近扭颚螱属(Pericapritermes)一新种

我国已知近扭颚(尉虫)属Pericapritermes)Silvestri计有11种,其名录如下: Ltr.JJJ:MM 1.背崩近拉颚(尉虫)P.planiusculus Ping et Xu; 2.灰胫近扭颚(尉虫)P.fuscotibialis(Light); 3.古田近扭颚尉P.gutianensis Li et Ma; 4.扬子江近扭颚尉P.jangtsekiangensis(Kemner); 5.左斜近扭颚(尉虫)P.laevulobliquus Zhu et Chen; 6.多毛近扭颚尉P.latignathus(Holmgren); 7 近扭颚(尉虫)P.nitobei(Shiraki); 8.平扁近扭颚(尉虫)P.planiusculus Ping et Xu; 9.三宝近扭颚(尉虫)P.semarangi(Holmgren); 10.大近扭颚(尉虫)P.teraphilus Silvestri; 11.五指山近扭颚(尉虫)P.wuzhishanensis(Li); 作者最近在整理广西(区)产(尉虫)类标本时,发现一新种:合浦近扭颚(尉虫)P.hepuensisp.nov.,现介绍如下:合浦近扭颚(尉虫)Pericaprtermes hepuensis sp.nov. 兵(尉虫)(图A～D) 头部棕褐色;触角窝周围色稍深;上颚深赤褐色;触角色浅于头色,每节基部似比端部色深,前胸背板为浅棕黄色;中、后胸背板,腹和足为黄色。头部仅有少数较长毛,上唇端部有数枚短毛。     

中国螱类名汇修订

根据中国科学院上海昆虫研究所夏凯龄教授再次审校的意见,对《中国螱类名汇》中的一些属和种作一些增补和修订。一、原螱属Hodotermopsis中,仍分     

栖北网螱Reticulitermes Speratus(Kolbe)生活习性的观察

大连市目前仅发现一种白蚁,原称黄胸散白蚁,后更名为栖北网螱Reticulitermes Speratus(Kolbe)几年来对其羽化、纷飞、活动、危害,天敌等习性观察,现报导如下: 羽化:栖北网螱在当地九月已见有羽化,个别已脱翅,羽化期极不整齐。初羽化的长翅繁殖蚁,翅扭曲,有的折叠,初为白     

中国破坏建筑物木构件和建材的白蚁(螱)名录

白蚁(螱)对国民经济很多部门造成损失,在房地产业方面也不例外。对白蚁(螱)破坏建筑物木构件造成的损失做一大致的统计是很困难的。林树青(1986)据1984年对中国23个城市的调查,仅房屋建筑一项受白蚁危害的面积达2220万平方米,直接损失达人民币8亿元(按每平方米维修费人民币36元计算)。至于其它人单凭猜估所得出来的数字恐怕准确性、可靠性就差得多了。     

香港地区危害房屋建筑和农林作物的白蚁名录

香港地区位于我国广东省南部,属亚热带气候。在W. V. Harris(1963)报导香港所有的7种螱类:麻头砂螱Cryptotermes brevis(Walker)、台湾泌乳螱Coptotermes formosanus Shiraki。福建网螱     

种得口红点绛唇——口红花

口红花一般称芒毛苣苔,学名Aeschynanthus radicans,为苦苣苔科、芒毛苣苔属多年生草本植物。具附生性,常攀援于其他树上。茎分枝,垂挂而下。叶对生或3～4枚轮生,肉质或革质,披针形、卵形或椭圆形,全缘或有浅齿,绿至深绿色,长至10厘米。花顶生或着生叶腋,单生或簇生;萼短,5裂;花冠筒长,弯曲,2唇,常倾斜;上唇分裂,直立或反卷,下唇3裂,中裂向后弯;自     

华扭螱属(Sinocapritermes)一新种(等翅目:螱科)

1986年4月,作者在浙江省天目山自然保护区采集的一种扭(尉虫)族(Capritermitini)标本,原拟归入基扭(尉虫)属CoxocapritermesAkhtar,现见平正明和徐月莉(1986)发表的华扭(尉虫)属新属(Sinocapritermes),其属征如下所示: 1.兵(尉虫),头亮被毛适度至较密。头长     

贵州省螱类八新种(杆螱科、鼻螱科、螱科)

