Log in

Relevant bibliographies by topics / Acidic ridge / Journal articles

To see the other types of publications on this topic, follow the link: Acidic ridge.

Journal articles on the topic 'Acidic ridge'

Author: Grafiati

Published: 9 March 2023

Last updated: 31 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Acidic ridge.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Schwarzenbach, Esther M., and Matthew Steele-MacInnis. "Fluids in Submarine Mid-Ocean Ridge Hydrothermal Settings." Elements 16, no. 6 (2020): 389–94. http://dx.doi.org/10.2138/gselements.16.6.389.

Full text

Abstract:

Seawater interaction with the oceanic lithosphere crucially impacts on global geochemical cycles, controls ocean chemistry over geologic time, changes the petrophysical properties of the oceanic lithosphere, and regulates the global heat budget. Extensive seawater circulation is expressed near oceanic ridges by the venting of hydrothermal fluids through chimney structures. These vent fluids vary greatly in chemistry, from the metal-rich, acidic fluids that emanate from “black smokers” at temperatures up to 400 °C to the metal-poor, highly alkaline and reducing fluids that issue from the carbon

APA, Harvard, Vancouver, ISO, and other styles

2

Danilova, A. N., and A. A. Sumbembayev. "Population study of Allium altaicum Pall. in Kazakhstan Altai." Bulletin of the Karaganda University. “Biology, medicine, geography Series” 112, no. 4 (2023): 31–41. http://dx.doi.org/10.31489/2023bmg4/31-41.

Full text

Abstract:

The purpose of this work was population studies of Allium altaicum Pall. on the territory of the Kazakhstan Altai in 3 territorially isolated geographical regions: Southern, South-Western Kalba Altai. As a result of the survey of the territory by the route-reconnaissance method on the ridges of Sarymsacty, Lineysky and Kalba, a study was made of populations that are characterized by different environmental conditions and altitudinal limits. Ecological and phytocenotic screening revealed that on the Sarymsacty ridge the population is located in the alpine belt in the altitudinal limit of 1870 m

APA, Harvard, Vancouver, ISO, and other styles

3

Minocha, Rakesh, Alexandra R. Contosta, Gregory B. Lawrence, Ravinder K. Kohli, Subhash C. Minocha, and Stephanie Long. "Changes in Soil Chemistry and Foliar Metabolism of Himalayan Cedar (Cedrus deodara) and Himalayan Spruce (Picea smithiana) along an Elevational Gradient at Kufri, HP, India: The Potential Roles of Regional Pollution and Localized Grazing." Forests 12, no. 4 (2021): 400. http://dx.doi.org/10.3390/f12040400.

Full text

Abstract:

We investigated changes in soil chemistry and foliar metabolism of Himalayan cedar [Cedrus deodara (Roxb. Ex Lamb.) G.Don] and Himalayan spruce [Picea smithiana (Wall.) Boiss] trees along a steep elevational gradient in the lower Himalayan Mountains at Kufri, Himachal Pradesh (HP), India. The foliar and soil samples were collected from four locations along a 300 m elevational gradient at ridge, high-, mid-, and low-elevation sites within the forested Shimla Water Catchment Wildlife Sanctuary that provides water for the city of Shimla, HP,. Observations at the time of sampling revealed that the

APA, Harvard, Vancouver, ISO, and other styles

4

Litvintseva, Z. O. "Geosystems of the Barguzin Ridge." Bulletin of Irkutsk State University. Series Earth Sciences 36 (2021): 63–74. http://dx.doi.org/10.26516/2073-3402.2021.36.63.

Full text

Abstract:

The study of geosystems of geodynamically active territories and their mapping is one of the urgent tasks of modern geographical research. The long period of formation and development of the Barguzin ridge determined the specifics of geosystems and their components. The conducted research allowed us to identify five physical and geographical areas, each of which has its own unique features. Within the large tectonic faults, which are characterized by an influx of endogenous heat and hot mineral springs are common, there is the largest accumulation of Miocene-Pliocene relics that have been pres

APA, Harvard, Vancouver, ISO, and other styles

5

Correia, Ana R., Tao Wang, Elizabeth A. Craig та Cláudio M. Gomes. "Iron-binding activity in yeast frataxin entails a trade off with stability in the α1/β1 acidic ridge region". Biochemical Journal 426, № 2 (2010): 197–203. http://dx.doi.org/10.1042/bj20091612.

Full text

Abstract:

Frataxin is a highly conserved mitochondrial protein whose deficiency in humans results in Friedreich's ataxia (FRDA), an autosomal recessive disorder characterized by progressive ataxia and cardiomyopathy. Although its cellular function is still not fully clear, the fact that frataxin plays a crucial role in Fe–S assembly on the scaffold protein Isu is well accepted. In the present paper, we report the characterization of eight frataxin variants having alterations on two putative functional regions: the α1/β1 acidic ridge and the conserved β-sheet surface. We report that frataxin iron-binding

APA, Harvard, Vancouver, ISO, and other styles

6

Winger, Parley V., Peter J. Lasier, Mark Hudy, Dean Fowler, and M. J. Van Den Avyle. "SENSITIVITY OF HIGH-ELEVATION STREAMS IN THE SOUTHERN BLUE RIDGE PROVINCE TO ACIDIC DEPOSITION1." JAWRA Journal of the American Water Resources Association 23, no. 3 (1987): 379–86. http://dx.doi.org/10.1111/j.1752-1688.1987.tb00816.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Sevindik, Tuğba Ongun, Paul Brian Hamilton, Cüneyt Nadir Solak, Elif Yilmaz, and Uğur Güzel. "Three New Nitzschia (Bacillariophyceae) Species from Highly Acidic Artificial Lakes in Çanakkale, Türkiye." Water 15, no. 21 (2023): 3784. http://dx.doi.org/10.3390/w15213784.

