Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "Quaternary" wg kryterium: Temat

  Lista filtrów
Wyrównaj
Wyświetlanie 1-15 z 160
Tytuł:
4-methyl-4-[2-(naphthalene)-2-oxoethyl] morpholin-4-ium iodide as a water soluble photoinitiator
Jodek 4-metylo-4-[2-(naftalen-2-ylo)-2-oksoetylo]morfolin-4-iowy jako rozpuszczalny w wodzie fotoinicjator
Autorzy:
Ozcan, Fatma
Dogruyol, Zekeriya
Keskin Dogruyol, Sevnur
Powiązania:
https://bibliotekanauki.pl/articles/24202835.pdf
Data publikacji:
2023
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
Tematy:
photopolymerization
water-soluble photoinitiators
quaternary ammonium salt
fotopolimeryzacja
fotoinicjatory rozpuszczalne w wodzie
czwartorzędowe sole amoniowe
Opis:
Quaternary ammonium salt namely 4-methyl-4-[2-(naphthalen-2-yl)-2-oxoethyl] morpholin-4-ium iodide (WSMPM) was synthesized and characterized. High molar absorptivity at 347 nm (1910 L • mol-1 • cm-1) and good solubility in distilled water (10-2 M) allows WSMPM to be used as an effective photoinitiator also in water-soluble systems. Photopolymerization of acrylamide monomer with WSMPM (10-3 M) and a tertiary amine (N-methyldiethanolamine), resulted in 84.4% monomer to polymer conversion. Based on laser photolysis and electron spin resonance, a photoinitiator mechanism was proposed.
Otrzymano i scharakteryzowano czwartorzędową sól amoniową – jodek 4-metylo-4-[2-(naftalen-2-ylo)-2-oksoetylo]morfolin-4-iowy (WSMPM). Związek charakteryzuje się dużą wartością molowego współczynnika absorpcji promieniowania o długości fali 347 nm (1910 L • mol-1 • cm-1) oraz dobrą rozpuszczalnością w wodzie, co pozwala na jego zastosowanie jako efektywnego fotoinicjatora, także w układach wodnych. W przypadku fotopolimeryzacji akryloamidu w obecności WSMPM i trzeciorzędowej aminy (N-metylodietanoloaminą) uzyskano ponad 84-proc. konwersję monomeru do polimeru. Na podstawie fotolizy laserowej i elektronowego rezonansu spinowego zaproponowano mechanizm fotoinicjacji.
Źródło:
Polimery; 2023, 68, 4; 215--220
0032-2725
Pojawia się w:
Polimery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adsorption of quaternary ammonium salt hydrophobic modifiers on the α-quartz (001) surface: a density functional theory study
Autorzy:
Liu, Chunfu
Wang, Weitao
Wang, Han
Zhu, Chenyu
Ren, Bao
Powiązania:
https://bibliotekanauki.pl/articles/24085768.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
α-quartz (001) surface
quaternary ammonium salt
density functional theory
adsorption mechanism
Opis:
To investigate the adsorption mechanism of quaternary ammonium salt on the α-quartz (001) surface, the adsorption models of hydrophobic modifiers 1231, 1431, 1631 and 1831 were constructed and simulated using the density functional theory (DFT). Results indicate that the adsorption energy of quaternary ammonium salt increases with the increase of carbon chain length, and the adsorption en-ergy reaches the maximum at 18 carbon atoms; however, the adsorption capacity of 1631 is weak owing to the carbon chain deflection. Based on the Mulliken bond population analysis, reagent 1831 has the strongest interaction with α-quartz (001) surface compared with 1231, 1431 and 1631; and during the adsorption process, charge transfer and electrostatic attraction occur between the reagent and α-quartz (001) surface with similar degrees of charge transfer observed. This study emphasizes that electrostatic attraction plays a key role in the adsorption process, while the week hydrogen bonding plays a second-ary role.
