LIVIVO - Search results -

Search results

Result 1 - 10 of total 252054

Search options

Article ; Online: The mechanism of controllable dehydrogenation: CPMD study of M(BH4)x(NH3)y (M = Li, Mg) decomposition.

Wang, Kun / Zhang, Jian-Guo / Lang, Xu-Qiang

Physical chemistry chemical physics : PCCP

2016 Volume 18, Issue 10, Page(s) 7015–7018

Abstract: Amine metallic borohydrides were synthesized as a new series of hydrogen-storage materials. Their dehydrogenation can be controlled if appropriate metal centres are chosen. A typical example is LiBH4NH3 (ALB) and Mg(BH4)2(NH3)2 (AMgB) adopt the same ... ...

Abstract	Amine metallic borohydrides were synthesized as a new series of hydrogen-storage materials. Their dehydrogenation can be controlled if appropriate metal centres are chosen. A typical example is LiBH4NH3 (ALB) and Mg(BH4)2(NH3)2 (AMgB) adopt the same symmetries but show totally different appearances when decomposed. Both ALB and AMgB are relatively new compounds designed as candidates for solid-state hydrogen storage. In this study, we have applied a Car-Parrinello molecular dynamic (CPMD) method to simulate the overall processes of their decomposition to figure out the mechanisms behind the difference in post-decomposition appearances. The polarization of Mg(2+) is almost two times larger than that of Li(+), making the Mg(2+) bond with nitrogen and boron stronger compared to that of Li(+), which improves the appearance of dehydrogenation of AMgB over that of ALB.
Language	English
Publishing date	2016-03-14
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	1476244-4
ISSN	1463-9084 ; 1463-9076
ISSN (online)	1463-9084
ISSN	1463-9076
DOI	10.1039/c5cp06808h
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

Article ; Online: Syntheses, structures, physical properties, and electronic structures of Ba2MLnTe5 (M = Ga and Ln = Sm, Gd, Dy, Er, Y; M = In and Ln = Ce, Nd, Sm, Gd, Dy, Er, Y).

Yin, Wenlong / Wang, Wendong / Bai, Lei / Feng, Kai / Shi, Youguo / Hao, Wenyu / Yao, Jiyong / Wu, Yicheng

Inorganic chemistry

2012 Volume 51, Issue 21, Page(s) 11736–11744

Abstract: The 12 new rare-earth tellurides Ba(2)MLnTe(5) (M = Ga and Ln = Sm, Gd, Dy, Er, Y; M = In and Ln ... Ce, Nd, Sm, Gd, Dy, Er, Y) have been synthesized by solid-state reactions. The two compounds Ba(2 ... and MTe(4) (M = Ga, In) tetrahedra, but the connectivity between the LnTe(6) octahedra and MTe(4 ...

Abstract	The 12 new rare-earth tellurides Ba(2)MLnTe(5) (M = Ga and Ln = Sm, Gd, Dy, Er, Y; M = In and Ln = Ce, Nd, Sm, Gd, Dy, Er, Y) have been synthesized by solid-state reactions. The two compounds Ba(2)GaLnTe(5) (Ln = Sm, Gd) are isostructural and crystallize in the centrosymmetric space group P1, while the other 10 compounds belong to another structure type in the noncentrosymmetric space group Cmc2(1). In both structure types, there are one-dimensional anionic (1)(∞)[MLnTe(5)](4-) chains built from LnTe(6) octahedra and MTe(4) (M = Ga, In) tetrahedra, but the connectivity between the LnTe(6) octahedra and MTe(4) tetrahedra is different for the two structure types. On the basis of the diffuse-reflectance spectra, the band gaps are around 1.1-1.3 eV for these compounds. The Ba(2)MLnTe(5) (M = Ga and Ln = Gd, Dy; M = In and Ln = Gd, Dy, Er) compounds are paramagnetic and obey the Curie-Weiss law, while the magnetic susceptibility of Ba(2)InSmTe(5) deviates from the Curie-Weiss law. In addition, electronic structure calculation on Ba(2)MYTe(5) (M = Ga, In) indicates that they are both direct-gap semiconductors with large nonlinear-optical coefficients.
Language	English
Publishing date	2012-11-05
Publishing country	United States
Document type	Journal Article
ZDB-ID	1484438-2
ISSN	1520-510X ; 0020-1669
ISSN (online)	1520-510X
ISSN	0020-1669
DOI	10.1021/ic301655e
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article: General synthesis of LiLn(MO4)2:Eu3+ (Ln = La, Eu, Gd, Y; M = W, Mo) nanophosphors for near UV-type LEDs

Liu, Ying / Gu, Ying-Ying / Lu, Zhou-Guang / Sun, Rong / Wang, Liping / Wang, Yu / Yu, Shu-Hui

RSC advances. 2013 Dec. 24, v. 4, no. 9

2013

Abstract: ... Gd, Y; M = W, Mo), have been successfully synthesized by a simple Pechini method. The procedure ...

