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Wyszukujesz frazę "nanotechnology," wg kryterium: Temat


Tytuł:
Zarządzanie jakością i bezpieczeństwem w przemyśle nanotechnologicznym zgodnie z celami zrównoważonego rozwoju
Quality and safety management in the nanotechnology industry in line with sustainable development goals
Autorzy:
Piekara, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/31836520.pdf
Data publikacji:
2024-06-03
Wydawca:
Szkoła Główna Handlowa w Warszawie. Kolegium Zarządzania i Finansów
Tematy:
quality management
nanotechnology
sustainable development
zarządzanie jakością
nanotechnologia
zrównoważony rozwój
Opis:
Cel. Nanotechnologia jest dziedziną, w której bezpieczeństwo oraz zgodność z normami jakościowymi odgrywają kluczową rolę. Celem pracy było wskazanie zastosowania komór rękawicowych w systemie zarządzania jakością i bezpieczeństwem w przemyśle nanotechnologicznym. Metody. Podstawę case study stanowiły materiały wewnętrzne jednego z producentów komór rękawicowych. Zastosowano także wywiad pogłębiony z doborem celowym (producent i użytkownicy urządzeń) dla obszernej analizy badanego zjawiska oraz lepszego zrozumienia zachodzących procesów. Wyniki. Linia komór rękawicowych do ochrony operatora gwarantuje bezpieczeństwo podczas pracy z materiałami szkodliwymi. Kluczowymi cechami systemu chroniącymi użytkownika są wysoka klasa szczelności, aktywny system kontroli ciśnienia roboczego oraz efektywny system filtracji HEPA. Wnioski. Wśród interesariuszy przemysłu nanotechnologicznego dostrzega się konieczność dążenia do realizacji celów zrównoważonego rozwoju. Jednym z jej kierunków jest produkcja nanomateriałów zgodnych z oczekiwaniami klienta, ale przy zachowaniu standardów bezpieczeństwa pracowników oraz ochronie środowiska przed emisją i niepożądaną migracją nanomateriałów i środków stosowanych w ich syntezie.
Raising safety standards in the nanotechnology industry is the path towards Quality 5.0. In the case of the production of nanomaterials, attention is drawn to the need to follow safety rules to avoid contamination or release of nanomaterials into the work environment or water. The work aims to indicate the use of glove boxes in the quality and safety management system in the nanotechnology industry. The basis for the case study was the internal materials of one of the glove box manufacturers. An indepth interview with purposeful selection (producer and device users) was also applied to analyze the studied phenomenon extensively and understand the ongoing processes better. The operator protection glove box line guarantees safety when working with harmful materials. The key features of the system that protect the user are a high tightness class, an active working pressure control system and an effective HEPA filtration system. In conclusion, stakeholders of the nanotechnology industry recognize the need to strive to achieve sustainable development goals. One of its key directions is the production of nanomaterials in line with customer expectations while maintaining employee safety standards and environmental protection against the emission and undesirable migration of nanomaterials and agents used in their synthesis.
Źródło:
Studia i Prace Kolegium Zarządzania i Finansów; 2024, 197; 215-226
1234-8872
2657-5620
Pojawia się w:
Studia i Prace Kolegium Zarządzania i Finansów
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis of silver nanoparticles by aqueous extract of Zingiber officinale and their antibacterial activities against selected species
Autorzy:
Hussain, Zawar
Jahangeer, Muhammad
ur Rahman, Shafiq
Ihsan, Tamanna
Sarwar, Abid
Ullah, Najeeb
Aziz, Tariq
Alharbi, Metab
Alshammari, Abdulrahman
Alasmari, Abdullah F.
