检索结果-南通市图书馆

Review on Zinc Oxide Nanoparticles: Antibacterial Activity and Toxicity Mechanism

Nano-Micro Letters 2015年第3期7卷 219-242页

作者： Amna Sirelkhatim Shahrom Mahmud Azman Seeni Noor Haida Mohamad Kaus Ling Chuo Ann siti khadijah mohd bakhori Habsah Hasan Dasmawati Mohamad Nano-Optoelectronics Research and Technology Laboratory (N.O.R.Lab) School of Physics Universiti Sains Malaysia Advanced Medical and Dental Institute Cluster of Integrative Medicine Universiti Sains Malaysia School of Chemical Sciences Universiti Sains Malaysia Nano-Optoelectronics Research and Technology Laboratory(N.O.R.Lab) School of Physics Universiti Sains Malaysia Department of Medical Microbiology Parasitology and Immunology School of Medical Sciences Universiti Sains Malaysia School of Dental Sciences Universiti Sains Malaysia

Antibacterial activity of zinc oxide nanoparticles(Zn O-NPs) has received significant interest worldwide particularly by the implementation of nanotechnology to synthesize particles in the nanometer region. Many microorganisms exist in the range from hundreds of nanometers to tens of micrometers. Zn O-NPs exhibit attractive antibacterial properties due to increased specific surface area as the reduced particle size leading to enhanced particle surface reactivity. Zn O is a bio-safe material that possesses photo-oxidizing and photocatalysis impacts on chemical and biological species. This review covered Zn O-NPs antibacterial activity including testing methods, impact of UV illumination, Zn O particle properties(size, concentration, morphology, and defects), particle surface modification, and minimum inhibitory concentration. Particular emphasize was given to bactericidal and bacteriostatic mechanisms with focus on generation of reactive oxygen species(ROS) including hydrogen peroxide(H2O2), OH-(hydroxyl radicals), and O2-2(peroxide). ROS has been a major factor for several mechanisms including cell wall damage due to Zn O-localized interaction, enhanced membrane permeability, internalization of NPs due to loss of proton motive force and uptake of toxic dissolved zinc *** have led to mitochondria weakness, intracellular outflow, and release in gene expression of oxidative stress which caused eventual cell growth inhibition and cell death. In some cases, enhanced antibacterial activity can be attributed to surface defects on Zn O abrasive surface texture. One functional application of the Zn O antibacterial bioactivity was discussed in food packaging industry where Zn O-NPs are used as an antibacterial agent toward foodborne diseases. Proper incorporation of Zn O-NPs into packaging materials can cause interaction with foodborne pathogens, thereby releasing NPs onto food surface where they come in contact with bad bacteria and cause the bacterial death and/or in

关键词： Antibacterial activity Zn O-NPs Toxicity mechanism Reactive oxygen species Zinc ions release Food antimicrobial

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

Pest and disease incidence of coniferous species in Taman Saujana Hijau,Putrajaya urban park,Malaysia

引用

林业研究:英文版 2023年第6期34卷 2065-2077页

作者： Nura Adila Shamsul Kamar siti khadijah Abd Rahim Annya Anak Ambrose Norida Hanim Awing Zaiton Samdin Aff endy Hassan mohd Nazre Saleh Razak Terhem Laboratory of Forest Pathology and Tree Health Department of Forestry Science and BiodiversityFaculty of Forestry and EnvironmentUniversiti Putra Malaysia UPM43400 SerdangSelangorMalaysia Industrial Forest Research Centre Sarawak Forest Department93250 KuchingSarawakMalaysia Laboratory of Sustainable Bioresource Management(BIOREM) Institute Tropical Forestry and Forest Products(INTROP)Universiti Putra Malaysia UPM43400 SerdangSelangorMalaysia Faculty of Tropical Forestry Universiti Malaysia Sabah88400 Kota KinabaluSabahMalaysia School of Business and Economics Universiti Putra Malaysia43400 SerdangSelangorMalaysia

Taman Saujana Hijau(TSH),Putrajaya is a 41-ha urban park planted with various coniferous species from around the *** pests and disease incidences of this park are unknown and there is a need for an evaluation of the health status of this urban *** study assessed the level of pest and disease incidents of coniferous species in 12 plots of 7 species(Araucaria bidwilii,Araucaria haterophylla,Araucaria cunninghamii,Pinus caribaea,Pinus merkusii,Podocarpus polystachyus,and Podocarpus costalis).Termites,canker disease,and foliar disease are three major *** highest pest and disease incidence(PnDI)was foliar disease with a 0.49 coefficient correlation between the total number of trees and the PnDI,followed by canker disease with 0.40,and termites with *** the seven conifers,*** was the most infected followed by *** and *** was concluded that the incidence of pests and diseases in TSH was *** our knowledge,this may be the first baseline inventory of pests and diseases of coniferous species in Malaysia.

