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Superconductivity in La and Y hydrides: Remaining questions to experiment and theory

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Matter and Radiation at Extremes 2020年第2期5卷 62-72页

作者： Viktor Struzhkin Bing Li Cheng Ji Xiao-Jia Chen Vitali Prakapenka eran Greenberg Ivan Troyan Alexander Gavriliuk Ho-kwang Mao Center for High Pressure Science and Technology Advanced Research ShanghaiChina Geophysical Laboratory Carnegie Institution of WashingtonWashingtonDC 20015USA Center for Advanced Radiation Sources The University of Chicago5640 South Ellis AvenueChicagoIllinois 60637USA Federal Scientific Research Center Crystallography and Photonics Russian Academy of Sciences59 Leninskii Pr-tMoscow 119333Russia Institute for Nuclear Research Russian Academy of SciencesMoscowTroitsk 108840Russia

Recent reports of the superconductivity in hydrides of two different families(covalent lattice,as in SH3 and clathrate-type H-cages containing La and Y atoms,as in LaH10 and YH6)have revealed new families of high-Tc materials with Tc’s near room temperature *** findings confirm earlier expectations that hydrides may have very high Tc’s due to the fact that light H atoms have very high vibrational frequencies,leading to high Tc values within the conventional Bardeen–Cooper–Schrieffer phonon mechanism of ***,as is pointed out by Ashcroft,it is important to have the metallic hydrogen“alloyed”with the elements added to *** concept of a metallic alloy containing a high concentration of metal-like hydrogen atoms has been instrumental in finding new high-Tc *** new superhydride“roomtemperature”superconductors are stabilized only at very high pressures above 100 GPa,making the experimental search for their superconducting properties very *** will review the current experimental and theoretical results for LaH10−x and YH6−x superhydrides.

关键词： hydrides alloy metallic

Relationship between Oral Glucose Tolerance Test Characteristics and Adverse Pregnancy Outcomes among Women with Gestational Diabetes Mellitus

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Chinese Medical Journal 2017年第9期130卷 1012-1018页

作者： Hui Feng Wei-Wei Zhu Hui-Xia Yang Yu-Mei Wei Chen Wang Ri-Na Su Moshe Hod eran Hadar Department of Obstetrics and Gynecology Peking University First Hospital Beijing 100034 China Exchange and Cooperation Division National Institute of Hospital Administration Beijing 100191 China Helen Schneider Hospital for Women Rabin Medical Center Sackler Faculty of Medicine TeI-Aviv University Petah-Tiqva TeI-Aviv 6997801 Israel

Background： Hyperglycemia is associated with adverse pregnancy outcomes. However, the relationships between them remain ambiguous. This study aimed to analyze the effect of different oral glucose tolerance test （OGTT） results on adverse perinatal outcomes. Methods： This retrospective cohort study included data from 15 hospitals in Beijing from June 20, 2013 to November 30, 2013. Women with gestational diabetes mellitus （GDM） were categorized according to the number and distribution of abnormal OGTT values, and the characteristics of adverse pregnancy outcomes were evaluated. Chi-square test and logistic regression analysis were used to determine the associations. Results： in total, 14,741 pregnant women were included in the study population, 2927 （19.86%） of whom had G DM. As the number of hyperglycemic values in the OGTT increased, the risk of cesarean delivery, preterm births, large-for-gestational age （LGA）, macrosomia, and neonatal complications significantly increased. Fasting hyperglycemia bad clear associations with macrosomia （odds ratios [ORs]：1.84, 95% confidence intervals [CIs]： 1.39-2.42, P 〈 0.001）, L（SA （OR： 1.70, 95% CI： 1.29-2.25. P 〈 0.001）, and cesarean delivery （OR： 1.33, 95% CI： 1.15-1.55, P 〈 0.001）. The associations were stronger as tasting glucose increased. GDM diagnosed by hyperglycemia at OGTT-2 h was more likely to lead to preterm birth （OR： 1.50, 95% Cl： 1. 11-2.03, P 〈 0.01）. Conclusions： Various characteristics of OGTTs are associated with different adverse outcomes. A careful reconsideration ofGDM wiih hierarchical and individualized management according to OGTT characteristics is needed.

关键词： Cesarean Delivery Gestational Diabetes Mellitus Glucose Tolerance Test Large-for-gestational Age Macrosomia Pregnancy Outcomes Preterm Births

Liver function tests and metabolic-associated fatty liver disease:Changes in upper normal limits,does it really matter?