Powiązania:
https://bibliotekanauki.pl/articles/27315653.pdf
Data publikacji:
2023
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
Nanotechnology
Antibacterial activity
Silver-nanoparticles
green synthesis
Ginger
Opis:
Silver nanoparticles have special plasmonic and antibacterial characteristics that make them efficient in a variety of commercial medical applications. According to recent research, chemically synthesized silver nanoparticles are harmful even in low concentrations. It was crucial to identify appropriate synthesis methods that may have low costs and be nontoxic to the environment. Zingiber officinale (ginger) extracts used to prepare silver nanoparticles were inexpensive and environmentally friendly, and the best physicochemical characteristics were analyzed. Silver nanoparticles were characterized by using UV-visible spectroscopy, Scanning electron microscopy (SEM), and X-ray diffraction (XRD). The surface Plasmon resonance peak at 425 nm was observed using UV-Visible spectroscopy. Scanning electron microscopy observed that the nanoparticles were spherical and ranged in size from 5 to 35 nm. The XRD pattern values of 2θ: 38.2° , 46.3° , and 64.58° are used to determine the planes (111), (200), and (220). The silver nanoparticle’s existence was verified by the face-centered cubic (FCC). Silver nanoparticles were found to have antibacterial efficacy against gram-positive Staphylococcus and gram-negative bacteria such as Pseudomonas aeruginosa, Klebsiella Aerogenes, Salmonella, Staphylococcus and Escherichia coli. The antibacterial activity of silver nanoparticles was observed using the agar well diffusion (AWD) method at three different concentrations (100 μg/ ml, 75 μg/ml, and 50 μg/ml). The zone of inhibition measured against the bacterial strains pseudomonas Aeruginosa, Klebsiella aerogenes, Escherichia coli, Salmonella and Staphylococcus which were (18.4±1.25 mm, 16.9±0.74 mm, 14.8±1.25 mm), (16.8±0.96 mm, 14.6±0.76 mm, 14.0±1.15 mm), (19.7±0.76 mm, 18.2±0.66 mm, 15.4±1.15 mm), (16.6±0.67 mm, 14.2±0.23 mm, 12.8±0.78 mm) and (12±0.68 mm, 10±0.20 mm, 08±0.15 mm). These nanoparticles’ potent antibacterial properties may enable them to be employed as nanomedicines for a variety of gramnegative bacterial illness treatments.
Źródło:
Polish Journal of Chemical Technology; 2023, 25, 3; 23--30
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Szarańcza z Apokalipsy św. Jana – owad zwykły czy niezwykły? Eksperyment filologiczny: od natury do nanotechnologii
Locusts in the Book of Revelation— Ordinary or Extraordinary Insects? A Philological Experiment: From Nature to Nanotechnology
Саранча из Апокалипсиса Иоанна Богослова – насекомое обыкновенное или необыкновенное? Филологический эксперимент: от природы к нанотехнологии
Autorzy:
Ojcewicz, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/21150506.pdf
Data publikacji:
2023
Wydawca:
Wydawnictwo Uniwersytetu Śląskiego
Tematy:
Апокалипсис Иоанна Богослова
саранча
космическое вмешательство
нанотехнология
Apokalipsa św. Jana
szarańcza
interwencja kosmitów
nanotechnologia
Book of Revelation
locust
cosmic intervention
nanotechnology
Opis:
Zdaniem autora szarańcza, o której mówi się w Apokalipsie św. Jana, żadną miarą nie reprezentuje zwykłych owadów zaliczanych w systematyce do rodziny prostoskrzydłych (Acrididae) i znanych np. z Księgi Wyjścia z opisu plag egipskich. O ile szarańcza ze Starego Testamentu zachowywała się w sposób niszczycielski w całkowitej zgodzie ze swą biologiczną naturą, o tyle „szarańcza” w wizji św. Jana przypomina inteligentne mikroroboty skonstruowane przez dysponentów zaawansowanej technologii, najprawdopodobniej przez samych kosmitów. Autor twierdzi ponadto, że św. Jan na skutek obiektywnych ograniczeń podyktowanych szczątkową wiedzą o zaawansowanych technologiach kosmicznych nie miał innego wyjścia niż wyrażać swe myśli w prostych kategoriach zrozumiałych przede wszystkim dla niego samego. Stąd porównanie nanotechnologicznych „owadów” do znanej apostołowi pospolitej szarańczy oraz skorpionów — zwierząt z obszaru, jaki zamieszkiwał, i których zwyczaje biologiczne na pewno dobrze znał.