Źródło:
Physicochemical Problems of Mineral Processing; 2023, 59, 3; art. no. 170260
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
First record of tempestites from Quaternary lacustrine deposits in the Ağrı Basin (Eastern Anatolia, Türkiye) : palaeoclimatological and palaeogeographic implications
Autorzy:
Üner, Serkan
Powiązania:
https://bibliotekanauki.pl/articles/27324244.pdf
Data publikacji:
2023
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
tempestite
hummocky cross-stratification
Quaternary
Eastern Anatolia
Opis:
Several event layers have been identified in lacustrine deposits in the AErI Basin of Anatolia (E Türkiye). Sedimentological and palaeontological data newly indicate a storm-induced origin for some of them. The sedimentary structures in three sections, a few tens of metres apart from each other laterally, such as hummocky cross-stratification, wave-generated cross-bedding, parallel bedding, erosional surfaces, and graded bedding, which are considered characteristic of tempestites, are clearly present. Additionally, fining-upwards units and biogenic escape structures located at different levels of these sections indicate a similar origin. The vertical variations in layer thickness, grain size, and sedimentary structures in these sedimentary sections indicate fluctuating hydrodynamic conditions during deposition, while lateral decrease in the size and wavelength of the structures reflects deepening. This interpretation of storm-induced deposition is compatible with regional palaeoclimatological and palaeogeographical data, and is supported by evidence of Quaternary storm-induced sedimentation in adjacent lacustrine basins in the region.
Źródło:
Geological Quarterly; 2023, 67, 2; art. no. 13
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of quaternary ammonium salts on mechanical properties of light-cured resin dental composites
Wpływ czwartorzędowych soli amoniowych na właściwości mechaniczne fotoutwardzalnych kompozytów dentystycznych
Autorzy:
Zalega, Maja
Nowak, Joanna
Bociong, Kinga
Powiązania:
https://bibliotekanauki.pl/articles/24202838.pdf
Data publikacji:
2023
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
Tematy:
dental composites
quaternary ammonium salts
mechanical properties
kompozyty dentystyczne
czwartorzędowe sole amoniowe
właściwości mechaniczne
Opis:
The composite consisting of bis-GMA/UDMA/HEMA/TEGDMA monomer mixture forming a polymer matrix filled with silanized silica (45 wt%) was modified with CTAB or DODAB quaternary ammonium salts (0.5‒2.0 wt%). The hardness, flexural strength as well as diametrical tensile strength of the composite before and after modification were evaluated. The type and amount of salt affected the hardness, flexural strength, and shrinkage stress; however, they did not influence the diametral tensile strength of the tested composites.
Kompozyt składający się z mieszaniny monomerów bis-GMA/UDMA/HEMA/TEGD¬MA tworzących osnowę polimerową napełnioną silanizowaną krzemionką (45% mas.) modyfikowano czwartorzędowymi solami amoniowymi CTAB lub DODAB (w ilości 0,5‒2,0% mas.). Zbadano twardość, wytrzymałość na zginanie oraz wytrzymałość na średnicowe rozciąganie kompozytu przed i po modyfikacji. Rodzaj i ilość soli miały wpływ na twardość, wytrzymałość na zginanie oraz naprężenia skurczowe, nie wpłynęły natomiast na wytrzymałość na średnicowe rozciąganie badanych kompozytów.
Źródło:
Polimery; 2023, 68, 4; 193--205
0032-2725
Pojawia się w:
Polimery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Causes of groundwater level and chemistry changes in an urban area; a case study of Warsaw, Poland
Autorzy:
Krogulec, Ewa
Gruszczyński, Tomasz
Kowalczyk, Sebastian
Małecki, Jerzy J.
