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Theoretical Investigation on Photoionization and Dissociative Photoionization of Toluene
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作者 赵玉杰 詹友胜 +5 位作者 李李 李欣 连相宇 黄培 盛六四 陈军 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2017年第3期303-311,I0001,I0002,共11页
The photoionization and dissociation photoionization of toluene have been studied using quantum chemistry methods. The geometries and frequencies of the reactants, transition states and products have been performed at... The photoionization and dissociation photoionization of toluene have been studied using quantum chemistry methods. The geometries and frequencies of the reactants, transition states and products have been performed at B3LYP/6-311++G(d,p) level, and single-point energy calculations for all the stationary points were carried out at DFT calculations of the optimized structures with the G3B3 level. The ionization energies of toluene and the ap- pearance energies for major fragment ions, C7H7+, C6H5+, C5H6+, C5H5+, are determined to be 8.90, 11.15 or 11.03, 12.72, 13.69, 16.28 eV, respectively, which are all in good agree- ment with published experimental data. With the help of available published experimental data and theoretical results, four dissociative photoionization channels have been proposed: CTHT++H, C6Hs++CH3, C5H6+WC2H2, CsHs++C2H2+H. Transition structures and intermediates for those isomerization processes are determined in this work. Especially, the structures of C5H6+ and C5H5+ produced by dissociative photoionization of toluene have been defined as chain structure in this work with theoretical calculations. 展开更多
关键词 Quantum chemical calculations TOLUENE dissociative photoionization mech-anism Density functional theory Transition states
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Effectiveness of lorazepam-assisted interviews in an adolescent with dissociative amnesia A case report
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作者 Yuna Seo Mi-Hee Shin +1 位作者 Sung-Gon Kim Ji-Hoon Kim 《Neural Regeneration Research》 SCIE CAS CSCD 2013年第2期186-190,共5页
To facilitate gathering information during a psychiatric interview, some psychiatrists advocate augmenting the interview using drugs. Rather than barbiturates, benzodiazepines have been used for drug-assisted intervie... To facilitate gathering information during a psychiatric interview, some psychiatrists advocate augmenting the interview using drugs. Rather than barbiturates, benzodiazepines have been used for drug-assisted interviews. Dissociative amnesia is one of the indications for these interviews. Herein, we present the case of a 15-year-old female who was diagnosed as having dissociative amnesia because of conflicts with her friends. She was administered a Iorazepam-assisted interview to aid recovery of her memories. In this case, a small dose of Iorazepam was sufficient to recover her memories without any adverse effects. 展开更多
关键词 neural regeneration clinical practice dissociative amnesia dissociative disorder dissociation drug-assisted interview amobarbital Iorazepam BENZODIAZEPINE ADOLESCENT memory loss emotional distress DISTRESS grant-supported paper NEUROREGENERATION
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Dissociative Photoionization of 1,2-Epoxyoctane Studied with Synchrotron Radiation
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作者 王洋洋 刘亚伟 +6 位作者 康旭 赵小利 王林 胡辍招 刘付轶 盛六四 朱林繁 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2016年第5期533-538,I0001,共7页
Dissociative photoionization of 1,2-epoxyoctane was investigated by synchrotron radiation vacuum ultraviolet photons in the energy region of 9.8-16.6 eV under ultrasonic molec-ular beam. Dissociative fragment ions wer... Dissociative photoionization of 1,2-epoxyoctane was investigated by synchrotron radiation vacuum ultraviolet photons in the energy region of 9.8-16.6 eV under ultrasonic molec-ular beam. Dissociative fragment ions were measured with reffection time-of-ight mass spectrometer at di erent photon energies. Appearance potentials of the dominative ion fragments were determined through photoionization efficiency curves. The structures and energies of the parent, ionized and neutral radicals were obtained with G3 calculations. Through comparing the experimental results with the theoretical calculations, we proposed the dissociative channels for the photoionization of 1,2-epoxyoctane. 展开更多
关键词 1 2-Epoxyoctane dissociative photoionization Appearance potential Dissociation channel
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Dissociative Electron Attachment to 1,2-Dichlorobenzene using Mass Spectrometry with Phosphor Screen
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作者 宣传进 王旭东 +3 位作者 夏磊 吴斌 李浩 田善喜 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2014年第6期628-630,I0003,共4页
