中国裸背寄蝇属二新种记述（双翅目：寄蝇科）

本文记述我国发现的裸背寄蝇属Ｉｓｔｏｃｈａｅｔａ Ｒｏｎｄａｎｉ２新种,长尾裸背寄蝇Ｉｓｔｏｃｈａｅｔａ ｌｏｎｇｉｃａｕｄａ Ｌｉａｎｇ ｅｔ Ｃｈａｏ和聂拉木裸背寄蝇Ｉｓｔｏｃｈａｅｔａ ｎｙａｌａｍｅｎｓｉｓ Ｃｈａｏ ｅｔ Ｌｉａｎｇ并附特征图。     

中国丛毛寄蝇族一新属新种记述（双翅目：寄蝇科）

本文记述寄蝇科丛毛寄蝇族一新属,类梳寄蝇属Ｉｓｏｐｅｘｏｐｓｉｓ ｇｅｎ．ｎｏｖ．一新种,侧颜类梳寄蝇Ｉ．ｐａｒａｆａｃｉａｌｉｓ ｓｐ．ｎｏｖ．,并绘制了相应的特征图,模式标本保存于中国科学院动物研究所。     

山西省寄蝇科五新种记述(双翅目)

本文记述了山西省寄蝇科５新种,即翼城侧盾寄蝇ＰａｒａｔｒｙｐｈｅｒａｙｉｃｈｅｎｇｅｎｓｉｓＣｈａｏｅｔＬｉｕ,ｓｐ．ｎｏｖ,短爪尼里寄蝇ＮｉｌｅａｂｒｅｖｉｕｎｇｕｉｓＣｈａｏｅｔ．Ｌｉ．ｓｐ．ｎｏｖ翼城芙蕊寄蝇ＰｈｒｙｏｎｙｉｃｈｅｎｇｉｃａＣｈａｏｅｔＬｉｕ．ｓｐ．ｎｏｖ亮黑凹面寄蝇ＢｏｔｈｒｉａｃｌａｒｉｎｉｇｒａＣｈａｏｅｔＬｉｕ,ｓｐ．ｎｏｖ和山西广颜寄蝇Ｅｕｒｉｔｈｉａｓｈａｎｘｉｅ     

中国金绿寄蝇属记述：双翅目：寄蝇科

金绿寄蝇属Chrysocosmius在全世界已记载5种(古北界3种,东洋界2种),本文报道我国7种,其中包括4新种和2中国新纪录。新种为:巨眼鬃金绿寄蝇Chrysocosrmius ocellosetus,单鬃金绿寄蝇Chr.monostus,双齿金绿寄蝇Chr.bidentatus,亚合眼金绿寄蝇Chr.euholopticus。本文还编有种检索表。     

中国鞘寄蝇属的研究（双翅目：寄蝇科）

鞘寄蝇属Thecocarcelia全世界已记载7种,本文报道我国6种,其中2个新种。新种为:毛斑鞘寄蝇Thecocarcelia hirtmacula,多径鬃鞘寄蝇Th. setula。本文还编有种检索表。     

中国锥腹寄蝇属研究(双翅目,寄蝇科)

系统地研究了我国寄蝇科中锥腹寄蝇属Smidtia Robinneau-Desvoidy的分类及其种类鉴定,记述了3新种和中国l新纪录种,并编制了我国7种锥腹寄蝇的检索表。新种是：长肛锥腹寄蝇S.longicauda、亮丽锥腹寄蝇S.candida和伊春锥腹寄蝇S.yichunica,中国新纪录种是：日本锥腹寄蝇S.japonica。     

中国噪寄蝇属二新种及三新纪录种(双翅目,寄蝇科)(英文)

