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1.
超声波辅助提取脱脂红松仁中水溶性多糖的研究 总被引：1，自引：0，他引：1
采用超声波辅助提取法对脱脂红松仁中水溶性粗多糖的提取工艺进行了研究.通过正交试验,分别考察了提取温度、液料比、提取时间及醇沉浓度4个因素对红松仁多糖提取率的影响,得出优化的工艺条件：提取温度为70℃,液料比为20：1,提取时间为40 min,醇沉浓度为80%,此条件下多糖的提取率为3.65%,平均含量为45.38%.结果表明,超声波辅助提取的效率和含量均优于传统热水浸提法,且具有提取温度低、时间短及效率高的优势. 相似文献
2.
The effect of seed oil of Korean pine (Pinus koraiensis) on the rats’ blood-fat and its anti-ageing function was studied for appraising the efficacy of the seed oil of Korean pine.
Sixty experimental rats were randomly divided into 5 groups (half males and half females in each group) as normal control
group, high fat diet control group, and three groups (Group 1 Group 2, Group 3) that were fed with feedstuff with the contents
of the seed oil of 2.0g/(kg·d−1), 4.0g/(kg·d−1) and 8.0g/(kg·d−1), respectively. The indexes such as superoxide dismutase (SOD), glutathione peroxidase (GSH-PX) and anti-oxidation capacity
(AOC) were measured by Reagent Kit method. It was found that the seed oil of the Korean pine could reduce the content of triglyceride
and improve SOD as well as GSH-PX activity in serum. These indexes of the rats in Group 2 fed with Korean pine seed oil of
4.0 g/(kg·d−1) reached the significant level and those of rats in Group 3 fed with the seed oil of 8.0 g/(kg·d−1) reached the extremely significant level. The results indicated the seed oil of Korean pine had function of regulating the
level of blood-fat and anti-ageing.
Biography: WANG Zhen-yu (1957-), male, Prof. in Forestry College, Northeast Forestry University, Harbin 150040, P. R. China.
Responsible editor: Zhu Hong 相似文献
3.
不同红松种源材质性状和生长性状的遗传变异 总被引：1，自引：0，他引：1
在东北林业大学帽儿山实验林场,选择了26个17年生红松种源实验林作为研究对象,进行了木材材质性状和生长性状的调查。材质性状包括解剖学性状和物理学性状。解剖学性状测试指标包括,管胞长度、管胞直径和管胞壁腔比。物理学性状指标测定了:生长轮宽度、晚材率和生长轮密度。生长性状方面调查了树高和胸径。统计分析结果表明:各项材质性状和生长性状指标在种源间均存在着显著差异,同时证明各项材质性状均受一定的遗传效应控制;红松的生长性状指标在不同种源间也存在着较大的变异,红松的树高和胸径也受遗传效应的控制;但是,多数材质指标表现为一定的以经向为主的地理变异规律,而红松的生长性状指标如树高和胸径均呈现出一定的纬向变异规律,无经向变异规律。图2表5参6。 相似文献
4.
Camptothecine (CPT) and hydroxycamptothecin (HCPT), two kinds of anti-cancer alkaloids, were extracted from Camptotheca acuminata leaves using homogenate extraction technology under different conditions such as the ratio of material to liquid, ethanol
concentration, and homogenate time. The optimum technology parameters for homogenate extraction of CPT and HCPT from C. acuminata leaves were determined as homogenate time at 8 min, ethanol concentration at 55% and the ratio of material to liquid at 1:15
(g:mL). By using the optimized parameters, we obtained 0.639‰ extraction rate for CPT and 0.437‰ for HCPT. The extraction
yields of CPT and HCPT extracted by homogenating technology were higher than those by other extractive methods, such as ultrasonic,
reflux, shaking in water bath. It is concluded that the homogenate extraction technology was an efficient method for extracting
CPT and HCPT from C. acuminata leaves, with characteristics of less extraction time and high yield.
Foundation project: This research was supported by National Key Technology R & D Program (grant no. 2006BAD18B04).
Biography: SHI Wei-guo (1970–), male, Ph. D. candidate in Northeast Forestry University, Harbin 150040, P. R. China.) 相似文献
5.
