Results 21 to 30 of about 2,023 (178)

Comparative Transcriptome Analysis During the Seven Developmental Stages of Channel Catfish (Ictalurus punctatus) and Tra Catfish (Pangasianodon hypophthalmus) Provides Novel Insights for Terrestrial Adaptation

Frontiers in Genetics, 2021
Tra catfish (Pangasianodon hypophthalmus), also known as striped catfish, is a facultative air-breather that uses its swim bladder as an air-breathing organ (ABO). A related species in the same order (Siluriformes), channel catfish (Ictalurus punctatus),
Xiaoli Ma, Xiaoli Ma, Mei Shang, Mei Shang, Baofeng Su, Baofeng Su, Anne Wiley, Max Bangs, Max Bangs, Max Bangs, Veronica Alston, Veronica Alston, Rhoda Mae Simora, Rhoda Mae Simora, Rhoda Mae Simora, Mai Thi Nguyen, Nathan J. C. Backenstose, Nathan J. C. Backenstose, Nathan J. C. Backenstose, Anthony G. Moss, Anthony G. Moss, Thuy-Yen Duong, Xu Wang, Xu Wang, Xu Wang, Rex A. Dunham, Rex A. Dunham   +26 more
doaj   +1 more source

Apoptosis and expression of argyrophilic nucleolus organizer regions in epithelial neoplasms of the larynx

Brazilian Journal of Otorhinolaryngology, 2015
INTRODUCTION: Occurrence of apoptosis and expression of proliferative markers are powerful tools to establish a prognosis in the follow-up of cancer.OBJECTIVE: To evaluate the growth fraction in papillomas and laryngeal squamous cell carcinomas with ...
Christiana Vargas Ribeiro, Anilton Cesar Vasconcelos, José de Souza Andrade Filho   +2 more
doaj   +1 more source

Methods and tools for handling, transportation, weighing, and pelletization applied to the initial analysis of volatile components in the Hayabusa2 samples

Earth, Planets and Space, 2022
The Hayabusa2 spacecraft succeeded in sampling and returning materials from the C-type, near-Earth asteroid (162173) Ryugu. As part of the Hayabusa2 Initial Analyses, chemical and isotopic compositions of volatile species were measured.
Ryuji Okazaki, Shinji Yamanouchi, Kazuhiko Shimada, Atsushi Baba, Fumio Kitajima, Toru Yada   +5 more
doaj   +1 more source

Dynamic analysis of double-helical gear system considering effect of oil film among meshing teeth

Advances in Mechanical Engineering, 2020
The oil film among meshing teeth is just like a spring-damping element, and it can dominate the friction and meshing characteristics of the gear pair and influence its dynamic performances further.
Minghu Yin, Yahui Cui, Xiangjun Meng, Jinzhong Zuo, Yuhao Qi   +4 more
doaj   +1 more source

Scalable platform for nanocrystal-based quantum electronics [PDF]

arXiv, 2021
Unlocking the full potential of nanocrystals in electronic devices requires scalable and deterministic manufacturing techniques. A platform offering promising alternative paths to scalable production is microtomy, the technique of cutting thin lamellae with large areas containing embedded nanostructures.
arxiv  

Taxonomic study on Lindernia All. (Linderniaceae) from some parts of South Eastern Nigeria

Notulae Scientia Biologicae, 2020
The morpho-anatomical characteristics of Lindernia diffusa var. diffusa-in E. & P., L. oliveriana (Benth.) Wettst. and L. crustacea (L.) F. Muell.) were investigated with a view of providing additional line of evidence in the delimitation of the species ...
Chimezie EKEKE, Chinedum A. OGAZIE, Cornelius O. NICHODEMUS   +2 more
doaj   +1 more source

Small and hard seeds: a practical and inexpensive method to improve embedding techniques for light microscopy

Acta Botânica Brasílica, 2014
The traditional techniques employed for embedding plant samples are not suitable for the proper processing of small seeds with hard seed coats. Usually, these seeds are broken off from blocks during microtomy, which limits the technical success of this ...
Rafaella Cardoso Ribeiro, Denise Maria Trombert Oliveira   +1 more
doaj   +1 more source

Methylmercury intoxication and histochemical demonstration of NADPH-diaphorase activity in the striate cortex of adult cats

Brazilian Journal of Medical and Biological Research, 1998
The effects of methylmercury (MeHg) on histochemical demonstration of the NADPH-diaphorase (NADPH-d) activity in the striate cortex were studied in 4 adult cats. Two animals were used as control.
R.B. Oliveira, W. Gomes-Leal, J.L.M. do-Nascimento, C.W. Picanço-Diniz   +3 more
doaj   +1 more source

Construção de um micrótomo de congelamento a partir da adaptação de um micrótomo de parafina

Brazilian Archives of Biology and Technology, 1998
A microtome for frozen sections was developed using the facilities and equipment available in our country. The requirements for making it were: 1) fast frozen of the tissue, 2) easy histological procedure, 3) no necessity of long period for preparation ...
Cesar de Mello, L. Silva, D. A. M. Zaia, Cassia Thais B. V. Zaia   +3 more
doaj   +1 more source

Anatomical and Phytochemical Studies on Benincasa hispida (Thunb.) Cogn. (Cucurbitaceae)

Notulae Scientia Biologicae, 2019
The morphological and anatomical studies of Benincasa hispida (Thunb.) Cogn. from Nigeria was carried out with the view to reporting morphological and anatomical characteristics for the first time.
Chimezie EKEKE, Chinedum A. OGAZIE, Ikechukwu O. AGBAGWA   +2 more
doaj   +1 more source