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Search Results: 1 - 10 of 32601 matches for " Mingguang Huang "
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The Financial Accounting Reform in the New Social Economic Environment
Mingguang Huang,Weiliang Song
International Journal of Business and Management , 2009,
Abstract: Along with WTO accession, China has gradually entered the world economy, there are greater changes inevitably in the social economic environment of China, and the change of the social economic environment will directly influence the development of the theory and practice of the accounting. This article made the analysis of which both the development of the change of the social economic environment and the influence of the financial accounting, then emphasized three ways from which the improvement of the accounting legal system, the specification of the financial report and the intensification of the accounting information processing, to discuss the directions of the financial accounting reform.
The 3D Computer Image of the Anterior Corneal Surface  [PDF]
Bo Wang, Xueping Huang, Jinglu Ying, Mingguang Shi
Engineering (ENG) , 2013, DOI: 10.4236/eng.2013.510B098
Abstract:

In this paper,we derive a nonlinearequation of corneal asphericity (Q) usingthe tangential radius of curvature (rt) on every semi-meridian. We transform the nonlinear equation into the linear equation and then obtain theQ-value of cor-neal semi-meridianby the linear regression method.We find the 360 semi-meridional variation rule of theQ-value us-ing polynomial function. Furthermore, we construct a new 3D corneal model and present a more realistic model of shape of the anterior corneal surface.

