Investigating immobilization efficiency of Pb in solution and loess soil using bio-inspired carbonate precipitation.

Immobilizing copper in loess soil using microbial-induced carbonate precipitation: Insights from test tube experiments and one-dimensional soil columns.

Feasibility study of applying electrokinetic technology coupled with enzyme-induced carbonate precipitation treatment to Cu- and Pb-contaminated loess remediation

Abstract Soil pollution from potentially toxic elements (PTEs) is a serious environmental issue worldwide that affects agricultural safety and human health. Arbuscular mycorrhizal fungi (AMF), as ecosystem engineers, can alleviate PTE toxicity in crop plants. However, the comprehensive effects of AMF on crop performance in PTE-contaminated soils have not yet been recognized globally. Here, a meta-analysis of 153 studies with 3213 individual observations was conducted to evaluate the effects of AMF on the growth and PTE accumulation of five staple crops (wheat, rice, maize, soybean, and sorghum) in contaminated soils. Our results demonstrated that AMF had strong positive effects on the shoot and root biomass. This is because AMF can effectively alleviate oxidative damage induced by PTEs by stimulating photosynthesis, promoting nutrition, and activating non-enzymatic and enzymatic defense systems in crop plants. AMF also decreased shoot PTE accumulation by 23.6% and increased root PTE accumulation by 0.8%, demonstrating that AMF effectively inhibited the PTE transfer and uptake by crop shoot. Meanwhile, AMF-mediated effects on shoot PTE accumulation were weaker in soils with pH > 7.5. Overall, this global survey has essential implications on the ability of AMF to enhance crop performance in PTE-contaminated soils and provides insights into the guidelines for safe agricultural production worldwide. Graphical abstract

Influences of arbuscular mycorrhizal fungi on crop growth and potentially toxic element accumulation in contaminated soils: A meta-analysis

Evaluating gas breakthrough pressure and gas permeability in a landfill cover layer for mitigation of hazardous gas emissions.

Inappropriate handling of copper-rich water bodies could cause serious threats to surrounding environments and human health. Remedying Cu2+ using the environmental-friendly MICP technology starts drawing great attention from scientists and practitioners, but a rather low Cu immobilization efficiency has been reported in a significant body of research. The present work investigated how the degree of urea hydrolysis and pH surrounding conditions varied with the effect of culture medium, bacterial suspension dosage, and CaCl2 addition using the test tube experiments. The speciation of carbonate precipitation was further analysed by the numerical simulations to reveal the underlying mechanisms affecting the Cu immobilization efficiency. The results indicated that a low Cu immobilization efficiency is attained either using lower or higher degrees of urea hydrolysis. Although higher bacterial suspension dosages cause an improvement in the resistance of the ureolytic bacteria against the effect of Cu toxicity, pH surrounding is lifted up, promoting the formation of copper-ammonia complex and imposing risks of Cu2+ migration. A combination of yeast extract and CaCl2 addition can not only improve the degree of urea hydrolysis by competing for adsorption with Cu2+ but also accelerate the consumption of OH-, thereby securing the Cu immobilization efficiency. The findings shed light on the potential of applying the MICP technology to copper-rich water bodies immobilization. 

Revealing Degradation and Enhancement Mechanisms Affecting Copper (Cu) Immobilization Using Microbial-induced Carbonate Precipitation (MICP)

Immobilizing of lead and copper using chitosan-assisted enzyme-induced carbonate precipitation.

This article uses unascertained mathematics measure model to assess energy-saving conditions of construction management process. The target of this method is minimum energy consumption in the whole system of construction and is to identify factors which may cause energy wasting happen during construction. This method can prevent the occurrence of energy waste. In order to do the quantitative analysis and evaluation of the energy-saving condition, it may changes the abstract qualitative problem into a quantitative index of energy-saving. The measure results obtained can reflect energy-saving conditions in construction management process of construction enterprises exhaustively and objectively.

The application of unascertained mathematics in energy-saving assessment of construction management process

Abstract Acute promyelocytic leukemia (APL) is highly aggressive and is frequently associated with disseminated intravascular coagulation and high early death rates. Although all-trans retinoic acid (RA) induces complete remission in a high proportion of patients with APL, there are limited treatments for APL patients with RA resistance. Here we report an atypical APL patient, with an APL-like disease that developed very slowly without anti-leukemia therapy for nearly 2 years. During that time, the patient only intermittently received anti-HBV drugs, i.e., the combination of adefovir dipivoxil (ADV) and entecavir (ETV), leading us to hypothesize that ADV and/or ETV could inhibit APL progression. Our results showed that anti-HBV drugs ADV and ETV both exhibited significantly inhibitory effects on APL cells, and ADV indicated a much greater cytotoxic effect than ETV on APL cells. We further found that ADV significantly promoted APL cell differentiation and apoptosis, thereby restraining the progression of APL. Most importantly, our study uncovered a novel mechanism of ADV prohibiting APL progression, which was mediated, at least in part, by inhibition of TRIB3 and degradation of the oncoprotein PML-RARA, therefore leading to APL cell differentiation and apoptosis. Taken together, our study demonstrated that ADV, an anti-HBV drug, had significantly inhibitory effects on APL, and provided a novel therapeutic strategy for APL patients with RA resistance. 

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Bin Zhang

Papers

Investigating immobilization efficiency of Pb in solution and loess soil using bio-inspired carbonate precipitation.

Revealing Degradation and Enhancement Mechanisms Affecting Copper (Cu) Immobilization Using Microbial-induced Carbonate Precipitation (MICP)

Immobilizing of lead and copper using chitosan-assisted enzyme-induced carbonate precipitation.

The application of unascertained mathematics in energy-saving assessment of construction management process

Adefovir dipivoxil inhibits APL progression through degradation of the oncoprotein PML-RARA