are carried out and the results show that fibers’moisture absorptions present roughly a regularity of such three stages as 0~20%, 20~80% and 80~100% (RH). In low-moisture stage, moisture abs

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3

Pongayi Ponnusamy Selvi and Rajoo Baskar, Pongayi Ponnusamy Selvi and Rajoo Baskar. "Mass Transfer Enhancement for CO2 Absorption in Structured Packed Absorption Column." Journal of the chemical society of pakistan 41, no. 5 (2019): 820. http://dx.doi.org/10.52568/000803/jcsp/41.05.2019.

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The acidic gas, Carbon dioxide (CO2) absorption in aqueous ammonia solvent was carried as an example for industrial gaseous treatment. The packed column was provided with a novel structured BX-DX packing material. The overall mass transfer coefficient was calculated from the absorption efficiency of the various runs. Due to the high solubility of CO2, mass transfer was shown to be mainly controlled by gas side transfer rates. The effects of different operating parameters on KGav including CO2 partial pressure, total gas flow rates, volume flow rate of aqueous ammonia solution, aqueous ammonia

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4

Kulish, M. R. "Influence of absorption saturation on the shape of CdSe absorption edge." Semiconductor Physics Quantum Electronics and Optoelectronics 17, no. 4 (2014): 349–52. http://dx.doi.org/10.15407/spqeo17.04.349.

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5

Lampel, Johannes, Johannes Zielcke, Stefan Schmitt, et al. "Detection of O<sub>4</sub> absorption around 328 and 419 nm in measured atmospheric absorption spectra." Atmospheric Chemistry and Physics 18, no. 3 (2018): 1671–83. http://dx.doi.org/10.5194/acp-18-1671-2018.

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Abstract. Retrieving the column of an absorbing trace gas from spectral data requires that all absorbers in the corresponding wavelength range are sufficiently well known. This is especially important for the retrieval of weak absorbers, whose absorptions are often in the 10−4 range. Previous publications on the absorptions of the oxygen dimer O2–O2 (or short: O4) list absorption peaks at 328 and 419 nm, for which no spectrally resolved literature cross sections are available. As these absorptions potentially influence the spectral retrieval of various trace gases, such as HCHO, BrO, OClO and

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6

Liu, Ji-Feng. "Theoretical reconsideration on the hydrogen bonding and coordination interactions of chlorophyll a in aqueous solution." Journal of Porphyrins and Phthalocyanines 15, no. 03 (2011): 202–10. http://dx.doi.org/10.1142/s1088424611003148.

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In the present work, explicit water molecule and solvent-field effects on the absorption spectrum of chlorophyll a have been studied using time-dependent density functional theory (TDDFT) method. Calculated results show that the one complex and two water coordinated complexes formed by concerted coordination and hydrogen-bonding interactions would be the most preferable conformations of chlorophyll a in aqueous surroundings. Moreover, four obvious absorption bands are assigned by comparing the theoretically simulated absorption spectra with the experimental ones. The theoretical study shows th

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7

Chen, J., and D. S. Venables. "A broadband optical cavity spectrometer for measuring weak near-ultraviolet absorption spectra of gases." Atmospheric Measurement Techniques Discussions 3, no. 5 (2010): 4571–602. http://dx.doi.org/10.5194/amtd-3-4571-2010.

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Abstract. Accurate absorption spectra of gases in the near-ultraviolet (300 to 400 nm) are essential in atmospheric observations and laboratory studies. This paper describes a novel incoherent broadband cavity-enhanced absorption spectroscopy (IBBCEAS) instrument for measuring very weak absorption spectra from 335 to 375 nm. The instrument performance was validated against the 3B1−X1A1 transition of SO2. The measured absorption varied linearly with SO2 column density and the resulting spectrum agrees well with published spectra. Using the instrument, we report new absorption cross-sections of

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8

Chen, J., and D. S. Venables. "A broadband optical cavity spectrometer for measuring weak near-ultraviolet absorption spectra of gases." Atmospheric Measurement Techniques 4, no. 3 (2011): 425–36. http://dx.doi.org/10.5194/amt-4-425-2011.

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Abstract. Accurate absorption spectra of gases in the near–ultraviolet (300 to 400 nm) are essential in atmospheric observations and laboratory studies. This paper describes a novel incoherent broadband cavity-enhanced absorption spectroscopy (IBBCEAS) instrument for measuring very weak absorption spectra from 335 to 375 nm. The instrument performance was validated against the 3B1-X1A1 transition of SO2. The measured absorption varied linearly with SO2 column density and the resulting spectrum agrees well with published spectra. Using the instrument, we report new absorption cross-sections of

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9

Okoshi, Katsuya, Yosuke Minowa, Nobunari Kashikawa, et al. "Multiple Mg ii Absorption Systems in the Lines of Sight to Quadruply Lensed Quasar H1413+1143." Astronomical Journal 162, no. 5 (2021): 175. http://dx.doi.org/10.3847/1538-3881/ac0bbb.