Native Expanding Merremia boisiana Is Not More Allelopathic than Its Non-Expanding Congener M. vitifolia in the Expanded Range in Hainan  [PDF]
Qiaoqiao Huang, Yide Shen, Zhiwei Fan, Mingguang Li, Hanting Cheng, Xiaoxia Li
American Journal of Plant Sciences (AJPS) , 2013, DOI: 10.4236/ajps.2013.44096
Abstract: Exotic invaders may possess novel biochemical weapons that native plants do not have, and these novel biochemical weapons may be more allelopathic than those from native plants to other native competitors. During range expansion, native species also encounter many new plant competitors. Thus, allelochemicals from native expanding species may also be more novel and allelopathic than those from non-expanding species to other plant competitors in the expanded range. We test this hypothesis using the native expanding Merremia boisiana and its non-expanding congener M. vitifolia in year 2012 inthe expanded range inHainan. In petridish bioassays, we found that aqueous extracts of M. boisiana leaves were often less inhibitory or more stimulatory to seed germination and seedling growth of five vegetable species than those of M. vitifolia leaves. In pot culture, we also found that aqueous leaf extracts of the two congeners could both inhibit the growth of a naturally co-occurring plant Paederia scanden, but their effects did not differ from each other. These results indicate that while allelopathy may contribute to the competitive ability of M. boisiana, it may not act as a novel weapon explaining its success in the expanded range in Hainan.
Evidence for transmission of aphid-pathogenic fungi by migratory flight of Myzus persicae alates
Chun Chen,Mingguang Feng
Chinese Science Bulletin , 2002, DOI: 10.1360/02tb9431
Abstract: The alates of the green peach aphid, Myzus persicae, were daily trapped from the air from late October through early January and carried to laboratory for determination of fungal infection by individually rearing them for 7 d on detached cabbage leaves in Petri dishes. Among 760 alates trapped, 266 (35%) were found carrying various fungal pathogens, 87.3% of them died due to mycosis during the first 3-day period of rearing and the rest died in the following two days. Most of the deaths of the alates were attributed to entomophthoralean fungi, taking 94.4%, and the rest were the hyphomycetous fungus Beauveria bassiana. Among the Entomophthorales-killed alates, P. neoaphidis took a proportion of 66.1%, Z. anhuiensis 22.6%, E. planchoniana 9.7%, and N. fresenii 1.6%, respectively. Two alates were found suffering from cross infection of two fungal species, i.e. P. neoaphidis with Z. anhuiensis and N. fresenii, respectively. The results represent the first report on transmission of aphid-pathogenic fungi by M. persicae alates through migratory flight.
Observation on the initial inoculum source and dissemination of Entomophthorales-caused epizootics in populations of cereal aphids
Chun Chen,Mingguang Feng
Science China Life Sciences , 2004, DOI: 10.1360/02yc0261
Abstract: A total number of 1092 migratory alates were trapped from air in wheat grown area of Yuanyang County, Henan Province from early April through May 2002 in order to confirm the source and dissemination of entomophthoralean inocula to cause epizootics of cereal aphids. Those included 415 Sitobion avenae, 642 Rhopalosiphum padi, 22 Metopolophium dirhodum, and 13 Schizaphis graminum. The trapped alates were daily collected and individually reared for 7 days on wheat plants in laboratory. Of those 341 alates died of fungal infection, taking 31.2% in the trapped alates. These included 224 S. avenae, 106 R. padi, 8 M. dirhodum, and 3 S. graminum. Deaths of all infected alates occurred during the first 5 days and 78.9% of the deaths occurred within the first 3 days. Individual examination under microscope proved that all deaths were attributed to entomophthoralean fungi. Of those Pandora neoaphidis accounted for 84.6%, Conidiobolus obscurus for 9.9%, and Entomophthora planchoniana for 5.5%. Four alate deaths died of cross infection of P. neoaphidis and C. conidiobolus. Based on the high infection rate of the migratory alates trapped from air and the field occurrence of epizootics in populations of cereal aphids during the trapping period, Entomophthorales-caused epizootics were likely disseminated by infected alates through their flight and colonization. This makes it reasonable to interpret worldwide distribution of aphid epizootics, particularly caused by P. neoaphidis that has no resting spores discovered.
Ovicidal activity of two fungal pathogens (Hyphomycetes) againstTetranychus cinnabarinus (Acarina: Tetranichidae)
Weibin Shi,Mingguang Feng
Chinese Science Bulletin , 2004, DOI: 10.1007/BF03182810
Abstract: The carmine spider mite,Tetranychus cinnabarinus, is an economically important pest that devastates varieties of crops worldwide and develops significant resistance to common chemical pesticides, most of which lack ovicidal activity. In the present study, two isolates of entomopathogenic fungi,Beuaveria bassiana SG8702 andPaecilomyces fumosoroseus Pfr153, were bioassayed againstT. cinnabarinus eggs at 25 °C under a photophase of 12:12 (L:D). Infected eggs onVicia faba var.minor leaves failed to hatch due to distortion and shrinkage and had fungal outgrowths when maintained under moist conditions. Sprays ofB. bassiana conidia toT. cinnabarinus eggs (on leaves) at the concentrations of 58, 298 and 1306 conidia/mm2 (3 replicates per concentration and 35–65 fresh mite eggs per replicate) resulted in corrected egg mortalities of 20.4±4.2%, 36.0±7.6% and 64.6±12.5% (F=43.14,P <0.01), respectively; sprays ofP. fumosoroseus at 129, 402 and 2328 conidia/mm2 caused egg mortalities of 16.1±11.1%, 44.2±13.3%, and 63.4±11.7% (F= 15.37, P=0.01), respectively. In contrast, natural egg mortalities in blank controls were 7.8% and 10.3% only. Based on probit analysis, the estimates of LC50 with 95% confidential limits were 548 (393–858) conidia/mm2 forB. bassiana and 914 (625–1550) forP. fumosoroseus, respectively. Apparently, both fungal species were capable of infectingT. cinnabarinus eggs, but the ovicidal activity of theB. bassiana isolate was greater than that of theP. fumosoroseus isolate. This represents the first report on the ovicidal activity of the two entomopathogenic Hyphomycetes againstT. cinnabarinus.
Biological aspects on the cultures of the entomophthoralean fungusPandora delphacis grown on broomcorn millets
Mingguang Feng,Yong Liang
Chinese Science Bulletin , 2003, DOI: 10.1007/BF03184061
Abstract: A novel method was developed to use glutinous broomcorn millets (Panicum miliaceum L.) as solid substrate to make cultures of the entomophthoralean fungusPandora delphacis specifically pathogenic to planthoppers, leafhoppers and aphids. Steamed millets with water content of 45% were inoculated with a liquid culture ofP. delphacis at a ratio of 20% (v/w) and then incubated at 25°C and L:D 12:12. The millets cultured for 3–17 d exhibited high potential for conidial production. The 5-d-old millet culture sporulated most abundantly, discharging up to 17.12 (±1.31) × 104 conidia/ millet. The cultures incubated for 7–11 d also had a satisfactory sporulation capability, yielding 13.00–13.90 × 104 conidia/millet. Compared to 2.32 (±0.34) × 104 conidia discharged from each ofMyzus persicae adults killed byP. delphacis and a ≤60-h duration of sporulation, each of the millets cultured for 5–11 d produced 5.6–7.4 times more conidia with an over doubled duration for conidial discharge (144 h). Among 106M. persicae adults exposed to the shower of conidia discharged from the cultured millets, a total mortality of 69.8% caused byP. delphacis infection was observed within 7 d after exposure, but no death was attributed to the fungal infection in the aphids unexposed. The results indicate that the millet cultures ofP. delphacis are biologically similar to aphid cadavers killed by the same fungus. Due to the superiority of the cultured millets to the cadavers in sporulation potential and duration, the method for making cultures ofP. delphacis on the broomcorn millets is highly recommended for use in study of entomophthoralean fungi for microbial control. This is the first report on the success of the solid culture ofPandora species on cereals.
OPTIONAL PLANS OF BINOMIAL SEQUENTIAL CLASSIFICATION SAMPLING FOR MANAGEMENT DECISION MAKING OF THE ENGLISH GRAIN APHID (HOMOPTERA: APHIDIDAE):VALUE OF TALLY THRESHOLDS OF APHIDS IN SAMPLE UNITS
麦长管蚜的序贯二项式分类抽样设计与管理决策优化:样本单位虫口数阈的重要性