优良红松坚果型优树的选择方法(英文) 总被引：3，自引：0，他引：3
于1988-1998 年对长白山、小兴安岭和完达山地区天然红松林以及黑龙江省鹤岗地区人工红松林结实量进行了实地调查和测定。根据调查和测定数据，对红松结实特征，包括结实量、球果长度、球果数量、出种率，种子千粒重、种子产量、种子大小、种子空实率、球果虫害率、结实指数等，进行分析方差分析、多重比较和逐步回归，得出各项结实因子对结实量的贡献率，将球果长度、千粒重和出种率确定为优树选择的重要指标，然后采用加权系数法确定红松坚果型优树，并制订出天然红松林坚果型优树标准和红松人工林坚果优树标准。本项研究为建立红松坚果园选择优树提供了方法和标准。 相似文献
6.
Establishing evaluation index system for desertification of Keerqin sandy land with remote sensing data 总被引：2，自引：0，他引：2
科尔沁位于我国东北部,地处东北平原向内蒙古高原的过渡地带(42°41'-45°15'N,118°35'-123°30'E),是受荒漠化影响较重的地区。利用外业调查数据,依据地表形态和生态状况的变化,确定了植被盖度、裸沙地占地百分比和土壤质地3 项评价指标,并建立了基于遥感的科尔沁沙质荒漠化评价指标体系,其中裸沙地占地百分比用混合像元分解的方法获得。利用外业调查的数据对该指标体系进行验证,结果表明该指标体系适于研究区域的荒漠化评价。表4参11。 相似文献
7.
本文报道了分布于黑龙江省塔和地区的2个中国夜蛾科新记录种：北方纬夜蛾Atrachea japonica （Leech, 1889） 和暗绿丫金翅夜蛾Autographa macrogamma （Eversmann, 1842）,同时首次将以新种记述于韩国和台湾省的中文夜蛾Neustrotia rectilineata Ueda, 1987在大陆予以报道.对标本材料的外部形态特征、生殖器图片和世界性分布予以记述.所用标本材料收藏在东北林业大学林学院昆虫实验室. 相似文献
8.
ZHANGYu-hong YUTao WANGYang 《林业研究》2003,14(3):202-204
Betulin, which is a medicinal pentacyclic triterpene, is abundant in the bark of white birch (Betula platyphlly). The bark of birch was collected at Tayuan Forest Farm of Jiagedaqi, Heilongjiang Province in September 2000. Supercritical fluid extraction (SFE) that is a new separation technology has been used for the processing pharmaceutical and natural products. In this paper, the extraction of betulin from the bark of birch by supercritical CO2 extraction was studied. The authors investigated and analyzed a few parameters such as modifier dosage, extraction pressure and extraction temperature. The optimal extraction conditions showed that the modifier dosage used for per gram bark powder was 1.5 mL, the extraction pressure was at 20 Mpa, and the extraction temperature was at 55 ℃. The velocity of flow of liquid CO2 was at 10 kg/h. The pressure and temperature in separation vessel were at 5.5 Mpa and 50 ℃, respectively. 相似文献
9.
LIUYuan ZHANGWei TANGXiao-dong 《林业研究》2004,15(3):243-245
The paper extends an overview of the worldwided velopment of wildlife tourism, introduced the conception of wildlife tourism and its components, and analyzed the development of international wildlife tourism and its international trends. The sustainability of wildlife tourism, the protection of wildlife habitat, as well as the possible impacts of wildlife tourism development in China were discussed. 相似文献
10.
为改善室内人居环境,解决家具制作材料的异味问题,使用"主客观相结合评价方法",探究三聚氰胺贴面刨花板对室内环境的影响。该评价法基于数字定量的手段以及主观感知的方法,能够全面有效的鉴定板材对室内空气品质的影响。通过气相色谱-质谱-嗅觉测量技术在标准环境条件下(温度23℃、相对湿度40%),对三聚氰胺贴面刨花板释放的VOCs和气味进行研究。确定特征气味物质的同时,探究板材TVOC和气味的释放特性,对板材释放的VOCs和气味进行主客观综合性评价。结果表明:1)芳香族化合物和酯类为三聚氰胺贴面刨花板主要气味物质来源,芳香族化合物多呈现植物芳香,酯类物质多呈现为果香;2)不同气味特征化合物的气味强度和其浓度并没有直接的相关性,但是同一种气味特征化合物的质量浓度会一定程度上影响其气味强度的大小;3)随着时间的推移,三聚氰胺贴面刨花板中呈现气味特征芳香族化合物的释放相对减弱,醛酮类和酯类的释放相对增强;4)通过对本实验使用三聚氰胺贴面刨花板进行分析,发现酯类和醛酮类对人居环境影响较大;5)综合主客观因素,建议在使用前放置28 d以上的时间以减小对室内人居环境的影响。 相似文献
11.