贵州省等翅目的种类据蔡邦华、陈宁生1964“中国经济昆虫志——第八册”蔡邦华,黄复生1980“中国白蚁”前、后记录仅台湾土(尉虫)(黑翅土白蚁)一种。徐春贵、龚才、平正明1986“贵州的等翅目”专辑中记述为5科,14属,51种(其中30个新种)由此可见,贵州省等翅目的种类相当丰富,仅次于云南、广东、广西、四川诸省,是我国组成等翅目区系中的重要省份之一。     

毒饵法灭治白蚁

在我国,白蚁(螱类)的分布很广。据各地的调查,至今为止,除黑龙江、吉林,内蒙古、青海、宁夏、新疆等省(区)尚未发现白蚁外,北自辽宁、北京、南达广东南海诸岛,东起台湾,西至西藏,都有白蚁的分布。白蚁(螱类)的一些种类可对国民经济的许多部     

几多植物名马蹄(下)

(六)马蹄金(Dichondra repens),别名荷包草、黄疸草、铜钱草、小挖耳草.为旋花科多年生匍匐性草本植物.茎细长,节节生根.单叶互生,圆形或肾形,先端钝圆或具微凹,全缘,背面密被贴生丁字形毛.花腋生,花萼5裂,花冠钟状,黄色,深5裂,裂片长圆状披针形.雄蕊5枚,着生于花冠裂间缺口处.子房2室,蒴果近球形,种子2粒,黄至褐色,被毛.     

香港网螱属(Reticulitermes)的研究(等翅目:螱科)

The present paper deals nine species of the genus Reticulitermes from HONG KONG, inwhich six species are new record. The key to species is given.All specimens are preserved separately in Nanjing Institute of Termite Control, Shanghai Institute of Entomology, Academia Sinica and Tai Lung Experimental Station, Agriculture and Fisheries Department, Hong Kong.     

香港新螱属(Neotermes)的研究(等翅目:木螱科)

The present paper deals with three species of the genus Neotermes from Hong Kong. They were found causing damage to living trees of Common Mango(Mangifera indica L. ),Loquat(Eriobotrya japonica) (Thund. )Lindl.,Rich Acacia (Acacia confusa Merr. =A. richii A. Br. )and Southern Magnolia(Magnolia grandiflora L. ). The key to species is given.All specimens are preserved spearately in Nanjing Institute of Termite control,Shanghai Institute of Entomology,Academia Sinica and Tai Lung Experimental Station,Agricultue and Fisheries Department,Hong Kong.     

Decay and termite resistance of plywood treated with various fire retardants

This study evaluated the ability of white and brown rot fungi and termites to decompose fire retardant-treated (FRT) or untreated-plywood by measuring mass loss. Plywood was manufactured using Ekaba (Tetraberlinia bifoliolata Harms.) veneers which were previously treated with either boric acid, borax, mono-ammonium phosphate (MAP), or di-ammonium phosphate (DAP). Plywood specimens were then subjected to fungal decay resistance tests performed according to Japanese Industrial Standard (JIS) A-9201 method using a brown-rot fungus, Fomitopsis palustris (Berkeley et Curtis) Murrill and a white-rot fungus, Trametes versicolor (L. ex Fr.) Quel. The specimens were also assayed against the subterranean termite, Coptotermes formosanus Shiraki to determine termite resistance. Boron and phosphorus chemicals used in the study increased the resistance of plywood panels against both fungal and termite attack. Plywood panels treated with boric acid and borax resulted in less mass losses when compared to MAP and DAP-treated specimens in decay and termite resistance tests.     

Host records of five species of Platygastrinae (Hymenoptera,Platygastroidea: Platygastridae) from the United States,with the description of two new species of Platygaster

Platygaster tephrosiae sp. nov and P. vaccinii sp. nov. are described, with host information for these and for three further species of Platygastrinae: Metanopedias eupatorii Buhl, Platygaster munita Walker, and Trichacis virginiensis Ashmead. Hitherto undocumented galls on Galium circaezans Michx., Tephrosia virginiana (L.) Pers., and Vaccinium angustifolium Ait. are illustrated.     