Anion mass spectrometry is developed on the basis of our home-made anion velocity map imaging apparatus. The Cl^-; product efficiency curve for dissociative electron attachment to 1,2-dichlorobenzene is obtained from ... Anion mass spectrometry is developed on the basis of our home-made anion velocity map imaging apparatus. The Cl^-; product efficiency curve for dissociative electron attachment to 1,2-dichlorobenzene is obtained from 0.2 to 8 eV, meanwhile the sliced images of this anion are recorded at 1.2 and 6.0 eV corresponding to two peak positions of the product efficiency curve. 展开更多
关键词 dissociative electron attachment 1 2-Dichlorobenzene Anion mass spectrometry
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Relationships between childhood trauma and dissociative,psychotic symptoms in patients with schizophrenia:a case-control study 被引量:2
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作者 Tugce Taskin Uyan Mehmet Baltacioglu Cicek Hocaoglu 《General Psychiatry》 CSCD 2022年第1期34-41,共8页
Background Childhood trauma(CT)is an important risk factor in the emergence and clinical course of psychiatric disorders.In the latest literature,an association exists between CT and patients with schizophrenia.There ... Background Childhood trauma(CT)is an important risk factor in the emergence and clinical course of psychiatric disorders.In the latest literature,an association exists between CT and patients with schizophrenia.There is also a strong relationship between the dissociative symptoms of schizophrenia and the presence of CT.Aims The aim of this study is to examine the relationship between CT and dissociative,positive and negative symptoms in patients with schizophrenia.Methods One hundred patients with schizophrenia and 100 healthy volunteers were included in the study.The Sociodemographic Data Form,Dissociative Experiences Scale(DES),Positive and Negative Syndrome Scale(PANSS),and Childhood Trauma Questionnaire(CTQ)were administered to all participants.Results The CTQ and DES scores of the schizophrenia group were significantly higher than those of the control group.In patients with schizophrenia,a positive association was found between positive symptoms and DES scores.In terms of negative symptoms,a positive association was found between apathetic social withdrawal and CTQ-emotional neglect(EN),CTQ-physical neglect(PN)and CTQ total scores.There was a significant positive correlation between CTQ-EN scores and negative symptoms and PANSS scores.No significant relationship was found between negative symptoms and DES scores.Conclusions High rates of CT and dissociative symptoms are seen in patients with schizophrenia.In addition,the findings of the relationship between CT and dissociative,positive and negative symptoms are also noteworthy.Therefore,it may be important for clinicians to assess trauma history during the psychiatric evaluation of patients with schizophrenia. 展开更多
关键词 group. dissociative finding
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A simulation study of 630 nm and 557.7 nm airglow variations due to dissociative recombination and thermal electrons by high-power HF heating 被引量:3
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作者 Tong Dang JiuHou Lei +1 位作者 XianKang Dou WeiXing Wan 《Earth and Planetary Physics》 2017年第1期44-52,共9页
One of the important effects of the ionospheric modification by high-power waves is the airglow enhancement. Both the thermal electrons and the dissociation recombination contribute to generate the airglow emissions d... One of the important effects of the ionospheric modification by high-power waves is the airglow enhancement. Both the thermal electrons and the dissociation recombination contribute to generate the airglow emissions during HF heating. However, the relative importance of the airglow emission induced by dissociative recombination and thermal electrons has been rarely investigated. In this study, we carry out a simulation study on the airglow produced by high-power HF heating at nighttime associated with dissociative recombination and thermal electrons. SAMI2(Sami2 is Another Model of the Ionosphere) is employed to simulate the ionospheric variations during the HF heating. The main conclusions from this study are as follows:(1) For the airglow induced by dissociative recombination, both 630.0 nm and 557.7 nm emissions show a decrease at the heating wave reflection height during the heating period,while when the heating is turned off, an increase is shown at lower altitudes. The reduction of airglow during the heating is caused by the rapid increase of electron temperature and the diffusion of plasmas dominates the after-heating airglow enhancement.(2) 630.0 nm emission due to thermal electrons is greatly enhanced at the wave reflection height, indicating that thermal electrons play a major role in exciting 630.0 nm emission. For the 557.7 nm emission, the excitation threshold(4.17 e V) is too high for thermal electrons.(3) The combined effect of dissociative recombination and thermal electrons could be the possible reason for the observed X-mode(extraordinary mode) suppression of 630.0 nm airglow during O-mode(ordinary mode) enhancement. 展开更多