Porowska, Dorota
Sawicka, Katarzyna
Trzeciak, Joanna
Wojdalska, Anna
Zabłocki, Sebastian
Zaszewski, Daniel
Powiązania:
https://bibliotekanauki.pl/articles/24024702.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
urban area
Quaternary aquifer
Oligocene aquifer
groundwater level changes
infiltration
groundwater chemistry
Warsaw
obszar miejski
czwartorzędowe piętro wodonośne
oligoceńskie piętro wodonośne
zmiany poziomu wód gruntowych
infiltracja
chemizm wód podziemnych
Warszawa
Opis:
The presented studies focus on changes in groundwater levels and chemistry, and the identification of important factors influencing these changes on short- and long-term scales in urban areas. The results may be useful for rational and sustainable groundwater planning and management in cities. The studies concerned three aquifers: (1) the shallow Quaternary aquifer, (2) the deep Quaternary aquifer, and (3) the Oligocene aquifer in the capital city of Warsaw (Poland). The spatial variability of groundwater recharge was determined and its changes in time were characterized. The characteristics of groundwater levels were based on long-term monitoring series. The results indicate that urban development has caused overall reduction in infiltration recharge (from 54 to 51 mm/year), which is particularly clear in the city suburbs and in its centre, where land development has significantly densified during the last 30 years. Studies of groundwater levels indicate variable long-term trends. However, for the shallowest aquifer, the trends indicate a gradual decrease of the groundwater levels. In the case of the much deeper Oligocene aquifer, groundwater table rise is observed since the 1970s (averagely c. 20 m), which is related with excessive pumping. Based on the studied results, the groundwater chemistry in the subsurface aquifer indicates strong anthropogenic influence, which is reflected in multi-ionic hydrogeochemical types and the occurrence of chemical tracers typical of human activity. The Oligocene aquifer is characterized by a chemical composition indicating the influence of geogenic factors.
Źródło:
Acta Geologica Polonica; 2022, 72, 4; 495--517
0001-5709
Pojawia się w:
Acta Geologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morena szaflarska w świetle nowych danych z odsłonięć i wierceń w 100-lecie jej odkrycia
Szaflary moraine in the light of new data from exposures and drilling on the 100th anniversary of its discovery
Autorzy:
Wójcik, Antoni
Powiązania:
https://bibliotekanauki.pl/articles/2087064.pdf
Data publikacji:
2022
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Czwartorzęd
Podhale
tatrzańskie lodowce
morena
kamieniołom w Szaflarach
Quaternary
Podhale Region
Tatra glaciers
moraine
quarry in Szaflary
Opis:
In the northern part of the Podhale Region, nearly 100 years ago, Matkowski (1924, 1928) described gravels exposed in a quarry in Szaflary and considered them to be moraine sediments - Szaflar moraine. Romer (1929) confirmed this interpretation of the sediments. Later studies of Halicki (1930), Klimaszewski (1948, 1988), Birkenmajer (1976) and Birkenmajer and Stuchlik (1975) completely excluded the possibility of moraines in this area and showed that these sediments have are of fluvioglacial origin. Comparing the quarry's ranges due to exploitation, it was found that the authors could observe various deposits exposed during the progress of exploitation towards the west. In the profiles of trenches for new buildings to the NW from the quarry, clays containing sands and gravels and individual boulders and blocks of quartzite and granite with a diameterof0.8 to 1.2m were found. The exposed erratics exactly correspond to the description of the moraine by Matkowski (1924, 1928) from the quarry in Szaflary. In addition, in the recently drilled Nowy Targ PIG-2 borehole, similarly developed pieces were found at a depth of19.7-69.5 m. Combining archival data and new facts from drilling and exposures, a view can be proposed that, during the Southern Polish Glaciations, the Tatra glaciers reached the Nowy Targ Basin and perhaps the foothills of the Gorce Mts, which was already suggested by Rehman (1895), Zapatowicz (1913) and Matkowski (1928).
