5-(5-硝基-2-吡啶偶氮)-2,4-二氨基甲苯分光光度法测定微量铱(Ⅲ)的研究

研究了用新试剂５－（５－硝基－２－吡啶偶氮）－２，４－二氨基甲苯（５－ＮＯ２－ＰＡＤＡＴ）分光光度法测定微量铱（Ⅲ）的适宜条件。结果表明，在ｐＨ５．０－６．４的ＮａＡｃ－ＨＡｃ缓冲溶液中，５－Ｎ０２－ＰＡＤＡＴ与Ｉｒ（Ⅲ）反应生成稳定的络合物。在０．１２ｍｏｌ／ＬＨ２ＳＯ４溶液中其最大吸收波长，表现摩尔吸光系数铱浓度在０－０．７ｕｇ／ｍｌ范围内遵守比尔定律。以ＤＣＴＡ为掩蔽剂。大量的常见金属离子对测定无干扰，方法灵敏度高，选择性好，用于催化剂中微量铱的测定，结果满意。     

新试剂TADCAP的合成及钢样中镍的测定

报道了新显色剂２－（２－噻唑偶氮）－５－［（Ｎ，Ｎ－二羧基甲基）氨基］苯酚（ＴＡＤＣＡＰ）的合成及其与镍的显色反应。在ｐＨ７．４，络合物的最大吸收波长为５６２ｎｍ，络合物的表观摩尔吸光系数ε５６２＝７．２×１０~４，络合物的组成Ｎｉ~２＋：Ｒ＝１：２．求得络合物的表观稳定常数Ｋ＝１．７×１０~（１２）。建立的方法用于标准钢样中镍的测定，结果与标准值一致；回收率为９９．５％～１０１，８％。     

5－Br－PADAT分光光度法测定微量铂

本文研究了显色剂５－（５－溴－２－吡啶偶氮）－２,４－二氨基甲苯（５－Ｂｒ－ｐＡＤＡ）与铂（Ⅱ）的显色反应。在正丙醇存在下,在０．２￣１．０ｍｏｌ／ＬＨ＿３ＰＯ＿４介质,Ｈ飞介质中,放置３５ｍｉｎ,铂与５－Ｂｒ－ｐＡＤＡＴ形成稳定的１：１蓝紫色配合物,其最大吸收波长在６０２ｎｍ处,表现摩尔吸光系数为７．９×１Ｏ￣４·ｍｏｌ￣－１·ｃｍ￣－１．铂量在０～２５μｇ／２５５ｍｌ范围内符合比尔定律。应用本法测定了催化剂中微量的铂,结果满意。     

钼（Ⅳ）─3，5─diBr─PADAP─盐酸羟胺多元混配体系显色反应的研究及其分析应用

在ｐＨ２．４～３．５的酸性介质中及加热条件下,钼（ＶＩ）与２－（３,５一二溴－２－吡啶偶氮）－５－二乙氨基苯酚（３,５－ｄｉＢｒ－ＰＡＤＡＰ）及羟胺反应形成一种稳定的蓝色络合物,组成比为１：１：１。在十二烷基硫酸钠存在下,其最大吸收波长为６ｌ８ｎｍ,表现摩尔吸光系数为４．８×ｌ０￣４,钼含量在０～２５μｇ／１０ｍｌ时服从比尔定律。毫克量钨无干扰。铜、钴、镍、铁等高厂的干扰可通过离厂交换分离除去。本法用于测定软磁合金中的铝,获得了满意的结果。     

HPMTHP及路易斯碱铈（Ⅳ）混配配合物的合成与性质研究

首次合成了六种Ｃｅ（ＰＭＴＨＰ）＿４Ａ型混配配合物，其中ＨＰＭＴＨＰ为１－苯基－３－甲基－４－（２－噻吩甲酰基）吡唑啉酮－５，Ａ为邻菲罗啉（Ｐｈｅｎ）、２，２’－联吡啶（ｄｉＰｙ）、喹啉（Ｑｕｉｎ）、吡啶（Ｐｙ）、二苯亚砜（ＤＰＳＯ）和三苯基氧化膦（ＴＰＰＯ）。通过元素分析、红外光谱、紫外光谱、核磁共振谱、差热－热重分析及摩尔电导等分析测试，初步研究了配合物的组成结构和性质。     

Mo-5-Br-PADAP-OP三元络合物光度法测定钢铁中的钼

Ｍｏ－５－Ｂｒ－ＰＡＤＡＰ－ＯＰ三元络合物光度法测定钢铁中的钼李先春，王敦清，侯五爱（江西师范大学化学系，南昌，３３００２７）（山西大同高等专科学校化工系）５－Ｂｒ－ＰＡＤＡＰ为吡啶偶氮类显色剂［１］其化学学名为２－（５－溴－２－吡啶偶氮）－５－二乙...     