关键词 AIRGLOW thermal electron dissociative recombination HF heating
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Dissociative ionization cross sections of CO_2 at electron impact energy of 5 keV 被引量:1
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作者 王恩亮 沈镇捷 +3 位作者 阳弘江 唐亚国 单旭 陈向军 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第11期280-284,共5页
The dissociative ionization of CO2 induced by 5 keV electrons in two-body and three-body dissociative channels of CO2+2 and CO3+2 is identified by the ion-ion coincidence- method using a momentum imaging spectromete... The dissociative ionization of CO2 induced by 5 keV electrons in two-body and three-body dissociative channels of CO2+2 and CO3+2 is identified by the ion-ion coincidence- method using a momentum imaging spectrometer. The partial ionization cross sections (PICSs) of different ionic fragments are measured and the results generally agree with the calculations made by a semi-empirical approach. Furthermore, the PICSs of the dissociative channels are also obtained by carefully considering the detection efficiency of the micro-channel plates and the total transmission efficiency of the time of flight system. 展开更多
关键词 electron collision partial ionization cross section dissociative ionization cross section momentumimaging
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The multielectron dissociative ionization dynamics of N2 molecule in intense femtosecond laser fields with arbitrary polarization 被引量:1
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作者 陈建新 龚旗煌 《Chinese Physics B》 SCIE EI CAS CSCD 2005年第10期1960-1965,共6页
The field-ionization Coulomb explosion model is extended to investigate the multielectron dissociative ionization process of N2 molecule irradiated by an intense femtosecond laser field with an arbitrary polarization.... The field-ionization Coulomb explosion model is extended to investigate the multielectron dissociative ionization process of N2 molecule irradiated by an intense femtosecond laser field with an arbitrary polarization. The ionization process of N2 molecule is found to be optimal at the critical internuclear distance Rc=7a.u., which is independent of the laser polarization state, the molecular explosion channel and the angle between the molecular axis and the direction of laser electric field. The kinetic energies of the ion fragments are identical in the cases of linear and circular polarizations at the same incident laser intensity. However, the probability of electron ionization is very sensitive to the above three parameters. At the critical distance Rc=7a.u. the angular dependence of the threshold intensity for the over-the-barrier ionization leads to the geometric alignment of molecules in the case of linear polarization. The threshold intensity in the case of circular polarization is apparently higher than that in the case of linear polarization, which can well explain the significant decrease of ionization in the case of circular polarization. The numerical calculations are compared with the experimental measurements. 展开更多
关键词 multielectron dissociative ionization arbitrary femtosecond laser polarization N2
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A case of dissociative convulsions presented as frequent epilepsylike seizures 被引量:1
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作者 Jing Nie Zhenhua Song Xiaohua Liu 《General Psychiatry》 CSCD 2019年第4期218-220,共3页
Dissociative convulsions, a prominent form of dissociative (conversion) disorder formerly known as hysteria, are a common and elusive differential diagnosis from epilepsy. However, the treatment of such patients is al... Dissociative convulsions, a prominent form of dissociative (conversion) disorder formerly known as hysteria, are a common and elusive differential diagnosis from epilepsy. However, the treatment of such patients is always challenging and frustrating due to poor response to the routinely used interventions in most situations. Here, we present a case with dissociative convulsions in order to catch the eye of the clinicians and researchers on the recognition of clinical manifestation and exploration of therapeutic strategies. 展开更多
关键词 epilepsylike dissociative CONVULSIONS
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Subcutaneous Dissociative Conscious Sedation (sDCS) an Alternative Method of Anesthesia for Fiberoptic Bronchoscopy 被引量:1
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作者 Mihan J. Javid Zoha Alinejad +1 位作者 Asghar Hajipour Zahra Khazaeipour 《Open Journal of Anesthesiology》 2015年第7期149-154,共6页