Abstract	A series of Eu3+-doped double tungstate and molybdate red phosphors, LiLn(MO4)2:Eu3+ (Ln = La, Eu, Gd, Y; M = W, Mo), have been successfully synthesized by a simple Pechini method. The procedure involves formation of homogeneous, and transparent, metal–citrate gel precursors using citric acid as a chelating ligand to form metal complexes and ethylene glycol as a cross-linker for polyesterification with the complexes, followed by calcination to promote thermal decomposition of the gel precursors to yield the final LiLn(MO4)2 nanoparticles. The as-synthesized nanoparticles were characterized by thermogravimetric/differential scanning calorimetry (TG-DSC), X-ray diffraction (XRD), scanning electron microscopy (SEM), and photoluminescence (PL) as well as kinetic decay. The results indicate that the obtained LiLn(MO4)2:Eu3+ samples crystallize in the isostructure with tetragonal space group I41/a (no. 88). A room temperature PL spectrum shows that Eu3+-doped LiLn(MO4)2 powders exhibit an excellent luminescent properties under a near ultraviolet excitation wavelength of 395 nm, suitable for near UV type LEDs. By comparing with other counterparts, it is found that LiEu(WO4)2 and LiEu(MoO4)2 display the highest emission intensity. In addition, the phosphor of composition LiY0.95Eu0.05(WO4)2 shows promising application for white light emission with a decay time of 0.585 ms.
Keywords	ambient temperature ; citric acid ; crystallization ; emissions factor ; esterification ; ethylene glycol ; gels ; ligands ; molybdates ; molybdenum ; nanoparticles ; thermal degradation ; thermogravimetry ; wavelengths ; white light
Language	English
Dates of publication	2013-1224
Size	p. 4754-4762.
Publishing place	The Royal Society of Chemistry
Document type	Article
ISSN	2046-2069
DOI	10.1039/c3ra46224b
Database	NAL-Catalogue (AGRICOLA)

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: Reduction of thermal effects in a 2.7-µm Er:Y

Chen, Bin / Du, Tianyi / Wang, Jun / Gao, Qinggang / Zhang, Ning / Zheng, Changsheng / Dong, Jifei / Zhou, Jingjing / Zhang, Huiyun / Zhang, Yuping / Zhao, Yongguang

Optics express

2023 Volume 31, Issue 2, Page(s) 2584–2592

Abstract: ... to the large quantum defect when pumping at ∼ 0.97 µm. Here, we demonstrate that thermal effects in an Er:Y ... Reduction of thermal effects is a challenging aspect for power scaling of 2.7-µm bulk Er-lasers due ...

Abstract	Reduction of thermal effects is a challenging aspect for power scaling of 2.7-µm bulk Er-lasers due to the large quantum defect when pumping at ∼ 0.97 µm. Here, we demonstrate that thermal effects in an Er:Y
Language	English
Publishing date	2023-01-16
Publishing country	United States
Document type	Journal Article
ZDB-ID	1491859-6
ISSN	1094-4087 ; 1094-4087
ISSN (online)	1094-4087
ISSN	1094-4087
DOI	10.1364/OE.480430
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article: Stability and Hydrogen Storage Properties of Mₓ-B₆H₆ Complexes (M = Y–Mo, Ru–Ag, x = 1–2)

Guo, Chen / Wang, Chong

ACS sustainable chemistry & engineering. 2021 July 31, v. 9, no. 32

2021

Abstract: The stability and hydrogen storage ability of Mₓ-B₆H₆ complexes (M = Y–Mo, Ru–Ag, x = 1–2) have ... density, and ambient operating conditions Y complexes are the most promising hydrogen storage materials. Y ... of 5.93 and 8.86 wt %. Their average adsorption energy (ΔEₐᵥₑ) (0.25 eV/H₂) shows that Y compounds ...

