检索结果-南通市图书馆

Rational catalyst design and mechanistic evaluation for electrochemical nitrogen reduction at ambient conditions

Green Energy & Environment 2023年第6期8卷 1567-1595页

作者： muhammad ibrar ahmed David Brynn Hibbert Chuan Zhao School of Chemistry University of New South WalesSydney 2052Australia Materials and Manufacturing Futures Institute University of New South WalesSydney 2052Australia

Ammonia(NH3), a carbon-free hydrogen carrier, is an important commodity for the food supply chain owing to its high energy capacity and ease of storage and transport. The Haber-Bosch process is currently the favored industrial method for large-scale ammonia production but requires energy-intensive and sophisticated infrastructure which hampers its utilization in a sustainable and decentralized system of *** electrochemical nitrogen reduction reaction(eNRR) at ambient conditions holds great potential for sustainable production of ammonia using electricity generated from renewable energy sources such as solar and wind. However, this approach is limited by a low rate of ammonia production with high overpotential and the competing hydrogen evolution reaction(HER). For a better understanding and utilization of eNRR as a sustainable process, insight into rational catalyst design and mechanistic evaluations by a theoretically-directed experimental approach is imperative. Herein, recent insights into rational catalyst design and mechanisms, based on intrinsic and extrinsic catalytic activity are *** the elucidation of basic principles and mechanisms, a framework supplied by theoretical studies that lead to the optimal selection and development of eNRR catalysts is presented. Following a discussion of recently developed electrocatalysts for eNRR, we outline various recently-used theoretical and experimental methodologies to improve the intrinsic and extrinsic catalytic activity of advanced *** review is anticipated to contribute to the development of active, selective, and efficient catalysts for nitrogen reduction.

关键词： Electrocatalysis Nitrogen reduction reaction Ammonia synthesis Theoretical framework Sustainable energy

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Drought-responsive genes expressed predominantly in root tissues are enriched with homotypic cis-regulatory clusters in promoters of major cereal crops

引用

The Crop Journal 2017年第3期5卷 195-206页

作者： muhammad Ramzan Khan Imran Khan Zahra ibrar Jens Léon Ali ahmed Naz Institute of Crop Science and Resource Conservation(INRES) Department of Crop Genetics and BiotechnologyRheinische Friedrich-Wilhelms University of BonnGermany National Centre for Bioinformatics(NCB) Quaid-i-Azam UniversityIslamabadPakistan National Institute for Genomics and Advanced Biotechnology(NIGAB) National Agricultural Research CentrePark RoadIslamabadPakistan

The root appears to be the most relevant organ for breeding drought stress ***, our knowledge about temporal and spatial regulation of drought-associated genes in the root remains fragmented, especially in crop plants. We performed a meta-analysis of expression divergence of essential drought-inducible genes and analyzed their association with cis-elements in model crops and major cereal crops. Our analysis of42 selected drought-inducible genes revealed that these are expressed primarily in roots,followed by shoot, leaf, and inflorescence tissues, especially in wheat. Quantitative real-time RT-PCR analysis confirmed higher expression of TaDREB2 and TaAQP7 in roots,correlated with extensive rooting and drought-stress tolerance in wheat. A promoter scan up to 2 kb upstream of the translation start site using phylogenetic footprinting revealed708 transcription factor binding sites, including drought response elements(DREs), auxin response elements(Aux REs), MYCREs/MYBREs, ABAREs, and ERD1 in 19 selected ***, these elements were organized into clusters of overlapping transcription factor binding sites known as homotypic clusters(HCTs), which modulate drought physiology in plants. Taken together, these results revealed the expression preeminence of major drought-inducible genes in the root, suggesting its crucial role in drought adaptation. The occurrence of HCTs in drought-inducible genes highlights the putative evolutionary modifications of crop plants in developing drought adaptation. We propose that these DNA motifs can be used as molecular markers for breeding drought-resilient cultivars, particularly in the cereal crops.

关键词： Gene expression Promoter DREB cis-regulatory elements Phylogeny Drought adaptation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Asymptomatic dengue infection in adults of major cities of Pakistan

引用

Asian Pacific Journal of Tropical Medicine 2017年第10期10卷 1002-1006页

作者： ibrar Rafique muhammad Arif Nadeem Saqib muhammad Arif Munir Huma Qureshi Ijaz-ul-Haq Taseer Rizwan Iqbal Waqaruddin ahmed Tasleem Akhtar Rizwanullah Pakistan Health Research Council Head OfficeIslamabadPakistan Pakistan Health Research Council Research CentreNishtar Medical CollegeMultanPakistan Pakistan Health Research Council Research CentreKing Edward Medical UniversityLahorePakistan Pakistan Health Research Council Research CentreJinnah Postgraduate Medical CentreKarachiPakistan Pakistan Health Research Council Research CentreKhyber Medical CollegePeshawarPakistan

Objective: To determine the asymptomatic dengue infection in adults of Pakistani ***: This study was conducted in five major cities(Islamabad, Karachi, Lahore,Multan, and Peshawar) of Pakistan.A total of 5 230 adults aged 18 years and above without a history of dengue fever at any point in their life were enrolled from participating *** who were confirmed for dengue previously were *** the total, 62.6%(n = 3 276) were male with an average age of 34.6 *** were briefed about the objectives of the study, and written consent was obtained to perform dengue Ig G test using enzyme linked immunosorbent *** brief information related to age, gender and area was also taken on ***: Overall 32.3%(n = 1 691) was having asymptomatic dengue infection which was 67.5%(n = 756) in Karachi followed by 39.1%(n = 391) in Islamabad, 29.9%(n =316) in Lahore and 21%(n = 228) in Peshawar and none from *** males were affected with asymptomatic dengue infection than *** asymptomatic dengue infection was significantly higher in different cities; however, there was no significant difference with respect to age ***: The asymptomatic dengue infection is higher in cities ***,Islamabad and Lahore which are at risk of developing secondary dengue *** is a need of awareness among the public about secondary dengue infection.

关键词： Dengue Exposure Secondary dengue infection Asymptomatic

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

PostgreSQL数据库的特点

引用

软件和集成电路 2021年第6期 63-63页

作者： ibrar ahmed PostgreSQL国际社区组 Percona公司

我希望以Postgre SQL为例和大家探讨开源数据库的发展。Postgre SQL对软件行业有哪些帮助呢?我们提供了宽松的开源许可证,用户可以自由下载、修改源代码,并用作商业用途。开源能够使软件的发布效果最大化,因为开源是分布式、开放的,每... 详细信息

我希望以Postgre SQL为例和大家探讨开源数据库的发展。Postgre SQL对软件行业有哪些帮助呢?我们提供了宽松的开源许可证,用户可以自由下载、修改源代码,并用作商业用途。开源能够使软件的发布效果最大化,因为开源是分布式、开放的,每个人都可以使用。专有软件能够使利益最大化,但在开源中,用户对软件及其源代码没有任何控制权。Oracle数据库就是一个很好的例子,用户无法控制Oracle中的软件和源代码。

关键词： Oracle数据库开源数据库 SQL 商业用途专有软件源代码软件行业开源许可证

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：