Full text

Abstract:

Çanakkale is located in Western Anatolia, a region known for extensive mining in the country. In this study, three new species: Nitzschia arslaniana sp. nov., Nitzschia efeiana sp. nov., and Nitzschia szaboiana sp. nov. are described from highly acidic environments in Çanakkale. In morphology, Nitzschia arslaniana is similar to Nitzschia inconspicua but Nitzschia inconspicua is broader, with a lower fibulae density. Nitzschia efeiana is similar to Nitzschia. bremensis, Nitzschia capitellata, Nitzschia homburgiensis, Nitzschia hybrida, Nitzschia palustris, and Nitzschia pellucida. However, Nitz

APA, Harvard, Vancouver, ISO, and other styles

8

Vovchina, T. "Structure, petrography and petrogeochemistry of acid rocks of extrusive-subvolcanic body of the southern part of the Enganepe Ridge (Polar Urals)." Vestnik of geosciences, no. 12 (February 16, 2023): 20–28. http://dx.doi.org/10.19110/geov.2022.12.3.

Full text

Abstract:

The results of the study of textural and structural features of acidic volcanites of the extrusive-subvolcanic body of the Lyadgey Complex (V2ld) between the Pravy Izyavozh and the Levy Izyavozh creeks of the southern part of the Enganepe Ridge are reported. We found that the extrusive-subvolcanic formation had an inhomogeneous structure due to the zonal arrangement of rock varieties: massive, fluid and spheruloid rhyolites, clusters of rhyolite and dacite composition. Prominence in relief, signs of extrusion of viscous lava, flow textures, successive change from west to east of fluid varieti

APA, Harvard, Vancouver, ISO, and other styles

9

Ijah, Christiana, Florence Umoh, and Otobong Essien. "Profile Distribution of Iron and Zinc in Soils formed from Three Different Parent Materials in Akwa Ibom State, Nigeria." AKSU Journal of Agriculture and Food Sciences 7, no. 2 (2023): 40–51. http://dx.doi.org/10.61090/aksuja.2023.008.

Full text

Abstract:

The distribution of total and available levels of iron (Fe) and zinc (Zn) was studied in three major soil types derived from different parent materials in Akwa Ibom State. The parent materials were: Sandstone (SS), Coastal Plain Sands (CPS) and Beach Ridge Sands (BRS), respectively. Six representative soil profiles, two each for SS, CPS and BRS were dug. The soils from the different parent materials were sampled at different depths of 0 – 20, 20 – 40, 40- 60, 60 – 80, 80 – 100 and 100 – 120 cm. The soil samples were air dried, crushed and sieved using a 2mm sieve and stored in labeled bags for

APA, Harvard, Vancouver, ISO, and other styles

10

LIFANOV, A. D., A. A. FATYKHOVA, and K. YU NIKITINA. "MODELING OF ADHESIVE COMPOUNDS OF POLYMERS IN CONTACT WITH METALLS." Herald of Technological University 28, no. 1 (2025): 142–46. https://doi.org/10.55421/1998-7072_2025_28_1_142.

Full text

Abstract:

In modern materials science, polymer-based synthetic materials are increasingly being used, including using composite materials. These materials are widely used as adhesive compounds in contact with metals. Ensuring the reliability of modern materials in harsh operating conditions determines the use of multifunctional polymer materials with a set of properties and capable of performing several important functions. At the same time, polymer materials can provide high physical and mechanical properties, adhesion, protection from aggressive media, high temperatures, vibration, atmospheric action,

APA, Harvard, Vancouver, ISO, and other styles

11

Pierre, Samuel, Alexander P. Gysi, and Thomas Monecke. "Fluid Chemistry of Mid-Ocean Ridge Hydrothermal Vents: A Comparison between Numerical Modeling and Vent Geochemical Data." Geofluids 2018 (October 31, 2018): 1–20. http://dx.doi.org/10.1155/2018/1389379.

Full text

Abstract:

Seawater-basalt interaction taking place at mid-ocean ridges was studied using numerical modeling to determine the compositional evolution of hydrothermal fluids and associated alteration mineralogy forming within newly emplaced crustal material. Geochemical modeling was carried out in a closed seawater-basalt system at discrete temperature intervals between 2 and 400°C at 500 bars, varying fluid/rock ratios, and secondary mineral assemblages representative of basalt alteration in natural systems. In addition to temperature, the fluid/rock ratio has a fundamental control on the resulting syste

APA, Harvard, Vancouver, ISO, and other styles

12

Green, Stefan J., Om Prakash, Puja Jasrotia, et al. "Denitrifying Bacteria from the Genus Rhodanobacter Dominate Bacterial Communities in the Highly Contaminated Subsurface of a Nuclear Legacy Waste Site." Applied and Environmental Microbiology 78, no. 4 (2011): 1039–47. http://dx.doi.org/10.1128/aem.06435-11.

Full text

Abstract:

ABSTRACTThe effect of long-term mixed-waste contamination, particularly uranium and nitrate, on the microbial community in the terrestrial subsurface was investigated at the field scale at the Oak Ridge Integrated Field Research Challenge (ORIFRC) site in Oak Ridge, TN. The abundance, community composition, and distribution of groundwater microorganisms were examined across the site during two seasonal sampling events. At representative locations, subsurface sediment was also examined from two boreholes, one sampled from the most heavily contaminated area of the site and another from an area w

APA, Harvard, Vancouver, ISO, and other styles

13

Armstrong, Debbie C. "Acid sulphate alteration in a magmatic hydrothermal environment, Barton Peninsula, King George Island, Antarctica." Mineralogical Magazine 59, no. 396 (1995): 429–41. http://dx.doi.org/10.1180/minmag.1995.059.396.05.