关键词： Canker disease Coniferous species Foliar disease Pest and disease incidence Urban park

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

Depression,Anxiety,and Behavioural Changes during the COVID-19 Pandemic among Medical and Nursing Students

引用

International Journal of Mental Health Promotion 2022年第5期24卷 749-757页

作者： siti Roshaidai mohd Arifin siti Mardhiah Saiful Azmi khadijah Hasanah Abang Abdullah Nurul Ain Hidayah Abas Rohayah Husain Edre MAidid Karimah Hanim Abd Aziz Ramli Musa Fathima Begum Syed Mohideen Asma Perveen Khairi Che Mat Izazol Idris Department of Special Care Nursing Kulliyyah of NursingInternational Islamic University MalaysiaIndera Mahkota CampusKuantan25200Malaysia Thomson Hospital Kota Damansara Petaling Jaya47810Malaysia Faculty of Medicine and Health Sciences Universiti Sains Islam MalaysiaBandar Baru Nilai71800Malaysia Department of Psychology and Counselling Faculty of Human DevelopmentUniversiti Pendidikan Sultan IdrisTanjong Malim35900Malaysia Psychological Medicine Unit Faculty of MedicineUniversiti Sultan Zainal AbidinKuala Terengganu21300Malaysia Department of Community Medicine Kulliyyah of MedicineInternational Islamic University MalaysiaIndera Mahkota CampusKuantan25200Malaysia Department of Psychiatry Kulliyyah of MedicineInternational Islamic University MalaysiaIndera Mahkota CampusKuantan25200Malaysia Department of Educational Studies Faculty of Human DevelopmentUniversiti Pendidikan Sultan IdrisTanjong Malim35900Malaysia

During the COVID-19 pandemic,medical and nursing students are faced with various challenges such as the need to attend online classes and juggling clinical postings under the new *** study aimed to assess the asso-ciation between depression,anxiety,and behavioural changes among medical and nursing students during the COVID-19 *** online self-administered questionnaire was distributed between March 2021 and July 2021 to 292 undergraduates medical and nursing students in a higher education institute on the East Coast of *** questionnaires consisted of four parts:sociodemographic data,the Generalised Anxiety Disor-der-7,the Patient Health Questionnaire-9,and questions related to behaviours during the COVID-19 *** study found that 23.6%and 33.6%of the students experienced anxiety and depression respectively,possibly caused by the COVID-19 *** was associated with a high level of behavioural changes during the pandemic with a total of 87%of the students showing behavioural *** interventions such as online counselling and consultation should be implemented by the university to reduce the prevalence of depres-sion and anxiety resulting from the COVID-19 pandemic among medical and nursing students.

关键词： Nursing students medical students depression anxiety behavioural changes pandemic COVID-19

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

Discovery of Simple Sequence Repeat Markers through Transcriptome Analysis of Baccaurea motleyana

引用

Journal of Food Science and Engineering 2020年第2期10卷 33-46页

作者： Khairun Hisam Nasir Muhammad Fairuz mohd Yusof mohd Shahril Firdaus Abdul Razak siti NorsaidahIbrahim Mira Farzana Mohamad Moktar khadijah Awang mohd Shukri Mat Ali Centre for Molecular Marker Discovery and Validation(CMDV) Agri-Omic dan BioinformaticsBiotechnology and Nanotechnology Research CentreMalaysian Agricultural Research and Development Institute(MARDI)Serdang 43400SelangorMalaysia Industrial Crop Research Centre Malaysian Agricultural Research and Development Institute(MARDI)Serdang 43400SelangorMalaysia Horticulture Research Centre Malaysian Agricultural Research and Development Institute(MARDI)Serdang 43400SelangorMalaysia

Baccaurea motleyana(rambai)is underutilized fruits that are native to Malaysia,Indonesia and *** this study,a total of 54,779 unigenes identified from rambai transcriptome were used for simple sequence repeat(SSR)analysis by MIcroSAtellite(MISA).A total of 20,420 SSRs were found to be distributed within 37.27%of the total number of *** repeats represented the main type,accounting for 64.04%,followed by trinucleotide repeats(20.28%)and dinucleotide repeats(19.94%).Gene annotation to seven databases has a success ratio of 68.53%(National Center for Biotechnology Information(NCBI)protein sequences),53.68%(NCBI nucleotide sequences),27.43%(Kyoto Encyclopedia of Genes and Genome Ortholog),56.0%(SwissProt),52.44%(Protein family),53.99%(Gene Ontology)and 26.44%(Kluster of Orthologous Group).Further rambai SSRs were randomly selected and validated to ***(rambai),***(tampoi),***(jentik-jentik),***(pupor)and ***(setambun).

关键词： Baccaurea SSR transcriptome gene annotation and SSR validation

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

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：