По мнению автора, саранча, о которой говорится в Апокалипсисе Иоанна Богослова, ни в коей мере не является обыкновенными насекомыми согласно классификации насекомых, принадлежащими к семейству настоящие саранчовые (Acrididae) и известными, например, по Книге Исхода из описания египетских казней. Если ветхозаветная саранча была разрушительной силой в полном согласии со своей биологической природой, то «саранча» в видении Иоанна Богослова является скорее всего примером умных микророботов, созданных обладателями чрезвычайно продвинутых технологий, скорее всего – самими пришельцами из космоса. Автор утверждает, что Иоанн Богослов, ограниченный тогдашним состоянием знаний о Вселенной, не мог выражать свои мысли с помощью терминов, принадлежащих продвинутым технологиям, и поэтому находил для собственных видений наименования и образы, которые были понятны в первую очередь ему самому. Отсюда и сравнение нанотехнологических «насекомых» со знакомой апостолу саранчой и скорпионами – животными из окружающей среды, в которой жил, а также внешний вид и биологические повадки которых он несомненно хорошо знал.
In the author’s opinion, locusts mentioned in the Book of Revelation by no means represent thespecies of common insects classified in the family Acrididae, also known from the Book of Exodus and its description of the plagues of Egypt. As far as the locusts in the Old Testament are concerned, they were a destructive force completely in line with their biological nature; however, the “locusts” in Saint John’s vision are depicted rather as smart micro-robots created by wielders of highly advanced technologies – most probably by extraterrestrials. The author claims that Saint John, limited by the then state of knowledge about the universe, was unable to express his thoughts in the categories of advanced technologies; therefore, he found names and images for his visions, which were understandable primarily to himself. Hence, the comparison of nanotechnological “insects” to locusts and scorpions the apostle was familiar with, as these animals are native to the area where he lived, and he must have been well aware of their natural habits.
Źródło:
Zoophilologica. Polish Journal of Animal Studies; 2023, 1 (11); 1-26
2719-2687
2451-3849
Pojawia się w:
Zoophilologica. Polish Journal of Animal Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Nanomaterial Type on Water Disinfection Using Data Mining
Autorzy:
Hamdan, Mohammad
Khalil, Rana Haj
Abdelhafez, Eman
Ajib, Salman
Powiązania:
https://bibliotekanauki.pl/articles/24201710.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
water disinfection
artificial neural network
nanotechnology
data mining
Opis:
Multiple linear regression and artificial neural network (ANN) models were utilized in this study to assess the type influence of nanomaterials on polluted water disinfection. This was accomplished by estimating E. coli (E.C) and the total coliform (TC) concentrations in contaminated water while nanoparticles were added at various concentrations as input variables, together with water temperature, PH, and turbidity. To achieve this objective, two approaches were implemented: data mining with two types of artificial neural networks (MLP and RBF), and multiple linear regression models (MLR). The simulation was conducted using SPSS software. Data mining was revealed after the estimated findings were checked against the measured data. It was found that MLP was the most promising model in the prediction of the TC and E.C concentration, s followed by the RBF and MLR models, respectively.
Źródło:
Journal of Ecological Engineering; 2023, 24, 4; 244--251
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anodic growth of copper oxide nanostructures in glow discharge
Autorzy:
Breus, A.
Abashin, S.
Lukashov, I.
Serdiuk, O.
