Search results for: Le Kang

Items from 1 to 20 out of 185 results

article

Revisiting the ‘magic condition’ on the basis of the Takagi–Taupin theory

Yu-Hang Wang, Ming Li, Le Kang, Quan-Jie Jia

Journal of Applied Crystallography > 57 > 5 > 1344 - 1357

A numerical framework based on the integral solution of the Takagi–Taupin equations has been developed for cylindrically bent Laue crystals. On the basis of this framework, diffraction geometries that satisfy the `magic condition' have been studied from the perspective of dynamical theory. The numerical findings indicate that, in certain diffraction geometries, the focusing behaviour of cylindrically...

article

Novel design of compact quad‐band divider using stepped impedance coupled lines

Xinhuai Wang, Xin Li, Yin Xu, Wen Wang, more

Microwave and Optical Technology Letters > 66 > 2 > n/a - n/a

This letter presents a novel compact quad‐band power divider using stepped impedance coupled lines. The power divider adopts a stepped impedance coupling line with two transmission zeros as the primary transmission unit and forms a flexible quad‐band in the architecture of the second‐order power divider design through clever impedance matching and transmission zeros design. In addition, the complete...

article

Biodegradable nanocomposites prepared from poly(butylene adipate terephthalate) and silver nanoparticles for applications as disposable medical equipments

Xinshuang Zhao, Le Kang, Baogang Zhang, Li Liu, more

Polymers for Advanced Technologies > 35 > 1 > n/a - n/a

Silver nanoparticles (AgNPs) were prepared using polyvinylpyrrolidone (PVP) as reducing and stabilizing agent. AgNPs were then embedded in a biodegradable poly(butylene adipate terephthalate) (PBAT) matrix by solution casting. The resulted PBAT/AgNPs nanocomposite films were characterized using various analytical techniques such as scanning electron microscopy (SEM), colorimeter, Ultraviolet–visible...

article

Nitrogen‐Doped Graphene Quantum Dots as Electrochemiluminescence‐Emitting Species for Sensitive Detection of KRAS G12C Mutation via PET‐RAFT**

Lele Ma, Le Kang, Yuzhi Sun, Jingwen Liu, more

Chemistry – A European Journal > 29 > 65 > n/a - n/a

The levels of KRAS G12C point mutation is recognized to be closely related to the earlier diagnosis of non‐small cell lung cancer (NSCLC). Here, based on nitrogen‐doped graphene quantum dots (NGQDs) and photo‐induced electron/energy transfer reversible addition‐fragment chain transfer (PET‐RAFT) signal amplification strategy, we fabricated a novel electrochemiluminescence (ECL) biosensor for the detection...

article

Finite‐element simulation for crystals with surface undulations based on Takagi–Taupin theory

Yu-Hang Wang, Ming Li, Le Kang, Quan-Jie Jia

Journal of Applied Crystallography > 56 > 2 > 391 - 400

A finite‐element method based on a weak formulation of the Takagi–Taupin equations was adopted to study the X‐ray diffraction of crystals with surface undulations. A general diffraction geometry was simulated to investigate the diffraction features caused by the surface undulations. The numerical results reveal that the effects of surface undulations on Bragg diffraction are local for those limited...

article

Planarized quasi‐self‐complementary antenna design with ground‐cooperative radiating for mobile terminal applications

Hui Li, Peng Zhang, Ke Dong, Le Kang

International Journal of RF and Microwave Computer‐Aided Engineering > 32 > 9 > n/a - n/a

This paper presents a multiband antenna implemented on mobile terminals' simple and planar quasi‐self‐complementary (QSC) structure. A wideband antenna is initially developed by employing a triangular patch, and its complementary triangular slot etched on the ground. Then the ground‐cooperative radiating method is combined with the QSC structure. This combination helps to introduce more resonant current...

article

Noninvasive examination of the cardiac properties of insect embryos enabled by optical coherence tomography

Ya Su, Jiangling Fan, Xiuli Wang, Xiaoxiao Wang, more

Journal of Biophotonics > 15 > 6 > n/a - n/a

Understanding the cardiac properties of insect embryos at different development stages is important, however, few works have been conducted probably due to the lack of effective tools. Using locust embryos as an example, here we show, for the first time, that optical coherence tomography (OCT) is capable of obtaining detailed information of embryos' heart activities and irregularities, such as the...

article

A novel non‐invasive identification of genome editing mutants from insect exuviae

Xiao‐Xiao Wang, Jing Li, Tong‐Xin Wang, Yi‐Nuo Yang, more

Insect Science > 29 > 1 > 21 - 32

With the wide application of genome editing in insects, a simple and efficient identification method is urgently needed to meet the increasing demand for mutation detection. Here, taking migratory locusts as a model system, we developed a non‐invasive method to accurately identify genome‐edited mutants by using DNA from insect exuviae. We compared the quantity and quality of genomic DNA from exuviae...