为了探讨大兴安岭地区主要树种(樟子松、兴安落叶松、白桦和山杨)根际土壤氮素的富集程度和差异性,选用抖落法采集根际和非根际土壤样品,对其全氮、铵态氮与硝态氮含量特征进行研究。结果表明:1)4个树种根际土壤全氮含量5—10月波动在1.22～5.43 g·kg-1之间,最大值均在5月;根际土壤铵态氮和硝态氮分别波动在22.41～53.75 mg·kg-1和0.79～2.06 mg·kg-1之间,含量均在7、8月较低,且兴安落叶松根际土壤月平均铵态氮和硝态氮含量均为最高。2)研究区无机氮素以铵态氮为主,占95%以上;根际土壤全氮、铵态氮和硝态氮含量均显著(P <0.05)高于非根际土壤,分别高出101.77%、29.26%和9.07%;兴安落叶松根际土壤全氮富集率达101.25%,铵态氮、硝态氮富集率均最高为39.37%和15.34%;樟子松根际土壤全氮、铵态氮、硝态氮富集率分别为95.98%、34.86%和7.84%;白桦全氮的富集率最高为125.73%,铵态氮、硝态氮富集率为30.30%和7.31%;山杨根际土壤氮素富集率最小。3)根际土壤铵态氮与全氮、硝态氮均呈极显著正相关,而全氮与硝态氮之间相关性不显著。4)4个树种根际土壤对氮素养分含量均具有明显的正根际效应,其中针叶树种对无机氮素的富集能力强于阔叶树种,且兴安落叶松对氮素的富集能力最强。因此,在森林经营和调整林分结构时可适当调整兴安落叶松树种比例,以提高森林生产力。 相似文献
12.
落叶松幼苗在其人工林内难以更新。为探讨红皮云杉和青海云杉幼苗是否具有在落叶松人工林内成功定植并替代落叶松更新的潜力,采用红皮云杉和青海云杉幼苗在不同落叶松人工林(样地Ⅰ:1 300株·hm-2的平地,样地Ⅱ,660株·hm-2的平地;样地Ⅲ,330株·hm-2的平地;样地Ⅳ,660株·hm-2的坡地)下进行人工更新。结果表明:1)样地Ⅰ和样地Ⅱ更适宜红皮云杉和青海云杉幼苗的存活,且同一样地内,红皮云杉幼苗的成活率均高于青海云杉的;2)同一样地内,红皮云杉幼苗的地上生物量均高于青海云杉的,并且在样地Ⅰ和样地Ⅱ红皮云杉的地上生物量显著高于青海云杉的;3)在不同落叶松人工林样地,红皮云杉和青海云杉幼苗的1级根均有较好的外生菌根侵染;4)红皮云杉幼苗的1级根直径受环境影响较大,而青海云杉幼苗的1级根皮层厚度受环境影响较大。同一样地内,2种云杉幼苗的1级根解剖结构除在样地Ⅳ表现出明显的差异外,在其它样地基本无显著差异。红皮云杉和青海云杉幼苗均适宜在落叶松人工林内存活,但相对高密度的林分更适宜云杉幼苗的生长,且红皮云杉比青海云杉更具生长优势。 相似文献
13.
In production industry ofAuricularia auricular, the varieties quality is most important impact factor on output. For evaluating the early quality of the edible fungus,
9 varieties ofAuricularia auricular (Au9, CF09, CF05, 29, 916, chang10, chang7, Au.Japanese and 8808) were cultured on the medium consists of potato dextrose
agar (PDA) and sawdust to test their mycelium growth rate, endurance to high temperature, resistance to mildew, assimilation
of nutriment, and resistance to drought. The result showed that the mycelium of Chang 10, CF09, 29 and Au.Japanese varieties
had the eminent characteristics such as short lifespan, stronger assimilation of nutriment, and endurance to high temperature
and steady growth. These four varieties are determined as superiority varieties ofAuricularia auricular in accordance with the research results.
Foundation item: The research was supported by Science Fund of Northeast Forestry University (2004).
