The chromosome-level genome of double-petal phenotype jasmine provides insights into the biosynthesis of floral scent

Jasmine(Jasminum sambac Aiton)is a well-known cultivated plant species for its fragrant flowers used in the perfume industry and cosmetics.However,the genetic basis of its floral scent is largely unknown.In this study,using PacBio,Illumina,10×Genomics and highthroughput chromosome conformation capture(Hi-C)sequencing technologies,a high-quality chromosome-level reference genome for J.sambac was obtained,exploiting a double-petal phenotype cultivar‘Shuangbanmoli’(JSSB).The results showed that the final assembled genome of JSSB is 580.33 Mb in size(contig N50=1.05 Mb;scaffold N50=45.07 Mb)with a total of 39618 predicted protein-coding genes.Our analyses revealed that the JSSB genome has undergone an ancient whole-genome duplication(WGD)event at 91.68 million years ago(Mya).It was estimated that J.sambac diverged from the lineage leading to Olea europaea and Osmanthus fragrans about 28.8 Mya.On the basis of a combination of genomic,transcriptomic and metabolomic analyses,a range of floral scent volatiles and genes were identified involved in the benzenoid/phenylpropanoid and terpenoid biosynthesis pathways.The results provide new insights into the molecular mechanism of its fragrance biosynthesis in jasmine.

Investigation of sodium vanadate as a high-performance aqueous zinc-ion battery cathode

Due to the intrinsic advantages of nontoxicity, low-cost, and abundant resource of metallic zinc, aqueous zinc-ion batteries (ZIBs) have attracted universal interest [1,2]. Tremendous cathode materials have been exploited in aqueous ZIBs, such as manganese-based materials [3-11], Co-based materials [12,13] and vanadium-based materials [14-21].

STTAR: A Traffic- and Thermal-Aware Adaptive Routing for 3D Network-on-Chip Systems

Since the three-dimensional Network on Chip(3D NoC)uses through-silicon via technology to connect the chips,each silicon layer is conducted through heterogeneous thermal,and 3D NoC system suffers from thermal problems.To alleviate the seriousness of the thermal problem,the distribution of data packets usually relies on traffic information or historical temperature information.However,thermal problems in 3D NoC cannot be solved only based on traffic or temperature information.Therefore,we propose a Score-Based Traffic-and Thermal-Aware Adaptive Routing(STTAR)that applies traffic load and temperature information to routing.First,the STTAR dynamically adjusts the input and output buffer lengths of each router with traffic load information to limit routing resources in overheated areas and control the rate of temperature rise.Second,STTAR adopts a scoring strategy based on temperature and the number of free slots in the buffer to avoid data packets being transmitted to high-temperature areas and congested areas and to improve the rationality of selecting routing output nodes.In our experiments,the proposed scoring Score-Based Traffic-and Thermal-Aware Adaptive Routing(STTAR)scheme can increase the throughput by about 14.98%to 47.90%and reduce the delay by about 10.80%to 35.36%compared with the previous works.

Investigation of a Cluster of 2019 Novel Coronavirus Disease (COVID-19) with Possible Transmission During the Incubation Period--Shenyang City, China, 2020

In December of 2019,a novel coronavirus(2019-nCoV)emerged in Wuhan China,which was later named COVID-19(1).It quickly spread and as of February 11,2020,there were 38,800 laboratoryconfirmed cases,16,067 suspected cases,and 1,113 attributable deaths that have affected all provinciallevel administrative divisions(PLADs)of China's Mainland(2).The first confirmed COVID-19 case in Shenyang City,the capital of Liaoning Province,occurred on January 22,2020,with a total of 9 confirmed cases by January 29,2020.Of these cases,4 were clustered in one family.Shenyang CDC immediately launched an investigation to determine routes of transmission,scale of the outbreak,and evidence for epidemic control.

信仰之重——犹太传统剪纸中的七大元素

本文根据耶胡迪特·沙杜尔(Yehudit Shadur)和约瑟夫·沙杜尔(Joseph Shadur)编写的《犹太传统剪纸--艺术与符号的精神世界》Traditional Jewish Papercuts:an inner world of art and symbola一书翻译整理而成。该书于2002年由新英格兰大学出版社出版,是在全世界范围内第一次全面、详细地向大众呈现大量鲜为人知、非常珍贵的犹太传统剪纸。本文将从犹太民族、犹太艺术谈起,构建理解犹太传统剪纸的文化语境,并最终落脚于犹太传统剪纸中最经典的七大元素。