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谷歌遭遇最大反断挫败面临拆分风险

商业周刊（中文版） 2024年第13期 16-18页

作者： leah Nylen 程玺(译) 不详

这是20余年来首宗由美国联邦政府起诉科技公司的反垄断案件.8月5日,美国法官裁定Alphabet Inc.旗下的谷歌公司在搜索市场构成非法垄断,这是谷歌遭遇的最大反垄断挫败。这标志着美国司法部和州检察长的重大胜利,而成立25载的谷歌也将因... 详细信息

这是20余年来首宗由美国联邦政府起诉科技公司的反垄断案件.8月5日,美国法官裁定Alphabet Inc.旗下的谷歌公司在搜索市场构成非法垄断,这是谷歌遭遇的最大反垄断挫败。这标志着美国司法部和州检察长的重大胜利,而成立25载的谷歌也将因此面临拆分风险。

关键词：美国司法部反垄断谷歌公司美国联邦政府拆分检察长美国法官挫败

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沙漠彩虹丝兰谷住宅

室内设计与装修 2024年第1期 18-23页

作者： [美国]leah Ring 秋落(编译) 无不详 Another Human

经过对丝兰谷多年的考察,室内设计公司Another Human的创始人leah Ring决定在此购买一处房产,用来实践她设计敏感性的极端版本。这处房产由4栋年久失修的小屋组成,为Ring提供了一块空白的创作空间。Ring只保留了建筑的外壳,发挥她的想... 详细信息

经过对丝兰谷多年的考察,室内设计公司Another Human的创始人leah Ring决定在此购买一处房产,用来实践她设计敏感性的极端版本。这处房产由4栋年久失修的小屋组成,为Ring提供了一块空白的创作空间。Ring只保留了建筑的外壳,发挥她的想象力和创造力,将大胆的色彩、活泼的造型与复古的产品相结合,体现一种趣味性。这处房产既是她的第二个家,也是她室内设计和家具设计的展示场所。

关键词：创作空间丝兰住宅房产 Ring 趣味性敏感性

Viability and hatchability of brine shrimp Artemia franciscana cysts after passing through the digestive system of eared grebes Podiceps nigricollis

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Journal of Oceanology and Limnology 2023年第4期41卷 1300-1306页

作者： Michael R.CONOVER Mark E.BELL leah M.DELAHOUSSAYE Department of Wildland Resources and Ecology Center LoganUT 84322-5230USA

Brine shrimp Artemia franciscana provide food for many migrating and staging birds that spend summer and fall on Great Salt Lake,Utah,*** produce live young and cysts(hard-walled eggs);these cysts are commercially harvested on Great Salt Lake and support a large industry in *** is unclear the impact that millions of hungry birds have on the Artemia population in the *** help assess that,this study evaluated cyst viability(percentage of cysts that contain an embryo)and hatchability(percent of cysts that hatch)from cysts that had passed through the digestive tract of eared grebes Podiceps nigricollis and cysts obtained directly from Great Salt Lake at the same site where each grebe was *** was significantly higher for cysts collected from the water column(19%)than from the stomach(0.3%)or intestines(3%)of eared *** also was significantly different for cysts collected from the water column(29%),stomach(0.7%),and intestines(5%).These results indicate that eared grebes nutritionally benefit from eating cysts and that they may be an important food source for grebes in late fall after the adult population of Artemia dies off due to the water becoming too ***,enough cysts survive their passage through the digestive system that grebes can vector hatchable cysts to other waterbodies.

关键词： Artemia dispersal eared grebes hatchability invasive species Great Salt Lake salty lakes viability

Encapsulated peracetic acid as a valid broad‑spectrum antimicrobial alternative,leading to beneficial microbiota compositional changes and enhanced performance in broiler chickens

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畜牧与生物技术杂志:英文版 2023年第5期14卷 2128-2142页

作者： Salvatore Galgano leah Conway Nikki Dalby Adrian Fellows Jos G.MHoudijk Monogastric Science Research Centre Scotland’s Rural CollegeWest Mains RoadEdinburgh EH93JGScotlandUK Aga2tech Ltd HalifaxUK Centre for Innovation Excellence in Livestock YorkUK

Background Antimicrobial alternatives are urgently needed,including for poultry production *** this study,we tested the potential broad-range antimicrobial alternative peracetic acid,delivered in feed via the hydrolysis of encapsulated precursors through a 28-day study using 375 Ross 308 broiler *** tested two peracetic acid concentrations,30 and 80 mg/kg on birds housed on re-used litter,and we evaluated the impact of both levels on gut microbial communities,bacterial concentration,antimicrobial resistance genes relative abundance and growth performance when compared to control birds housed on either clean or re-used *** Body weight gain and feed conversion ratio improved in peracetic acid fed *** d 28,birds given 30 mg/kg of peracetic acid had a decreased Firmicutes and an increased Proteobacteria abundance in the jejunum,accompanied by an increase in Bacillus,Flavonifractor and Rombustia in the caeca,and a decreased abundance of tetracycline resistance *** given 80 mg/kg of peracetic acid had greater caecal abundance of macrolides lincosamides and streptogramins resistance *** performance on clean litter was reduced compared to reused litter,which concurred with increased caecal abundance of Blautia,decreased caecal abundance of Escherichia/Shigella,Anaerostipes and Jeotgalicoccus,and greater gene abundance of vancomycin,tetracycline,and macrolides resistance *** Peracetic acid could be used as a safe broad-spectrum antimicrobial alternative in *** precursors were able to reduce the bacterial concentration in the jejunum whilst promoting the proliferation of probiotic genera in the caeca,especially at the low peracetic acid concentrations tested,and improve growth ***,our findings offer further insights on potential benefits of rearing birds on re-used litter,suggesting that the latter could be associated with better performance and reduced antimicrobial resistance