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Abstract We find multiple Mg ii absorption systems at redshift z = 1.66, 2.069, and 2.097 in the spatially resolved spectra of the quadruply gravitationally lensed quasar H1413+1143 utilizing the Kyoto tridimensional spectrograph ii (Kyoto 3D ii) spectrograph on board the Subaru telescope. Here we present the first measurement of differences in Mg ii absorption strength of the multiple intervening absorbers, which include ones identified as damped Lyα (DLA) absorption systems. Our detection of the significant Mg ii absorptions in the spatially resolved spectra reveals the inhomogeneous chemica

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10

Kremkau, FW. "Molecular Absorption of Ultrasound in Biological Tissues." Physiology 4, no. 1 (1989): 26–29. http://dx.doi.org/10.1152/physiologyonline.1989.4.1.26.

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Attenuation of ultrasound in tissues is due primarily to macromolecular absorption. Biomacromolecules have higher absorptions than the constituent molecules of which they are made. Absorption dependencies on structure and solvation are probably interrelated. Underlying absorption processes are enhanced or new processes are added under conditions of high concentration, aggregation, or cross-linking.

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11

Li, Yumin, Tzung-May Fu, Jian Zhen Yu, et al. "Nitrogen dominates global atmospheric organic aerosol absorption." Science 387, no. 6737 (2025): 989–95. https://doi.org/10.1126/science.adr4473.

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Atmospheric organic aerosols (OAs) influence Earth’s climate by absorbing sunlight. However, the link between their evolving composition and their absorptive effects is unclear. We demonstrate that brown nitrogen (BrN), the absorptive nitrogenous component of OAs, dominates their global absorption. Using a global model, we quantified BrN abundance, tracked its optical evolution with chemical aging, and assessed its radiative absorption. BrN contributes 76% of OAs’ surface light absorption over the US and 61% of their global absorptive optical depth. Moreover, the observed variability of OAs’ a

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12

Burda, C., and Mostafa A. El-Sayed. "High-density femtosecond transient absorption spectroscopy of semiconductor nanoparticles. A tool to investigate surface quality." Pure and Applied Chemistry 72, no. 1-2 (2000): 165–77. http://dx.doi.org/10.1351/pac200072010165.

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At the high laser excitation intensities used in our experiments, more than 50 electron-hole pairs are formed in colloidal semiconductor nanoparticles used in our studies. At this density of charge carriers, new transient absorptions are observed in the femtosecond transient spectra in the 450 to 700 nm region with unresolved fast rise (<100 fs) and two decay components of 660 fs and >150 ps. The absorption at 510 nm could be quenched with the adsorption of electron acceptors (e.g., benzoquinone, 1,2-naphthoquinone), whereas the low-energy transient absorption was not affected. For CdS N

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13

Lampel, Johannes, Denis Pöhler, Oleg L. Polyansky, et al. "Detection of water vapour absorption around 363 nm in measured atmospheric absorption spectra and its effect on DOAS evaluations." Atmospheric Chemistry and Physics 17, no. 2 (2017): 1271–95. http://dx.doi.org/10.5194/acp-17-1271-2017.

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Abstract. Water vapour is known to absorb radiation from the microwave region to the blue part of the visible spectrum with decreasing efficiency. Ab initio approaches to model individual absorption lines of the gaseous water molecule predict absorption lines up to its dissociation limit at 243 nm.We present the first evidence of water vapour absorption near 363 nm from field measurements using data from multi-axis differential optical absorption spectroscopy (MAX-DOAS) and long-path (LP)-DOAS measurements. The identification of the absorptions was based on the recent POKAZATEL line list by Po

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14

W, Zoelyn, and Mei Ie. "PERAN ORIENTASI PASAR DAN ORIENTASI KEWIRAUSAHAAN DALAM MEMPREDIKSI KINERJA DENGAN DIMEDIASI KAPASITAS ABSORPTIF." Jurnal Muara Ilmu Ekonomi dan Bisnis 7, no. 1 (2023): 161–75. http://dx.doi.org/10.24912/jmieb.v7i1.23228.

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Orientasi pasar diartikan sebagai kemampuan individu dalam memahami pelanggan dan menghadapi pesaing. Orientasi kewirausahaan merupakan kemampuan individu dalam berinovasi, bertindak proaktif dan mengambil risiko. Kapasitas absorptif merupakan kemampuan individu dalam mengidentifikasi hal baru dan menerapkan ke dalam usaha. Kinerja UKM merupakan kualitas layanan yang diberikan usaha untuk mencapai keunggulan kompetitif. Penelitian ini diadakan dengan tujuan agar mengetahui kontribusi pada orientasi pasar dan orientasi kewirausahaan terhadap kinerja UKM dan efek mediasi kapasitas absorptif. Pen

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15

Nelson, Peter L. "Personality Trait Absorption: An Exploratory Study of Opportunity and Capacity in Relation to Cannabis Use." Imagination, Cognition and Personality 15, no. 1 (1995): 75–101. http://dx.doi.org/10.2190/ttd8-89pe-jnvw-ab5n.

