نتایج جستجو برای: liquid media
تعداد نتایج: 490713 فیلتر نتایج به سال:
Gelled propellants are improved propellants that can be considered as the final extension of liquid propellants. High specific impulse, good density and safety better than that of both solid and liquid propellants are advantages of the gel propellants. They are made by addition a suitable gellant to liquid propellants. In this research, nano Al particles have been used in UDMH gel fuel. The gel...
The objective of this study was to examine the pore-scale distribution and morphology of organic immiscible liquid in natural porous media containing three immiscible fluids. High-resolution, threedimensional images of an organic liquid (tetrachloroethene) in both three-phase (water–air–organic liquid) and two-phase (water–organic liquid) systems were obtained using synchrotron X-ray microtomog...
در این پژوهش منشاء خزندگان را مورد بررسی قرار داده، خانواده های سوسماران را در ایران معرفی نموده و ویژگی های آنها را ذکر کرده ایم، خانواده lacertidae را از منظر فیلوژنی، رده بندی و همچنین جنس های آن را، مرور کرده ایم. جنس lacerta که هدف اصلی پژوهش حاضر است در ایران دارای دو گونه می باشد؛ یکی گونه ی lantz & cyrén, 1920 lacerta media که از این گونه، تنها زیرگونه ی lacerta media media lantz & cy...
گیاه بعد از جمع آوری توسط گیاه شناس تأیید شد، سپس بخش هوایی آن خشک و پودر شده و عصاره تام متانولی آن به روش پرکولاسیون تهیه گردید. فراکسیون های اتردپترولی، کلروفرمی، اتیل استاتی، متانولی و آبی آن به ترتیب به روش liquid – liquid fractionation از عصاره تام تهیه شد. عصاره و فراکسیون های بدست آمده تغلیظ و در نهایت خشک شده و جهت بررسی اثر ضد باکتری در ظروف تمیز، تیره و در جای خنک نگهداری شدند. اثر ...
We present precision neutron scattering measurements of the dynamic structure factor S(Q ,v) and the elementary excitations of liquid He immersed in aerogel and Vycor. In both porous media, liquid He supports two-dimensional ~2D! layer modes at wave vectors in the roton region that propagate in the liquid layers adjacent to the media walls. The layer modes have a rotonlike energy dispersion rel...
Protozoan hemoflagellates Leishmania are causative agents of leishmaniases and an important biological model for study of host-pathogen interaction. A wide range of methods of Leishmania cultivation on both biphasic and liquid media is available. Biphasic media are considered to be superior for initial isolation of the parasites and obtaining high promastigote infectivity; however, liquid media...
Excellent electrophoretic separations of a variety of biological molecules can be accomplished by using uncharged, triblock copolymers as the "gel" media. These copolymers form uncrosslinked, lyotropic liquid crystalline phases of large micelles between which molecules must travel. Unlike crosslinked hydrogels in common use, these alternative media have highly ordered internal structures. Pluro...
Despite substantial improvements in solid culture media for gonococci and the development of liquid media for the short-term growth of the organism, we know of no study of the long-term survival of Neisseria gonorrhoeae in liquid medium. A new liquid medium for N. gonorrhoeae formulated in this laboratory is simple, efficient, and promising. It will support growth and sustain inoculated colony ...
Streptomyces coelicolor differentiates on solid agar media by forming aerial hyphae that septate into spores. We here show that differentiation also occurs in standing liquid minimal media. After a period of submerged growth, hyphae migrate to the air interface, where they become fixed by a rigid reflecting film. Colonies that result from these hyphae form sporulating aerial hyphae. In addition...
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