2—（3,5—二氯—2—吡啶偶氮）—5—二甲氨基苯胺作为铜的络合滴定指示剂的研究

研究了２－（３，５－二氯－２－吡啶偶氮）－５－二甲氨基苯胺作为铜的络合滴定新指示剂。结果表明，试剂能在ｐＨ３．０￣６．５时以ＥＤＴＡ滴定铜，终点由紫色突变为黄色（铜量多时为绿色）。终点变化敏锐，准确度高，比ＰＡＮ、ＰＡＲ等优越。该法可用于矿石中铜的测定。     

5-Br-PAN-S作为锌的络合滴定指示剂

研究了以１－（５－溴－２－吡啶偶氮）－２－萘酚－６－磺酸（５－Ｂｒ－ＰＡＮ－Ｓ）作为络合滴定指示剂测定锌。在ｐＨ６．０的ＨＡｃ－ＮａＡｃ介质中，加入５滴０．１％的５－Ｂｒ－ＰＡＮ－Ｓ溶液作为指示剂，以ＥＤＴＡ标准溶液对锌进行滴定，溶液颜色由紫红色变为黄色，终点突跃敏锐，准确度高。方法用于锌盐和合金中锌的测＊定，结果满意。     

HPMBP和DAM协同萃取Ln~(3 )的研究

研究了１－苯基－３－甲基－４－苯甲酰基吡唑酮－５（ＨＰＭＢＰ）和二安替吡啉甲烷（ＤＡＭ）的氯仿溶液从硝酸介质中对Ｌｎ３＋（Ｌｎ＝Ｌａ，Ｐｒ，Ｎｄ，Ｇｄ）的协同萃取，测定了其半萃取ｐＨ值，结果分别为４．３８（Ｌａ３＋）、３．９７（Ｐｒ３＋）、３．９２（Ｎｄ３＋）和３．８２（Ｇｄ３＋）。通过斜率法确定了协萃合物的组成为Ｌａ（ＰＭＢＰ）３（ＤＡＭ），并合成了固态萃合物。     

用BDAS—W（Ⅵ）—CPB三元配合物测定钼精矿中微量钨

研究了ＢＤＡＳ（２－Ｂｒｏｍｏ－４，５－ｄｉｈｙｄｒｏｘｙａｚｏｂｅｎｚｅｎｅ－４′－ｓｕｌｆｏｍａｔｅ（ａｂｂｒｅｖｉａｔｅｄａｓＢＤＡＳ）－Ｗ（Ⅵ）－ＣＰＢ（溴化十六烷吡啶）混合配位体系的分光光度特性，该体系适宜酸度为ｐＨ２．３～４．５氯乙酸介质，干扰离子少。ＢＤＡＳ－Ｗ（Ⅵ）－ＣＰＢ三元配合物的最大吸收波长λｍａｘ＝４９３ｎｍ在ＣＰＢ存在下Ｗ（Ⅵ）与ＢＤＡＳ所形成的配合物组成比为１：２。在０     

Social and physical anhedonia and valence and arousal aspects of emotional experience.

Two studies examined whether self-reported anhedonia is associated with 2 facets of emotional experience, valence and arousal. In Study 1, in multiple assessments of emotional experience (e.g., naturalistic and lab contexts and social and nonsocial situations), people with elevated social anhedonia (n = 40) reported less intensity of positive affect than both controls (n = 30) and people with elevated perceptual aberration-magical ideation (n = 29). Social anhedonia was also associated with providing less emotional content when describing what it is like to experience positive situations. In contrast, both social anhedonia and perceptual aberration-magical ideation were associated with increased frequency of negative affect for their daily experiences. Moreover, social anhedonia was not associated with a decrease specifically in high-arousal emotions. In Study 2 (n = 339), social and physical anhedonia (but not perceptual aberration-magical ideation) were again associated with decreased self-reported positive affect to lab stimuli. In these studies, results were not statistically accounted for by personality, current mood, or current distress. Overall, results suggest anhedonia may be associated with a general decrease in self-reported positive affect intensity. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Simultaneous and Sequential Photosonolysis of TCE and PCE