Full text

Abstract:

AbstractVolcanic-hosted advanced argillic alteration on Barton Peninsula comprises an assemblage of chalcedonic silica, alunite family minerals, pyrophyllite, pyrite, native sulphur, zunyite and rutile, characteristic of an acid sulphate-type epithermal system. The minerals minamiite, (Na0.36Ca0.27K0.1□0.27)Al3(SO4)2(OH)6, and zunyite, Al13Si5O20(OH,F)18Cl, are reported at this locality, and in Antarctica, for the first time. The WNW-striking, 1 km-long zone of alteration is hosted by early Tertiary andesitic rocks and contained in a 1.5 km-wide depression, rimmed by an arcuate ridge, probably

APA, Harvard, Vancouver, ISO, and other styles

14

Peterson, R. N., M. Gillott, W. Hunt, and L. D. Russell. "Organization of the boar spermatozoan plasma membrane: evidence for separate domains (subdomains) of integral membrane proteins in the plasma membrane overlying the principal segment of the acrosome." Journal of Cell Science 88, no. 3 (1987): 343–49. http://dx.doi.org/10.1242/jcs.88.3.343.

Full text

Abstract:

Indirect immunofluorescence microscopy and freeze-fracture have been used to identify overlapping subdomains at the peripheral rim of the sperm-head plasma membrane (PM) and the margin of the outer acrosomal membrane (OAM) comprising the principal segment of the acrosome of the boar spermatozoon. An array of ridge-like structures (spaced 12–16 nm centre-to-centre), originally observed on the OAM by Aguas & Pinto da Silva, lies just beneath an area of the PM that is sparsely populated with large intramembranous particles compared to that of other regions of the head PM. This region has a hi

APA, Harvard, Vancouver, ISO, and other styles

15

Saewu, Arpornrad, Suraj Kadunganattil, Riya Raghupathy, et al. "Clusterin in the mouse epididymis: possible roles in sperm maturation and capacitation." Reproduction 154, no. 6 (2017): 867–80. http://dx.doi.org/10.1530/rep-17-0518.

Full text

Abstract:

Clusterin (CLU) is known as an extracellular chaperone for proteins under stress, thus preventing them from aggregation and precipitation. We showed herein that CLU, expressed by principal cells of the mouse caput epididymis, was present in high amounts in the lumen. In the cauda epididymis, CLU bound tightly to the sperm head surface and its amount on total sperm was similar to that in the bathing luminal fluid. In both immotile and motile caudal epididymal sperm, CLU was localized over the entire sperm head except at the convex ridge, although in the motile sperm population, the CLU immunofl

APA, Harvard, Vancouver, ISO, and other styles

16

Shaffer, Paul W., and M. Robbins Church. "Terrestrial and In-Lake Contributions to Alkalinity Budgets of Drainage Lakes: An Assessment of Regional Differences." Canadian Journal of Fisheries and Aquatic Sciences 46, no. 3 (1989): 509–15. http://dx.doi.org/10.1139/f89-068.

Full text

Abstract:

Using two independent procedures, we estimate relative contributions of in-lake alkalinity generation to total basin alkalinity budgets for drainage lakes in selected regions of the Eastern United States. The first method is based on the assumption of approximately equal areal rates of alkalinity production by watersheds and lakes, and uses watershed area to lake area ratio as a direct estimator of relative akalinity contributions. The second approach is based on existing models for in-lake alkalinity generation estimated from sulfate retention. Projections from the two methods are comparable,

APA, Harvard, Vancouver, ISO, and other styles

17

Melekestseva, Irina, Vasiliy Kotlyarov, Gennadiy Tret’yakov, et al. "The Heavy-Metal Fingerprint of the Irinovskoe Hydrothermal Sulfide Field, 13°20′ N, Mid-Atlantic Ridge." Minerals 12, no. 12 (2022): 1626. http://dx.doi.org/10.3390/min12121626.

Full text

Abstract:

A number of Cd-, Pb-, Ag- and Sb(±As)-bearing minerals are found in the Zn-rich smoker chimneys of the Irinovskoe hydrothermal sulfide field, 13°20′ N, Mid-Atlantic Ridge. Sulfide samples were studied using optical microscopy, SEM/EDS, XRD, EBDS, ICP-MS and thermodynamic approaches. The chimneys consist of major sphalerite (including Cd-bearing type with up to 41.38 wt% Cd) and wurtzite, subordinate opal, pyrite, chalcopyrite and Fe-oxyhydroxides, as well as accessory native sulfur, baryte, secondary copper sulfides, galena, CdS phase (most likely hawleyite), pyrrhotite, isocubanite, acanthite

APA, Harvard, Vancouver, ISO, and other styles

18

Nweke, IA, CN Mbah, and PSO Okoli. "Tillage Methods and Wood Ash Effect on Soil Properties and Yield of Castor." Greener Journal of Agricultural Sciences 6, no. 11 (2016): 331–41. https://doi.org/10.15580/GJAS.2016.11.120516209.

Full text

Abstract:

The effect of tillage methods and rates of wood ash on soil properties and yield of castor bean plant was studied in field trial at Abakaliki in three different planting seasons. The experiment was a split plot in randomized complete block design with three tillage methods (mound, ridge, flat) and four rates of wood ash (0tha<sup>-1</sup>, 2tha<sup>-1</sup>, 4tha<sup>-1</sup>  and 6tha<sup>-1</sup>) replicated three times. Crop start version 7.2 was used to analyse data collected and mean separation was done using least significant difference (LSD) at 5% alpha level. The results obtained

APA, Harvard, Vancouver, ISO, and other styles

19

Martinez, Robert J., Yanling Wang, Melanie A. Raimondo, Jonna M. Coombs, Tamar Barkay, and Patricia A. Sobecky. "Horizontal Gene Transfer of PIB-Type ATPases among Bacteria Isolated from Radionuclide- and Metal-Contaminated Subsurface Soils." Applied and Environmental Microbiology 72, no. 5 (2006): 3111–18. http://dx.doi.org/10.1128/aem.72.5.3111-3118.2006.