Objective: Current randomized clinical trial was conducted to compare the efficacy and side effects of dissociative conscious sedation and conscious sedation in patients under bronchoscopy. Methods: In this randomized... Objective: Current randomized clinical trial was conducted to compare the efficacy and side effects of dissociative conscious sedation and conscious sedation in patients under bronchoscopy. Methods: In this randomized clinical trial, 110 patients scheduled for Fiberoptic Bronchoscopy in a training hospital in 2012 were enrolled and randomly assigned to receive either SC ketamine plus IV fentanyl (dissociative conscious sedation) or placebo plus IV fentanyl (conscious sedation) and the efficacy and side effects were assessed and compared. Results: There was significant difference between systolic and diastolic blood pressure and heart rate in two groups and more stability was shown in dissociative conscious sedation group (P < 0.05). Also the incidence of cough, the need to extra dose of fentanyl and recall showed less frequency in dissociative conscious sedation group (P < 0.05). Conclusions: Totally, according to the obtained results, it may be concluded that Subcutaneous Dissociative Conscious Sedation (sDCS) in comparison to Conscious Sedation is significantly more efficient accompanied by less side effects in fiberoptic bronchoscopy and using this method is recommended. Implication of the Manuscript: The study was designed in order to evaluate the efficacy of subcutaneous Dissociative Conscious Sedation (sDCS) Method in fiberoptic bronchoscopy. 展开更多
关键词 SUBCUTANEOUS dissociative CONSCIOUS SEDATION KETAMINE Fiberoptic BRONCHOSCOPY
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Subcutaneous Dissociative Conscious Sedation (sDCS) a New Approach to Compromised Airway in Mediastinal Masses 被引量:1
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作者 Mihan J. Javid Mohammad B. Rahim Shahab Rafiian 《Open Journal of Anesthesiology》 2012年第4期166-169,共4页
Purpose: Anesthesia and airway management for mediastinal masses are challenging and are accompanied by mortality and morbidity. Avoiding the loss of airway muscular tone in mediastinal masses has been confirmed neces... Purpose: Anesthesia and airway management for mediastinal masses are challenging and are accompanied by mortality and morbidity. Avoiding the loss of airway muscular tone in mediastinal masses has been confirmed necessary to avoid airway collapse. Sufficient spontaneous ventilation is of paramount importance in order to reduce the rate of mortality and morbidity. Various anesthetics and anesthesia techniques have been used for maintaining spontaneous ventilation and patent airway. In this report, a successful double lumen endobronchial intubation using “subcutaneous dissociative conscious sedation” as a novel method in the management of compromised airway (a case of a mediastinal mass) is presented. Clinical features: A 42 year- old, 62 Kg man was presented for an open biopsy of a middle mediastinal mass. The patient had a history of chest pain, dyspnea, cough, fever and sweats for 2 months. Regarding to the life threatening nature of mediastinal masses resulting from unpredictable events of airway obstruction and the reported cases of deaths after induction of anesthesia in patients with mediastinal masses and regarding to the importance of not losing muscular tone and keeping airway tone intact in patients with mediastinal masses” subcutaneous Dissociative Conscious Sedation (a novel method of anesthesia)”was selected in order to guarantee the safety of the patient and keep the airway secure. Conclusion: Owing to the characteristics of the “subcutaneous dissociative conscious sedation” this method is suggested as an appropriate substitute to general anesthesia for Endobronchial Double Lumen Intubation in mediastinal masses and compromised airway. 展开更多
关键词 AIRWAY Management Difficult AIRWAY Low Dose KETAMINE MEDIASTINAL Masses SUBCUTANEOUS KETAMINE SUBCUTANEOUS dissociative CONSCIOUS SEDATION
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Effects of Vibrational and Rotational Excitations on Dissociative Chemisorption Dynamics of N_(2) on Fe(111)
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作者 Huixia Shi Tianhui Liu +3 位作者 YanlinFu Hao Wu Bina Fu Dong HZhang 《Chinese Journal of Chemical Physics》 SCIE EI CAS CSCD 2022年第3期443-450,I0001,I0002,共10页
