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Synthesis of energetic coordination polymers based on 4-nitropyrazole by solid-melt crystallization in non-ionization condition

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Defence Technology（防务技术） 2023年第10期28卷 13-22页

作者： Ting-wei Wang Shu Bu Kun Wang Lu zhang Zhen-xin Yi Shun-guan Zhu jian-guo zhang State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing100081China School of Chemical Engineering Nanjing University of Science and Technology200 Xiaolingwei StreetXuanwuNanjing210094China Department of Chemistry Laboratory of Structure and Functional Regulation of Hybrid MaterialsAnhui UniversityMinistry of EducationHefei230601China

Based on the theory of crystallization,a solvent-free solid-liquid phase crystallization method called solid-melt crystallization was designed to prepare energetic coordination *** target compounds[Cu(NPyz)_(4)NO_(3)]·NO_(3)(ECPs-1)and Cu(NPyz)_(4)(ClO_(4))_(2)(ECCs-2)were prepared through programmed heating and cooling by using 4-nitropyrazole(NPyz),(Cu(NO_(3))_(2)·5H_(2)O and Cu(ClO_(4))_(2)·5H_(2)O) as raw *** addition,crystallization pre-experiments and annealing experiments also verified the feasibility of the *** structures were confirmed by IR,elemental analysis,single-crystal X-ray diffraction and powder X-ray *** physicochemical properties and sensitivity test results showed that ECCs-2 has better thermal stability(T_(d)=221℃),while ECPs-1 is less sensitive to mechanical stimuli(IS=12 J,FS=240 N).Calculations based on EXPLO5 and the Kamlet-Jacobs equation showed that ECCs-2 has more considerable detonation performance(P=25.2 GPa,D=7.5 km/s).In comparison,the more intuitive results from the HN test,flame test,thermal resistance test and lead plate explosion test revealed that ECCs-2 has an“acceptable”detonation *** laser detonation test also showed that ECCs-2 is a promising excellent laser detonation material(E=408 mJ,P=24 W,τ=17 ms).

关键词： 4-Amino-1,2,5-oxadiazole-3-carbohydrazide Crystallization Coordination polymers Laser Primary explosives

Recent advances on the nitrogen-rich 1,2,4-oxadiazole-azoles-based energetic materials

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Defence Technology（防务技术） 2022年第3期18卷 344-367页

作者： Wen-Li Cao Qamar-un-Nisa Tariq Zhi-Min Li Jun-Qing Yang jian-guo zhang State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing100081 PR China CAS Key Laboratory of Energy Regulation Materials Shanghai200032China

This review covers recent advances in the synthesis and energetic performance of nitrogen-rich 1,2,4-oxadiazole-azoles-based energetic *** materials comprise of 1,2,4-oxadiazole subunit as a key structural motif linked to different nitrogen-rich or nitrogen-oxygen azoles:tetrazole,furazan,furoxan,1,3,4-oxadiazole,pyrazole,and *** attention is devoted to the introduction of various energetic groups including nitro,nitramino,azo,azoxy,dinitromethyl,trinitroethyl moieties,and their *** physicochemical and available performance parameters including density,decomposition temperature,heat of formation,detonation pressure,detonation velocity,impact sensitivity,and friction sensitivity of typical energetic compounds are also provided and ***,it was obtained that several screened compounds exhibit superior detonation properties and outstanding insensitivities,which can be classified as a new family of high-performance energetic ***,1,2,4-oxadiazole-azoles-based energetic materials still have many thorough works to further exploited and studied,expecting to get very promising insensitive high explosives for practical application and industrialization.