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Although the Tellegen Absorption Scale has been widely employed in recent years as a measure of personality Trait Absorption, it is argued that this simple score does not sufficiently discriminate true capacity for Absorption nor does it reveal the level of opportunity made for absorptive experiencing. This study operationalizes Capacity and Opportunity as two additional subscales appended to the Tellegen scale and, by employing the technique of Principal Components Analysis, five useful sub-dimensions are generated. Following on from this Author's earlier suggestion that personality Trait Abs

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16

Lee, Joo-Ha, Do Guen Yoo, and Bo Yeon Lee. "Effective Absorption Capacity Examined by Isothermal Calorimetry: Effect of Pore Structure and Water-to-Cement Ratio." Advances in Materials Science and Engineering 2020 (June 24, 2020): 1–8. http://dx.doi.org/10.1155/2020/7692751.

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The accurate measurement of effective absorption capacity is crucial for highly absorptive materials when they are used within cement-based materials. In this study, a method for examining effective absorption capacity using isothermal calorimetry is reviewed and investigated in detail to accommodate different circumstances. Specifically, the effect of different pore structures and water-to-cement ratios in determining effective absorption capacity is experimentally examined using activated carbon fibre and powdered activated carbon. The results suggest that the method may be suitable for poro

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17

Gotoh, Tamihiro. "Defect absorption in selenium films by photothermal deflection spectroscopy." European Physical Journal Applied Physics 89, no. 1 (2020): 10301. http://dx.doi.org/10.1051/epjap/2020190247.

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Sub-gap absorption spectra of selenium films are investigated by photothermal deflection spectroscopy. The selenium films are prepared by vacuum evaporation of selenium pellets. Raman spectroscopy reveals that as-deposited films are amorphous, and the films annealed at 100 °C are trigonal crystal. Photothermal deflection spectroscopy is extended to infrared light of 0.31 eV with maintaining high sensitivity, and detects weak absorption at energies below the band gap. Five absorption peaks and tail absorption are observed in selenium films, and the absorption peak energies are 1.32, 1.08, 0.47,

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18

Yuan, Fang, Qiang Chen, Yuejun Zheng, and Yunqi Fu. "Dual-Mechanism Absorptive Metasurface with Wideband 20 dB RCS Reduction." Crystals 12, no. 4 (2022): 493. http://dx.doi.org/10.3390/cryst12040493.

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This paper presents a dual-mechanism method to design a single-layer absorptive metasurface with wideband 20 dB RCS reduction by simultaneously combining the absorption and phase cancellation mechanisms. The metasurface comprises two kinds of absorbing unit cells with 10 dB absorption performance but different reflection phases. The impedance condition for 20 dB RCS reduction is theoretically analyzed considering both the absorption and the phase cancellation based on the two unit cells, and the relationship between the surface impedance and the reflection phase/amplitude is revealed. Accordin

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19

Taheri, Mohammad Ali, Firouz Payervand, Farzad Ahmadkhanlou, Sara Torabi, and Farid Semsarha. "Investigating Ultraviolet-Visible Absorption of Pure Water and Normal Saline under the Treatment of Taheri Consciousness Fields." Scientific Journal of Cosmointel 3, no. 13 (2024): 25–30. http://dx.doi.org/10.61450/joci.v3i13.172.

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UV-Vis spectroscopy is a spectrophotometric technique that relies on the absorption of light by species within the ultraviolet to visible range (200 to 700 nanometers). The study of water absorption has been conducted over the decades from the 1930s to the 1980s to investigate electron transfer levels in various studies. The investigation of the absorptive properties of solutions provides significant information about changes in their internal environment, reactions, and molecular interactions. In this study, with the aim of investigating the effectiveness of T-Consciousness Fields on water mo

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20

Rusli, M., R. S. Nanda, H. Dahlan, M. Bur, and M. Okuma. "Sound Absorption Characteristics of Composite Panel Made from Coconut Coir and Oil Palm Empty Fruit Bunches Fibre with Polyester." International Journal of Automotive and Mechanical Engineering 18, no. 3 (2021): 9022–28. http://dx.doi.org/10.15282/ijame.18.3.2021.14.0691.