关键词： Antimicrobial alternative Antimicrobial resistance Broiler chicken Microbiota Peracetic acid Performance 16S rRNA gene

Retinal regeneration requires dynamic Notch signaling

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Neural Regeneration Research 2022年第6期17卷 1199-1209页

作者： leah J.Campbell Jaclyn L.Levendusky Shannon A.Steines David R.Hyde Department of Biological Sciences Center for Zebrafish ResearchCenter for Stem Cells and Regenerative MedicineUniversity of Notre DameNotre DameINUSA

Retinal damage in the adult zebrafish induces Müller glia reprogramming to produce neuronal progenitor cells that proliferate and differentiate into retinal *** signaling,which is a fundamental mechanism known to drive cell-cell communication,is required to maintain Müller glia in a quiescent state in the undamaged retina,and repression of Notch signaling is necessary for Müller glia to reenter the cell *** dynamic regulation of Notch signaling following retinal damage also directs proliferation and neurogenesis of the Müller glia-derived progenitor cells in a robust regeneration *** contrast,mammalian Müller glia respond to retinal damage by entering a prolonged gliotic state that leads to additional neuronal death and permanent vision *** the dynamic regulation of Notch signaling in the zebrafish retina may aid efforts to stimulate Müller glia reprogramming for regeneration of the diseased human *** findings identified DeltaB and Notch3 as the ligand-receptor pair that serves as the principal regulators of zebrafish Müller glia *** addition,multi-omics datasets and functional studies indicate that additional Notch receptors,ligands,and target genes regulate cell proliferation and neurogenesis during the regeneration time ***,our understanding of Notch signaling during retinal regeneration is *** fully appreciate the complex regulation of Notch signaling that is required for successful retinal regeneration,investigation of additional aspects of the pathway,such as post-translational modification of the receptors,ligand endocytosis,and interactions with other fundamental pathways is *** we review various modes of Notch signaling regulation in the context of the vertebrate retina to put recent research in perspective and to identify open areas of inquiry.

关键词： differentiation gliosis Müller glia neuronal progenitor cell Notch signaling proliferation quiescence retinal development retinal regeneration zebrafish

Lipidomic insights into the response of Arabidopsis sepals to mild heat

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aBIOTECH 2023年第3期4卷 224-237页

作者： Zican Chen Weronika Jasinska Muhammad Ashraf leah Rosental Jung Hong Dabing Zhang Yariv Brotman Jianxin Shi Joint International Research Laboratory of Metabolic and Developmental Sciences State Key Laboratory of Hybrid RiceSchool of Life Sciences and BiotechnologyShanghai Jiao Tong UniversityShanghai 200240China Department of Life Sciences Ben Gurion University of the NegevBeersheva 84105Israel School of Agriculture Food and WineUniversity of AdelaideUrrbraeSA 5064Australia Yazhou Bay Institute of Deepsea Sci-Tech Shanghai Jiao Tong UniversityShanghai 200240China

Arabidopsis sepals coordinate flower opening in the morning as ambient temperature rises;however,the underlying molecular mechanisms are poorly understood. Mutation of one heat shock proteinencoding gene, HSP70-16, impaired sepal heat stress responses (HSR), disrupting lipid metabolism,especially sepal cuticular lipids, leading to abnormal flower opening. To further explore, to what extent,lipids play roles in this process, in this study, we compared lipidomic changes in sepals of hsp70-16 andvdac3 (mutant of a voltage-dependent anion channel, VDAC3, an HSP70-16 interactor) grown underboth normal (22 C) and mild heat stress (27 C, mild HS) temperatures. Under normal temperature,neither hsp70-16 nor vdac3 sepals showed significant changes in total lipids;however, vdac3 but nothsp70-16 sepals exhibited significant reductions in the ratios of all detected 11 lipid classes, except themonogalactosyldiacylglycerols (MGDGs). Under mild HS temperature, hsp70-16 but not vdac3 sepalsshowed dramatic reduction in total lipids. In addition, vdac3 sepals exhibited a significant accumulationof plastidic lipids, especially sulfoquinovosyldiacylglycerols (SQDGs) and phosphatidylglycerols (PGs),whereas hsp70-16 sepals had a significant accumulation of triacylglycerols (TAGs) and simultaneousdramatic reductions in SQDGs and phospholipids (PLs), such as phosphatidylcholines (PCs), phosphatidylethanolamines (PEs), and phosphatidylserines (PSs). These findings revealed that the impact ofmild HS on sepal lipidome is influenced by genetic factors, and further, that HSP70-16 and VDAC3differently affect sepal lipidomic responses to mild HS. Our studies provide a lipidomic insight intofunctions of HSP and VDAC proteins in the plant’s HSR, in the context of floral development.

