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The Relative Molecular Mass, Monosaccharide Composition and Antioxidant Activity of Ziziphus jujuba FleshPolysaccharide at Different Stages [PDF]

open access: yes
For the purpose of exploring the polysaccharide content, relative molecular mass, monosaccharide composition, as well as antioxidant activity in Ziziphus jujuba flesh polysaccharide (ZJFP) at distinct growth stages. The content, relative molecular weight,
Guolong LI   +7 more
core   +1 more source

冲顶式上颌窦提升植骨牙种植动物模型的建立

open access: yesZhongshan Daxue xuebao. Yixue kexue ban, 2004
【目的】建立冲顶式上颌窦提升植骨牙种植的动物模型,以供上颌窦提升植骨牙种植的深入研究。【方法】拔除16只狗双侧上颌第一、第二磨牙,行冲顶式上颌窦提升,提升高度为2mm、4mm,一侧植骨,一侧不植骨,分别于术后3周、6周、12周、24周处死动物各4只,标本都经大体观察、放射检查及组织学检查。【结果】移植骨愈合良好,种植体牢固,窦底黏膜完整。上颌窦提升2mm时,种植体顶端可见骨质存在;提升4mm时,只见窦黏膜,不见新骨。上颌窦提升同期植骨并植入种植体,可见种植体顶端有新骨形成,覆盖种植体。【结论 ...
doaj  

几种手术方法治疗 52 例造釉细胞瘤的疗效分析

open access: yesZhongshan Daxue xuebao. Yixue kexue ban, 2002
【目的】探讨下颌骨造釉细胞瘤的治疗方法与治疗效果的关系。【方法】总例数 52 例, 其中 15 例采用下颌骨造釉细胞瘤单纯刮 治术式、11 例局部刮治加体内液氮冷冻、4 例采用下颌骨切除肋骨或髂骨游离移植或代用品植入修复、22 例采用瘤体连同下颌骨一并切除,刮 治干净,体外液氮冷冻后原位再植的术式,将上述 4种术式的结果进行比较。【结果】单纯刮治的术后复发率达 26.
吴纪楠, 陈觉尧
doaj  

不同耕作施肥方式对夏玉米氮素利用及土壤容重的影响

open access: yesShuitu Baochi Xuebao, 2019
合理的耕作与施肥方式是实现作物高产高效的重要措施,为研究不同耕作及施肥方式对夏玉米氮素利用、产量和土壤容重的影响,在2016年和2017年夏玉米生长时期分别设置免耕浅施肥(T1)、深松全层施肥(T2)、新型深松两肥异位分层施肥(T3)3种耕作施肥方式。结果表明:与T1比,2种深松处理的成熟期植株干物质积累量、全氮积累量平均分别提高9.68%,13.97%,夏玉米平均增产17.20%;深松耕作处理的氮肥生产效率和农学效率较T1平均分别增加14.74%和59.95%,氮肥表观利用率平均抬升14.15个百分点;
马阳   +7 more
doaj  

A Probe into Ecological Countryside Construction in China [PDF]

open access: yes, 2011
生态农村建设是当前建设社会主义新农村的重大举措,论文从农村的生态环境、基础条件和农民意识等方面,探讨了农村生态环境存在的问题,指出了加快农村生态建设的重要性,提出了加强乡镇企业环境综合整治、完善体制机制建设、发展生态农业、开展生态文明教育等措施。Ecological countryside is the construction of new socialist countryside major step,paper from the countryside ecological ...
刘立军   +4 more
core  

Effects of PBAT on Soil Water and Salt in Maize Root Zone and Maize Yield in Saline-alkali Land [PDF]

open access: yes
[Objective] In order to reduce soil pollution caused by plastic film, the application effect of using PBAT fully biodegradable plastic film instead of ordinary PE plastic film combined with drip irrigation to grow maize in mild secondary salinized soil ...
HOU Jiana   +6 more
core   +1 more source

长期种植大棚蔬菜对涂地土壤生物学性质的影响

open access: yesShuitu Baochi Xuebao, 2011
在浙东滨海平原选择连作时间为3~4年,8~10年和20年以上的大棚蔬菜地及蔬菜-水稻轮作8~10年和20年以上的大棚蔬菜地,同时选择刚围垦和经围垦改良脱盐的其他农地作为对照,分析研究不同种植年限和种植模式蔬菜地土壤微生物区系和酶活性,探讨长期种植蔬菜对涂地土壤生物学性质的影响。结果表明,围垦涂地种植蔬菜3~4年内,土壤有机质、氮和磷的全量和有效态、土壤微生物生物量碳、微生物数量、土壤酶活性均呈现增加的趋势,土壤质量明显改善;连作蔬菜8~10年后,土壤速效养分继续呈增加趋势,但土壤盐分显著积累 ...
单英杰, 章明奎
doaj  

Exposure assessment of geniposide in Gardenia consuming population [PDF]

open access: yes
ObjectiveTo understand the situation of Gardenia consumption in Chinese residents and to assess the geniposide exposure level and health risk of the Gardenia consumption population in China.MethodsData on geniposide content in Gardenia jasminoides in ...
BAO Huihui   +8 more
core   +1 more source

黄土高原丘陵沟壑区土地可持续利用研究方法探讨

open access: yesShuitu Baochi Xuebao, 2002
针对黄土高原丘陵沟壑区的土地可持续利用研究问题,探讨所采用的思路和方法,阐述所确定的模型以及交互式多目标线性规划的合理性。在模型验证的前提下,从土地生产力、土壤侵蚀、种植业结构、养殖业比例以及社会、经济、生态效益等多方面规划土地可持续利用的情景方案,从而提供多种土地利用模式以供选择。
常欣 刘国彬 程序
doaj  

Quality Analysis and Evaluation of Fleshy Stems and Leaves of 10 Lettuce Varieties [PDF]

open access: yes
Ten lettuce varieties (lines) grown in Chengdu Plain were used as test materials, and 8 post-harvest appearance quality indexes (single plant weight, single plant stem weight, single plant length, stem length, stem thickness, stem skin hardness, stem ...
Fangyao LUO   +5 more
core   +1 more source

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