Biography: Li Ling (1964-), female, Engineer in Northeast Forestry University, Harbin 150040, P. R. China.
Responsible editor: Zhu Hong 相似文献
14.
SONG Fu-nan YANG Chuan-ping LIU Xue-mei LI Gong-bin 《林业研究》2006,17(1):13-16
The injury tolerance of cell plasma membrane and the correlative enzymes activities of plasma-membrane protection system in the Ulmuspumila leaves treated by nine concentrations （0.3%, 0.6%, 0,9%, 1,2%, 1.5%, 1.8%, 2,1%, 2.4%, 3.0%） of Na2CO3 and NaHCO3 mixtures were studied in a greenhouse of Northeast Forestry University, Harbin, China. The rate of electrolyte leakage （REL） and SOD （Superoxide dismutase） activity in leaves of different samples were determined. Results showed that the REL in leaves of U. pumila presented a slowly increasing trend at the salt concentrations less than 1.5%, which indicated that cell plasma membrane of U. pumila leaves had rather strong resistance to the injury of salt ion, and had a significant increase at the salt concentrations more than 1.5%. The SOD activities in leaves of U, pumila presented an increased trend at salt concentrations less than 1.5%, the growth of seedlings did not decline, and tress and leaves had no symptom of injury, while the salt concentrations exceeded 1.5%, SOD activities sharply decreased and REL increased promptly. 相似文献
15.
Development, manufacture and application of Beta-Cypermethrin aqueous capsule suspension 总被引：1，自引：0，他引：1
LANGZi-jian SUYuan-ji WANGZhi-ying ChenLi-ping 《林业研究》2004,15(3):218-222
The optimal formula of Beta-Cypermethrin aqueous capsule suspension was screened out through the experiment,preparation and manufacture of basic formulas, which has no sedimentation, suspended drops of oil, peels and agglomerating and the diameter of capsule is in range of 10-30μm, conformed to the technical requirement. The aftereffect of the 3.3% Beta-Cypermethrin aqueous capsule suspension which was manufactured according to the optimal formula was up more than 25 days. The experiments on controlling the larvae of Dendrolinmus superans Butler and the adults of Xylotrechus rusticus L were carried out with different concentrations of this chemical. The death rate reached 80% when 250 times solution of the chemical was sprayed on stem to control the larvae of D. superans. For control of the adults of X. rusticus, 200, 400 and 600 times solution of the chemical were applied and their control effects (death rate) reached 85.23%, 74.21% and 66.59% respectively. Two kinds of solution (200 times and 300 times) of the chemical were used to control the larvae of D. superans in large area, and the control effect for both concentrations was over 90%. 相似文献
16.
以白桦Betula platyplylla当年生播种苗为对象,采用L25(5~6)正交试验设计方法,进行了氮(N-尿素;1.965、1.310、0.764、0.655、0.382 g/株)、磷(P-过磷酸钙;0.847、0.564、0.329、0.282、0.164 g/株)、钾(K-硫酸钾;2.281、1.520、0.887、0.760、0.443 g/株)25种配比的养分添加试验。在生长季(8月上旬),在完全展开叶的不同区域(叶尖、叶中、叶基)测得叶片的气孔密度(SD)和净光合速率(P_n)、蒸腾速率(T_r)、气孔导度(G_s),评价白桦叶片不同区域SD和各项气体交换特征对不同养分配比的响应,并分析二者间关系。结果表明:1)白桦叶片的叶尖各项气体交换特征参数虽然明显大于叶中和叶基,但叶片不同区域SD相差不大;2)养分添加对叶片各区域的P_n和G_s均存在显著影响(P<0.05),并对叶中的SD影响显著(P=0.042);3)N、P以及N、P和K的交互作用(NP、NK、PK、NPK)对叶片各区域的P_n均有显著影响(P<0.05),尤以N处理对P_n影响较大;4)除白桦叶基的T_r受P处理影响显著外(P=0.048),其它各种处理对叶片T_r影响均不显著;5)N、P、K处理对叶片各区域G_s影响均不显著,但N、P和K的交互作用(NP、PK)对叶片各区域G_s影响显著(P<0.05);6)虽然N、P和K的交互作用(NP、NK、PK)对叶片各区域SD影响均不显著(P>0.05),但P、K、NPK处理对叶中SD影响均显著(P<0.05);7)白桦叶片各区域P_n与G_s间均呈极显著正相关关系,而SD与前述各项指标间却均呈不显著相关关系,表明白桦叶片不同区域气体交换特征存在差异可能是由于气孔密度以外的因素引起的;8)上述结果也说明进行叶片气体交换特征研究时应考虑同一叶片不同部位间的差异。 相似文献
17.