贵州省矿山地质环境评价

贵州省矿产资源丰富,但其矿山地质环境问题也日益突出。根据贵州省矿山地质灾害与地质环境调查资料,利用GIS技术,选取层次分析法(AHP)作为权值的确定方法,采用"模糊层次综合评价"方法开展矿山地质环境评价。评价结果与贵州省矿山环境现状吻合,可作为贵州省矿山地质环境综合治理的重要依据。     

CFD study on micro-environment around human body and personalized ventilation

A seated computational thermal manikin (CTM) with geometry of a real human body is used to study the micro-environment around human body with and without personalized ventilation (PV) system. Two novel evaluation indices, pollutant exposure reduction and personalized air utilization efficiency, are introduced. In the range of the personalized airflow rate from 0.0 to $\text{3.0}\text{l/s}$, the best inhaled air quality is achieved at the airflow rate of $\text{0.8}\text{l/s}$ in the numerical simulation, whereas in our earlier experiments this occurred at the maximum flow rate $\text{3.0}\text{l/s}$. Through detailed analysis of interaction between thermal plume around human body and personalized airflow, the mechanism of inhalation process becomes more perspicuous. Results from computational fluid dynamics (CFD) and experiment are compared and improvements of CFD simulation accuracy are recommended.     

Recycling algae to improve species control and harvest efficiency from a high rate algal pond

This paper investigates the influence of recycling gravity harvested algae on species dominance and harvest efficiency in wastewater treatment High Rate Algal Ponds (HRAP). Two identical pilot-scale HRAPs were operated over one year either with (HRAP_r) or without (HRAP_c) harvested algal biomass recycling. Algae were harvested from the HRAP effluent in algal settling cones (ASCs) and harvest efficiency was compared to settlability in Imhoff cones five times a week. A microscopic image analysis technique was developed to determine relative algal dominance based on biovolume and was conducted once a month. Recycling of harvested algal biomass back to the HRAP_r maintained the dominance of a single readily settleable algal species (Pediastrum sp.) at >90% over one year (compared to the control with only 53%). Increased dominance of Pediastrum sp. greatly improved the efficiency of algal harvest (annual average of >85% harvest for the HRAP_r compared with ∼60% for the control). Imhoff cone experiments demonstrated that algal settleability was influenced by both the dominance of Pediastrum sp. and the species composition of remaining algae. Algal biomass recycling increased the average size of Pediastrum sp. colonies by 13-30% by increasing mean cell residence time. These results indicate that recycling gravity harvested algae could be a simple and effective operational strategy to maintain the dominance of readily settleable algal species, and enhance algal harvest by gravity sedimentation.     

Properties of cement kiln dust concrete

This paper reports results of a study conducted to assess the properties of cement kiln dust (CKD) blended cement concretes. Cement concrete specimens were prepared with 0%, 5%, 10%, and 15% CKD, replacing ASTM C 150 Type I and Type V. The mechanical properties of CKD concrete specimens were evaluated by measuring compressive strength and drying shrinkage while the durability characteristics were assessed by evaluating chloride permeability and electrical resistivity. The compressive strength of concrete specimens decreased with the quantity of CKD. However, there was no significant difference in the compressive strength of 0 and 5% CKD cement concretes. A similar trend was noted in the drying shrinkage strain. The chloride permeability increased and the electrical resistivity decreased due to the incorporation of CKD. The performance of concrete with 5% CKD was almost similar to that of concrete without CKD. Therefore, it is suggested to limit the amount of CKD in concrete to 5% since the chloride permeability and electrical resistivity data indicated that the chances of reinforcement corrosion would increase with 10% and 15% CKD.     

Levels of essential and toxic elements in Porphyra columbina and Ulva sp. from San Jorge Gulf, Patagonia Argentina

Baseline concentration levels of As, B, Ca, Cd, Cr, Cu, Co, Fe, Mg, Mn, Mo, Ni, P, Pb, Se, V, and Zn were determined for Porphyra columbina and Ulva sp. collected from three locations along San Jorge Gulf, in Patagonia Argentina. Elements were quantified by inductively coupled plasma-optical emission spectrometry, with the exception of lead and cadmium in some samples which were determined by electrothermal atomic absorption spectrometry. Three stations with different exposure degree to human activities, Bahía Solano, the mouth of Arroyo La Mata stream and Punta Maqueda, were selected as sampling points. The results showed a wide range of metal retention capacity between the two studied species. Regarding the levels of pollutants found in the researched sites, Punta Maqueda seemed to be less influenced by anthropogenic activities than the other two sites except for Cd. Taking into account their toxicities seasonal variations in Pb and Cd levels were studied in both algae in Punta Maqueda. Maximum concentrations of Cd (9.8 microg g(-1) dry wt.) were observed in P. columbina during winter, and maximum levels of Pb (0.82 microg g(-1) dry wt.) were detected in Ulva sp. during summer. Legislative and health safety aspects were evaluated for Cd and Pb.