Powiązania:
https://bibliotekanauki.pl/articles/2201134.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
nanotechnology
plasma synthesis
copper oxide nanostructure
glow discharge
nanotechnologia
synteza plazmowa
nanostruktura tlenku miedzi
wyładowanie jarzeniowe
Opis:
Purpose: Application of plasma glow discharge to copper oxide nanostructure growth is studied. The simplicity of the proposed technique may be beneficial for the development of new plasma reactors for large-scale production of diverse metal oxide nanostructures. Design/methodology/approach: Copper sample was placed on anode of a setup designed to ignite plasma glow discharge. The proposed approach allows eliminating the negative effects of ion bombardment, like sputtering and generation of defects on a surface of the growing nanostructures, but preserves the advantages of thermal growth. The growth process was explained in terms of thermal processes interaction occurring on a surface of the anode with the glow discharge plasma. Findings: Plasma treatment resulted in generation of reach and diverse nanostructures that was confirmed by SEM images. Nanowire-like, flower-like, anemone-like nanostructures and nanodisks composed into the nanoassemblies are observed; the nanostructures are associated with microbabbles on CuO layer. These findings allow concluding about the possible implementation of the proposed method in industry. Research limitations/implications: The main limitation is conditioned by the lack of heat supplied to the anode, and absence of independent control of the heat and ion fluxes; thus, the additional heater should be installed under the anode in order to expand the nomenclature of the nanospecies in the future studies. Practical implications: High-productivity plasma process in copper oxide nanostructures synthesis was confirmed in this research. It may be applied for field emitter and supercapacitor manufacturing. Originality/value: Oxide nanostructure synthesis is conducted by use of a simple and well-known glow discharge technique in order to expand the production yield and diversity of nanostructure obtained in the processes of thermal growth.
Źródło:
Archives of Materials Science and Engineering; 2022, 113, 3; 24--33
1897-2764
Pojawia się w:
Archives of Materials Science and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Druga rewolucja w konstrukcji lamp rentgenowskich
The second revolution in the design of X-ray tubes
Autorzy:
Jezierski, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/2171856.pdf
Data publikacji:
2022
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
lampa wyładowcza
lampa rentgenowska Coolidge’a
źródło elektronów
termoemisja
emisja polowa
nanotechnologia MEMS
nanorurki węglowe
mikroostrze
discharge tubes
Coolidge X-ray tube
electron source
thermoemission
field emission
MEMS
nanotechnology
carbon nanotubes
micro-tips
Opis:
W artykule przedstawiono najnowsze osiągnięcia w konstrukcji lamp rentgenowskich, które można określić drugą rewolucją. Mianowicie podstawowy problem jaki stwarzają dotychczasowe rozwiązania wynikające ze stosowania termicznego źródła elektronów (m.in. problem chłodzenia, sterowania pracą lampy) został rozwiązany poprzez wykorzystanie nanotechnologii do konstrukcji innowacyjnych źródeł elektronów w oparciu o emisję polową (nanorurki węglowe czy mikro-ostrza).
The article presents the latest achievements in the design of X-ray tubes, which can be described as the second revolution. Namely, the basic problem posed by the current solutions resulting from the use of a thermal electron source (including the problem of cooling, tubes control) has been solved by using nanotechnology to construct innovative electron sources based on field emission (carbon nanotubes or micro-tips).
Źródło:
Postępy Techniki Jądrowej; 2022, 4; 23--30
0551-6846
Pojawia się w:
Postępy Techniki Jądrowej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Enhancement of Solar Water Disinfection Using Nanocatalysts
Autorzy:
Hamdan, Mohammad
Al Louzi, Razan
Al Aboushi, Ahmad
Abdelhafez, Eman
Powiązania:
https://bibliotekanauki.pl/articles/2202290.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
solar water disinfection
nanotechnology
water treatment
solar energy
Opis:
Solar water disinfection (SODIS) is a simple and low-cost method of increasing water quality. However, it takes about 6 hours of exposure to solar radiation. The elimination of harmful pathogenic germs from drinking water can be accelerated using a combination of sun disinfection and nanotechnology. In this study, a hybrid water purification technique using solar water disinfection, Titanium Oxide (TiO2), and natural mineral clays was investigated. TiO2, natural kaolin clay nanoparticles, and a mixture of TiO2 and natural clay were added to contaminated wastewater containers at different concentrations. After that, the containers were exposed to sun light for different time intervals. Samples were then collected from all tests to measure the total counts of Total Coliform and Escherichia coli (E. coli) using the IDEXX system. The results showed that the addition of TiO2 and natural kaolin clay to wastewater with solar water disinfection reduced the total count of the pathogenic microorganisms and decreased the time needed time for the disinfection process compared to using solar energy alone. The results also showed that the optimum concentration of the TiO2, which yielded the shortest purification time and lowest levels of pathogenic microorganisms, was 0.006 g/ml. In co ntrast, the most effective concentratio n of natural clay was 0.0015 g/ml. Moreover, the results showed that the optimum concentration of the mixture of TiO2 and natural clay, which speeds up the purification time an d lowest the level of pathogen ic microorganisms was 0.006 g/ml for TiO2 and 1.2 g/ml for the natural clay.