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The development of pure natural fibres as sound absorptive material remains overlooked due to their lack of mechanical and moist properties, low durability, and vulnerability to be damaged by the environment. Certain fibre treatments are needed to improve such disadvantages. This paper investigates sound absorption characteristics of coconut fibre (coir) and oil palm fibre made from empty fruit bunches (OPEFB) fibre bonded by polyester that can protect them from the ambient environment in order to increase their durability. Two types of fibre-polyester composites have been tested. The first is

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21

Wang, Xiao Hua. "Synthesis of Acrylic High-Oil Absorption Resins." Advanced Materials Research 502 (April 2012): 222–26. http://dx.doi.org/10.4028/www.scientific.net/amr.502.222.

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Through suspension polymerization , the influences of different crosslinking agent, initiator, disperser and reaction temperature on oil absorption rate of cetane methacrylate highly oil absorptive resin were studied. The oil absorption ability of the resin for different oil was investigated. The results show the oil absorption capacity of synthesized resins was good with crosslinker divinylbenzene(DVB), initiator benzoyl peroxide(BPO) and disperser polyvinyl alcohol(PVA). Suitable process conditions were: crosslinker DVB 1.0%, initiator BPO 1.2%, disperser PVA 0.8%, reaction temperature 70°C,

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22

Qi, Honglong, Tian Sang, La Wang, Xin Yin, Jicheng Wang, and Yueke Wang. "Dual-Band Light Absorption Enhancement in Hyperbolic Rectangular Array." Applied Sciences 9, no. 10 (2019): 2011. http://dx.doi.org/10.3390/app9102011.

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The effect of dual-band light absorption enhancement in a hyperbolic rectangular array (HRA) is presented. The enhanced light absorption of the HRA results from the propagating surface plasmon (PSP) resonance, and a dual-band absorption with low and flat sideband level can be realized. The impedance theory is used to evaluate the absorption properties of the HRA, and shows that the input impedances of the HRA varied abruptly around the absorption bands to meet the impedance matching. The absorption spectra of the HRA can be estimated using the effective medium theory (EMT), and its accuracy ca

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23

Ba, YinYing, MengLin Wang, KunFeng Zhang, et al. "Intestinal Absorption Profile of Three Polygala Oligosaccharide Esters in Polygalae Radix and the Effects of Other Components in Polygalae Radix on Their Absorption." Evidence-Based Complementary and Alternative Medicine 2019 (July 2, 2019): 1–12. http://dx.doi.org/10.1155/2019/1379531.

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Oligosaccharide esters, which are among the main active components of Polygalae Radix (PR), demonstrate significant pharmacological activities in the human nervous system. In our previous research, some other constituents in PR were able to improve the bioavailability of oligosaccharide esters such as sibiricose A5 (SA5), sibiricose A6 (SA6), and 3,6′-disinapoyl sucrose (DISS), but the related components and their underlying mechanisms remain unknown. The present study aimed to investigate the intestinal absorptive profile of SA5, SA6, and DISS and the absorptive behavior influenced by the coa

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24

Okoshi, Katsuya, Yosuke Minowa, Nobunari Kashikawa, Suzuka Koyamada, and Toru Misawa. "Multiple Absorption Systems in the Lines of Sight to Quadruply Lensed Quasar H1413+1143 As a Probe of the Circumgalactic medium around Dwarf Galaxy." Proceedings of the International Astronomical Union 14, S344 (2018): 305–8. http://dx.doi.org/10.1017/s1743921318006683.

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AbstractWe present the first measurement of differences in MgII absorption strength in multiple intervening absorbers, which are also identified as (sub-)Damped Lyman alpha absorption systems, in the four spectra of the quadruply lensed quasar H1413+1143, often referred to the “Cloverleaf”, from highly spatial resolution and high signal-to-noise spectroscopy with an optical multi-mode spectrograph, the Kyoto tridimentional spectrograph II on board the Subaru telescope. The detection of significant MgII absorptions in multiple components in the spatially-resolved spectra suggests that chemical

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25

Bastl, C. P., G. Schulman, and E. J. Cragoe. "Low-dose glucocorticoids stimulate electroneutral NaCl absorption in rat colon." American Journal of Physiology-Renal Physiology 257, no. 6 (1989): F1027—F1038. http://dx.doi.org/10.1152/ajprenal.1989.257.6.f1027.

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Glucocorticoids, not aldosterone, may regulate basal colonic NaCl transport. Aldosterone induces spironolactone-inhibitable, amiloride-inhibitable conductive Na absorption but basal transport is electroneutral and amiloride and spironolactone resistant. We examined in vivo the Na absorptive pathway induced by glucocorticoid receptor specific doses of glucocorticoid using various amiloride analogues. Doses of dexamethasone sufficient to co-occupy aldosterone receptors produced amiloride-sensitive Na absorption in proximal and distal colon. Low doses of dexamethasone or the specific glucocortico

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26

DUCHEK, STEPHANIE. "DESIGNING ABSORPTIVE CAPACITY? AN ANALYSIS OF KNOWLEDGE ABSORPTION PRACTICES IN GERMAN HIGH-TECH FIRMS." International Journal of Innovation Management 19, no. 04 (2015): 1550044. http://dx.doi.org/10.1142/s1363919615500449.

