Results 1 to 10 of about 2,873 (106)
Evaluation and redesign of the primers for detecting nitrogen cycling genes in environments
Abstract A better understanding of how nitrogen (N) cycling genes are involved in ecological processes is one of the crucial areas of microbial ecology. Currently, most molecular biological techniques investigating N cycling genes in the environment heavily rely on the accuracy of the polymerase chain reaction (PCR) primers; however, their specificity ...
Zhujun Wang +12 more
wiley +1 more source
采用折点加氯法去除脱硫废水中的氨氮,通过响应面法考察了pH、n(Cl)/n(N)和初始氨氮浓度对氨氮去除效果的影响。结果表明,pH对出水氨氮浓度的线性效应显著,n(Cl)/n(N)和初始氨氮浓度对出水氨氮浓度的线性效应极显著。通过该方法可以得到不同初始氨氮浓度条件下,满足出水氨氮达标排放的pH和n(Cl)/n(N)。折点加氯可有效去除脱硫废水中的氨氮,出水氨氮满足《污水综合排放标准》(GB 8978—1996)中一级标准的要求。
胡大龙 +7 more
doaj
氨态氮和亚硝态氮是虾类养殖环境中最主要的外来和自身污染物.在1 mg/L非离子氨态氮和1 mg/L亚硝态氮的作用条件下,罗氏沼虾总血细胞计数均有减少,且亚硝态氮的短期作用大于氨态氮;透射电镜观察结果表明,在氨态氮和亚硝态氮作用前后,罗氏沼虾血细胞超微结构发生改变,透明细胞、半颗粒细胞和颗粒细胞这三种血细胞的粗面内质网、核糖体和线粒体数量减少,其中以氨态氮作用引起的血细胞超微结构的变化幅度较大.这说明1 mg/L的非离子氨态氮和亚硝态氮对罗氏沼虾总血细胞计数和超微结构具有显著的影响.
HUYi-bo(胡义波) +2 more
doaj +1 more source
对轮作及大豆、玉米、小麦长期连作白浆土中氮含量及有机态氮组分变化进行研究。结果表明,在不施肥情况下,小麦连作区土壤由全氮、碱解氮降幅最大,酸解总氮、氨基酸态氮和氨基糖态氮降幅最小。在施有机肥情况下,土壤全氮、碱解氮及酸解总氮则以小麦连作区增幅最小,玉米连作区增幅最大;氨基酸态氮和氨基糖态氮在轮作区增幅最大。其他组分氮在轮作与连作小区间变化无规律。
田秀平, 薛菁芳, 韩晓日
doaj +2 more sources
Atomically Thin Sn:GaN‐GaN Homojunction for High‐Sensitivity β‐Ray Detection
ABSTRACT Gallium nitride (GaN), a third‐generation wide‐bandgap semiconductor renowned for its superior radiation tolerance, holds promise for advanced β‐ray detection. Herein, a scalable liquid metal‐assisted in situ synthesis method is presented to fabricate Sn‐doped GaN homojunctions via gallium oxide printing followed by ammonolysis, enabling ...
Weiqing Liu +8 more
wiley +1 more source
Electrolyte With Functionalized Boron Nitride Nanosheets for Dendrite‐Free Lithium Metal Anodes
ABSTRACT Lithium metal batteries (LMBs) are regarded as promising candidates for the next‐generation high‐energy‐density storage systems due to their unparalleled theoretical energy density and low redox potential. However, the commercialization of LMBs is tremendously plagued by the barbaric growth of lithium dendrite and the intricate decomposition ...
Ji Zhou +5 more
wiley +1 more source
ABSTRACT Periodontitis is a chronic infectious oral disease triggered by periodontopathogenic bacteria, resulting in the progressive inflammation and destruction of the tissues surrounding teeth. To achieve reprogramming of the infectious microenvironment for periodontitis therapy, a nanoformulation was proposed by loading polydopamine (PDA) with ...
Hao Liang +14 more
wiley +1 more source
ABSTRACT The electrocatalytic reduction of nitrate (NO3ER) has emerged as a promising strategy for mitigating NO3− ${{\text{NO}}_{3}}^{-}$ pollution in wastewater while concurrently producing value‐added ammonia; however, its process is significantly hindered by the lack of highly efficient and low‐cost electrocatalysts. Herein, we proposed several non‐
Xue‐Shi Song +5 more
wiley +1 more source
Lithology modulates soil priming effect via resource limitations and bacterial community structure
Read the free Plain Language Summary for this article on the Journal blog. Abstract The soil priming effect (PE), triggered by root exudate inputs that stimulates microbial activity and drives significant soil carbon (C) losses in terrestrial ecosystems.
Xinyu Hou +4 more
wiley +1 more source
Read the free Plain Language Summary for this article on the Journal blog. Abstract Interactions between plants and soil microorganisms in the rhizosphere are vital for maintaining the nutrient cycle and stability of terrestrial ecosystems. Nitrogen, closely related to carbon (C) cycling and ecosystem productivity, undergoes transformation by soil ...
Ru Wang +9 more
wiley +1 more source