Abstract	The stability and hydrogen storage ability of Mₓ-B₆H₆ complexes (M = Y–Mo, Ru–Ag, x = 1–2) have been determined. Due to high stability, reversible average adsorption energy, satisfactory gravimetric density, and ambient operating conditions Y complexes are the most promising hydrogen storage materials. Y-B₆H₆ and Y₂-B₆H₆ bind 5 and 12 H₂ molecules, respectively, with the respective gravimetric densities of 5.93 and 8.86 wt %. Their average adsorption energy (ΔEₐᵥₑ) (0.25 eV/H₂) shows that Y compounds can bind hydrogen molecules by reversible adsorption. Zr and Nb elements can also bind multiple H₂ molecules with high gravimetric capacity and reversible average adsorption energy, however, the storage capacities of their dimerization are not satisfactory. Other transition-metal complexes are not suitable to adsorb hydrogen molecules because of their high binding energies or low gravimetric densities.
Keywords	adsorption ; dimerization ; energy ; green chemistry ; hydrogen
Language	English
Dates of publication	2021-0731
Size	p. 10868-10881.
Publishing place	American Chemical Society
Document type	Article
ISSN	2168-0485
DOI	10.1021/acssuschemeng.1c03363
Database	NAL-Catalogue (AGRICOLA)

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: Effect of Roux-en-Y Gastric Bypass with Different Lengths of Biliopancreatic and Alimentary Limbs for Patients with Type 2 Diabetes Mellitus and a BMI < 35 kg/m

Gao, Xiang / Zhu, Liyong / Wang, Guohui / Li, Weizheng / Song, Zhi / Zhu, Shaihong / Li, Pengzhou

Obesity surgery

2021 Volume 31, Issue 11, Page(s) 4877–4884

Abstract: ... alimentary limb (AL) lengths in Roux-en-Y gastric bypass (RYGB) operations for different populations and BMIs ... kg/m: Patients and methods: Clinical data were collected prospectively and analyzed ... kg/m ...

Abstract	Purpose: There have been no definite conclusions about the biliopancreatic limb (BPL) and alimentary limb (AL) lengths in Roux-en-Y gastric bypass (RYGB) operations for different populations and BMIs. Western scholars have performed many studies on the lengths of the BPL and AL in patients with a BMI ≥ 35 kg/m Patients and methods: Clinical data were collected prospectively and analyzed retrospectively for 87 patients with type 2 diabetes (T2DM) who underwent RYGB with a BPL of 50 cm and an AL of 50 cm (BPL50/AL50) or with a BPL of 100 cm and an AL of 100 cm (BPL100/AL100) and who were followed up for 5 years. Results: The cohort included 42 patients in the BPL50/AL50 group and 45 patients in the BPL100/AL100 group. At 5 years, there were significant differences in BMI, total weight loss (TWL%), glycosylated hemoglobin, and homeostasis model assessment insulin resistance between BPL50/AL50 and BPL100/AL100 (P < 0.05). Diabetes remission rate of the BPL100/AL100 group was significantly higher than that of the BPL50/AL50 group. Diabetes remission at 1 year after surgery correlated with the length limb (BPL + AL), duration of diabetes and TWL%. There was no difference in complications between BPL50/AL50 and BPL100/AL100. Conclusions: RYGB with BPL100/AL100 is a safe and effective treatment for diabetic patients with a BMI < 35 kg/m
MeSH term(s)	Body Mass Index ; China/epidemiology ; Diabetes Mellitus, Type 2/complications ; Diabetes Mellitus, Type 2/surgery ; Gastric Bypass ; Humans ; Obesity, Morbid/surgery ; Retrospective Studies ; Treatment Outcome
Language	English
Publishing date	2021-08-17
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	1070827-3
ISSN	1708-0428 ; 0960-8923
ISSN (online)	1708-0428
ISSN	0960-8923
DOI	10.1007/s11695-021-05658-6
Database	MEDical Literature Analysis and Retrieval System OnLINE

Full text online

Accessible to users with ZB MED library card

In stock of ZB MED Cologne/Königswinter

Zs.A 3381: Show issues

Location:
Je nach Verfügbarkeit (siehe Angabe bei Bestand)
bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
Jg. 1995 - 2021: Lesesall (2.OG)
ab Jg. 2022: Lesesaal (EG)

Order via subito

Details ▾

Article ; Online: Uralsaponins M-Y, antiviral triterpenoid saponins from the roots of Glycyrrhiza uralensis.