The dissociative chemisorption of N_(2) is the rate-limiting step for ammonia synthesis in industry.Here,we investigated the role of initially vibrational excitation and ro-tational excitation of N_(2) for its reactiv... The dissociative chemisorption of N_(2) is the rate-limiting step for ammonia synthesis in industry.Here,we investigated the role of initially vibrational excitation and ro-tational excitation of N_(2) for its reactivity on the Fe(111)surface,based on a recently developed six-dimensional potential energy surface.Six-dimensional quantum dynamics study was carried out to investi-gate the effect of vibrational excitation for incidence energy below 1.6 eV,due to sig-nificant quantum effects for this reaction.The effects of vibrational and rotational excitations at high incidence energies were revealed by quasiclassical trajectory calculations.We found that raising the translational energy can enhance the dissociation probability to some extent,however,the vibrational excitation or rotational excitation can promote disso-ciation more efficiently than the same amount of translational energy.This study provides valuable insight into the mode-specific dynamics of this heavy diatom-surface reaction. 展开更多
关键词 Quantum dynamics Quasiclassical trajectory dissociative chemisorption Vi-brational excitation Rotational excitation
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"Initial Potential" Effect on the Dissociative Adsorption of Methanol on A Roughened Platinum Electrode in Acidic Solution
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作者 Ze Lin LI Bin REN +2 位作者 Chun Xing SHE Xiao Ming XIAO Zhong Qun TIAN 《Chinese Chemical Letters》 SCIE CAS CSCD 2001年第10期913-916,共4页
In situ Raman spectroscopic and voltammetric studies indicate that dissociative adsorption of methanol on the rough platinum electrode occurs in the hydrogen ad/desorption potential range, and the dissociative extent ... In situ Raman spectroscopic and voltammetric studies indicate that dissociative adsorption of methanol on the rough platinum electrode occurs in the hydrogen ad/desorption potential range, and the dissociative extent depends on the initial potential of the electrode before contacting methanol, in addition to the contacting time. As the dissociative product, carbon monoxide competes the site of strongly bound hydrogen preferentially, and shifts the ad/desorption potentials of weakly bound hydrogen towards more positive ones gradually with the increase of CO coverage. Whereas, formaldehyde dissociates more easily by far and completely suppresses H-adsorption. The confocal Raman spectroscopy developed on transition metals shows some intriguing advantages in investigating electrocatalytic oxidation of small organic molecules. 展开更多
关键词 METHANOL FORMALDEHYDE dissociative adsorption in situ Raman spectroscopy.
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Dissociative Electron Attachment to Carbon Dioxide
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作者 Bin Wu Xu-dong Wang +2 位作者 Xiao-fei Gao Hao Li Shan Xi Tian 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2020年第5期521-531,I0078,共12页
Our experimental progresses on the reaction dynamics of dissociative electron attachment(DEA)to carbon dioxide(CO2)are summarized in this review.First,we introduce some fundamentals about the DEA dynamics and provide ... Our experimental progresses on the reaction dynamics of dissociative electron attachment(DEA)to carbon dioxide(CO2)are summarized in this review.First,we introduce some fundamentals about the DEA dynamics and provide an epitome about the DEAs to CO2.Second,the experimental technique developments are described,in particular,on the highresolution velocity map imaging apparatus in which we put a lot of efforts during the past two years.Third,our findings about the DEA dynamics of CO2 are surveyed and briefly compared with the others’work.At last,we give a perspective about the applications of the DEA studies and highlight the inspirations in the production of molecular oxygen on Mars and the catalytic transformations of CO2. 展开更多
关键词 dissociative electron attachment Carbon dioxide Velocity map imaging Reaction dynamics
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Role of Helium Droplets in Mass Spectra of Diatomics: Suppression of Dissociative Reactions
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作者 Andrew M.Ellis Sheng-fu Yang 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2015年第4期-,共4页
关键词 Helium nanodroplets Electron impact Charge transfer dissociative reaction
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Dissociative disorder presenting as foreign accent syndrome
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作者 Nikita Rajpal Subho Chakrabarti 《World Journal of Psychiatry》 SCIE 2013年第4期103-106,共4页