Źródło:
Przegląd Geologiczny; 2022, 70, 6; 458--467
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of Groundwater Pollution Vulnerability, Hazard and Risk in a Semi-Arid Region
Autorzy:
Haied, Nadjib
Khadri, Samira
Foufou, Atif
Azlaoui, Mohamed
Chaab, Salah
Bougherira, Nabil
Powiązania:
https://bibliotekanauki.pl/articles/2027767.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
Mio-plio-quaternary aquifer
Djelfa syncline
DRASTIC
WQI
GIS
pollution risk
Opis:
The Mio-plio-quaternary aquifer of the Djelfa Syncline is part of a region in Algeria which is characterized by the lack of surface water resources and located in a semi-arid climate. Since alluvial aquifers, and among them our aquifer, are the most vulnerable because of thier direct exposure to the pollution caused by the infiltrated pollutants, this work focused on the assessement of groundwater pollution vulnerability, hazard and risk. Thus, several methods were used; for this purpose, such as the DRASTIC and WQI methods mapped using a GIS. The results obtained clearly show a low to moderate vulnerability. The DRASTIC model and its validation based on the correlation with WQI revealed a low correlation ($WQ_I$vs $D_I$ : 0.221). Since the vulnerability model does not match with the groundwater quality, pollution risk was assessed by combining vulnerabilty and hazard (i.e, water quality). The risk map illustrated three levels ranging from low to high risk. This map should be helpful in decision making and groundwater management through avoiding high risk areas.
Źródło:
Journal of Ecological Engineering; 2021, 22, 10; 1-13
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of groundwater vulnerability using the DRASTIC model: A case study of Quaternary catchment A21C, Limpopo River Basin, South Africa
Autorzy:
Moges, Simeneh S.
Dinka, Megersa O.
Powiązania:
https://bibliotekanauki.pl/articles/1844324.pdf
Data publikacji:
2021
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
A21C Quaternary catchment
DRASTIC model
groundwater vulnerability
sensitivity analysis
South Africa
Opis:
Groundwater is a vital resource for domestic, agricultural, industrial activities and ecosystem services. Despite its multiple purposes, the resource is under significant threat owing to increasing contamination from anthropogenic activities and climate change. Hence, in order to ensure the reliability and sustainable use of groundwater for the present and future generations, effective management of groundwater (quality and quantity) is highly important. This can be achieved by identifying areas more vulnerable to contamination and implementing protective measures. The present study aims at assessing the vulnerability of groundwater using GIS-based DRASTIC index in the Quaternary catchment (A21C) within Limpopo River Basin. The vulnerability index varied from 87 to 207. About 53.6% (408 km2) of the catchment area also exhibited high risk of groundwater contamination mostly in central, north-eastern and western part of the sub-catchment. The medium and low vulnerability classes cover only 18.1% (137.5 km2) and 21.7% (165.1 km2) of the study area, respectively. The shallow groundwater at the Doornfontein Campus belongs to very high vulnerability area. The sensitivity analysis indicates that depth to water level, recharge, aquifer media, soil and topography are the important contributors to vulnerability assessment. The correlation analysis performed to validate the final vulnerability map shows a moderate positive correlation, indicating the model’s applicability to the urbanised environment. The study indicates an area that is highly vulnerable to pollution, and hence protective measures are necessary for sustainable management of the groundwater resource in the study area. The result of this study can also be further improved and verified by using other vulnerability assessment models.
Źródło:
Journal of Water and Land Development; 2021, 49; 35-46
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kataliza przeniesienia międzyfazowego jako nowoczesna technika w syntezie organicznej
Phase-transfer catalysis as a modern technique in organic synthesis
Autorzy:
Siewniak, Agnieszka
Chrobok, Anna
Powiązania:
https://bibliotekanauki.pl/articles/1853730.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Chemiczne
Tematy:
kataliza przeniesienia międzyfazowego
czwartorzędowe sole amoniowe
poli glikole etylenowe
katalizatory chiralne przeniesienia międzyfazowego
phase-transfer catalysis
quaternary ammonium salts
polyethylene glycols
chiral phase-transfer catalysts
Opis:
Phase-transfer catalysis (PTC) has been already known for 60 years and has an established position both on a laboratory and industrial scale. It is an energy-saving technique, ensuring high yields and selectivity under mild conditions. PTC is successfully used, among others, in the pharmaceutical, polymer, agrochemical industries, for the production of dyes, fragrances and flavors, to name a few. Currently, the development of phase-transfer catalysis is focused mainly on the search for active catalysts as well as extending the scope of its applications. In particular, catalysts immobilized on an insoluble carrier, which can be easily separated from the reaction mixture and recycled many times, are of great interest. The growing demand for chiral compounds has resulted in the development of phase-transfer catalysts which, while retaining the advantages of conventional PTC, will allow to obtain a product with high enantiomeric excess. This work characterizes the phase-transfer catalysis and presents examples of its applications in organic synthesis.