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World Journal of Hepatology 2021年第12期13卷 2104-2112页

作者： Roberta Forlano Benjamin H Mullish Ameet Dhar Robert D goldin Mark Thursz Pinelopi Manousou Liver Unit/Department of Metabolism Digestion and ReproductionFaculty of MedicineImperial College LondonLondon W21NYUnited Kingdom Centre for Pathology Department of MedicineImperial College LondonLondon W21NYUnited Kingdom

BACKGROUND Metabolic-associated fatty liver disease(MAFLD)is the commonest cause of abnormal liver function tests(LFTs).Current upper normal of limit(UNL)of LFTs was derived from a“healthy”population,where undiagnosed MAFLD and viral hepatitis might be *** To evaluated potential implications of changes in UNL of alanine aminotransferase(ALT)in *** We retrospectively assessed consecutive first referrals with a diagnosis of MAFLD from 2010 to *** conventional UNL of ALT was 45 IU/L for men and 34 IU/L for women,while a low UNL of ALT was 30 IU/L for men and 19 IU/L for *** UNL of aspartate aminotransferase(AST)was 40 IU/*** Total 436 patients were enrolled;of these,288 underwent liver *** a lower UNL reduced the percentage of those with significant disease despite normal ALT;specifically,patients with advanced fibrosis(F≥F3)or definite“metabolic-associated steato-hepatitis(MASH)”(NAS≥5)within normal ALT decreased from 10%to 1%and from 28%to 4%***,the proportion of those with elevated ALT and no evidence of advanced fibrosis or“definite MASH”increased from 39%to 47%and from 3%to 19%.Overall,LFTs performed poorly in distinguishing“definite MASH”from simple steatosis(receiver operating characteristic areas under the curves 0.59 for ALT and 0.55 for AST).CONCLUSION Liver function tests might both under-and overestimate MASH-related liver *** the UNL might not be beneficial and imply an increase in healthcare *** stratification in MAFLD should rely on a combination of risk factors,not on LFTs alone.

关键词： Metabolic-associated fatty liver disease Liver function tests Alanine aminotransferase Fibrosis Stiffness

Interobserver and intraobserver agreement for Letournel acetabular fracture classification system using 3-dimensional printed solid models

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World Journal of Orthopedics 2021年第2期12卷 82-93页

作者： eran Keltz Doron Keshet Eli Peled Yoav Zvi Doron Norman Yaniv Keren Division of Orthopedic Surgery Rambam Health Care CampusHaifa 3525408Israel Ruth Rappaport Faculty of Medicine Technion Israel Institute of TechnologyHaifa 3200003Israel Department of Orthopaedic Surgery Montefiore Medical CenterNew YorkNY 10461United States

BACKGROUND Acetabular fractures pose diagnostic and surgical *** are classified using the Judet-Letournel system,which is based solely on ***,computed tomography(CT)imaging is now more widely utilized in diagnosing these *** emergence of 3-dimensional(3-D)printing technology in varying orthopedic fields has provided surgeons a solid model that improves their spatial understanding of complex fractures and ability to plan *** To evaluate the reliability of the Judet-Letournel classification system of acetabular fractures,when using either CT imaging or 3-D printed *** Seven patients with acetabular fractures underwent pelvic CT imaging,which was then used to create solid,3-D printed *** orthopaedic trauma surgeons responded to questionnaires regarding fracture classification and preferred surgical *** same questionnaire was completed using only CT imaging,and two weeks later,using only 3-D printed *** inter-and intra-observer agreement rates were then *** Inter-observer agreement rates based on CT imaging or 3-D printed models were moderate for fracture classification:κ=0.44,κ=0.55,respectively(P<0.001)and fair for preferred surgical approach:κ=0.34,κ=0.29,respectively(P<0.005).Intra-observer agreement rates for fracture classification and preferred surgical approach comparing CT imaging or 3-D printed models were moderate:κ=0.48,κ=0.41,*** significant difference in intra-observer agreement was detected when comparing orthopedic pelvic specialists to general orthopedic *** The Judet-Letournel classification demonstrated only moderate rates of *** use of 3-D printed models increased the inter-observer agreement rates with respect to fracture classification,but decreased it with respect to the preferred surgical *** study highlights the role of 3-D printed models in acetabular fractures by improving spatial understandin

关键词： Acetabulum Pelvic trauma Acetabular fracture Three-dimensional printing Three-dimensional reconstruction Judet-Letournel

Hepatic steatosis and fibrosis: Non-invasive assessment

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World Journal of Gastroenterology 2016年第45期22卷 9880-9897页

作者： Rustam N Karanjia Mary ME Crossey I Jane Cox Haddy KS Fye Ramou Njie Robert D goldin Simon D Taylor-Robinson Liver Unit Division of Digestive Health Department of Surgery and Cancer Imperial College London St Mary’s Campus London W2 1NY United Kingdom Institute of Hepatology London Foundation for Liver Research 111 Coldharbour Lane London SE5 9NT United Kingdom Faculty of Life Sciences and Medicine King’s College London London SE5 9NT United Kingdom MRC Gambia Atlantic Road Fajara The Gambia

Chronic liver disease is a major cause of morbidity and mortality worldwide and usually develops over many years, as a result of chronic inflammation and scarring, resulting in end-stage liver disease and its complications. The progression of disease is characterised by ongoing inflammation and consequent fibrosis, although hepatic steatosis is increasingly being recognised as an important pathological feature of disease, rather than being simply an innocent bystander. However, the current gold standard method of quantifying and staging liver disease, histological analysis by liver biopsy, has several limitations and can have associated morbidity and even mortality. Therefore, there is a clear need for safe and noninvasive assessment modalities to determine hepatic steatosis, inflammation and fibrosis. This review covers key mechanisms and the importance of fibrosis and steatosis in the progression of liver disease. We address non-invasive imaging and blood biomarker assessments that can be used as an alternative to information gained on liver biopsy.