The foreign accent syndrome(FAS) is a rare speech disorder, characterised by the appearance of a new accent, different from the speaker's native language and perceived as foreign by others. In the majority of pati... The foreign accent syndrome(FAS) is a rare speech disorder, characterised by the appearance of a new accent, different from the speaker's native language and perceived as foreign by others. In the majority of patients, FAS is secondary to focal brain damage caused by stroke or other neurological disorders. Infrequently, FAS has been reported in association with psychiatric disorders, including dissociative or conversion disorders. The case of a young woman with recurrent episodes of speaking with a foreign accent is described. Repeated neurological examinations, imaging and electroencephalography did not reveal any brain abnormality. However, there was a history of a difficult childhood, alcohol dependence in the father, parental discord, alleged sexual abuse in the past, interpersonal difficulties and parental death. Episodes were precipitated by stressful life circumstances and resolved spontaneously, or with supportive treatment. She had additional "suspect" symptoms such as non-epileptic seizures, aphonia and motor paralysis. All these features indicated that a dissociative disorder was involved in the genesis of her FAS. The influence of external factors such as the media was unclear. Generally biological factors have been implicated in the onset of FAS, but the presentation in this young woman suggests that psychological factors such as personality, trauma, stressful life events and psychiatric disorder; familial factors such as parental discord and parental death and family conflicts; and, social factors such the possible influence of the media may also be involved in the production of foreign accents by patients. 展开更多
关键词 FOREIGN ACCENT SYNDROME dissociative DISORDER Conversion DISORDER PSYCHOSOCIAL
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Ion-Velocity Imaging Study of Dissociative Charge Exchange Reactions between Ar^(+)and trans-/cis-Dichloroethylene
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作者 Zi-Xin Chen Jie Hu +2 位作者 Yaya Zhi Chun-Xiao Wu Shan Xi Tian 《Chinese Journal of Chemical Physics》 SCIE EI CAS CSCD 2023年第5期509-516,I0001,共9页
Dissociative charge exchange re-actions between Ar^(+)ion and trans-/cis-dichloroethylene(trans-/cis-C_(2)H_(2)Cl_(2))are investi-gated with the ion-velocity imag-ing technique.The dechlorinated product C_(2)H_(2)Cl^(... Dissociative charge exchange re-actions between Ar^(+)ion and trans-/cis-dichloroethylene(trans-/cis-C_(2)H_(2)Cl_(2))are investi-gated with the ion-velocity imag-ing technique.The dechlorinated product C_(2)H_(2)Cl^(+)is the predomi-nant,and most of this product show the spatial distribution around the target,implying that the dissociation occurs in the large impact-parameter collision and via the energy resonant charge transfer.Meanwhile,a few C_(2)H_(2)Cl^(+)locate around the center-of-mass,which is at-tributed to the fragmentation of intimate association between C_(2)H_(2)Cl_(2)and Ar^(+)or in the small impact-parameter collision.The product C_(2)HCl_(+)exhibits the velocity distribution fea-tures similar to those of C_(2)H_(2)Cl_(+).The rarest product C_(2)HCl_(2)+shows the distributions around the molecular target,due to the quick dehydrogenation after the energy-resonant charge transfer in the large impact-parameter collision. 展开更多
关键词 Ion-molecule reaction dissociative charge exchange Velocity map imaging
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The Feasibility of Endotracheal Intubation with Subcutaneous Dissociative Conscious Sedation versus General Anesthesia: A Prospective Randomized Trial
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作者 Sanaz Shabani Mihan J. Javid Jayran Zebardast 《Open Journal of Anesthesiology》 2014年第2期41-45,共5页
Despite outstanding improvements in anesthesia techniques and anesthetics, difficult airway is still a dilemma and is accompanied by morbidity and mortality. The aim of this study is to compare the feasibility of endo... Despite outstanding improvements in anesthesia techniques and anesthetics, difficult airway is still a dilemma and is accompanied by morbidity and mortality. The aim of this study is to compare the feasibility of endotracheal intubation with the traditional method of general anesthesia by using muscle relaxants, and “sDCS” (Subcutaneous Dissociative Conscious Sedation) which has been recently reported as an efficient method of anesthesia with the capability of maintaining spontaneous ventilation and providing an appropriate situation for larynxgoscopy and endotracheal intubation. Material and Methods: This randomized clinical trial was conducted on 100 patients who were scheduled for elective laparotomy. Patients were randomly divided into two groups: group A and group B. In group A, patients underwent general anesthesia with thiopental sodium and relaxant. In group B, patients underwent “subcutaneous Dissociative Conscious Sedation” and received low dose subcutaneous ketamine and intravenous narcotic with no relaxant. The feasibility of direct laryngoscopy and tracheal intubation, hemodynamic changes, desaturation (SpO2 < 90%), patient cooperation, patient comfort, hallucination, nausea and vomiting, nystagmus and salivation were evaluated in two groups. Adverse events including apnea and need for positive pressure mask ventilation, additional dose of fentanyl were recorded in group B. The