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The concept of absorptive capacity was introduced by Cohen and Levinthal in 1989 as an important condition for high innovativeness. Since then it has been enhanced through reconceptualisations and extended by various empirical studies. Despite the growing interest in the concept, the processes and practices of absorptive capacity have largely remained a "black box". To fill this gap, the paper develops a practice-based approach of absorptive capacity and provides an in-depth empirical investigation to shed more light on the practice of knowledge absorption. Drawing on the case studies of two G

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27

Herreman, Kevin. "Which absorption coefficients are correct?" Journal of the Acoustical Society of America 155, no. 3_Supplement (2024): A91. http://dx.doi.org/10.1121/10.0026917.

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Each year absorptive material samples are sent to various accredited acoustic laboratories around the country by manufacturers who want to verify the performance of their products. Results are published as indisputable validation of the product absorption performance by the manufacturer. As no recent interlaboratory study results for ASTM C423—Standard Test Method for Sound Absorption and Sound Absorption Coefficients by the Reverberation Room Method are available, the Owens Corning Acoustic Research Center initiated a private interlaboratory study. A small set of accredited acoustical laborat

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Xu, Wanting, Na Liu, and Zhongchen Lu. "Recent Progress of Iron-Based Magnetic Absorbers and Its Applications in Elastomers: A Review." Materials 17, no. 16 (2024): 4058. http://dx.doi.org/10.3390/ma17164058.

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As a result of continuing scientific and technological progress, electromagnetic waves have become increasingly pervasive across a variety of domains, particularly within the microwave frequency range. These waves have found extensive applications in wireless communications, high-frequency electronic circuits, and several related fields. As a result, absorptive materials have become indispensable for dual-use applications across both the military and civilian domains because of their exceptional electromagnetic wave absorption properties. This paper, beginning with the operating mechanisms of

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29

Jin, Li, Jun Zhou, and Puxiang Lai. "Tunable absorption characteristics in multilayered structures with graphene for biosensing." Journal of Innovative Optical Health Sciences 13, no. 04 (2020): 2050017. http://dx.doi.org/10.1142/s1793545820500170.

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Graphene derivatives, possessing strong Raman scattering and near-infrared absorption intrinsically, have boosted many exciting biosensing applications. The tunability of the absorption characteristics, however, remains largely unexplored to date. Here, we proposed a multilayer configuration constructed by a graphene monolayer sandwiched between a buffer layer and one-dimensional photonic crystal (1DPC) to achieve tunable graphene absorption under total internal reflection (TIR). It is interesting that the unique optical properties of the buffer-graphene-1DPC multilayer structure, the electrom

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Erika Mulyana Gultom and M. Turmuzi Lubis. "APLIKASI KARBON AKTIF DARI CANGKANG KELAPA SAWIT DENGAN AKTIVATOR H3PO4 UNTUK PENYERAPAN LOGAM BERAT Cd DAN Pb." Jurnal Teknik Kimia USU 3, no. 1 (2014): 5–10. http://dx.doi.org/10.32734/jtk.v3i1.1493.

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This research aims to determine the optimum conditions ofactivated carbon made of palm shells activated with H3PO4as an absorber of heavy metals such as Cd and Pb. The research methodology includes the preparation of activated carbon, absorption, and testing. Absorption stage is done by varying the concentration of heavy metals are 5 ppm, 10 ppm, 15 ppm, 20 ppm and activated carbon mass per run, which is0.5 grams. Another variable are the contact time with intervals of 5 minutes and the pH arranged heavy metals 2-9. Testing activated carbon absorption to heavy metals using atomic adsorption sp

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Maeshima, Hiroshi, Kosei Matsumoto, Yasuhiro Hirahara, et al. "Infrared Absorption and Its Sources of CdZnTe at Cryogenic Temperature." Journal of Electronic Materials 51, no. 2 (2022): 564–76. http://dx.doi.org/10.1007/s11664-021-09361-1.

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AbstractTo reveal the causes of infrared absorption in the wavelength region between electronic and lattice absorptions, we measured the temperature dependence of the absorption coefficient of p-type low-resistivity ($$\sim 10^2~ \Omega \mathrm{cm}$$ ∼ 10 2 Ω cm ) CdZnTe crystals. We measured the absorption coefficients of CdZnTe crystals in four wavelength bands ($$\lambda =6.45$$ λ = 6.45 , 10.6, 11.6, 15.1$$~\mu $$ μ m) over the temperature range of $$T=8.6$$ T = 8.6 -300 K with an originally developed system. The CdZnTe absorption coefficient was measured to be $$\alpha =0.3$$ α = 0.3 -0.5

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32

Saleh, R., C. J. Hennigan, G. R. McMeeking, et al. "Absorptivity of brown carbon in fresh and photo-chemically aged biomass-burning emissions." Atmospheric Chemistry and Physics Discussions 13, no. 5 (2013): 11509–36. http://dx.doi.org/10.5194/acpd-13-11509-2013.

