检索结果-南通市图书馆

Co-production of biochar and carbon nanotube from sewage sludge in a two-stage process coupling pyrolysis and catalytic chemical vapor deposition

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

WASTE DISPOSAL & SUSTAINABLE ENERGY 2024年第3期6卷 323-334页

作者： Ghazali, mohd Syazwan mohd zaini, mohd saufi md Arshad, Muhammad Syed-Hassan, Syed Shatir A. Univ Teknol MARA Coll Engn Sch Chem Engn Shah Alam 40450 Selangor Malaysia Univ Kuala Lumpur Malaysia Inst Chem & Bioengn Sect Environm Engn Alor Gajah 78000 Melaka Malaysia Univ Teknol MARA Cawangan Terengganu Coll Engn Chem Engn Studies Kampus Bukit Besi Dungun 23200 Terengganu Malaysia Jhang Campus Univ Vet & Anim Sci Dept Basic Sci Lahore Pakistan

This study explores the potential of valorizing sewage sludge as a carbon source for the co-production of biochar and carbon nanomaterial via a two-stage thermal-catalytic process. In the first stage, sewage sludge underwent slow pyrolysis, resulting in a biochar yield of 66% (in weight) at 550 degrees C. The resulting pyrolysis vapor was then introduced into a second reactor, where catalytic chemical vapor deposition (CCVD) took place in the presence of a cobalt catalyst, leading to the production of carbon nanotubes (CNTs). It was found that CNTs with an inner diameter of similar to 3.2 nm and an outer diameter of 20-40 nm can be formed in the second stage reactor at temperatures between 650 degrees C and 950 degrees C with a maximum yield of 30% (in weight) under the employed experimental conditions. The obtained CNTs displayed a multiwall structure, exhibited a lack of crystallinity, and demonstrated a high level of disorder. The research findings also indicate that temperature exerts a significant influence on both the yield and properties of the CNTs synthesized.

关键词： Sewage sludge Pyrolysis CCVD Carbon nanotube Biochar

Prediction of Whitefly Population and Infestation Based on Multitrophic Analysis between Competitor Pest,Plant Traits and Natural Enemy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Agricultural Science and Technology(A) 2019年第5期9卷 294-309页

作者： mohd Rasdi zaini Noor Shuhaina Shaikh Mazran Che Salmah md Rawi Alshami Salman Department of Entomology Faculty of Plantation and AgrotechnologyUniversity Teknologi MARA(UiTM)Cawangan Melaka Campus JasinMelaka 77300Malaysia Department of Entomology Faculty of Plantation and AgrotechnologyUniversity Teknologi MARA(UiTM)Shah Alam 45400Malaysia School of Biological Sciences Universiti Sains MalaysiaPenang 11800Malaysia

Interaction among arthropods(insect-acarine)was investigated at all trophic levels in agro-ecosystem and affects the population dynamic and diversification of arthropod pests and intensity of natural enemy(parasitism)as well as stimulates the plant chemical *** the present study of two cropping periods,nutrient concentration and early infestation of plant-sucking pests are known to trigger different degrees of interactions(plant’s parameters)which potentially alert abundance and diversity of the insect *** interaction and magnitude of impact could be assessed(multivariate analysis of variance(MANOVA)and redundancy analysis(RDA))and observed between arthropods(insect-acarine)community and plants’parameters from the strongest to the lowest *** two factors could have affected the community of insect-pests with various degrees of pressure effect and interaction that occurred naturally,thus leading to the predictable abundance of insect-acarine populations under eggplant leaves in response to plant physical characteristics(e.g.,size of leaves,number of leaves and plant height)and biochemical constituents(flavonoid,phenolic,peroxidase andβ-1,3-glucanase).Based on multivariate analyses of multitrophic interaction,MANOVA and RDA have the potential to elucidate the complex interaction among plant performance,abundance of pests and activity chemical defence *** analyses interpreted similar interactions of measured parameters in different *** population in this study was predictable by aphids,thrips and total phenolic contents in *** has capable defence systems against insect-acarine pests after stimulation(pre-infestation).In relation to IPM strategy,early stages of plant growth are known as susceptible periods for pests attack but the plant becomes more tolerant during the fruiting stage.