anesthesiologist who performed the procedure was asked about the patient calmness and cooperation during the procedure and the feasibility of laryngoscopy and tracheal intubation. The incidence of nausea and vomiting in post-operative care unit was recorded too. Results: Hemodynamic variables were comparable in two groups. No event of irreversible respiratory depression, desaturation, need for positive pressure ventilation and hallucination was observed in group B. All patients were cooperative and obedient during the laryngoscopy and tracheal intubation. The incidence of nausea was not statistically significant. The anesthesiologist was satisfied by the quality of patient’s cooperation for laryngoscopy in both groups. Conclusion: Subcutaneous dissociative conscious sedation is comparable with general anesthesia to provide desirable situation for laryngoscopy and tracheal intubation. 展开更多
关键词 Difficult Airway KETAMINE LARYNGOSCOPY SUBCUTANEOUS dissociative Conscious SEDATION TRACHEAL INTUBATION
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Dissociation, Dissociative Disorders and Partial Psychosis
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作者 Domina Petric 《Open Journal of Medical Psychology》 2022年第4期243-253,共11页
Background: Dissociation may be defined as a psychopathological process in which an individual’s psyche splits into two or more parts. The division of personality is a key element in trauma, especially if the patient... Background: Dissociation may be defined as a psychopathological process in which an individual’s psyche splits into two or more parts. The division of personality is a key element in trauma, especially if the patient is not able to cope with it. At least one part of personality may be relatively able to understand and function in the objective reality, whilst other part(s) of the psyche may be more or less disorganized, dysfunctional and less able to understand the truth. Methods: literature review;conceptualization of dissociation, dissociative disorders and partial psychosis from medical and philosophical perspective. Conclusion: The core of dissociation and dissociative disorders is usually psychological trauma, especially emotional trauma, although some individuals may experience dissociation without any obvious cause or trigger. Carefully designed trauma-focused psychotherapy and psychosocial support are considered and must be further studied as the cornerstone of multidisciplinary approach in the treatment of dissociative disorders. Dissociative identity disorder in its severe form may resemble characteristics of partial psychosis. Some patients suffering from partial psychosis have narcissistic personality traits, such as shamelessness, magical thinking, arrogance, envy, entitlement, exploitation and bad boundaries, and therefore, developing healthy self-love, which is based on healthy self-criticism, realistic thinking, humility, gratefulness, democratic behavior, altruism and good boundaries, might be helpful for these patients. 展开更多
关键词 DISSOCIATION dissociative Disorders Partial Psychosis Psychological Trauma
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Dissociative Photoionization of 1,4-Dioxane with Tunable VUV Synchrotron Radiation 被引量:1
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作者 王明 陈军 +6 位作者 费维飞 李照辉 余业鹏 林烜 单晓斌 刘付轶 盛六四 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2017年第4期379-388,I0001,共11页
The photoionization and photodissociation of 1,4-dioxane have been investigated with a reflectron time-of-flight photoionization mass spectrometry and a tunable vacuum ultraviolet synchrotron radiation in the energy r... The photoionization and photodissociation of 1,4-dioxane have been investigated with a reflectron time-of-flight photoionization mass spectrometry and a tunable vacuum ultraviolet synchrotron radiation in the energy region of 8.0-15.5 eV. Parent ion and fragment ions at m/z 88, 87, 58, 57, 45, 44, 43, 41, 31, 30, 29, 28 and 15 are detected under supersonic conditions. The ionization energy of DX as well as the appearance energies of its fragment ions C4H7O2^+, C3H6O^+, C3H5O^+, C2H5O^+, C2H4O^+, C2H3O^+, C3H5^+, CH3O^+, C2H6^+, C2H5^+/CHO^+, C2H4^+ and CH3^+ was determined from their photoionization efficiency curves. The optimized structures for the neutrals, cations, transition states and intermediates related to photodissociation of DX are characterized at the B3LYP/6-31+G(d,p) level and their energies are obtained by G3B3 method. Possible dissociative channels of the DX are proposed based on comparison of experimental AE values and theoretical predicted ones. Intramolecular hydrogen migrations are found to be the dominant processes in most of the fragmentation pathways of 1,4-dioxane. 展开更多
关键词 1 4-Dioxane VUV photoionization mass spectra Appearance energy Dissociation channel G3B3
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