噪寄蝇属Campylocheta隶属于双翅目寄蝇科长足寄蝇亚科Dexiinae噪寄蝇族Campylochetini,其幼虫一般寄生于鳞翅目夜蛾科和尺蛾科的幼虫;世界性分布。本属区别于其它近缘属的特征为:复眼具黄色密长毛;颜堤在下2/3或更多部分具鬃;单眼鬃发达,通常后倾;触角第3节长于第2节3倍以上,触角芒裸,在基部1/5～1/2变粗;前胸前侧片具密的淡色毛;背中鬃3+3;小盾端鬃强,交叉后伸;翅肩鳞黑色;前缘基鳞红黄色;腹部第1+2合背板无中缘鬃。本研究的腹噪寄蝇C.abdominalis、双鬃噪寄蝇C.bisetosa和毛颜噪寄蝇C.hirticeps为中国新纪录分布;褐脉噪寄蝇C.fuscinervis、马来噪寄蝇C.malaisei和巨尾噪寄蝇C.magnicauda为中国分布已知种;编制了中国本属8个种的检索表。首次描述了产自我国的2新种;新种模式标本及其它研究标本均保存于沈阳师范大学昆虫标本馆(SNU)。     

狭颊寄蝇属一新种记述（双翅目：寄蝇科）

本文中国发现的狭颊寄蝇属一新种宽属狭颊寄蝇。     

中国俏饰寄蝇族的研究（双翅目：突颜寄蝇亚科）

本文记述中国寄蝇科、突颜寄蝇亚科、俏饰寄蝇族中的3属7种,其中包括1新属、2新纪录属和5新种,2新纪录种。     

中国寄蝇科狭颊寄蝇属研究

综合研究中国狭颊寄蝇属73种的鉴别方法、分布、寄主种类;研究并发现一些种类的变异特点,♀、♂异型等现象;文中附有73种的检索表及特征图,15个新种的描述;订正了5种为新异名。重建了狭颊寄蝇属的分类系统。     

Site of graviperception in roots: a re-examination

Two lines of evidence have been cited to support the assertion that the root cap is the sole site of graviperception in the root. The first evidence is based on surgical removal of the cap, which abolishes the response to gravity. This is sufficient to conclude that the cap is involved in gravitropism, but not to conclude that the cap is the site of graviperception. The second is based on the results of centrifugation experiments, in which different parts of the plant are subjected to different centrifugal forces. The data from such experiments have been cited to support the conclusion that the perception of gravity is limited to the rootcap. However, these data actually support the conclusion that gravity is perceived throughout the root tip, and not only in the root cap. We believe that the data support the conclusion that the root cap is involved in root gravitropism, but that there is inadequate evidence to conclude that the cap is the sole site of graviperception.     

Neurophysiological mechanisms underlying face processing within and beyond the temporal cortical visual areas.

The ways in which information about faces is represented and stored in the temporal lobe visual areas of primates, as shown by recordings from single neurons in macaques, are considered. Some neurons that respond primarily to faces are found in the cortex in the anterior part of the superior temporal sulcus (in which neurons are especially likely to be tuned to facial expression and to face movement involved in gesture), and in the TE areas more ventrally forming the inferior temporal gyrus (in which neurons are more likely to have responses related to the identity of faces). Quantitative studies of the responses of the neurons that respond differently to the faces of different individuals show that information about the identity of the individual is represented by the responses of a population of neurons, that is, ensemble encoding rather than 'grandmother cell' encoding is used. It is argued that this type of tuning is a delicate compromise between very fine tuning, which has the advantage of low interference in neuronal network operations but the disadvantage of losing the useful properties (such as generalization, completion and graceful degradation) of storage in neuronal networks, and broad tuning, which has the advantage of allowing these properties of neuronal networks to be realized but the disadvantage of leading to interference between the different memories stored in an associative network. There is evidence that the responses of some of these neurons are altered by experience so that new stimuli become incorporated in the network. It is shown that the representation that is built in temporal cortical areas shows considerable invariance for size, contrast, spatial frequency and translation. Thus the representation is in a form which is particularly useful for storage and as an output from the visual system. It is also shown that one of the representations that is built is object based, which is suitable for recognition and as an input to associative memory, and that another is viewer centred, which is appropriate for conveying information about gesture. Ways are considered in which such cortical representations might be built by competitive self-organization aided by back projections in the multi-stage cortical processing hierarchy which has convergence from stage to stage.     