Źródło:
Wiadomości Chemiczne; 2021, 75, 9-10; 1297-1315
0043-5104
2300-0295
Pojawia się w:
Wiadomości Chemiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The role of binary and ternary systems in protein studies
Rola systemów binarnych I ternarnych w badaniu białek
Autorzy:
Ławrynowicz, Julian
Nowak-Kępczyk, Małgorzata
Suzuki, Osamu
Powiązania:
https://bibliotekanauki.pl/articles/1837641.pdf
Data publikacji:
2021-08-12
Wydawca:
Łódzkie Towarzystwo Naukowe
Tematy:
binary physical structure
ternary physical structure
quaternary physical structure
quinary physical structure
senary physical structure
alloy
pentacene
polymer
protein
peptide
amino acid
Galois extension
Riemann surface
binarna struktura fizyczna
ternarna struktura fizyczna
kwaternarna struktura fizyczna
kwinarna struktura fizyczna
sennarna struktura fizyczna
stop
pentacen
polimer
białko
peptyd
aminokwas
rozszerzenie Galois
powierzchnia Riemanna
Opis:
Various aspects of binary, ternary, quaternary, quinary, and senary structures for alloys, polymers and, in particular, proteins are studied. We refer to quinary and senary structures in some polymers indicating the role of total energy maxima in the infrared and Raman activity energy spectra. Decomposition of quinary structures to ternary structures is discussed. A complex analytical method of binary and ternary Galois extension is proposed as well as its realization in terms of Riemann surfaces. Slightly wavy behaviour of the system of hexagons in a polymer leaf is investigated
Rozważamy rozmaite aspekty struktur binarnych, ternarnych, kwaternarnych i senarnych dla stopów, polimerów i protein. W szczególności odnosimy się do struktur kwinarnych i senarnych w niektórych polimerach wskazując na rolę maksimów energii w spektrach podczerwieni i aktywności Ramana. Dyskutujemy rozkład struktur kwinarnych do ternarnych. Proponujemy zespoloną metodę analityczną dla binarnych i ternarnych rozszerzeń Galois, jak również ich realizację na powierzchniach Riemanna. Omawiamy lekko falujące zachowanie układu sześciokątów w liściu polimeru
Źródło:
Bulletin de la Société des Sciences et des Lettres de Łódź, Série: Recherches sur les déformations; 2020, 70, 1; 169-187
1895-7838
2450-9329
Pojawia się w:
Bulletin de la Société des Sciences et des Lettres de Łódź, Série: Recherches sur les déformations
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of metal corrosion in wood treated with new-generation water-borne preservatives
Autorzy:
Can, Ahmet
Sivrikaya, Hüseyin
Taşcioğlu, Cihat
Powiązania:
https://bibliotekanauki.pl/articles/342791.pdf
Data publikacji:
2020
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna
Tematy:
alkaline copper quaternary (ACQ)
boric acid (BA)
micronized copper quaternary (MCQ)
nano boron (NB)
corrosion test
Opis:
In this study, the corrosion performances of ammonium copper quaternary (ACQ) and boric acid (BA) wood preservatives were investigated, with micronized copper quaternary (MCQ) and nano boron (NB) used as reference materials. In the study, Scots pine (Pinus sylvestris L.) wood samples were impregnated according to the full-cell process method with ACQ at 2.4% concentration, BA at 4% and MCQ and NB at 1%. The ACQ- and BA-impregnated samples were then impregnated for a second time using five different water-repellent materials: tall oil, linseed oil, sodium silicate, methyl hydrogen silicone and N'-N-(1,8- naphthalyl)hydroxylamine. Polyethylene glycol (PEG) 600 and aluminum sulfate were introduced as single impregnations in the form of homogeneous mixtures with ACQ and BA. The corrosion properties of the impregnated and control samples, including metal weight loss (MWL) and corrosion depth, were examined. The MWL values of the ACQ-impregnated samples showed an increase compared to the control group. The MWL values of the MCQ-impregnated samples were lower than those of the samples impregnated with ACQ, whilst the MWL values of the BA-impregnated samples were higher than those of the samples impregnated with NB.