Control of Lymantria dispar L. by biological agents 总被引：1，自引：0，他引：1
The experiment on control ofLymantria dispar L by using different kinds of biological measures, including nuclear polyhedrosis virus (NPV) ofLymantria dispar L., BtMP-342, sex-attractant as well as botanical insecticide, was carried out in the forest regions of Inner Mongolia in
2003. Two concentrations (2.632×106 PIB·ml−1 and 2.632×107 PIB·ml−1) ofLymantria dispar L. NPV were sprayed on the 2rd-instar-larvae ofL. dispar and 70% and 77.8% control effect were obtained respectively. BtMP0-342 was applied to the 3rd- and 4th-instar larvae and
the control effect was around 80%. The sex-attractant provided by Canada Pacific Forestry Research Center also showed a good
result in trappingL. dispar adults. The self-produced botanical insecticide, which was extracted from a kind of poisonous plant distributed in Daxing'an
Mountains, China, exhibited a good control result in controlling the larvae ofL. dispar, and 82% mortality was observed when spraying primary liquid of the botanical insecticide on the 3rd–5th-instar-larvae in
lab.
Foundation item: This paper was supported by Natural Science Foundation of Heilongjiang Province (C0235) and Youth Foundation of Harbin City
(0061218024).
Biography: ZHANG Guo-cai (1964), male, Ph. Doctor Candidate, associate professor in School of Forestry, Northeast Forestry University,
Harbin 150040, P. R. China.
Responsible editor: Song Funan 相似文献
18.
为探究褐腐对木材电阻的影响,以落叶松为研究对象,用褐腐菌对木材试件进行了接种感染,然后测试了腐朽试件的电阻,观察了腐朽样品的微观结构和金属离子浓度,并分析了试件样品的主要化学成分。结果表明:1)褐腐后,木材电阻变化显著,特别是腐朽的初期;2)腐朽程度Es与电阻变化率Ed呈对数曲线关系,曲线回归模型中电阻变化率Ed和质量损失率Es高度相关(R=0.81,P <0.01);3)微观结构中,褐腐后菌丝渐渐生长至密集,木材试件的金属元素含量和各种金属元素浓度总体上都是呈现上升的趋势;4)相关分析表明,腐朽后木材电阻和离子浓度呈显著正相关关系,而与相对结晶度之间不存在显著的相关关系,说明褐腐后电阻变化的主要原因是由于金属元素的含量变化引起的。 相似文献
19.
不同产地栽培甘草中甘草酸含量的测定与比较 总被引：1，自引：0，他引：1
本文采用高效毛细管电泳法(HPCE)测定了14个不同栽培产地的甘草产品中的甘草酸含量,实验结果表明:不同栽培产地的甘草产品中的甘草酸含量有较大的差异,黑龙江省肇东地区栽培甘草的甘草酸含量最高,内蒙古的鄂托克前旗、赤峰和杭锦旗地区的栽培甘草的甘草酸含量依次降低,并以此为依据提出了建立甘草栽培基地应遵循的原则。图2表1参11。 相似文献
20.
Hu Chun-xiang Li Cheng-de Wang Zhi-ying D. Langor Yue Shu-kui Liu Kuan-yu Han Shij-ie 《林业研究》2000,11(3):213-214
A systematic observation and intensive study on the parasitoids ofPissodes nitidus were made in Langxiang and Xin'qing Forestry Bureau in Xiaoing'an Mountain area in 1996–1999, including the diagnosis, life
history, biological characteristics ofEurytoma sp. and parasitoid complex ofPissodes nitidus. There were about 70 species of parasitoids onPissodes nitidus, including Eurytomidae, Ichneumonidae and Braconidae etc. Among them,Eurytoma sp. is a dominant species and a braconid,Ipobracon sp. is a subdominant species, and they play an important role in controlling the pest.
Biography: HU Chun-xiang (1955-), male, Associate professor in Forest Resources and Environment Collage of Northeast Forestry University,
Harbin 150040, P. R. China
Responsible editor: Chai Ruihai 相似文献