Cytoplasmic localization of the ORF2 protein of hepatitis E virus is dependent on its ability to undergo retrotranslocation from the endoplasmic reticulum

Hepatitis E virus (HEV) is a positive-strand RNA virus that is prevalent in much of the developing world. ORF2 is the major capsid protein of HEV. Although ORF2 is an N-linked glycoprotein, it is abundantly located in the cytoplasm in addition to having membrane and surface localization. The mechanism by which ORF2 protein obtains access to the cytoplasm is unknown. In this report, we prove that initially all ORF2 protein is present in the endoplasmic reticulum and a fraction of it becomes retrotranslocated to the cytoplasm. The ability of ORF2 to be retrotranslocated is dependent on its glycosylation status and follows the canonical dislocation pathway. However, in contrast to general substrates of the dislocation pathway, retrotranslocated ORF2 protein is not a substrate of the 26S proteasome complex and is readily detectable in the cytoplasm in the absence of any protease inhibitor, suggesting that the retrotranslocated protein is stable in the cytoplasm. This study thus defines the pathway by which ORF2 obtains access to the cytoplasm.     

酸性硫酸盐土中硫的形态含量分布和酸化特征

对广东省台山市南部滨海平原酸性硫酸盐土(以下简称ASS)S的形态、含量、分布和酸化特征的研究表明,ASS全硫含量高达0.615%,比咸田高2～6倍,比砂泥田高3～9倍;其硫以无机硫为主,占全硫的82.3%～90.4%,其中,黄铁矿硫的含量最高,占全硫的30.3%～46.2%,黄铁矿硫在剖面中的分布与全硫含量同步。ASS硫含量的空间变异和剖面内部的分异十分显着。ASS发育过程中,适合黄铁矿累积的环境及其持续时间与地形地貌(山)的关系十分密切。ASS的主要致酸物质是黄铁矿的氧化,酸化的ASS的pH一般在5.5以下,最低达2.83.ASS可氧化总酸度一般比实际总酸度高2～3倍,潜在的环境风险极.     

Dynamic Monte Carlo simulations of globular protein folding. Model studies of in vivo assembly of four helix bundles and four member beta-barrels

As part of an ongoing series of dynamic Monte Carlo simulations of globular protein folding, the nature of the folding pathway, of model four-member beta-barrels and four-helix bundles, under highly idealized conditions in vivo, has been examined. The ribosome is crudely modeled as an inert hard wall on to which the model protein chain is attached. Three cases are considered in detail. The first corresponds to post-translational assembly in which the fully synthesized chain is tethered to the wall and starts out under strongly denaturing conditions. The system is cooled down, and the chain is allowed to fold. Interestingly, the helical motif prefers to assemble parallel to the wall, whereas the beta-barrel, predominantly assembles with its principal axis perpendicular to the wall. In the former case, the dominant intermediate, the helical hairpin, is different from that in free solution, a three-helix bundle. The wall acts to reduce the expanse of configuration space that must be searched and aids in folding. Two situations that might lead to co-translational folding are also simulated. In the first case, to eliminate wall effects, the chain is slowly synthesized in free solution, and in the second case, it is slowly synthesized from the wall. In all cases, the chains are observed to fold post-translationally. While partially folded intermediates are observed during synthesis, they lack the stability to survive until chain synthesis is complete. The implications of these results for the folding in vivo of real protein chains is discussed, and a model of multiple domain protein folding is proposed.     

