Results 21 to 30 of about 23,202,561 (250)

Avaliação da disponibilidade de fósforo no solo para a cultura do milho Assessment of soil phosphorus availability to corn

open access: yesPesquisa Agropecuária Brasileira, 1999
Conduziu-se um experimento, em 1994, em casa de vegetação com seis solos do Estado do Rio Grande do Sul, com o objetivo de avaliar a disponibilidade de fósforo no solo extraído pelos métodos duplo ácido (Mehlich-1), resinas em esferas (RE), em cápsulas ...
Gerson Roberto Miola   +4 more
doaj   +1 more source

Optical Colorimetric Sensing Label for Monitoring Food Freshness

open access: yesEngineering Proceedings, 2023
The development of optical sensors to monitor food freshness during storage and transportation helps to increase food security and customer satisfaction by preventing the misinterpretation of food date labeling.
Nedal Abu-Thabit
doaj   +1 more source

A hybrid active filter for damping of harmonic resonance in industrial power systems [PDF]

open access: yes, 1998
This paper proposes a hybrid active filter for damping of harmonic resonance in industrial power systems. The hybrid filter consists of a small-rated active filter and a 5th tuned passive filter.
T. Yamasaki   +5 more
core   +1 more source

Medical image enhancement using threshold decomposition driven adaptive morphological filter [PDF]

open access: yes, 2008
One of the most common degradations in medical images is their poor contrast quality. This suggests the use of contrast enhancement methods as an attempt to modify the intensity distribution of the image.
Mahmoud, Tarek A.   +4 more
core   +4 more sources

New Carrier Made from Glass Nanofibres for the Colorimetric Biosensor of Cholinesterase Inhibitors

open access: yesBiosensors, 2018
Cholinesterase inhibitors are widely used as pesticides in agriculture, but also form a group of organophosphates known as nerve chemical warfare agents.
Lukáš Matějovský   +1 more
doaj   +1 more source

Preparation of Wet Strength Paper from Filter Paper with NaOH-Thiourea-Urea Aqueous Solution

open access: yesBioResources, 2014
In this work, wet strength paper was prepared from quantitative filter paper pretreated with NaOH-thiourea-urea aqueous solution. The effects of alkali concentration, soaking time, freezing time, and washing time were evaluated through single factor ...
Rui Zhai, Yue Yuan, Xiaofan Zhou
doaj   +1 more source

Absolutely free extrinsic evolution of passive low-pass filter [PDF]

open access: yes, 2006
Evolutionary electronics is a brunch of evolvable hardware, where the evolutionary algorithm is applied towards electronic circuits. The success of evolutionary search most of all depends on variable length representation methodology. The low-pass filter
Kalganova, T   +3 more
core   +1 more source

A simpler diagnostic method using blood collection on filter paper to determine anti-natural octyl disaccharide-leprosy infectious disease research institute diagnostic in household contacts of leprosy patients

open access: yesDermatology Reports, 2019
The high prevalence among children shows continued transmission from adult and lack of disease control by the health system. Detection of anti-NDO-LID-1 has been known to be more effective to predict the development of leprosy in household contacts than ...
Meva Nareza Trianita   +9 more
doaj   +1 more source

An intelligent SPAM filter - GetEmail5 [PDF]

open access: yes, 2006
As the increasing reliance on electronic mail (email) continues, unsolicited bulk email (SPAM) also continues to grow because it is a very cheap way for advertising. These unwanted emails are now causing a serious problem in clogging the Internet traffic
P. Cole   +5 more
core   +1 more source

A novel solid state reaction route to the preparation of LiCoO2 using micro porous filter paper as scaffolds

open access: yesMaterials Research Express, 2020
A novel solid state reaction method has been followed to prepare LiCoO _2 (LCO) using micro porous filter paper as scaffolds. FT-IR spectroscopy confirms the vibration spectrum for the identification of CoO _6 as well as LCO.
Parbhej Ahamed, Mohammad Abu Yousuf
doaj   +1 more source

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