Full text

Abstract:

ABSTRACT Aerobic heterotrophs were isolated from subsurface soil samples obtained from the U.S. Department of Energy's (DOE) Field Research Center (FRC) located at Oak Ridge, Tenn. The FRC represents a unique, extreme environment consisting of highly acidic soils with cooccurring heavy metals, radionuclides, and high nitrate concentrations. Four hundred isolates obtained from contaminated soil were assayed for heavy metal resistance, and a smaller subset was assayed for tolerance to uranium. The vast majority of the isolates were gram-positive bacteria and belonged to the high-G+C- and low-G+C

APA, Harvard, Vancouver, ISO, and other styles

20

Saltel, Frédéric, Eva Mortier, Vesa P. Hytönen та ін. "New PI(4,5)P2- and membrane proximal integrin–binding motifs in the talin head control β3-integrin clustering". Journal of Cell Biology 187, № 5 (2009): 715–31. http://dx.doi.org/10.1083/jcb.200908134.

Full text

Abstract:

Integrin-dependent adhesion sites consist of clustered integrins that transmit mechanical forces and provide signaling required for cell survival and morphogenesis. Despite their importance, the regulation of integrin clustering by the cytoplasmic adapter protein talin (Tal) and phosphatidylinositol (PI)-4,5-biphosphate (PI(4,5)P2) lipids nor their dynamic coupling to the actin cytoskeleton is fully understood. By using a Tal-dependent integrin clustering assay in intact cells, we identified a PI(4,5)P2-binding basic ridge spanning across the F2 and F3 domains of the Tal head that regulates in

APA, Harvard, Vancouver, ISO, and other styles

21

Nuzhdaev, I. A., S. N. Rychagov, S. O. Feofilaktov, and D. K. Denisov. "Peculiarities of the Magnetic Field of Geothermal Systems of the Pauzhetsky Area (South Kamchatka)." Вулканология и сейсмология 17, no. 2 (2023): 33–51. http://dx.doi.org/10.31857/s0203030622060049.

Full text

Abstract:

Based on many years of research, maps of magnetic field anomalies ΔTa for large geothermal systems of the Pauzhetsky region of South Kamchatka were constructed. Magnetic fields have both general characteristics and individual features for each research object. In the area of Nizhne-Koshelevsky steam-dominated geothermal field identified a system of linear negative magnetic field anomalies, confined to thermal controlling discontinuous tectonic disturbances. Pauzhetsky geothermal field is characterized by a heterogeneous structure of the anomalous magnetic field ΔTa: NW region is marked by a qu

APA, Harvard, Vancouver, ISO, and other styles

22

Spain, Anne M., Aaron D. Peacock, Jonathan D. Istok, et al. "Identification and Isolation of a Castellaniella Species Important during Biostimulation of an Acidic Nitrate- and Uranium-Contaminated Aquifer." Applied and Environmental Microbiology 73, no. 15 (2007): 4892–904. http://dx.doi.org/10.1128/aem.00331-07.

Full text

Abstract:

ABSTRACT Immobilization of uranium in groundwater can be achieved through microbial reduction of U(VI) to U(IV) upon electron donor addition. Microbial community structure was analyzed in ethanol-biostimulated and control sediments from a high-nitrate (>130 mM), low-pH, uranium-contaminated site in Oak Ridge, TN. Analysis of small subunit (SSU) rRNA gene clone libraries and polar lipid fatty acids from sediments revealed that biostimulation resulted in a general decrease in bacterial diversity. Specifically, biostimulation resulted in an increase in the proportion of Betaproteobacteria (10%

APA, Harvard, Vancouver, ISO, and other styles

23

Novotný, Radek, Věra Fadrhonsová, and Vít Šrámek. "Long-Term Monitored Norway Spruce Plots in the Ore Mountains—30 Years of Changes in Forest Health, Soil Chemistry and Tree Nutrition after Air Pollution Calamity." Plants 13, no. 17 (2024): 2379. http://dx.doi.org/10.3390/plants13172379.

Full text

Abstract:

The Ore Mountains were historically one of the most polluted areas in Europe, where high sulphur dioxide concentrations and a high level of atmospheric deposition led to a vast decline in Norway spruce stands in the mountain ridge plateau. In this article, we evaluate the trends in the atmospheric deposition load, soil chemistry, tree nutrition, crown defoliation and height increment in a network of twenty research plots monitored for last thirty years in this region. The decrease in sulphur and nitrogen deposition was most pronounced at the end of 1990s. Extreme values of sulphur deposition (

APA, Harvard, Vancouver, ISO, and other styles

24

Lane, Darius J. R., and Des R. Richardson. "Frataxin, a molecule of mystery: trading stability for function in its iron-binding site." Biochemical Journal 426, no. 2 (2010): e1-e3. http://dx.doi.org/10.1042/bj20091959.

Full text

Abstract:

What are the structural implications for iron binding by frataxin, the mitochondrial protein whose decreased expression results in Friedreich's ataxia? Though frataxin has been shown to be essential for proper handling of iron within mitochondria (e.g. for iron–sulfur cluster and haem biosynthesis), its exact molecular function remains unclear. In this issue of the Biochemical Journal, Correia and colleagues investigate the relationship between structure and function at the putative iron-binding site of Yfh1 (yeast frataxin). Using a host of Yfh1 combination point mutants, the authors observe

APA, Harvard, Vancouver, ISO, and other styles

25

Brzoska, Ryann M., Richard E. Edelmann, and Annette Bollmann. "Physiological and Genomic Characterization of Two Novel Bacteroidota Strains Asinibacterium spp. OR43 and OR53." Bacteria 1, no. 1 (2022): 33–47. http://dx.doi.org/10.3390/bacteria1010004.

Full text

Abstract:

Asinibacterium spp. (Family Chitinophagaceae, Phylum Bacteroidota) are abundant in environments contaminated with heavy metals. We characterized the physiology and genome of two Asinibacterium species to elucidate their ability to survive and grow at ambient conditions in the uranium-contaminated environments. Both strains were able to grow at pH 4.5 or 50 mM nitrate under aerobic conditions and did not grow with alternative electron acceptors under anaerobic conditions. Asinibacterium sp. OR53 grew in medium with uranium concentrations up to 300 µM uranium while Asinibacterium sp. OR43 could

APA, Harvard, Vancouver, ISO, and other styles

26

Vasil'chuk, Yurij Kirillovich, Alexander Pavlovich Ginzburg, Nadine Arkad'evna Budantseva, and Jessica Yur'evna Vasil'chuk. "Cryogenic Soils in the Chara River Valley (Transbaikalia)." Арктика и Антарктика, no. 3 (March 2022): 54–91. http://dx.doi.org/10.7256/2453-8922.2022.3.38689.