The yeast inositol-sensitive upstream activating sequence, UASINO, responds to nitrogen availability

The INO1 gene of yeast is expressed in logarithmically growing, wild-type cells when inositol is absent from the medium. However, the INO1 gene is repressed when inositol is present during logarithmic growth and it is also repressed as cells enter stationary phase whether inositol is present or not. In this report, we demonstrate that transient nitrogen limitation also causes INO1 repression. The repression of INO1 in response to nitrogen limitation shares many features in common with repression in response to the presence of inositol. Specifically, the response to nitrogen limitation is dependent upon the presence of a functional OPI1 gene product, it requires ongoing phosphatidylcholine biosynthesis and it is mediated by the repeated element, UASINO, found in the promoter of INO1 and other co-regulated genes of phospholipid biosynthesis. Thus, we propose that repression of INO1 in response to inositol and in response to nitrogen limitation occurs via a common mechanism that is sensitive to the status of ongoing phospholipid metabolism.     

INTRACELLULAR DISTRIBUTION OF ALKALINE PHOSPHATASE IN RAT LIVER CELLS

1. Cytochemical studies of the intracellular distribution of alkaline phosphatase in rat liver have been made, using a fractionation procedure recently developed in this laboratory (8) and a similar but modified method not described previously. Aqueous media were used in both cases. 2. The alkaline phosphatase was found to consist of two forms, one of which is strongly activated by magnesium and one of which is not sensitive to this metal. 3. The form of the enzyme that is not activated by magnesium occurs mainly in the nuclear fraction, where it seems to be rather firmly bound. Some of this form of the enzyme is also found in the microsomes, but very little if any occurs in the soluble supernatant fraction. 4. The form of alkaline phosphatase which is activated by magnesium occurs mainly in the soluble supernatant fraction, but what is believed are significant amounts also occur in nuclei. A significant portion of this form of the enzyme can be extracted from the isolated nuclei with cold, isotonic saline solution. Some activity of this form of the enzyme is also found in the microsomal fraction. 5. Mitochondria appear to contain relatively little alkaline phosphatase of either kind. 6. The concept of a porous nuclear membrane has been invoked to explain some of the results obtained in this work. It is postulated that part at least of the form of the enzyme that is activated by magnesium is free to diffuse back and forth through pores in the nuclear membrane, whereas this is considered not to be possible for the form of the enzyme that is insensitive to magnesium as a result of the firm binding of the latter to nuclear substance.     

The fate of di-(3,5-di-tert.-butyl-4-hydroxyphenyl)methane (Ionox 22) in the rat

1. A large proportion of a single oral dose of [(14)C]Ionox 220 to rats is eliminated in 24 days: 89.3-97.4% of the label is excreted in the faeces (much of this is eliminated in the first 4 days after dosage), 1% in the urine and less than 0.1% in the expired gases; 4.06% of (14)C is present in the carcass and viscera after removal of the gut, and most of this is in the fatty tissues. 2. About 87% of (14)C in the faeces is due to unchanged antioxidant, 5% to the quinone methide, 5% to the free acid and 3% to an unidentified polar constituent. Three-fifths of (14)C in the urine is due to 3,5-di-tert.-butyl-4-hydroxybenzoic acid and the remainder to the ester glucuronide. In three individual animals, one-half of (14)C in the bile is due to the free acid, one-quarter to the ester glucuronide and the remainder to unchanged antioxidant, whereas in another all of (14)C in the bile is due to Ionox 220. About 97% of (14)C in the body fat is due to unchanged antioxidant and the remainder to the free acid. 3. Up to 20% of a single oral dose of Ionox 220 is absorbed in rats: 13-14% is metabolized. 3,5-Di-tert.-butyl-4-hydroxybenzoic acid accounts for just over 5% of a dose of Ionox 220, 3,5-di-tert.-butyl-4-hydroxybenzoyl-beta-d-glucopyranosiduronic acid for less than 0.4%, the quinone methide for just over 5% and an unidentified compound for less than 3%. 4. The physiological and biochemical implications of ingesting Ionox 220 are discussed.