Źródło:
Journal of Ecological Engineering; 2022, 23, 12; 14--20
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance Enhancement of a Photovoltaic Module by Passive Cooling Using Water-Based Aluminum Oxide Nano-Fluid
Autorzy:
Hamdan, Mohammad A.
Powiązania:
https://bibliotekanauki.pl/articles/2086398.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
PV cooling
nanotechnology
PV performance
fined PV
Opis:
The performance of a PV (photovoltaic) module relies heavily on the operating temperature. The aim of the current study was to improve PV performance by passive cooling with nano-coated aluminum fins attached to the backside of the photovoltaic panels. Four identical PV panels were installed side by side for simultaneous measurements. The first one (B) is a basic PV that was used for comparison purposes, the second one (N) PV, which is coated with water-based Al2O3 nano-fluid, the third is finned PV (F), with fins being attached to its backside and the Al2O3 nano-fluid coated fins are attached to the backside of the fourth PV (FN). The hourly electrical generated power by each PV, I-V, and I_V curves for each PV were recorded and stored using I-V Checker. In addition, the backside temperature of each PV and the ambient temperature were measured on an hourly basis using K-type thermocouples; the measured temperature values were stored in a data logger. It was found that the (FN) PV gave the best performance compared to the base unit, with an increase in the generated power by 5.77%, followed by the nanocoated (N) PV with an increase of 2.14% and finally the finned (F) PV with an increase of 0.74%. Furthermore, the PV with the nano-coated fins exhibits the lower temperature 31°C, followed by the nano-coated PV, and finally the fined PV, with the backside average temperature of the basic unit being 39°C.
Źródło:
Journal of Ecological Engineering; 2022, 23, 4; 276--283
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Ability of Rhizopus stolonifer MR11 to Biosynthesize Silver Nanoparticles in Response to Various Culture Media Components and Optimization of Process Parameters Required at Each Stage of Biosynthesis
Autorzy:
Khleifat, Khaled
Alqaraleh, Moath
Al-limoun, Muhamad
Alfarrayeh, Ibrahim
Khatib, Rasha
Qaralleh, Haitham
Alsarayreh, Ahmad
Al Qaisi, Yaseen
Hajleh, Maha Abu
Powiązania:
https://bibliotekanauki.pl/articles/2173339.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
nanotechnology
silver nanoparticles
Rhizopus stolonifer MR11
optimization
characterization
Opis:
One of the most important roles for nanotechnology concerns is the development of optimizable experimental protocols for nanomaterials synthesis. The formation of silver nanoparticles (AgNPs) was supported by Rhizopus stolonifer MR11, which was isolated from olive oil mill soil samples. The ability of R. stolonifer MR11 to biosynthesize silver nanoparticles in response to various components of different culture media was tested. Furthermore, the conditions under which the reducing biomass filtrate was obtained, as well as the conditions of the bio-reduction reaction of AgNO3 into AgNPs, were investigated. The fungal biomass filtrate of the strain Rhizopus stolonifer MR11 was capable of converting silver nitrate into AgNPs, as evidenced by the color change of the fungal filtrates. UV-Vis spectrophotometer, TEM, Zeta potential, Zeta sizer, FT-IR, and XRD analyses were used to characterize the AgNPs. TEM analysis revealed that the silver nanoparticles were 1–35 nm in size. R. stolonifer MR11 produced the maximum AgNPs when grown for 18 hours at 36 °C in media with starch and yeast extract as the sole carbon and nitrogen sources, respectively. The reducing biomass filtrate was obtained by incubating 5 g mycelial biomass in deionized water with a pH of 6 for 48 hours at 30 °C. The optimal reduction conditions of the biosynthesis reaction were determined by adding 1.0 mM AgNO3 to a pH 5 buffered mycelial filtrate and incubating it for 72 hours at 33 °C. The current study’s findings highlighted the importance of process parameters at each stage for optimal AgNPs biosynthesis.