关键词： Multitrophic insect interaction whitefly aphids thrips and eggplant

I-PRESENT<sup>TM</sup>: An Involutive Lightweight Block Cipher

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Information Security 2014年第3期5卷 114-122页

作者： Muhammad Reza Z’aba Norziana Jamil mohd Ezanee Rusli md. zaini Jamaludin Ahmad Azlan mohd Yasir College of Information Technology Universiti Tenaga Nasional Kajang Malaysia CoRE Expert Systems Sdn. Bhd. Office 1 Level 2 Resource Centre Technology Park Malaysia Kuala Lumpur Malaysia MIMOS Berhad Kuala Lumpur Malaysia

This paper proposes a new involutive light-weight block cipher for resource-constraint environments called I-PRESENTTM. The design is based on the Present block cipher which is included in the ISO/IEC 29192 standard on lightweight cryptography. The advantage of I-PRESENTTM is that the cipher is involutive such that the encryption circuit is identical to decryption. This is an advantage for environments which require the implementation of both circuits. The area requirement of I-PRESENTTM compares reasonably well with other similar ciphers such as PRINCE.

关键词： Block Cipher Lightweight Cryptography PRESENT PRINCE Cryptanalysis

Toxicity of selected insecticides against nymph of whitefly （Bemisia tabaci Gennadius）

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Agricultural Science and Technology 2009年第4期3卷 32-39页

作者： Hazmi Awang Damit Fauziah Ismail Low Seng Mook Siti Noor Hajjar md Latip mohd Rasdi zaini Fairuz Khalid Kamaruzaman Jusoff Faculty of Applied Science Universiti Teknologi MARA Selangor 40450 Malaysia Faculty of Applied Science Universiti Teknologi MARA Pahang 40450 Selangor 40450 Malaysia Department of Forest Production Faculty of Forestry Universiti Putra Malaysia Selangor 43400 Malaysia

Bemisia tabaci is one of serious insect pests attacking vegetables and has been difficult to control using conventional insecticides. In the past 10 years, new insecticides have been introduced that provide a diversity of novel modes of action and routes of activity to effectively control whitefly. Consequently, intensive used of insecticides in vegetable cultivation has resulted in reduced susceptibility and develops resistance in agriculture industry. In controlling B. tabaci population, insecticides are the common method used by farmers. This study aimed to determine the most effective insecticide against B tabaci by using LC5o value. This study was conducted at the Crop Protection Laboratory, Faculty of Applied Science, Universiti Teknologi MARA Malaysia with the controlled room temperature of 24.33 ± 0.14℃ with dark and light ratio of 1：1 （12 hours： 12 hours） is an ideal condition for rearing the insect. The hypothesis of the study is to test if insecticides can control the nymph of whitefly. A total of 50 two-day-old nymphs were treated with insecticides using leaf-dip bioassay procedure. This experiment was replicated three times. The survival rates of the nymphs were analyzed using analysis of variance （ANOVA）. Data on toxicity was analyzed by a special Probit Programme-Single Line Analysis based on Finney （1971）. There was a significant difference （df = 8, F = 85.84, P = 0.000） in survival rate of nymph ofB. tabaci to eight insecticides tested. Among the insecticides tested, dimethoate, chlorpyrifos ＋ cypermethrin and diafenthiuron showed significantly higher survival rate of nymph compared to other treatments. When LC50 values were compared for diafenthiuron which is less potent （LCs0 ---- 2.44）, abamectin was found to be 3.44 times more potent than diafenthiuron, followed by esfenvalerate,acetamiprid, profenofos, chlorpyrifos ＋ cypermethrin and dimethoate, and the least potent was deltamethrin. The toxicity of eight insecticides tested against nymphs was

关键词： toxicity insecticide lethal concentration relativepotency whitefly