Full text

Abstract:

The object of the study are the cryogenic soils located within the Chara valley. We attributed soils in a post-pyrogenic sparse larch forest on the terrace of the Chara River, to the type of gleyzems (Gleysols), subtypes - permafrost cryogenically ferruginized cryoturbated and permafrost cryogenically ferruginized post-pyrogenic. The field diagnostics of these two soils is ambiguous, since the soil profiles contain some morphological features that make it possible to identify them as podburs (Entic Podzols): a bright red color of the BF horizon, a sandy loam texture, containing less than 19% o

APA, Harvard, Vancouver, ISO, and other styles

27

Abdellatif, Ahmed M., Ahmed I. Ateya, Khadiga A. Hasan, Mansour A. Alghamdi, and Fatma A. Madkour. "Spatiotemporal Ultrastructural, Histological, and Morphometric Changes in the Buccal Cavity of Grass Carp (Ctenopharyngodon idella) During Fingerling, Yearling, and Adult Stages." Animals 14, no. 21 (2024): 3162. http://dx.doi.org/10.3390/ani14213162.

Full text

Abstract:

Grass carp (Ctenopharyngodon idella) is a Cyprinid fish of aquacultural and research importance. The buccal cavity represents the gateway of the digestive tract. The present study investigated the adaptational changes involving various components of the buccal cavity of fingerling (three months posthatching, mph), yearling (12 mph), and adult (48 mph) C. idella using scanning electron microscopy, histology, and morphometry. The upper and lower lips appeared uninterrupted at the three studied stages and were limited caudally by the upper and lower jaws. The jaw epithelium was the thickest part

APA, Harvard, Vancouver, ISO, and other styles

28

Goodwin, A. M., H. G. Thode, C. L. Chou, and S. N. Karkhansis. "Chemostratigraphy and origin of the late Archean siderite–pyrite-rich Helen Iron Formation, Michipicoten belt, Canada." Canadian Journal of Earth Sciences 22, no. 1 (1985): 72–84. http://dx.doi.org/10.1139/e85-006.

Full text

Abstract:

The 2.7 Ga old Helen Iron Formation (HIF) with its uniquely large siderite–Pyrite orebody conformably overlies chemically altered rhyolite–dacite pyroclastic rocks, including an ottrelite-bearing alteration pipe, the product of exhalative venting in freshly accumulated pyroclastics. HIF, in turn, is conformably overlain by pillowed mafic lava flows.HIF internal stratigraphy is conformable from lower massive siderite–sulfide through middle sulfidic, carbonaceous chert, to upper magnetitic chert. Major- and trace-element and carbon- and sulfur-isotope data demonstrate cyclic fluctuations in chem

APA, Harvard, Vancouver, ISO, and other styles

29

Lobusev, A. V., V. V. Pykhalov, V. A. Bochkarev, M. А. Lobusev, and V. V. Kudinov. "The genesis and placement of acidic components in the composition of free and dissolved gas in deposits of different ages between Astrakhan arch and Karpinski ridge." Environmental Protection in Oil and Gas Complex, no. 5 (2021): 15–22. http://dx.doi.org/10.33285/2411-7013-2021-5(302)-15-22.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Perkins, A. S., J. A. Mercer, N. A. Jenkins, and N. G. Copeland. "Patterns of Evi-1 expression in embryonic and adult tissues suggest that Evi-1 plays an important regulatory role in mouse development." Development 111, no. 2 (1991): 479–87. http://dx.doi.org/10.1242/dev.111.2.479.

Full text

Abstract:

Evi-1 is a putative protooncogene first identified as a common site of retroviral integration in murine myeloid leukemias. It encodes a 145 × 10(3) Mr nuclear DNA-binding protein that contains ten zinc-finger motifs separated into two domains, as well as an acidic domain. These features suggest that Evi-1 encodes a transcriptional regulatory protein. In Drosophila, zinc-finger proteins such as Kruppel are involved in body plan patterning, and exhibit a spatially restricted pattern of expression in the embryo. To determine if Evi-1 may be involved in morphogenetic processes in the mouse embryo,

APA, Harvard, Vancouver, ISO, and other styles

31

Green, Stefan J., Om Prakash, Thomas M. Gihring, et al. "Denitrifying Bacteria Isolated from Terrestrial Subsurface Sediments Exposed to Mixed-Waste Contamination." Applied and Environmental Microbiology 76, no. 10 (2010): 3244–54. http://dx.doi.org/10.1128/aem.03069-09.

Full text

Abstract:

ABSTRACTIn terrestrial subsurface environments where nitrate is a critical groundwater contaminant, few cultivated representatives are available to verify the metabolism of organisms that catalyze denitrification. In this study, five species of denitrifying bacteria from three phyla were isolated from subsurface sediments exposed to metal radionuclide and nitrate contamination as part of the U.S. Department of Energy's Oak Ridge Integrated Field Research Challenge (OR-IFRC). Isolates belonged to the generaAfipiaandHyphomicrobium(Alphaproteobacteria),Rhodanobacter(Gammaproteobacteria),Intraspor

APA, Harvard, Vancouver, ISO, and other styles

32

Sánchez-España, Javier, Ana M. Nieto Castillo, M. Pilar Mata, Javier Martínez-Martínez, and Jose F. Mediato. "Fluorite and Gibbsite Solubility Controls the Vertical Transport of Fluoride and Aluminum during Rainwater Percolation through Ashfall Deposits in La Palma (Canary Islands, Spain)." Minerals 14, no. 4 (2024): 338. http://dx.doi.org/10.3390/min14040338.