article

Funding of health professional education: China’s 20‐year process and a global comparison

Hongbin Wu, Wenzhuo Li, A’na Xie, Le Kang, more

Medical Education > 55 > 12 > 1419 - 1427

Context Funding is an essential requirement for ensuring the quality of health professional education worldwide. Adequate funding is of immense significance in training health professionals. Due to the difficulty of accessing relevant data, quantitative research of the kind is scarce. Objectives This study aims at analysing the trends of funding levels and funding sources for health professional...

article

Outcomes of short‐duration antiviral prophylaxis for hepatitis C positive donor kidney transplants

Gaurav Gupta, Idris Yakubu, Yiran Zhang, Pamela Kimball, more

American Journal of Transplantation > 21 > 11 > 3734 - 3742

Trials describing 4‐ to 12‐week courses of direct‐acting antiviral drugs (DAAs) to treat hepatitis C virus (HCV) transmission from infected donors to uninfected kidney transplant recipients (D+/R− transplants) may be limited in “real‐world” application by costs and delayed access to DAAs. We previously reported HCV transmission of 13% among D+/R− transplants with 2‐ to 4‐day pangenotypic sofosbuvir/velpatasvir...

article

Characterization of protein–protein interactions between rice viruses and vector insects

Junjie Zhu, Fatma Elzahraa Eid, Lu Tong, Wan Zhao, more

Insect Science > 28 > 4 > 976 - 986

Planthoppers are the most notorious rice pests, because they transmit various rice viruses in a persistent‐propagative manner. Protein–protein interactions (PPIs) between virus and vector are crucial for virus transmission by vector insects. However, the number of known PPIs for pairs of rice viruses and planthoppers is restricted by low throughput research methods. In this study, we applied DeNovo,...

article

Epigallocatechin‐3‐gallate induces autophagy‐related apoptosis associated with LC3B II and Beclin expression of bladder cancer cells

Zhaofa Yin, Juan Li, Le Kang, Xiangyang Liu, more

Journal of Food Biochemistry > 45 > 6 > n/a - n/a

The incidence of bladder cancer in traditional green tea‐consuming countries was dramatically lower than low green tea‐consuming countries. Epigallocatechin‐3‐gallate (EGCG), an active ingredient extracted from green tea, showed effective inhibition of formation and progression of many tumors. However, whether autophagy involved in this tumor‐suppression mechanism of EGCG on bladder cancer was still...

article

Feeding of pea leafminer larvae simultaneously activates jasmonic and salicylic acid pathways in plants to release a terpenoid for indirect defense

Jun‐Nan Yang, Jia‐Ning Wei, Le Kang

Insect Science > 28 > 3 > 811 - 824

The pea leafminer, Liriomyza huidobrensis, is an important pest species affecting ornamental crops worldwide. Plant damage consists of oviposition and feeding punctures created by female adult flies as well as larva‐bored mines in leaf mesophyll tissues. How plants indirectly defend themselves from these two types of leafminer damage has not been sufficiently investigated. In this study, we compared...

article

FAWMine: An integrated database and analysis platform for fall armyworm genomics

Pengcheng Yang, Depin Wang, Wei Guo, Le Kang

Insect Science > 28 > 3 > 590 - 601

Fall armyworm (Spodoptera frugiperda), a native insect species in the Americas, is rapidly becoming a major agricultural pest worldwide and is causing great damage to corn, rice, soybeans, and other crops. To control this pest, scientists have accumulated a great deal of high‐throughput data of fall armyworm, and nine versions of its genomes and transcriptomes have been published. However, easily...

article

Improv to improve medical student communication

Catherine E Grossman, Megan Lemay, Le Kang, Elizabeth Byland, more

The Clinical Teacher > 18 > 3 > 301 - 306

Background Effective patient provider communication skills can be difficult and time‐consuming to teach. Deliberate practice of communication skills through improvisational theatre exercises, with structured debriefing, can provide a solution for teaching patient‐centred communication skills in time‐limited settings. The objective of this study was to determine if improvisational theatre exercises...

article

Interactive effect of photoperiod and temperature on the induction and termination of embryonic diapause in the migratory locust

Xiaoxiao Wang, Jiangling Fan, Meng Zhou, Ge Gao, more

Pest Management Science > 77 > 6 > 2854 - 2862

BACKGROUND Diapause plays a vital role in the survival and population reproduction of the migratory locust in temperate regions. Although some studies have suggested that photoperiod and temperature are two important environmental factors involved in the induction and termination of embryonic diapause in locusts, the independent or synergetic roles of these two factors are still unclear. RESULTS...

