We demonstrate a class of nondiffracting beams, called frozen waves, with a central spot that can be made to maintain a predefined intensity profile while propagating in an absorbing fluid. Frozen waves are composed of Bessel beams with different transverse and longitudinal wavenumbers, and are generated using a programmable spatial light modulator. The attenuation-resistant frozen waves demonstrated here address the problem of propagation losses in absorbing media. This development can be beneficial for many applications in particle micro-manipulation, data communications, remote sensing, and imaging.
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http://dx.doi.org/10.1364/OL.41.003702 | DOI Listing |
Breast Cancer Res
January 2025
Department of Cancer Biology, Wake Forest University School of Medicine, Winston-Salem, NC, 27157, USA.
Obesity is a modifiable risk factor for breast cancer. Yet, how obesity contributes to cancer initiation is not fully understood. The goal of this study was to determine if the body mass index (BMI) and metabolic hallmarks of obesity are related to DNA damage in normal breast tissue.
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January 2025
Laboratoire d'Acoustique de l'Université du Mans (LAUM), UMR 6613, Institut d'Acoustique - Graduate School (IA-GS), CNRS, Le Mans Université, Le Mans, France.
We report on conditions of invariance of the transmitted pattern in the propagation through a periodic waveguide, the incident wave having no effect on the intensity pattern of the transmitted field. This phenomenon is reminiscent of that observed when illuminating a disordered medium in the regime of Anderson localization, as a consequence of the contribution of a single transmission eigenchannel to the transmitted wave. It is shown that the freezing of the transmitted wave is not intrinsically related to the disorder and that, whatever the frequency, it can also be observed in a regular, periodic system, provided that at most one Bloch mode is propagating.
View Article and Find Full Text PDFEur J Obstet Gynecol Reprod Biol
December 2024
Reproductive Medicine Center, Affiliated Maternity and Child Health Care Hospital of Nantong University, Jiangsu, China. Electronic address:
Objective: To retrospectively investigate the efficacy of phloroglucinol administration after freeze-thawed embryo transfer in patients experiencing recurrent implantation failure (RIF).
Materials And Methods: A total of 139 infertile couples who experienced RIF undergoing in vitro fertilisation and embryo transfer were divided into the control (n = 66) and the phloroglucinol (n = 73) groups. Women in the phloroglucinol group received 80 mg phloroglucinol 30 min after transfer, then once daily up to day 3 after the embryo transfer.
Food Res Int
December 2024
College of Food Science and Engineering, Tarim University, Alar, Xinjiang 843300, China. Electronic address:
The variation in thawing time, deterioration behavior, secondary structure, surface hydrophobicity, and average particle size of frozen egg whites (EW) thawed with or without ultrasound were characterized to evaluate the effect of ultrasound on the gel properties and volatiles of egg white thermogel (EWG). The texture, water holding capacity, etc., gel properties and microstructure were well maintained in frozen EW thawed by ultrasound (UEW) resulted from the mitigation of deterioration behavior due to shorter melting time (reduced 91.
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October 2024
Animal Reproduction Division, ICAR-Indian Veterinary Research Institute (ICAR-IVRI), Bareilly, India.
The study aimed to evaluate the effect of antral follicle count (AFC) on follicular and luteal development during the estrous cycle and superovulatory period, as well as on superovulatory response and embryo quality within the MOET program. A total of 48 estrus-induced (500 μg PGF2α, Single dose, IM) Sahiwal cows () with a BCS between 3.5 and 4.
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