关键词： Floral development Heat shock protein Lipidomic profiling Stress response Voltage-dependent anion channel protein

A GPU-Accelerated Mixed-Precision WENO Method for Extremal Black Hole and Gravitational Wave Physics Computations

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Communications on Applied Mathematics and Computation 2023年第1期5卷 97-115页

作者： Scott E.Field Sigal Gottlieb Zachary J.Grant leah F.Isherwood Gaurav Khanna University of Massachusetts Dartmouth North DartmouthMA 02747USA Department of Computational and Applied Mathematics Oak Ridge National LaboratoryOak RidgeTN 37830USA University of Rhode Island KingstonRI 02881USA

We develop and use a novel mixed-precision weighted essentially non-oscillatory(WENO)method for solving the Teukolsky equation,which arises when modeling perturbations of Kerr black *** show that WENO methods outperform higher-order finite-difference methods,standard in the discretization of the Teukolsky equation,due to the need to add dissipation for stability purposes in the *** particular,as the WENO scheme uses no additional dissipation,it is well suited for scenarios requiring long-time evolution such as the study of price tails and gravitational wave emission from extreme mass ratio *** the mixed-precision approach,the expensive computation of the WENO weights is performed in reduced floating-point precision that results in a significant speedup factor of≈*** addition,we use state-of-the-art Nvidia general-purpose graphics processing units and cluster parallelism to further accelerate the WENO *** optimized WENO solver can be used to quickly generate accurate results of significance in the field of black hole and gravitational wave *** apply our solver to study the behavior of the Aretakis charge—a conserved quantity,that if detected by a gravitational wave observatory like LIGO/Virgo would prove the existence of extremal black holes.

关键词： Numerical methods-Finite differencing Hyperbolic Partial differential equations Black holesblack holes WENO

Ketamine use disorder:preclinical,clinical,and neuroimaging evidence to support proposed mechanisms of actions

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Intelligent Medicine 2022年第2期2卷 61-68页

作者： leah Vines Diana Sotelo Allison Johnson Evan Dennis Peter Manza Nora D.Volkow Gene-Jack Wang Laboratory of Neuroimaging National Institute on Alcohol Abuse and AlcoholismNational Institutes of Health10 Center DrRm B2L124BethesdaMarylandUnited States

Ketamine,a noncompetitive N-methyl-D-aspartate(NMDA)receptor antagonist,has been exclusively used as an anesthetic in medicine and has led to new insights into the pathophysiology of neuropsychiatric *** studies have shown that low subanesthetic doses of ketamine produce antidepressant effects for individuals with ***,its use as a treatment for psychiatric disorders has been limited due to its reinforcing effects and high potential for diversion and *** studies have focused on understanding the molecular mechanisms underlying ketamine’s antidepressant effects,but a precise mechanism had yet to be *** we review different hypotheses for ketamine’s mechanism of action including the direct inhibition and disinhibition of NMDA receptors,aminomethylphosphonic acid receptors(AMPAR)activation,and heightened activation of monoaminergic *** proposed mechanisms are not mutually exclusive,and their combined influence may exert the observed structural and functional neural *** term use of ketamine induces brain structural,functional impairments,and neurodevelopmental effects in both rodents and *** misuse has increased rapidly in the past 20 years and is one of the most common addictive drugs used in *** proposed mechanisms of action and supporting neuroimaging data allow for the development of tools to identify‘biotypes’of ketamine use disorder(KUD)using machine learning approaches,which could inform intervention and treatment.

关键词： Ketamine Neuroimaging N-methyl-D-aspartate Dopamine Serotonin Glutamatergic Gamma-aminobutyric acid

Methyl-CpG binding proteins in the nervous system

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Cell Research 2005年第4期15卷 255-261页

作者： leah HUTNICK CA 90095-7088 University of California at Los Angeles Department of Human Genetics and Interdepartmental Program of Neuroscience David Geffen School of Medicine USA P.O. Box957088

Classical methyl-CpG binding proteins contain the conserved DNA binding motif methyl-cytosine binding domain(MBD), which preferentially binds to methylated CpG dinucleotides. These proteins serve as transcriptional repressors,mediating gene silencing via DNA cytosine methylation. Mutations in methyl-CpG binding protein 2 (MeCP2) have beenlinked to the human mental retardation disorder Rett syndrome, suggesting an important role for methyl-CpG bindingproteins in brain development and function. This mini-review summarizes the recent advances in studying the diversefunctions of MeCP2 as a prototype for other methyl-CpG binding proteins in the development and function of thevertebrate nervous system.

关键词： MeCP2 MBD proteins DNA methylation neuronal differentiation chromatin remodeling gene silencing histone modification.