关键词： 1,2,4-Oxadiazole-azoles Triazole Tetrazole Furazan Energetic materials Furoxan

Recent advances in the synthesis and energetic properties of potassium-based potential green primary explosives

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Defence Technology（防务技术） 2022年第11期18卷 1945-1959页

作者： Qamar-un-Nisa Tariq Saira Manzoor Maher-un-Nisa Tariq Wen-Li Cao jian-guo zhang State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing100081China Department of Chemistry University of OkaraOkara56300Pakistan

Primary explosives are utilized as a reliable initiator for secondary explosives in an extensive range of military and civilian operations. Heavy-metal-based primary explosives are moderate performing, more sensitive, and environmentally hazardous, posing a direct and indirect threat to health and ***, heavy-metal-based primaries have been replaced by environment-friendly metal-based primary explosives, such as potassium complexes. This review presents not only a summary of the current progress of new-generation potassium-based primary explosives and their methods of preparation, energetic properties, and applications, but also a further comparison with traditional primary explosives. In addition, this work discusses the necessity of heavy metal-free primary explosives and the major challenges faced in replacing traditional primary explosives.

关键词： Green primary explosives Heterocyclic compounds Synthesis Energetic properties

Research status of lacustrine mudrock deposition constrained from astronomical forcing

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Journal of Palaeogeography 2022年第3期11卷 315-331页

作者： Qi Zhong jian-guo zhang Dong Tang jian-Hui jiang Jing-Jing Shen Mu-Xin Cai Pin-Xie Li School of Energy Resources China University of Geosciences(Beijing)Beijing 100083China Key Laboratory of Strategy Evaluation for Shale Gas Ministry of Land and ResourcesBeijing 100083China Exploration and Development Research Institute of Shengli Oilfield Branch of Sinopec Dongying 257015Shandong ProvinceChina

The sources,transportation and depositional processes of lacustrine mudrock are still poorly *** studies have demonstrated the controlling effect of astronomical forcing on lacustrine mudrock deposition,but its depositional mechanism and evolution are still not systematically *** research related to astronomical forcing exclusively highlights the sedimentation of carbonate rocks in deep-water lacustrine setting,with insufficient attention paid to the thick organic-rich,deep-lake *** the increasing interest in exploration and development of shale oil and gas accumulations,it is urgent to deeply understand depositional rules of lacustrine *** study reviews sediment sources,depositional mechanism and evolution process of mudrock through expounding the correlations between the periodic changes of astronomical forces,the parameters of Earth orbital and mudrock *** investigating the existing literature and using some actual data of Jiyang Depression,Bohai Bay Basin in East China,this study expounds on the influence of astronomical cycles on the deposition of lacustrine ***,efforts are made to analyze the effects of various orbital parameters(e.g.,precession,obliquity,and eccentricity with the periods ranging from tens of thousands years to million years)on the deposition of mudrock from small-scale(decimeters to meters)to large-scale(10s to 100s meters).Further,it is feasible to apply the high-precision isochronous stratigraphic correlation into clarifying the distribution of favorable shale oil and gas *** conclude,this study enunciates the sedimentation of mudrock from a new perspective(astronomical forcing)and provides a direction for the research on sedimentation of fine-grained sedimentary rocks.

关键词： Astronomical cycles Lacustrine mudrock deposition Organic-rich mudrock Research status and prospects

Treatment of early-onset scoliosis: techniques, indications, and complications

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Chinese Medical Journal 2020年第3期133卷 351-357页

作者： Yan-Bin zhang jian-guo zhang Department of Education Beijing Jishuitan Hospital4th Clinical Medical College of Peking UniversityBeijing 100035China Department of Orthopedics Peking Union Medical College HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100730China.