Aqueous solutions of trichloroethylene (TCE) and tetrachloroethylene (PCE) were treated in a flow-through reactor equipped with ultrasound and ultraviolet light sources. The reactor was operated as sonolysis (US), photolysis (UV), and simultaneous photosonolysis (UV/US) reactors; then as US, UV, and sequential UV/US reactors with the installation of a partition in the reactor. The reactor without the partition was simulated by using one continuously stirred-tank-reactor (1-CSTR) model, and the reactor with the partition was simulated by using the sequential CSTR model. Through model calibration, the decomposition rate constants and reactor efficiencies for the removal of TCE and PCE were evaluated. The results suggest that the combined effect of UV and US on the decomposition of TCE and PCE is synergistic in both the simultaneous and sequential UV/US modes, that the rate constants of sonolysis and photolysis are greater with the sequential combination than with the simultaneous combination, and that overall efficiency is higher for the reactor with the partition than for the one without it.     

Visual and auditory spatial and nonspatial delayed-response performance by Korsakoff and non-Korsakoff alcoholic and aging individuals.

36 male alcoholics (13 with Korsakoff's syndrome) and 24 controls performed visual and auditory delayed-response tasks sensitive to prefrontal cortical damage in nonhuman primates. Korsakoff patients were consistently impaired compared with other Ss. Impairments by Korsakoff patients were evident when demands were placed on visual processing time (brief stimulus durations), and the deficits became exaggerated with increased demands on short-term memory. Under the most difficult experimental conditions, controls and non-Korsakoff alcoholics who were over 50 yrs old performed somewhat worse compared with younger groups 27–49 yrs old. Age-linked deficits were mild compared with Korsakoff's deficits, and age-group differences disappeared with easier task demands. The results implicate cortical pathology in alcoholism and normal chronological aging and suggest that prefrontal damage accompanies Korsakoff's syndrome. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Homogenization and Recrystallization of Al-6Mg Alloys with and without Sc and Zr

ДрицМ .Е .[1,2 ] reportedthatscandium ,com paringwiththeotherrareelements ,isthemosteffec tiveadditiontopromotethestrengthofaluminumal loys .Thestrengthofas extrusionAl 6 5Mgalloyrodcontaining 0 .2 %Screaches 4 0 0MPa (σb)and 2 5 0MPa (σ0 .2 ) ,higherthanAl 6 5Mgalloywithoutscandiumonetime .Willey[3] fromAluminumCompa nyofAmericapatentedthefirstaluminumscandiumalloyin 1971.Since 70′soflastcentury ,theformerSovietUnionengagedcompletelyresearchonthepro ductionandapplicationofalum…     

Suicide and gambling: Psychopathology and treatment-seeking.

The aim of this study was to evaluate suicides with a history of problem gambling (PG) and others with no such history (NPG) and to compare the two on mental health problems and service utilization. Data on a sample of 49 PG suicides and 73 NPG suicides were obtained from informants and hospital records. Psychopathology was prevalent in both groups, but problem gamblers were twice as likely to have a personality disorder. Moreover, PG suicides were less in contact with mental health services in their last month, their last year, and their lifetime. NPG suicides consulted specialized services from 3 (last month and last year) to 13 times (lifetime) as often as their PG counterparts. Lower service utilization associated with PG suicides argues in favor of stepping up detection, engagement in care and treatment with respect to problem gambling, especially when comorbidity is present. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Synthesis and analysis of mixed chlorinated-fluorinated dibenzo-p-dioxins and dibenzofurans and assessment of formation and occurrence of the fluorinated and chlorinated-fluorinated dibenzo-p-dioxins and dibenzofurans

