通过阐述香樟应用、分布与适生环境、生物学特性,提出香樟育苗造林技术.

This study explored the effects of reactive nitrogen metabolites (RNMS) on natural-killer- (NK-) cell-mediated killing of K562 cells and the influence of RNM scavengers, such as tiopronin (TIP), glutamylcysteinylglycine (GSH), and histamine dihydrochloride (DHT), on reversing the suppressing effect of RNM. We administered exogenous and endogenous RNM in the NK + K562 culture system and then added RNM scavengers. The concentrations of RNM, TNF-β and IFN-γ, and NK-cell cytotoxicity (NCC) and the percentage of living NK cells were then examined. We found that both exogenous and endogenous RNM caused the KIR to decrease (P < 0.01); however, RNM scavengers such as TIP and GSH rescued this phenomenon dose dependently. In conclusion, our data suggests that RNM scavengers such as TIP and GSH enhance the antineoplasmic activity of NK cells.

This paper proposes a digital image watermark algorithm based on spread spectrum mechanism.It selects the pseudo random sequence modulation for the periodic sequence of continuation,and then encrypts.Taking into account the characteristics of human visual system,the positions and strengths of embedding into the original image which uses the same chip rate coefficients of the stationary wavelet transform domain are obtained.Selecting spread spectrum sequence determines the maximum coefficients of the wavelet transform domain and the key period sequence of watermark.Experimental results show that the algorithm has strong robustness.

Here in a co-cultivation system of natural killer (NK) cells and K562 cells, monocytes (MO) and/or interleukin (IL)-2/phytohemagglutinin (PHA) were administered. After MO were administered, reactive oxygen metabolites (ROM)/reactive nitrogen metabolites (RNM) productions increased, while tumor necrosis factor (TNF)-β/interferon (IFN)-γ levels and NK cell cytotoxicity (NCC) decreased, the changes of which after administering tiopronin (TIP) or glutamylcysteinylglycine (GSH) were opposite. In conclusions, the activated MO could inhibit the NK cell activity to kill K562 cell by secreting ROM and RNM. And TIP and GSH could scavenge both ROM and RNM to reverse the inhibitory effect of MO.

To recognize the limit of wavelet transform and the sensitive diversity of human visual system,an approach using a new edge detection algorithm based on wavelet packet and human visual system is proposed.Firstly,the median filtering is easy to remove image noise,and the denoising image is transformed by wavelet packet;The edge detection regions are by selecting the wavelet packet coefficients based on the characteristic of human visual model,and then use Log algorithm to select the zero-crossing;The detected edge image is obtained by reverse wavelet packet.The experimental results show that the algorithm compared with Roberts、Sobel、Prewitt and Laplacian of Gaussian edge detection algorithms not only agrees more with human's recognition,but also can get an even better application on some regions including abundant local details and some tiny areas that change.

An improved method of color image edge detection based on fuzzy entropy and BP neural network is presented.Firstly,the R、G、B of the color image are extracted and the combination of the three components is computed in the RGB color space.Through quoting fuzzy entropy,four information measures fuzzy entropy-based to describe the edge feature of color image are constructed and a feature vector is composed of the four measures components.Then through the training with the feature vector samples calculated from training images,the BP neural network acquires the function of a desired edge detector.Finally,the trained BP neural network is used for edge detection directly.The method is fully considered between the color components and their correlation in the color space.Besides,both the architecture and the training of BP neural network are simple.The experiment's result proves that this method has the strong retention capacity of details and is more sensitive to weak edge detection.

Ecological forest plays an important role in maintaining territory security.Nowadays,much ecological forest belongs to collectivity or individuals.There are many problems existing in the daily management of the forest.And it would have positive meaning for bringing them into government procurement.Analyze the feasibility of government procurement through ecology security sense,economy,finance,village class organizations and country status.And the principles of government procurement are easy first,implement by step,priority for publicity and education,enhance finance supervision and guiding peasants rich.This paper also provides some advice about the finance sources of the government procurement.

To explore the diversify of reactive nitrogen metabolites (RNM)/ reactive oxygen metabolites (ROM) and their influence on anti-K562 cell activity of NK cell during the monocytes respiratory burst.In the co-cultivation system of NK cells and K562 cells, mono-cytes or/and IL-2/PHA were administered, then the corresponding changes of RNM/ROM and TNF-β /IFN-γ production, as well as K562 cell inhibition rate (KIR) were observed.Besides, histamine dihydrochloride (DHT) and tiopronin (TIP) were administered in the culture system and the indexes above were observed again.After IL-2/PHA was administered in the cultivated systems mixing with NK cells and K562 cells as the E/T (NK/K562) ratio was 10/1, KIR increased gradually; after monocytes being appended as E/MO (NK/monocyte) ratio was 10/2, 10/5, and 10/10, RNM and ROM productions increased correspondingly, but TNF-β /IFN-γ production and KIR decreased.Controlling by K562 cells, the negative correlation coefficient of RNM to KIR exceeds that of ROM to KIR.After administering DHT and TIP, expecially TIP, the ROM production decreased but the TNF-β/IFN-γ production and KIR increased.Morover, TIP could decrease the RNM production but DHT failed.All the results suggest that monocytes could product a lot of ROM and RNM to degreded NK cells ac-tivity and disable NK cells in killing K562 cells, in which RNM may play more important role than ROM; TIP can reverse the depressant ef-fect of MO on NK cell by scavenging ROM and RNM.

The management is a specialfunction in the human society.So long as there exists the mutual relations and influences between one person and the othe person,the person and the society,the person and nature,the management is necessary.With the development of society,the managements have changed a lot and they can be found everywhere from the experienced one to the scientific one,from the invisible one to the visible one,from the economic one to the political one,military one,the scientific and technical one,the educational one and so on,have kept with the times and played an irrrplaceable role in the harmonious development of human society.In the ancient times of China,seeking a harmony was one of the most beautiful Realms and goals in the managemnet.The managers at that time tried to realize a kind of harmonious management through creating the harmonious relations between persons and between the person and the society.Today,while we are actively construcing our harmonious country and the harmonious world,what we need more is to understand the harmony in the management deeply and to make great efforts to fulfil a harmonious management.

This pathogen mainly survives the winter on the fallen leaf and the soil in the form of fruitbody or hypha.Conidia spread among forest through wind and rain and mainly invade from the natural orifice or wound on the back of the new leaf,and rely mainly on the natural orifice.The disease generally starts in the last ten days of April or early May,peak period generally appears in July and August,and gentle gradually in September,then the disease will stop developing in about mid-November.The emergence and development of the disease is closely related to local climatic conditions.To a great extent,the temperature,rainfall and relative humidity have determined the development degree of this disease.

患者,女性,48岁.无明显诱因发现无痛性右乳肿物2周,与月经无关,无明显其他伴随症状.