Źródło:
Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2020, 62, 205; 59-68
1644-3985
Pojawia się w:
Drewno. Prace Naukowe. Doniesienia. Komunikaty
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Erosion and accumulation phases during the last glacial-interglacial cycle : a case study of the terrace system of the Odra and Osobłoga rivers (southern Poland)
Autorzy:
Wójcicki, Krzysztof Jan
Pawelec, Halina
Malik, Ireneusz
Woskowicz-Ślęzak, Beata
Moska, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/2058537.pdf
Data publikacji:
2020
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
fluvial processes
river terraces
Late Quaternary
OSL
southern Poland
Opis:
In the Odra and Osobłoga River valleys in the vicinity of the town of Krapkowice, a system of morphological levels is present which is exceptionally extensive compared to other such systems in southern Poland. The extent, origins and chronology of these levels have been the subject of many controversies. In the light of current research, the terraces, which are situated on average 14.5-13, 12-10, 8-6, 6-4 and 3-1 metres above the river level, were formed in the post-Wartanian interval. The main factor driving their development was erosion, which compensated for the effects of large-scale aggradation that had occurred during the anaglacial phase of the Odranian Glaciation (MIS 8) dated to 261 ±15 ka. The impact of climatic conditions on the trends towards fluvial erosion or accumulation was only of secondary importance. According to OSL dating, successive phases of vertical stabilisation of the valley floor occurred ~118.8 ±8.3, 87.7 ±5.7 and 42.0 ±2.0 ka. In the meantime, erosion intensified, which resulted in the formation of lower terrace levels. During the climatic minimum of the Upper Plenivistulian (21.5 ±1.5 ka), under conditions of the delivery of sheet-wash-generated sediment, the aggradation of distal reaches of the Odra River valley was locally marked. During the Late Vistulian and Holocene, erosive tendencies continued, which were reflected by the fact that the surfaces of subsequent inset alluvial fills were situated ever lower. In the light of dating results, it can be concluded that during the colder periods correlated with the Rederstall Stadial (MIS 5b) and with the Hasselo Stadial (MIS 3), a braided river was present in the river valleys examined, which was most probably accompanied by permafrost. During the Eemian Interglacial (MIS 5e), during the Late Vistulian Interstadials and in the Holocene, it was a meandering river.
Źródło:
Geological Quarterly; 2020, 64, 1; 104--119
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mollusks from Pliocene and Pleistocene seep deposits in Leyte, Philippines
Autorzy:
Kiel, S.
Aguilar, Y.M.
Kase, T.
Powiązania:
https://bibliotekanauki.pl/articles/2082228.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Gastropoda
Bivalvia
chemosymbiosis
Neogene
Quaternary
Indo-Pacific Ocean
Opis:
We report 44 mollusk species from four Pliocene to Pleistocene seep deposits in Leyte Island, Philippines. The bivalves are represented by 30 species, of which eleven are new (Conchocele majimai, Conchocele visayaensis, Channelaxinus antipoloensis, Dulcina liogliogensis, Dulcina magoi, Elliptiolucina fernandoi, Lucinoma canudai, Lucinoma velosoi, Lucinoma tinagoensis, Lucinoma kosatorea, Archivesica pastori), six are extant species known from the Philippines and surrounding waters (Meganodontia acetabulum, Lucinoma dulcinea, Lucinoma aff. kastoroae, Vesicomya margotae, “Pliocardia” ticaonica, “Pliocardia” indica), and five are extant species known from Japanese waters (Bathymodiolus securiformis, Divalucina soyoae, Archivesica kawamurai, Pliocardia kuroshimana, Elliptiolucina ingens). Remarkable about those latter species is that only a single one of them occurs as fossil in Japan, despite Japan’s rich fossil record of seep communities. This together with the large number of new species with close relatives in Japan suggests that at least part of the modern Japanese vent and seep fauna originated in Philippine waters. More than one third (twelve) of the bivalve species reported here belong to the family Lucinidae, which is also very species-rich in shallow waters around the Philippines. Four new gastropods are described: Margarites hayashii, Vetulonia philippinensis, Cataegis ramosi, and Provanna azurini.