关键词：肝的脂肪变性纤维变性非侵略的评价血 biomarker 超声

Chromatin in embryonic stem cell neuronal diiferentiation

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Chromatin in embryonic stem cell neuronal diiferentiation

Five years of fecal microbiota transplantation-an update of the Israeli experience

第十五届国际药理学大会

作者： eran Meshorer National Cancer Institute National Institutes of Health Bethesda MD 20892 USA

＜正＞ Embryonic stem （ES） cells, derived from the inner cell mass of the blastocyst. are unique in their ability to both self-renew and to differentiate into the three germ layers. Here we show global changes in nuclear architecture and chromatin structure during ES cell neuronal differentiation. A hyperdynamic pool of chromatin proteins is loosely bound in ES cells and become tightly associated with chromatin in neuronal progenitor cells （NPCs）. The levels of activity-associated histone marks, such as acetylated histones H3 and H4. are reduced during neuronal differentiation, while H3-triMeK9 is increased. Moreover, genomic tiling arrays, uridine incorporation assays and RT-PCR experiments revealed higher global transcriptional activity in ES cells compared with ES-derived NPCs and neurons. Taken together, these results suggest that chromatin is a fundamental regulator of neuronal commitment and that gene silencing by chromatin condensation and heterochromatin formation promotes neuronal differentiation.

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World Journal of Gastroenterology 2018年第47期24卷 5403-5414页

作者： Sharon A Greenberg Ilan Youngster Nathaniel A Cohen Dan M Livovsky Jacob Strahilevitz eran Israeli Ehud Melzer Kalman Paz Naomi Fliss-Isakov Nitsan Maharshak Department of Gastroenterology and Liver Diseases Tel Aviv Sourasky Medical Centeraffiliated with the Sackler Faculty of MedicineTel Aviv UniversityTel Aviv 6423906Israel Bacteriotherapy Clinic Tel Aviv Sourasky Medical Centeraffiliated with the Sackler Faculty of MedicineTel Aviv UniversityTel Aviv 6423906Israel Assaf Harofe Medical Center Zerifin 70300Israel Digestive Diseases Institute Shaare Zedek Medical CenterJerusalem 91031Israel Department of Clinical Microbiology and Infectious Diseases Hadassah-Hebrew UniversityJerusalem 91120Israel Department of Gastroenterology and Liver Diseases Hadassah-Hebrew UniversityJerusalem 91120Israel Gastrointestinal and Liver Diseases Institute Kaplan Medical CenterRehovot 76100Israel

AIM To evaluate and describe the efficacy of fecal microbiota transplantation(FMT) for Clostridium difficile infection(CDI) in a national Israeli *** All patients who received FMT for recurrent(recurrence within 8 wk of the previous treatment) or refractory CDI from 2013 through 2017 in all the five medical centers in Israel currently performing FMT were included. Stool donors were screened according to the Israeli Ministry of Health guidelines. Clinical and laboratory data of patients were collected from patients' medical files, and they included indications for FMT, risk factors for CDI and disease severity. Primary outcome was FMT success(at least 2 mo free of CDI-related diarrhea post-FMT). Secondary outcomes included initial response to FMT(cessation of diarrhea within 7 d) and recurrence at 6 *** There were 111 FMTs for CDI, with a median age of 70 years [interquartile range(IQR): 53-82], and 42%(47) males. Fifty patients(45%) were treated via the lower gastrointestinal(LGI, represented only by colonoscopy) route, 37(33%) via capsules, and 24(22%) via the upper gastrointestinal(UGI) route. The overall success rate was 87.4%(97 patients), with no significant difference between routes of administration(P = 0.338). In the univariant analysis, FMT success correlated with milder disease(P = 0.01), ambulatory setting(P < 0.05) and lower Charlson comorbidity score(P < 0.05). In the multivariant analysis, only severe CDI [odd ratio(OR) = 0.14, P < 0.05] and inpatient FMT(OR = 0.19, P < 0.05) were each independently inversely related to FMT success. There were 35(32%) patients younger than 60 years of age, and 14(40%) of them had a background of inflammatory bowel *** FMT is a safe and effective treatment for CDI, with capsules emerging as a successful and well-tolerated route. Severe CDI is less likely to respond to FMT.

关键词： Clostridium difficile infection Capsules Israel Fecal microbiota transplantation

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一种替代气管插管的方法——联合导气管

国外医学（麻醉学与复苏分册） 1993年第3期14卷 155-156页

作者： Frass M goldin M 卿恩明

心肺复苏的第一步是建立通畅的呼吸道,气管内插管是最好的方法,但有时难以成功.联合导气管则可克服这些缺点.多项研究已证明这种设计是有效的.

关键词：复苏插管法气管内联合导气管

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迭加前和迭加后偏移在理论上的对比

迭加前和迭加后偏移在理论上的对比