Full text

Abstract:

This study addresses the in situ mobility of fluoride and aluminum in two different ashfall deposits accumulated during the 2021 eruption of the Tajogaite volcano (La Palma, Canary Islands, Spain), which were exposed to contrasting conditions of ambient humidity and precipitation. We selected one site to the east of the volcanic emission center, located near the top of Cumbre Vieja Ridge and exposed to continuous humidity and rain, and another site to the west of the volcano situated in a lowland and characterized by much drier conditions. The mobility of fluoride and aluminum is markedly diff

APA, Harvard, Vancouver, ISO, and other styles

33

Nasir, Sobhi, Nikos Economou, Khalil Al Hooti, Talal Al Hosni, Sean Spratley, and Brian Spratley. "The Mahout Structure in the Central Desert of Oman: A Possible Simple Impact Crater." Geosciences 13, no. 12 (2023): 363. http://dx.doi.org/10.3390/geosciences13120363.

Full text

Abstract:

The present work reports on the first evidence of a possible hypervelocity impact crater in the Sultanate of Oman. The impact origin of the structure is determined based on field observations, microscopic observations of shatter cones, planar fractures (PFs) and feather features (FFs) in quartz, calcite, and feldspar, and melt-bearing polymict breccias with various types of melts. The structure consists of an elliptical bowl-shaped ridge 750 m long and 550 m wide, oriented roughly north-northeast to south-southwest. The elliptical shape and relief asymmetry indicate an oblique collision. The p

APA, Harvard, Vancouver, ISO, and other styles

34

Chan, D. C., A. Wynshaw-Boris, and P. Leder. "Formin isoforms are differentially expressed in the mouse embryo and are required for normal expression of fgf-4 and shh in the limb bud." Development 121, no. 10 (1995): 3151–62. http://dx.doi.org/10.1242/dev.121.10.3151.

Full text

Abstract:

Mice homozygous for the recessive limb deformity (ld) mutation display both limb and renal defects. The limb defects, oligodactyly and syndactyly, have been traced to improper differentiation of the apical ectodermal ridge (AER) and shortening of the anteroposterior limb axis. The renal defects, usually aplasia, are thought to result from failure of ureteric bud outgrowth. Since the ld locus gives rise to multiple RNA isoforms encoding several different proteins (termed formins), we wished to understand their role in the formation of these organs. Therefore, we first examined the embryonic exp

APA, Harvard, Vancouver, ISO, and other styles

35

盧冠瑋, 盧冠瑋. "Radiological Evaluation of Marginal Bone Loss Around Sandblasted and Acid-etched (SLA) and Modified Surface (SLActive) Tissue-level Implants Surfaces: A Retrospective 5-year Follow-up Study." Journal of Periodontics and Implant Dentistry 6, no. 1 (2023): 001–9. http://dx.doi.org/10.53106/261634032023050601001.

Full text

Abstract:

<p>Objectives: Implant placement in atrophic ridges with severe horizontal bone deficiency without adequate bony housing around the defects remains a significant clinical challenge. The aim of this case series is to evaluate the effectiveness of alveolar ridge splitting (ARS) with simultaneous implant placement. Materials and Methods: Four patients with severe horizontal bone deficiency in atrophic ridges received ARS with simultaneous implant placement. The stability of the widened ridges was evaluated by superimposition of initial and postoperative CBCT images. The ridge thickness at b

APA, Harvard, Vancouver, ISO, and other styles

36

Bollmann, Annette, Anthony V. Palumbo, Kim Lewis, and Slava S. Epstein. "Isolation and Physiology of Bacteria from Contaminated Subsurface Sediments." Applied and Environmental Microbiology 76, no. 22 (2010): 7413–19. http://dx.doi.org/10.1128/aem.00376-10.

Full text

Abstract:

ABSTRACT The majority of environmental microorganisms cannot be grown by traditional techniques. Here we employed, and contrasted with conventional plating, an alternative approach based on cultivation of microorganisms inside diffusion chambers incubated within natural samples, followed by subculturing in petri dishes. Using this approach, we isolated microorganisms from subsurface sediments from the Field Research Center (FRC) in Oak Ridge, TN. The sediments were acidic and highly contaminated with uranium, heavy metals, nitrate, and organic pollutants. Phylogenetic analysis of 16S rRNA gene

APA, Harvard, Vancouver, ISO, and other styles

37

Olfert, Niels Christian. "The Theoretical Potential of Hondsrug Glacial Rock Dust as Soil Remediator in The Netherlands." European Journal of Environment and Earth Sciences 4, no. 1 (2023): 20–26. http://dx.doi.org/10.24018/ejgeo.2023.4.1.369.

Full text

Abstract:

Agriculture in the Netherlands is a major source of ammonia (NH3) emissions. Deposited nitrogen levels in the Netherlands reached 2-3 times their critical value at the start of 2020. Excess nitrogen in soil may cause declines in biodiversity and ecosystemic disequilibrium. This may lead to acidic and decalcified soils that are less capable of retaining nutrients. The mineral fines in rock dust are proven agents in soil remediation and remineralization. Glacial moraine deposits are a branded source of rock dust and are contained in the glacial till of the “Hondsrug” area, a boulder clay ridge i

APA, Harvard, Vancouver, ISO, and other styles

38

Ermakov, N. B., Yu V. Plugatar, and V. D. Leiba. "Classification of beech (Fagus orientalis) forests of the Western Caucasus." Vegetation of Russia, no. 47 (2023): 112–32. http://dx.doi.org/10.31111/vegrus/2023.47.112.

Full text

Abstract:

The classification of oriental-beech (Fagus orientalis) forests of the Western Caucasus was developed on the basis of quantitative analysis (Ward’s method, Euclidian distance) of 200 relevés (Fig. 2) and comparative syntaxonomic analysis. All Caucasian beech forests were attributed to the class Carpino–Fagetea sylvaticae Jakucs ex Passarge 1968 and Euxine order Rhododendro pontici–Fagetalia orientalis Passarge 1981. The associations of floristically poor beech forests occurring on the acidic bedrocks were included in the alliance Fagion orientalis Soó 1964. These are Orobo–Fagetum orientalis P

APA, Harvard, Vancouver, ISO, and other styles

39

Sigmon, J. T., F. S. Gilliam, and M. E. Partin. "Precipitation and throughfall chemistry for a montane hardwood forest ecosystem: potential contributions from cloud water." Canadian Journal of Forest Research 19, no. 10 (1989): 1240–47. http://dx.doi.org/10.1139/x89-189.