Źródło:
Journal of Ecological Engineering; 2022, 23, 8; 89--100
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The extraordinary gravity of three atom 4π-components and 1,3-dienes to C20-nXn fullerenes; a new gate to the future of Nano technology
Autorzy:
Siadati, Seyyed Amir
Rezazadeh, Solmaz
Powiązania:
https://bibliotekanauki.pl/articles/35114894.pdf
Data publikacji:
2022
Wydawca:
Radomskie Towarzystwo Naukowe
Tematy:
[3+2] cycloaddition
nanotechnology
C20 fullerene
actuators
reaction mechanism
functionalization
[3+2] cykloaddycja
nanotechnologia
fuleren C20
aktuatory
mechanizm reakcji
funkcjonalizacja
Opis:
A quick glance to the adsorption, sensing, and energy storage abilities of C<sub>20</sub> fullerene and its derivatives indicate that this small carbon cluster may have extraordinary properties which would make it a key part of the future of Nano actuators and Nano machines. For example, in the case of the gravity of three atom 4π-components (TACs) to these carbon cages, it should be noted that; the rate constants (K)s of the reaction of C<sub>20</sub> fullerene with 1,3-butadiene (Diels-Alder (DA) process), and with 2-furan nitrile oxide ([3+2] cycloaddition (32CA process)) are 2.51(10<sup>11</sup>) M<sup>-1</sup> s<sup>-1</sup>, and 1.4(10<sup>7</sup>) M<sup>-1</sup>s<sup>-1</sup>, respectively. However, the rate constant of the 32CAreaction between norbornadiene and 3,4-dihydro isoquinoline-N-oxide is about 2.56(10<sup-5</sup>) M<sup>-1</sup> s<sup>-1</sup> (both by DFT and by experimental results). This simple comparison could show the extraordinary gravity of some TACs and dienes to C<sub>20</sub> fullerenes.
Źródło:
Scientiae Radices; 2022, 1, 1; 46-68
2956-4808
Pojawia się w:
Scientiae Radices
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Carbon nanostructure growth: new application of magnetron discharge
Autorzy:
Breus, A.
Abashin, S.
Serdiuk, O.
Powiązania:
https://bibliotekanauki.pl/articles/2055755.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
nanotechnology
plasma synthesis
carbon nanostructures
magnetron discharge
arc spots
nanotechnologia
synteza plazmowa
nanostruktury węglowe
rozpylanie magnetronowe
wyładowania
Opis:
Purpose: The application of a common magnetron discharge to the growth of carbon nanostructures is studied. The simplicity of the proposed technique can be beneficial for the development of new plasma reactors for large-scale production of carbon nanostructures. Design/methodology/approach: Graphite cathode was treated by carbon-containing powder accelerated by use of nozzle, and then aged in hydrogen. Superposition of glow and arc discharges was obtained, when putting the cathode under the negative biasing with respect to the walls of a vacuum chamber. The pulsed discharge was preserved through the whole time of treatment. This process was explained in terms of interaction of glow discharge plasma with a surface of the cathode made of non-melting material. Findings: The plasma treatment resulted in generation of the diverse nanostructures confirmed by SEM and TEM images. Spruce-like nanostructures and nanofibers are observed near the cathode edge where the plasma was less dense; a grass-like structure was grown in the area of “race-track”; net-like nanostructures are found among the nanofibers. These findings allow concluding about the possible implementation of the proposed method in industry. Research limitations/implications: The main limitation is conditioned by an explosive nature of nanostructure generation in arcs; thus, more elaborate design of the setup should be developed in order to collect the nanospecies in the following study. Practical implications: High-productivity plasma process of nanosynthesis was confirmed in this research. It can be used for possible manufacturing of field emitters, gas sensors, and supercapacitors. Originality/value: Synthesis of carbon nanostructures is conducted by use of a simple and well-known technique of magnetron sputtering deposition where a preliminary surface treatment is added to expand the production yield and diversity of the obtained nanostructures.
