Results 41 to 50 of about 429 (149)

Leucistic Blackbird (Turdus merula) observations from Slovakia: differences in occurrence frequencies between sexes, urban vs. non-urban habitats and across seasons [PDF]

Tichodroma
Leucism or partial albinism is defined as insufficient production of pigment melanin indicated by normally pigmented eyes, but feather is white to pale brown and pale feather coloration may vary in extent, while some body parts e.g.
Martin Korňan, Ján Kočí, Peter Lešo, Anton Krištín   +3 more
doaj   +1 more source

Systematic Engineering of Proteases in Saccharopolyspora Spinosa Reveals Synergistic Enhancement of Spinosad Biosynthesis via Substrate Flux Optimization

Advanced Science, Volume 13, Issue 20, 9 April 2026.
ARTP mutagenesis yielded Saccharopolyspora spinosa mutant D184 with improved extracellular nitrogen utilization. An integrated workflow of protease genetic manipulation, multi‐omics, and rational synergy design pinpointed a pepP‐clpP‐htpX synergistic triangular combination.
Duo Jin, Wangqiong Chen, Danlu Yang, Qing Liu, Baolong Bai, Zirui Dai, Xirong Liu, Zirong Zhu, Jie Rang, Liqiu Xia   +9 more
wiley   +1 more source

Progressive greying in the groove-billed ani (Crotophaga sulcirostris) in Costa Rica

Huitzil, 2020
Plumage color aberrations are common in birds, but often they are difficult or even impossible to identify properly. The pigmentary abnormality with the greatest prevalence among birds is progressive greying, although it is often confused with leucism ...
José Manuel Mora, Marcos Narón Campos Loría   +1 more
doaj   +1 more source

A case of color aberration in a fire salamander (Salamandra salamandra) larva [PDF]

Herpetozoa, 2020
Color aberrations in salamanders are caused by defective chromatophores or by disrupted synthesis of the pigments, and have been previously reported in Europe.
Sabina Elena Vlad, Dan Cogălniceanu, Raluca Ioana Băncilă, Florina Stănescu   +3 more
doaj   +3 more sources

Comparative Proteomic Profiling of Clinical Klebsiella pneumoniae Strains and the Corresponding Outer Membrane Vesicles

Journal of Extracellular Biology, Volume 5, Issue 4, April 2026.
ABSTRACT Klebsiella pneumoniae (K. pneumoniae) has become a global threat due to the convergence of carbapenem resistance and hypervirulence. Outer membrane vesicles (OMVs) play important roles in bacterial pathogenicity, yet their functional coordination with strains remains unclear.
Zongping Li, Jingyuan Xi, Xinmiao Jia, Yangzhige He, Guibin Wang, Shiyu Chen, Xiaobing Chu, Qian Zhang, Ying Zhu, Wei Yu, Peiyao Jia, Xiaoyu Liu, Qiwen Yang   +12 more
wiley   +1 more source

First record of leucism in the genus \u3ci\u3ePeromyscus\u3c/i\u3e (Mammalia: Rodentia) [PDF]

, 2014
Leucism is a partial hypopigmentary congenital disorder previously recorded in several species of mammals. This abnormal coloration is unusual in the wild.
Cornejo-Latorre, Cristian, Álvarez-Castañeda, Sergio Ticul, Camargo, Issac, Rios, Evelyn   +3 more
core  

Pigmentation disorders in three specimens of spiny dogfish, Squalus acanthias Linnaeus, 1758, from the Gulf of Venice, northern Adriatic Sea

Journal of Fish Biology, Volume 108, Issue 4, Page 1402-1406, April 2026.
Abstract This study reports three cases of pigmentation disorders in Squalus acanthias from the Gulf of Venice. Two specimens exhibited spotless phenotypes, whereas one exhibited hypermelanism. Morphological assessments were conducted for two individuals, alongside genetic analysis of mitochondrial genes to determine phylogeographic relationships. Both
Jacopo Bernardi, Licia Finotto, Giusy Catalano, Valentina Crobe, Alessia Cariani, Alice Ferrari   +5 more
wiley   +1 more source

A Case Series of Hypermucoid Klebsiella pneumoniae Liver Abscess in Caucasian Americans Without Travel History: An Epidemiologic Shift?

Clinical Case Reports, Volume 14, Issue 3, March 2026.
ABSTRACT Hypervirulent Klebsiella pneumoniae (hvKp) is an emerging cause of community‐acquired pyogenic liver abscess (PLA), classically described in East and Southeast Asia. We report two cases of hvKp‐associated PLA in Caucasian women of American origin with no history of international travel, animal exposure, or Asian food consumption. Both patients
Krishna Sai Kiran Sakalabaktula, Sameer Kumar Majety, Sri Ratna Divya Nanduri, Divya Durga, David Kreps, Devi Prasad Botu, Gopichand Muppana   +6 more
wiley   +1 more source

A Robust Bioprocess for the Global Incorporation of Noncanonical Amino Acids in Auxotrophic Hosts Produces Labeled Proteins at the Gram Scale

ChemBioChem, Volume 27, Issue 1, January 2026.
A robust bioprocess enables global incorporation of noncanonical amino acids in both shake flask and bioreactor cultures, producing gram‐per‐liter titers of efficiently labeled proteins. A versatile Escherichia coli BL21(DE3) auxotroph platform supports broad compatibility with various noncanonical amino acids and target proteins, facilitating flexible
Patrik Fladischer, Niklaus Anderhuber, Octavian Murgu, Altijana Hromić‐Jahjefendić, Tea Pavkov‐Keller, Karl Gruber, Juergen Mairhofer, Gerald Striedner, Birgit Wiltschi   +8 more
wiley   +1 more source

The First insights into Avian Deformities in Algeria

Avocetta
High rates of gross deformities in wildlife populations often serve as indicators of underlying environmental health problems. This study represents the first, most comprehensive effort possible to document avian deformities in Algeria, including ...
Mohamed Belkacem, Belkacem Aimene Boulaouad, Mohamed Mairif, Tayeb Djetti   +3 more
doaj   +1 more source