Song, Wei / Si, Longlong / Ji, Shuai / Wang, Han / Fang, Xiao-mei / Yu, Li-yan / Li, Ren-yong / Liang, Li-na / Zhou, Demin / Ye, Min

Journal of natural products

2014 Volume 77, Issue 7, Page(s) 1632–1643

Abstract: Thirteen new oleanane-type triterpenoid saponins, uralsaponins M-Y (1-13), and 15 known analogues ...

Abstract	Thirteen new oleanane-type triterpenoid saponins, uralsaponins M-Y (1-13), and 15 known analogues (14-28) were isolated from the roots of Glycyrrhiza uralensis Fisch. The structures of 1-13 were identified on the basis of extensive NMR and MS data analyses. The sugar residues were identified by gas chromatography and ion chromatography coupled with pulsed amperometric detection after hydrolysis. Saponins containing a galacturonic acid (1-3) or xylose (5) residue are reported from Glycyrrhiza species for the first time. Compounds 1, 7, 8, and 24 exhibited good inhibitory activities against the influenza virus A/WSN/33 (H1N1) in MDCK cells with IC50 values of 48.0, 42.7, 39.6, and 49.1 μM, respectively, versus 45.6 μM of the positive control oseltamivir phosphate. In addition, compounds 24 and 28 showed anti-HIV activities with IC50 values of 29.5 and 41.7 μM, respectively.
MeSH term(s)	Animals ; Anti-HIV Agents/chemistry ; Anti-HIV Agents/isolation & purification ; Anti-HIV Agents/pharmacology ; Antiviral Agents/chemistry ; Antiviral Agents/isolation & purification ; Antiviral Agents/pharmacology ; Dogs ; Drugs, Chinese Herbal/chemistry ; Drugs, Chinese Herbal/isolation & purification ; Drugs, Chinese Herbal/pharmacology ; Glycyrrhiza uralensis/chemistry ; Humans ; Influenza A Virus, H1N1 Subtype/drug effects ; Madin Darby Canine Kidney Cells ; Molecular Structure ; Nuclear Magnetic Resonance, Biomolecular ; Oleanolic Acid/analogs & derivatives ; Oleanolic Acid/chemistry ; Oleanolic Acid/isolation & purification ; Oleanolic Acid/pharmacology ; Oseltamivir/pharmacology ; Plant Roots/chemistry ; Saponins/chemistry ; Saponins/isolation & purification ; Saponins/pharmacology
Chemical Substances	Anti-HIV Agents ; Antiviral Agents ; Drugs, Chinese Herbal ; Saponins ; Oseltamivir (20O93L6F9H) ; Oleanolic Acid (6SMK8R7TGJ)
Language	English
Publishing date	2014-07-25
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	304325-3
ISSN	1520-6025 ; 0163-3864
ISSN (online)	1520-6025
ISSN	0163-3864
DOI	10.1021/np500253m
Database	MEDical Literature Analysis and Retrieval System OnLINE

In stock of ZB MED Cologne/Königswinter

Zs.A 1144: Show issues

Location:
Je nach Verfügbarkeit (siehe Angabe bei Bestand)
bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
Jg. 1995 - 2021: Lesesall (1.OG)
ab Jg. 2022: Lesesaal (EG)

Order via subito

Details ▾
- See ZB MED holdings
- Order with fees

Article: Insulin Resistance Remission Following Laparoscopic Roux-en-Y Gastric Bypass and Laparoscopic Sleeve Gastrectomy in Chinese Type 2 Diabetes Mellitus Patients With a Body Mass Index of 27.5-32.5 kg/m

Luo, Ping / Cao, Yaoquan / Li, Pengzhou / Wang, Guohui / Song, Zhi / Li, Weizheng / Su, Zhihong / Zhou, Hui / Yi, Xianhao / Fu, Zhibing / Sun, Xulong / Tang, Haibo / Cui, Beibei / Yu, Qianqian / Zhu, Liyong / Zhu, Shaihong

Frontiers in physiology

2021 Volume 12, Page(s) 772577

Abstract: Background: ...

Abstract	Background:
Language	English
Publishing date	2021-11-08
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2564217-0
ISSN	1664-042X
ISSN	1664-042X
DOI	10.3389/fphys.2021.772577
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Book ; Online: Reply to arXiv:2102.11963, An experimental demonstration of the memristor test, Y. V. Pershin, J. Kim, T. Datta, M. Di Ventra, 23 Feb 2021. Does an ideal memristor truly exist?