The treatments for early-onset scoliosis(EOS)remain great challenges for spine *** study aimed to comprehensively review the treatments for EOS,especially the advancements made in the last *** studies on EOS were retrieved through a search on PubMed,UpToDate,the Web of Science Core Collection and Scopus were *** most pertinent information related to the current treatments for EOS was *** foci of treatments for EOS have included creating a well-developed thoracic cavity,improving lung volume,and improving pulmonary *** treatments include bracing,casting,halo-gravity traction,and *** casting is the most effective conservative treatment for *** treatments mainly include growth-friendly techniques,which are generally classified into three types according to the amount of correction force applied:distraction-based,compression-based,and *** distraction-based systems include traditional or conventional growing rods,magnetically controlled growing rods,and vertical expandable prosthesis titanium *** compression-based systems include vertebral body stapling and *** growth-guided systems include the Shilla system and modern Luque *** addition,some newer techniques have emerged in recent years,such as posterior dynamic deformity correction(ApiFix).For EOS patients presenting with sharp deformities in a long,congenital spinal deformity,a hybrid technique,one-stage posterior osteotomy with short segmental fusion and dual growing rods,may be a good *** resection is the gold standard for congenital scoliosis caused by single *** the patient’s growth potential is preserved in growth-friendly surgeries,a high complication rate should be expected,as well as a prolonged treatment duration and additional *** about EOS and its treatment options is rapidly *** treatments have specific *** curve

关键词： Early-onset scoliosis Techniques Conservative treament Hemivertebra resection Fusionless Growth-friendly

Neural network mapping of gelastic behavior in children with hypothalamus hamartoma

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World Journal of Pediatrics 2024年第7期20卷 735-745页

作者： Zhi‑Hao guo jian‑guo zhang Xiao‑Qiu Shao Wen‑Han Hu Lin Sang Zhong Zheng Chao zhang Xiu Wang Chun‑De Li Jia‑Jie Mo Kai zhang Department of Neurosurgery Beijing Tiantan HospitalCapital Medical UniversityNo.119 South 4th Ring West RoadFengtai DistrictBeijing 100070China Department of Neurosurgery Beijing Neurosurgical InstituteCapital Medical UniversityBeijingChina Department of Neurology Beijing Tiantan HospitalCapital Medical UniversityBeijingChina Department of Neurosurgery Beijing Fengtai HospitalBeijingChina

Background Hypothalamus hamartomas(HHs)are rare,congenital,tumor-like,and nonprogressive malformations resulting in drug-resistant epilepsy,mainly affecting *** seizures(GS)are an early hallmark of epilepsy with *** aim of this study was to explore the disease progression and the underlying physiopathological mechanisms of pathological laughter in *** We obtained clinical information and metabolic images of 56 HH patients and utilized ictal semiology evaluation to stratify the specimens into GS-only,GS-plus,and no-GS subgroups and then applied contrasted trajectories inference(cTI)to calculate the pseudotime value and evaluate GS *** logistic regression was performed to identify neuroimaging-clinical predictors of GS,and then voxelwise lesion network-symptom mapping(LNSM)was applied to explore GS-associated brain *** cTI inferred the specific metabolism trajectories of GS progression and revealed increased complexity from GS to other seizure *** was further validated via actual disease duration(Pearson R=0.532,P=0.028).Male sex[odds ratio(OR)=2.611,P=0.013],low age at seizure onset(OR=0.361,P=0.005),high normalized HH metabolism(OR=−1.971,P=0.037)and severe seizure burden(OR=−0.006,P=0.032)were significant neuroimaging clinical *** revealed that the dysfunctional cortico-subcortico-cerebellar network of GS and the somatosensory cortex(S1)represented a negative *** This study sheds light on the clinical characteristics and progression of GS in children with *** identified distinct subtypes of GS and demonstrated the involvement of specific brain regions at the cortical–subcortical–cerebellar *** valuable results contribute to our understanding of the neural correlates of GS.

关键词： Contrasted trajectories inference Gelastic seizure Hypothalamus hamartoma Lesion network-symptom mapping Neural basis

Unraveling the complexities of adolescent depression:A call for action

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World Journal of Psychiatry 2024年第11期14卷 1772-1778页

作者： Yuan zhang Ming-Yan Hei Min-Zhong Wang jian-guo zhang Shu Wang Neonatal Center Beijing Children's HospitalCapital Medical UniversityNational Center for Children's HealthBeijing 100045China Department of Neurology Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinan 250021Shandong ProvinceChina Department of Neurosurgery Beijing Tiantan HospitalCapital Medical UniversityBeijing 100070China

The adolescent years are a period of profound change,both physically and *** many,these years are marked by excitement and exploration,but for others,they are fraught with challenges that can lead to significant mental health ***,in particular,has become an increasingly prevalent concern among adolescents worldwide,and its multifaceted etiology requires a comprehensive approach to understanding and intervention.A recent study on the relationships among negative life events,dysfunctional attitudes,social support,and depressive symptoms in Chinese adolescents offers valuable insights into the complex interplay between various factors contributing to adolescent *** authors explore a moderated mediation model to better understand how these factors interact with and contribute to the onset of *** article aims to delve into the key findings of the study,highlight its implications for clinical practice,and encourage further research in this critical area.

