Diverse ruthenium nitrides stabilized under pressure: a theoretical prediction

Zhang, Yunkun; Wu, Lailei; Wan, Biao; Lin, Yangzheng; Hu, Qingyang; Zhao, Yan; Gao, Rui; Li, Zhiping; Zhang, Jingwu; Gou, Huiyang

doi:10.1038/srep33506

Cited by 34 publications

(23 citation statements)

References 45 publications

(67 reference statements)

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“…In the current study mean liver stiffness measure was similarly observed to be 5, 8.43, 11.3 and 13.2 kPa, for study subjects with F0-F1, F2, F3 and F4 fibrosis respectively. A significant increase in mean fibroscan reading from F2 to F3 (p value = 0.002), and a marginal association between increase in liver stiffness measure readings from F2 to F4 (p value = 0.09) was noted, which is comparable to the findings of G. Zhang et al [16].…”

Section: Discussionsupporting

confidence: 86%

Поширеність Неалкогольної Жирової Хвороби Печінки У Хворих На Предіабет

Agarwal

Lamba

Sharma

et al. 2021

Mìžnarodnij endokrinologìčnij žurnal

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Background. Diabetes mellitus (DM) is one of the largest global health emergencies. Prediabetes is an early stage in hyperglycemia continuum where individual is at an increased risk for development of DM. NAFLD represents a range of liver disorders characterized by hepatic steatosis or accumulation of fat in the liver cells in the absence of excessive alcohol consumption, viral or drug related etiologies. However, not many studies have been conducted to study the prevalence of non-alcoholic fatty liver disease (NAFLD) in persons with prediabetes. This study is an endeavor in that direction. Materials and methods. This was a cross-sectional observational study. 100 prediabetic patients, fulfilling the criteria as under, were included in the study over a period from November 2017 to March 2019, after informed consent. Investigations carried out on the patients included baseline biochemical parameters like complete hemogram, fasting plasma glucose, liver function tests, kidney function tests, serum electrolytes and specialized investigations like HbA1c, 2-hour-OGTT and serum insulin levels. Results. The study included 38 males and 62 females, with the median age for the study population being 46 years. The mean BMI was found to be 24.29 ± 3.98 kg/m2, and the mean waist circumference was found to be 81.26 ± 8.71 cm. A significant association was found between the level of fatty echotexture on ultrasound and BMI (p = 0.003), and gender (0.05). 30 % population was found to be insulin sensitive, 22 % was found to be depicting early insulin resistance and 48 % had significant insulin resistance. There was a statistically significant correlation between ultrasound and fibroscan findings. A significant statistical correlation was found between HOMA IR and level of fatty echotexture on ultrasound, as well as median liver stiffness on fibroscan. Conclusions. We found a significant correlation between insulin resistance and presence of NAFLD. Also, significant associations were observed between various demographic characteristics and grade of steatosis. There is a need to undertake further studies on a larger scale, to substantiate the observations of this study. This understanding is expected to go a long way in generating awareness and optimizing public health strategies.

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Section: Discussionsupporting

confidence: 86%

Поширеність Неалкогольної Жирової Хвороби Печінки У Хворих На Предіабет

Agarwal

Lamba

Sharma

et al. 2021

Mìžnarodnij endokrinologìčnij žurnal

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“…Ru alloys have been extensively studied at extreme conditions (experimentally and theoretically) to investigate possible ultra-hard materials 11–13 .…”

Section: Introductionmentioning

confidence: 99%

Thermal equation of state of ruthenium characterized by resistively heated diamond anvil cell

Anzellini

Errandonea

Cazorla

et al. 2019

Sci Rep

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The high-pressure and high-temperature structural and chemical stability of ruthenium has been investigated via synchrotron X-ray diffraction using a resistively heated diamond anvil cell. In the present experiment, ruthenium remains stable in the hcp phase up to 150 GPa and 960 K. The thermal equation of state has been determined based upon the data collected following four different isotherms. A quasi-hydrostatic equation of state at ambient temperature has also been characterized up to 150 GPa. The measured equation of state and structural parameters have been compared to the results of ab initio simulations performed with several exchange-correlation functionals. The agreement between theory and experiments is generally quite good. Phonon calculations were also carried out to show that hcp ruthenium is not only structurally but also dynamically stable up to extreme pressures. These calculations also allow the pressure dependence of the Raman-active E2g mode and the silent B1g mode of Ru to be determined.

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“…However, we are unaware about the existence of linear nitrogen chains containing more than six nitrogen atoms, which have been reported hitherto. Interestingly, polytetrazene-type nitrogen chains were predicted to exist in the high-pressure phase with N 2 H stoichiometry, in BeN 4 and in RuN 4 17 , 28 , 63 . In these chains, the ratio of the number of single to double N–N bonds (3:1) is the same as that we found in FeN 4 , however the structures are different.…”

Section: Resultsmentioning

confidence: 99%

Fe-N system at high pressure reveals a compound featuring polymeric nitrogen chains

et al. 2018

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Poly-nitrogen compounds have been considered as potential high energy density materials for a long time due to the large number of energetic N–N or N=N bonds. In most cases high nitrogen content and stability at ambient conditions are mutually exclusive, thereby making the synthesis of such materials challenging. One way to stabilize such compounds is the application of high pressure. Here, through a direct reaction between Fe and N2 in a laser-heated diamond anvil cell, we synthesize three ironnitrogen compounds Fe3N2, FeN2 and FeN4. Their crystal structures are revealed by single-crystal synchrotron X-ray diffraction. Fe3N2, synthesized at 50 GPa, is isostructural to chromium carbide Cr3C2. FeN2 has a marcasite structure type and features covalently bonded dinitrogen units in its crystal structure. FeN4, synthesized at 106 GPa, features polymeric nitrogen chains of [N42−]n units. Based on results of structural studies and theoretical analysis, [N42−]n units in this compound reveal catena-poly[tetraz-1-ene-1,4-diyl] anions.

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Diverse ruthenium nitrides stabilized under pressure: a theoretical prediction

Cited by 34 publications

References 45 publications

Поширеність Неалкогольної Жирової Хвороби Печінки У Хворих На Предіабет

Поширеність Неалкогольної Жирової Хвороби Печінки У Хворих На Предіабет

Thermal equation of state of ruthenium characterized by resistively heated diamond anvil cell

Fe-N system at high pressure reveals a compound featuring polymeric nitrogen chains

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