Full text

Abstract:

This study analyzed the chemical composition of cloud water, bulk precipitation, and throughfall in a hardwood forest at the top of a watershed in the Virginia Blue Ridge Mountains to further investigate canopy–atmosphere interactions. The composition of both cloud water and bulk precipitation was dominated by H+, NH4+, SO42−, and NO3−. On average, cloud water was four times more acidic than bulk precipitation (251 vs. 63 μequiv./L in 1986 and 158 vs. 40 µequiv./L in 1987, respectively) and had higher NH4+/Ca2+ ratios (22.2 vs. 0.7 in 1986 and 9.4 vs. 1.2 in 1987, respectively), indicating pos

APA, Harvard, Vancouver, ISO, and other styles

40

Fazlutdinova, A. I., N. V. Sukhanova, and L. A. Gaysina. "Diversity of soil diatom communities of Frolikhinsky State Nature Reserve." Theoretical and Applied Ecology, no. 2 (June 25, 2024): 175–84. http://dx.doi.org/10.25750/1995-4301-2024-2-175-184.

Full text

Abstract:

The species composition of soil diatoms in Frolikhinsky State Nature Reserve was studied. Flora of diatoms algae was represented with 128 taxa of 4 classes, 12 orders, 23 families and 49 genera. The greatest diversity of species was found on the bank of the Bireya River (77 species), and the lowest – on the Barguzinsky ridge pass (3 species). In most species and intraspecific taxa of diatoms (97%) found in the reserve, the occurrence rate varied from 10 to 40%. An occurrence rate above 40% was noted only in four taxa that were identified as leading: Pinnularia borealis (80%), Adlafia bryophila

APA, Harvard, Vancouver, ISO, and other styles

41

Dekov, Vesselin, Tatyana Gendler, Olessya Polishchuk, and Valerii Bagin. "Fe- and Fe-Mn- oxyhydroxides in metalliferous sediments from ultra-fast spreading centre axial zone - 21o S East Pacific Rise." Geologica Balcanica 24, no. 4 (1994): 71–87. http://dx.doi.org/10.52321/geolbalc.24.4.71.

Full text

Abstract:

Detailed Mössbauer, XRD, DTA, SAED and SEM studies on metalliferous sediments from the axial zone of the ultra-fast spreading East Pacific Rise (20°30'-22°00' S) were performed. Uniform sediments with Fe3+ hydroxide metal-bearing part are formed, which reflects the oxidation regime of environment during sedimentation. The Mössbauer spectra of the sediments represent monotype broadened doublets with the following parametre values of the computer fitting using the twodoublet model: δE1=0.36, ΔE1=0.55, δE2=0.37, ΔE2=0.97 mm/s. The hydroxides from the metalliferous sediments studied are represente

APA, Harvard, Vancouver, ISO, and other styles

42

Plusnin, A. V., Z. L. Motova, I. V. Afonin, et al. "Results of Studying the Material Composition and U-Pb (LA-ICP-MS) Age of Detrital Zircons From Terrigenous Rocks of the Vanavara and Oskobinskaya Formations of the Kamov Arch of the Baikit Antelise." Georesources 27, no. 1 (2025): 236–60. https://doi.org/10.18599/grs.2025.1.26.

Full text

Abstract:

The paper presents the results of studies on sandstones from the Vanavara and Oskobinskaya formations, which are part of the Nepa and Torskiy regional stratigraphic horizons, respectively. These formations were studied using the core from the Yur-92 deep well, located within the Kamov Arch of the Baikit Anteclise on the Siberian Platform. A detailed lithological description of a core with a total thickness of 89 meters is provided. For 13 sandstone samples, the following studies were conducted: petrographic analysis of thin sections, definition of major petrogenic oxide content, definition of

APA, Harvard, Vancouver, ISO, and other styles

43

Brueckner, Stefanie M., Gregory Johnson, Stephanie Wafforn, et al. "Potential for Volcanogenic Massive Sulfide Mineralization at the A6 Anomaly, North-West British Columbia, Canada: Stratigraphy, Lithogeochemistry, and Alteration Mineralogy and Chemistry." Minerals 11, no. 8 (2021): 867. http://dx.doi.org/10.3390/min11080867.

Full text

Abstract:

The Middle Jurassic A6 Anomaly is located 30 km southeast of Eskay Creek, north-central British Columbia and consists of thick, altered felsic igneous rocks overlain by a mafic volcano-sedimentary package. Lithogeochemistry on igneous rocks, X-ray diffraction on altered felsic units, and electron probe microanalysis and secondary ion mass spectrometry on illite and quartz were applied to explore the volcanogenic massive sulfide (VMS) potential, characterize alteration, and determine fluid conditions at the A6 Anomaly. Lithogeochemistry revealed calc-alkaline rhyodacite to trachyte of predomina

APA, Harvard, Vancouver, ISO, and other styles

44

Olteanu, Dragos, Xiaofen Liu, Wen Liu, et al. "Increased Na+/H+exchanger activity on the apical surface of a cilium-deficient cortical collecting duct principal cell model of polycystic kidney disease." American Journal of Physiology-Cell Physiology 302, no. 10 (2012): C1436—C1451. http://dx.doi.org/10.1152/ajpcell.00063.2011.

