Results 1 to 10 of about 1,755,129 (221)

Imaging of Self‐Assembled Structures: Interpretation of TEM and Cryo‐TEM Images [PDF]

Angewandte Chemie - International Edition, 2010
AbstractThe investigation of solution‐borne nanostructures by transmission electron microscopy (TEM) is a frequently used analytical method in materials chemistry. In many cases, the preparation of the TEM sample involves drying and staining steps, and the collection of images leads to the interaction of the specimen with the electron beam.
Gijsbertus de With, Nico Sommerdijk, Heiner Friedrich   +2 more
exaly   +3 more sources

Transmission electron microscopy characterisation of Spirulina bioplastics. [PDF]

J Microsc
Abstract Plastic pollution is impacting global ecosystem health. Bioplastics made from unprocessed biomass, including whole or fragmented tissues, are one potential solution. They are biodegradable and exhibit competitive mechanical performance. Seaweed and microalgae have gained popularity over the last decade as bioplastic feedstocks due to their ...
Azidhak S, Taatjes DJ, Campbell IR, Roumeli E, Schadler LS.   +4 more
europepmc   +2 more sources

“QUEM TEM FOME, TEM PRESSA”

Revista de Políticas Públicas, 2023
A ascensão da fome no Brasil é um fato relacionado a uma série de fatores, sobretudo pelo processo de desmonte de políticas públicas direcionadas à promoção da Segurança Alimentar e Nutricional. O artigo objetiva analisar o desenvolvimento das políticas públicas de combate à fome no Brasil na perspectiva da atual conjuntura. Para isto, traça o contexto
Maria Alane Pereira de Brito, Maria Laís dos Santos Leite, Suely Salgueiro Chacon   +2 more
openaire   +1 more source

Geological Characteristics, Genetic Types and Utilization Value of Yonghong Fluorite Deposit in Mabian Area, Southwest Sichuan and Its Enlightenment to Regional Prospecting

Kuangchan zonghe liyong, 2023
Sichuan is an area where there are no fluorite deposits and no fluorite metallogenic belts. The discovery of medium-sized fluorite deposit in Mabian area is of great significance.
Jun Wen, Wei Zhao, Fuyong Li, Helin Zhu, Hangfei Zhang, Jinyuan Zhang   +5 more
doaj   +1 more source

Sequences of the Genes for the TEM-20, TEM-21, TEM-22, and TEM-29 Extended-Spectrum β-Lactamases [PDF]

Antimicrobial Agents and Chemotherapy, 1999
ABSTRACT The sequences of the bla TEM genes encoding TEM-20, TEM-21, TEM-22, and TEM-29 extended-spectrum β-lactamases were determined. Analysis of the deduced amino acid sequences indicated that TEM-20 and TEM-29 were derived from TEM-1 and that TEM-21 and TEM-22 were derived from TEM-2.
G, Arlet, S, Goussard, P, Courvalin, A, Philippon   +3 more
openaire   +2 more sources

Temperature effect on the tensile properties of unplasticized polyvinyl chloride

SPE Polymers, 2022
The present paper investigates the effect of temperature of unplasticized polyvinyl chloride (UPVC) under tension. UPVC specimens were tensile tested across a range of temperatures (from −20°C to 60°C).
Felipe C. Amorim, Joao F. B. Souza, Heraldo S. daCosta Mattos, Joao M. L. Reis   +3 more
doaj   +1 more source

Quem tem fome, tem pressa

Cadernos de Estágio, 2022
A presente carta aberta é um desabafo de uma graduanda de Letras, estagiária, observadora e descontente. Direcionada ao presidente do país, o texto relata a experiência do convívio (remoto) com alunos de uma escola estadual em meio à pandemia do Covid-19, realidade permeada por incertezas e agravantes, estes explorados a fundo de forma crítica ao serem
openaire   +1 more source

Comparative Studies of Biosynthesized Zinc Oxide Nanoparticles [PDF]

Nanochemistry Research, 2023
Zinc oxide nanoparticles are one of the known safe compounds, and their low toxicity makes them suitable for waste water remediation. An environment-friendly approach of synthesizing nanoparticles is the use of plant extracts which are rich sources of ...
Emmanuel Oyetola
doaj   +1 more source

Comparative Studies of Synthesized Copper Oxide Nanoparticles using Aqueous Extract of Leaves [PDF]

Nanochemistry Research, 2023
The use of plant extracts as reducing agents in the synthesis of metal and metal oxide nanoparticles has come into prominence due to their procedural simplicity, precursor’s eco-friendliness, and cost effectiveness.
Emmanuel Oyetola, Friday Nwosu, Gboyega Oluwaseun Oyeleke, Ismaila Olawale, Bosede Mofoluwake Adegoke, Usman Afolabi   +5 more
doaj   +1 more source

Water Pollution and its Treatment using nanocomposites of graphene oxide (GO 50%) / Zn2+ for different dyes and heavy metals using sol-gel synthesized

Journal of Scientific Research in Science, 2023
In this study, Spinel nano ferrite (MFe2O4) ferrite powders were prepared by auto-combustion reaction. Nanoparticles have been synthesized by sol-gel method using citric acid as chemical catalyst while graphene Oxide prepared using Hammer technique and ...
R. Atya, N. Okasha, A.Azab, A.M. Baker
doaj   +1 more source