Wang, Frank Zhigang

2021

Abstract: After a decade of research, we developed a prototype device and experimentally demonstrated that the direct phi q interaction could be memristive, as predicted by Chua in 1971. With a constant input current to avoid any parasitic inductor effect, our ... ...

Abstract	After a decade of research, we developed a prototype device and experimentally demonstrated that the direct phi q interaction could be memristive, as predicted by Chua in 1971. With a constant input current to avoid any parasitic inductor effect, our device meets three criteria for an ideal memristor: a single valued, nonlinear, continuously differentiable, and strictly monotonically increasing constitutive phi q curve, a pinched v i hysteresis loop, and a charge only dependent resistance. Our work represents a step forward in terms of experimentally verifying the memristive flux charge interaction but we have not reached the final because this prototype still suffers from two serious limitations: 1, a superficial but dominant inductor effect (behind which the above memristive fingerprints hide) due to its inductor-like core structure, and 2. bistability and dynamic sweep of a continuous resistance range. In this article, we also discuss how to make a fully functioning ideal memristor with multiple or an infinite number of stable states and no parasitic inductance, and give a number of suggestions, such as open structure, nanoscale size, magnetic materials with cubic anisotropy (or even isotropy), and sequential switching of the magnetic domains. Additionally, we respond to a recent challenge from arXiv.org that claims that our device is simply an inductor with memory since our device did not pass their designed capacitor-memristor circuit test. Contrary to their conjecture that an ideal memristor may not exist or may be a purely mathematical concept, we remain optimistic that researchers will discover an ideal memristor in nature or make one in the laboratory based on our current work. Comment: 13 pages, 14 figures
Keywords	Condensed Matter - Mesoscale and Nanoscale Physics ; Computer Science - Artificial Intelligence ; I.2.0
Subject code	621
Publishing date	2021-08-10
Publishing country	us
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

Full text online

Full text

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: Retraction RETRACTION of "Methylation of the RASSFIA promoter in breast cancer" by Y. Ji, H.H. Jin, M.D. Wang, W.X. Cao, J.L. Bao - Genet. Mol. Res. 15 (2): gmr.15028261 (2016) - DOI: 10.4238/gmr.15028261.

Ji, Y / Jin, H H / Wang, M D / Cao, W X / Bao, J L

Genetics and molecular research : GMR

2016 Volume 15, Issue 4

Abstract: The retracted article is: Ji Y, Jin HH, Wang MD, Cao WX, et al. (2016). Methylation of the RASSFIA ...

Abstract	The retracted article is: Ji Y, Jin HH, Wang MD, Cao WX, et al. (2016). Methylation of the RASSFIA promoter in breast cancer. Genet. Mol. Res. 15: gmr.15028261. There are significant parts of this article (particularly, in the discussion section) that are copied from "Methylation of HIN-1, RASSF1A, RIL and CDH13 in breast cancer is associated with clinical characteristics, but only RASSF1A methylation is associated with outcome", by Jia Xu, Priya B Shetty, Weiwei Feng, Carol Chenault, Robert C Bast Jr, Jean-Pierre J Issa, Susan G Hilsenbeck and Yinhua Yu, published in BMC Cancer 2012; 12: 243. DOI: 10.1186/1471-2407-12-243. The first paragraphs of both discussions are identical. This is concerning. The abstract and introduction sections have much of their text plagiarized. Overall, there is high plagiarism detected. The GMR editorial staff was alerted and after a thorough investigation, we have strong reason to believe that the peer review process was failure and, after review and contacting the authors, the editors of Genetics and Molecular Research decided to retract the article in accordance with the recommendations of the Committee on Publication Ethics (COPE). The authors and their institutions were advised of this serious breach of ethics.
Language	English
Publishing date	2016-10-07
Publishing country	Brazil
Document type	Journal Article ; Retraction of Publication
ZDB-ID	2114039-X
ISSN	1676-5680 ; 1676-5680
ISSN (online)	1676-5680
ISSN	1676-5680
DOI	10.4238/gmr.150482611
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

To top

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

Inter-library loan at ZB MED

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

Inter-library loan at ZB MED

Full text online

More links

Kategorien

In stock of ZB MED Cologne/Königswinter

Order via subito

More links

Kategorien

In stock of ZB MED Cologne/Königswinter

Order via subito

More links

Kategorien

Order via subito

Full text online

More links

Kategorien

Inter-library loan at ZB MED

More links

Kategorien

Order via subito