Results 91 to 100 of about 2,965,710 (272)

Killing vector fields on semiriemannian manifolds

Killing vector fields on semiriemannian manifolds, 1989
Itiswellknown thata Killingvectorfieldon a riemannian compact manifold is holonomic (Kostant (4)). In other words, the Ax operator(Ax=Lx―Vx=― VX) liesin the holomony algebra of the manifold. The covariant derivative of Ax gives us a curvature transfor- mation.
openaire   +3 more sources

Intermittent Fasting Reduces Taurine Availability and Promotes Antitumor Immunity Through PERK Attenuation‐Associated Paraptosis‐Like Cell Death in Colorectal Cancer

Advanced Science, EarlyView.
This study identifies reduced taurine availability as a mediator of intermittent fasting in colorectal cancer and shows that taurine interacts with GRP78 to maintain PERK abundance post‐transcriptionally. It further shows that taurine depletion destabilizes PERK, induces immunogenic paraptosis, remodels the tumor microenvironment toward a CD8+ T cell ...
Baohui Song, Sikei Kam, Jingyi Liu, Rui Lv, Xucheng Huo, Zhanghan Chen, Yuelun Dong, Shilun Cai, Bing Li, Ruobing Ren, Yunshi Zhong, Mingyan Cai   +11 more
wiley   +1 more source

KILLING VECTOR FIELDS OF CONSTANT LENGTH ON RIEMANNIAN NORMAL HOMOGENEOUS SPACES [PDF]

, 2016
Killing vector fields of constant length correspond to isometries of constant displacement. Those in turn have been used to study homogeneity of Riemannian and Finsler quotient manifolds. Almost all of that work has been done for group manifolds or, more
XU, MING, WOLF, JOSEPH A
core   +1 more source

Mitochondrial Localization of Cx26 Promotes Colorectal Cancer Malignancy and Exposes a Fatal Vulnerability to Drug Targeting

Advanced Science, EarlyView.
Mitochondrial localization of Cx26 emerges as a double‐edged sword in colorectal cancer. PIMT‐mediated methylation of Cx26 promotes its mitochondrial localization and stability. Mitochondrial Cx26 then facilitates ER‐mitochondria communication and Ca2+ signaling, thereby promoting metastatic progression. Bortezomib exploits this malignant adaptation by
Jie Wang, Lu Chen, Jia Qin, Xiaoning Wang, Sunlan Ye, Ning An, Mei Bai, Yan Shen, Xuefeng Wu, Qiang Xu   +9 more
wiley   +1 more source

Oral Actinomyces Species Exposure is Associated with Anxiety‐Like Behavior, Mitochondrial Remodeling, and Altered GABAergic Pathways

Advanced Science, EarlyView.
Oral exposure to cannabis‐associated Actinomyces species, particularly A. meyeri, is associated with anxiety‐like behavior in mice in the absence of detectable bacterial translocation or overt systemic inflammation. These findings support a potential oral‐brain metabolic axis involving candidate metabolites such as arginine and argininosuccinate ...
Tabinda Salman, Zhenwu Luo, Douglas Johnson, Arshad A. Noorani, Zhuang Wan, Bogdan Bordieanu, Zhi‐wei Ye, Rachel D. Penrod, Hongxu Xian, Sylvia Fitting, Peter W. Kalivas, Wei Jiang   +11 more
wiley   +1 more source

A geometric heat flow for vector fields [PDF]

, 2015
peer reviewedWe introduce and study a geometric heat flow to find Killing vector fields on closed Riemannian manifolds with positive sectional curvature.
LI, Yi, Liu, KeFeng
core   +1 more source

Ultrasound‐Activated Ce(IV)‐Integrated Biomimetic Nanoplatform for Oxygenation‐Reinforced Gas‐Sonodynamic Ferroptosis and cGAS–STING‐Driven Antitumor Immunity

Advanced Science, EarlyView.
A Ce(IV)‐integrated biomimetic nanoplatform coordinates tumor oxygenation, ultrasound‐triggered carbon monoxide release, sonodynamic therapy, ferroptosis amplification, and cyclic GMP–AMP synthase (cGAS)–stimulator of interferon genes (STING) immune activation.
Mengli Ma, Yingying Wu, Yunjie Wang, Yang Li, Yijia Zhang, Zhibo Zhang, Jinzhi Peng, Xiangyu Wu, Yi Luo, Weijing Zhang, Xin Ye, Weisong Lai, Shengyu Wang, Dan Du, Wengang Li, Nan Zheng, Fanghong Luo, Ting Wu   +17 more
wiley   +1 more source

Meningeal Lymphatic LTBR Deficiency Links Spinal Cord Injury to Secondary Brain Pathology

Advanced Science, EarlyView.
Spinal cord injury (SCI) induces remote brain alterations beyond the injured spinal cord. This study links dysfunction of meningeal lymphatic vessels (mLVs) to neuroinflammation and neuronal injury after SCI. LTBR‐mediated lymphatic restoration improves meningeal lymphatic integrity and neurological outcomes, highlighting LTBR as a potential regulator ...
Yi Chen, Yu Tang, Chengpeng Hu, Xiaoyan Duan, LingXia Min, Boya Cong, Chao Ma, Mingliang Tan, Ya Luo, Pengfei Wei, Minpeng Xu, Zhou Feng, Jingming Hou   +12 more
wiley   +1 more source

The Torsion of Spinor Connections and Related Structures

Symmetry, Integrability and Geometry: Methods and Applications, 2006
In this text we introduce the torsion of spinor connections. In terms of the torsion we give conditions on a spinor connection to produce Killing vector fields.
Frank Klinker
doaj  

Phantom space–times in fake supergravity

Physics Letters B, 2015
We discuss phantom metrics admitting Killing spinors in fake N=2, D=4 supergravity coupled to vector multiplets. The Abelian U(1) gauge fields in the fake theory have kinetic terms with the wrong sign.
Maryam Bu Taam, Wafic A. Sabra
doaj   +1 more source