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Abstract. Experiments were conducted to investigate light absorption of organic aerosol (OA) in fresh and photo-chemically aged biomass-burning emissions. The experiments considered residential hardwood fuel (oak) and fuels commonly consumed in wild-land and prescribed fires in the United States (pocosin pine and gallberry). Photo-chemical aging was performed in an environmental chamber. We constrained the light-absorption properties of the OA using conservative limiting assumptions, and found that both primary organic aerosol (POA) in the fresh emissions and secondary organic aerosol (SOA) pr

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Oramasionwu, Gloria E., Tom D. Thacher, Sunday D. Pam, John M. Pettifor, and Steven A. Abrams. "Adaptation of calcium absorption during treatment of nutritional rickets in Nigerian children." British Journal of Nutrition 100, no. 2 (2008): 387–92. http://dx.doi.org/10.1017/s0007114507901233.

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Nutritional rickets in Nigerian children has been effectively treated with Ca supplementation. High values of Ca absorption efficiency have been observed in untreated children, but whether Ca absorption efficiency changes during treatment with Ca is unknown. Our objective in conducting this study was to identify the effect of Ca therapy on Ca absorptive efficiency in children with primary Ca-deficient nutritional rickets. Twelve children with radiographically active rickets, 2 to 14 years of age (median 39 months) participated in the study. We assessed dietary Ca intake via dietary recalls, an

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MAENG, INHEE, SEUNG HYUN BAEK, HWA YEON KIM, GYEONG-SIK OK, SUNG-WOOK CHOI, and HYANG SOOK CHUN. "Feasibility of Using Terahertz Spectroscopy To Detect Seven Different Pesticides in Wheat Flour." Journal of Food Protection 77, no. 12 (2014): 2081–87. http://dx.doi.org/10.4315/0362-028x.jfp-14-138.

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This study investigated the feasibility of detecting pesticides using terahertz (THz) spectroscopy in high-density polyethylene and/or wheat flour mixtures. The absorption spectra of seven pesticides (dicofol, chlorpyrifos, chlorpyrifos-methyl, daminozide, imidacloprid, diethyldithiocarbamate, and dimethyldithiocarbamate) were measured in the frequency range 0.1 to 3 THz at room temperature. Five of the seven pesticides exhibited specific absorption peaks in the low-energy THz range. The two remaining pesticides had no specific absorption peaks in this frequency range, but they exhibited diffe

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Hargrove, J. "Water dimer absorption of visible light." Atmospheric Chemistry and Physics Discussions 7, no. 4 (2007): 11123–40. http://dx.doi.org/10.5194/acpd-7-11123-2007.

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Abstract. Laboratory measurements of water vapor absorption using cavity ring-down spectroscopy revealed a broad absorption at 405 nm with a quadratic dependence on water monomer concentration, a similar absorption with a linear component at 532 nm, and only linear absorption at 570 nm in the vicinity of water monomer peaks. D2O absorption is weaker and linear at 405 nm. Van't Hoff plots constructed at 405.26 nm suggest that for dimerization, Keq=0.056±0.02 atm−1, ΔH°301 K=−16.6±2 kJ mol−1 and ΔS°301 K=−80±10 J mol−1 K−1. This transition peaks at 409.5 nm, could be attributed to the 8th overto

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Sharon, Maheshwar, Ritesh Vishwakarma, Abhijeet Rajendra Phatak, Golap Kalita, Nallin Sharma, and Madhuri Sharon. "Microwave wide band absorption by carbon from Corn cob-1." JOURNAL OF ADVANCES IN PHYSICS 12, no. 2 (2016): 4204–12. http://dx.doi.org/10.24297/jap.v12i2.53.

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Corn cob, an agricultural waste, is paralyzed at different temperatures (700oC, 800oC and 900oC). Microwave absorption of carbon in the frequency range of 2 GHz to 8 GHz is reported. Carbon activated Â with 5%Â nickel nitrate showed more than 90% absorption of microwave in the frequency range from 6 GHz to 8 GHz, while carbon activated Â with 10% Nickel nitrate treated corn cob showed 90% absorptionÂ in the frequency range of 2.5 GHz to 5 GHz. Carbon showing the best absorption are characterized by XRD, Raman spectra and SEM . It is suggested that corn cob treatmentÂ Â alone with KOH did not i

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Gallardo, Pedro, Nancy Olea, and Francisco V. Sepúlveda. "Distribution of aquaporins in the colon of Octodon degus, a South American desert rodent." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 283, no. 3 (2002): R779—R788. http://dx.doi.org/10.1152/ajpregu.00218.2002.

