Results 41 to 50 of about 11,831 (256)

Calcium Isotopes and the Problem of Potassium [PDF]

Nature, 1934
BY the systematic use of the purest materials, I have succeeded in reducing the effect of potassium in the mass-spectrum of calcium to a negligible quantity. Under these conditions, the line 41 disappears completely and it is quite safe to conclude that the isotope Ca 41 does not exist, at least to 1 part in 1000, in the element.
openaire   +1 more source

Atom–Cluster Synergy in Scalable Fe–Ru Dual‐Site Architectures Accelerates Alkaline Hydrogen Evolution

Advanced Materials, EarlyView.
A mechanochemically synthesized dual‐site electrocatalyst (RuNC@Fe1NC) accelerates alkaline hydrogen evolution via atomic‐level spatial decoupling. Oxophilic Fe single atoms effectively dissociate water, while adjacent Ru nanoclusters rapidly recombine hydrogen.
Jae‐Hoon Baek, Seong Hyeon Kweon, Sun Gwan Cha, Se Jung Lee, Jinwoo Baek, Dong Hyeok Kwon, Hojeong Lee, Youngkook Kwon, Sang Kyu Kwak, Jong‐Beom Baek   +9 more
wiley   +1 more source

Using Stable Isotopes of Carbon and Nitrogen to Mark Wild Populations of Anopheles and Aedes Mosquitoes in South-Eastern Tanzania.

PLoS ONE, 2016
BackgroundMarking wild mosquitoes is important for understanding their ecology, behaviours and role in disease transmission. Traditional insect marking techniques include using fluorescent dyes, protein labels, radioactive labels and tags, but such ...
Mercy A Opiyo, Gabriel L Hamer, Dickson W Lwetoijera, Lisa D Auckland, Silas Majambere, Fredros O Okumu   +5 more
doaj   +1 more source

UDP‐Glucose‐6‐Dehydrogenase Mediated O‐GlcNAcylation of Tight Junction Protein 1 Suppresses Metastasis in Renal Cell Carcinoma

Advanced Science, EarlyView.
Our research unveiled a regulatory paradigm wherein TRIM25 orchestrates the ubiquitin‐mediated degradation of UGDH. UGDH modulates the protein stability of TJP1 by regulating O‐GlcNAcylation levels, effectively impeding the metastasis of ccRCC. Our insights elevate UGDH to a pivotal biomarker and tumor suppressor, marking the first demonstration that ...
Xiaolin Chen, Yuhang Bao, Tao Liu, Jianhui Qiu, Yuanyuan Ma, Zedan Zhang, Chuandong Wang, Ruiyi Deng, Zheng Song, Tianyi He, Haode Liu, Jingcheng Zhou, Yizhou Wang, Kan Gong   +13 more
wiley   +1 more source

Shape Coexistence in Odd-Z Isotopes from Fluorine to Potassium

Particles
The shape of a nucleus is one of its fundamental properties. We conduct a systematic investigation of shape coexistence in odd-Z nuclei from fluorine to potassium using the deformed relativistic Hartree–Bogoliubov theory in continuum. First, we present a
Myeong-Hwan Mun, Panagiota Papakonstantinou, Youngman Kim   +2 more
doaj   +1 more source

Radiological assessment of radionuclide contents in soils in Lower Silesian Voivodeship in the years 1988-2014

E3S Web of Conferences, 2018
. In 1986, the Chernobyl disaster provoked the uncontrolled release of significant amounts of radioactive substances, which caused surface contamination in Poland through radioactive isotopes.
Łukaszek-Chmielewska Aneta, Stawarz Olga, Isajenko Krzysztof, Piotrowska Barbara, Girard Martin   +4 more
doaj   +1 more source

Concentrations and Radiation Hazard Indices of Naturally Radioactive Materials for Flour Samples in Baghdad Markets

مجلة بغداد للعلوم, 2021
In the present work, Uranium (238U), Thorium (232Th) and Potassium (40K) specific activity concentration in (Bq/kg) was measured in five different types for wheat flours that are available in the Iraqi markets.
Farah Faris kaddoori, Ban Sabah Hameed , Wijdan Thamer Fzaa   +2 more
doaj   +1 more source

Asymmetric Single‐Atom Catalysts Govern Diffusible and Non‐Diffusible Non‐Radical Pathways for Selective Degradation of Antibiotic Resistance Genes

Advanced Science, EarlyView.
Asymmetric single‐atom metal‐nitrogen‐carbon catalysts modulate the non‐radical pathway during peroxymonosulfate (PMS) activation. A fundamental contrast was revealed between diffusible singlet oxygen (1O2) and non‐diffusible electron‐transfer pathways (ETP) in antibiotic resistance gene (ARG) degradation.
Chen Gao, Jun Sun, Liang Zhang, Litao Lin, Zongfeng Wan, Bingcai Pan, Sheng Tang   +6 more
wiley   +1 more source

Fluid-driven element mobility resets plagioclase rubidium strontium and barium clocks while potassium feldspar resists

Communications Earth & Environment
Rubidium, cesium, strontium, barium and their isotopes are employed as tracers of magmatic differentiation and fluid-mediated metasomatism, but their mobility during mineral-scale alteration remains uncertain.
Hao-Xiang Zhang, Shao-Yong Jiang, Si-Qi Liu, Hui-Min Su, Wen-Tian Li   +4 more
doaj   +1 more source

Fractionation of the Cardiac Output of Rats with Isotopic Potassium [PDF]

Circulation Research, 1956
A single injection of K 42 given intravenously is initially distributed among the organs in proportion to the blood flow through them. By determining the organ content of K 42 after such an injection the cardiac output may be fractionated.
openaire   +2 more sources