Full text

Abstract:

Pathophysiological anomalies in autosomal dominant and recessive forms of polycystic kidney disease (PKD) may derive from impaired function/formation of the apical central monocilium of ductal epithelia such as that seen in the Oak Ridge polycystic kidney or orpk ( Ift88Tg737Rpw) mouse and its immortalized cell models for the renal collecting duct. According to a previous study, Na/H exchanger (NHE) activity may contribute to hyperabsorptive Na+movement in cilium-deficient (“mutant”) cortical collecting duct principal cell monolayers derived from the orpk mice compared with cilium-competent (“

APA, Harvard, Vancouver, ISO, and other styles

45

Özbay, Kinem, and Sevgi Güneş-Durak. "Investigation of the removal of physicochemical pollutants in the Kızılırmak River by aluminum sulfate and iron sulfate coagulants." Pollution Study 6, no. 2 (2025): 3319. https://doi.org/10.54517/ps3319.

Full text

Abstract:

This study evaluated the optimal dosage and pH for removing turbidity, chloride, alkalinity, total dissolved solids (TDS), and sulfate from Kızılırmak River water using iron sulfate and aluminum sulfate (10–60 mg/L). Maximum turbidity removal efficiencies were 98.84% for iron sulfate and 78.99% for aluminum sulfate at pH 4.5. Chloride removal was 77.12% at pH 7.0 for aluminum sulfate and 74.33% at pH 6.0 for iron sulfate. Aluminum sulfate reduced alkalinity by 90.40% at pH 8.0, while iron sulfate achieved 99.21% removal at pH 4.5. TDS removal efficiencies were 99.58% for aluminum sulfate at pH

APA, Harvard, Vancouver, ISO, and other styles

46

Mitrofanov, I. Yu, L. V. Pugacheva, O. N. Antsiferova, and N. A. Smirnova. "Spring-summer sowing of winter rye on dry lands." Agrarian science, no. 9 (November 2, 2021): 104–7. http://dx.doi.org/10.32634/0869-8155-2021-352-9-104-107.

Full text

Abstract:

Relevance. The article is devoted to the actual problem of the spring-summer seeding of winter rye on drained lands.Methods and results. The studies were carried out in 2017–2020 at the experimental site of VNIIMZ (Tver region), drained by a closed drain. The soil of the experimental site is sod-podzolic light loamy gleyic slightly acidic, the content of humus is 1.8–2.4%, exchangeable potassium and available phosphorus content is increased and high. In field experiments, the effectiveness of spring-summer sowing dates for winter rye in a fallow field of crop rotation was studied with a ridge

APA, Harvard, Vancouver, ISO, and other styles

47

Cullen, David A., Haoran Yu, David Arregui-Mena, et al. "(Invited) Electron Microscopy Investigation of Electrolyzer Degradation." ECS Meeting Abstracts MA2023-02, no. 42 (2023): 2129. http://dx.doi.org/10.1149/ma2023-02422129mtgabs.

Full text

Abstract:

Low-temperature proton exchange membrane water electrolyzers (PEMWEs) are a key technology for green hydrogen production from renewable energy sources. Developing efficient and durable components for the membrane electrode assembly (MEA) at the heart of the electrolyzer is critical for meeting DOE’s Hydrogen Shot target of $1 per kg of hydrogen by 2031. Of key interest to the efficiency and longevity of the electrolyzer is the anode-side of the MEA, where the costly iridium (Ir) catalyst is prone to dissolution at the high potentials and acidic conditions experienced in the cell. Further, the

APA, Harvard, Vancouver, ISO, and other styles

48

Susetyono, Mardhiawan Tri, and Lucas Donny Setijadji. "Study of Active and Fossil Hydrothermal Systems in Ijen Caldera Complex and Merubetiri Mountains, East Java." Indonesian Journal of Economic Geology 1, no. 1 (2021): 23–38. http://dx.doi.org/10.51835/ijeg.2021.1.1.340.

Full text

Abstract:

Ore deposits formed at subduction zone are associated with magmatism activities that are represented by volcanic activities at the surface. In the Eastern Sunda Arc, one of active volcanic activity can be found in Ijen Caldera Complex. The complex has hydrothermal volcanic manifestations with a very acidic pH. Meanwhile in the south of Ijen Complex, there is ancient volcanic complex called Merubetiri Mountains that is proven to be well-mineralized at Tumpangpitu as high sulfidation and porphyry-style mineralizations. An understanding of hydrothermal activity and volcanic landforms in active vo

APA, Harvard, Vancouver, ISO, and other styles

49

Kim, A. Reum, Bong Soon Lim, Jaewon Seol, et al. "Diagnostic Assessment and Restoration Plan for Damaged Forest around the Seokpo Zinc Smelter, Central Eastern Korea." Forests 12, no. 6 (2021): 663. http://dx.doi.org/10.3390/f12060663.

Full text

Abstract:

Research Highlights: This study was carried out to diagnose the forest ecosystem damaged by air pollution and to then develop a restoration plan to be used in the future. The restoration plan was prepared by combining the diagnostic assessment for the damaged forest ecosystem and the reference information obtained from the conservation reserve with an intact forest ecosystem. The restoration plan includes the method for the amelioration of the acidified soil and the plant species to be introduced for restoration of the damaged vegetation depending on the degree of damage. Background and Object

APA, Harvard, Vancouver, ISO, and other styles

50

Sahore, Ritu, Raymond R. Unocic, Marm Dixit, Mengya Li, Hunter Andrews, and Benjamin Manard. "Towards a Mechanistic Understanding of Transition-Metal Dissolution Phenomenon in Lithium-Ion Batteries." ECS Meeting Abstracts MA2024-01, no. 2 (2024): 420. http://dx.doi.org/10.1149/ma2024-012420mtgabs.

Full text

Abstract:

Dissolution of transition metals (TMs) from the layered NMC-type cathodes (LiNixMnyCozO2) occurs during cycling of lithium-ion full cells and is known to accelerate their capacity fade. This is because the dissolved metals migrate to the graphite anode and deposit there, where they accelerate irreversible active-lithium loss to reductive side reactions. The dissolution is known to get aggravated by cycling the cells to a greater upper cut-off voltage (UCV), where larger amounts of metals are typically found to be accumulated at the anode after long term cycling. At higher UCV oxygen loss from

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!