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Octodon degus is a desert rodent of northern Chile, adapted to survive with a limited supply of water. This rodent has a high degree of fecal dehydration, related to colon water absorption. With the hypothesis that aquaporins (AQPs) might be present in the colon epithelium of O. degus and involved in fluid absorption, we studied colon water absorption in vivo and the distribution of AQPs and Na+ transporters by immunocytochemistry. AQP-1 was found in apical and basolateral membranes of surface-absorptive and crypt epithelial cells. AQP-8 was found in the cytoplasm of enterocytes of surface col

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Yeo, C. J., J. A. Bastidas, R. E. Schmieg, and M. J. Zinner. "Meal-stimulated absorption of water and electrolytes in canine jejunum." American Journal of Physiology-Gastrointestinal and Liver Physiology 259, no. 3 (1990): G402—G409. http://dx.doi.org/10.1152/ajpgi.1990.259.3.g402.

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After a meal, the absorption of water and electrolytes from the jejunal lumen increases. This meal-induced jejunal absorption occurs in jejunal segments out of normal gastrointestinal continuity. The experimental model used 25-cm proximal jejunal Thiry-Vella loops in awake dogs (n = 72 observations) to evaluate the mechanisms involved in meal-induced jejunal absorption, seeking to define the source or sources of the proabsorptive signal. Specifically, we evaluated the jejunal absorptive response to a standard meal, a standard meal plus cholinergic blockage using atropine, a sham-fed meal, a ga

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Van Clief-Stefanon, Lyrae. "Absorption." Callaloo 34, no. 3 (2011): 866. http://dx.doi.org/10.1353/cal.2011.0188.

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Menzies, Victoria, Ann Gill Taylor, and Cheryl Bourguignon. "Absorption." Journal of Holistic Nursing 26, no. 4 (2008): 297–302. http://dx.doi.org/10.1177/0898010107307456.

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Kemp, Adrienne W. "Absorption sampling and the absorption distribution." Journal of Applied Probability 35, no. 2 (1998): 489–94. http://dx.doi.org/10.1239/jap/1032192864.

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The inverse absorption distribution is shown to be a q-Pascal analogue of the Kemp and Kemp (1991) q-binomial distribution. The probabilities for the direct absorption distribution are obtained via the inverse absorption probabilities and exact expressions for its first two factorial moments are derived using q-series transformations of its probability generating function. Alternative models for the distribution are given.

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Kemp, Adrienne W. "Absorption sampling and the absorption distribution." Journal of Applied Probability 35, no. 02 (1998): 489–94. http://dx.doi.org/10.1017/s0021900200015114.

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The inverse absorption distribution is shown to be a q-Pascal analogue of the Kemp and Kemp (1991) q-binomial distribution. The probabilities for the direct absorption distribution are obtained via the inverse absorption probabilities and exact expressions for its first two factorial moments are derived using q-series transformations of its probability generating function. Alternative models for the distribution are given.

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Wei, X. F., J. F. Ruan, C. G. Xie, H. Yuan, and J. Song. "Two-Colour Mid-Infrared Optical Absorption under Electric Field in an InAs/GaSb-Based Type II and Broken-Gap Quantum Well." Applied Mechanics and Materials 130-134 (October 2011): 4122–25. http://dx.doi.org/10.4028/www.scientific.net/amm.130-134.4122.

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The optical absorptions are calculated in an InAs/GaSb-based type II and broken-gap quantum well under applied electric field. Two absorption peaks were observed through intraband transitions within the same material layer. The absorption induced by the interlayer transition is rather weak due to the small overlap of electron and hole wavefunctions. The optical absorption can be significantly affected by the applied electric field. Our results suggest that InAs/GaSb-based type II and broken-gap QWs can be employed as two-colour photodetectors, which can be controlled by the applied electric fi

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King, Janet C. "Does Zinc Absorption Reflect Zinc Status?" International Journal for Vitamin and Nutrition Research 80, no. 45 (2010): 300–306. http://dx.doi.org/10.1024/0300-9831/a000037.

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Unlike iron, zinc absorption is influenced by dietary zinc intake, not zinc status. As dietary zinc increases, the total amount of absorbed zinc increases while the percent absorbed declines. The gastrointestinal tract maintains whole-body zinc homeostasis by adjusting endogenous zinc losses to the amount absorbed. At intakes below about 9 mg/day, zinc absorption occurs primarily by a saturable (carrier) process involving ZIP4, ZnT1, and other transporters. There is no evidence that past zinc intakes, or status, influences zinc absorption. Instead, current zinc intake is the chief determinant

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Lee, Yiu-Yin. "Chaotic Vibration and Perforation Effects on the Sound Absorption of a Nonlinear Curved Panel Absorber." Mathematics 11, no. 14 (2023): 3178. http://dx.doi.org/10.3390/math11143178.