Źródło:
Acta Palaeontologica Polonica; 2020, 65, 3; 589-627
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of N, N-bis (2-hydroxyethyl) -N-methyl dodecyl ammonium chloride as the novel collector in selective flotation separation of quartz and hematite
Autorzy:
Liu, Wenbao
Liu, Wengang
Zhao, Qiang
Wang, Xinyang
Duan, Hao
Peng, Xiangyu
Wang, Benying
Powiązania:
https://bibliotekanauki.pl/articles/949694.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
quaternary ammonium salts
high surface activity
quartz
hematite
interaction mechanisms
flotation separation
Opis:
A quaternary ammonium salt, N, N-bis (2-hydroxyethyl)-N-methyl dodecyl ammonium chloride (BHMDC), with high surface activity, was screened and firstly introduced in the reverse flotation of hematite ores based on Density Functional Theory (DFT) calculation and surface tension measurement. The interaction mechanism of BHMDC on the surfaces of quartz and hematite was studied by zeta potential measurement, X-ray photoelectron spectroscopy (XPS) and Fourier transforms infrared spectroscopy (FTIR), respectively. The results of DFT calculation and surface tension measurement indicated that BHMDC had higher selectivity and hydrophobicity than dodecylamine (DDA). The analyses of zeta potential measurement, FTIR, and XPS demonstrated that the adsorption of BHMDC on hematite and quartz surfaces were mainly dependent on hydrogen bonding and electrostatic interaction. Due to the more active sites (O atoms), the weaker charge and larger size of polar groups, BHMDC had better simulation results in performance than DDA, especially in selectivity. The flotation tests showed that BHMDC exhibited better flotation performance, which was consistent with the results of DFT calculation. And the efficient separation of hematite and quartz within the wide pH value range (4.0-10.0) was determined, which was also confirmed by zeta potential measurement. It also indicated that BHMDC was an excellent collector in the reverse flotation of hematite ores with great industrial potential, which could obtain the concentrate with the Fe grade of 65.37% and recovery of 88.92%
Źródło:
Physicochemical Problems of Mineral Processing; 2020, 56, 2; 286-299
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wyzwania kartografii geologicznej w Polsce
Challenges of geological mapping in Poland
Autorzy:
Marks, Leszek
Jóźwik, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/2076100.pdf
Data publikacji:
2020
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
kartografia geologiczna
baza geologiczna
GeoSciML
specyfikacja techniczna
INSPIRE
International Quaternary Map of Europe
QUAME
geological mapping
geological database
Opis:
Geological mapping is a highly interpretive and scientific process that produces a range of map products for many different uses, basically for sustainable land and mineral resources management. This is a primary and principal task of all geological surveys in the world. The establishment of the Polish Geological Institute in 1919 founded a basic framework for geological mapping in Poland. After the Second World War, an extensive production of geological (serial, regional and thematic) maps at different scales in atlases and scientific publications was initiated. Within the past 30 years, geographic information system (GIS) technology has begun to change geologic mapping by providing software tools, a use of which permits geological data to be electronically stored, displayed, queried and analysed in conjunction with a seemingly infinite variety of other data types. The fully automatic process of map generalization and its founding on hierarchic geological vocabularies will enable flexible presentation of geological data while passing from one scale to another. New technological advances and international standards in description, collection, exchange and visualisation ofgeological data, as well as its connection with external resources, will result in substantial enrichment of information in databases and will create new possibilities in search and use of data in the Web.
Źródło:
Przegląd Geologiczny; 2020, 68, 5; 330--337
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 160

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies