热成型工艺的解决方案

成功的塑料热成型工艺解决方案,要求对加工工艺、模具设计、材料性能等因素进行全面综合分析。众多的热成型加工厂商往往只着眼于调整和改进工艺,以此来解决生产过程中所遇到的各种制品缺陷问题。其中采取的措施包括:试图延长加工循环周期、二次加工工序、或者通过改良设备装置     

Male-specific conversion of the host plant compound,myrcene, to the pheromone, (+)-ipsdienol,in the bark beetle,Dendroctonus brevicomis

When both sexes of the bark beetle,Dendroctonus brevicomis LeConte, were exposed to vapors of myrcene from ponderosa pine, only the male produced (+)-ipsdienol. In the field, racemic ipsdienol significantly reduced the attraction of both sexes in flight to a mixture of myrcene and the aggregation pheromones,exo-brevicomin and frontalin. This suggests that ipsdienol may be involved in regulating colonization density ofD. brevicomis. The implications of the biosynthesis of various enantiomers of ipsdienol byD. brevicomis and the cohabitating bark beetles,Ips paraconfusus andI. pini, in relation to their behavioral responses are discussed in regard to reducing interspecific competition.Coleoptera: Scolytidae.     

电镀污泥中铜、镍、铬、锌的回收利用研究

研究电镀污泥中铜、镍、铬、锌的回收工艺流程,确定最佳的工艺条件。结果表明,电镀污泥中铜、镍、铬、锌的浸出率分别达到97.8%、98.6%、94.8%和99.0%,并可循环回收;废渣无害化,可按一般工业固废处置;生产过程闭路循环,无任何排放,实现清洁生产.     

老胡同，纽约客

Grifted安家在北京南锣鼓巷,它有个好听的中文名字：贵福天地。 和南锣鼓巷大多数小店一样,Grifted也是木质雕花油漆大门,很有仿古做旧的感觉,推门进去却是另一片天地：浓墨重彩的玩偶、设计独特的T恤、各种各样色彩艳丽的包装纸,具有浓郁中国特色的雨具……全都由店主PP亲自设计并手工制作。     

Pheromone production by the bark beetle,Ips paraconfusus,in the nonhost,white fir

MaleI. paraconfusus confined to artificial entrance tunnels in white fir logs produced the pheromone compounds ipsenol and ipsdienol in their hindguts. The hindguts were attractive to females in a laboratory olfactometer and the male infested logs were attractive in field bioassay. The amount of pheromones produced and the amount of feeding and boring activity is much less in white fir than in ponderosa pine. There were no pheromones detected in the hindguts of recently emerged, unfed males.Coleoptera; Scolytidae.Research supported by the Rockefeller Foundation, an NIH training grant, USDA/SEA Regional Research Project W-110, and the USDA Forest Service.From a thesis submitted by J.S. Elkinton in partial satisfaction of the requirements for the PhD degree, University of California, Berkeley, California, 1979.     

Scent,sex, and the self-calibrating rat

We propose that one mechanism whereby male rats,Rattus norvegicus, might gauge the reproductive condition of a female is by calibrating a stable odor with an odor that fluctuates through her reproductive cycle. We provide behavioral and histological evidence in support of such a self-calibration model. Male rats sniffed frequently at various body zones of females, and the proportion of sniffs deployed to each zone varied with the females' reproductive condition and relatedness. The females' haunches received more sniffs than any other part of their bodies, irrespective of their relatedness or reproductive condition. Furthermore, males tended to sniff the haunch after sniffing the forequarters, as part of a sequence of sniffing along a female from forequarters to hindquarters. Histology of the skin sebaceous glands indicated that the secretory activity of glands in the haunch, but not those in the forequarters, changed during estrus. Therefore, male rats had the opportunity to judge a female's reproductive status by calibrating the odor of her haunch against that of her forequarters. Self-calibration could represent a means of accommodating differences in odor within individuals.     

技术攻关使企业效益显著——C902A／B的技术攻关

茂石化聚丙烯车间的C902A／B是用来输送颗粒到包装车间的罗茨风机,其设计能力为50t/h。自96年开车以来，其输送能力一直在20－25t/h，远远没有达到设计能力。98年经过长达两年的技术攻关，终于使风机C902A／B的正常使用时间缩短了一半，给生产带来了极大的方便。     

与时俱进跨越发展夯实基础提高质量--前进中的茂名学院

本文介绍了茂名学院2010年前的战略发展规划和办学方略。     

铝合金中硅、镁、铜、铁、锰元素的测定

铝合金常常用回收的废铝重新进入熔铸冶炼,而废铝中硅、镁的含量很低,为了达到铝合金的硬度和可塑性,便于挤压成型,需检测铝锭中硅、镁、铜、铁、锰元素的含量.采用分光光度法测定了工业生产过程铝合金中硅、镁、铜、铁、锰元素的含量.     

Fate of the Dietary Terpene, P-Cymene, in the Male Koala

The fate of the dietary terpene, p-cymene, is reported in a specialist Eucalyptus leaf folivore, the koala (Phascolarctos cinereus). Six male koalas were given two single oral doses of p-cymene (0.37 mmol/kg and 1.49 mmol/kg). Urine and feces were collected for two 24-hr periods after each dose and analyzed for metabolites by extraction, gas chromatography, and mass spectrometry. A total of six metabolites were detected in the urine. A novel, extensively oxidized metabolite, 4-(1,2-dihydroxy-1-methylethyl)-benzoic acid, was identified and its structure elucidated by high resolution and chemical ionization mass spectrometry. Minor amounts of two glycine conjugated metabolites were also detected. Five metabolites were present in sufficient amounts to quantify, using isolated urinary metabolites as reference standards. The mean fractional recovery of administered p-cymene was 0.77 ± 0.09 and 0.84 ± 0.12 for the low and high dose, respectively. The major metabolite excreted was the novel carboxy diol compound. No fecal metabolites were found. Thus, the koala employs a strategy in the metabolism of p-cymene that promotes the production of extensively oxidized metabolites that consequently have increased polarity and enhanced renal excretion. This strategy is compared with that employed by other Eucalyptus leaf folivores.     

Sequence,Expression, and Anti-GCRV Function of the Ferritin from the Grass Carp,Ctenopharyngodon idellus

Ferritin possesses an immune function to defend against pathogen infection. To elucidate the immunity-protecting roles of ferritin from Ctenopharyngodon idellus (Ciferritin) against virus infection, the cDNA and promoter sequences of Ciferritin were determined, and the correlations between Ciferrtin expressions and promoter methylation levels were analyzed. In addition, the functional role of Ciferrtin on GCRV (grass carp reovirus) infection was assessed. The full-length cDNA of Ciferritin is 1053 bp, consists of a 531 bp open-reading frame, and encodes 176 amino acids. Ciferritin showed the highest sequence identity with the ferritin middle subunit of Mylopharyngodon piceus (93.56%), followed by the subunits of Megalobrama amblycephala and Sinocyclocheilus rhinocerous. Ciferritin contains a conserved ferritin domain (interval: 10–94 aa), and the caspase recruitment domain (CARD) and Rubrerythrin domain were also predicted. In the spleen and kidney, significantly higher Ciferritin expressions were observed at 6, 12, 24, or 168 h post GCRV infection than those in the PBS injection group (p < 0.05). The Ciferrtin expression level in the progeny of maternal-immunized grass carp was significantly higher than that in the progeny of common grass carp (p < 0.05). Ciferritin promoter methylation level in the progeny from common grass carp was 1.27 ± 0.15, and in the progeny of the maternal-immunized group was 1.00 ± 0.14. In addition, methylation levels of “CpG9” and “CpG10” loci were significantly lower in the progeny of maternal-immunized fish than those in the common group. Except for the “CpG5”, methylation levels of all other detected “CpG” loci negatively correlated with Ciferritin expression levels. Furthermore, the total methylation level of “CpG1–10” negatively correlated with the Ciferritin expressions. The Ciferritin expression level was significantly up-regulated, and the VP7 protein levels were significantly reduced, at 24 h post GCRV infection in the Ciferritin over-expression cells (p < 0.05). The results from the present study provide sequence, epigenetic modification and expression, and anti-GCRV functional information of Ciferritin, which provide a basis for achieving resistance to GCRV in grass carp breeding.     

Raman spectroscopic determination of the length, strength, compressibility, Debye temperature, elasticity, and force constant of the C-C bond in graphene

From the perspective of bond relaxation and bond vibration, we have formulated the Raman phonon relaxation of graphene, under the stimuli of the number-of-layers, the uni-axial strain, the pressure, and the temperature, in terms of the response of the length and strength of the representative bond of the entire specimen to the applied stimuli. Theoretical unification of the measurements clarifies that: (i) the opposite trends of the Raman shifts, which are due to the number-of-layers reduction, of the G-peak shift and arises from the vibration of a pair of atoms, while the D- and the 2D-peak shifts involve the z-neighbor of a specific atom; (ii) the tensile strain-induced phonon softening and phonon-band splitting arise from the asymmetric response of the C(3v) bond geometry to the C(2v) uni-axial bond elongation; (iii) the thermal softening of the phonons originates from bond expansion and weakening; and (iv) the pressure stiffening of the phonons results from bond compression and work hardening. Reproduction of the measurements has led to quantitative information about the referential frequencies from which the Raman frequencies shift as well as the length, energy, force constant, Debye temperature, compressibility and elastic modulus of the C-C bond in graphene, which is of instrumental importance in the understanding of the unusual behavior of graphene.     

A Relationship Between the Heat of Vaporization,Surface Tension,and the Solubility Parameters,Which Includes the Ratio of the Coordination Numbers,Based on Stefan's Rule

The correct calculi of surface tension and solubility parameters are of paramount importance for many fields of chemical engineering and materials design, such as encapsulation methods (which use the mean field theory), dispersion of nanopowders, phase compatibility in chemical blends and nanocomposites, among others. The solubility parameters play a key role in these applications along with the surface tension. Until now, the relationship between solubility parameters and surface tension was only indirect, through the Skaarup–Beerbower formula, although well‐known physicochemical rules, such as Stefan's rule, could be applied to them directly, as shown in this study. The prediction of both the solubility parameters and surface tension within chemical groups can be obtained with high accuracy using critical temperature and molar volume, parameters easily found in the literature. The proposed rules are original, simple and have direct practical applications for the development of new materials. POLYM. ENG. SCI., 59:E312–E321, 2019. © 2018 Society of Plastics Engineers     

Distribution of the trace elements As,Cu, Ni,Be, and Sb in the combustion products of near-Moscow coals

The distribution processes of the trace elements As, Cu, Ni, Be, and Sb as the constituents of near-Moscow coal in the flow of coal combustion products with the excess oxidant (air) ratio α = 1.25 along the line of the P-59 boiler at the Ryazanskaya Thermal Power Plant was studied by simulation. The model proposed previously for the conversion of trace elements in the combustion of near-Moscow coals based on a complex approach combining the capabilities of geochemistry, chemical thermodynamics, phase analysis, and chemical kinetics was used with consideration for experimental data.     

在台北 在上海 在路上

在意大利,她得到时尚教父乔治&#183;阿玛尼的盛赞;在纽约,她被好莱坞巨星卡梅隆&#183;迪亚兹追问脚下鞋款的出处;在台湾,她设计的鞋子受到蔡依林等众多女明星的青睐;在上海,她的同名设计服装店正逐渐成为时尚名媛的私人衣橱……     

认清形势、把握机遇、落实规划、科学发展

各位嘉宾、各位代表、洗涤用品行业的朋友们：大家上午好!非常高兴到上海参加“第29届中国洗涤用品行业年会”,与各位同仁欢聚一堂,共同研讨轻工和日化工业的科学发展问题。在此,我谨代表中国轻工业联合会,对本次大会的成功召开表示热烈的祝贺,并向多年来奋斗在洗涤用品行业第一线并坚持创新发展作出突出贡献的各位企业家及全体职工表示诚挚的问候和崇高的敬意!     

Identification, Synthesis, and Field Testing of the Sex Pheromone of the Citrus Leafminer, Phyllocnistis citrella

The citrus leafminer is an important vector of citrus canker in many of the major citrus production areas of the world. (7Z,11Z)-Hexadecadienal was reported as a sex attractant for this insect in the 1980s, based on trap catches during pheromone screening trials in Japan. However, attempts to reproduce this work in other areas of the world have not been successful. We report here that (7Z,11Z)-hexadecadienal is only one component of the pheromone, with the other critical component being the analogous trienal, (7Z,11Z,13E)-hexadecatrienal. Both compounds were identified in the effluvia from live female moths by coupled gas chromatography (GC)-electroantennography using nonpolar and polar GC columns, and the identifications were confirmed by comparisons of mass spectra with those of authentic standards. Stereoisomers of the two compounds, and a number of analogs, were synthesized to confirm the identifications. In field trials, neither compound alone was attractive to male moths, but blends of the two were highly attractive, with thousands of insects being caught per trial. Addition of the isomeric (7Z,11Z,13Z)-hexadecatrienal inhibited attraction to the two-component blend. Electronic Supplementary Material Supplementary material is available for this article at and accessible for authorized users. This paper and the preceding paper (Leal et al.) were submitted within a few days of each other. The editors and the authors agreed that they should be published in tandem.