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This study is the first to investigate the effect of chaotic vibration on the sound absorption of a curved perforated panel. Previous studies on the effect of nonlinear vibration on the sound absorption of a panel absorber have focused on periodic responses only. In this study, a sound absorption formula was derived by considering the panel impedance and perforation impedance. The numerical integration method was adopted to generate various chaotic vibrational responses, which were used to compute the corresponding sound absorptions. Several interesting findings that have never been observed i

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Neis, Andressa, and Júlio Eduardo Rohenkohl. "Comparative Analysis of the Knowledge Absorption Capacity of Auto Parts Companies in the State of Rio Grande do Sul." Revista Brasileira de Inovação 23 (July 29, 2024): 33. http://dx.doi.org/10.20396/rbi.v23i00.8670897.

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The article analyzes auto parts companies in Rio Grande do Sul so as to understand their knowledge absorption capacities and to identify important combinations to reach Absorptive Capacity. The Absorptive Capacity is a dynamic skill, and relationships among learning, innovation and interaction may boost knowledge absorption and improve companies' innovative capabilities. Data analysis using Fuzzy Sets Qualitative Comparative Analysis revealed necessary and sufficient conditions related to the dimensions and components that shape the Absorptive Capacity. It was observed that the combinations of

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Lane, John S., Edward E. Whang, David A. Rigberg, et al. "Paracellular glucose transport plays a minor role in the unanesthetized dog." American Journal of Physiology-Gastrointestinal and Liver Physiology 276, no. 3 (1999): G789—G794. http://dx.doi.org/10.1152/ajpgi.1999.276.3.g789.

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Traditionally, intestinal glucose absorption was thought to occur through active, carrier-mediated transport. However, proponents of paracellular transport have argued that previous experiments neglected effects of solvent drag coming from high local concentrations of glucose at the brush-border membrane. The purpose of this study was to evaluate glucose absorption in the awake dog under conditions that would maximize any contribution of paracellular transport. Jejunal Thiry-Vella loops were constructed in six female mongrel dogs. After surgical recovery, isotonic buffers containingl-glucose a

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Ohkohchi, Nobuhiro, Tadashi Andoh, Ryoji Ohi, and Shozo Mori. "Defined Formula Diets Alter Characteristics of the Intestinal Transport of Amino Acid and Peptide in Growing Rats." Journal of Pediatric Gastroenterology and Nutrition 10, no. 4 (1990): 490–96. http://dx.doi.org/10.1002/j.1536-4801.1990.tb10035.x.

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SummaryRecently defined formula diets are widely used for patients with digestive diseases. Long‐term administration of such diets is presumed to change the absorptive characteristics of the small intestine. We investigated the influence of the defined formula diet on the absorptive capacity of growing rats by measuring the potential difference of sugars, amino acid, half‐maximum concentration (kt) of these substrates, the activities of disaccharidase and dipeptidase, and the portal amino acid concentrations. There was no significant difference in the body weight of rats fed amino acid or pept

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Nguyen, Huong, and Erling Nilsson. "The effect of furniture on room acoustic parameters and its dependence on different suspended ceilings' sound absorptive properties." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 268, no. 3 (2023): 5709–18. http://dx.doi.org/10.3397/in_2023_0814.

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In ordinary public rooms such as classrooms and offices, the base line of acoustical treatment is an absorbent suspended ceiling. Due to the non-uniform distribution of the absorptive material, the scattering as well as the absorption properties of furniture will have a significant influence on room acoustic parameters such as reverberation time, speech clarity and sound strength. In particular, the absorption of the sound scattered energy will depend on the absorbing efficiency of the suspended ceiling. This effect is not accounted for in classical diffuse field models such as Sabine's formul

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Zhiya, Wumani Victor, Omololu Akin-Ajo, Enemona Titus Ogbe, Peverga Rex Jubu, and Adepoju Adebayo Tolulopea. "Effects of Intermolecular Distance on the Absorption Spectra of Organic Semiconductors." International Journal of Innovation in Engineering 4, no. 4 (2025): 28–36. https://doi.org/10.59615/ijie.4.4.28.

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Organic semiconductors have several advantages over conventional inorganic semiconductors. The optical properties of π-conjugated organic molecules are important in determining the performance efficiencies of photovoltaic cells, optoelectronic devices and organic thin-film transistors and lasers. This work examined the variation of absorption spectra of three organic semiconductors (perylene, pentacene, and sexithienyl) with their geometries and intermolecular distances between the dimer molecules. Quantum mechanical calculations using the PM3 semi-empirical approximation were used to obtain t

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