Źródło:
Journal of Achievements in Materials and Manufacturing Engineering; 2021, 109, 1; 17--25
1734-8412
Pojawia się w:
Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nanoantibodies: small molecules, big possibilities
Autorzy:
Pedreanez, A.
Mosquera-Sulbaran, J.
Munoz, N.
Tene, D.
Robalino, J.
Powiązania:
https://bibliotekanauki.pl/articles/2096419.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
camelids
nanoantibodies
nanotechnology
nanoreagents
SARS-CoV-2
therapy
Opis:
Camelids (camels, dromedaries, alpacas, llamas, and vicuZas) contain in their serum conventional heterodimeric antibodies as well as antibodies with no light chains (L) in their structure and composed of only heavy chains (H), called as HcAbs (heavy chain antibodies). Variable fragments derived from these antibodies, called as VHH or nanoantibodies (Nbs), have also been described. Since their discovery, Nbs have been widely used in the fields of research, diagnostics, and pharmacotherapy. Despite being approximately one-tenth the size of a conventional antibody, they retain similar specificity and affinity to conventional antibodies and are much easier to clone and manipulate. Their unique properties such as small size, high stability, strong antigen binding affinity, water solubility, and natural origin make them suitable for the development of biopharmaceuticals and nanoreagents. The present review aims to describe the main structural and biochemical characteristics of these antibodies and to provide an update on their applications in research, biotechnology, and medicine. For this purpose, an exhaustive search of the biomedical literature was performed in the following databases: Medline (PubMed), Google Scholar, and ScienceDirect. Meta-analyses, observational studies, review articles, and clinical guidelines were reviewed. Only original articles were considered to assess the quality of the evidence.
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2021, 102, 3; 321-336
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nanocellulose from agricultural waste as an emerging nanotechnology material for nanotechnology applications – an overview
Nanoceluloza z odpadów rolniczych jako potencjalny materiał nanotechnologiczny
Autorzy:
Abdullah, Nur Athirah
Rani, Mohd Saiful Asmal
Mohammad, Masita
Sainorudin, Muhammad Hanif
Asim, Nilofar
Yaakob, Zahira
Razali, Halim
Emdadi, Zeynab
Powiązania:
https://bibliotekanauki.pl/articles/1789942.pdf
Data publikacji:
2021
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
Tematy:
nanocellulose
agricultural waste
biopolymer
nanotechnology
green products
nanoceluloza
odpady rolnicze
biopolimer
nanotechnologia
zielone produkty
Opis:
It has been shown that in the last decades nanotechnology plays a key role not only in science but more and more of ten in industry as well. Recent research has shown that agricultural waste is a possible feedstock to produce nanocellulose which can be used for diff erent applications, such as a biosensor, semiconductor and reinforcing agent. The use of agro-waste as a precursor not only off ers advantages for raw material costs, but also for the climate, low processing costs, availability and convenience. It also helps to address environmental issues, such as illness, foul odor and concerns with indoor use. Diff erent processes, such as chemical treatment, mechanical treatment and chemo-mechanical treatment, have been used to extract nanocellulose from agro-waste. This article highlights the latest technologies used to acquire agro-waste nanocellulose, as well as existing advances in and applications of nanocellulose technologies.