article

Transformation of glycerate kinase (GLYK) into Metarhizium acridum increases virulence to locust

Xiwen Tong, Yundan Wang, Juan Li, Shuai Hu, more

Pest Management Science > 77 > 3 > 1465 - 1475

BACKGROUND Improvements in the virulence of the fungal pathogen Metarhizium acridum can crucially promote its efficacy to control locusts and grasshoppers. The polysaccharide components of the cell wall remarkably contribute to fungal virulence. RESULTS Here we found that M. acridum lacked the gene families of glycerate‐3‐kinase (GLYK) as the synthesis enzymes of saccharides. We then generated...

article

Impact of belatacept conversion on kidney transplant function, histology, and gene expression ‐ a single‐center study

Gaurav Gupta, Marc Raynaud, Dhiren Kumar, Pooja Sanghi, more

Transplant International > 33 > 11 > 1458 - 1471

Prior studies on belatacept conversion from calcineurin inhibitor (CNI) have been limited by an absence of postconversion surveillance biopsies that could underestimate subclinical rejection, or a case‐controlled design. A total of 53 adult patients with allograft dysfunction underwent belatacept conversion (median: 6 months) post‐transplant. At a median follow‐up = 2.5 years, patient survival was...

article

JumpDetector: An automated monitoring equipment for the locomotion of jumping insects

Feng Zhou, Le Kang, Xian‐Hui Wang

Insect Science > 27 > 3 > 613 - 624

Continuous jumping behavior, a kind of endurance locomotion, plays important roles in insect ecological adaption and survival. However, the methods used for the efficient evaluation of insect jumping behavior remain largely lacking. Here, we developed a locomotion detection system named JumpDetector with automatic trajectory tracking and data analysis to evaluate the jumping of insects. This automated...

article

Ultra‐short duration direct acting antiviral prophylaxis to prevent virus transmission from hepatitis C viremic donors to hepatitis C negative kidney transplant recipients

Gaurav Gupta, Idris Yakubu, Chandra S. Bhati, Yiran Zhang, more

American Journal of Transplantation > 20 > 3 > 739 - 751

We conducted an adaptive design single‐center pilot trial between October 2017 and November 2018 to determine the safety and efficacy of ultra‐short‐term perioperative pangenotypic direct acting antiviral (DAA) prophylaxis for deceased hepatitis C virus (HCV)‐nucleic acid test (NAT) positive donors to HCV negative kidney recipients (D+/R−). In Group 1, 10 patients received one dose of SOF/VEL (sofusbuvir/velpatasvir)...

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LOCUSTA MIGRATORIA (9)
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INFONA - science communication portal

Search results for: Le Kang

Revisiting the ‘magic condition’ on the basis of the Takagi–Taupin theory

Novel design of compact quad‐band divider using stepped impedance coupled lines

Biodegradable nanocomposites prepared from poly(butylene adipate terephthalate) and silver nanoparticles for applications as disposable medical equipments

Nitrogen‐Doped Graphene Quantum Dots as Electrochemiluminescence‐Emitting Species for Sensitive Detection of KRAS G12C Mutation via PET‐RAFT**

Finite‐element simulation for crystals with surface undulations based on Takagi–Taupin theory

Planarized quasi‐self‐complementary antenna design with ground‐cooperative radiating for mobile terminal applications

Noninvasive examination of the cardiac properties of insect embryos enabled by optical coherence tomography

A novel non‐invasive identification of genome editing mutants from insect exuviae

Funding of health professional education: China’s 20‐year process and a global comparison

Outcomes of short‐duration antiviral prophylaxis for hepatitis C positive donor kidney transplants

Characterization of protein–protein interactions between rice viruses and vector insects

Epigallocatechin‐3‐gallate induces autophagy‐related apoptosis associated with LC3B II and Beclin expression of bladder cancer cells

Feeding of pea leafminer larvae simultaneously activates jasmonic and salicylic acid pathways in plants to release a terpenoid for indirect defense

FAWMine: An integrated database and analysis platform for fall armyworm genomics

Improv to improve medical student communication

Interactive effect of photoperiod and temperature on the induction and termination of embryonic diapause in the migratory locust

Transformation of glycerate kinase (GLYK) into Metarhizium acridum increases virulence to locust

Impact of belatacept conversion on kidney transplant function, histology, and gene expression ‐ a single‐center study

JumpDetector: An automated monitoring equipment for the locomotion of jumping insects

Ultra‐short duration direct acting antiviral prophylaxis to prevent virus transmission from hepatitis C viremic donors to hepatitis C negative kidney transplant recipients

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