FENG Mingguang,
冯明光

生态学报 , 1996,
Abstract:
RELIABILITY OF EXTRACELLULAR PROTEASE AND LIPASEACTIVITIES OF BEAUVERIA BASSIANA ISOLATES USEDAS THEIR VIRULENCE INDICES
胞外蛋白酶和脂酶活性作为球孢白僵菌毒力指标的可靠性分析

Feng Mingguang,
冯明光

微生物学报 , 1998,
Abstract: The extracellular protease and lipase activities of 17 Beauveria bassiana isolates from different hosts and countries were evaluated for the reliability for the indices of their virulence to the migratory grasshopper, Melanoplus sanguinipes. Virulence assay of each isolate included about 30 10-d-old grasshoppers receiving topical inoculation with the suspension of 10(7) conidia/ml. In the assays of the enzymes, N-succinyl-Ala-Ala-Pro-Phe-p-nitroanilide and p-nitrophenyl palmitate were used as a substrate to measure the activities of protease (3 replicates) and lipase (4 replicates) in the filtrates of gelatin-based and sunflower oil-based liquid cultures of each isolate, respectively. Varying among the isolates assayed, the estimates of LT50's, protease units (PU), and lipase units (LU) were 5.27-16.89 d, 0.47-3.37 x 10(-2) mumol.ml-1.min-1, and 0.00-56.75 mumol.ml-1.h-1, respectively. Regression analysis revealed that PU was significantly (P < 0.01) correlated to the daily cumulative mortality of M. sanguinipes 5-17 d after inoculation and the LT50's whereas LU had little correlation to either the mortalities or the LT50's (P > 0.10). Based on the determination coefficients (r2) from the regression, PU alone interpreted at most 67% of the variation in the mortality 7d after inoculation but less than 50% in most of the days considered and only 38% in LT50's. Thus, the author suggested that PU could be used as virulence index only for early-stage selection of candidate isolates in large quantity and could not entirely replace conventional virulence assay method that remains most reliable.
On Correct Use of Slant "/"
斜线号“/”用法辨析

Chen Mingguang,
陈明光

中国科技期刊研究 , 2000,
Abstract: 斜线号广泛应用于科技文章及各类应用文中,是一种常用的标号.它有多种用法,本文就斜线号几种常见用法加以举例说明,并指出斜线号用法上存在的一些问题.
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