Results 91 to 100 of about 22,823 (226)

Higher Overtone Vibrational Frequencies of Cyclobutane-D8 Using Lie Algebraic Framework

East European Journal of Physics
This research study employs a Lie algebraic framework to investigate the second and third overtone vibrational frequencies and their combination bands in cyclobutane-d8 (C4D8).
A. Ganapathi Rao, K. Lavanya, J. Vijayasekhar   +2 more
doaj   +1 more source

Phosphorylated HBO1 at UV irradiated sites is essential for nucleotide excision repair

Nature Communications, 2017
Repair of cyclobutane pyrimidine dimers requires access to DNA by the nucleotide excision repair machinery. Here the authors show that HBO1 facilitates accumulation of SNF2H and ACF1 to make chromatin more accessible after ultraviolet damage.
Hiroyuki Niida, Ryoichi Matsunuma, Ryo Horiguchi, Chiharu Uchida, Yuka Nakazawa, Akira Motegi, Koji Nishimoto, Satoshi Sakai, Tatsuya Ohhata, Kyoko Kitagawa, Shinichi Moriwaki, Hideo Nishitani, Ayako Ui, Tomoo Ogi, Masatoshi Kitagawa   +14 more
doaj   +1 more source

Guanine Deaminase Stimulates Ultraviolet-induced Keratinocyte Senescence in Seborrhoeic Keratosis via Guanine Metabolites

Acta Dermato-Venereologica, 2020
DNA damage and oxidative stress play a critical role in photoageing. Seborrhoeic keratosis (SK) affects sunlight-exposed sites in aged individuals. This study examined the mechanism of photoageing in SK.
Kyung Ah Cheong, Ai-Young Lee
doaj   +1 more source

Constitutive nitric oxide synthases deficiency impairs cyclobutane pyrimidine dimer repair following solar UV exposure in cells and mice

Photochemistry and Photobiology, EarlyView.
Proposed model for the dual role of cNOS in DNA damage and repair upon UV radiation. Abstract Solar ultraviolet (sUV) radiation is a major environmental factor that induces DNA damage, promoting skin aging and carcinogenesis. The formation of cyclobutane pyrimidine dimers (CPDs) is one of the most prevalent forms of UV‐induced DNA lesions, playing a ...
Veronica Bahamondes Lorca, Yuxi Zhou, Christina Athans, Hailey Payne, Madison Wright, Zeinab Feyyaz, Lingying Tong, Dawn L. Sammons, Shiyong Wu   +8 more
wiley   +1 more source

Investigation of 222‐nm ultraviolet C irradiation bactericidal effect on the surgical field in a rabbit model

Photochemistry and Photobiology, EarlyView.
In a rabbit surgical field model seeded with polymicrobial flora, a single dose of 222‐nm UV‐C (500 mJ/cm2) markedly reduced bacterial colonies, achieving a bactericidal effect comparable to 254‐nm UV‐C (200 mJ/cm2), while no UV‐C irradiation showed heavy growth. Wound healing did not differ among groups. Microbiota profiling detected SSI‐relevant taxa
Tomoaki Fukui, Yuya Yamamoto, Kyohei Takase, Keisuke Oe, Kenichi Sawauchi, Ryota Nishida, Takahiro Niikura, Rena Kaigome, Masahiro Sasaki, Toru Koi, Hiroyuki Ohashi, Ryosuke Kuroda   +11 more
wiley   +1 more source

Direct evidence of singlet molecular oxygen [O2 (1Δg)] production from UVA excited 6‐thioguanine

Photochemistry and Photobiology, EarlyView.
6‐Thioguanine (6‐TGua) is incorporated into DNA as a purine analogue, inhibiting cell replication. Patients treated with 6‐TGua are more prone to developing skin cancer due to the photoexcitation of 6‐TGua by UVA radiation (as illustrated in the Jablonski diagram). Upon exposure to UVA, the excited 6‐TGua generates 1O2.
André L. Lopes, Fernanda M. Prado, Helena C. Junqueira, Marisa H. G. Medeiros, Graziella E Ronsein, Jean Cadet, Paolo Di Mascio   +6 more
wiley   +1 more source

Synthesis of Cis-Diammine (1,1-cyclobutane dicarboxylate) Platinum(II) [PDF]

Iranian Journal of Chemistry & Chemical Engineering, 2017
Platinum-based anticancer drugs are chemotherapeutic agents to treat cancer. Carboplatin (cis diammine cyclobutane dicarboxylate platinum (II)) is a second generation drug that has less toxic than cisplatin, allowing for high dosages. In the first stage,
Ali Nemati kharat, Bahareh Tamaddoni Jahromi, Ehsan Mohammadifar, Jaleh Zareyi   +3 more
doaj  

Ion molecule reactions in vinyl fluoride by photoionization. Effects of vibrational excitation on major reaction pathways [PDF]

, 1976
Photoionization methods have been used to study the reactions of the molecular ion in vinyl fluoride to yield the ionic products C_3H_3F_2^+, C_3H_4F^+, and C_3H_5^+.
Beauchamp, J. L., Williamson, Ashley D.
core  

RAD51 and RAD51 paralog inhibition sensitizes nonreplicating quiescent keratinocytes to UV radiation

Photochemistry and Photobiology, EarlyView.
UV radiation and other compounds generate DNA adducts that block transcription and induce cell death if not removed by the nucleotide excision repair system. In this work, we used a small‐scale pharmacological screen to discover that inhibition of the recombinase RAD51 sensitized nonreplicating quiescent keratinocytes to both UVR and other agents that ...
Saman Khan, Angitha Nair, M. Alexandra Carpenter, Michael G. Kemp   +3 more
wiley   +1 more source

Ligand-controlled regiodivergent aminocarbonylation of cyclobutanols toward 1,1- and 1,2-substituted cyclobutanecarboxamides

Nature Communications
Four-membered carbocycles are among the most sought-after backbones which are commonly found in biologically active molecules. However, difficulties on their producing are existing due to its highly strained ring system.
Xing-Wei Gu, Yan-Hua Zhao, Xiao-Feng Wu
doaj   +1 more source