Results 41 to 50 of about 15,012 (166)
Cell wall water shields stomata against falling leaf airspace humidity
Summary Plants lose water by transpiration through stomatal pores. However, it remains a matter of debate whether relative humidity (RH) in the substomatal cavity may fall below saturation and guard cells experience strong differences water potential driven by RH in the cavity.
Michael R. Blatt +3 more
wiley +1 more source
Fermentative production of poly(malic acid) by Aureobasidium Sp.A-91 [PDF]
Thesis (Ph.D. in Agriculture)--University of Tsukuba, (A), no.
Nagata Naoki, 長田 直樹
core
采用恒温培养法研究美国纽约Pelham Bay Park 6种典型淡水湿地沉积物中磷的吸附与解吸行为及其动力学过程。结果表明:湿地沉积物具有强烈吸附溶液中磷的功能,随着溶液中磷浓度的增加,吸附量增大;但是湿地沉积物也有释放磷到溶液中去的功能,释放量为0~41.19 mg/kg,与沉积物吸附磷量的关系不大,沉积物释放磷与沉积物的特性有关。衡量一种淡水湿地沉积物的除磷能力,可根据沉积物最大吸附磷量和吸附解吸附平衡浓度(EPC0)来衡量,6种沉积物中,磷的最大吸附能力强弱依次是:S1>S2>S3>S6>S5 ...
黄树辉, 曾光辉, 黄宏
doaj
ABSTRACT Low conductivity, slow ion‐diffusion, and limited reactive sites are common problems in electrocatalysts and electrode materials. In this study, a complex NiTe–CoTe heterojunction with abundant Te vacancies embedded in N, P, and F co‐doped hollow carbon nanorods (NiTe1−x–CoTe1−x/NPFC) was fabricated via a simple ionic liquid‐assisted ...
Mingjie Yi +7 more
wiley +1 more source
Study on the Preparation of Novel Sorbents based Porous Monolithic Materials and Its Application [PDF]
整体材料因其制备简单、可“原位”聚合、通透性好、传质速率快、易化学改性等优点而被广泛应用于样品前处理过程中。本研究制备了四种新型整体材料,并结合搅拌饼固相萃取和纤维固相微萃取技术与高灵敏分析仪器联用,建立了环境水样中苯胺类、苯甲酰脲类农药、重金属锑和氯代酚类的分析方法。具体研究内容如下: 1.制备了掺杂氧化石墨烯的聚乙二醇二甲基丙烯酸酯整体材料(EDMA/GO),并将其用作搅拌饼固相萃取(stircakesorptiveextraction,SCSE)的吸附剂,考察了不同单体、交联剂 ...
张咏
core
于2006年7~8月通过对京西百花山区6种植物群落凋落物的不同分解层次的蓄积量、自然含水率、最大持水率、吸水速度以及有效拦蓄水量进行测定。研究结果表明:凋落物蓄积量油松(Pinus tabulaef ormis)群落最高达到18.5 t/hm2,杂类草凋落物最低只有3.9 t/hm2,同一植物群落凋落物不同层次蓄积量未分解层低于半分解层,自然含水率未分解层低于半分解层,不同层次自然含水率差值最大的青杨(Populuscathayana)凋落物差值为97.1%;同一植物群落凋落物不同层次持水能力 ...
刘尚华 +7 more
doaj +2 more sources
采集我国西北地区的黄绵土、土娄土和石灰性褐土3种典型土壤,分别包括农田和自然林地土壤,通过不同土壤类型及利用方式的比较,研究这三类土壤对锌的吸附-解吸特性。结果表明,各土壤对锌的吸附量均随平衡液锌浓度的增加而增大,均可用Langmuir方程、Freundlich方程和Temkin方程来描述,相关系数均达到显著或极显著水平;土壤对锌的解吸量随吸附量的增大而增加。在3种土壤中土娄土对锌的最大吸附量、最大缓冲容量以及对锌的吸附作用力以及固定量都最大;石灰性褐土对锌的最大吸附量大于黄绵土 ...
徐温新 +5 more
doaj
ABSTRACT As a promising alternative to sluggish Li2CO3‐based Li‐CO2 electrochemistry, Li2C2O4 offers a favorable 2e− discharge pathway, yet its selective formation and reversible decomposition remain debated. Herein, we propose a nonmetal‐metal synergistic catalyst—B‐Ti coregulated layered transition metal boride Ti18B18O9/graphene (B‐Ti/TiBOG)—to ...
Qiong Peng +8 more
wiley +1 more source
Analysis of Differentially Expressed Proteins in Self-Paired Sera of Advanced Non-small Cell Lung Cancer Patients Responsive to Gefin [PDF]
Background and objective All the advanced NSCLC patients that received EGFR-TKI therapy will eventually relapse after a period of efficacy. The aim of this study is to investigate the serum biomarkers as potential predictive factors for the efficacy of ...
Ailin GUO +10 more
core
[目的 ]观察呼吸康复训练对缓解期慢性阻塞性肺疾病 (COPD)病人的影响。 [方法 ]缓解期COPD 3 0例门诊病人为对照组 ,3 0例住院病人为实验组。对照组给予单纯药物治疗 ,实验组除药物治疗外给予呼吸康复训练。 [结果 ]呼吸功能实验组较对照组有显著改善 (P
韩典慧, 梁焕
doaj