Despite the use of multimodal therapy, higher-grade glioma is still uniformly fatal in the adult population. There is a considerable difference between the length of survival in each given patient, even within the same tumor type and malignancy grade group, suggesting that there are factors that might differentially influence outcome. To identify such factors, 107 patients with anaplastic or malignant glioma were retrospectively investigated. Clinical parameters and paraclinical data on the p53, mdm2, and EGFR genes at the DNA or protein level were evaluated by univariate analysis and Cox proportional hazards regression modeling. Kaplan-Meier survival estimation demonstrated that immunohistochemical positivity for mdm2 protein in patients with anaplastic astrocytoma or with glioblastoma multiforme was associated with a shorter survival time (p = 0.02). P53 gene mutations and immunopositivity for the epidermal growth factor receptor (EGFR) protein were not significantly related to poor prognosis. The Cox proportional hazards model revealed immunohistochemical positivity for p53, mdm2, or for both of them, the presence of postoperative irradiation, and the extent of surgical resection of tumor to be variables significantly associated with prolonged survival. EGFR overexpression, age over 60 years, and Karnofsky performance score below 40 points did not significantly shorten survival time. In conclusion, the present study identified immunohistochemically detected mdm2-protein overexpression as a statistically significant negative prognostic parameter in patients bearing anaplastic or malignant glioma. Association analysis of variables revealed a possible correlation between mdm2 and p53, which is also consistent with the biological interaction mode of both proteins in vivo.     

橡胶膜密封煤气柜与稀油密封煤气柜技术经济分析及比较

从15万m3高压橡胶膜密封煤气柜的特点出发,与同容积的稀油密封圆形煤气柜进行技术经济分析比较,分析两种柜型的优缺点,指出两种柜型的适用范围。     

MSO萃取分离铂铱的工艺研究

采用一种新的萃取剂MSO对含铂、铱料液进行了萃取分离的工艺研究。首先该料液用FeSO4还原预处理，之后再加人NaCl饱和，最后采用30％MSO经三级逆流萃取、一级洗涤、三级错流反萃Pt，一级再生MSO的流程，得到Pt的直收率94．1％，总回收率达到94．5％，铱则留在萃余液中，实现了两种金属的有效分离。     

Vascular health and longitudinal changes in brain and cognition in middle-aged and older adults.

The impact of vascular health on the relations between structural brain changes and cognition was assessed in a longitudinal study of 46 adults, 23 of whom remained healthy for 5 years and 23 of whom had hypertension at baseline or acquired vascular problems during follow-up. At both measurement occasions, the volume of white matter hyperintensities (WMH) and regional brain volumes correlated with age. In 5 years, WMH volume more than doubled in the vascular risk group but did not increase in healthy participants. The frontal lobes had the highest WMH load at baseline and follow-up; the parietal WMH showed the greatest rate of expansion. In the vascular risk group, systolic blood pressure at follow-up correlated with posterior WMH volume. The fastest cortical shrinkage was observed in the prefrontal cortex and the hippocampus. Fluid intelligence correlated with WMH burden and declined along with faster WMH progression. In the vascular risk group, WMH progression and shrinkage of the fusiform cortex correlated with decline in working memory. Thus, poor vascular health contributes to age-related declines in brain and cognition, and some of the age-related declines may be limited to persons with elevated vascular risk. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Serotonergic function and negative and depressive symptomatology in schizophrenia and major depression

BACKGROUND: Serotonergic abnormalities are found in both major depressive disorder (MDD) and schizophrenia. Depressive symptoms commonly occur alongside the negative or defect symptoms in schizophrenia and antiserotonergic drugs may be particularly effective in their treatment. We wished to explore whether these symptoms could be distinguished biologically by directly comparing serotonergic function in these two illnesses. METHOD: Fifteen patients with MDD and 13 patients with schizophrenia underwent testing with the specific serotonin releasing agent D-fenfluramine (D-FEN). Prolactin and cortisol responses were measured to ascertain central serotonergic function. Individual patient results were compared with their own carefully matched control to correct for the effect of age, sex, weight and menstrual cycle, before the two patient groups were then compared. RESULTS: Prolactin responses differed significantly between the two patient groups, being lower in MDD patients and higher in schizophrenia patients than their individually matched controls. Cortisol responses did not differ. Within the schizophrenia group, increased serotonergic function correlated positively with depressive symptoms, but there was no such correlation with defect symptoms. Depressive scores were negatively correlated with the presence of negative symptoms in the schizophrenic group. CONCLUSIONS: Schizophrenia and MDD have distinct and opposite neuroendocrine responses to D-FEN. There is no evidence that depressive symptoms in these two conditions have a common serotonergic basis. Moreover, these responses distinguished between negative and depressive symptoms in our schizophrenic group.