关键词： Depression Adolescent Mental health Dysfunctional attitudes Social support Negative life events

Cloning, Expression and Characterization of Translationally Controlled Tumor Protein (TCTP) Gene from Flatfish Turbot (Scophthalmus maximus)

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Journal of Ocean University of China 2008年第2期7卷 184-192页

作者： WANG jian guo Huarong zhang Shicui YIN Licheng guo Bin WANG Shaojie College of Marine Life Sciences Ocean University of China Qingdao 266003 P. R. China

A full-length cDNA encoding translationally controlled tumor protein of marine flatfish turbot （Scophthalmus maximus）, SmTCTP, was isolated with rapid amplification of cDNA Ends （RACE）. SmTCTP consisted of a 5＇ untranslated region （UTR） of 84 bp, a 3＇ UTR of 451 bp and an open reading frame （ORF） of 513 bp, encoding a protein of 170 amino acid residues, which contained two signature sequences of TCTP family. The 5＇UTR of SmTCTP started with a 5＇-terminal oligopyrimidine tract （5＇-TOP）, a typical feature for translationally controlled mRNAs. The deduced amino acid sequence of SmTCTP was similar to the other known vertebrate TCTPs in a range of 58.8% to 64.1%. The length of fish TCTPs was diverse among species, e.g., TCTP of turbot and sea perch （Lateolabraxjaponicus） is 170 aa in length, while that of zebrafish （Danio rerio） and rohu （Labeo rohita） is 171 aa in length. Northern blot analysis revealed that SmTCTP has only one type of mRNA. Its expression level in albino skin was slightly higher than that in normal skin. We constructed the pET3Oa-SmTCTP expression plasmid. The recombinant protein of His-tag SmTCTP was over-expressed in E. coli, purified and identified with peptide mass fingerprinting. These results may pave the way of further investigation of the biological function of TCTP in fish.

关键词： translationally controlled tumor protein (TCTP) turbot RACE Northern blot expression peptide mass fingerprinting

Physical generation of random numbers using an asymmetrical Boolean network

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Chinese Physics B 2021年第11期30卷 297-303页

作者： Hai-Fang Liu Yun-Cai Wang Lu-Xiao Sang jian-guo zhang Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of EducationTaiyuan University of TechnologyTaiyuan 030024China College of Physics and Optoelectronics Taiyuan University of TechnologyTaiyuan 030024China Guangdong Provincial Key Laboratory of Photonics Information Technology Guangzhou 510006China School of Information Engineering Guangdong University of TechnologyGuangzhou 510006China

Autonomous Boolean networks(ABNs)have been successfully applied to the generation of random number due to their complex nonlinear dynamics and convenient on-chip *** of the ABNs used for random number generators show a symmetric topology,despite their oscillations dependent on the inconsistency of time delays along *** address this issue,we suggest an asymmetrical autonomous Boolean network(aABN)and show numerically that it provides large amplitude oscillations by using equal time delays along links and the same logical *** results show that the chaotic features of aABN are comparable to those of symmetric ABNs despite their being made of fewer ***,we put forward a random number generator based on aABN and show that it generates the random numbers passing the NIST test suite at 100 Mbits/*** unpredictability of the random numbers is analyzed by restarting the random number generator *** aABN may replace symmetrical ABNs in many applications using fewer nodes and,in turn,reducing power consumption.

关键词： autonomous Boolean networks random numbers chaos unpredictability