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Breast tumor‐initiating cells (BTICs) of triple‐negative breast cancer (TNBC) tissues actively repair DNA and are resistant to treatments including chemotherapy, radiotherapy, and targeted therapy. Herein, it is found that a previously reported secreted protein, sclerostin domain containing 1 (SOSTDC1), is abundantly expressed in BTICs of TNBC cells and positively correlated with a poor patient prognosis. SOSTDC1 knockdown impairs homologous recombination (HR) repair, BTIC maintenance, and sensitized bulk cells and BTICs to Olaparib. Mechanistically, following Olaparib treatment, SOSTDC1 translocates to the nucleus in an importin‐α dependent manner. Nuclear SOSTDC1 interacts with the N‐terminus of the nucleoprotein, chromatin helicase DNA‐binding factor (CHD1), to promote HR repair and BTIC maintenance. Furthermore, nuclear SOSTDC1 bound to β‐transducin repeat‐containing protein (β‐TrCP) binding motifs of CHD1 is found, thereby blocking the β‐TrCP‐CHD1 interaction and inhibiting β‐TrCP‐mediated CHD1 ubiquitination and degradation. Collectively, these findings identify a novel nuclear SOSTDC1 pathway in regulating HR repair and BTIC maintenance, providing insight into the TNBC therapeutic strategies. [ABSTRACT FROM AUTHOR]

Mn/TiO2 and Fe–Mn/TiO2 catalysts were prepared using the impregnation method to explore the effect of iron doping at low temperature on the catalytic oxidation of high concentration NO by manganese-based catalysts and the catalytic reaction mechanism. This study reveals that the Fe–Mn/TiO2 catalyst performed exceptionally well in catalyzing high concentration NO smelting flue gas within a temperature range of 30–170 °C. At 150 °C, the denitrification efficiency of Fe–Mn/TiO2 (0.3) catalyst was 97.7%. Characterization analysis revealed that the incorporation of iron increased the ratio of high valence manganese and surface chemisorbed oxygen, which promoted the dispersion of surface-active substances, ultimately leading to an increase in the specific surface area of the catalyst. These factors facilitated the adsorption and activation of NH3 as well as the oxidation of NO to NO2, thus increasing the low-temperature redox capacity of the catalyst. Meanwhile, the ammonia selective catalytic reduction (NH3-SCR) denitrification mechanism over Fe–Mn/TiO2 catalysts was consistent with the Eley–Rideal (E–R) and Langmuir–Hinshelwood (L–H) mechanisms under low-temperature reaction conditions. [ABSTRACT FROM AUTHOR]

Phosphorus (P) is a non-renewable resource, therefore ensuring global food and environmental security depends upon sustainable P management. To achieve this goal, sustainable P management in the upstream and downstream sectors of agriculture from mineral extraction to food consumption must be addressed systematically. The innovation and feasibility of P sustainability are highlighted from the perspective of the whole P-based chain, including the mining and processing of P rock, production of P fertilizers, soil and rhizosphere processes involving P, absorption and utilization of P by plants, P in livestock production, as well as flow and management of P at the catchment scale. The paper also emphasizes the importance of recycling P and the current challenges of P recovery. Finally, sustainable solutions of holistic P management are proposed from the perspective of technology improvement with policy support.

Landau‐Zener (LZ) transitions in the three‐level bow‐tie model (3L‐BTM) in a dissipative environment are investigated by using the numerically accurate method of multiple Davydov D2$\mathrm{D}_{2}$ Ansätze. The 3L‐BTM coupled to a single harmonic mode is first considered, and evolutions of transition probabilities for selected values of model parameters are studied and interpreted with the aid of the energy diagram method. Then the 3L‐BTM coupled to a boson bath of a continuum spectral density is explored. The simulations demonstrate that sub‐Ohmic, Ohmic and super‐Ohmic boson baths have substantially different influences on the 3L‐BTM dynamics, which cannot be grasped by the standard phenomenological Markovian single‐rate descriptions. Novel bath‐induced phenomena are also described, which are absent in two‐level LZ systems. [ABSTRACT FROM AUTHOR]