Results 41 to 50 of about 13,863 (148)

元谋干热河谷区节水农业与林业的技术研究

open access: yesShuitu Baochi Xuebao, 2000
干旱缺水是提高干热河谷旱坡地粮食产量和提高植树造林成活率的主要制约因素。为了充分利用有限的降水,进行了旱坡地“地下地膜隔水墙”节水农业(节水造林)技术及果树节水灌溉栽培试验。结果表明,旱坡地粮食增产6.5%-20.2%,造林成活率提高20%-30%,果树栽培节水率60%-80%,且生长良好。
张建平 严俊华 等
doaj   +2 more sources

Clinical application of continuous fetal heart rate monitoring in active stage

open access: yesHuli yanjiu, 2005
[目的]观察活跃期持续胎心监护在早期发现胎儿窘迫及新生儿窒息方面的应用效果。[方法]观察组3025例产妇在活跃期应用持续胎心监护,对照组3108例产妇采用常规临产后行单次有刺激试验检查。[结果]观察组胎儿窘迫的诊断率为3.47%,显著高于对照组(1.71%),新生儿窒息的发生率为4.79%,其中轻度窒息的发生率为4.50%,重度窒息的发生率为0.30%,显著低于对照组 ...
黄秋群, 黄雪群
doaj  

Surface Sulfate Modification Promoted Excitons Extraction of BiOBr Nanosheets for Efficient 1O2 Photosynthesis and Chlorophenols Dechlorination

open access: yesRare Metals, Volume 45, Issue 2, February 2026.
ABSTRACT Photocatalytic molecular oxygen (O2) activation provides a sustainable approach to produce singlet oxygen (1O2) for organic contaminants detoxification. However, the charge carriers‐involved pathway usually suffers from unsatisfactory 1O2 production efficiency owing to energy loss caused by photogenerated hole‐mediated superoxide species (•O2−
Yan‐Biao Shi   +8 more
wiley   +1 more source

麝的繁殖和提高仔麝成活率

open access: yes野生动物学报, 1981
在人工养麝和活麝取香获得经验的基础上,进一步研究麝的繁殖和提高仔麝的成活率,是扩大麝群,增加麝的数量和麝香产量的重要途径。目前,全国大多数省(区)都在开展养麝生产活动,现将我们在养麝生产中麝的繁殖和提高仔麝成活率所采取的措施以原麝(Maschus moschiferus)为例做简要介绍,供参考。
毕书增, 颜于宏, 许树安
doaj  

N,W‐Cooperative Modulation of Ni3S2 for Efficient Electrocatalytic Oxidation of 5‐Hydroxymethylfurfural to 2,5‐Furandicarboxylic Acid

open access: yesRare Metals, Volume 45, Issue 2, February 2026.
ABSTRACT Ni3S2 has emerged as a promising catalyst for the electrochemical oxidation of biomass‐derived 5‐hydroxymethylfurfural (HMF) to 2,5‐furandicarboxylic acid (FDCA), driven by its distinctive physicochemical properties. However, its practical catalytic efficiency is severely hindered by abundant electrochemically inactive surface sites and poor ...
Cheng‐Feng Yi   +5 more
wiley   +1 more source

提高哺乳期海狸鼠成活率的初浅体会

open access: yes野生动物学报, 1994
提高哺乳期海狸鼠成活率的初浅体会苏盛源,刘久香(锦州畜牧兽医学校)(锦州市畜牧兽医站)1990-1991年锦州郊区有75户农民先后引入种海狸鼠510只。合计产仔2996只,哺乳期死亡425只,占产仔数14%,死亡率偏高。怎样提高仔鼠成活率呢?结合两年...
苏盛源, 刘久香
doaj  

Current Status and Prospects of Fertility Preservation Strategies for Patients with Tumors [PDF]

open access: yes
With the changing disease spectrum, the incidence of tumors is increasing and tends to occur among the youth. The long-term survival rate of patients with cancer has increased significantly, and attention to their reproductive rights is growing. Surgery,
Changyue YAO   +3 more
core   +1 more source

Composite‐Field Annealing Enables Superior High‐Temperature Noise Stability in Fluxgate Sensors With Co‐Rich Amorphous Microwires

open access: yesRare Metals, Volume 45, Issue 2, February 2026.
ABSTRACT Fluxgate sensors with Co‐rich amorphous microwires, widely used for their low noise in magnetic field measurements, encounter significant challenges in high‐temperature environments such as well drilling and geological exploration. Prolonged thermal aging degrades the performance of Co‐rich amorphous microwires, resulting in increased noise ...
Lining Pan   +10 more
wiley   +1 more source

On the Damage Tolerance of Diffusion Bonded Titanium–Aluminum Phase Biomimetic Composites

open access: yesRare Metals, Volume 45, Issue 2, February 2026.
ABSTRACT The biomimetic design principles of natural structures involve the strategic integration of stiff and compliant phases to synergistically enhance strength and toughness. Its evolutionary refined natural armor, characterized by a specialized microarchitecture, enables superior damage tolerance.
Shuai Tong   +10 more
wiley   +1 more source

超微细磷钾-活化剂肥在小白菜上的肥效研究

open access: yesShuitu Baochi Xuebao, 2018
为提高磷钾肥的有效性,减少磷钾肥固定及淋失,提高作物产量,节约农业资源和减少面源污染,研制超微细磷钾—活化剂肥,通过盆栽小白菜试验,研究该肥对小白菜的产量、品质、土壤养分含量及肥料利用率的影响。以常规磷钾肥和添加腐殖酸磷钾肥为对照,研究磷钾肥与腐殖酸、沸石粉、硅藻土活化剂不同配比并磨细制造超微细磷钾—活化剂肥施肥效果,共9个处理。结果表明:超微细磷钾—活化剂肥显著提高了小白菜的产量,增产率达13.22%~35.14%;超微细磷钾—腐殖酸—沸石粉肥、超微细磷钾—腐殖酸—硅藻土肥、超微细磷钾肥—腐殖酸 ...
王桂伟   +6 more
doaj  

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