W ostatnich dziesięcioleciach nanotechnologia odgrywa kluczową rolę nie tylko w nauce, ale coraz częściej także w przemyśle. Wyniki prowadzonych badań wskazują, że odpady rolnicze mogą stanowić potencjalny surowiec do produkcji nanocelulozy. Wiadomo, że nanoceluloza jest doskonałym materiałem do różnych zastosowań, m.in. jako biosensor, półprzewodnik i czynnik wzmacniający – włókna. Wykorzystanie agroodpadów jako surowca jest korzystne nie tylko ze względu na ich cenę, ale także ze względu na potencjalnie niewielki wpływ na klimat, niskie koszty i łatwość przetwarzania oraz dostępność. Niweluje również możliwe problemy wynikające z emisji nieprzyjemnych zapachów i ich negatywnego wpływu na zdrowie organizmów żywych. Do ekstrakcji nanocelulozy z agroodpadów stosuje się procesy obróbki chemicznej, obróbki mechanicznej i obróbki chemiczno-mechanicznej. Przedstawiono najnowsze technologie wykorzystywane do pozyskiwania nanocelulozy zagroodpadów, a także dotychczasowe postępy i zastosowania technologii zużyciem nanocelulozy.
Źródło:
Polimery; 2021, 66, 3; 157--168
0032-2725
Pojawia się w:
Polimery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance Comparison of Stacked Dual-Metal Gate Engineered Cylindrical Surrounding Double-Gate MOSFET
Autorzy:
Dargar, Abha
Srivastava, Viranjay M.
Powiązania:
https://bibliotekanauki.pl/articles/1844602.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
short-channel effects
metal oxide semiconductor
transistor
cylindrical surrounding double-gate
dual-material gate
microelectronics
nanotechnology
Opis:
In this research work, a Cylindrical Surrounding Double-Gate (CSDG) MOSFET design in a stacked-Dual Metal Gate (DMG) architecture has been proposed to incorporate the ability of gate metal variation in channel field formation. Further, the internal gate's threshold voltage (VTH1) could be reduced compared to the external gate (VTH2) by arranging the gate metal work-function in Double Gate devices. Therefore, a device design of CSDG MOSFET has been realized to instigate the effect of Dual Metal Gate (DMG) stack architecture in the CSDG device. The comparison of device simulation shown optimized electric field and surface potential profile. The gradual decrease of metal work function towards the drain also improves the Drain Induced Barrier Lowering (DIBL) and subthreshold characteristics. The physics-based analysis of gate stack CSDG MOSFET that operates in saturation involving the analogy of cylindrical dual metal gates has been considered to evaluate the performance improvements. The insights obtained from the results using the gate-stack dual metal structure of CSDG are quite promising, which can serve as a guide to further reduce the threshold voltage roll-off, suppress the Hot Carrier Effects (HCEs) and Short Channel Effects (SCEs).
Źródło:
International Journal of Electronics and Telecommunications; 2021, 67, 1; 29-34
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis and applications of calcium-aluminum layered double hydroxides – an overview
Synteza i zastosowanie warstwowych podwójnych wodorotlenków wapniowo-glinowych – przegląd literatury
Autorzy:
Md Ghazali, Ira Wahadah
Bohari, Farah Liyana
Dzulkifli, Nur Nadia
Abdullah, Asiah
Fatimah, Is
Sheikh Mohd Ghazali, Sheikh Ahmad Izaddin
Powiązania:
https://bibliotekanauki.pl/articles/2088244.pdf
Data publikacji:
2021
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
Tematy:
layered double hydroxides
process was explained
nanotechnology
warstwowe podwójne wodorotlenki
proces kapsułkowania
nanotechnologia
Opis:
The synthesis and application of layered calcium-aluminum double hydroxides (Ca-Al LDHs) for the encapsulation of organic anions is discussed. The mechanism of the encapsulation process was explained. These types of compounds have great potential and can be used in targeted therapies, including in drug dosing systems.
Omówiono syntezę i zastosowanie warstwowych podwójnych wodorotlenków wapniowoglinowych (Ca-Al LDHs) do kapsułkowania anionów organicznych. Wyjaśniono mechanizm procesu kapsułkowania. Tego typu związki mają bardzo duży potencjał i mogą znaleźć zastosowanie w terapiach celowych m.in. w systemach kontrolowanego dozowania leków.
Źródło:
Polimery; 2021, 66, 10; 518--526
0032-2725
Pojawia się w:
Polimery
Dostawca treści:
Biblioteka Nauki
Artykuł

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